Energy-saving double-shell centrifugal slurry pump

Abstract

The invention discloses an energy-saving double-shell centrifugal slurry pump, and relates to the technical field of slurry pump manufacturing, the energy-saving double-shell centrifugal slurry pump comprises a machine body, a pump body, a driving assembly and a pressure power generation assembly, the pump body is installed on the machine body, an output hole and an input hole are formed in the pump body, an impeller and a sheath are arranged in the pump body, the driving assembly is installed on the machine body, and the pressure power generation assembly is installed on the machine body. The driving assembly is used for driving the impeller to rotate, the pressure power generation assembly is installed on the pump body, and the pressure power generation assembly converts pressure energy borne by the sheath into electric energy. The device has the effect that the energy consumption of the device can be reduced while stable transportation of the medium is guaranteed as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of slurry pump manufacturing, and in particular to an energy-saving double-shell centrifugal slurry pump. Background Art

[0002] Double-shell centrifugal slurry pump is a centrifugal pump with a double pump shell structure. It generates centrifugal force through the rotation of the impeller, thereby increasing the energy of the solid-liquid mixed medium (i.e. slurry) and converting electrical energy into kinetic energy and potential energy of the medium. This pump is mainly used to transport slurries containing abrasive solid particles.

[0003] The double-shell centrifugal slurry pump consists of two layers of metal structures, the inner pump shell includes impeller, jacket, front guard plate, rear guard plate and other components, the outer pump shell consists of pump body and pump cover. The working principle of the double-shell centrifugal slurry pump is similar to that of the centrifugal pump. When the motor drives the impeller to rotate, the blades in the impeller throw the medium out to form a high-pressure area. At the same time, a low-pressure area is formed in the center of the impeller to suck in new medium. In this way, the medium is continuously thrown out and sucked in under the action of the impeller, thereby realizing the transportation of the medium.

[0004] However, in the above technology, the medium located at the center of the inner pump will move in a direction away from the center of the inner pump under the action of centrifugal force, and the medium will obtain huge kinetic energy and pressure energy during this movement. Therefore, when the medium moves to the edge of the inner pump, the medium will violently hit the sleeve on the inner pump. In the process of the medium hitting the sleeve, the medium will lose its kinetic energy due to the impact with the sleeve. Therefore, when the medium needs to be transported to a specified position, the motor needs to provide a greater centrifugal force to ensure that the medium can obtain sufficient kinetic energy and the medium can be transported stably, thereby increasing the output power of the motor and energy consumption. Summary of the invention

[0005] The purpose of the present application is to provide an energy-saving double-shell centrifugal slurry pump that can reduce the energy consumption of the equipment while ensuring stable medium transportation as much as possible.

[0006] The energy-saving double-shell centrifugal slurry pump provided in this application adopts the following technical solution: Body; A pump body is mounted on the machine body, an output hole and an input hole are provided on the pump body, and an impeller and a sheath are arranged inside the pump body; A driving assembly, mounted on the machine body, and used to drive the impeller to rotate; A pressure power generation component is installed on the pump body, and the pressure power generation component converts the pressure energy exerted on the sheath into electrical energy.

[0007] Optionally, a sealed space is formed between the sheath and the pump body; The pressure power generation component includes a piezoelectric ceramic sheet, and a positive conductive column and a negative conductive column are provided on the pump body. The piezoelectric ceramic sheet is installed on the inner wall of the pump body, and the positive and negative poles of the piezoelectric ceramic sheet are respectively abutted against the positive conductive column and the negative conductive column. One end of the positive conductive column and the negative conductive column away from the piezoelectric ceramic sheet is electrically connected to the driving component through a wire, and the piezoelectric ceramic sheet, the positive conductive column and the negative conductive column are all located in a sealed space formed between the sheath and the pump body.

[0008] Optionally, a mounting groove for placing the piezoelectric ceramic sheet is provided on the inner wall of the pump body, an elastic pad is provided in the mounting groove, the ceramic end of the piezoelectric ceramic sheet abuts against the elastic pad, and the ceramic end of the piezoelectric ceramic sheet is electrically connected to the negative conductive column through a wire.

[0009] Optionally, a rubber ring is sleeved on the periphery of the piezoelectric ceramic sheet, and the rubber ring is pressed tightly against the groove wall of the installation groove.

[0010] Optionally, a plurality of piezoelectric ceramic sheets are provided, and the plurality of piezoelectric ceramic sheets are arranged at intervals around the axis of the pump body, and correspondingly, a plurality of positive conductive columns, negative conductive columns, mounting grooves and elastic pads are provided.

[0011] Optionally, the pump body includes an outer pump shell and an outer pump shell, and an end spacing is left between the inner circumferential wall of the outer pump shell and the outer circumferential wall of the inner pump shell, the piezoelectric ceramic sheet is installed on the inner circumferential wall of the inner pump shell, and the sheath and the inner pump shell form a sealed space, the positive conductive column and the negative conductive column extend to the outer circumferential wall of the inner pump shell at one end away from the piezoelectric ceramic sheet, and the outer circumferential wall of the outer pump shell is connected with a wire tube, and the end of the wire tube away from the outer pump shell is connected to the drive assembly.

[0012] Optionally, a detection component is provided on the wire tube, and the detection component is used to detect whether each of the piezoelectric ceramic sheets and the corresponding wires are in a normal working state.

[0013] Optionally, the detection component includes a plurality of detection lights, which are mounted on the wire tube, and the plurality of detection lights correspond one-to-one to a plurality of piezoelectric ceramic sheets, and the detection lights are electrically connected to the wires on the corresponding piezoelectric ceramic sheets.

[0014] In summary, the present application includes at least one of the following beneficial technical effects: 1. After the driving component in the present application is started, the driving component will provide strong kinetic pressure energy to the medium in the pump body, and then the medium with strong kinetic energy will impact the sheath. After the sheath is impacted by the medium, the sheath will exert pressure on the piezoelectric ceramic sheet on the inner wall of the inner pump shell. The piezoelectric ceramic sheet will deform slightly after being subjected to pressure, thereby generating electrical energy, which can then be stored or directly supplied to the driving component on the device. On the whole, the pressure power generation component in the present application can collect the energy wasted due to mechanical loss in the process of providing energy for the driving component, and convert it into the electrical energy required by the driving component, thereby reducing energy waste and achieving the energy-saving effect of the present device; 2. The brightness of the detection light in this application can not only well reflect the working status of the piezoelectric ceramic sheet and the conductive wire, so as to judge whether the corresponding piezoelectric ceramic sheet and the conductive wire are damaged, so as to replace the corresponding components in time; in addition, since the piezoelectric ceramic sheet has positive and negative poles, it will short-circuit after contacting the water source, thereby causing damage to the piezoelectric ceramic sheet. Therefore, when the equipment is started, most or even all of the detection lights in the equipment are in the off state. At this time, the situation reflected may be that the sheath is damaged and the medium flows into the sealed space between the sheath and the inner pump shell. Therefore, the staff can also judge whether the equipment is leaking according to the number of detection lights on, so that the staff can repair the pump in time, which greatly improves the practicality of this equipment; 3. The pressure power generation component in this application is mainly composed of piezoelectric ceramic sheets, which are relatively small in size and will not increase the volume of the entire device. The manufacturing cost of the piezoelectric ceramic sheets is also relatively low, and the manufacturing cost of the entire device is not increased too much, thereby further improving the practicality of the device to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a structural cross-sectional view of a pump body in an embodiment of the present application; Figure 3 yes Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 yes Figure 2 The enlarged schematic diagram of point B in the middle; Figure 5 yes Figure 2 The enlarged schematic diagram of the center C; In the figure, 1, machine body; 2, pump body; 21, outer pump shell; 211, first shell; 212, second shell; 22, inner pump shell; 221, third shell; 222, fourth shell; 223, crimping groove; 224, mounting groove; 23, drive shaft; 24, impeller; 25, rear guard plate; 26, front guard plate; 261, crimping protrusion; 27, sleeve; 28, input hole; 29, output hole; 3, drive assembly; 31, drive motor; 32, bearing box; 4, pressure power generation assembly; 41, piezoelectric ceramic sheet; 42, positive conductive column; 43, negative conductive column; 44, elastic pad; 45, rubber ring; 6, conductive wire tube; 7, detection assembly; 71, detection lamp. DETAILED DESCRIPTION

[0016] The following is combined with Figure 1-5 , further details of this application are given.

[0017] An energy-saving double-shell centrifugal slurry pump, referring to Figure 1 , Figure 3 and Figure 3 , including a machine body 1, a pump body 2, a driving component 3 and a pressure power generation component 4.

[0018] In this embodiment, the pump body 2 and the driving assembly 3 are both fixedly mounted on the upper end surface of the machine body 1 , and the driving assembly 3 mainly includes a driving motor 31 , a bearing box 32 and a driving shaft 23 .

[0019] The driving motor 31 is fixedly mounted on the upper end surface of the machine body 1, and the bearing box 32 is also fixedly mounted on the upper end surface of the machine body 1 and is located on one side of the driving motor 31. One end of the driving shaft 23 is coaxially fixedly connected to the output shaft of the driving motor 31, and the other end of the driving shaft 23 passes through the bearing box 32, and the driving shaft 23 is rotatably connected to the bearing box 32. In this embodiment, a plurality of bearings and other components are arranged in the bearing box 32, which is mainly to ensure the stable rotation of the driving shaft 23. It is a prior art, so it will not be elaborated here.

[0020] An output hole 29 is provided on the peripheral wall of the pump body 2 in this embodiment, an input hole 28 is coaxially provided at the end of the pump body 2 away from the bearing box 32, and a through hole for inserting the drive shaft 23 is also provided at the end of the pump body 2 close to the bearing box 32. The bearing box 32 is located between the pump body 2 and the drive motor 31.

[0021] The pump body 2 is provided with a sleeve 27 and an impeller 24 inside. The sleeve 27 in this embodiment is made of rubber and is similar in shape to the pump body 2. The difference between the sleeve 27 and the pump body 2 is that the volume of the sleeve 27 is relatively small, so the sleeve 27 can be coaxially placed inside the pump body 2. The sleeve 27 is also provided with an input hole 28, an output hole 29 and a through hole. In this embodiment, the hole wall of the input hole 28 on the sleeve 27 is fixedly connected to the hole wall of the input hole 28 of the pump body 2. The output hole 29 on the sleeve 27 is fixedly connected to the wall of the input hole 28 of the pump body 2. The hole wall is fixedly connected to the hole wall of the output hole 29 of the pump body 2, and the hole wall of the through hole on the sleeve 27 is fixedly connected to the hole wall of the through hole of the pump body 2. Therefore, the sleeve 27 in this embodiment can be regarded as the inner lining of the pump body 2, and a relative sealed space is formed between the outer wall of the sleeve 27 and the inner wall of the pump body 2. This sealed space is relatively small. When the equipment is in working state, the vibration of the equipment or the impact of the medium can still cause a certain elastic deformation of the sleeve 27, so that the outer wall of the sleeve 27 abuts against the inner wall of the pump body 2.

[0022] One end of the drive shaft 23 extending into the pump casing also extends into the sleeve 27. A sealed bearing (not shown in the figure) is arranged between the drive shaft 23 and the hole wall of the through hole on the pump body 2. The drive shaft 23 is coaxially arranged with the pump body 2. The impeller 24 is located inside the sleeve 27, and the impeller 24 is coaxially fixedly connected with the drive shaft 23.

[0023] The pressure power generation component 4 includes a piezoelectric ceramic sheet 41 .

[0024] It should be noted that the piezoelectric ceramic sheet 41 in this embodiment is composed of a ceramic part and a copper part. The ceramic part is oblate and the copper part is annular. The copper part is wrapped around the outer wall of the ceramic part. The ceramic part has the ability of elastic deformation. When two conductive wires are connected to the ceramic part and the copper part respectively, and then the two conductive wires are connected to electrical equipment, when the ceramic part is squeezed, the piezoelectric ceramic sheet 41 will generate electrical energy and function the electrical equipment through the conductive wire. The piezoelectric ceramic sheet 41 is a prior art and will not be described in detail here.

[0025] The piezoelectric ceramic piece 41 in this embodiment is fixedly mounted on the inner wall of the pump body 2, and the piezoelectric ceramic piece 41 is located in the sealed space between the sheath 27 and the pump body 2. A positive guide column and a negative guide column are arranged in the peripheral wall of the pump body 2. The positive guide column and the negative guide column are arranged in a direction perpendicular to the peripheral wall of the pump body 2. One end of the positive guide column extends to the inner wall of the pump body 2 and abuts against the copper part of the piezoelectric ceramic piece 41. The other end of the positive guide column extends to the outer wall of the pump body 2. Similarly, one end of the negative guide column extends to the inner wall of the pump body 2 and abuts against the ceramic part of the piezoelectric ceramic piece 41. The other end of the negative guide column extends to the outer wall of the pump body 2. Then, the positive guide column and the negative guide column located on the outer wall of the pump body 2 are connected to the positive and negative poles of the drive motor 31 through conductive wires.

[0026] When the equipment needs to work, the drive motor 31 is started, and the drive motor 31 drives the drive shaft 23 to rotate, and then the drive shaft 23 drives the impeller 24 to rotate. The rotation of the impeller 24 will exert a strong centrifugal force on the medium inside the sheath 27. Under the action of the centrifugal force, the medium in the middle part of the sheath 27 will move from the middle part of the sheath 27 to the edge part of the sheath 27. In this process, the centrifugal force on the medium will continue to increase, so that the medium will obtain a relatively large speed and kinetic energy. When the medium with high kinetic energy moves to the edge part of the sheath 27, the sheath 27 will undergo elastic deformation due to the impact of the medium, and then the elastically deformed sheath 27 will impact the piezoelectric ceramic sheet 41 on the inner wall of the pump body 2. The ceramic part on the piezoelectric ceramic sheet 41 will also undergo elastic deformation after being squeezed by the sheath 27, so that the piezoelectric ceramic sheet 41 will generate current, and then the generated current is transmitted to the drive motor 31 through the positive conductive column 42, the negative conductive column 43 and the conductive wire, thereby transmitting energy for the operation of the drive motor 31.

[0027] On the whole, in this embodiment, the medium will lose a part of its kinetic energy when it hits the sheath 27, and this part of the kinetic energy will cause the sheath 27 to squeeze the piezoelectric ceramic sheet 41, thereby collecting part of the kinetic energy lost by the medium during operation and re-transmitting it to the drive motor 31. Therefore, the power consumption required for the drive motor 31 to work is reduced, thereby reducing energy waste as a whole, and further achieving the energy-saving effect of the present equipment.

[0028] Among them, refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The pump body 2 in this embodiment includes an outer pump shell 21 and an inner pump shell 22. The inner pump shell 22 is fixedly mounted on the inner wall of the outer pump shell 21, and a distance is left between the outer peripheral wall of the inner pump shell 22 and the inner peripheral wall of the outer pump shell 21.

[0029] The outer pump housing 21 includes a first housing 211 and a second housing 212 . The first housing 211 and the second housing 212 have similar structures. The first housing 211 is provided with a through hole for inserting the drive shaft 23 , and the second housing 212 is provided with an input hole 28 .

[0030] Similarly, the inner pump housing 22 in the present embodiment also includes a third housing 221 and a fourth housing 222. The third housing 221 is fixedly mounted on the inner wall of the first housing 211. The third housing 221 is coaxially arranged with the first housing 211, and the third housing 221 and the first housing 211 share the same through hole. The fourth housing 222 is fixedly mounted on the second housing 212. The fourth housing 222 is coaxially arranged with the second housing 212, and the fourth housing 222 and the second housing 212 share the same input hole 28. The peripheral wall width of the first housing 211 is the same as the peripheral wall width of the second housing 212, and the peripheral wall width of the third housing 221 is greater than that of the second housing 212. The width of the third shell 221 is greater than that of the peripheral wall of the fourth shell 222, and the piezoelectric ceramic sheet 41, the positive conductive column 42 and the negative conductive column 43 are all installed on the third shell 221, and the conductive wires connected to the positive conductive column 42 and the negative conductive column 43 are also placed in the space between the outer pump shell 21 and the inner pump shell 22 to avoid the conductive wires being exposed to the outside as much as possible, which may cause damage to the conductive wires; a conductive wire tube 6 is also connected to the outer wall of the first pump shell, and one end of the conductive wire tube 6 is inserted into the space between the outer pump shell 21 and the inner pump shell 22, and the end of the conductive wire tube 6 away from the pump body 2 extends to the drive motor 31, and the conductive wire tube 6 can further protect the conductive wires.

[0031] Secondly, in this embodiment, a plurality of piezoelectric ceramic sheets 41 are provided, and the plurality of piezoelectric ceramic sheets 41 are arranged at intervals around the axis of the third shell 221, and a plurality of corresponding positive conductive columns 42 and negative conductive columns 43 are also provided, and the plurality of groups of positive conductive columns 42 and negative conductive columns 43 correspond one-to-one to the plurality of piezoelectric ceramic sheets 41, and then two conductive wires are provided corresponding to each piezoelectric ceramic sheet 41, and the two conductive wires form a group, and the wires of each group are located in the space between the outer pump shell 21 and the inner pump shell 22, and are electrically connected to the drive motor 31 through a wire tube, and each piezoelectric ceramic sheet 41 works independently for the function of the drive motor 31 without interfering with each other.

[0032] The medium transported by the equipment in this embodiment is slurry, which usually contains solid particles. The distribution and flow of these particles in the pump are often uneven. Therefore, the force conditions at different parts of the sheath 27 when impacted by the medium will also be different. The arrangement of multiple piezoelectric ceramic sheets 41 can collect the kinetic energy lost when the medium impacts multiple parts of the sheath 27, thereby further reducing energy waste as a whole, and further improving the energy-saving effect of the equipment.

[0033] In addition, in this embodiment, a rear guard plate 25 is provided at the through hole of the pump body 2, and a rear guard plate 25 is provided at the input hole 28 of the pump body 2. In the actual installation process, the first housing 211 will be first fixedly installed on the bearing box 32 and the body 1 by bolts, and the drive shaft 23 on the bearing box 32 will pass through the through hole coaxially, and then the sleeve 27 will be placed in the third pump housing, and the drive shaft 23 will also pass through the through hole on the sleeve 27 and be located inside the sleeve 27, and then the rear guard plate 25 will be coaxially sleeved on the drive shaft 23, and the outer wall diameter of the rear guard plate 25 will be larger than the through hole on the first pump housing. The diameter of the hole, when the rear guard plate 25 is sleeved on the drive shaft 23, the rear guard plate 25 is moved in the direction close to the bearing box 32, and the rear guard plate 25 directly abuts against the inner wall of the sleeve 27. As the rear guard plate 25 continues to move, the rear guard plate 25 will tightly press the part of the sleeve 27 in contact with it against the inner wall of the third shell 221, and then fix the rear guard plate 25 to the bearing box 32 by bolts. In this embodiment, the pressing part of the rear guard plate 25 and the sleeve 27 just surrounds the through hole, and a sealed bearing (not shown in the figure) is arranged between the drive shaft 23 and the inner wall of the rear guard plate 25.

[0034] The front guard plate 26 in this embodiment is similar to a column base, which has a mounting portion and a pipe portion. After the rear guard plate 25 is installed, the impeller 24 is coaxially fixedly installed on the outer wall of the drive shaft 23, and the impeller 24 is coaxially located inside the sleeve 27. Then the front guard plate 26 is placed on the impeller 24, and the mounting portion is located inside the sleeve 27. Then the second shell 212 is docked with the first shell 211. During the docking process, the input hole 28 on the second shell 212 is coaxially sleeved on the pipe portion on the front guard plate 26. Then the pipe portion of the front guard plate 26 is moved in a direction away from the impeller 24 until the mounting portion of the front guard plate 26 presses part of the sleeve 27 against the inner wall of the fourth shell 222. Then the front guard plate 26 is fixed to the second shell 212 by bolts. Finally, the first shell 211 and the second shell 212 are fixedly connected by bolts.

[0035] Through the installation method described above, the first shell 211 and the second shell 212 will enclose the outer pump shell 21, the third shell 221 and the fourth shell 222 will enclose the inner pump shell 22, and the setting of the front guard plate 26 and the rear guard plate 25 can not only protect the impeller 24, but also form a relatively sealed space between the outer wall of the sleeve 27 and the inner wall of the inner pump shell 22 by pressing. Therefore, when the medium flows into the pump body 2, the medium will enter the sleeve 27 through the pipeline portion of the front guard plate 26, and then flow out from the output hole 29 on the sleeve 27. The medium will not flow into the sealed space between the sleeve 27 and the inner pump shell 22, so that the medium will not affect the normal operation of the piezoelectric ceramic sheet 41, thereby ensuring the normal operation of the equipment.

[0036] In order to further enhance the sealing performance of the space between the sleeve 27 and the inner pump shell 22, an annular crimping groove 223 is provided on the inner walls of the third shell 221 and the fourth shell 222, and the crimping groove 223 is coaxially arranged with the input hole 28 and the through hole. The front guard plate 26 and the rear guard plate 25 are provided with corresponding annular crimping protrusions 261. When the rear guard plate 25 presses the sleeve 27 against the inner wall of the third shell 221, the crimping protrusion 261 on the rear guard plate 25 will press the sleeve 27 into the crimping groove 223 on the third shell 221; similarly, when the front guard plate 26 presses the sleeve 27 against the inner wall of the third shell 221, the crimping protrusion 261 on the rear guard plate 25 will press the sleeve 27 into the crimping groove 223 on the third shell 221; When pressed against the inner wall of the fourth shell 222, the indentation on the front guard plate 26 will press the sleeve 27 into the crimping groove 223 on the fourth shell 222. The setting of the crimping groove 223 and the crimping protrusion 261 can increase the contact area between the sleeve 27 and the third shell 221 and the fourth shell 222, thereby increasing the friction between the sleeve 27 and the third shell 221 and the fourth shell 222. The connection strength of the contact part between the sleeve 27 and the third shell 221 and the fourth shell 222 is high, thereby improving the sealing of the space between the sleeve 27 and the inner pump shell 22.

[0037] In order to avoid the piezoelectric ceramic piece 41 from being damaged due to excessive extrusion, in this embodiment, a mounting groove 224 for placing the piezoelectric ceramic piece 41 is opened on the inner wall of the third shell 221, and an elastic pad 44 is arranged in the mounting groove 224. The positive conductive column 42 located in the peripheral wall of the third shell 221 extends to the groove wall of the mounting groove 224 at one end close to the piezoelectric ceramic piece 41. Similarly, the negative conductive column 43 extends to the groove wall of the mounting groove 224 at one end close to the piezoelectric ceramic piece 41. The piezoelectric ceramic piece 41 is placed on the elastic pad 44 at one end away from the positive conductive column 42, and then the positive conductive column 42 and the negative conductive column 43 are electrically connected to the piezoelectric ceramic piece 41 through a conductive wire, and the conductive wire passes through the elastic pad 44.

[0038] When the medium impacts the sheath 27 with a certain elasticity, the sheath 27 undergoes a certain elastic deformation and squeezes the piezoelectric ceramic sheet 41. The piezoelectric ceramic sheet 41 undergoes elastic deformation during the compression process, thereby generating current, which is then transmitted to the positive conductive column 42 and the negative conductive column 43 through the conductive wire, and then transmitted to the drive motor 31 through the conductive wire to operate the drive motor 31. After the piezoelectric ceramic sheet 41 is subjected to excessive pressure, the elastic pad 44 can undergo a certain elastic deformation, thereby buffering the excessive pressure on the piezoelectric ceramic sheet 41, thereby minimizing the damage to the piezoelectric ceramic sheet 41; at the same time, the conductive wire can convert the rigid abutment between the positive conductive column 42 and the negative conductive column 43 and the piezoelectric ceramic sheet 41 into an electrical connection, thereby minimizing the rupture of the piezoelectric ceramic sheet 41 due to rigid collision, further reducing the probability of damage to the piezoelectric ceramic sheet 41.

[0039] At the same time, a rubber ring 45 is sleeved on the peripheral wall of the piezoelectric ceramic piece 41, and the rubber ring 45 is tightly pressed against the groove wall of the mounting groove 224. This design not only enables the piezoelectric ceramic piece 41 to be conveniently snapped into the mounting groove 224, but also the rubber ring 45 can play a certain protective role for the piezoelectric ceramic piece 41, thereby further reducing the probability of damage to the piezoelectric ceramic piece 41.

[0040] A detection component 7 is also provided on the conductive wire tube 6 in this embodiment. The detection component 7 in this embodiment includes a plurality of detection lights 71. The number of the detection lights 71 in this embodiment corresponds one-to-one to the number of the piezoelectric ceramic sheets 41. The detection lights 71 are electrically connected to the conductive wires on the corresponding piezoelectric ceramic sheets 41.

[0041] When the equipment is started, the medium in the pump body 2 will impact various parts of the sheath 27, and the piezoelectric ceramic piece 41 in contact with the impacted part of the sheath 27 will be squeezed, thereby generating current, and the current will flow into the drive motor 31 through the positive conductive column 42, the negative conductive column 43 and the conductive wire, and when the current flows through the detection light 71 on the conductor, the detection light 71 will light up.

[0042] The brightness of the detection light 71 can not only well reflect the working status of the piezoelectric ceramic piece 41 and the conductive wire, so as to judge whether the corresponding piezoelectric ceramic piece 41 and the conductive wire are damaged, so as to replace the corresponding components in time; in addition, since the piezoelectric ceramic piece 41 has positive and negative poles, it will short-circuit after contacting the water source, thereby causing damage to the piezoelectric ceramic piece 41. Therefore, when the equipment is started, most or even all of the detection lights 71 in the equipment are in the off state. At this time, the situation reflected may be that the sheath 27 is damaged, and the medium flows into the sealed space between the sheath 27 and the inner pump casing 22, thereby causing the piezoelectric ceramic piece 41 to short-circuit. Therefore, the staff can also judge whether the sheath 27 is damaged according to the number of detection lights 71 that are on, so that the staff can repair or replace the sheath 27 in time, which greatly improves the practicality of the equipment.

[0043] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An energy-saving double-shell centrifugal slurry pump, characterized in that: include: Body (1); A pump body (2) is mounted on the machine body (1); an output hole (29) and an input hole (28) are provided on the pump body (2); an impeller (24) and a sheath (27) are provided inside the pump body (2); A driving assembly (3) mounted on the machine body (1), the driving assembly (3) being used to drive the impeller (24) to rotate; A pressure power generation component (4) is mounted on the pump body (2), and the pressure power generation component (4) converts the pressure energy exerted on the sheath (27) into electrical energy.

2. The energy-saving double-shell centrifugal slurry pump according to claim 1 is characterized in that: A sealed space is formed between the sheath (27) and the pump body (2); The pressure power generation component (4) includes a piezoelectric ceramic sheet (41), and a positive conductive column (42) and a negative conductive column (43) are provided on the pump body (2). The piezoelectric ceramic sheet (41) is mounted on the inner wall of the pump body (2), and the positive and negative electrodes of the piezoelectric ceramic sheet (41) are respectively in contact with the positive conductive column (42) and the negative conductive column (43). One end of the positive conductive column (42) and the negative conductive column (43) away from the piezoelectric ceramic sheet (41) is electrically connected to the driving component (3) through a conductive wire. The piezoelectric ceramic sheet (41), the positive conductive column (42) and the negative conductive column (43) are all located in a sealed space formed between the sheath (27) and the pump body (2).

3. An energy-saving double-shell centrifugal slurry pump according to claim 2, characterized in that: An installation groove (224) for placing the piezoelectric ceramic sheet (41) is provided on the inner wall of the pump body (2), an elastic pad (44) is provided in the installation groove (224), a ceramic end of the piezoelectric ceramic sheet (41) abuts against the elastic pad (44), and the ceramic end of the piezoelectric ceramic sheet (41) is electrically connected to the negative electrode conductive column (43) via a conductive wire.

4. The energy-saving double-shell centrifugal slurry pump according to claim 3 is characterized in that: A rubber ring (45) is sleeved on the periphery of the piezoelectric ceramic sheet (41), and the rubber ring (45) is pressed tightly against the groove wall of the installation groove (224).

5. An energy-saving double-shell centrifugal slurry pump according to any one of claim 4, characterized in that: A plurality of the piezoelectric ceramic sheets (41) are provided, and the plurality of piezoelectric ceramic sheets (41) are arranged at intervals around the axis of the pump body (2), and a plurality of corresponding positive electrode conductive columns (42), negative electrode conductive columns (43), mounting grooves (224) and elastic pads (44) are provided.

6. The energy-saving double-shell centrifugal slurry pump according to claim 5, characterized in that: The pump body (2) comprises an outer pump shell (21) and an outer pump shell (21), an end spacing is left between the inner peripheral wall of the outer pump shell (21) and the outer peripheral wall of the inner pump shell (22), the piezoelectric ceramic sheet (41) is mounted on the inner peripheral wall of the inner pump shell (22), and the sheath (27) and the inner pump shell (22) form a sealed space, the ends of the positive conductive column (42) and the negative conductive column (43) away from the piezoelectric ceramic sheet (41) both extend to the outer peripheral wall of the inner pump shell (22), the outer peripheral wall of the outer pump shell (21) is connected to a conductive wire tube (6), and the end of the conductive wire tube (6) away from the outer pump shell (21) is connected to the drive assembly (3).

7. An energy-saving double-shell centrifugal slurry pump according to claim 6, characterized in that: The conductive wire tube (6) is provided with a detection component (7), and the detection component (7) is used to detect whether each piezoelectric ceramic sheet (41) and the corresponding conductive wire are in a normal working state.

8. The energy-saving double-shell centrifugal slurry pump according to claim 7, characterized in that: The detection assembly (7) comprises a plurality of detection lights (71), the detection lights (71) being mounted on the conductive wire tube (6), and the plurality of detection lights (71) corresponding one-to-one to a plurality of piezoelectric ceramic sheets (41), and the detection lights (71) being electrically connected to the conductive wires on the corresponding piezoelectric ceramic sheets (41).

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