A strong discharge pump structure and a cleaning machine using the strong discharge pump structure

Abstract

The present invention relates to a forced-discharge pump structure, including a volute, a one-way valve, an impeller, a driving member and a pressure switch assembly. The volute is hollow inside to form a drainage chamber, and the top of the volute has a water inlet and the bottom has a drainage port; the one-way valve is arranged at the drainage port; the impeller is rotatably arranged in the volute; the driving member is used to drive the impeller to rotate; the pressure switch assembly is used to control whether the driving member is started or not according to the pressure in the drainage chamber detected. When in use, water continuously enters the drainage chamber, causing the pressure in the drainage chamber to continuously increase. When the starting pressure of the pressure switch assembly is reached, the driving member starts to drive the impeller to drain water. When the drainage is nearly completed, the rotation of the impeller in the volute causes the internal pressure to be higher until the water is completely drained, the impeller runs idle, and the pressure is reduced to the stop pressure of the pressure switch assembly. The driving member drives the impeller to stop working. The present invention reduces the amount of residual water in the pump by maintaining a higher drainage pressure in the drainage chamber, which is beneficial to improving the service life of the pump.

Description

Technical Field

[0001] The invention relates to the field of fluid power delivery structures, and in particular to a forced-discharge pump structure and a cleaning machine using the forced-discharge pump structure. Background Art

[0002] Existing forced-discharge pumps, such as small household water pumps like sewage lifting pumps, usually use a water level switch (pressure switch) to control the start and stop of the pump. However, the pressure switches on the market currently use the height of the liquid level to start and stop the pump, which is not well integrated with the pump structure itself, resulting in a large amount of water remaining in the pump body after the pump stops working.

[0003] For sewage lifting pumps, a large amount of residual water will not only produce odor, but also cause certain corrosion to the box body, affecting consumers' user experience and the service life of the pump.

[0004] Therefore, further improvements are needed to the current forced discharge pump structure. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a strong drainage pump structure which reduces the amount of residual water in the pump and increases the service life by maintaining a higher drainage pressure in view of the current status of the prior art.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning machine using the above-mentioned forced discharge pump structure in view of the current status of the prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a strong discharge pump structure, characterized in that: it includes:

[0008] A volute, the interior of which is hollow to form a drainage cavity, the top of the volute having a water inlet connected to the drainage cavity, and the bottom of the volute having a drainage port connected to the drainage cavity;

[0009] A one-way valve, arranged at the drain outlet of the volute;

[0010] an impeller rotatably disposed in the volute and used to discharge water in the drainage chamber through a drainage port;

[0011] a driving member, which is disposed on the volute and has an output end connected to the impeller, and is used to drive the impeller to rotate; and

[0012] The pressure switch assembly is connected to the volute and is used to control whether the driving member is started or not according to the pressure in the drainage chamber detected.

[0013] Preferably, the pressure switch assembly includes a housing, an air pipe and a pressure switch, a drain pipe is provided at the drain port of the volute, the housing is provided at the top of the drain pipe and has a hollow pressure chamber, the first end of the air pipe is connected to the pressure chamber, and the second end of the air pipe is connected to the pressure switch. With the above structure, the pressure chamber stores and transmits pressure, and as the amount of liquid in the drainage chamber increases, the air is gradually compressed and transmitted to the pressure switch through the air pipe, thereby realizing the opening and closing of the driving member.

[0014] Preferably, the lower part of the shell is an inverted cone structure and the bottom edge is connected to the top wall of the drain pipe. The top wall of the drain pipe is arched toward the pressure chamber and a port for water supply and gas to enter the pressure chamber is provided on the arched portion. The pressure chamber is arranged at the top of the drain pipe, and the gravity of the pressure chamber and water can be used to prevent excessive water from entering the pressure chamber and blocking the air pipe; at the same time, the bottom wall of the pressure chamber adopts an arched structure that matches the shape of the top wall of the drain pipe, which ensures a good drainage effect of the drain pipe and is also conducive to quickly draining the water entering the pressure chamber into the drain pipe.

[0015] More preferably, the opening is provided with a partition bar which can separate the opening into a plurality of small openings. The partition bar can prevent larger debris in the drainage from entering the pressure chamber.

[0016] Preferably, the first end of the air pipe is inserted into the pressure bin from the top of the pressure bin and is located above the partition bar, there are at least two partition bars and they are arranged crosswise, and the port of the first end of the air pipe is arranged corresponding to the intersection of the partition bars. The part of the air pipe extending into the pressure bin is provided with a notch extending axially upward from the edge of the first end. During the drainage process, when part of the water enters the pressure bin, the above structure is conducive to avoiding blockage of the air pipe.

[0017] In order to facilitate assembly, a detachable top cover is arranged on the top of the shell, and the air pipe is inserted on the top cover.

[0018] Preferably, a baffle extending in the axial direction is provided on the inner wall of the shell, and the number of the baffles is at least two and they are arranged at intervals along the circumference of the pressure chamber. When water enters the pressure chamber, it enters in a rotating state, and the baffle can increase the rotation resistance of the water body, and produce a large number of bubbles with the impact of the water flow, thereby keeping the pressure chamber from being full and avoiding airway blockage.

[0019] Preferably, the drainage chamber of the volute includes a water guide portion located at the upper part and a water storage portion located at the lower part, the inner diameter of the water guide portion gradually decreases from top to bottom to form an inverted conical chamber, the water storage portion is formed as a cylindrical chamber with an inner diameter greater than or equal to the inner diameter of the upper port of the water guide portion, the impeller is arranged in the cylindrical chamber, and the drainage port is located at the side of the cylindrical chamber. The above-mentioned water guide portion is conducive to improving the water guide and drainage effects, the water storage portion is filled with air when there is no water accumulation, and when water continues to enter, air compression can be achieved through the pre-stored air, thereby activating the pressure switch for active drainage.

[0020] A cleaning machine using the above-mentioned forced drainage pump structure includes a box body with a washing chamber, and a drainage outlet connected to the washing chamber is opened on the bottom wall of the box body. It is characterized in that the forced drainage pump structure is arranged outside the box body, and the water inlet of the forced drainage pump structure is connected to the drainage outlet.

[0021] Compared with the prior art, the advantages of the present invention are: the present invention associates the pressure in the volute with the driving member through the pressure switch assembly. When in use, water continuously enters the drainage chamber of the volute, causing the pressure in the drainage chamber to continuously increase. When the starting pressure of the pressure switch assembly is reached, the driving member starts to drive the impeller to drain water. When the drainage is almost completed, the internal pressure is higher due to the rotation of the impeller in the volute until the water is drained, the impeller runs idle, and the pressure is reduced to the stop pressure of the pressure switch assembly. The driving member drives the impeller to stop working. The present invention reduces the amount of residual water in the pump by maintaining a higher drainage pressure in the drainage chamber, which is beneficial to increasing the service life of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a forced displacement pump structure in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure with part of the shell hidden;

[0024] Figure 3 A cross-sectional view of a forced displacement pump structure in an embodiment of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the pump casing in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the pump casing from another angle;

[0027] Figure 6 is a cross-sectional view of the pump casing;

[0028] Figure 7 is a cross-sectional view of a top cover according to an embodiment of the present invention;

[0029] Figure 8Schematic diagram of the structure of a cleaning machine in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below with reference to the accompanying drawings.

[0031] like Figures 1 to 7 As shown, the forced displacement pump structure of this embodiment includes a volute 1, a one-way valve 2, an impeller 3, a driving member 4, and a pressure switch assembly 5. The volute 1 is hollow inside to form a drainage chamber 11. The top of the volute 1 has a water inlet 12 connected to the drainage chamber 11, and the bottom has a drainage port 13 connected to the drainage chamber 11. The one-way valve 2 is arranged at the drainage port 13 of the volute 1. The one-way valve 2 is a check valve that allows water to be discharged after the pressure in the drainage chamber 11 reaches a certain value. The impeller 3 is rotatably arranged in the volute 1 and is used to discharge the water in the drainage chamber 11 through the drainage port 13. The driving member 4 is arranged on the volute 1 and the output end is connected to the impeller 3, which is used to drive the impeller 3 to rotate. The pressure switch assembly 5 is connected to the volute 1, and is used to control whether the driving member 4 is started or not according to the pressure in the drainage chamber 11 detected.

[0032] A drain pipe 14 is provided at the drain port 13 of the volute 1. The drain pipe 14 in this embodiment is integrally formed with the volute 1. A housing 6 can also be provided outside the volute 1, drain pipe 14, drive member 4, and pressure switch assembly 5 of this embodiment to protect the components and maintain the appearance.

[0033] The pressure switch assembly 5 of this embodiment includes a housing 51, an air pipe 52 and a pressure switch 53. The housing 51 is arranged on the top of the drain pipe 14 and has a hollow pressure chamber 511. The housing 51 can be integrally formed with the drain pipe 14. The first end of the air pipe 52 is connected to the pressure chamber 511, and the second end of the air pipe 52 is connected to the pressure switch 53. The pressure chamber 511 stores and transmits pressure through the air pipe 52. As the amount of liquid in the drainage chamber 11 increases, the air is gradually compressed, and the air pressure is transmitted to the pressure switch 53 through the air pipe 52. The pressure switch 53 and the driving member 4 are controlled by the same control system. When the pressure switch 53 detects that the pressure reaches the set value, the driving member 4 starts to operate, driving the impeller 3 to rotate to drain water.

[0034] The top of the housing 51 of this embodiment is provided with a detachable top cover 512, and the air pipe 52 is inserted on the top cover 512 for easy assembly. The lower part of the housing 51 is an inverted cone structure 514 and the bottom edge 512 is connected to the top wall of the drain pipe 14. The top wall of the drain pipe 14 is arched toward the pressure chamber 511 and a port 142 for water supply and gas to enter the pressure chamber is opened on the arched part 141. The pressure chamber 511 is arranged on the top of the drain pipe 14, and the gravity of the pressure chamber 511 and water can be used to prevent excessive water from entering the pressure chamber 511 and blocking the air pipe 52; at the same time, the bottom wall of the pressure chamber 511 adopts an arched structure that matches the shape of the top wall of the drain pipe 14, which ensures a good drainage effect of the drain pipe 14 and is also conducive to quickly draining the water entering the pressure chamber 511 into the drain pipe 14. The opening 142 is provided with a partition bar 1422 which can separate the opening 142 into a plurality of small openings 1421 . The partition bar 1422 can prevent larger debris in the drainage from entering the pressure chamber 511 .

[0035] like Figure 6 As shown, the first end of the air pipe 52 is inserted into the pressure bin 511 from the top of the pressure bin 511 and is located above the partition bar 1422. There are two partition bars 1422 arranged in a cross shape, and the port of the first end of the air pipe 52 is arranged corresponding to the intersection 1423 of the partition bars 1422. The portion of the air pipe 52 extending into the pressure bin 511 is provided with a notch 521 extending axially upward from the edge of the first end. There are two notches 521 and they are symmetrically arranged in the circumferential direction. During the drainage process, when part of the water enters the pressure bin 511, the above structures are conducive to avoiding blockage of the air pipe 52. The notch 521 also facilitates the gas in the pressure bin 511 to be compressed into the air pipe 52 along the notch 521, thereby improving the utilization rate of the gas in the pressure bin 511. Figure 7 As shown, the portion of the air pipe 52 located above the top cover 512 forms an angle b of 8 to 30 degrees with the upper wall of the top cover 512 to prevent the air pipe 52 from falling off and prevent water from entering the air pipe 52 and continuing to flow. The inner wall of the shell 51 is provided with a baffle 513 extending in the axial direction. The baffles 513 are four and are arranged at intervals along the circumference of the pressure chamber 511. When water enters the pressure chamber 511, it enters in a rotating state. The baffles 513 can increase the rotation resistance of the water body and produce a large number of bubbles with the impact of the water flow, thereby keeping the pressure chamber 511 not full and avoiding blockage of the air pipe.

[0036] The drainage chamber 11 of the volute 1 of this embodiment includes a water guide 111 located at the upper part and a water storage part 112 located at the lower part. The inner diameter of the water guide 111 gradually decreases from top to bottom to form an inverted conical cavity. The water storage part 112 is formed as a cylindrical cavity with an inner diameter slightly larger than the inner diameter of the upper end of the water guide 111. The drainage port 13 is located on the side of the cylindrical cavity. The impeller 3 is arranged in the cylindrical cavity, and the driving member 4 is a motor arranged at the bottom of the volute 1, and the output end of the motor is connected to the impeller 3. The above-mentioned water guide 111 is conducive to improving the water guide and drainage effects. The water storage part 112 is filled with air when there is no water accumulation. When water continues to enter, air compression can be achieved through the pre-stored air, and then the pressure switch 53 is activated to perform active drainage.

[0037] like Figure 8 As shown, the cleaning machine using the above-mentioned forced drainage pump structure in this embodiment includes a box body 7 with a washing chamber, a drainage outlet 71 connected to the washing chamber is opened on the bottom wall of the box body 7, a traction valve 72 is arranged at the drainage outlet 71, and a forced drainage pump structure a is arranged outside the box body 7. A nut 8 is arranged on the water inlet 12 of the forced drainage pump structure a, and the nut can be detachably connected to the water outlet end of the traction valve 72.

[0038] During use, water continuously enters the drainage chamber 11 of the volute 1, causing the pressure in the drainage chamber 11 to continuously increase. When the starting pressure of the pressure switch assembly 5 is reached, the driving member 4 starts to drive the impeller 3 to drain water, and the one-way valve 2 opens. When the drainage is nearly completed, the internal pressure is relatively high due to the rotation of the impeller 3 in the volute 1 until the water is completely drained, the impeller 3 idles, and the pressure drops to the stop pressure of the pressure switch assembly 5. The driving member 4 drives the impeller 3 to stop working, and the one-way valve 2 is closed. This embodiment reduces the amount of residual water in the pump by maintaining a relatively high drainage pressure in the drainage chamber 11, which is beneficial to increasing the service life of the pump.

Claims

1. A forced discharge pump structure, characterized in that: include A volute (1) having a hollow interior to form a drainage cavity (11); the volute (1) has a water inlet (12) at the top thereof and a drainage cavity (11) at the bottom thereof; a one-way valve (2) disposed at a drain port (13) of the volute (1); An impeller (3) rotatably disposed in the volute (1) and used to discharge water in the drainage chamber (11) through a drainage port (13); a driving member (4), which is disposed on the volute (1) and has an output end connected to the impeller (3) and is used to drive the impeller (3) to rotate; and A pressure switch assembly (5) is connected to the volute (1) and is used to control whether the driving member (4) is started or not according to the pressure in the drainage chamber (11) detected; The drainage chamber (11) of the volute (1) comprises a water guide portion (111) located at an upper portion and a water storage portion (112) located at a lower portion, the inner diameter of the water guide portion (111) gradually decreases from top to bottom to form an inverted conical chamber, the water storage portion (112) is formed as a cylindrical chamber with an inner diameter greater than or equal to the inner diameter of an upper end of the water guide portion (111), the impeller (3) is arranged in the cylindrical chamber, and the drainage port (13) is located at a side of the cylindrical chamber; a drainage pipe (14) is arranged at the drainage port (13) of the volute (1).

2. The forced displacement pump structure according to claim 1 is characterized in that: The pressure switch assembly (5) comprises a housing (51), an air pipe (52) and a pressure switch (53); the housing (51) is arranged on the top of the drain pipe (14) and has a hollow pressure chamber (511); a first end of the air pipe (52) is connected to the pressure chamber (511); and a second end of the air pipe (52) is connected to the pressure switch (53).

3. The forced displacement pump structure according to claim 2 is characterized in that: The lower part of the shell (51) is an inverted cone-shaped structure (514) and the bottom edge is connected to the top wall of the drain pipe (14). The top wall of the drain pipe (14) is arched toward the pressure chamber (511) and a port (142) is provided on the arched part (141) for supplying water and gas into the pressure chamber (511).

4. The forced displacement pump structure according to claim 3 is characterized in that: The opening (142) is provided with a partition bar (1422) capable of dividing the opening (142) into a plurality of small openings (1421).

5. The forced displacement pump structure according to claim 4 is characterized in that: The first end of the air pipe (52) is inserted into the pressure chamber (511) from the top of the pressure chamber (511) and is located above the partition bars (1422). There are at least two partition bars (1422) which are arranged crosswise. The port of the first end of the air pipe (52) is arranged corresponding to the intersection (1423) of the partition bars (1422).

6. The forced displacement pump structure according to claim 5, characterized in that: The portion of the air pipe (52) extending into the pressure chamber (511) is provided with a notch (521) extending axially upward from the edge of the first end.

7. The forced displacement pump structure according to any one of claims 2 to 6, characterized in that: A detachable top cover (512) is provided on the top of the housing (51), and the air pipe (52) is inserted on the top cover (512).

8. The forced displacement pump structure according to any one of claims 2 to 6, characterized in that: A baffle (513) extending in the axial direction is arranged on the inner wall of the shell (51), and the baffles (513) are at least two and are arranged at intervals along the circumference of the pressure chamber (511).

9. A cleaning machine using the forced drainage pump structure of any one of claims 1 to 8, comprising a housing (7) having a washing chamber, a drainage outlet (71) communicating with the washing chamber being formed on the bottom wall of the housing (7), characterized in that: The forced drainage pump structure (a) is arranged outside the box body (7), and the water inlet (12) of the forced drainage pump structure (a) is connected to the drainage outlet (71).

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