Bidirectional submersible tubular pump with stable flow state in guide vane body

Abstract

The application belongs to the technical field of water pumps, and particularly relates to a bidirectional submersible tubular pump with stable flow state in a guide vane body, which comprises a cylindrical first shell, the front end of the first shell is connected with a second shell, the second shell is composed of two conical cylinder bodies, the smaller ends of the two cylinder bodies are connected together, and a motor is arranged at the shaft center of the first shell. The auger blade is arranged, in the working process of the impeller, the auger blade can rotate together under the driving of the fixed shaft, with the rotation of the auger blade, the auger blade can accelerate the water flow to push the water flow to the direction of the impeller, so that the pressure of the water flow to the impeller is greatly increased, the pressure at the inlet of the main impeller is higher than the vaporization pressure of the liquid, and with the change of the water flow speed, the auger blade can also extrude the water flow to the direction of the impeller in cooperation with the first damping spring, so that the possibility of cavitation of the impeller is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of water pump technology, and particularly relates to a bidirectional submersible axial flow pump with stable internal flow of the guide vane body. Background Technology

[0002] A cross-flow pump is a special type of impeller pump. Its impeller shaft is placed horizontally, and the impeller blades are open, generally with a slender shape. Liquid flows axially into the pump from the inlet, performs work through the rotation of the impeller, and then flows axially out from the outlet, as if the water flow "throughs" the entire pump body, hence the name cross-flow pump.

[0003] Existing axial flow pumps lack suitable protective devices for their impellers. Therefore, during operation, when the liquid pressure at the impeller inlet is lower than the liquid's saturated vapor pressure at that temperature, the liquid vaporizes, forming numerous small bubbles of vapor and gas. These bubbles, as they enter the high-pressure zone, rapidly condense and burst, generating high-frequency impact forces that damage the surfaces of the impeller and other flow-through components. Furthermore, besides impeller damage from bubbles, the interaction between the impeller and the fluid, as well as friction and collisions between mechanical parts, cause vibrations in the pump's shaft as water flows through the pump body, further affecting the pump's stable operation.

[0004] Therefore, it is necessary to invent a bidirectional submersible cross-flow pump with stable internal flow in the guide vane body to solve the above problems. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a bidirectional submersible cross-flow pump with stable internal flow within the guide vane body, thereby resolving the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a bidirectional submersible cross-flow pump with stable internal flow of the guide vane body, comprising a cylindrical first housing, a second housing connected to the front end of the first housing, the second housing being composed of two conical cylindrical sections, with the smaller ends of the two sections connected together, a motor disposed at the axis of the first housing, a plurality of fixing blocks fixedly connected between the outer side of the motor and the inner wall of the first housing, an output shaft being drivenly connected to the end of the motor near the second housing, an impeller mounted on the output shaft, a fixed shaft being drivenly connected to the free end of the output shaft, and the edge of the fixed shaft near the impeller protruding outward, a sleeve sleeved on the fixed shaft, a buffer assembly disposed inside the sleeve, and a fixed component on the outer wall of the sleeve. The sleeve is connected to auger blades. Two limiting blocks are symmetrically fixedly connected to the inner wall of the sleeve. Two limiting grooves are symmetrically opened on the surface of the fixed shaft along the length of the fixed shaft, and the two limiting blocks are slidably installed in the two limiting grooves respectively. A baffle is provided at the free end of the sleeve. The baffle is slidably sleeved on the fixed shaft. The baffle is connected to the fixed shaft by screws. A support plate is provided at the end of the sleeve away from the baffle. A first damping spring is connected to the end of the support plate away from the fixed shaft. The first damping spring is sleeved on the fixed shaft. The end of the first damping spring away from the support plate is fixedly connected to the protruding part of the end of the fixed shaft. Multiple support components are provided between the outer side of the support plate and the inner wall of the second housing. Two sets of mounting brackets are installed at the bottom of the first housing.

[0007] Furthermore, the buffer assembly includes several cylindrical top blocks, which are vertically slidably inserted into the surface of the fixed shaft. A ball bearing is rotatably mounted on one end of the top block outside the fixed shaft, and a buffer spring is fixedly connected between the end of the top block inside the fixed shaft and the interior of the fixed shaft. A groove is formed on the inner wall of the sleeve opposite the top block, and an arc-shaped protrusion is fixedly connected in the groove. The center of the protrusion protrudes towards the top block, and the maximum thickness of the center of the protrusion matches the depth of the groove.

[0008] Furthermore, the support assembly includes a support ring, which is rotatably sleeved around the periphery of the support plate. Multiple support rods are evenly hinged to the outer side of the support ring. A connecting sleeve is slidably sleeved at the end of the support rod away from the support ring. The end of the connecting sleeve away from the support rod is hinged to the inner wall of the second housing near the first housing. A second shock-absorbing spring is fixedly connected between the end of the support rod located inside the connecting sleeve and the inner wall of the connecting sleeve near the cylinder.

[0009] Furthermore, a filter cover is detachably mounted on the end of the second housing away from the first housing. The filter cover is conical, and its diameter gradually decreases in the direction away from the second housing.

[0010] Furthermore, the filter cover has multiple strip-shaped through holes through its conical surface, and these multiple strip-shaped through holes are arranged in a ring. A top bar matching the length of the strip-shaped through hole is slidably inserted into the strip-shaped through hole. An L-shaped rod is fixedly connected to one end of the top bar inside the filter cover. The same rotating ring is fixedly connected to one end of the multiple L-shaped rods near the sleeve. The rotating ring is rotatably sleeved on the end of the sleeve near the filter cover.

[0011] Furthermore, the plurality of top blocks are evenly distributed on the surface of the fixed shaft, and the length of the top block is greater than the depth of the groove.

[0012] Furthermore, the side of the support plate near the sleeve is tapered, and the inner edge of the sleeve near one end is also tapered, with the tapered surface of the sleeve matching the tapered surface of the support plate.

[0013] Furthermore, the top bar can always be inserted into the strip hole, and the width of the top bar is greater than the maximum extension of the first shock-absorbing spring.

[0014] Furthermore, the side of the impeller away from the sleeve is close to the inner wall of the cylinder near the first housing, and the diameter of the impeller is smaller than the diameter of the auger blades.

[0015] The technical effects and advantages of this invention are as follows:

[0016] 1. The present invention incorporates auger blades. During the operation of the impeller, the auger blades rotate together with the fixed shaft. As the auger blades rotate, they accelerate the water flow towards the impeller, thereby greatly increasing the pressure of the water flow towards the impeller. This makes the pressure at the inlet of the main impeller higher than the vaporization pressure of the liquid. Furthermore, as the water flow velocity changes, the auger blades can also work with the first damping spring to squeeze the water flow towards the impeller, thereby greatly reducing the possibility of impeller cavitation.

[0017] 2. By providing a support assembly, during the rotation of the output shaft and the fixed shaft, when they sway due to the influence of water flow or motor vibration, multiple second damping springs can generate a supporting force on the support plate through the support rod. Thus, the support plate restricts the fixed shaft, ensuring that the fixed shaft and the output shaft can maintain a relatively stable rotation state. The second damping springs can also work with the first damping spring and the buffer spring to absorb the vibration generated by the fixed shaft and the output shaft, thereby reducing the impact of vibration on the fixed shaft and the output shaft and ensuring that the invention can maintain a relatively stable operating state.

[0018] 3. By incorporating a top block and a buffer spring, the protrusions can compress the corresponding top block and buffer spring under the action of the sleeve as it moves along the fixed axis. As the buffer springs are further compressed, the thrust generated by all the buffer springs on all the protrusions inside the sleeve through the corresponding top blocks can also make the sleeve better coaxial with the fixed axis, thereby enabling the inner wall of the sleeve to maintain uniform friction with the surface of the fixed axis and avoiding increased wear between the sleeve and the fixed axis due to the deviation of their axes. At the same time, as the buffer springs are compressed, they can convert the vibration between the two into the elastic potential energy of the buffer springs, thereby reducing the impact of vibration on the sleeve and the fixed axis.

[0019] 4. By providing a filter cover, the present invention can protect the water inlet of the second housing during use. Thus, when water flows through the interior of the second and first housings, the filter cover can filter and intercept impurities in the water, preventing impurities from colliding with the auger blades or impeller under the influence of the water flow, thereby ensuring that the auger blades and impeller are not damaged.

[0020] 5. By providing a top bar, during the use of the filter cover, as the water flow changes, the auger blades can drive the rotating ring to move back and forth along the direction of the limiting groove via the sleeve. As the rotating ring moves, it can drive the top bar to move back and forth via the L-shaped rod, thereby intermittently pushing away the debris accumulated on the outside of the filter cover. This allows the debris to be separated from the filter cover along the conical surface of the filter cover under the action of the water flow, thus preventing the debris from clogging the filter cover. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the second housing and filter cover in this invention;

[0024] Figure 4 This is a three-dimensional schematic diagram of the sleeve, auger blades, and limiting block in this invention;

[0025] Figure 5 This is a three-dimensional schematic diagram of the fixed shaft, top block, and ball bearings in this invention;

[0026] Figure 6 This is a three-dimensional sectional view of the structure including the output shaft, impeller, support assembly, and sleeve in this invention;

[0027] Figure 7 In this invention Figure 6 Enlarged view of part A;

[0028] Figure 8 This is a three-dimensional schematic diagram of some of the supporting components in this invention.

[0029] In the diagram: 1. First housing; 2. Second housing; 3. Motor; 4. Fixing block; 5. Output shaft; 6. Impeller; 7. Fixing shaft; 8. Sleeve; 9. Buffer assembly; 91. Top block; 92. Ball bearing; 93. Buffer spring; 94. Protrusion; 10. Screw blade; 11. Limiting block; 12. Limiting groove; 13. Baffle; 14. Screw; 15. Support plate; 16. First damping spring; 17. Support assembly; 171. Support ring; 172. Support rod; 173. Connecting sleeve; 174. Second damping spring; 18. Mounting bracket; 19. Filter cover; 20. Top bar; 21. L-shaped rod; 22. Rotary ring. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0031] This invention provides, for example Figures 1 to 8The illustrated bidirectional submersible cross-flow pump with stable internal flow of the guide vane body includes a cylindrical first housing 1. A second housing 2 is connected to the front end of the first housing 1. The second housing 2 consists of two conical sections, with the smaller ends of the two sections connected together. A motor 3 is mounted at the axis of the first housing 1. Multiple fixing blocks 4 are fixedly connected between the outer side of the motor 3 and the inner wall of the first housing 1. An output shaft 5 is drivenly connected to the end of the motor 3 near the second housing 2. An impeller 6 is mounted on the output shaft 5. A fixed shaft 7 is drivenly connected to the free end of the output shaft 5, and the edge of the fixed shaft 7 near the impeller 6 protrudes outwards. A sleeve 8 is fitted onto the fixed shaft 7. A buffer assembly 9 is provided inside the sleeve 8. Screwdriver blades 10 are fixedly connected to the outer wall of the sleeve 8. Two limiting blocks 11 are symmetrically fixedly connected to the inner wall of the sleeve 8. The surface of the fixed shaft 7 is along the fixed shaft 7. Two limiting grooves 12 are symmetrically opened along the length direction of the sleeve 8, and two limiting blocks 11 are slidably installed in the two limiting grooves 12 respectively. A baffle 13 is provided at the free end of the sleeve 8. The baffle 13 is slidably sleeved on the fixed shaft 7. The baffle 13 is connected to the fixed shaft 7 by screws 14. A support plate 15 is provided at the end of the sleeve 8 away from the baffle 13. A first damping spring 16 is connected at the end of the support plate 15 away from the fixed shaft 7. The first damping spring 16 is sleeved on the fixed shaft 7. The end of the first damping spring 16 away from the support plate 15 is fixedly connected to the protruding part at the end of the fixed shaft 7. Multiple support components 17 are provided between the outer side of the support plate 15 and the inner wall of the second housing 2. Two sets of mounting brackets 18 are installed at the bottom of the first housing 1. The side of the impeller 6 away from the sleeve 8 is close to the inner wall of the cylinder near the first housing 1, and the diameter of the impeller 6 is smaller than the diameter of the auger blade 10.

[0032] With the auger blades 10 installed, as the motor 3 drives the impeller 6 to rotate through the output shaft 5, the auger blades 10 can also rotate together under the drive of the fixed shaft 7. As the auger blades 10 rotate, they can generate an axial thrust on the water flow towards the impeller 6, thereby accelerating the water flow towards the impeller 6. As the water flow speed increases, the pressure of the water flowing towards the impeller 6 also increases significantly, making the pressure at the inlet of the main impeller 6 higher than the vaporization pressure of the liquid, thus greatly reducing the possibility of cavitation in the impeller 6.

[0033] Furthermore, during the operation of this invention, by providing a first damping spring 16, when the auger blade 10 is impacted by water flow, the auger blade 10 can move towards the output shaft 5 under the push of the water flow. During this process, as the auger blade 10 moves, the sleeve 8 can drive the limiting block 11 to move along the limiting groove 12 under the action of the auger blade 10. As the sleeve 8 moves, the sleeve 8 can squeeze the support plate 15, thereby causing the first damping spring 16 to be gradually compressed. As the first damping spring 16 is compressed, the impact force of the water flow on the auger blade 10 can be converted into the elastic potential energy of the first damping spring 16, thereby reducing the impact of the water flow on the auger blade 10.

[0034] Furthermore, during the movement of the auger blade 10, due to the different water flow velocities, the impact force on the auger blade 10 varies when water flows of different velocities impact it. This causes the first damping spring 16 to be compressed to different degrees, and the auger blade 10 moves back and forth along the fixed axis 7. As the auger blade 10 moves back and forth, it can act like a piston to squeeze the water flow towards the impeller 6, thereby further increasing the pressure when the water reaches the impeller 6 and thus better preventing cavitation in the impeller 6.

[0035] In addition, by providing a support component 17 around the support plate 15, when the output shaft 5 and the fixed shaft 7 sway under the influence of water flow or motor 3 vibration during rotation, the support component 17 can effectively restrict the fixed shaft 7, thereby reducing the impact of water flow or motor 3 vibration and ensuring that the present invention can maintain a stable operating state.

[0036] like Figures 5 to 7 As shown, the buffer assembly 9 includes several cylindrical top blocks 91. The top blocks 91 are vertically slidably inserted into the surface of the fixed shaft 7. A ball bearing 92 is rotatably mounted on one end of the top block 91 outside the fixed shaft 7. A buffer spring 93 is fixedly connected between the end of the top block 91 inside the fixed shaft 7 and the interior of the fixed shaft 7. A groove is formed on the inner wall of the sleeve 8 at the position directly opposite the top blocks 91. An arc-shaped protrusion 94 is fixedly connected in the groove. The middle part of the protrusion 94 protrudes towards the top blocks 91, and the maximum thickness of the middle part of the protrusion 94 matches the depth of the groove. The multiple top blocks 91 are evenly distributed on the surface of the fixed shaft 7, and the length of the top block 91 is greater than the depth of the groove.

[0037] By incorporating a top block 91 and a buffer spring 93, after the sleeve 8 and auger blade 10 are installed onto the fixed shaft 7, the baffle 13 is installed onto the end of the fixed shaft 7 via screws 14, thereby restricting the sleeve 8. In the initial state, the protrusion 94 can be located on the side of the top block 91 away from the output shaft 5, and the buffer spring 93 can be kept in a semi-compressed state under the pressure of the protrusion 94 on the top block 91. As the motor 3 starts, the impeller 6 can continuously transport water into the second housing 2 under the drive of the output shaft 5 of the motor 3. During this process, the thrust of the water flow on the auger blade 10 causes the sleeve 8 to move along the fixed shaft 7 towards the output shaft 5. As the sleeve 8 moves, the protrusion 94 can... Driven by the sleeve 8, the ball 92 on the corresponding top block 91 is squeezed, which causes the top block 91 to further compress the buffer spring 93 under pressure. As the buffer spring 93 is further compressed, the thrust of the buffer spring 93 on the arc surface of the protrusion 94 through the top block 91 gradually increases, thereby slowing down the movement speed of the sleeve 8 along the fixed shaft 7. In addition, the thrust generated by all the buffer springs 93 on all the protrusions 94 inside the sleeve 8 through the corresponding top block 91 can also make the sleeve 8 better coaxial with the fixed shaft 7. Thus, when the sleeve 8 moves along the fixed shaft 7, the inner wall of the sleeve 8 can maintain uniform friction with the surface of the fixed shaft 7, avoiding increased wear between the sleeve 8 and the fixed shaft 7 due to the deviation of their axes.

[0038] Furthermore, during the movement of the sleeve 8 along the fixed shaft 7, due to the gap between them, the sleeve 8 and the fixed shaft 7 will wobble during long-term use. At this time, due to the presence of the buffer spring 93, the vibration generated during the relative movement of the two can be transmitted to the corresponding buffer spring 93 through the top block 91, thereby converting the vibration between the two into the elastic potential energy of the buffer spring 93, and thus reducing the impact of the vibration on the sleeve 8 and the fixed shaft 7.

[0039] like Figures 3 to 8 As shown, the support assembly 17 includes a support ring 171, which is rotatably sleeved around the support plate 15. A plurality of support rods 172 are evenly hinged to the outer side of the support ring 171. A connecting sleeve 173 is slidably sleeved at the end of the support rod 172 away from the support ring 171. The end of the connecting sleeve 173 away from the support rod 172 is hinged to the inner wall of the second housing 2 near the first housing 1. A second shock-absorbing spring 174 is fixedly connected between the end of the support rod 172 located inside the connecting sleeve 173 and the inner wall of the connecting sleeve 173 near the cylinder.

[0040] By incorporating the second damping spring 174, the support plate 15 can rotate along with the fixed shaft 7 during its rotation. The support ring 171 remains stationary under the constraint of multiple support rods 172 and connecting sleeve 173. When the output shaft 5 of the motor 3 and the fixed shaft 7 sway due to the vibration generated by the water flow or the motor 3, the multiple second damping springs 174 can generate a supporting force on the support plate 15 through the support rods 172. This ensures that the fixed shaft 7 and the output shaft 5 maintain a relatively stable rotational state through the constraint of the support plate 15. The second damping springs 174 can also work with the first damping spring 16 and the buffer spring 93 to absorb the vibration generated by the fixed shaft 7 and the output shaft 5, thereby reducing the impact of vibration on the fixed shaft 7 and the output shaft 5 and ensuring that the invention can maintain a relatively stable operating state.

[0041] like Figures 1 to 3 As shown, a filter cover 19 is detachably installed at the end of the second housing 2 away from the first housing 1. The filter cover 19 is conical, and its diameter gradually decreases in the direction away from the second housing 2. Multiple strip-shaped through holes are opened through the conical surface of the filter cover 19, and the multiple strip-shaped through holes are distributed in a ring. A top bar 20 matching its length is slidably inserted into the strip-shaped through holes. An L-shaped rod 21 is fixedly connected to one end of the top bar 20 inside the filter cover 19. The same rotating ring 22 is fixedly connected to the end of the multiple L-shaped rods 21 near the sleeve 8. The rotating ring 22 is rotatably sleeved on the end of the sleeve 8 near the filter cover 19. The top bar 20 can always be inserted into the strip-shaped hole, and the width of the top bar 20 is greater than the maximum extension of the first shock-absorbing spring 16.

[0042] By providing a filter cover 19, during the use of this invention, the filter cover 19 can protect the water inlet end of the second housing 2. Thus, when water flows through the interior of the second housing 2 and the first housing 1, the filter cover 19 can filter and intercept impurities in the water, preventing impurities from colliding with the auger blades 10 or impeller 6 under the influence of the water flow, thereby ensuring that the auger blades 10 and impeller 6 are not damaged.

[0043] Furthermore, during the use of the filter cover 19, when there are many impurities in the water and they accumulate on the outside of the filter, the top bar 20 is provided. During the rotation of the fixed shaft 7, the rotating ring 22 can rotate relative to the fixed shaft 7 under the restriction of the top bar 20 by the filter cover 19. As the water flow changes, the thrust of the water flow through the auger blades 10 on the sleeve 8 also changes. As the auger blades 10 rotate, they can also drive the rotating ring 22 to move back and forth along the direction of the limiting groove 12 through the sleeve 8. As the rotating ring 22 moves, it can drive the top bar 20 to move back and forth through the L-shaped rod 21. With the back and forth movement of the top bar 20, it can intermittently push the impurities accumulated on the outside of the filter cover 19, so that the impurities can be separated from the filter cover 19 along the conical surface of the filter cover 19 under the action of the water flow, thereby preventing the impurities from clogging the filter cover 19.

[0044] like Figure 6 As shown, the side of the support plate 15 near the sleeve 8 is designed with a conical surface, and the inner edge of the sleeve 8 near one end is also designed with a conical surface, and the conical surface of the sleeve 8 matches the conical surface of the support plate 15.

[0045] By designing both the sleeve 8 and the support plate 15 as conical surfaces on opposite sides, when the sleeve 8 is pressed together with the support plate 15 under the thrust of the water flow on the auger blade 10, the sleeve 8 can better maintain coaxiality with the fixed shaft 7 under the constraint of the conical surface of the support plate 15.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body, comprising a cylindrical first housing (1), characterized in that: The front end of the first housing (1) is connected to the second housing (2). The second housing (2) is composed of two conical cylinders, and the smaller ends of the two cylinders are connected together. A motor (3) is provided at the axis of the first housing (1). Multiple fixing blocks (4) are fixedly connected between the outer side of the motor (3) and the inner wall of the first housing (1). An output shaft (5) is driven to the end of the motor (3) near the second housing (2). An impeller (6) is installed on the output shaft (5). A fixed shaft (7) is driven to the free end of the output shaft (5). The edge of the fixed shaft (7) near the impeller (6) protrudes outward. A sleeve (8) is sleeved on the fixed shaft (7). A buffer assembly (9) is provided inside the sleeve (8). A screw conveyor blade (10) is fixedly connected to the outer wall of the sleeve (8). Two limiting blocks (11) are symmetrically fixedly connected to the inner wall of the sleeve (8). The surface of the fixed shaft (7) Two limiting grooves (12) are symmetrically opened along the length direction of the fixed shaft (7), and two limiting blocks (11) are slidably installed in the two limiting grooves (12). A baffle (13) is provided at the free end of the sleeve (8). The baffle (13) is slidably sleeved on the fixed shaft (7). The baffle (13) is connected to the fixed shaft (7) by screws (14). A support plate (15) is provided at the end of the sleeve (8) away from the baffle (13). A first damping spring (16) is connected at the end of the support plate (15) away from the fixed shaft (7). The first damping spring (16) is sleeved on the fixed shaft (7). The end of the first damping spring (16) away from the support plate (15) is fixedly connected to the protruding part at the end of the fixed shaft (7). Multiple support components (17) are provided between the outer side of the support plate (15) and the inner wall of the second housing (2). Two sets of mounting brackets (18) are installed at the bottom of the first housing (1). The buffer assembly (9) includes several cylindrical top blocks (91). The top blocks (91) are vertically slidably inserted into the surface of the fixed shaft (7). A ball bearing (92) is rotatably installed at one end of the top block (91) outside the fixed shaft (7). A buffer spring (93) is fixedly connected between the end of the top block (91) inside the fixed shaft (7) and the interior of the fixed shaft (7). A groove is provided on the inner wall of the sleeve (8) at the position directly opposite the top block (91). An arc-shaped protrusion (94) is fixedly connected in the groove. The middle part of the protrusion (94) protrudes towards the top block (91), and the maximum thickness of the middle part of the protrusion (94) matches the depth of the groove. The support assembly (17) includes a support ring (171), which is rotatably sleeved around the support plate (15). Multiple support rods (172) are evenly hinged to the outer side of the support ring (171). A connecting sleeve (173) is slidably sleeved at the end of the support rod (172) away from the support ring (171). The end of the connecting sleeve (173) away from the support rod (172) is hinged to the inner wall of the second housing (2) near the first housing (1). A second shock-absorbing spring (174) is fixedly connected between the end of the support rod (172) inside the connecting sleeve (173) and the inner wall of the end of the connecting sleeve (173) near the cylinder.

2. The bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 1, characterized in that: The second housing (2) is detachably fitted with a filter cover (19) at the end away from the first housing (1). The filter cover (19) is conical and its diameter gradually decreases in the direction away from the second housing (2).

3. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 2, characterized in that: The filter cover (19) has multiple strip-shaped through holes through its conical surface, and the multiple strip-shaped through holes are arranged in a ring. A top bar (20) matching its length is slidably inserted into the strip-shaped through hole. One end of the top bar (20) located inside the filter cover (19) is fixedly connected to an L-shaped rod (21). The ends of the multiple L-shaped rods (21) near the sleeve (8) are fixedly connected to the same rotating ring (22). The rotating ring (22) is rotatably sleeved on the end of the sleeve (8) near the filter cover (19).

4. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 1, characterized in that: Multiple top blocks (91) are evenly distributed on the surface of the fixed shaft (7), and the length of the top block (91) is greater than the depth of the groove.

5. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 3, characterized in that: The support plate (15) has a conical surface design on the side near the sleeve (8), and the inner edge of the sleeve (8) near the end of the sleeve (8) is also a conical surface design, and the conical surface of the sleeve (8) matches the conical surface of the support plate (15).

6. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 3, characterized in that: The top bar (20) can always be inserted into the strip hole, and the width of the top bar (20) is greater than the maximum extension of the first shock absorber spring (16).

7. A bidirectional submersible axial flow pump with stable internal flow of the guide vane body according to claim 5, characterized in that: The side of the impeller (6) away from the sleeve (8) is close to the inner wall of the cylinder near the first housing (1), and the diameter of the impeller (6) is smaller than the diameter of the auger blade (10).

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