CN115444343A - Assembly structure and cleaning machine of open water pump - Google Patents

Abstract

The invention relates to an assembly structure of an open water pump and a cleaning machine, wherein a cover plate is transversely arranged in the middle of a volute, the edge of the cover plate is arranged close to the inner wall of the volute, the inner cavity of the volute is divided into an upper cavity and a lower cavity, the bottom edge of a guide vane is supported on the bottom wall in the volute, a semi-surrounding structure formed by the guide vane is arranged close to the inner wall of the volute opposite to a second water outlet and is detachably connected with the inner wall of the volute, and the second water distribution opening is close to the inner wall of the volute and is communicated with the upper cavity. The semi-surrounding structure formed by the guide vanes is offset relative to the center of the cover plate, and the offset structure is matched with the spiral structure of the guide vanes to jointly pressurize water flow, so that energy loss is reduced, and the water flow pressure meets the water pumping requirement on the basis of simplifying the structure of the water pump; during assembly, the circumferential constraint position of the cover plate in the volute can be used for controlling the size of a communication area of the first water distribution port and the second water outlet, so that the size of each strand of water flow after distribution can be regulated and controlled, and the special cleaning requirement of a user can be met.

Description

Assembly structure and cleaning machine of open water pump

Technical Field

The invention relates to the technical field of dish washing machines, in particular to an assembly structure of an open type water pump and a cleaning machine.

Background

For dishwashers with large volumes, at least two groups of spray arms arranged one above the other are generally provided in order to achieve a better washing result. During operation, the washing pump respectively carries water to each spray arm and sprays from top to bottom, and the water that falls back after washing the tableware gathers in the drinking cup of dish washer bottom, and the washing pump carries the water that falls back once more in each spray arm, accomplishes a rivers circulation.

For example, chinese patent application publication No. CN106859563A, energy saving dishwasher (application No. CN 201611232345.5), discloses a structure including a cavity for receiving dishes and providing a washing space, a spray system for spraying water to wash the dishes, and a pump body for pumping water and supplying water to the spray system; the spraying system is arranged in the cavity; the water pumping end of the pump body is communicated with the cavity, and the water supply end is communicated with the spraying system; the spraying system comprises an inner water pipe and more than two sets of spraying devices, and the more than two sets of spraying devices are respectively arranged on the inner water pipe; the water supply end of the pump body is connected with a water distribution device, the water distribution device is provided with more than two water outlets corresponding to more than two sets of spraying devices, and the spraying devices are communicated with the corresponding water outlets; when the spraying device works, the water distribution device conducts more than one water outlet according to the instruction, so that more than one set of spraying device can perform cleaning work.

In the above-mentioned current dish washer that can carry out bottom and spray, top sprays, a pump for supplying water for the spraying system generally adopts closed structure, is about to locate the spiral case of washing pump in the box below, is provided with ability pivoted impeller in the spiral case, and the water inlet of washing pump spiral case is linked together bottom the washing chamber, and the delivery port of spiral case is connected with the water diversion device, and this water diversion device divides into the first branch road of supplying water to bottom spray arm and the second branch road of supplying water to top spray arm with rivers. Because the water pressure of the top spraying water and the bottom spraying water is independently supplied by the washing pump, the lift, the flow and the impact force of the water flow on each branch are greatly reduced after the water flow is divided, and the cleaning effect is influenced.

In order to solve the above problems, the applicant's prior patent ZL 202023348766.9 "a dual pump system and a cleaning machine using the dual pump system" discloses a structure, in which the dual pump system includes an upper impeller, a lower impeller, an upper housing, a lower housing and a driving member, the upper housing has a first receiving chamber for mounting the upper portion of a first blade, the upper portion of the lower housing has a second receiving chamber for mounting the lower portion of the first blade, a first water inlet for supplying water into the second receiving chamber is formed on the sidewall of the lower housing, a third receiving chamber for mounting the lower impeller is formed on the lower portion of the lower housing, and a second water inlet and a water outlet are formed on the sidewall and/or bottom wall of the lower housing. The double-pump system is an open system, the second accommodating cavity, the first accommodating cavity and the upper impeller are used for spraying water at the bottom, the third accommodating cavity and the lower impeller are used for spraying water at the top and/or the middle, and the power of the two paths of water flow is independently supplied by the corresponding pumps, so that the lift and the water flow of each path of water flow are improved, and the cleaning effect is favorably improved.

However, because the independent upper impeller is adopted for bottom layer water supply and the independent lower impeller is adopted for upper layer water supply, the whole structure is relatively complex, the production cost is high, the water pumping effect cannot be considered on the basis of saving the cost, and meanwhile, the water quantity of the bottom layer water supply and the upper layer water supply is difficult to be reasonably distributed.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide an assembly structure of an open water pump, which can regulate and control the flow of each strand of water after being divided according to production requirements so as to meet corresponding cleaning requirements, aiming at the current situation of the prior art.

The second technical problem to be solved by the present invention is to provide an assembly structure of an open water pump, which can simplify the structure and improve the water pumping effect, in view of the current situation of the prior art.

The third technical problem to be solved by the present invention is to provide a cleaning machine applying the assembly structure of the open water pump in view of the current state of the prior art.

The technical scheme adopted by the invention for solving at least one technical problem is as follows:

an assembly structure of an open water pump comprises a volute and a space guide vane arranged in the volute;

the bottom of the volute is provided with a water suction port, the top of the volute is provided with a first water outlet, and the side part of the volute is provided with a second water outlet;

the space guide vane comprises a cover plate and guide vanes, the cover plate is disc-shaped, at least two guide vanes are vertically arranged on the lower surface of the cover plate, each guide vane spirally extends along the circumferential direction on the edge of the cover plate and forms a semi-surrounding structure, a first water distributing opening is formed at the opening of the semi-surrounding structure, and a second water distributing opening is partially and alternately surrounded between every two adjacent guide vanes;

the cover plate is transversely arranged in the middle of the volute, the edge of the cover plate is close to the inner wall of the volute to be arranged, the inner cavity of the volute is divided into an upper cavity and a lower cavity, the first water outlet is located at the top of the upper cavity, the second water outlet is located at the side part of the lower cavity, the bottom edge of the guide vane is supported on the inner bottom wall of the volute, a semi-surrounding structure formed by the guide vane is close to the inner wall of the volute opposite to the second water outlet to be arranged and is connected with the inner wall of the volute in a detachable mode, and the second water dividing port is close to the position of the inner wall of the volute and is communicated with the upper cavity.

Preferably, the semi-surrounding structure and the area inside the inner wall of the volute form a functional area capable of performing bidirectional flow splitting and pressurization, and the functional area is offset relative to the center of the volute. By adopting the structure, the offset structure is matched with the spiral structure of the guide vane to pressurize water flow together, so that the pressurizing effect is further improved, the energy loss is reduced, and the water flow pressure meets the water pumping requirement on the basis of simplifying the structure of the water pump.

In order to facilitate assembly, a clamping groove extending up and down is formed in the inner wall of the volute, and correspondingly, a convex rib capable of being matched and clamped with the clamping groove is arranged on the outer peripheral surface of the guide vane.

Preferably, the cross section width of the convex rib is gradually reduced from the outer surface of the guide vane outwards, and the shape of the clamping groove is matched with that of the convex rib.

Preferably, the width of the upper part of the clamping groove is larger than that of the lower part, and the side wall of the upper part of the clamping groove is smoothly transited with the side wall of the lower part. The smooth transition can be a smooth curved surface with gradual transition or a transition inclined surface. The upper part width is big, the installation of being convenient for, and the lower part width is little, mainly plays locking positioning action.

In the invention, the offset of the first water dividing port relative to the second water outlet in the circumferential direction is used for controlling the water flow divided by the first water dividing port and the second water dividing port. The starting end of the guide vane close to the second water outlet is used for separating water flow along the circumferential flow direction of the water flow in the volute, namely one water flow is divided into two parts, some dish-washing machine users are used to mainly adopt the spraying part of the first water outlet to wash tableware and have low utilization rate of the spraying part of the second water outlet, some dish-washing machine users have higher utilization rates of the spraying parts of the first water outlet and the second water outlet, and can adjust the water flow of the first water outlet and the second water outlet according to requirements.

And a diversion port for enabling water at the second water diversion port to upwards enter the upper cavity is formed at the joint of every two adjacent diversion blades so as to upwards convey water shunted by the second water diversion port.

Preferably, the upper surface of the cover plate is provided with a baffle plate extending upwards, the top of the baffle plate abuts against the inner top wall and the inner side wall of the volute, the baffle plate and the inner wall of the volute jointly enclose a confluence flow channel for gathering water guided upwards through the flow guide opening, and the confluence flow channel is provided with an opening arranged towards the first water outlet. The structure can rectify and collect the upward water to reduce energy loss and improve water pressure.

The open type water pump also comprises a centrifugal impeller and a driving piece, wherein the centrifugal impeller can be rotatably arranged in the lower cavity and in the semi-surrounding structure, the driving piece is arranged below the volute, and the output shaft upwards penetrates through the water suction port to be connected with the centrifugal impeller. The driving piece drives the centrifugal impeller to rotate, and water pumping can be realized.

Preferably, the central part of the lower surface of the cover plate is provided with a yielding groove arranged corresponding to the output shaft of the driving piece. Because the invention is an open water pump, assembly gaps exist among the driving piece, the box body and the centrifugal impeller, the problem that the centrifugal impeller and the output shaft can move up and down is caused, and the abdicating groove is arranged to eliminate interference in the moving process.

Preferably, the height of the centrifugal impeller is b2, and the distance between the lower surface of the cover plate and the inner bottom wall of the volute casing is b3, b3= (1.15-1.25) b2. The structure can improve the water pumping efficiency on the basis of considering the up-and-down movement displacement of the centrifugal impeller.

The utility model provides a cleaning machine, includes box, bottom spray arm and top spray arm, still includes the assembly structure of above-mentioned open water pump, the bottom half is provided with recessed return water region, and the top in this return water region covers there is the filter, the return water region is located to the spiral case, the clearance of absorbing water has between the water sucking mouth of spiral case bottom and the return water region bottom, the first delivery port at spiral case top is located on the filter and is linked together with the water inlet of bottom spray arm, the top spray arm is located upper portion and is linked together through the second delivery port of water supply line with the spiral case in the box.

Compared with the prior art, the invention has the advantages that: in the circumferential flowing process of the water flow, the water flow is divided into two parts through the first water dividing opening and the second water dividing opening respectively, a semi-enclosed structure formed by the guide vanes is offset relative to the center of the cover plate, and the offset structure is matched with the spiral structure of the guide vanes to pressurize the water flow together, so that the pressurizing effect is further improved, the energy loss is reduced, and the water flow pressure meets the water pumping requirement on the basis of simplifying the water pump structure; during assembly, the circumferential constraint position of the cover plate in the volute can be used for controlling the size of the communication area of the first water distribution port and the second water distribution port, so that the size of each strand of water flow after distribution can be regulated and controlled, and the special cleaning requirement of a user can be met.

Drawings

FIG. 1 is a schematic partial structural view of an open water pump according to an embodiment of the present invention (with a hidden driving member);

FIG. 2 is a schematic bottom view of FIG. 1;

FIG. 3 is a first cross-sectional view of FIG. 1;

FIG. 4 is a second cross-sectional view of FIG. 1;

FIG. 5 is a schematic structural view of a space vane in an embodiment of the present invention;

FIG. 6 is a schematic view of the structure of FIG. 5 at another angle;

FIG. 7 is a schematic view of a partial structure of a volute according to an embodiment of the present invention;

FIG. 8 is a bottom cross-sectional view of an open water pump in an embodiment of the present invention;

FIG. 9 is a schematic view of a part of the structure of the cleaning machine according to the embodiment of the present invention;

fig. 10 is a schematic structural diagram of a cleaning machine according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the following examples of the drawings.

As shown in fig. 1 to 10, the open water pump in this embodiment includes a volute 1, a space guide vane 2, a centrifugal impeller 3, and a driving member 8, and an assembly structure of the open water pump mainly emphasizes an assembly structure and a positional relationship between the space guide vane and the volute, and a positional relationship between the space guide vane and the centrifugal impeller.

The main body part of the volute 1 of the embodiment is cylindrical, the bottom of the volute is provided with a water suction port 13, the top of the volute 1 is provided with a first water outlet 11, and the side part of the volute is provided with a second water outlet 12. The space guide vane 2 is arranged in the volute 1. The space guide vane 2 comprises a cover plate 21 and guide vanes 22, the cover plate 21 is disc-shaped, the guide vanes 22 are at least two and are vertically arranged on the lower surface of the cover plate 21, each guide vane 22 extends along the circumferential spiral on the edge of the cover plate 21 and forms a semi-surrounding structure A, a first water distributing opening 201 is formed at the opening of the semi-surrounding structure A, and a second water distributing opening 202 is partially enclosed in a staggered manner between every two adjacent guide vanes 22. The cover plate 21 is transversely arranged in the middle of the volute 1, the edge of the cover plate is arranged close to the inner wall of the volute 1, the inner cavity of the volute 1 is divided into an upper cavity 101 and a lower cavity 102, the first water outlet 11 is positioned at the top of the upper cavity 101, and the second water outlet 102 is positioned at the side of the lower cavity 102. The centrifugal impeller 3 can be rotatably arranged in the lower cavity 102 and in the semi-surrounding structure A, the driving part 8 is a motor and is arranged below the volute 1, and the output shaft 81 upwards penetrates through the water suction port 13 to be connected with the centrifugal impeller 3. The driving piece 8 drives the centrifugal impeller 3 to rotate, and water pumping can be realized.

The bottom edge of the guide vane 22 is supported on the inner bottom wall of the volute 1, and a semi-enclosed structure a formed by the guide vane 22 is arranged close to the inner wall of the volute 1 opposite to the second water outlet 202 and is detachably connected with the inner wall of the volute 1. A diversion port 203 for water of the second diversion port 202 to enter the upper cavity 101 upwards is formed at the joint of the two adjacent diversion blades 22, and the second diversion port 202 is close to the inner wall of the volute 1 and communicated with the upper cavity 101 through the diversion port 203 so as to convey water diverted by the second diversion port 202 upwards.

The semi-surrounding structure A and the area inside the inner wall of the volute 1 form a functional area B which can perform bidirectional flow dividing and pressurizing on water flow, and the functional area B is offset relative to the center of the volute 1. By adopting the structure, the bias structure is matched with the spiral structure of the guide vane 22 to pressurize water flow together, so that the pressurizing effect is further improved, the energy loss is reduced, and the water flow pressure meets the water pumping requirement on the basis of simplifying the structure of the water pump.

In this embodiment, for the convenience of assembly, the inner wall of the volute 1 is provided with a slot 14 extending up and down, and correspondingly, the outer circumferential surface of the guide vane 22 is provided with a rib 224 capable of being engaged with the slot 14. The cross section width of the rib 224 is gradually reduced from the outer surface of the guide vane 22 to the outside, and the shape of the slot 14 is matched with the rib 224. The width of the upper part of the clamping groove 14 is larger than that of the lower part, the side wall of the upper part of the clamping groove 14 and the side wall of the lower part are in smooth transition, the smooth transition can be a gradually-transitional smooth curved surface or a transitional inclined surface, the width of the upper part is large, the installation is convenient, the width of the lower part is small, and the locking and positioning effects are mainly achieved.

In the present embodiment, the offset amount of the first water dividing port 201 in the circumferential direction with respect to the second water outlet 12 is used to control the flow rate of water divided by the first water dividing port 201 and the second water dividing port 202. Along the circumferential flow direction of water flow in the volute 1, the starting end of the guide vane 22 close to the second water outlet 12 is used for separating water flow, namely, one water flow is divided into two parts, some dishwasher users are used to mainly adopt the spraying part of the first water outlet 11 to clean tableware, the utilization rate of the spraying part of the second water outlet 12 is low, some dishwasher users have higher utilization rates of the spraying parts of the first water outlet 11 and the second water outlet 12, and the water flow of the first water outlet 11 and the second water outlet 12 can be adjusted according to requirements, for example, the cover plate 21 is rotated, when the communication area between the first water dividing port 201 and the second water outlet 11 is larger, the water flow output through the second water outlet 12 is larger, and the water flow output through the first water outlet 11 is smaller, and vice versa.

The cover plate 21 has a recess 211 formed in the center of the lower surface thereof and corresponding to the output shaft 81 of the driving member 8. Since the present embodiment is an open water pump, there is an assembly gap between the driving member 8 and the box body and between the driving member and the centrifugal impeller 3, which may cause a problem that the centrifugal impeller 3 and the output shaft 81 may move up and down, and the above-mentioned relief groove 211 is provided to eliminate interference in the moving process.

The height of the centrifugal impeller 3 in this embodiment is b2, and the distance between the lower surface of the shroud 21 and the inner bottom wall of the scroll casing 1 is b3, b3= (1.15 to 1.25) b2. The structure can improve the water pumping efficiency on the basis of considering the up-and-down movement displacement of the centrifugal impeller 3.

In the present embodiment, in the flow direction of the water flow in the circumferential direction, the starting end of the guide vane 22 is located inside the edge of the cover plate 21, and a flow dividing structure 2211 for dividing the water flow into the functional area B or into the first water dividing opening 201 is formed; the ends of the guide vanes 22 are located on the outer circumference of the cover plate 21. In the assembled state, the edge of the cover plate 21 is tightly attached to the inner wall surface of the water pump volute to form a seal, and only the second water diversion opening 202 is partially opened to allow water to flow through the second water diversion opening 202 and be conveyed upwards. The flow dividing structure is favorable for improving the water dividing effect and reducing energy loss, and the tail end of the guide vane 22 is positioned on the outer circumference of the cover plate 21, so that the assembly tightness between the space guide vane 2 and the water pump volute can be improved, water is prevented from being drained, and the water flow is ensured to have higher water pressure and lift.

Specifically, the projection of the outer side wall of the guide vane 22 on the horizontal plane is located on the outer circumference of the cover plate 21, and the distance from the inner side wall of the guide vane 22 to the center of the cover plate 21 gradually increases along the water flow direction to form a pressurizing curved surface 220 for pressurizing water to be pumped out through the second water diversion port 202. The pressurized curved surface 220 can pressurize the water flow to increase the pressure and lift of the output water flow and improve the cleaning effect.

The guide vane 22 of this embodiment includes a first guide vane 221, a second guide vane 222, and a third guide vane 223, along the flow direction of the water flow in the circumferential direction, the starting end of the first guide vane 221 forms a diversion structure 2211, the end of the first guide vane is located at the outer edge of the cover plate 21 and is used for constraining the corresponding second water distribution opening 202, the starting end of the second guide vane 222 is used for constraining the corresponding second water distribution opening 202, and the end of the second guide vane is located on the outer circumference of the cover plate 21. The third guide vane 223 is located between the first guide vane 221 and the second guide vane 222, and the second water diversion port 202 is respectively constrained between the starting end of the third guide vane 223 and the end of the first guide vane 221, and between the end of the third guide vane 223 and the starting end of the second guide vane 222. The distance from the starting end of the first baffle 221 to the center of the cover plate 21 is less than the distance from the starting end of the second baffle 222 to the center of the cover plate 21, which is favorable for improving the water diversion effect and reducing the energy loss. The joint of two adjacent guide vanes 22 is formed with a guide opening 203 for the water of the second water diversion opening 202 to enter the cover plate 21 upwards, so as to convey the water upwards according to the requirement. The guide vane has the following functions: (1) The first guide vane 221, the second guide vane 222 and the third guide vane 223 cooperate to pressurize water flow in all the water pump volutes in the circumferential direction; (2) The starting end of the first flow deflector 221 is used for circumferentially dividing water, so that a part of water is output through the first water dividing port 201, the other part of water continuously flows circumferentially in the functional area, and most of the part of water is output through the second water dividing port 202; (3) Since each guide vane 22 extends spirally, the inner circumferential wall of the second guide vane 202 pressurizes the water to be output through the first water diversion opening 201; (4) The first guide vane 221, the second guide vane 222 and the third guide vane 223 enclose the two guide openings 203 together, and the two guide openings 203 are circumferentially arranged at intervals along the water flow direction, so that the water flow interference and the energy loss are reduced, and the water pressure of the water flow output through the second water diversion opening 202 is improved.

In this embodiment, the upper surface of the cover plate 21 is provided with a baffle 23 extending upward, the top of the baffle 23 abuts against the inner top wall and the inner side wall of the volute 1, the baffle 23 and the inner wall of the volute 1 together enclose a converging flow channel 230 for collecting the water guided upward through the flow guiding opening 203, and the converging flow channel 230 has an opening arranged upward. The baffle 23 includes an arc 231 located at the center of the cover plate 21, a first curved section 232 extending smoothly from the first end of the arc 231 to the first edge of the flow guide opening 203, and a second curved section 233 extending smoothly from the second end of the arc 231 to the second edge of the flow guide opening 203. The structure can rectify and collect the upward water to reduce energy loss and improve water pressure. Because the water conservancy diversion mouth 203 of this embodiment is two sets of and at apron 21 interval arrangement in circumference, baffle 23 still includes the third curved surface section 234 of locating between first curved surface section 232 and second curved surface section 233, this third curved surface section 234 is used for separating the runner 230 that converges into and becomes the subchannel that corresponds different water conservancy diversion mouths 203 respectively, the outer end of third curved surface section 234 links up with the guide vane 22 top between two water conservancy diversion mouths 203 mutually, the inner is close to the opening department of circular arc section 231, two branch's runners assemble before getting into the opening of circular arc section 231, in order to further guide, the rectification, reduce rivers and interfere and energy loss.

The cleaning machine of this embodiment includes box 4, bottom spray arm 5 and top spray arm 6, still include above-mentioned open water pump, box 4 bottom is provided with recessed return water region 41, the top of this return water region 41 covers there is the filter 42, spiral case 1 is located in the return water region 41, the clearance that absorbs water has between the water sucking mouth 13 of spiral case 1 bottom and the 41 bottoms of return water region, the first delivery port 11 at spiral case 1 top is located on the filter 42 and is linked together with the water inlet of bottom spray arm 5, top spray arm 6 locates upper portion and is linked together through the second delivery port 12 of water supply pipe 7 with spiral case 1 in the box 4. The bottom of the box 4 is provided with a driving part 8, and an output shaft 81 of the driving part 8 penetrates the bottom wall of the box 4 upwards to be connected with the centrifugal impeller 3 so as to drive the impeller 3 to rotate.

In the circumferential flowing process of water flow in the volute 1, the water flow is divided into two parts through the first water dividing opening 201 and the second water dividing opening 202 respectively, a semi-surrounding structure A formed by the guide vanes 22 is offset relative to the center of the cover plate 21, and the offset structure is matched with the spiral structure of the guide vanes 22 to pressurize the water flow together, so that the pressurizing effect is further improved, the energy loss is reduced, and the water flow pressure meets the water pumping requirement on the basis of simplifying the water pump structure; during assembly, the circumferential constraint position of the cover plate 21 in the volute 1 can be used for controlling the size of the communication area between the first water dividing port 201 and the second water outlet 12, so that the size of each strand of water flow after division can be regulated and controlled, and the specific cleaning requirement of a user can be met.

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (12)

1. An assembly structure of an open water pump, comprising a volute (1), characterized in that: the device also comprises a space guide vane (2) arranged in the volute (1);

the bottom of the volute (1) is provided with a water suction port (13), the top of the volute (1) is provided with a first water outlet (11), and the side part of the volute is provided with a second water outlet (12);

the space guide vane (2) comprises a cover plate (21) and guide vanes (22), the cover plate (21) is disc-shaped, the guide vanes (22) are at least two and are vertically arranged on the lower surface of the cover plate (21), each guide vane (22) spirally extends along the circumferential direction on the edge of the cover plate (21) and forms a semi-surrounding structure (A), a first water distribution opening (201) is formed at the opening of the semi-surrounding structure (A), and a second water distribution opening (22) is partially and alternately surrounded between every two adjacent guide vanes (22);

the utility model discloses a volute (1) is characterized in that the apron (21) transversely arranges and press close to volute (1) inner wall at volute (1) middle part and edge and arrange, separate volute (1) inner chamber for last cavity (101) and lower cavity (102), first delivery port (11) are located cavity (101) top, second delivery port (102) are located cavity (102) lateral part down, the bottom edge of guide vane (22) supports on volute (1) interior diapire, half enclosed construction (A) that guide vane (22) formed presses close to and arranges and shirks the formula with volute (1) inner wall that is relative with second delivery port (12) and is connected, second branch mouth of a river (202) presses close to volute (1) inner wall department and link up with last cavity (101).

2. The assembly structure of an open water pump according to claim 1, wherein: the semi-surrounding structure (A) and the area inside the inner wall of the volute (1) form a functional area (B) capable of carrying out bidirectional flow splitting and pressurization on water flow, and the functional area is offset relative to the center of the volute (1).

3. The assembling structure of an open water pump according to claim 2, wherein: the inner wall of the volute (1) is provided with a clamping groove (14) extending up and down, and correspondingly, the outer peripheral surface of the guide vane (22) is provided with a convex rib (224) which can be matched and clamped with the clamping groove (14).

4. The assembling structure of the open water pump according to claim 3, wherein: the cross section width of the convex rib (224) is gradually reduced from the outer surface of the flow guide blade (22) to the outside, and the shape of the clamping groove (14) is matched with that of the convex rib (224).

5. The assembling structure of the open water pump according to claim 3, wherein: the width of the upper part of the clamping groove (14) is larger than that of the lower part, and the side wall of the upper part of the clamping groove (14) is in smooth transition with the side wall of the lower part.

6. The assembling structure of the open water pump according to claim 3, wherein: the offset of the first water dividing port (201) relative to the second water outlet (12) in the circumferential direction is used for controlling the water flow divided by the first water dividing port (201) and the second water dividing port (202).

7. The assembling structure of an open water pump according to any one of claims 1 to 6, wherein: a diversion port (203) for water of the second diversion port (22) to enter the upper cavity upwards is formed at the joint of the two adjacent diversion blades (22).

8. The assembling structure of the open water pump according to claim 7, wherein: the upper surface of apron (21) is provided with baffle (23) that upwards extends, and roof and inside wall offset in this baffle (23) top and spiral case (1), baffle (23) enclose jointly with spiral case (1) inner wall and close out and carry out the conflux flow channel (230) that gathers through the water that water conservancy diversion mouth (203) upwards guided, and this conflux flow channel (230) have the uncovered of arranging towards first delivery port (11).

9. The assembling structure of an open water pump according to any one of claims 1 to 6, wherein: the centrifugal impeller (3) can be rotatably arranged in the lower cavity (102) and inside the semi-surrounding structure (A), the driving piece (8) is arranged below the volute (1) and the output shaft (81) upwards penetrates through the water suction port (13) to be connected with the centrifugal impeller (3).

10. The assembly structure of an open water pump according to claim 9, wherein: the central part of the lower surface of the cover plate (21) is provided with a yielding groove (211) which is arranged corresponding to the output shaft (81) of the driving piece (8).

11. The assembly structure of an open water pump according to claim 9, wherein: the height of the centrifugal impeller (3) is b2, the distance between the lower surface of the cover plate (21) and the inner bottom wall of the volute (1) is b3, and b3= (1.15-1.25) b2.

12. The utility model provides a cleaning machine, includes box (4), bottom spray arm (5) and top spray arm (6), its characterized in that: the open water pump further comprises an assembly structure of the open water pump according to any one of claims 1 to 11, wherein a concave water return area (41) is arranged at the bottom of the box body (4), a filter plate (42) covers the top of the water return area (41), the volute (1) is arranged in the water return area (41), a water suction gap is formed between a water suction port (13) at the bottom of the volute (1) and the bottom of the water return area (41), a first water outlet (11) at the top of the volute (1) is positioned above the filter plate (42) and communicated with a water inlet of the bottom spray arm (5), and the top spray arm (6) is arranged at the middle upper part of the box body (4) and communicated with a second water outlet (12) of the volute (1) through a water feeding pipeline (7).

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