Improved structure of submersible pump

Abstract

The utility model discloses an improved structure of a submersible pump. The improved structure comprises a shell, a pump body, a motor and an impeller, the pump body comprises an inner shell and an outer shell which are sleeved inside and outside, a water passing cavity is formed between the inner shell and the outer shell, and an outer shell opening communicated with the water passing cavity is formed in the bottom of the outer shell. The motor is installed in the inner shell and provided with a motor rotating shaft extending out of the bottom of the inner shell, and the impeller is installed at the motor rotating shaft and exposed out of an opening of the outer shell. An impeller cover is detachably installed at the opening position of the shell, the impeller cover covers the periphery of the impeller at the same time, and the impeller cover is provided with a water inlet communicated with the water passing cavity and the outside. By arranging the detachable impeller cover, once the impeller is wound and blocked by sundries such as hair and stops rotating, the impeller cover can be detached, so that the sundries in the impeller can be quickly and conveniently cleaned, and normal work of the submersible pump is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of pumps, in particular to an improved structure of a submersible pump. Background Art

[0002] A submersible pump is a very widely used water treatment tool. Different from ordinary pumps, it works underwater and usually includes a pump body, a motor, and an impeller. The pump body is provided with a water inlet and a water outlet. When the motor starts, it drives the impeller to rotate, driving water to enter from the water inlet and then discharge from the water outlet. The water flow channel is formed by the hollow part inside the pump body.

[0003] There are defects in existing submersible pumps such as impeller jamming or reduced drainage efficiency; since submersible pumps are generally centrifugal pumps, the impeller is prone to winding debris such as hair, resulting in impeller jamming or affecting the pump efficiency; moreover, generally the impeller is installed inside a housing after integral ultrasonic welding, making it difficult to clean the debris. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an improved structure of a submersible pump, which has the advantages of convenient debris cleaning and ensuring the normal operation of the submersible pump.

[0005] To achieve the above object, the solution of the utility model is:

[0006] An improved structure of a submersible pump, including a housing, a pump body, a motor, and an impeller;

[0007] The pump body includes an inner shell and an outer shell sleeved inside and outside. A water passing cavity is formed between the inner shell and the outer shell. The bottom of the outer shell is provided with an outer shell opening communicating with the water passing cavity; the motor is installed inside the inner shell and has a motor rotating shaft extending out of the bottom of the inner shell. The impeller is installed at the motor rotating shaft, and the impeller is exposed at the outer shell opening;

[0008] The outer shell opening is detachably installed with an impeller cover. The impeller cover simultaneously covers the periphery of the impeller. The impeller cover has a water inlet communicating with the water passing cavity and the outside;

[0009] The housing includes an upper housing and a lower mesh cover that can be detachably connected up and down. The upper housing and the lower mesh cover are connected up and down to surround the pump body; the lower mesh cover is provided with water passing mesh holes communicating with the water inlet and the outside, and the lower mesh cover covers the periphery of the impeller cover.

[0010] Further, the top of the impeller cover has a cover opening corresponding to the outer shell opening. The edge of the cover opening is provided with a plurality of circumferentially spaced clamping blocks; corresponding to each clamping block at the outer shell opening, a plurality of clamping grooves are provided; each clamping block of the impeller cover is respectively rotationally clamped into each clamping groove to connect and fix the impeller cover to the outer shell opening position.

[0011] Further, a clamping ring protrudes upward from the edge of the cover opening. The clamping ring extends upward into the opening of the housing, and the outer wall of the clamping ring is in close contact with the inner wall of the housing opening; each clamping block protrudes from the outer wall of the clamping ring; several circumferentially spaced clamping hooks extend downward from the edge of the housing opening, the number of the clamping hooks being equal to the number of the clamping blocks, and a clamping groove is formed inside each clamping hook.

[0012] Further, the clamping blocks are strip-shaped extending circumferentially; there is a gap between adjacent clamping blocks for the clamping hooks to extend into.

[0013] Further, several protruding push plates are provided on the outer wall of the impeller cover.

[0014] Further, a rotating cavity is provided inside the impeller cover. The water inlet is located in the middle of the bottom surface of the rotating cavity, and the top of the rotating cavity communicates with a water passing cavity; and the impeller is located in the rotating cavity. The bottom of the impeller is the water inlet side of the impeller, and this water inlet side of the impeller is opposite to the water inlet. The circumferential surface of the impeller is the water outlet side of the impeller, and the water outlet side of the impeller faces the side wall of the rotating cavity.

[0015] Further, the impeller cover is rotationally clamped to the bottom of the housing in one direction; several spiral guiding steps protrude circumferentially and evenly spaced on the side wall of the rotating cavity. Each spiral guiding step is spaced from the water outlet side of the impeller and is used to guide the liquid on the water outlet side of the impeller to flow into the water passing cavity; and the spiral direction of each spiral guiding step is the same as the installation direction of the impeller cover.

[0016] Further, three spiral guiding steps are provided inside the side wall of the rotating cavity. The spiral guiding step has a spiral inclined surface inclined along the spiral direction, and a guiding flow channel is formed between the spiral inclined surface and the side wall of the rotating cavity.

[0017] Further, an upper cavity for accommodating the upper part of the pump body is provided inside the upper housing. A drain port is recessed on the right side of the inner wall of the upper cavity; a drain part for externally connecting a drain pipe is provided on the right outer wall of the upper housing, and the drain channel of the drain part communicates with the drain port; a protruding water outlet part is provided on the outer wall of the upper part of the pump body, and a water outlet for communicating with the water passing cavity is provided on the outer end face of the water outlet part; the upper part of the pump body is installed and fixed in the upper cavity, and the outer end of the water outlet part is embedded in the drain port on the inner wall of the upper cavity.

[0018] Further, a capacitance sensing device is further included. The capacitance sensing device is electrically connected to the motor; an induction housing is provided on one side of the housing of the pump body. A waterproof and airtight installation chamber is provided inside the induction housing, and the capacitance sensing device is arranged in the installation chamber; the capacitance sensing device has at least two induction pole pieces spaced up and down and closely attached to the inner wall of the induction housing.

[0019] After adopting the above technical solution, by providing a detachable impeller cover, once the impeller is blocked by debris such as hair and stops rotating, the impeller cover can be removed to quickly and conveniently clean the debris inside the impeller. Moreover, the detachable impeller cover eliminates the complex ultrasonic welding steps, reduces production costs, and does not have the problem of uneven welding. In addition, the outer shell is provided to protect the pump body, and the lower mesh cover is also detachable and has water passing mesh holes, which can achieve filtration and reduce the occurrence of impeller blockage. Description of the Drawings

[0020] Figure 1 Stereogram of the embodiment of the present utility model;

[0021] Figure 2 Exploded view of the embodiment of the present utility model;

[0022] Figure 3 Schematic diagram of the cooperation between the pump body and the impeller cover of the embodiment of the present utility model;

[0023] Figure 4 Cross-sectional view (I) of the embodiment of the present utility model;

[0024] Figure 5 Cross-sectional view (II) of the embodiment of the present utility model;

[0025] Figure 6 Stereogram of the impeller cover of the embodiment of the present utility model;

[0026] Figure 7 Top view of the impeller cover of the embodiment of the present utility model;

[0027] Figure 8 For Figure 7 Cross-sectional view taken along line A-A.

[0028] Reference numeral description: housing 1, upper housing 11, upper cavity 111, drain port 112, drain part 113, drain channel 114, lower mesh cover 12, water passing mesh holes 121, pump body 2, inner shell 21, outer shell 22, water passing cavity 23, outer shell opening 24, card slot 241, hook 242, impeller cover 25, water inlet 251, cover opening 252, block 253, snap ring 254, block gap 255, push plate 256, rotating cavity 257, spiral guiding step 258, spiral inclined surface 2581, guiding flow channel 259, water outlet part 26, water outlet 27, induction housing 28, installation chamber 281, motor 3, motor rotating shaft 31, impeller 4, impeller water inlet side 41, impeller water outlet side 42, capacitance induction device 5, induction pole piece 51. Detailed Embodiment

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Usually, the components of the embodiments of this application described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0030] As Figures 1 to 8 shown, an improved structure of a submersible pump in this embodiment includes a housing 1, a pump body 2, a motor 3, and an impeller 4.

[0031] The pump body 2 includes an inner shell 21 and an outer shell 22 which are sleeved inside and outside. A water passing cavity 23 is formed between the inner shell 21 and the outer shell 22. An outer shell opening 24 communicating with the water passing cavity 23 is provided at the bottom of the outer shell 22.

[0032] The motor 3 is installed inside the inner shell 21 and has a motor rotating shaft 31 extending out of the bottom of the inner shell 21. The impeller 4 is installed at the motor rotating shaft 31, and the impeller 4 is exposed at the outer shell opening 24.

[0033] An impeller cover 25 is detachably installed at the position of the outer shell opening 24. The impeller cover 25 simultaneously covers the periphery of the impeller 4. The impeller cover 25 has a water inlet 251 communicating the water passing cavity 23 and the outside.

[0034] The housing 1 includes an upper housing 11 and a lower wire mesh cover 12 which are detachably connected up and down. In this embodiment, the upper housing 11 and the lower wire mesh cover 12 can be connected and matched through a snap structure.

[0035] The upper housing 11 and the lower wire mesh cover 12 are connected up and down to surround the pump body 2; a water passing mesh hole 121 communicating the water inlet 251 and the outside is provided on the lower wire mesh cover 12, and the lower wire mesh cover 12 covers the periphery of the impeller cover 25.

[0036] Thus, by providing a detachable impeller cover 25, once the impeller 4 is blocked and stopped by debris such as hair, the impeller cover 25 can be removed to quickly and conveniently clean the debris inside the impeller 4. Moreover, the detachable impeller cover 25 eliminates the complex ultrasonic welding steps, reduces production costs, and does not have the problem of uneven welding; and the outer shell 22 is provided to protect the pump body 2, and the lower wire mesh cover 12 is also detachable and has water passing mesh holes 121, which can achieve filtration and reduce the situation of the impeller 4 being blocked.

[0037] As Figure 3 and Figure 4, the top of the impeller cover 25 has a cover opening 252 corresponding to the housing opening 24, and a plurality of circumferentially spaced clamping blocks 253 are provided at the edge of the cover opening 252; a plurality of clamping grooves 241 are provided at the housing opening 24 corresponding to each clamping block 253; each clamping block 253 of the impeller cover 25 is respectively rotatably clamped into each clamping groove 241 to connect and fix the impeller cover 25 to the position of the housing opening 24. The cooperation of the clamping blocks 253 and the clamping grooves 241 is provided to facilitate the installation of the impeller cover 25.

[0038] Specifically, referring to Figures 6 to 8 , a clamping ring 254 may protrude upward from the edge of the cover opening 252, the clamping ring 254 extends upward into the housing opening 24, and the outer wall of the clamping ring 254 is in close contact with the inner wall of the housing opening 24; each clamping block 253 protrudes from the outer wall of the clamping ring 254; a plurality of circumferentially spaced hooks 242 extend downward from the edge of the housing opening 24, the number of the hooks 242 is equal to the number of each clamping block 253, and the inner side of each hook 242 forms the clamping groove 241. In this embodiment, the clamping blocks 253 are three and are in the shape of long strips extending circumferentially; there is a clamping block gap 255 between adjacent clamping blocks 253, and the clamping block gap 255 is for the hook 242 to extend into. Thus, during installation, the hook 242 is inserted by aligning with the clamping block gap 255, and then the impeller cover 25 is rotated to clamp each clamping block 253 into the clamping groove 241 of the hook 242, and the installation can be completed. The operation is convenient and fast, and the connection is stable and reliable.

[0039] Moreover, a plurality of protruding push plates 256 may be provided on the outer wall of the impeller cover 25. It is convenient for the user to rotate the impeller cover 25 by means of the push plates 256.

[0040] Referring to Figure 4 , a rotating cavity 257 is provided inside the impeller cover 25, the water inlet 251 is located in the middle of the bottom surface of the rotating cavity 257, and the top of the rotating cavity 257 is communicated with a water passing cavity 23; and the impeller 4 is located in the rotating cavity 257, the bottom of the impeller 4 is the impeller water inlet side 41, and the impeller water inlet side 41 is opposite to the water inlet 251, the circumferential surface of the impeller 4 is the impeller water outlet side 42, and the impeller water outlet side 42 faces the side wall of the rotating cavity 257.

[0041] The impeller 4 rotates to pump water from the water inlet 251 and send it to the side wall of the rotating cavity 257, and then flows into the water passing cavity 23 to complete the pumping operation.

[0042] In this embodiment, the impeller cover 25 is rotationally clamped to the bottom of the housing 22 in one direction; referring to Figure 6 , a plurality of spiral guiding steps 258 are convexly provided at the side wall of the rotating cavity 257 at circumferentially uniform intervals, and each spiral guiding step 258 is spaced from the impeller water outlet side 42, and is used to guide the liquid on the impeller water outlet side 42 to flow to the water passing cavity 23; and the spiral direction of each spiral guiding step 258 is the same as the installation direction of the impeller cover 25.

[0043] Thus, when the impeller 4 rotates within the rotating cavity 257, it drives the liquid to rotate along the inside of the rotating cavity 257. When encountering the obstruction of the spiral guiding step 258, an upward force is generated along the direction of the spiral guiding step 258, causing the direction of the water flow to change, which can increase the flow rate. And when the water pump is started and then placed in water, it can accelerate the evacuation of air in the impeller 4, solving the problem of air entrapment. At the same time, the direction of the water flow is the same as the tightening direction of the impeller cover 25, so there is no force in the loosening direction, ensuring the stable installation of the impeller cover 25 without loosening.

[0044] Specifically, three of the spiral guiding steps 258 are provided inside the side wall of the rotating cavity 257. The spiral guiding step 258 has a spiral inclined surface 2581 inclined along the spiral direction. A diversion flow channel 259 is formed between the spiral inclined surface 2581 and the side wall of the rotating cavity 257. The diversion flow channel 259 can guide the water flow to smoothly flow to the water passing cavity 23 communicated with the cover opening 252 of the impeller cover 25, improving the efficiency of the pump.

[0045] Another example is Figure 2 and Figure 5 In this embodiment, an upper cavity 111 for accommodating the upper part of the pump body 2 is provided inside the upper housing 11. A drain port 112 is recessed on the right inner wall of the upper cavity 111; a drain part 113 for externally connecting a drain pipe (not shown in the figure) is provided on the right outer wall of the upper housing 11. The drain channel 114 of the drain part 113 communicates with the drain port 112; a protruding water outlet part 26 is provided on the outer wall of the upper part of the pump body 2, and a water outlet 27 communicating with the water passing cavity 23 is arranged on the outer end surface of the water outlet part 26; the upper part of the pump body 2 is installed and fixed in the upper cavity 111, and the outer end of the water outlet part 26 is embedded in the drain port 112 on the inner wall of the upper cavity 111.

[0046] Thus, the pump body 2 is fixed by the fitting of the water outlet part 26 and the drain port 112, without ultrasonic welding for both of them, saving the production process and facilitating the design and development of the product mold. At the same time, since there is an interference fit between the water outlet 27 communicated with the water passing cavity 23 of the pump body 2 and the drain port 112 of the drain part 113 for communicating with the drain pipe, that is, there is a certain gap between the water outlet 27 and the drain port 112, and this gap can be used for the gas in the water passing cavity 23 to discharge. Thus, the structure of this embodiment increases the exhaust function, preventing the phenomenon of air entrapment in the water passing cavity 23 of the pump body 2 and ensuring the flow rate and head of the pump.

[0047] Another example is Figure 4As shown in the figure, the improved structure of the submersible pump in this embodiment further includes a capacitance sensing device 5, which is electrically connected to the motor 3; on one side of the outer shell 22 of the pump body 2, there is an induction housing 28, and the induction housing 28 has a waterproof and airtight installation chamber 281, and the capacitance sensing device 5 is arranged in the installation chamber 281; the capacitance sensing device 5 has at least two induction pole pieces 51 that are spaced up and down and are in close contact with the inner wall of the induction housing 28. In this embodiment, the height of the induction pole piece 51 can be higher than the height of the water inlet 251 of the pump body 2. By means of the induction pole piece 51, the water level situation of the environment where the submersible pump is located can be obtained to control the motor 3 to automatically turn off or on and prevent dry running. The induction principle is an existing design, and the specific principle will not be elaborated here.

[0048] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, equivalent changes and modifications made without departing from the principle of the present invention should still fall within the protection scope of the present invention.

[0049] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this application is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

Claims

1. An improved structure of a submersible pump, characterized in that: Including casing, pump body, motor and impeller; The pump body comprises an inner shell and an outer shell which are arranged inside and outside, a water passage cavity is formed between the inner shell and the outer shell, and the bottom of the outer shell is provided with an outer shell opening connected to the water passage cavity; the motor is installed inside the inner shell and has a motor shaft extending out of the bottom of the inner shell, the impeller is installed at the motor shaft, and the impeller is exposed at the outer shell opening; An impeller cover is detachably mounted at the opening of the housing, and the impeller cover is also arranged around the periphery of the impeller, and the impeller cover has a water inlet connected to the water cavity and the outside; The shell comprises an upper shell and a lower mesh cover which are detachably connected up and down, and the upper shell and the lower mesh cover are connected up and down to surround the pump body; the lower mesh cover is provided with a water mesh hole connecting the water inlet and the outside, and the lower mesh cover is arranged on the periphery of the impeller cover.

2. The improved structure of a submersible pump according to claim 1, characterized in that: The top of the impeller cover has a cover opening corresponding to the opening of the outer shell, and the edge of the cover opening is provided with a plurality of circumferentially spaced blocks; the outer shell opening is provided with a plurality of slots corresponding to each block; each block of the impeller cover is rotated and inserted into each slot to connect and fix the impeller cover to the opening position of the outer shell.

3. The improved structure of a submersible pump according to claim 2, characterized in that: A circle of snap ring protrudes upward from the edge of the cover opening, the snap ring extends upward into the shell opening, and the outer wall of the snap ring is close to the inner wall of the shell opening; each clamping block is protruding from the outer wall of the snap ring; a number of circumferentially spaced hooks extend downward from the edge of the shell opening, the number of the hooks is equal to the number of the blocks, and the said slot is formed on the inner side of each hook.

4. The improved structure of a submersible pump according to claim 3, characterized in that: The clamping blocks are in the shape of long strips extending in the circumferential direction; there are clamping block gaps between adjacent clamping blocks, and the clamping hooks are inserted into the clamping block gaps.

5. The improved structure of a submersible pump according to claim 2, characterized in that: The outer wall of the impeller cover is provided with a plurality of protruding push plates.

6. The improved structure of a submersible pump according to claim 1, characterized in that: The impeller cover has a rotating chamber, the water inlet is located in the middle of the bottom surface of the rotating chamber, and the top of the rotating chamber is connected to the water chamber; and the impeller is located in the rotating chamber, the bottom of the impeller is the impeller water inlet side, the impeller water inlet side is opposite to the water inlet, the circumferential surface of the impeller is the impeller water outlet side, and the impeller water outlet side faces the side wall of the rotating chamber.

7. The improved structure of a submersible pump according to claim 6, characterized in that: The impeller cover is rotated in one direction and clamped on the bottom of the shell; a plurality of spiral guide steps are convexly provided at evenly spaced intervals in the circumferential direction on the side wall of the rotating chamber, each spiral guide step is spaced at the water outlet side of the impeller, and is used to guide the liquid on the water outlet side of the impeller to flow to the water passage chamber; and the spiral direction of each spiral guide step is the same as the installation direction of the impeller cover.

8. The improved structure of a submersible pump according to claim 7, characterized in that: Three spiral guide steps are arranged in the side wall of the rotating chamber. The spiral guide steps have a spiral inclined surface inclined along the spiral direction, and a guide channel is formed between the spiral inclined surface and the side wall of the rotating chamber.

9. The improved structure of a submersible pump according to claim 1, characterized in that: The upper shell body has an upper cavity for accommodating the upper part of the pump body, and the inner wall of the upper cavity is recessed with a drain outlet on the right side; the outer wall on the right side of the upper shell body is provided with a drain part for externally connecting a drain pipe, and the drainage channel of the drain part is connected to the drain outlet; the outer wall of the upper part of the pump body is provided with a protruding water outlet, and the outer end surface of the water outlet is provided with a water outlet connected to the water cavity; the upper part of the pump body is installed and fixed in the upper cavity, and the outer end of the water outlet is embedded in the drain outlet on the inner wall of the upper cavity.

10. The improved structure of a submersible pump according to claim 1, characterized in that: It also includes a capacitive sensing device, which is electrically connected to the motor; an induction shell is provided on one side of the outer shell of the pump body, and a waterproof and sealed installation chamber is provided in the induction shell, and the capacitive sensing device is arranged in the installation chamber; the capacitive sensing device has at least two induction poles spaced up and down and tightly attached to the inner wall of the induction shell.

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