A wear-resistant single screw pump convenient to maintain and replace

Abstract

The application belongs to the field of single screw pumps, and particularly relates to a wear-resistant single screw pump convenient to maintain and replace, which comprises a feeding cavity, a stator cover is arranged at one end of the feeding cavity, a stator is fixedly connected in the stator cover, a rotor is arranged in meshing mode in the stator, a discharge flange is arranged at the end of the stator cover away from the feeding cavity, a plurality of fixing rods are fixedly connected between the discharge flange and the feeding cavity, a first support is fixedly connected at the end of the feeding cavity away from the stator cover, a driving part is arranged at one end of the first support, a disconnecting part is drivingly connected to the driving part, the disconnecting part is drivingly connected to the end of the rotor, a second support fixedly connected with the fixing rods is fixedly connected to the end of the feeding cavity close to the stator cover, and the feeding cavity and the stator cover are threadedly connected through a connecting sleeve ring. Through the arrangement of the connecting sleeve ring, the stator and the rotor can be quickly disassembled and assembled, and the maintenance and replacement can still be conveniently carried out under the condition of limited space.

Description

Technical Field

[0001] This invention belongs to the field of single screw pumps, specifically a wear-resistant single screw pump that is easy to maintain and replace. Background Technology

[0002] Screw pumps are positive displacement rotary pumps that rely on the volume change of the sealed cavity formed by the screw and bushing to draw in and discharge liquids. Screw pumps are characterized by stable flow, low pressure pulsation, self-priming capability, low noise, high efficiency, long service life, and reliable operation. Their outstanding advantages include not forming eddies when conveying media and being insensitive to the viscosity of the media, allowing them to convey high-viscosity media. Therefore, their applications are becoming increasingly widespread. Screw pumps have both single-suction and double-suction structures, but single-screw pumps are only available in single-suction configurations. Due to their ability to convey mixed solid particles, single-screw pumps are often used in harsh environments such as sewage transportation. However, the stator and rotor experience significant wear or corrosion, requiring regular maintenance and replacement.

[0003] However, the existing single screw pump structure cannot be quickly and easily disassembled and maintained. Usually, the feed chamber and discharge flange must be removed first before the stator and rotor that need to be replaced and maintained can be removed. Moreover, depending on the usage scenario, such as in a small space like a ship's cabin, there is rarely open space around the installation location of the single screw pump, making disassembly and assembly work even more difficult.

[0004] For example, Chinese patent CN208203551U discloses a single screw pump that is easy to disassemble and assemble, including a discharge housing, a screw shaft, a bearing housing, and a base. A working motor is mounted on the base, a coupling is mounted next to the working motor, a sealing cover is mounted next to the coupling, a bearing housing is mounted next to the sealing cover, a bearing is mounted inside the bearing housing, a pressure cap is mounted next to the bearing, a support base is mounted next to the pressure cap, a drive shaft is mounted between the coupling and the universal joint, a feed housing is mounted next to the bearing housing, a coupling is mounted inside the feed housing, a universal joint is mounted next to the coupling, a screw shaft is mounted next to the universal joint, and a stator is mounted on the outside of the screw shaft. This patent uses easily disassembled parts for connection to reduce the time required to replace the screw shaft and improve the convenience of maintenance.

[0005] However, the aforementioned patents still have the following drawbacks:

[0006] 1. According to the description of the above patent, the above patent is only to reduce the number of parts required for disassembly and assembly, and to use a quick-release structure as a necessary connector. This connection is not stable enough, and under the condition of limited maintenance space, it is not convenient and quick to disassemble and maintain.

[0007] 2. The above-mentioned patent provides a wear-resistant treatment for the stator and rotor, but the stator and rotor are still prone to wear, which indirectly increases the number of maintenance times and time, thereby further increasing the workload and difficulty of maintenance work.

[0008] 3. If a jam occurs during the operation of a single screw pump, the aforementioned patent cannot achieve automatic disconnection, which may easily lead to overload and damage to the internal parts of the single screw pump. Summary of the Invention

[0009] To overcome the shortcomings of existing technologies, this invention addresses the technical problem of effectively reducing rotor wear on the stator by applying a wear-resistant coating to the inner wall of the stator. The rotor, made of aluminized carbon steel, ensures structural strength while allowing a dense alumina film to form on its surface, effectively preventing corrosion from conveyed materials and reducing stator wear. The reverse threads at both ends of the connecting collar allow for easy installation or removal of the stator housing by screwing on the connecting collar, facilitating the replacement of worn stator and rotor without disassembling other fixed connections on the single screw pump. This makes maintenance convenient and efficient, especially in environments with limited space. In cases where large particles jam the rotor, the ball-head limiting pin overcomes the elastic pressure of the spring, causing the ball end of the limiting pin to disengage from the limiting groove and slide into the spiral groove. This ultimately allows the connecting sleeve to completely disengage from the connecting head, achieving automatic disconnection. This prevents damage to internal parts of the single screw pump caused by continuous power application while the rotor is jammed, thus improving service life and reducing the risk of damage. The depth of the threaded pin in the threaded seat can be adjusted by screwing in a screwdriver or other tools, and the locking nut can be tightened to lock the position of the threaded pin. This adjusts the elastic pressure applied by the spring to the ball-head limiting pin, thereby adjusting the torque value required for the connecting sleeve to disengage from the connecting head. This makes the pump more flexible and applicable to more scenarios.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a wear-resistant single screw pump that is easy to maintain and replace, comprising:

[0011] The feeding chamber has a stator cover at one end, a stator is fixedly connected inside the stator cover, a rotor is meshed inside the stator, and a discharge flange is provided at the end of the stator cover away from the feeding chamber. Multiple fixing rods are evenly distributed and fixedly connected between the discharge flange and the feeding chamber.

[0012] A feed flange is provided above the feed cavity and communicates with the inside of the feed cavity. A pressure relief port is provided at the bottom of the feed cavity below the connecting sleeve.

[0013] The feeding chamber is fixedly connected to a first bracket at one end away from the stator cover. A driving component is provided at one end of the first bracket away from the feeding chamber. A disconnection component is driven to the power output end of the driving component. The disconnection component is driven to the rotor end.

[0014] Furthermore, a second bracket is fixedly connected to the end of the feeding cavity near the stator cover, which is also fixedly connected to the fixing rod. The feeding cavity and the stator cover are connected by a connecting collar threaded together. The threads at both ends of the connecting collar have the same pitch but opposite directions. A disassembly handle can be inserted into the outside of the connecting collar. The distance between adjacent fixing rods is greater than the diameter of the stator cover and the connecting collar.

[0015] Furthermore, a locking pin is fixedly provided on the outer side of the stator cover away from the feed cavity, and the locking pin can be inserted and fixed with the discharge flange.

[0016] Furthermore, the disconnection component includes a connecting head, which is fixedly connected to one end of the rotor located in the feeding chamber. A connecting sleeve is sleeved on the outside of the connecting head. Multiple limiting grooves are evenly distributed on the surface of the connecting head. Multiple spiral grooves communicating with the limiting grooves are formed on the outer surface of the connecting head. A ball-head limiting pin is slidably connected inside the connecting sleeve at the corresponding position of each limiting groove. The end of each ball-head limiting pin can be inserted into the limiting groove and can slide within the spiral groove.

[0017] Furthermore, a threaded seat is fixedly connected to the outer side of the connecting sleeve at the corresponding position of each ball head limiting pin. Each ball head limiting pin is slidably connected to the corresponding threaded seat. A threaded pin is threadedly connected to the threaded seat. A spring is provided between each threaded pin and the corresponding ball head limiting pin. A locking nut is threadedly connected to one end of each threaded pin that extends out of the threaded seat.

[0018] Furthermore, a disengagement hole is provided on the connecting sleeve and on the end of the rotor near the connecting sleeve, and a maintenance end cap is fixedly connected above the feeding chamber at the corresponding position on the connecting sleeve.

[0019] Furthermore, a drive shaft is rotatably connected to the end of the feed chamber away from the stator cover. Two universal joints are fixedly connected to the two ends of the drive shaft and the connecting sleeve that are close to each other. A telescopic rod is fixedly connected between the movable ends of the two universal joints. The telescopic rod can freely extend and retract.

[0020] Furthermore, a sealing end cap is threadedly connected to the end of the feed chamber away from the stator cover. The sealing end cap is rotatably connected to the drive shaft. A sealing packing material surrounding the outside of the drive shaft is provided between the sealing end cap and the drive shaft. An annular sealing packing material is provided between the discharge flange and the stator cover.

[0021] Furthermore, the driving component includes a gearbox, with the gearbox fixedly connected to one end of the first bracket away from the feeding chamber, and a motor fixedly connected to one end of the gearbox away from the first bracket. The power output end of the motor is connected to the gearbox for transmission, and the power output end of the gearbox is fixedly connected to one end of the transmission shaft extending out of the feeding chamber.

[0022] Furthermore, the inner wall of the stator is coated with a wear-resistant coating on the surface that comes into contact with the rotor, and the rotor is made of aluminized carbon steel.

[0023] In summary, compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] (1) By setting a wear-resistant coating on the inner wall of the stator, the wear of the rotor on the stator is effectively reduced. The rotor is made of aluminized carbon steel, which enables the rotor to form a dense aluminum oxide film on the rotor surface while ensuring its structural strength requirements. This effectively prevents the conveyed material from corroding the rotor and reduces the wear on the stator.

[0025] (2) By setting the reverse threads at both ends of the connecting collar, the stator cover can be installed or removed by screwing the connecting collar, so as to conveniently replace the worn stator and rotor without disassembling other fixed connection positions of the single screw pump, making maintenance work convenient and efficient, and more convenient to perform maintenance work in environments with limited maintenance space.

[0026] (3) In the event that a large particle jams the rotor, the ball head limit pin overcomes the elastic pressure of the spring, causing the ball head end of the ball head limit pin to disengage from the limit groove and slide into the spiral groove, ultimately causing the connecting sleeve to completely disengage from the connecting head, achieving automatic disconnection, avoiding the rotor jamming and continuous application of power, which would damage the internal parts of the single screw pump, thereby improving service life and reducing the risk of damage.

[0027] (4) The depth of the threaded pin in the threaded seat can be adjusted by screwing in a screwdriver or other tools, and the position of the threaded pin can be locked by screwing in the lock nut. Then, the elastic pressure applied by the spring to the ball head limit pin can be adjusted to adjust the torque value required for the connection sleeve to disengage from the connection head, making it more flexible and applicable to more scenarios. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the present patent.

[0029] Figure 2 This is a front view of the patent.

[0030] Figure 3 for Figure 2 A three-dimensional sectional view at point AA.

[0031] Figure 4 for Figure 3 A magnified view of a section at point B.

[0032] Figure 5 for Figure 3 A magnified view of a section at point C.

[0033] Figure 6 for Figure 3 A magnified view of a section at point D.

[0034] Figure 7 for Figure 3 A magnified view of a section at point E in the middle.

[0035] Figure 8 This is a structural diagram of the connecting sleeve and the connecting head.

[0036] Figure 9 for Figure 8 A magnified view of a section at point F.

[0037] Explanation of reference numerals in the attached drawings: 10. Feed chamber; 11. Stator cover; 12. Stator; 13. Rotor; 14. Discharge flange; 15. First bracket; 16. Gearbox; 17. Motor; 18. Connecting collar; 19. Disassembly handle; 20. Second bracket; 21. Fixing rod; 22. Feed flange; 23. Inspection end cover; 24. Pressure relief port; 25. Connecting sleeve; 26. Connecting head; 27. Limiting groove; 28. Spiral groove; 29. ​​Threaded seat; 30. Ball head limiting pin; 31. Spring; 32. Threaded pin; 33. Locking nut; 34. Disengagement socket; 35. Telescopic rod; 36. Universal joint; 37. Drive shaft; 38. Sealing end cover; 39. Sealing packing; 40. Locking pin. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0039] like Figure 1-9As shown, a wear-resistant single screw pump that is easy to maintain and replace includes a feed chamber 10, a through feed flange 22 at the top of the feed chamber 10, a pressure relief port 24 at the bottom of the feed chamber 10, a sealing plug inside the pressure relief port 24, a connecting collar 18 threadedly connected to one end of the feed chamber 10, and a stator cover 11 threadedly connected to the other end of the connecting collar 18 away from the feed chamber 10. The threads at both ends of the connecting collar 18 have the same pitch but opposite directions. A sleeve is fitted on the outside of the stator cover 11 at the end away from the feed chamber 10. The discharge flange 14 is fixedly connected to the feed chamber 10 by four fixed rods 21 arranged in a circumferential pattern. The distance between any two adjacent fixed rods 21 is greater than the diameter of the connecting collar 18. Multiple disassembly handles 19 can be inserted into the outer side of the connecting collar 18. The stator 12 is fixedly connected inside the stator cover 11, and the rotor 13 is meshed inside the stator 12. A locking pin 40 is fixedly provided on the outer side of the stator cover 11 away from the feed chamber 10. The locking pin 40 can be inserted into and fixed to the discharge flange 14.

[0040] By using the reverse threads at both ends of the connecting collar 18, the stator cover 11 can be installed or removed by screwing the connecting collar 18, making it easy to replace the worn stator 12 and rotor 13 without disassembling other fixed connection positions of the single screw pump. This makes maintenance work convenient and efficient, and will not damage the sealing state of other sealing surfaces.

[0041] By setting the locking pin 40, the rotational freedom of the stator cover 11 can be locked when it is inserted into the discharge flange 14, so that the feed chamber 10 will not rotate arbitrarily, thus making it convenient for the operator to apply force to tighten the connecting collar 18.

[0042] like Figure 1-9 As shown, a connecting head 26 is fixedly connected to the end of the rotor 13 located inside the feed chamber 10. A connecting sleeve 25 is sleeved on the outside of the connecting head 26. Multiple limiting grooves 27 are evenly distributed on the surface of the connecting head 26. Multiple spiral grooves 28 communicating with the limiting grooves 27 are opened on the outer surface of the connecting head 26. A ball head limiting pin 30 is slidably connected to the connecting sleeve 25 at the corresponding position of each limiting groove 27. The end of each ball head limiting pin 30 can be inserted into the limiting groove 27. The end of each ball head limiting pin 30 can slide in the spiral groove 28. A threaded seat 29 is fixedly connected to the outside of the connecting sleeve 25 at the corresponding position of each ball head limiting pin 30. Each ball head limiting pin 30 is slidably connected to the corresponding threaded seat 29. A threaded pin 32 is threadedly connected to the threaded seat 29. A spring 31 is provided between each threaded pin 32 and the corresponding ball head limiting pin 30. A locking nut 33 is threadedly connected to one end of each threaded pin 32 that extends out of the threaded seat 29.

[0043] By setting the ball head limiting pin 30 to be inserted into the corresponding limiting groove 27 under the elastic pressure of the spring 31, the connecting sleeve 25 and the connecting head 26 are stably connected to transmit kinetic energy to drive the rotor 13 to rotate. However, if a large particle jams the rotor 13, the ball head limiting pin 30 overcomes the elastic pressure of the spring 31, causing the ball head end of the ball head limiting pin 30 to disengage from the limiting groove 27 and slide into the spiral groove 28. Finally, the connecting sleeve 25 and the connecting head 26 are completely disengaged, achieving automatic disconnection. This prevents the rotor 13 from jamming and continues to apply power, which could damage the internal parts of the single screw pump, thereby improving service life and reducing the risk of damage.

[0044] Furthermore, by adjusting the depth of the threaded pin 32 within the threaded seat 29, the elastic pressure applied by the spring 31 to the ball head limiting pin 30 can be adjusted. This allows for the adjustment of the torque value required to disengage the connecting sleeve 25 from the connecting head 26 according to the actual usage scenario, making the application more flexible and applicable to more scenarios.

[0045] like Figure 1-9 As shown, a disengagement hole 34 is provided on the connecting sleeve 25 and on the end of the rotor 13 near the connecting sleeve 25, and a maintenance end cover 23 is fixedly connected above the feed chamber 10 at the corresponding position on the connecting sleeve 25.

[0046] By setting up the inspection end cover 23, it is convenient for operators to inspect and maintain the internal components of the feed chamber 10. When it is necessary to replace the worn rotor 13, the operator can use tools such as screwdrivers to insert into the two disengagement holes 34 respectively and manually separate the connection between the connecting sleeve 25 and the connecting head 26, so as to realize the function of conveniently replacing the rotor 13, saving maintenance and replacement time and improving maintenance efficiency.

[0047] like Figure 1-9 As shown, a drive shaft 37 is rotatably connected to the end of the feed chamber 10 away from the stator cover 11. A gearbox 16 is fixedly connected to the end of the first bracket 15 away from the feed chamber 10. A motor 17 is fixedly connected to the end of the gearbox 16 away from the first bracket 15. The power output end of the motor 17 is connected to the gearbox 16. The power output end of the gearbox 16 is fixedly connected to the end of the drive shaft 37 extending out of the feed chamber 10. Two universal joints 36 are fixedly connected to the two ends of the drive shaft 37 and the connecting sleeve 25 that are close to each other. A telescopic rod 35 is fixedly connected between the movable ends of the two universal joints 36. The telescopic rod 35 can slide freely. A sealing end cap 38 is threadedly connected to the end of the feed chamber 10 away from the stator cover 11. The sealing end cap 38 is rotatably connected to the drive shaft 37. A sealing packing 39 is provided between the sealing end cap 38 and the drive shaft 37, surrounding the outside of the drive shaft 37. An annular sealing packing 39 is provided between the discharge flange 14 and the stator cover 11.

[0048] By setting the telescopic rod 35, the displacement space of the connecting sleeve 25 is reserved to allow the connecting sleeve 25 to disengage from the connecting head 26, so that the connecting sleeve 25 can be smoothly disconnected from the connecting head 26. By setting the sealing packing 39, the sealing performance of the single screw pump is effectively guaranteed, and leakage of the conveyed liquid material is avoided.

[0049] like Figure 1-9 As shown, the inner wall of the stator 12 is coated with a wear-resistant coating on the surface that comes into contact with the rotor 13, and the rotor 13 is made of aluminized carbon steel.

[0050] In this embodiment, initially, the operator installs the single screw pump in a designated position, with the feed flange 22 connected to the feed pipe and the discharge flange 14 connected to the discharge pipe. The second bracket 20 and the first bracket 15 are then stably fixed to the base or ground. During operation, the operator starts the motor 17 to drive the telescopic rod 35 to rotate. The telescopic rod 35 continuously performs a circular oscillation while rotating on its own axis. Since the connecting sleeve 25 and the connecting head 26 are stably connected, the power is transmitted through the connecting sleeve 25 to the connecting head 26, ultimately driving the rotor 13 to perform a spiral motion within the stator 12. This, in conjunction with the stator 12, forms a cavity that continuously moves towards the discharge flange 14, continuously squeezing and conveying the liquid material in the feed chamber 10 towards the discharge flange 14.

[0051] When conveying materials, the wear-resistant coating on the inner wall of the stator 12 effectively reduces the wear of the rotor 13 on the stator 12, thereby improving the service life of the single screw pump and reducing the number of maintenance times to save maintenance costs. At the same time, the rotor 13 is made of aluminized carbon steel that has undergone aluminizing processing, which allows the rotor 13 to form a dense alumina film on its surface while ensuring its structural strength requirements. This effectively prevents the conveyed materials from corroding the rotor 13, improving its service life. Furthermore, the rotor 13 will not develop rust spots due to corrosion, which would cause surface roughness and prevent the rough surface of the rotor 13 from accelerating the wear of the stator 12.

[0052] During normal operation, spring 31 provides elastic pressure, ensuring that the ball end of ball head limiting pin 30 is always inserted into the corresponding limiting groove 27. When the rotor 13 rotates to transport materials, if the diameter of solid particles mixed in the material exceeds the maximum diameter that a single screw pump can withstand, the rotor 13 may jam and become unable to rotate. At this time, motor 17 continues to output power. When the torque on the connecting sleeve 25 reaches a certain value, the elastic pressure of spring 31 is no longer sufficient to resist the squeezing force exerted by the limiting groove 27 on the ball head limiting pin 30 in the axial direction of the ball head limiting pin 30. This causes the end of the ball head limiting pin 30 to disengage from the limiting groove 27, thus disengaging the connecting sleeve 25 from the connecting head 26.

[0053] Meanwhile, the end of the ball head limiting pin 30 enters the spiral groove 28. Since the motor 17 always drives the connecting sleeve 25 to rotate, the ball head limiting pin 30 slides along the spiral groove 28 as the connecting sleeve 25 rotates. When the end of the ball head limiting pin 30 completely slips out of the spiral groove 28, the connecting head 26 is completely disengaged from the connecting sleeve 25, disconnecting the power connection. Thus, the power of the motor 17 will no longer be transmitted to the rotor 13, effectively protecting the rotor 13 from breakage or damage due to continuously increasing torque, and improving the service life of the single screw pump.

[0054] When performing maintenance work, if the connecting sleeve 25 and the connecting head 26 are in an automatic disconnection state, the operator can use the disassembly handle 19 to insert into the corresponding hole of the connecting collar 18 and screw the connecting collar 18. When the disassembly handle 19 is obstructed by the fixing rod 21, the operator can remove the disassembly handle 19 and change the connection position, thereby continuously screwing the connecting collar 18.

[0055] Because the two ends of the connecting collar 18 are screwed in opposite directions, during the tightening process, the connecting collar 18 separates from the feed chamber 10, and the stator cover 11 disengages from the discharge flange 14. Finally, the stator cover 11 is separated from the discharge flange 14 and the feed chamber 10. The maintenance personnel first lift the end of the stator cover 11 near the discharge flange 14 to tilt the stator cover 11, stator 12 and rotor 13. Then, the entire stator cover 11, stator 12 and rotor 13 are directly pulled out from the feed chamber 10. This makes it easy to troubleshoot or replace the worn stator 12 and rotor 13. Compared with the traditional single screw pump structure, the maintenance and replacement process has fewer steps and is simpler to operate. There is no need to disassemble additional parts. In scenarios where maintenance space is limited, it is easier to disassemble and maintain.

[0056] When the connecting sleeve 25 and the connecting head 26 are still connected during maintenance, the operator can remove the inspection end cover 23 and use tools such as screwdrivers to insert into the disengagement holes 34 on the rotor 13 and the connecting sleeve 25 respectively. When the opposite force is applied manually, the connecting sleeve 25 and the connecting head 26 will rotate and separate. Then, the stator cover 11 can be removed to take off the stator cover 11, stator 12 and rotor 13 as a whole.

[0057] In practical use, due to the different application scenarios and materials to be transported by the single screw pump, the operator can use tools such as screwdrivers to adjust the depth of the threaded pin 32 in the threaded seat 29 and tighten the locking nut 33 to lock the position of the threaded pin 32. This allows for adjustment of the elastic pressure applied by the spring 31 to the ball head limit pin 30, thereby adjusting the torque value required for the connection sleeve 25 and the connection head 26 to disengage. This makes the use more flexible and applicable to more scenarios.

[0058] The aforementioned gearbox 16, motor 17, etc. are mature existing technologies and will not be described in detail here.

[0059] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0060] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0061] The foregoing description illustrates and describes several preferred embodiments of this application. However, as previously stated, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A wear-resistant single screw pump that is easy to maintain and replace, characterized in that, The wear-resistant single screw pump that is easy to maintain and replace includes: A feeding chamber (10) is provided at one end of the feeding chamber (10), a stator cover (11) is fixedly connected inside the stator cover (11), a rotor (13) is meshed inside the stator (12), a discharge flange (14) is provided at the end of the stator cover (11) away from the feeding chamber (10), and a plurality of fixing rods (21) are evenly distributed and fixedly connected between the discharge flange (14) and the feeding chamber (10); Feed flange (22), a feed flange (22) communicating with the inside of the feed cavity (10) is provided above the feed cavity (10), and a pressure relief port (24) is provided at the bottom of the feed cavity (10) below the connecting sleeve (25); Wherein, the end of the feeding cavity (10) away from the stator cover (11) is fixedly connected to a first bracket (15), and the end of the first bracket (15) away from the feeding cavity (10) is provided with a driving component. The power output end of the driving component is connected to a disconnection component, and the disconnection component is connected to the end of the rotor (13). The feeding chamber (10) is fixedly connected to a second bracket (20) that is fixedly connected to a fixing rod (21) at one end near the stator cover (11). The feeding chamber (10) and the stator cover (11) are connected by a connecting collar (18) threadedly. The two ends of the connecting collar (18) have the same thread pitch but opposite thread direction. A disassembly handle (19) can be inserted into the outside of the connecting collar (18). The distance between adjacent fixing rods (21) is greater than the diameter of the stator cover (11) and the connecting collar (18). The disconnection component includes a connector (26), which is fixedly connected to one end of the rotor (13) located in the feed cavity (10). A connector sleeve (25) is sleeved on the outside of the connector (26). Multiple limiting grooves (27) are evenly distributed on the surface of the connector (26). Multiple spiral grooves (28) communicating with the limiting grooves (27) are opened on the outer surface of the connector (26). A ball-head limiting pin (30) is slidably connected in the connector sleeve (25) at the corresponding position of each limiting groove (27). The end of each ball-head limiting pin (30) can be inserted into the limiting groove (27) and the end of each ball-head limiting pin (30) can slide in the spiral groove (28). The feed chamber (10) is rotatably connected to a drive shaft (37) at one end away from the stator cover (11). Two universal joints (36) are fixedly connected to the two ends of the drive shaft (37) and the connecting sleeve (25) that are close to each other. A telescopic rod (35) is fixedly connected between the movable ends of the two universal joints (36). The telescopic rod (35) can freely extend and slide.

2. The wear-resistant single screw pump with convenient maintenance and replacement according to claim 1, characterized in that, A locking pin (40) is fixedly provided on the outer side of the stator cover (11) away from the feed cavity (10), and the locking pin (40) can be inserted and fixed to the discharge flange (14).

3. The wear-resistant single screw pump with convenient maintenance and replacement according to claim 1, characterized in that, A threaded seat (29) is fixedly connected to the outside of the connecting sleeve (25) at the corresponding position of each ball head limiting pin (30). Each ball head limiting pin (30) is slidably connected to the corresponding threaded seat (29). A threaded pin (32) is threadedly connected to the threaded seat (29). A spring (31) is provided between each threaded pin (32) and the corresponding ball head limiting pin (30). A locking nut (33) is threadedly connected to one end of each threaded pin (32) that extends out of the threaded seat (29).

4. The wear-resistant single screw pump with convenient maintenance and replacement according to claim 1, characterized in that, The connecting sleeve (25) and the rotor (13) near the connecting sleeve (25) are respectively provided with a disengagement insertion hole (34), and an inspection end cover (23) is fixedly connected above the feed chamber (10) at the corresponding position of the connecting sleeve (25).

5. A wear-resistant single screw pump that is easy to maintain and replace according to claim 1, characterized in that, The end of the feed chamber (10) away from the stator cover (11) is threaded with a sealing end cap (38). The sealing end cap (38) is rotatably connected to the drive shaft (37). A sealing packing (39) is provided between the sealing end cap (38) and the drive shaft (37) and surrounds the outside of the drive shaft (37). An annular sealing packing (39) is provided between the discharge flange (14) and the stator cover (11).

6. A wear-resistant single screw pump that is easy to maintain and replace according to claim 1, characterized in that, The driving component includes a gearbox (16). The gearbox (16) is fixedly connected to one end of the first bracket (15) away from the feed chamber (10). A motor (17) is fixedly connected to one end of the gearbox (16) away from the first bracket (15). The power output end of the motor (17) is connected to the gearbox (16) for transmission. The power output end of the gearbox (16) is fixedly connected to one end of the transmission shaft (37).

7. A wear-resistant single screw pump that is easy to maintain and replace according to claim 1, characterized in that, The inner wall of the stator (12) is coated with a wear-resistant coating on the surface that comes into contact with the rotor (13), and the rotor (13) is made of aluminized carbon steel.

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