CN115898896B - Multistage cutting's cutting pump - Google Patents

Abstract

The application relates to a multistage cutting pump which comprises a motor and a pump body, wherein an impeller is arranged in the pump body, a rotating shaft is connected to an output shaft of the motor, the rotating shaft stretches into the pump body and is connected with the impeller, a water inlet and a water outlet are formed in the pump body, a cutting disc is arranged at the water inlet of the pump body, a water passing channel is formed in the cutting disc, a rotary cutter is arranged outside the cutting disc, the rotary cutter is fixedly connected with the lower end of the rotating shaft, a convex cutting surface is arranged on the inner surface of the pump body around the water inlet, and the lower surface of the impeller is attached to the convex cutting surface. According to the application, the cutting disc and the rotary cutter can carry out first-stage cutting on impurities, the convex cutting surface and the impeller are matched to carry out second-stage tearing cutting on the impurities, through the two-stage cutting effect, impurity particles can be thinned, the adhesion of the impurity particles is reduced, and the influence on the working efficiency of the cutting pump is avoided.

Description

Multistage cutting's cutting pump

Technical Field

The application relates to the technical field of water pumps, in particular to a multistage cutting pump.

Background

The cutting pump is one of the blowdown water pumps, and compared with the common blowdown pump, the cutting pump has a plurality of different structures, and the bottom of the cutting pump is provided with a group of high-strength cutting impellers, so that sundries such as fibers, branches and the like can be easily cut up, and the cutting pump is widely applied to industry, agriculture and daily life.

At present, chinese patent with bulletin number CN203670228U discloses a cutting pump, including the body and establish the pump body at the body downside, the axial has linked firmly the pivot on the body and can drive pivot pivoted motor, the lower extreme of pivot stretches out the body and the lower extreme of pivot has linked firmly the impeller, and the impeller is located the pump body, and the pump body has into water end and play water end, the cutting dish that has the water channel has been linked firmly to the water end department, and the outside of cutting dish is equipped with rotatory cutter, rotatory cutter with the lower extreme of pivot links firmly mutually.

For the technical scheme, the inventor finds that the rotary cutter can cut off sundries such as branches, but when facing sundries such as plastic bags, the sundries are sent into the pump body without being cut well and wound on the impeller, so that the working efficiency of the cutting pump is affected, and therefore, certain improvement exists.

Disclosure of Invention

In order to improve the working efficiency of the cutting pump, the application provides a multi-stage cutting pump.

The application provides a multistage cutting pump which adopts the following technical scheme:

The utility model provides a multistage cutting's cutting pump, includes motor and the pump body, be provided with the impeller in the pump body, be connected with the pivot on the output shaft of motor, the pivot stretches into in the pump body with the impeller links to each other, have water inlet and delivery port on the pump body, the pump body is provided with the cutting dish in water inlet department, have the water channel on the cutting dish, the cutting dish is provided with rotatory cutter outward, rotatory cutter with the lower extreme fixed connection of pivot, the internal surface of the pump body is provided with protruding cutting plane around the water inlet, the lower surface of impeller with protruding cutting plane laminating mutually.

Optionally, the pump body includes the pump main part and connects pump cover on the pump main part, the water inlet sets up on the pump cover, the cutting dish sets up the water inlet outside of pump cover, protruding cutting surface sets up the internal surface of pump cover and around the water inlet sets up.

Optionally, the convex cutting surface is spirally arranged, and the spiral convex cutting surface is gradually outwards diffused by taking the water inlet as the center.

Optionally, a plurality of notch grooves are formed in the spiral protruding cutting surface, and the notch grooves are circumferentially equidistant with the water inlet as the center.

Optionally, the motor includes the shell and connects the end cover at shell axial tip, be provided with stator and rotor in the shell, the shell intussuseption is filled with insulating oil, be provided with on the end cover respectively towards the interior mount pad of shell inner chamber and towards the outer mount pad of pump body inner chamber, set gradually installation bearing and first mechanical seal on the interior mount pad, be provided with second mechanical seal on the outer mount pad, the pivot passes second mechanical seal, first mechanical seal and installation bearing respectively and connects on the rotor.

Optionally, the impeller includes upper blade and sets up a plurality of streamlined blades on the upper blade, forms between the adjacent blade and gets rid of the liquid passageway, get rid of the liquid passageway with the water inlet communicates with each other, the lower surface of blade with protruding cutting surface's upper surface laminating mutually.

Optionally, a flushing runner is formed in the blade, the flushing runner is communicated with the lower surface of the blade, a conveying runner communicated with the flushing runner is formed in the upper blade plate, a connecting shaft extending upwards is arranged in the middle of the upper blade plate, an introducing runner communicated with the conveying runner is formed in the side wall of the connecting shaft, and a water delivery assembly communicated with the introducing runner is arranged on the inner wall of the end cover facing the inner cavity of the pump body.

Optionally, the water delivery assembly includes a pressurization section of thick bamboo, be provided with water intaking valve and outlet valve on the pressurization section of thick bamboo, the outlet valve passes through the pipe connection on the introduction runner, be provided with the piston in the pressurization section of thick bamboo, the piston passes through linkage assembly and connects in the pivot, the pivot is used for providing the drive power of piston reciprocating motion.

Optionally, the linkage assembly includes bent axle section and gangbar, bent axle section sets up in the pivot, the one end of gangbar articulates on the bent axle section, the other end of gangbar articulates on the piston.

Optionally, a fixing support is arranged on the inner wall of the end cover facing the inner cavity of the pump body, a sealing collar is arranged on the fixing support, the sealing collar is sleeved on the connecting shaft and covers the introducing flow passage, a circulation groove is formed in the inner annular wall of the sealing collar, the circulation groove is communicated with the introducing flow passage, and the guide pipe is connected to the sealing collar and is communicated with the circulation groove.

In summary, the present application includes at least one of the following beneficial technical effects:

1. According to the application, the cutting disc and the rotary cutter can carry out first-stage cutting on impurities, the convex cutting surface and the impeller are matched to carry out second-stage tearing cutting on the impurities, through the two-stage cutting effect, impurity particles can be thinned, the adhesion of the impurity particles is reduced, and the influence on the working efficiency of the cutting pump is avoided.

2. According to the application, the first mechanical seal on the end cover is lubricated by the insulating oil, and the second mechanical seal is lubricated by the water body in the pump body, and by the arrangement of the end cover structure, the assembly parts of the cutting pump can be reduced, so that the assembly efficiency of the cutting pump is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of a multistage cutting pump.

Fig. 2 is a schematic cross-sectional view of a multi-stage cutting pump.

Fig. 3 is an exploded schematic view of a multistage cutting pump.

Fig. 4 is a schematic structural view of the pump cap.

FIG. 5 is a schematic diagram of the installation of a water delivery assembly in a second embodiment.

Fig. 6 is a schematic structural view of an impeller in the second embodiment.

Reference numerals illustrate: 1. a motor; 101. a housing; 102. an end cap; 103. a stator; 104. a rotor; 105. mounting a bearing; 106. a first mechanical seal; 107. a second mechanical seal; 2. a pump body; 201. a pump body; 202. a pump cover; 3. an impeller; 301. an upper blade; 302. a blade; 303. a liquid throwing channel; 4. a rotating shaft; 5. a water inlet; 6. a water outlet; 7. a cutting disc; 8. a water passing channel; 9. rotating the cutter; 10. a convex cutting surface; 11. a notch groove; 12. a support leg; 13. flushing the flow channel; 14. a delivery flow path; 15. a connecting shaft; 16. introducing a runner; 17. a water delivery assembly; 171. a pressurizing cylinder; 172. a water inlet valve; 173. a water outlet valve; 174. a conduit; 175. a piston; 176. a linkage assembly; 1761. a crankshaft section; 1762. a linkage rod; 177. a fixed bracket; 178. a sealing collar; 179. a flow channel.

Detailed Description

The application is described in further detail below with reference to fig. 1-6.

Example 1

The utility model provides a multistage cutting's cutting pump, refer to fig. 1 and 2 and show, including motor 1 and pump body 2, pump body 2 connects on motor 1, is provided with impeller 3 in the pump body 2, is connected with pivot 4 on motor 1's the output shaft, in the pivot 4 stretches into pump body 2 link to each other with impeller 3, is provided with water inlet 5 and delivery port 6 on the pump body 2, and motor 1 drives impeller 3 rotation, and impeller 3 is inhaled water from water inlet 5 in pump body 2 and is discharged from delivery port 6.

Referring to fig. 2, the motor 1 includes a housing 101 and an end cap 102 connected to an axial end of the housing 101, the end cap 102 is connected to the axial end of the housing 101 by a flange structure, the pump body 2 is connected to the end cap 102 by a flange structure, and a seal ring is provided between the end cap 102 and the housing 101 to ensure connection tightness between the end cap 102 and the housing 101. A stator 103 and a rotor 104 are arranged in the shell 101, one end of the rotor 104 is arranged on the inner wall of the shell 101 through a bearing, and the rotating shaft 4 is connected to the other end of the rotor 104 through the end cover 102.

In the application, the motor 1 adopts the oil immersed motor 1, and insulating oil is filled in the shell 101, so that the insulating oil can cool the stator 103 and the rotor 104. Wherein, in order to ensure the connection leakproofness between end cover 102 and the pivot 4, be provided with respectively towards the interior mount pad of shell 101 inner chamber and towards the outer mount pad of pump body 2 inner chamber on the end cover 102, install bearing 105 and first mechanical seal 106 have been set gradually on the interior mount pad, be provided with second mechanical seal 107 on the outer mount pad, pivot 4 passes second mechanical seal 107 respectively, first mechanical seal 106 and install bearing 105 and connect on rotor 104, insulating oil can lubricate first mechanical seal 106, the water in the pump body 2 can lubricate second mechanical seal 107, the assembly spare part of cutting pump has effectively been reduced to above-mentioned end cover 102 structure, improve the assembly efficiency of cutting pump.

Referring to fig. 2 and 3, the pump body 2 is provided with a cutting disc 7 at the water inlet 5, a water passing channel 8 is arranged on the cutting disc 7, a rotary cutter 9 is arranged outside the cutting disc 7, and the rotary cutter 9 is fixedly connected with the lower end of the rotating shaft 4. Wherein, the inner surface of the pump body 2 is provided with a convex cutting surface 10 around the water inlet 5, and the lower surface of the impeller 3 is attached to the convex cutting surface 10.

Specifically, the pump body 2 includes the pump main part 201 and connects the pump cover 202 on the pump main part 201, and the water inlet 5 sets up on the pump cover 202, and the cutting dish 7 sets up in the water inlet 5 outside of pump cover 202, and the cutting dish 7 passes through flange structure to be fixed on the pump cover 202, and rotatory cutter 9 is outside the cutting dish 7, and the surface laminating of rotatory cutter 9 and the surface laminating of cutting dish 7, in this embodiment, cutting dish 7 with rotatory cutter 9 adopts the dual-phase steel material.

Referring to fig. 2 and 3, the impeller 3 includes an upper blade 301, a plurality of streamline blades 302 disposed on the upper blade 301, and a liquid-throwing channel 303 is formed between adjacent blades 302, wherein the liquid-throwing channel 303 is communicated with the water inlet 5, and the lower surfaces of the blades 302 are attached to the upper surface of the convex cutting surface 10. In one embodiment, the raised cutting surface 10 is disposed on the inner surface of the pump cap 202 and around the water inlet 5, the raised cutting surface 10 being disposed in a spiral shape, the spiral raised cutting surface 10 being disposed gradually outwardly diverging about the water inlet 5.

Through the setting of above-mentioned technical scheme, motor 1 drives impeller 3 through pivot 4 and rotates, impeller 3 is followed water and is inhaled from water inlet 5, the water gets into from the water channel 8 of cutting dish 7, pivot 4 drives rotatory cutter 9 and rotates, can cut apart the branch outside cutting dish 7, impurity such as fibre, through first order shredding process, the impurity will enter into impeller 3's the liquid channel 303 with water inlet 5, because contain difficult plastic bag etc. of cutting up in the impurity very much, at this moment, impurity such as plastic bag passes through protruding cutting face 10, along with impeller 3's rotation, impeller 3 lower surface is laminated with protruding cutting face 10 mutually, impeller 3 lower surface and spiral protruding cutting face 10 can form the effect of rolling tearing to fibre impurity such as plastic bag, form second order shredding process, can further tear and cut impurity granularity for impurity granularity is littleer, thereby avoid appearing impurity winding on impeller 3's condition, in order to avoid influencing the work efficiency of cutting pump.

Referring to fig. 4, a plurality of notch grooves 11 are formed in the spiral protrusion cutting surface 10, and the plurality of notch grooves 11 are circumferentially and equally spaced around the water inlet 5, in this embodiment, four notch grooves 11 are formed. When fibrous impurities such as plastic bags enter from the water inlet 5, the notch groove 11 can play a certain role in hooking the fibrous impurities such as the plastic bags, so that the tearing and cutting effects of the impeller 3 on the impurities are improved.

Referring to fig. 4, the bottom of the pump cover 202 is provided with three legs 12, and the legs 12 are provided to maintain a sufficiently large water inlet space of the water inlet 5.

Example two

On the basis of the first embodiment, referring to fig. 5 and 6, a flushing flow channel 13 is formed in the blade 302, and the flushing flow channel 13 is communicated with the lower surface of the blade 302, in this embodiment, a plurality of flushing flow channels 13 are formed in each blade 302 or a single blade 302 or a plurality of blades 302, and can be set according to actual requirements.

The upper blade 301 is provided with a conveying flow passage 14 communicated with the flushing flow passages 13, and if a plurality of flushing flow passages 13 are provided, the conveying flow passages 14 are communicated with each flushing flow passage 13. The middle part of the upper blade 301 is provided with a connecting shaft 15 extending upwards, the side wall of the connecting shaft 15 is provided with an introducing flow passage 16 communicated with the conveying flow passage 14, and the inner wall of the end cover 102 facing the inner cavity of the pump body 2 is provided with a water delivery assembly 17 communicated with the introducing flow passage 16.

Referring to fig. 5 and 6, the water delivery assembly 17 includes a pressurizing cylinder 171, and the pressurizing cylinder 171 is fixed to the end cap 102, that is, the inner wall of the end cap 102 facing the inner cavity of the pump body 2. Wherein, the pressurizing cylinder 171 is provided with a water inlet valve 172 and a water outlet valve 173, and the water inlet valve 172 and the water outlet valve 173 adopt one-way valves. The outlet valve 173 is connected to the inlet flow passage 16 through a conduit 174, a piston 175 is disposed in the pressurizing cylinder 171, the piston 175 is connected to the rotating shaft 4 through a linkage assembly 176, and the rotating shaft 4 is used for providing a driving force for reciprocating the piston 175.

Specifically, a fixing bracket 177 is disposed on an inner wall of the end cover 102 facing the inner cavity of the pump body 2, a sealing collar 178 is disposed on the fixing bracket 177, the sealing collar 178 is sleeved on the connecting shaft 15 and covers the introducing flow channel 16, a circulation groove 179 is formed in an inner annular wall of the sealing collar 178, the circulation groove 179 is communicated with the introducing flow channel 16, and the conduit 174 is connected to the sealing collar 178 through a pipe joint and is communicated with the circulation groove 179.

The linkage assembly 176 includes a crankshaft segment 1761 and a linkage rod 1762, the crankshaft segment 1761 being disposed on the shaft 4, i.e., the shaft 4 includes a first segment coupled to the rotor 104 and a second segment coupled to the impeller 3, the crankshaft segment 1761 being disposed between the first and second segments. One end of the linkage rod 1762 is hinged to the crankshaft segment 1761 and the other end of the linkage rod 1762 is hinged to the piston 175. Thus, when the shaft 4 rotates, the rotational force of the shaft 4 can be converted into the driving force for reciprocating the piston 175 by the arrangement of the crank segment 1761.

Through the setting of above-mentioned technical scheme, the water body that is inhaled in the pump body 2 often contains impurity such as more mud, and mud is piled up in protruding cutting face 10 easily for protruding cutting face 10 tends to be leveled, makes protruding cutting face 10 can not hold the fibrous impurity and detains, and then influences impeller 3 and protruding cutting face 10 cooperation in order to tear cutting fibrous impurity.

According to the application, through the arrangement of the water delivery assembly 17, the water delivery assembly 17 can absorb water in the pump body 2 into the pressurizing cylinder 171 along with the rotation of the rotating shaft 4, the water in the pressurizing cylinder 171 is pressed into the introducing flow channel 16, passes through the introducing flow channel 16 and the conveying flow channel 14 and is further sprayed on the surface of the convex cutting surface 10 from the flushing flow channel 13, along with the rotation of the impeller 3, the streamline blades 302 pass through each spiral groove on the spiral convex cutting surface 10, so that the pressurized and sprayed water can flush sludge in each spiral groove on the convex cutting surface 10, the sludge is prevented from adhering to the convex cutting surface 10, and a good tearing and cutting effect is achieved through cooperation between the convex cutting surface 10 and the lower surfaces of the blades 302.

Wherein, the water delivery assembly fixed on the end cover can not influence the transportation of the water body in the pump body.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (6)

1. The utility model provides a multistage cutting's cutting pump, includes motor (1) and pump body (2), be provided with impeller (3) in the pump body (2), be connected with pivot (4) on the output shaft of motor (1), pivot (4) stretch into in pump body (2) with impeller (3) link to each other, have water inlet (5) and delivery port (6) on pump body (2), pump body (2) are provided with cutting dish (7) in water inlet (5) department, have water channel (8) on cutting dish (7), cutting dish (7) are provided with rotatory cutter (9) outward, rotatory cutter (9) with the lower extreme fixed connection of pivot (4), a serial communication port, the internal surface of pump body (2) is provided with protruding cutting face (10) around water inlet (5), the lower surface of impeller (3) with protruding cutting face (10) laminating mutually;

The motor (1) comprises a shell (101) and an end cover (102) connected to the axial end part of the shell (101), wherein a stator (103) and a rotor (104) are arranged in the shell (101), insulating oil is filled in the shell (101), an inner mounting seat facing the inner cavity of the shell (101) and an outer mounting seat facing the inner cavity of the pump body (2) are arranged on the end cover (102), a mounting bearing (105) and a first mechanical seal (106) are sequentially arranged on the inner mounting seat, a second mechanical seal (107) is arranged on the outer mounting seat, and the rotating shaft (4) respectively penetrates through the second mechanical seal (107), the first mechanical seal (106) and the mounting bearing (105) to be connected to the rotor (104);

The impeller (3) comprises an upper blade plate (301) and a plurality of streamline blades (302) arranged on the upper blade plate (301), a liquid throwing channel (303) is formed between every two adjacent blades (302), the liquid throwing channel (303) is communicated with the water inlet (5), and the lower surface of each blade (302) is attached to the upper surface of the corresponding convex cutting surface (10);

A flushing runner (13) is arranged in the blade (302), the flushing runner (13) is communicated with the lower surface of the blade (302), a conveying runner (14) communicated with the flushing runner (13) is arranged in the upper blade plate (301), a connecting shaft (15) extending upwards is arranged in the middle of the upper blade plate (301), an introducing runner (16) communicated with the conveying runner (14) is arranged on the side wall of the connecting shaft (15), and a water delivery assembly (17) communicated with the introducing runner (16) is arranged on the inner wall of the end cover (102) facing the inner cavity of the pump body (2);

the water delivery assembly (17) comprises a pressurizing cylinder (171), a water inlet valve (172) and a water outlet valve (173) are arranged on the pressurizing cylinder (171),

The water outlet valve (173) is connected to the introducing flow passage (16) through a conduit (174), a piston (175) is arranged in the pressurizing cylinder (171), the piston (175) is connected to the rotating shaft (4) through a linkage assembly (176), and the rotating shaft (4) is used for providing driving force for reciprocating movement of the piston (175).

2. A multistage-cutting pump according to claim 1, characterized in that the pump body (2) comprises a pump body (201) and a pump cover (202) connected to the pump body (201), the water inlet (5) is provided on the pump cover (202), the cutting disc (7) is provided outside the water inlet (5) of the pump cover (202), and the raised cutting surface (10) is provided on the inner surface of the pump cover (202) and around the water inlet (5).

3. A multistage-cutting pump according to claim 1, characterized in that the raised cutting surfaces (10) are arranged in a spiral shape, the spiral-shaped raised cutting surfaces (10) being arranged gradually outwards diverging with the water inlet (5) as a center.

4. A multistage-cutting pump according to claim 3, characterized in that a plurality of notch grooves (11) are provided on the spiral-shaped convex cutting surface (10), and the notch grooves (11) are circumferentially equally spaced about the water inlet (5).

5. The multi-stage cutting pump as defined in claim 1, wherein the linkage assembly (176) comprises a crankshaft segment (1761) and a linkage rod (1762), the crankshaft segment (1761) being disposed on the shaft (4), one end of the linkage rod (1762) being hinged to the crankshaft segment (1761), the other end of the linkage rod (1762) being hinged to the piston (175).

6. The multistage cutting pump according to claim 1, wherein a fixing bracket (177) is arranged on the inner wall of the end cover (102) facing the inner cavity of the pump body (2), a sealing collar (178) is arranged on the fixing bracket (177), the sealing collar (178) is sleeved on the connecting shaft (15) and covers the introducing flow channel (16), a circulation groove (179) is formed in the inner annular wall of the sealing collar (178), the circulation groove (179) is communicated with the introducing flow channel (16), and the guide pipe (174) is connected to the sealing collar (178) and is communicated with the circulation groove (179).