Water accumulation prevention structure for pump

Abstract

The invention discloses a water accumulation prevention structure for a pump, and belongs to the field of pump units. The device comprises a machine base and a control box, an unblocking structure is arranged at the axial end of the machine base, the control box is provided with a first box body, the first box body is installed at the axial end of the machine base, and a through matching through hole is formed in the position, corresponding to the unblocking structure, of the first box body; a plurality of groups of mounting columns protruding outwards are arranged at the end part of the base, matched base mounting holes are correspondingly formed in the bottom of the first box body, the mounting columns are embedded into the base mounting holes in a matched manner, a drainage gap which is at least 0.5 mm in the axial direction is formed between the end surface of the base and the bottom surface of the first box body after the mounting columns are mounted in place, and a matched through hole in the first box body is communicated with the drainage gap. Water flowing out from the unblocking threaded hole in the machine base can be directly drained away from the drainage gap and cannot be accumulated between the machine base and the first box body for a long time, effective water accumulation prevention of the pump body is achieved, and safety is improved.

Description

Technical Field

[0001] This invention relates to the field of pump unit technology, and more specifically, to a pump anti-water accumulation structure. Background Technology

[0002] Centrifugal pumps, submersible pumps, and other water pump equipment are widely used in drainage, irrigation, and industrial circulation. In actual operation, the impeller is often easily entangled or clogged by fibers, silt, and debris, leading to performance degradation or even complete seizure. To solve this problem, the industry typically installs mechanical anti-clogging structures such as unclogging holes, backflushing holes, and cleaning holes on the pump body or base. Tools are inserted through these holes for manual cleaning or backflushing / venting operations to restore the pump to normal operation.

[0003] However, through long-term research and practice, the applicant discovered that while the anti-clogging structure solves the impeller clogging problem to some extent, during venting or unclogging operations, liquid in the pump chamber inevitably flows out along the unclogging hole. This outflowing liquid cannot be completely discharged to the outside but tends to accumulate between the base and the electrical control box. This results in water accumulation that cannot be discharged in a timely and automatic manner. Long-term retention of the accumulated liquid not only easily corrodes metal components such as the base and fasteners, affecting their service life, but also poses a risk of seeping into the motor, potentially causing short circuits in the windings or even motor burnout, leading to significant safety risks and economic losses. Therefore, how to achieve efficient anti-clogging and unclogging functions while further addressing the water accumulation problem during operation is crucial for improving the long-term operational reliability and safety of the water pump. Summary of the Invention

[0004] 1. The technical problem that the invention aims to solve In view of the problem that water accumulation is easily caused during the unblocking operation of the pump body in the prior art, the present invention aims to provide a water accumulation prevention structure for pumps, which can effectively solve the water accumulation problem, realize the timely discharge of accumulated water, and improve the long-term operational reliability and safety of water pumps.

[0005] 2. Technical Solution To achieve the above objectives, the technical solution provided by the present invention is as follows: The present invention provides a pump anti-water accumulation structure, including a base and a control box. The axial end of the base is provided with an outwardly extending unblocking structure. The control box has a first box body, which is fitted and installed on the axial end of the base. The first box body is provided with a through hole corresponding to the unblocking structure. The unblocking structure can be opened by passing through the through hole on the first box body. The end of the base is provided with multiple sets of outwardly protruding mounting posts, and the bottom of the first box is provided with corresponding matching seat mounting holes. The mounting posts are fitted into the seat mounting holes, and after installation, there is an axial drainage gap of at least 0.5mm between the end face of the base and the bottom surface of the first box, which communicates with the outside. The matching through hole on the first box communicates with this drainage gap.

[0006] Furthermore, the control box also includes a second box body, which is distributed on the radial outer side of the base and is electrically connected to the first box body. The electronic control components are respectively installed in the first box body and the second box body.

[0007] Furthermore, the bottom surface of the first box is provided with multiple drainage grooves at intervals around the mating through hole, and the drainage grooves extend to connect the mating through hole with the outside.

[0008] Furthermore, an operating cylinder is provided inside the first box along the direction away from the base, and an operating through hole is formed inside the operating cylinder. The unblocking structure on the base can be opened by passing through the operating through hole. The operating through hole is a trumpet hole with an opening that gradually increases in size along the axial direction towards the base.

[0009] Furthermore, a seat through hole is provided at the center of the end of the base for the unblocking structure to protrude outward. An interface seat protruding outward is also provided around the outside of the seat through hole on the base. The wall surface of the interface seat facing the seat through hole is a beveled part B, and the height of the beveled part B gradually decreases from the center to both ends along the length direction.

[0010] Furthermore, the base is provided with an outwardly protruding boss around the outside of the seat through hole. The wall surface of the seat boss facing the seat through hole is a beveled part A. The height of the beveled part A gradually decreases from the center to both ends along the length direction. The seat boss and the interface seat are distributed on both sides of the seat through hole in the radial direction.

[0011] Furthermore, a protruding ring is formed on the inner side of the top of the operating cylinder, and a sealing groove is formed around the outer periphery of the protruding ring on the end face of the operating cylinder; a box cover is assembled on the first box body, and an outer cover through hole is provided on the box cover for the operating cylinder to extend out. An outer cover protruding ring is provided around the inner side of the outer cover through hole, and the outer cover protruding ring is fitted into the sealing groove and sealed.

[0012] Furthermore, the inner side of the first box is provided with a stepped post, and a seat mounting hole is formed in the stepped post. The stepped post includes a lower stepped part A and an upper stepped part B. The diameter of the hole in the stepped part B is smaller than the diameter of the hole in the stepped part A. The mounting post is assembled in the stepped part A and is limited at the top. A sealing ring groove is provided around the bottom of the first box surrounding the seat mounting hole. A corresponding annular protrusion is provided on the outer periphery of the mounting post to fit into the sealing ring groove and seal.

[0013] Furthermore, the drainage channel extends from the edge of the mating through hole of the first box body in a direction away from the second box body.

[0014] Furthermore, the circumferential wall of the base is an inclined wall with a diameter that gradually decreases along the axial direction towards the first housing, and the mating bottom surface of the second housing is set as a matching inclined wall.

[0015] 3. Beneficial effects Compared with the prior art, the technical solution provided by this invention has the following advantages: (1) In the anti-water accumulation structure of the present invention, the first box is installed on the axial end of the base. By using the positioning fit between the mounting column and the mounting hole of the base, the axial gap between the end face of the base and the bottom surface of the first box is effectively controlled and reasonably increased. The axial gap is used to form a drainage channel, so that the water flowing out through the unblocked threaded hole on the base can be directly discharged from the drainage gap, and will not accumulate between the base and the first box for a long time, thereby achieving effective anti-water accumulation of the pump body and improving safety.

[0016] (2) In the anti-water accumulation structure of the present invention, the bottom surface of the first box body is provided with multiple drainage grooves around the mating through hole at intervals. The drainage grooves can be used to guide the accumulated water out more effectively, and the depth of the drainage gap is further extended by the groove depth to provide more sufficient drainage space.

[0017] (3) In the anti-water accumulation structure of the present invention, the operating cylinder inside the first box is provided with a horn hole. When water flows into the operating cylinder through the unblocking threaded hole, it can be effectively guided by the wall of the horn hole to promote the water flow to the drainage gap at the rear end for discharge.

[0018] (4) The anti-water accumulation structure of the present invention has a flow guiding slope on the interface seat and the seat boss on the base, which can further adapt to the multi-angle installation scenario of the pump body. In particular, when the second box is located on the left and right sides, the seat boss or interface seat is located at the bottom, which facilitates bottom flow guiding. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the assembly structure of the pump unit's base and control box in the embodiment; Figure 2 This is a schematic cross-sectional view of the assembly structure of the base and the control box in the embodiment; Figure 3 This is a partially enlarged cross-sectional view of the unblocking structure within the pump unit in the embodiment. Figure 4 This is a schematic diagram of the base structure in the embodiment; Figure 5 This is a schematic diagram of the structure of the first housing of the control box in the embodiment; Figure 6 This is a schematic diagram of the first housing of the control box from another perspective in the embodiment; Figure 7 This is a partially enlarged structural diagram of the operating cylinder in the first box. Figure 8 This is a schematic diagram of the structure of the insulating box cover in the embodiment; Figure 9 This is a schematic diagram of the insulating box cover from another perspective in the embodiment; Figure 10 This is a schematic diagram of the metal box cover in the embodiment; Figure 11 This is a schematic diagram of the metal box cover from another perspective in the embodiment; Figure 12 This is a cross-sectional view of the fastening and mounting positions of the control box and the base in the embodiment.

[0020] Explanation of the labels in the diagram: 100. Base; 101. Mounting post; 102. Seat through hole; 103. Seat boss; 104. Interface seat; 105. Angled part A; 106. Angled part B; 107. Positioning rib; 110. Drainage gap; 200. First box body; 201. Drainage groove; 210. Step column; 211. Step A; 212. Step B; 213. Seat mounting hole; 220. Operating cylinder; 221. Operating through hole; 222. Sealing groove; 223. Cylinder protrusion ring; 300. Box cover; 310. Insulating inner cover; 311. Inner cover through hole; 312. Inner cover boss; 313. Inner cover mounting hole; 314. Press-fit part; 315. Heat dissipation hole; 320. Metal outer cover; 321. Through hole in outer cover; 322. Protruding ring in outer cover; 323. Boss in outer cover; 324. Mounting hole in outer cover; 325. Heat sink; 400. Fasteners; 500. Shielding sleeve; 501. Gasket; 502. Sealing ring; 503. Unblocking screw; 504. Protective sleeve; 600, Electrical control board; 700, Second box; 701, Mating bottom surface; 702, Positioning groove; 703, Hook and hanger. Detailed Implementation

[0021] To further understand the content of this invention, a detailed description of the invention will be provided in conjunction with the accompanying drawings.

[0022] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. The terms "first," "second," "third," and "fourth" should also be interpreted broadly, merely distinguishing feature names and not indicating a specific sequential relationship. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The present invention will be further described below with reference to embodiments.

[0025] Example Combination Figures 1-12 As shown, this embodiment provides a pump anti-water accumulation structure, including a base 100 and a control box. The axial end of the base 100 is provided with an outwardly extending unblocking structure, combined with... Figures 1-3 As shown, the unblocking structure is designed to effectively unblock the internal structure of the base 100. More specifically, in this embodiment, the pump is a canned pump with an internal shielding sleeve 500. The top of the base 100 has a seat through hole 102, and the shielding sleeve 500 extends outward beyond the seat through hole 102. The shielding sleeve 500 and the base 100 are sealed by a gasket 501. The top of the shielding sleeve 500 has a threaded hole for threaded assembly with the unblocking screw 503, and the two are sealed by a sealing ring 502. The unblocking screw 503 also has a protective sleeve 504 on its outer side, which is snapped onto the outside of the unblocking screw 503 to achieve a fixed connection with it. Thus, when using the unblocking screw 503 for unblocking, the protective sleeve 504 provides effective protection, facilitates the removal and installation of the unblocking screw 503, and avoids direct contact with the unblocking screw 503 that could cause burns.

[0026] In this embodiment, a control box is also provided at the axial end of the base 100. Specifically, the control box has a first box body 200, which is fitted and installed at the axial end of the base 100. In practice, the two are generally fastened together by locking screws. In this embodiment, in accordance with the unblocking structure, the first box body 200 is provided with a through-hole corresponding to the unblocking structure, namely, an operation through-hole 221. The unblocking structure can be opened by passing through the through-hole on the first box body 200, that is, the through-hole on the first box body 200 allows the sheath 504 to extend. In practice, the applicant has found that during the unblocking operation, some water may flow out through the unblocking threaded hole on the shielding sleeve 500, causing water to accumulate between the base 100 and the first box body 200 and unable to drain. Over time, water may enter the machine body and cause damage such as burn-out.

[0027] This embodiment further optimizes the installation of the base 100 and the first box 200 to address the coordination between the control box and the unblocking structure. Figure 4 and Figure 5 As shown, the end of the base 100 is provided with multiple sets of outwardly protruding mounting posts 101, and the bottom of the first housing 200 is provided with corresponding mounting holes 213. The mounting posts 101 are fitted into the mounting holes 213, and after the two are installed in place, there is an axial drainage gap 110 of at least 0.5 mm between the end face of the base 100 and the bottom surface of the first housing 200, which communicates with the outside. The mating through hole on the first housing 200 communicates with the drainage gap 110. Unlike the conventional approach of pursuing a tight fit, this embodiment utilizes the positioning fit of the mounting posts 101 and the mounting holes 213 to effectively control and reasonably increase the axial gap between the end face of the base 100 and the bottom surface of the first housing 200. This axial gap forms a drainage channel, allowing water flowing out through the unblocked threaded hole on the base 100 to be directly drained away through the drainage gap 110, preventing it from accumulating between the base 100 and the first housing 200 for a long time. This effectively prevents water accumulation in the pump body and improves safety.

[0028] It is particularly important to note that, in combination Figure 1 and Figure 5 As shown, the control box in this embodiment also includes a second box 700, which is distributed on the radially outer side of the base 100 and electrically connected to the first box 200. Electrical control components are respectively installed in the first box 200 and the second box 700. In practice, the first box 200 and the second box 700 together form the electrical control box. They can be integrally formed or independently formed. Both contain an electrical control board 600 and are electrically connected, working together to control the pump body. One box is located at the axial end of the base 100, and the other is located on the radially outer side of the base 100. This dual-box form, where the traditional control box is separated and distributed in different directions and orientations, effectively reduces the volume occupied by each box and each electrical control board, especially reducing the axial height occupation. This effectively improves the pump body's installation space adaptability. Compared to the traditional single-box radial side installation or axial end-face installation, it effectively provides installation flexibility and can adapt to installation in confined spaces. Therefore, this embodiment especially needs to consider the compatibility of the axial first box 200 installation and unblocking structure and the problem of preventing water accumulation.

[0029] More preferably, in this embodiment, the bottom surface of the first housing 200 is provided with multiple drainage grooves 201 spaced around the mating through hole, and the drainage grooves 201 extend to connect the mating through hole with the outside. The drainage grooves 201 can more effectively guide and drain accumulated water, and the depth of the grooves further extends the depth of the drainage gap 110, providing more ample drainage space. Figure 5As shown, more preferably, the drain groove 201 extends from the edge of the mating through hole of the first housing 200 in a direction away from the second housing 700. In practice, when installing the pump body, it is preferable to avoid placing the second housing 700 downwards, and instead place it upwards. Figure 1 The state shown can be either the second box 700 facing to the side or the drain groove 201 can be set to extend away from the second box 700, which can better meet the water flow direction in the actual installation state and facilitate the rapid discharge of water from the bottom or side in the multi-angle installation state.

[0030] Furthermore, the first housing 200 has an inwardly extending operating cylinder 220 along the direction away from the base 100. An operating through hole 221 is formed within the operating cylinder 220. This operating through hole 221 is the aforementioned mating through hole, through which the unblocking structure on the base 100 can be opened. Preferably, the operating through hole 221 is a flared hole with an opening that gradually increases in size along the axial direction towards the base 100. Figure 3 As shown, when water flows into the operating cylinder 220 through the unblocking threaded hole, it can be effectively guided by the wall of the horn hole to promote the flow of water to the drainage gap 110 at the rear end for discharge.

[0031] Combination Figure 4 As shown, in this embodiment, the base 100 has a through hole 102 at its center, which allows the unblocking structure and the shielding sleeve 500 to protrude outward from the base 100. An interface seat 104 protruding axially outward is also provided around the outside of the through hole 102 on the base 100. The interface seat 104 is used to install an adapter, allowing the power pin inside the base 100 to extend and electrically connect with the first housing 200. The wall surface of the interface seat 104 facing the through hole 102 is a sloped section B106. The sloped section B106 gradually decreases in height from the center to both ends along its length, thus forming a water flow guiding slope and promoting the outward discharge of accumulated water.

[0032] Similarly, further, the base 100 is provided with an outwardly protruding axially protruding boss 103 surrounding the outer side of the through hole 102. The wall surface of the boss 103 facing the through hole 102 is a sloped portion A105. The sloped portion A105 gradually decreases in height from the center to both ends along its length, forming a water flow guiding slope to facilitate rapid drainage of accumulated water. The boss 103 and the interface seat 104 are distributed on both sides of the through hole 102 radially, and the boss 103 and the interface seat 104 are also located at the two ends of the radial width of the second housing 700, meaning that neither the boss 103 nor the interface seat 104 is in the same radial direction as the second housing 700 in the first housing 200. Combined with... Figure 4 and Figure 5As shown, the bottom surface of the first housing 200 is also provided with a mating cavity corresponding to the position of the seat boss 103. Guide slopes are respectively provided on the seat boss 103 and the interface seat 104, which can further adapt to multi-angle installation scenarios of the pump body. Especially when the second housing 700 is located on the left or right side, the seat boss 103 or the interface seat 104 is located at the bottom, facilitating bottom flow guidance.

[0033] To further improve water accumulation prevention performance and enhance operational safety, combined with Figures 6-10 As shown, further, a protruding ring 223 is formed on the inner side of the top of the operating cylinder 220, and a sealing groove 222 is formed around the outer periphery of the protruding ring 223 on the end face of the operating cylinder 220. A cover 300 is mounted on the first box body 200, and an outer cover through hole 321 is provided on the cover 300 for the operating cylinder 220 to extend out. An outer cover protruding ring 322 is provided around the inner side of the outer cover through hole 321. The outer cover protruding ring 322 fits into the sealing groove 222 and seals it. Specifically, the sealing groove 222 is filled with soft rubber for sealing. The outer cover protruding ring 322 is correspondingly sleeved on the outer periphery of the protruding ring 223, forming an inner and outer nested structure and also forming a primary seal, reducing the flow of water from the operating cylinder 220 into the first box body 200. The sealing effect is further improved by the cooperation of the sealing groove 222 and the sealant, preventing water from flowing back into the first box body 200.

[0034] Furthermore, in this embodiment, the circumferential wall of the base 100 is an inclined wall with a diameter that gradually decreases along the axial direction towards the first housing 200, and the mating bottom surface 701 of the second housing 700 is set as a matching inclined wall; specifically, with Figure 5 Taking the case where the bottom surface 701 is located at the upper end of the first box 200 as an example, the height of the bottom surface 701 gradually increases in the direction away from the first box 200, so that it can be installed in a way that fits the inclined wall of the base 100. The installation gap between the two can also form a drainage channel. Even if the user makes a mistake in the installation direction and mistakenly places the second box 700 downwards, the water generated during the unblocking operation will flow downwards to the bottom surface 701, and the bottom surface 701 can also guide it outwards and discharge it out of the machine body, thus having a certain anti-water accumulation performance.

[0035] Furthermore, in this embodiment, the second box 700 and the first box 200 are integrally formed. The first box 200 and the base 100 are fixedly installed using bolts as fasteners 400. To ensure the installation stability of the second box 700, the circumferential wall of the base 100 is provided with axially extending positioning ribs 107, and the bottom of the second box 700 is provided with corresponding positioning grooves 702. Figure 4 and Figure 5As shown, specifically, positioning ribs 107 are provided on both sides of the wall of the base 100, and hook portions 703 extending inward are provided on both sides of the bottom surface 701, thereby forming a positioning groove 702 between the hook portions 703 on both sides. During installation, the positioning ribs 107 on both sides are embedded into the positioning groove 702 and cooperate with the hook portions 703 on both sides to achieve the guiding installation and stable assembly of the second box 700. In addition, preferably, the radial width between the positioning ribs 107 on both sides is basically adapted to the radial width of the second box 700, and the radial extension width of the corresponding positioning groove 702 basically covers the width of the second box 700. The hook portions 703 are respectively provided at the edge of the radial width of the bottom surface 701. In practice, if the user mistakenly installs the second box 700 downward, the water flowing out during the unblocking process can also flow as much as possible into the bottom surface 701 for drainage.

[0036] To achieve effective positioning and installation between the first housing 200 and the base 100, and to meet drainage requirements. Combined with Figure 6 and Figure 7 As shown, in this embodiment, the inner side of the first box 200 is provided with a stepped column 210, and a seat mounting hole 213 is formed in the stepped column 210. The stepped column 210 includes a lower stepped part A211 and an upper stepped part B212, wherein the diameter of the hole in the stepped part B212 is smaller than the diameter of the hole in the stepped part A211. The seat mounting hole 213 is a stepped hole with a larger bottom and a smaller top. The mounting column 101 is correspondingly assembled in the stepped part A211, and the top is limited by the stepped hole to ensure that the mounting column 101 and the seat mounting hole 213 can achieve precise positioning, and ensure the formation and size control of the drainage gap 110. The smaller stepped part B212 is also used as a positioning column for the electrical control board 600 in the box, reducing the space occupied by the electrical control board 600. The positioning hole on the electrical control board 600 is passed through and a limiting rib is set on the outer wall of the stepped part B212, so that the electrical control board 600 can be stably mounted on the stepped part B212. In addition, a sealing ring groove is provided around the bottom of the first box 200 surrounding the mounting hole 213. A corresponding annular protrusion is provided around the outer periphery of the mounting post 101 to fit into the sealing ring groove and be filled with soft glue for sealing, further ensuring the sealing between the first box 200 and the base 100 and preventing the generation of condensate.

[0037] The following further describes the lid 300 disposed on the first box body 200 in this embodiment. The lid 300 includes an insulating inner cover 310 and a metal outer cover 320, combined with... Figures 8 to 12As shown, the insulating inner cover 310 has an inner cover through hole 311 at its center for the unblocking structure to pass through. The insulating inner cover 310 also has a through heat dissipation hole 315 in the area corresponding to the power device on the internal control board 600. The insulating inner cover 310 also has a downward protruding inner cover boss 312 corresponding to the position of the seat mounting hole 213. The inner cover boss 312 forms an inner cover mounting hole 313, and the bottom of the inner cover boss 312 is also provided with a downward protruding pressing part 314 around the outer periphery of the inner cover mounting hole 313. During installation, the pressing part 314 is used to press and fix the lower control board 600, reducing stress damage to the control board 600.

[0038] Corresponding to the insulating inner cover 310, the metal outer cover 320 has a centrally located through-hole 321 for the unblocking structure to pass through, and a protruding outer cover ring 322, as mentioned above, is formed around the through-hole 321. A protruding heat sink 325 is provided on the metal outer cover 320 in the area corresponding to the heat dissipation hole 315. The heat sink 325 is embedded in the heat dissipation hole 315 for effective contact heat dissipation of the power device. Corresponding to the inner cover protrusion 312, the metal outer cover 320 also has a downwardly protruding outer cover protrusion 323, within which an outer cover mounting hole 324 is formed. Figure 12 As shown, during installation, fasteners 400 are used to pass through the outer cover mounting hole 324, the inner cover mounting hole 313, and the step post 210 in sequence and are threadedly fastened to the mounting post 101. Stable fit and installation and fixation between multi-layer structural components can be achieved with a single bolt.

[0039] The scope of protection of this invention is defined only by the claims. Thanks to the teachings of this invention, those skilled in the art will readily recognize that alternative structures to the structures disclosed herein can be used as feasible alternative implementations, and that the implementations disclosed herein can be combined to produce new implementations, which also fall within the scope of the appended claims.

Claims

1. A pump anti-water accumulation structure, comprising a base (100) and a control box, characterized in that: The axial end of the base (100) is provided with an outwardly extending unblocking structure. The control box has a first box body (200). The first box body (200) is fitted and installed on the axial end of the base (100). The first box body (200) is provided with a through-hole corresponding to the unblocking structure. The unblocking structure can be opened by passing through the through-hole on the first box body (200). The end of the base (100) is provided with multiple sets of outwardly protruding mounting posts (101), and the bottom of the first box (200) is provided with corresponding matching seat mounting holes (213). The mounting posts (101) are fitted into the seat mounting holes (213), and after installation, there is an axial drainage gap (110) between the end face of the base (100) and the bottom surface of the first box (200) to communicate with the outside. The matching through hole on the first box (200) is connected to the drainage gap (110).

2. The anti-water accumulation structure for a pump according to claim 1, characterized in that: The control box also includes a second box (700), which is distributed on the radial outer side of the base (100) and is electrically connected to the first box (200). The electronic control components are respectively installed in the first box (200) and the second box (700).

3. The anti-water accumulation structure for a pump according to claim 2, characterized in that: The bottom surface of the first box (200) is provided with multiple drainage grooves (201) around the mating through hole, and the drainage grooves (201) extend to connect the mating through hole with the outside.

4. A pump anti-water accumulation structure according to any one of claims 1-3, characterized in that: An operating cylinder (220) is provided inside the first housing (200) along the direction away from the base (100). An operating through hole (221) is formed inside the operating cylinder (220). The unblocking structure on the base (100) can be opened by passing through the operating through hole (221). The operating through hole (221) is a flared hole with an opening that gradually increases in size along the axial direction towards the base (100).

5. A pump anti-water accumulation structure according to any one of claims 1-3, characterized in that: The base (100) has a seat through hole (102) at the center of its end for the unblocking structure to protrude outward. The base (100) also has an outward protruding interface seat (104) around the outside of the seat through hole (102). The wall surface of the interface seat (104) facing the seat through hole (102) is a beveled part B (106). The beveled part B (106) gradually decreases in height from the center to both ends along its length.

6. The anti-water accumulation structure for a pump according to claim 5, characterized in that: The base (100) is provided with an outwardly protruding seat boss (103) around the seat through hole (102). The wall surface of the seat boss (103) facing the seat through hole (102) is a beveled part A (105). The height of the beveled part A (105) gradually decreases from the center to both ends along the length direction. The seat boss (103) and the interface seat (104) are distributed on both sides of the seat through hole (102) in the radial direction.

7. The anti-water accumulation structure for a pump according to claim 4, characterized in that: The top of the operating cylinder (220) has a cylinder protrusion ring (223) formed on the inner side, and the end face of the operating cylinder (220) has a sealing groove (222) formed around the outer periphery of the cylinder protrusion ring (223); the first box body (200) is equipped with a box cover (300), and the box cover (300) is provided with an outer cover through hole (321) for the operating cylinder (220) to extend out. The outer cover through hole (321) is surrounded by an outer cover protrusion ring (322) on the inner side, and the outer cover protrusion ring (322) is fitted into the sealing groove (222) and sealed.

8. The anti-water accumulation structure for a pump according to claim 1, characterized in that: The first box (200) has a stepped post (210) on its inner side, and a seat mounting hole (213) is formed in the stepped post (210). The stepped post (210) includes a stepped part A (211) at the bottom and a stepped part B (212) at the top. The diameter of the hole in the stepped part B (212) is smaller than the diameter of the hole in the stepped part A (211). The mounting post (101) is assembled in the stepped part A (211) and is limited at the top. The bottom of the first box (200) has a sealing ring groove around the outer periphery of the seat mounting hole (213). The outer periphery of the mounting post (101) has a corresponding annular protrusion that fits into the sealing ring groove and seals.

9. A pump anti-water accumulation structure according to claim 3, characterized in that: The drainage channel (201) extends from the edge of the mating through hole of the first box (200) in a direction away from the second box (700).

10. A pump anti-water accumulation structure according to claim 2, characterized in that: The circumferential wall of the base (100) is an inclined wall with a gradually decreasing diameter along the axial direction close to the first box (200), and the mating bottom surface (701) of the bottom of the second box (700) is set as a matching inclined wall.

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