Sand-proof, leakage-proof and anti-blocking deep-well pump

Abstract

The invention relates to a sand-preventing, leakage-preventing and anti-blocking deep-well pump which comprises a shell, a sand-preventing structure and a main shaft. The large-opening end of the static sand-prevention conical sleeve is fixed to the supporting inner cylinder. The mechanical seal is located on the side, away from the pump cavity, of the static sand-prevention conical sleeve. The large opening end of the movable sand prevention conical sleeve is coaxially, rotationally and hermetically connected with the small opening end of the static sand prevention conical sleeve; an annular groove is formed in the static sand prevention conical sleeve, and the outer peripheral wall of the large-opening end of the movable sand prevention conical sleeve abuts against the inner wall of the annular groove; the static sand prevention conical sleeve is provided with a convex ring, the movable sand prevention conical sleeve is provided with an abutting wall, the abutting wall is provided with an anti-friction ring, and the convex ring rotationally abuts against the anti-friction ring. According to the scheme, the outer peripheral wall of the large opening end of the movable sand prevention conical sleeve abuts against the inner wall of the annular groove, the convex ring abuts against the abutting wall through the anti-friction ring, the oil seal is arranged, the end, facing the driving cavity, of the coupler is tightly held through the horn ring, the quadruple sand prevention effect is achieved, the mechanical seal is not prone to being damaged by sand, the sealing performance of the driving cavity is good, and the service life of the deep-well pump is prolonged.

Description

Technical Field

[0001] The present application relates to the field of water pumps, and in particular to a sand-proof, leakage-proof and blockage-proof deep well pump. Background Art

[0002] A deep well pump is a water-lifting machine that is directly connected to a motor and a water pump and works in water. It is suitable for extracting groundwater from deep wells. It has high waterproof and pressure resistance and can also be used in water-lifting projects such as rivers, reservoirs, and canals. The deep well pump mainly includes a casing, in which a pump chamber for installing an impeller assembly and a drive chamber for installing a stator and a rotor are arranged. The main shaft runs through the pump chamber and the drive chamber. However, when the deep well pump is working, the high-speed rotation of the main shaft brings in debris, especially sand, which enters the rotating seal connection between the main shaft and the casing, affecting the rotation stability of the main shaft. In severe cases, it causes water seepage in the drive chamber, reducing the life of the deep well pump. Summary of the invention

[0003] In order to increase the service life of a deep well pump, the present application provides a sand-proof, leakage-proof and blockage-proof deep well pump.

[0004] The present application provides a sand-proof, leakage-proof and blockage-proof deep well pump, which adopts the following technical solution: The sand-proof, leakage-proof and blockage-proof deep well pump comprises a housing, a sand-proof structure and a main shaft, wherein a driving chamber and a pump chamber are arranged in the housing, and the sand-proof structure comprises a supporting inner cylinder, a dynamic sand-proof conical sleeve and a static sand-proof conical sleeve; The circumferential outer wall of the supporting inner cylinder is sealed against the inner wall of the fixed housing, a mechanical seal is arranged in the supporting inner cylinder, and the main shaft is rotatably connected to the supporting inner cylinder through the mechanical seal; The large end of the static sand prevention cone sleeve is fixed to the supporting inner cylinder, the small end of the static sand prevention cone sleeve faces the pump chamber, and the mechanical seal is located on the side of the static sand prevention cone sleeve away from the pump chamber; the static sand prevention cone sleeve is a hard part, and the dynamic sand prevention cone sleeve is a flexible part. The large end of the dynamic sand prevention cone sleeve is coaxially rotatably sealed and connected to the small end of the static sand prevention cone sleeve, the small end of the dynamic sand prevention cone sleeve is tightly fixed to the main shaft, and the small end of the dynamic sand prevention cone sleeve faces the pump chamber; The small end of the static sand prevention cone sleeve is provided with an annular groove on the end surface facing the pump chamber, the large end of the dynamic sand prevention cone sleeve is rotatably plugged into the annular groove, and the outer peripheral wall of the large end of the dynamic sand prevention cone sleeve is pressed against the inner wall of the annular groove; The inner wall of the small-mouth end of the static sand-control conical sleeve is extended toward the pump chamber and is provided with a convex ring. The inner wall of the large-mouth end of the dynamic sand-control conical sleeve is provided with an abutment wall. The abutment wall is provided with an anti-friction ring. The convex ring rotates to press against the anti-friction ring.

[0005] By adopting the above technical solution, the main shaft is rotatably connected to the supporting inner cylinder through a mechanical seal. The mechanical seal divides the inner cavity of the main shaft into a pump cavity and a drive cavity. The drive cavity is a closed space for installing the stator and the rotor. The supporting inner cylinder is used for the installation of the mechanical seal, and at the same time, the main shaft support is connected to the center of the outer shell. The dynamic sand prevention cone sleeve is tightly held on the main shaft, the large end of the static sand prevention cone sleeve is fixed to the supporting inner cylinder, and the small end is coaxially rotatably connected to the large end of the dynamic sand prevention cone sleeve. The conical structure is set so that the water pressure in the pump cavity is unloaded through the conical surface away from the connection between the dynamic sand prevention cone sleeve and the main shaft, and away from the connection between the dynamic sand prevention cone sleeve and the static sand prevention cone sleeve, so that sand is not easy to enter the dynamic sand prevention cone sleeve and the static sand prevention cone sleeve.

[0006] The outer peripheral wall of the large mouth end of the dynamic sand-proof conical sleeve is pressed against the inner wall of the ring groove, which is a single layer of sand prevention. The convex ring is pressed against the abutment wall through the anti-friction ring, which is a double layer of sand prevention. The double sand-proof structure has a good sand-proof effect, and sand is not easy to contact the mechanical seal, and sand is not easy to damage the mechanical seal, so that the main shaft rotation stability is good, the driving chamber is not easy to seep water, and the deep well pump has a long service life.

[0007] Optionally, an oil seal is provided in the supporting inner cylinder, and the oil seal is provided between the mechanical seal and the static sand prevention conical sleeve, and the main shaft is rotatably connected to the supporting inner cylinder through the oil seal.

[0008] By adopting the above technical solution, the oil seal further improves the sealing performance of the drive chamber and has a triple sand prevention effect.

[0009] Optionally, a trumpet ring is provided at the small-mouth end of the dynamic sand-control conical sleeve, and the inner diameter of the trumpet ring increases in the direction away from the dynamic sand-control conical sleeve; the main shaft includes a central shaft, a drive shaft and a coupling, and the central shaft and the drive shaft are coaxially fixed by a coupling; the coupling is located on the side of the trumpet ring away from the dynamic sand-control conical sleeve, and the inner wall of the trumpet ring is pressed against the end of the coupling.

[0010] By adopting the above technical solution, the horn ring covers one end of the coupling, making it difficult for sand to enter the clamping point between the coupling and the drive shaft, so that the coupling maintains a clamping effect and prevents loosening.

[0011] Optionally, the outer diameter of the end of the coupling close to the horn ring decreases towards the horn ring, and the horn ring is tightly embraced by the end of the coupling close to the horn ring.

[0012] By adopting the above technical solution, the outer diameter of the end of the coupling close to the horn ring is reduced in the direction close to the horn ring, thereby increasing the clamping area and improving the sand prevention effect.

[0013] Optionally, it also includes an anti-blocking component, which includes a cleaning ring and a driving structure, the inner wall of the cleaning ring is fixed with bristles, the outer wall of the outer shell includes a water-permeable area, the water-permeable area is provided with a plurality of water-permeable holes, and the water-permeable holes are connected to the pump chamber; the cleaning ring is sleeved on the water-permeable area, and the bristles slide and contact the water-permeable area; the driving structure drives the cleaning ring to slide back and forth along the axis of the main shaft.

[0014] By adopting the above technical solution, the driving structure drives the cleaning ring to move back and forth, and the bristles brush the surface of the water-permeable area to remove the debris attached to the water-permeable holes, so that the deep well pump can inlet water freely and is not easy to be blocked.

[0015] Optionally, the driving structure comprises a main bevel gear, a secondary bevel gear and a driving gear, the main bevel gear is coaxially fixed to the main shaft, the secondary bevel gear is rotatably connected to the inner side of the housing by setting a rotating shaft, the rotating shaft is perpendicular to the main shaft, and the secondary bevel gear meshes with the main bevel gear; The driving gear is rotatably connected to the outer wall of the housing through a rotating shaft, a driving plate corresponding to the driving gear is arranged on the cleaning ring, the length direction of the driving plate is parallel to the axis direction of the main shaft, a driving groove is provided on the driving plate, and tooth surfaces are arranged on the inner walls on both sides of the width direction of the driving groove, and a tooth portion is arranged on the arc surface of 115-125 degrees on the outer peripheral surface of the driving gear, and the driving gear meshes with the tooth surface; When the tooth surface of the driving gear meshing with the driving groove on one side rotates, the driving plate slides in direction a along the axis of the main shaft. When the tooth surface of the driving gear meshing with the driving groove on the other side rotates, the driving plate slides in direction b along the axis of the main shaft. Directions a and b are opposite.

[0016] By adopting the above technical solution, when the main shaft rotates, the auxiliary bevel gear is driven to rotate, thereby driving the driving gear to rotate. Since the 115-125 degree arc surface of the outer peripheral surface of the driving gear is provided with a tooth portion, when the driving gear meshes with the tooth surface on one side of the driving groove and rotates, the driving plate slides in the direction of a. After the driving gear is located at one end of the driving groove, the driving gear continues to rotate, the tooth portion disengages from the tooth surface on this side, and meshes with the tooth surface on the other side of the driving groove. The driving gear continues to rotate, driving the driving plate to slide in the direction of b, and this cycle is used to achieve reciprocating sliding.

[0017] Optionally, a first stabilizing frame is disposed on the outer wall of the shell, and a first stabilizing frame is provided with a first stabilizing groove for the driving plate to slide.

[0018] By adopting the above technical solution, the sliding of the driving plate is stabilized, a stabilizing plate is arranged on the cleaning ring, the stabilizing plate and the driving plate are located on two symmetrical sides of the main axis, a second stabilizing frame is arranged on the outer wall of the shell, a second stabilizing frame is provided with a second stabilizing groove for the sliding of the stabilizing plate, and the wall of the second stabilizing groove slides and contacts the side wall of the stabilizing plate.

[0019] By adopting the above technical solution, the sliding of the cleaning ring is further guided to improve the sliding stability.

[0020] In summary, the present application includes at least one of the following beneficial technical effects: 1. The outer peripheral wall of the large-mouth end of the dynamic sand-proof conical sleeve is pressed against the inner wall of the ring groove, and the convex ring is pressed against the abutment wall through the anti-friction ring. An oil seal is provided and the end of the coupling facing the drive chamber is tightly embraced by the horn ring, so as to achieve a quadruple sand-proof effect, making it difficult for sand to damage the mechanical seal, making the drive chamber airtight, and prolonging the service life of the deep well pump; 2. The rotation of the main shaft drives the main bevel gear to rotate, thereby driving the auxiliary bevel gear and the driving gear to rotate. The driving gear cooperates with the tooth surface to drive the driving plate to slide back and forth along the axis of the main shaft, so that the bristles on the cleaning ring clean the surface of the water-permeable area to prevent the pump body from being blocked; 3. The first stabilizing frame and the second stabilizing frame guide the sliding of the driving plate and the stabilizing plate to improve the sliding stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an overall schematic diagram of Example 1.

[0022] Figure 2 This is a cross-sectional view of Example 1.

[0023] Figure 3 This is a structural display diagram of the sand-proof structure of Example 1.

[0024] Figure 4 yes Figure 3 A magnified view of point A.

[0025] Figure 5 This is a diagram showing the outer structure of the water permeable area of ​​Example 2.

[0026] Figure 6 This is a diagram showing the structure of the inner side of the water-permeable area of ​​Example 2.

[0027] Figure 7 This is a structural diagram showing the drive plate and drive gear of Example 2.

[0028] Explanation of reference numerals: 1. housing; 11. drive chamber; 111. stator; 112. rotor; 12. pump chamber; 121. impeller; 13. water-permeable area; 131. water-permeable hole; 2. sand-proof structure; 21. supporting inner cylinder; 22. dynamic sand-proof conical sleeve; 221. abutting wall; 222. horn ring; 23. static sand-proof conical sleeve; 231. ring groove; 232. convex ring; 24. anti-friction ring; 3. main shaft; 31. central shaft; 32. drive shaft; 33. coupling; 4. bearing; 5. machine Mechanical seal; 6. Oil seal; 7. Anti-blocking assembly; 71. Cleaning ring; 711. Brush; 72. Driving structure; 721. Main bevel gear; 722. Sub bevel gear; 723. Driving gear; 7231. Tooth; 724. Driving plate; 7241. Driving groove; 7242. Tooth surface; 725. Rotating shaft; 7243. First extended tooth; 7244. Second extended tooth; 8. First stabilizing frame; 81. First stabilizing groove; 9. Second stabilizing frame; 91. Second stabilizing groove; 10. Stabilizing plate. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings.

[0030] Example 1 Example 1 of the present application discloses a sand-proof, leak-proof and blockage-proof deep well pump. Figure 1 , Figure 2 The sand-proof, leakage-proof and blockage-proof deep well pump comprises a housing 1, a sand-proof structure 2 and a main shaft 3. A driving chamber 11 and a pump chamber 12 are arranged in the housing 1, and the main shaft 3 passes through the driving chamber 11 and the pump chamber 12. A stator 111 and a rotor 112 are installed in the driving chamber 11, and the rotor 112 is connected to the main shaft 3. A plurality of impellers 121 are coaxially installed in the pump chamber 12, and the plurality of impellers 121 are coaxially fixed to the main shaft 3. The outer wall of the pump chamber 12 near one end of the driving chamber 11 is a water-permeable area 13, and a plurality of water-permeable holes 131 are distributed on the water-permeable area 13, and the water-permeable holes 131 are connected to the pump chamber 12. The impeller 121 is located on the side of the water-permeable area 13 away from the driving chamber 11.

[0031] Reference Figure 2 , Figure 3 The sand control structure 2 includes a supporting inner cylinder 21, a dynamic sand control cone sleeve 22 and a static sand control cone sleeve 23. The circumferential outer wall of the supporting inner cylinder 21 seals the inner wall of the fixed housing 1, and a bearing 4 and a mechanical seal 5 are arranged in the supporting inner cylinder 21. The bearing 4 and the mechanical seal 5 are coaxially connected to the main shaft 3, and the bearing 4 is located at the end of the mechanical seal 5 away from the pump chamber 12. The main shaft 3 is connected to the supporting inner cylinder 21 through the bearing 4 and the mechanical seal 5 to rotate in a sealed manner.

[0032] Reference Figure 3 , Figure 4The static sand prevention cone sleeve 23 is a hard part. In Example 1, the static sand prevention cone sleeve 23 is a hard plastic part. The large end of the static sand prevention cone sleeve 23 is sleeved and fixed to the end of the supporting inner cylinder 21 facing the pump chamber 12, and the small end of the static sand prevention cone sleeve 23 faces the pump chamber 12. The mechanical seal 5 is located on the side of the static sand prevention cone sleeve 23 away from the pump chamber 12.

[0033] Reference Figure 3 , Figure 4 The dynamic sand prevention cone sleeve 22 is a flexible member. In Embodiment 1, the dynamic sand prevention cone sleeve 23 is made of flexible rubber material. The large end of the dynamic sand prevention cone sleeve 22 is coaxially rotatably sealed and connected to the small end of the static sand prevention cone sleeve 23. The small end of the dynamic sand prevention cone sleeve 22 is tightly fixed to the main shaft 3, and the small end of the dynamic sand prevention cone sleeve 22 faces the pump chamber 12. The outer walls of the static sand prevention cone sleeve 23 and the dynamic sand prevention cone sleeve 22 have the same inclination angle, so that the connection between the two is smoothly transitioned.

[0034] Reference Figure 3 , Figure 4 The small end of the static sand prevention cone sleeve 23 is provided with an annular groove 231 on the end surface facing the pump chamber 12, and the large end of the dynamic sand prevention cone sleeve 22 is rotatably inserted into the annular groove 231, and the outer peripheral wall of the large end of the dynamic sand prevention cone sleeve 22 is pressed against the inner wall of the annular groove 231, so that the two are tightly connected, thereby achieving a better sand prevention effect.

[0035] Reference Figure 3 , Figure 4 The inner wall of the small end of the static sand prevention cone sleeve 23 extends toward the pump chamber 12 and is integrally formed with a convex ring 232. The inner wall of the large end of the dynamic sand prevention cone sleeve 22 is provided with an abutment wall 221, and an anti-friction ring 24 is provided on the abutment wall 221. The convex ring 232 rotates and abuts against the anti-friction ring 24. The anti-friction ring 24 is a metal gasket, which reduces the friction of the static sand prevention cone sleeve 23 and the dynamic sand prevention cone sleeve 22 when they rotate relative to each other, making them less prone to wear and extending the service life of the sand prevention structure 2.

[0036] Reference Figure 4 An oil seal 6 is arranged in the support inner cylinder 21 , and the oil seal 6 is arranged between the mechanical seal 5 and the static sand prevention conical sleeve 23 . The oil seal 6 is sleeved on the main shaft 3 , and the main shaft 3 is rotatably connected to the support inner cylinder 21 through the oil seal 6 .

[0037] Reference Figure 2 , Figure 3 , Figure 4 The small end of the dynamic sand control cone sleeve 22 is integrally formed with a horn ring 222, and the inner diameter of the horn ring 222 increases in the direction away from the dynamic sand control cone sleeve 22. The main shaft 3 includes a central shaft 31, a drive shaft 32 and a coupling 33, the rotor 112 is connected to the drive shaft 32, the impeller 121 is installed on the central shaft 31, the central shaft 31 and the drive shaft 32 are coaxially fixed by the coupling 33, and the coupling 33 is located in the water permeable area 13.

[0038] Reference Figure 4 The coupling 33 is located on the side of the horn ring 222 away from the dynamic sand prevention conical sleeve 22. The outer diameter of the end of the coupling 33 close to the horn ring 222 decreases towards the horn ring 222. The horn ring 222 is tightly held to the end of the coupling 33 close to the horn ring 222. The inner wall of the horn ring 222 is pressed against the end face of the coupling 33 to prevent sand from entering the gap between the coupling 33 and the drive shaft 32, so that the coupling 33 can stably connect the drive shaft 32 and the center shaft 31.

[0039] When pumping water, water moves toward the pump chamber 12 through the water permeable hole 131. The water pressure at the end of the coupling 33 facing the drive chamber 11 is higher. The horn ring 222 is arranged to hug the end of the coupling 33 cover to prevent sand from entering the coupling 33, thereby ensuring a stable connection between the center shaft 31 and the drive shaft 32.

[0040] The implementation principle of the sand-proof, leakage-proof and blockage-proof deep-well pump in Example 1 of the present application is as follows: the outer peripheral wall of the large-mouth end of the dynamic sand-proof conical sleeve 22 is pressed against the inner wall of the annular groove 231, which is a single-layer sand-proof, the convex ring 232 is pressed against the abutment wall 221 through the anti-friction ring 24, which is a double-layer sand-proof, the oil seal 6 is a triple-layer sand-proof, and the end of the coupling 33 toward the drive chamber 11 is held tightly by the horn ring 222, which is a quadruple-layer sand-proof. The present application adopts a quadruple-layer sand-proof scheme, so that sand is not easy to damage the mechanical seal 5, the coupling 33, and the rotation of the deep-well pump is stable. At the same time, the airtightness of the drive chamber 11 is good, and the service life of the deep-well pump is improved.

[0041] Example 2 Embodiment 2 of the present application also discloses a sand-proof, leak-proof and blockage-proof deep well pump, referring to Figure 5 , Figure 6 , which is different from Example 1, the anti-sand, anti-leakage and anti-blocking deep well pump further comprises an anti-blocking assembly 7, which comprises a cleaning ring 71 and a driving structure 72. The inner wall of the cleaning ring 71 is fixed with bristles 711, which are rubber columns with a reduced cross-sectional area at the tip and a diameter of 2-3 mm. The cleaning ring 71 is sleeved on the outer side of the water permeable area 13, and the bristles 711 slide and contact the outer wall of the water permeable area 13. The driving structure 72 drives the cleaning ring 71 to slide back and forth along the axis direction of the main shaft 3, thereby cleaning the debris outside the water permeable hole 131, so that the deep well pump is not easily blocked and maintains a large flux.

[0042] Reference Figure 6 The driving structure 72 includes a main bevel gear 721, a secondary bevel gear 722 and a driving gear 723. The main bevel gear 721 is coaxially fixed to the main shaft 3, and the main bevel gear 721 is coaxially fixed to the outer wall of the coupling 33, so that the driving structure 72 is not easy to affect the stability of the main shaft 3. The secondary bevel gear 722 is rotatably connected to the inner side of the housing 1 by setting a rotating shaft 725, and the rotating shaft 725 is perpendicular to the main shaft 3. The secondary bevel gear 722 meshes with the main bevel gear 721.

[0043] Reference Figure 6 , Figure 7 The driving gear 723 is coaxially fixed to the end of the rotating shaft 725 away from the secondary bevel gear 722, and the driving gear 723 is rotatably connected to the outer wall of the housing 1 through the rotating shaft 725. A driving plate 724 corresponding to the driving gear 723 is fixed on the cleaning ring 71, and the length direction of the driving plate 724 is parallel to the axis direction of the main shaft 3. A driving groove 7241 is opened on the driving plate 724, and the driving gear 723 is located in the driving groove 7241.

[0044] Reference Figure 7 The inner walls on both sides of the width direction of the driving groove 7241 are provided with tooth surfaces 7242, and the arc surface portion of 115-125 degrees on the outer peripheral surface of the driving gear 723 is provided with a tooth portion 7231. In Example 2, the arc surface of the driving gear 723 provided with the tooth portion 7231 is 120 degrees. The tooth portion 7231 is used to mesh with the tooth surface 7242. The first extended tooth 7243 is fixed on the tooth surface 7242 on one side close to the pump chamber 12, and the second extended tooth 7244 is fixed on the tooth surface 7242 on the other side close to the end of the driving chamber 11. The first extended tooth 7243 and the second extended tooth 7244 facilitate the tooth portion 7231 to abut against the tooth surface 7242 when replacing the tooth surface 7242.

[0045] Reference Figure 6 , Figure 7 When the driving gear 723 engages with the tooth surface 7242 on one side of the driving groove 7241 and rotates, the driving plate 724 slides in the direction a along the axis of the main shaft 3. When the driving gear 723 moves to one end of the driving groove 7241, the tooth portion 7231 disengages from the current tooth surface 7242 and engages with the tooth surface 7242 on the other side by abutting against the second extended tooth 7244. When the driving gear 723 engages with the tooth surface 7242 on the other side of the driving groove 7241 and rotates, the driving plate 724 slides in the direction b along the axis of the main shaft 3. The directions a and b are opposite, thereby realizing the reciprocating sliding of the driving plate 724 and causing the cleaning ring 71 to slide back and forth.

[0046] Reference Figure 6 The outer wall of the housing 1 is provided with a first stabilizing frame 8, and the first stabilizing frame 8 is provided with a first stabilizing groove 81 for the driving plate 724 to slide, and the groove wall of the first stabilizing groove 81 slides and contacts the side wall of the first stabilizing groove 81. The cleaning ring 71 is fixed with a stabilizing plate 10, and the stabilizing plate 10 and the driving plate 724 are located on both sides of the main shaft 3 symmetrically. The outer wall of the housing 1 is fixed with a second stabilizing frame 9, and the second stabilizing frame 9 is provided with a second stabilizing groove 91 for the stabilizing plate 10 to slide, and the groove wall of the second stabilizing groove 91 slides and contacts the side wall of the stabilizing plate 10.

[0047] The implementation principle of the sand-proof, leakage-proof and blockage-proof deep well pump in Example 2 of the present application is as follows: when the deep well pump is in use, the main shaft 3 rotates to drive the main bevel gear 721 to rotate, thereby driving the secondary bevel gear 722 and the driving gear 723 to rotate, and the driving gear 723 cooperates with the tooth surface 7242 to drive the driving plate 724 to slide back and forth along the axis of the main shaft 3, so that the bristles 711 on the cleaning ring 71 clean the surface of the water permeable area 13 to prevent the pump body from being blocked, thereby achieving a large flux effect.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sand-proof, seepage-proof and blockage-proof deep well pump, comprising a housing (1), a sand-proof structure (2) and a main shaft (3), wherein a driving chamber (11) and a pump chamber (12) are arranged in the housing (1), and characterized in that: The sand control structure (2) comprises a supporting inner cylinder (21), a dynamic sand control conical sleeve (22) and a static sand control conical sleeve (23); The circumferential outer wall of the supporting inner cylinder (21) seals the inner wall of the fixed outer shell (1), a mechanical seal (5) is arranged in the supporting inner cylinder (21), and the main shaft (3) is connected to the supporting inner cylinder (21) in a sealing and rotatable manner through the mechanical seal (5); The large end of the static sand prevention conical sleeve (23) is fixed to the supporting inner cylinder (21), the small end of the static sand prevention conical sleeve (23) faces the pump chamber (12), and the mechanical seal (5) is located on the side of the static sand prevention conical sleeve (23) away from the pump chamber (12); the static sand prevention conical sleeve (23) is a hard part, and the dynamic sand prevention conical sleeve (22) is a flexible part. The large end of the dynamic sand prevention conical sleeve (22) is coaxially rotatably sealed and connected to the small end of the static sand prevention conical sleeve (23), the small end of the dynamic sand prevention conical sleeve (22) is tightly fixed to the main shaft (3), and the small end of the dynamic sand prevention conical sleeve (22) faces the pump chamber (12); The small-mouth end of the static sand-control conical sleeve (23) is provided with an annular groove (231) on the end surface facing the pump chamber (12), and the large-mouth end of the dynamic sand-control conical sleeve (22) is rotatably inserted into the annular groove (231), and the outer peripheral wall of the large-mouth end of the dynamic sand-control conical sleeve (22) is tightly pressed against the inner wall of the annular groove (231); The inner wall of the small-mouth end of the static sand-proof conical sleeve (23) is provided with a convex ring (232) extending toward the pump chamber (12), and the inner wall of the large-mouth end of the dynamic sand-proof conical sleeve (22) is provided with an abutment wall (221), and an anti-friction ring (24) is provided on the abutment wall (221), and the convex ring (232) rotates to press against the anti-friction ring (24).

2. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 1 is characterized by: An oil seal (6) is arranged in the supporting inner cylinder (21), and the oil seal (6) is arranged between the mechanical seal (5) and the static sand prevention conical sleeve (23). The main shaft (3) is connected to the supporting inner cylinder (21) in a sealed and rotatable manner through the oil seal (6).

3. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 2 is characterized by: A trumpet ring (222) is provided at the small-mouth end of the dynamic sand-control conical sleeve (22), and the inner diameter of the trumpet ring (222) increases in a direction away from the dynamic sand-control conical sleeve (22); the main shaft (3) comprises a central shaft (31), a driving shaft (32) and a coupling (33), and the central shaft (31) and the driving shaft (32) are coaxially fixed via the coupling (33); the coupling (33) is located on the side of the trumpet ring (222) away from the dynamic sand-control conical sleeve (22), and the inner wall of the trumpet ring (222) is pressed against the end of the coupling (33).

4. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 3 is characterized by: The outer diameter of the end of the coupling (33) close to the horn ring (222) decreases towards the direction close to the horn ring (222), and the horn ring (222) is tightly embraced by the end of the coupling (33) close to the horn ring (222).

5. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 1 is characterized by: The invention also comprises an anti-blocking component (7), the anti-blocking component (7) comprising a cleaning ring (71) and a driving structure (72), the inner wall of the cleaning ring (71) being provided with bristles (711), the outer wall of the housing (1) comprising a water-permeable area (13), the water-permeable area (13) being provided with a plurality of water-permeable holes (131), the water-permeable holes (131) being connected to the pump chamber (12); the cleaning ring (71) being sleeved on the water-permeable area (13), the bristles (711) slidingly contacting the water-permeable area (13); and the driving structure (72) driving the cleaning ring (71) to slide back and forth along the axis direction of the main shaft (3).

6. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 5 is characterized by: The driving structure (72) comprises a main bevel gear (721), a secondary bevel gear (722) and a driving gear (723); the main bevel gear (721) is coaxially fixed to the main shaft (3); the secondary bevel gear (722) is rotatably connected to the inner side of the housing (1) by providing a rotating shaft (725); the rotating shaft (725) is perpendicular to the main shaft (3); and the secondary bevel gear (722) meshes with the main bevel gear (721); The driving gear (723) is rotatably connected to the outer wall of the housing (1) via a rotating shaft (725); a driving plate (724) corresponding to the driving gear (723) is provided on the cleaning ring (71); the length direction of the driving plate (724) is parallel to the axial direction of the main shaft (3); a driving groove (7241) is provided on the driving plate (724); tooth surfaces (7242) are provided on the inner walls of both sides of the driving groove (7241) in the width direction; a tooth portion (7231) is provided on the arc surface portion of 115-125 degrees on the outer circumferential surface of the driving gear (723); and the driving gear (723) meshes with the tooth surface (7242); When the tooth surface (7242) on one side of the driving groove (7241) engaged with the driving gear (723) rotates, the driving plate (724) slides in direction a along the axis of the main shaft (3); when the tooth surface (7242) on the other side of the driving groove (7241) engaged with the driving gear (723) rotates, the driving plate (724) slides in direction b along the axis of the main shaft (3); directions a and b are opposite.

7. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 6 is characterized by: The outer wall of the housing (1) is provided with a first stabilizing frame (8), the first stabilizing frame (8) is provided with a first stabilizing groove (81) for the driving plate (724) to slide, and the groove wall of the first stabilizing groove (81) slides and contacts the side wall of the first stabilizing groove (81).

8. The anti-sand, anti-leakage and anti-blocking deep well pump according to claim 6 is characterized by: The cleaning ring (71) is provided with a stabilizing plate (10), the stabilizing plate (10) and the driving plate (724) are located on two symmetrical sides of the main shaft (3), the outer wall of the housing (1) is provided with a second stabilizing frame (9), the second stabilizing frame (9) is provided with a second stabilizing groove (91) for the stabilizing plate (10) to slide, and the groove wall of the second stabilizing groove (91) slides and contacts the side wall of the stabilizing plate (10).

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