Wear-resistant single-screw pump convenient to maintain and replace

Abstract

The invention 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 housing is arranged at one end of the feeding cavity, a stator is fixedly connected in the stator housing, a rotor is meshed in the stator, and a discharging flange is arranged at one end, far away from the feeding cavity, of the stator housing. A plurality of fixing rods are fixedly connected between the discharging flange and the feeding cavity, a first support is fixedly connected to the end, away from the stator housing, of the feeding cavity, a driving component is arranged at one end of the first support and is in transmission connection with a disconnection component, and the disconnection component is in transmission connection with the end of the rotor. The end, close to the stator cover shell, of the feeding cavity is fixedly connected with a second support fixedly connected with the fixing rod, the feeding cavity and the stator cover shell are in threaded connection through a connecting lantern ring, by arranging the connecting lantern ring, the stator and the rotor can be rapidly disassembled and assembled, and the stator and the rotor can still be conveniently maintained and replaced under the condition that the space is limited.

Description

Technical Field

[0001] The invention belongs to the field of single screw pumps, in particular to a wear-resistant single screw pump which is convenient for maintenance and replacement. Background Art

[0002] The screw pump is a positive displacement rotor pump that relies on the volume change of the sealed chamber formed by the screw and the bushing to suck in and discharge liquid. The characteristics of the screw pump are smooth flow, small pressure pulsation, self-priming ability, low noise, high efficiency, long life, and reliable operation. Its outstanding advantages are that it does not form vortices when conveying media, is insensitive to the viscosity of the medium, and can convey high-viscosity media, so its application is becoming more and more extensive. Screw pumps have two structures: single-suction and double-suction, but single screw pumps only have single-suction. Single screw pumps are often used in harsh scenarios such as sewage transportation because of their ability to convey mixed solid particulate materials. The stator and rotor are subject to high wear or corrosion and require regular maintenance and replacement.

[0003] However, the existing single-screw pump structure cannot be quickly and conveniently disassembled and maintained. Usually, the feed chamber and discharge flange need to be removed first before the stator and rotor that need to be replaced and maintained can be removed. In addition, depending on the usage scenario, for example, in a small space such as a cabin, it is difficult to have open space around the installation location of the single-screw pump, making disassembly and assembly even more difficult.

[0004] For example, a Chinese patent with publication number CN208203551 U discloses a single-screw pump that is easy to disassemble and assemble, including a discharge shell, a screw shaft, a bearing seat, and a base. A working motor is arranged on the base, a coupling is arranged next to the working motor, a sealing cover is arranged next to the coupling, a bearing seat is arranged next to the sealing cover, a bearing is arranged inside the bearing seat, a pressure cover is arranged next to the bearing, a support seat is arranged next to the pressure cover, a transmission shaft is arranged between the coupling and the universal joint, a feed shell is arranged next to the bearing seat, a connecting shaft is arranged inside the feed shell, a universal joint is arranged next to the connecting shaft, a screw shaft is arranged next to the universal joint, and a stator is arranged outside the screw shaft. This patent uses parts that are easy to disassemble as a connection method to reduce the time required for replacing the screw shaft and improve the convenience of maintenance.

[0005] However, the above patent still has the following disadvantages:

[0006] 1. According to the description of the above patent, the above patent only reduces the parts required for disassembly and assembly, and adopts a quick-disassembly structure as a necessary connecting part. This connection method is not stable enough, and cannot be disassembled and maintained conveniently and quickly under the condition of limited maintenance space.

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

[0008] 3. When the single screw pump is working, if it is stuck, the above patent cannot achieve automatic disconnection, which may easily cause overload and damage to the internal parts of the single screw pump. Summary of the invention

[0009] In order to overcome the deficiencies of the prior art, the present invention solves the technical problem of effectively reducing the wear of the rotor on the stator by arranging a wear-resistant coating on the inner wall of the stator, and the rotor is made of aluminized carbon steel, which can form a dense aluminum oxide film on the surface of the rotor while ensuring its structural strength requirements, thereby effectively avoiding corrosion of the rotor by the conveyed materials and reducing the wear on the stator. 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 that the worn stator and rotor can be easily replaced without disassembling other fixed connection positions of the single-screw pump, making maintenance work convenient and efficient, and in an environment with limited maintenance space, maintenance work can be more conveniently carried out. Once a problem occurs When the rotor is stuck by large-volume particles, the ball limit pin overcomes the elastic pressure of the spring to make the ball end of the ball limit pin disengage from the limiting groove, and make the end of the ball limit pin slide in the spiral groove, finally making the connecting sleeve and the connecting head completely disengage, realizing automatic disconnection, avoiding the rotor being stuck and continuously applying power to cause damage to the internal parts of the single-screw pump, thereby increasing the service life and reducing the risk of damage. The depth of the threaded pin in the threaded seat can be adjusted by screwing with a screwdriver or other tools, and the position of the threaded pin can be locked by screwing the locking nut, thereby adjusting the elastic pressure applied by the spring on the ball limit pin, thereby realizing the adjustment of the torque value required for the connection sleeve and the connecting head to be disconnected, making it more flexible to use and suitable for more scenarios.

[0010] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a wear-resistant single screw pump that is convenient for maintenance and replacement, comprising:

[0011] A feeding cavity, wherein a stator housing is disposed at one end of the feeding cavity, a stator is fixedly connected inside the stator housing, a rotor is meshedly disposed inside the stator, a discharge flange is disposed at one end of the stator housing away from the feeding cavity, and a plurality of fixing rods are evenly distributed and fixedly connected between the discharge flange and the feeding cavity;

[0012] A feed flange, wherein a feed flange communicating with the inside of the feed cavity is arranged above the feed cavity, and a pressure relief port is arranged at the bottom of the feed cavity below the connecting sleeve;

[0013] Among them, the end of the feed cavity away from the stator cover is fixedly connected with a first bracket, the end of the first bracket away from the feed cavity is provided with a driving component, the power output end of the driving component is transmission-connected with a disconnecting component, and the disconnecting component is transmission-connected to the rotor end.

[0014] Furthermore, one end of the feed cavity close to the stator cover is fixedly connected to a second bracket fixedly connected to a fixing rod, and the feed cavity and the stator cover are threadedly connected via a connecting ring, the thread pitches at both ends of the connecting ring are the same and the thread directions are opposite, and a disassembly handle can be inserted and provided on the outside of the connecting ring, and the spacing between adjacent fixing rods is greater than the diameter of the stator cover and the connecting ring.

[0015] Furthermore, a bayonet is fixedly provided on the outer side of one end of the stator housing away from the feed cavity, and the bayonet can be plugged and fixed with the discharge flange.

[0016] Furthermore, the disconnecting component includes a connecting head, which is fixedly connected to one end of the rotor located in the feed chamber, a connecting sleeve is sleeved on the outside of the connecting head, a plurality of limiting grooves are evenly distributed on the surface of the connecting head, a plurality of spiral grooves connected to the limiting grooves are opened on the outer surface of the connecting head, a ball head limiting pin is slidably connected at the corresponding position of each limiting groove in the connecting sleeve, each end of the ball head limiting pin can be inserted into the limiting groove, and each end of the ball head limiting pin can slide in 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 limit pin, each ball head limit pin is slidably connected to the corresponding threaded seat, a threaded pin is threadedly connected to the inner surface of each threaded seat, a spring is arranged between each threaded pin and the corresponding ball head limit pin, and one end of each threaded pin extending out of the threaded seat is threadedly connected to a locking nut.

[0018] Furthermore, a disengagement socket is respectively provided on the link sleeve and on one end of the rotor close to the link sleeve, and an inspection end cover is fixedly connected to a position corresponding to the link sleeve above the feed cavity.

[0019] Furthermore, one end of the feed cavity away from the stator housing is rotatably connected to a transmission shaft, and two ends of the transmission shaft and the connecting sleeve close to each other are respectively fixedly connected to two universal joints, and a telescopic rod is fixedly connected between the movable ends of the two universal joints, and the telescopic rod can freely extend and slide.

[0020] Furthermore, a sealing end cover is threadedly connected to one end of the feed cavity away from the stator cover, and the sealing end cover is rotatably connected to the transmission shaft. A sealing filler surrounding the outside of the transmission shaft is arranged between the sealing end cover and the transmission shaft, and an annular sealing filler is padded between the discharge flange and the stator cover.

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

[0022] Furthermore, the surface of the inner wall of the stator that is in contact with the rotor is coated with a wear-resistant coating, 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:

[0024] (1) By providing a wear-resistant coating on the inner wall of the stator, the wear of the rotor on the stator can be effectively reduced. The rotor is made of aluminized carbon steel, which can ensure the structural strength requirements of the rotor while forming a dense aluminum oxide film on the rotor surface, thereby effectively avoiding corrosion of the conveyed material to the rotor and reducing the wear on the stator.

[0025] (2) By setting the reverse threads at both ends of the connecting ring, the stator cover can be installed or removed by screwing the connecting ring, so that the worn stator and rotor can be easily replaced without removing other fixed connection positions of the single-screw pump, making maintenance work convenient and efficient, and maintenance work can be carried out more conveniently in an environment with limited maintenance space.

[0026] (3) Once large particles jam the rotor, the ball stop pin overcomes the elastic pressure of the spring to disengage the ball end of the ball stop pin from the limiting groove, and slides into the spiral groove, eventually completely separating the connecting sleeve from the connecting head, achieving automatic disconnection, and avoiding the rotor jamming while continuously applying power, which may cause damage to the internal parts of the single-screw pump, thereby increasing the 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 with a screwdriver or other tool, and the locking nut can be screwed to lock the position of the threaded pin, thereby adjusting the elastic pressure applied by the spring to the ball head limit pin, thereby adjusting the torque value required to disconnect the connecting sleeve and the connecting head, making the use more flexible and applicable to more scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0030] Figure 3 for Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0031] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0032] Figure 5 for Figure 3 A partial enlarged view of point C in the middle.

[0033] Figure 6 for Figure 3 A partial enlarged view of point D in the middle.

[0034] Figure 7 for Figure 3 A partial enlarged view of point E in the middle.

[0035] Figure 8 It is a schematic diagram of the structure of the connecting sleeve and the connecting head.

[0036] Fig. 9 for Figure 8 A partial enlarged view of point F in the middle.

[0037] Explanation of the reference numerals in the accompanying drawings: feed chamber 10; stator housing 11; stator 12; rotor 13; discharge flange 14; first bracket 15; gear box 16; motor 17; connecting collar 18; disassembly handle 19; second bracket 20; fixing rod 21; feed flange 22; maintenance end cover 23; pressure relief port 24; connecting sleeve 25; connecting joint 26; limiting groove 27; spiral slide groove 28; threaded seat 29; ball head limiting pin 30; spring 31; threaded pin 32; locking nut 33; disengagement socket 34; telescopic rod 35; universal joint 36; transmission shaft 37; sealing end cover 38; sealing packing 39; bayonet pin 40. DETAILED DESCRIPTION

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

[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 feed flange 22 is arranged on the top of the feed chamber 10, a pressure relief port 24 is opened at the bottom of the feed chamber 10, a sealing plug is arranged in the pressure relief port 24, a connecting collar 18 is threadedly connected to one end of the feed chamber 10, and the end of the connecting collar 18 away from the feed chamber 10 is threadedly connected to the stator housing 11, the thread pitches of the two ends of the connecting collar 18 are the same and the thread directions are opposite, and the end of the stator housing 11 away from the feed chamber 10 is sleeved with a A discharge flange 14 is provided, and four fixing rods 21 are fixedly connected between the discharge flange 14 and the feed chamber 10 in a circumferential distribution. The distance between every two adjacent fixing rods 21 is greater than the diameter of the connecting ring 18. Disassembly handles 19 can be inserted and arranged at multiple locations on the outside of the connecting ring 18. The stator 12 is fixedly connected to the stator cover 11, and the rotor 13 is meshingly connected to the stator 12. A bayonet 40 is fixedly arranged on the outside of one end of the stator cover 11 away from the feed chamber 10, and the bayonet 40 can be inserted and fixed to the discharge flange 14.

[0040] By setting the reverse threads at both ends of the connecting ring 18, the stator cover 11 can be installed or removed by screwing the connecting ring 18, so that the worn stator 12 and rotor 13 can be easily replaced without removing other fixed connection positions of the single-screw pump, making maintenance work convenient and efficient, and will not additionally damage the sealing state of other sealing surfaces.

[0041] By providing the bayonet 40 , the rotational freedom of the stator housing 11 can be locked when it is inserted into the discharge flange 14 , so that the feed cavity 10 will not rotate at will, thereby facilitating the operator to apply force to screw the connecting collar 18 .

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

[0043] By setting the ball head limit pin 30 to be inserted into the corresponding limit groove 27 under the elastic pressure of the spring 31, the connecting sleeve 25 and the connecting head 26 are stably connected to transfer kinetic energy to drive the rotor 13 to rotate. Once large-volume particles jam the rotor 13, the ball head limit pin 30 overcomes the elastic pressure of the spring 31 to make the ball head end of the ball head limit pin 30 disengage from the limit groove 27, and make the end of the ball head limit pin 30 slide in the spiral groove 28, finally making the connecting sleeve 25 completely disengaged from the connecting head 26, realizing automatic disconnection, avoiding the rotor 13 from being jammed while continuously applying power, causing damage to the internal parts of the single-screw pump, thereby increasing the service life and reducing the risk of damage.

[0044] Furthermore, by adjusting the depth of the threaded pin 32 in the threaded seat 29 by screwing, the elastic pressure applied by the spring 31 to the ball head limit pin 30 can be adjusted, and then the torque value required for disconnecting the connecting sleeve 25 and the connecting connector 26 can be adjusted according to the actual usage scenario, making the use more flexible and applicable to more scenarios.

[0045] like Figure 1-9 As shown, a disengagement plug hole 34 is respectively provided on the connecting sleeve 25 and on one end of the rotor 13 close to the connecting sleeve 25 , and an inspection end cover 23 is fixedly connected to the corresponding position of the connecting sleeve 25 above the feed cavity 10 .

[0046] By providing the inspection end cover 23, it is convenient for the operator to inspect and maintain the internal components of the feed chamber 10. When the worn rotor 13 needs to be replaced, the operator can use a tool such as a screwdriver to insert it into the two disengagement holes 34 respectively, and manually separate the connection state of the connecting sleeve 25 and the connecting head 26, so as to realize the function of conveniently replacing the rotor 13, save the time of maintenance and replacement, and improve the maintenance efficiency.

[0047] like Figure 1-9 As shown, one end of the feed cavity 10 away from the stator housing 11 is rotatably connected to a transmission shaft 37, one end of the first bracket 15 away from the feed cavity 10 is fixedly connected to a gear box 16, one end of the gear box 16 away from the first bracket 15 is fixedly connected to a motor 17, a power output end of the motor 17 is transmission-connected to the gear box 16, and a power output end of the gear box 16 is fixedly connected to one end of the transmission shaft 37 extending out of the feed cavity 10, two universal joints 36 are fixedly connected to the two ends of the transmission shaft 37 and the connecting sleeve 25 close to each other, a telescopic rod 35 is fixedly connected between the movable ends of the two universal joints 36, and the telescopic rod 35 can freely telescope and slide, and a sealing end cover 38 is threadedly connected to one end of the feed cavity 10 away from the stator housing 11, the sealing end cover 38 is rotatably connected to the transmission shaft 37, a sealing filler 39 surrounding the outside of the transmission shaft 37 is arranged between the sealing end cover 38 and the transmission shaft 37, and an annular sealing filler 39 is padded between the discharge flange 14 and the stator housing 11.

[0048] By setting the telescopic rod 35, a displacement space is reserved for the connecting sleeve 25 to be separated from the connecting head 26, so that the connecting sleeve 25 can be smoothly disconnected from the connecting head 26, and by setting the sealing packing 39, the sealing performance of the single-screw pump is effectively guaranteed to avoid leakage of the transported liquid material.

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

[0050] In this embodiment, initially, the operator installs the single-screw pump at a designated position, the feed flange 22 is connected to the feed pipe and the discharge flange 14 is connected to the discharge pipe, and the second bracket 20 and the first bracket 15 are stably fixed on the base or the ground. During operation, the operator starts the motor 17 to drive the telescopic rod 35 to rotate, and the telescopic rod 35 continuously performs circular pendulum motion and rotates at the same time. At this time, since the connecting sleeve 25 is stably connected to the connecting head 26, the power is transmitted to the connecting head 26 through the connecting sleeve 25, and finally drives the rotor 13 to perform spiral motion in the stator 12, and cooperates with the stator 12 to form a cavity that continuously moves toward the discharge flange 14, and the liquid material in the feed cavity 10 is continuously squeezed and transported toward the discharge flange 14.

[0051] When conveying materials, since the wear-resistant coating is arranged on the inner wall of the stator 12, the wear of the rotor 13 on the stator 12 is effectively reduced, thereby increasing the service life of the single-screw pump and reducing the maintenance times to save maintenance costs. At the same time, the rotor 13 is made of aluminized carbon steel that has been processed by aluminizing, which can ensure that the rotor 13 has its structural strength requirements while forming a dense aluminum oxide film on the surface of the rotor 13, thereby effectively avoiding corrosion of the rotor 13 by the conveyed materials, thereby increasing the service life of the rotor 13, and the surface of the rotor 13 will not produce rust spots due to corrosion, resulting in a rough surface, thereby avoiding the rough surface of the corroded rotor 13 from accelerating the wear of the stator 12.

[0052] During normal operation, the spring 31 provides elastic pressure so that the ball end of the ball limit pin 30 is always inserted into the corresponding limit groove 27. When the rotor 13 rotates to convey the material, the diameter of the solid particles mixed in the material exceeds the maximum diameter that the single screw pump can withstand, which can easily cause the rotor 13 to get stuck and unable to rotate. At this time, the motor 17 continues to output power. When the torque on the connecting sleeve 25 reaches a certain value, the elastic pressure of the spring 31 is not enough to resist the squeezing force applied by the limit groove 27 to the ball limit pin 30 in the axial direction of the ball limit pin 30, causing the end of the ball limit pin 30 to disengage from the limit groove 27, so that the connecting sleeve 25 and the connecting head 26 are no longer in transmission connection.

[0053] At the same time, the end of the ball limit pin 30 enters the spiral groove 28, and because the motor 17 always drives the connecting sleeve 25 to rotate, the ball limit pin 30 slides along the spiral groove 28 during the rotation of the connecting sleeve 25. When the end of the ball limit pin 30 completely slips out of the spiral groove 28, the connecting head 26 is completely disconnected from the connecting sleeve 25 to disconnect the power connection, so that the power of the motor 17 will no longer be transmitted to the rotor 13, thereby effectively protecting the rotor 13 from fracture and damage of the rotor 13 or other parts due to the continuously increased torque, thereby improving the service life of the single-screw pump.

[0054] During maintenance work, if the connecting sleeve 25 and the connecting head 26 are in an automatically disconnected state, the operator inserts the disassembly handle 19 into the corresponding hole of the connecting collar 18 and screws the connecting collar 18. When the disassembly handle 19 is blocked 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] Since the two ends of the connecting collar 18 are screwed in opposite directions, the connecting collar 18 is separated from the feed chamber 10 during the screwing process, and the stator cover 11 is detached from the discharge flange 14, and finally the stator cover 11 is detached from the discharge flange 14 and the feed chamber 10. The maintenance personnel first lift up the end of the stator cover 11 close to the discharge flange 14 to tilt the stator cover 11, the stator 12 and the rotor 13, and then directly pull the stator cover 11, the stator 12 and the rotor 13 out of the feed chamber 10 as a whole, so as to conveniently eliminate faults or replace worn stators 12 and rotors 13. Compared with the traditional single-screw pump structure, the maintenance and replacement process has fewer steps and is simple to operate. There is no need to disassemble additional parts, and in scenarios with limited maintenance space, disassembly and maintenance work can be carried out more conveniently.

[0056] When the connecting sleeve 25 and the connecting head 26 are still in a connected state during maintenance, the operator can remove the maintenance end cover 23, and use a screwdriver or other tool to insert into the disengagement socket 34 on the rotor 13 and the connecting sleeve 25 respectively, and manually apply opposite forces to rotate and separate the connecting sleeve 25 and the connecting head 26, and then remove the stator cover 11 to remove the stator cover 11, the stator 12 and the rotor 13 as a whole.

[0057] In actual use, due to the different usage scenarios of the single-screw pump and the different materials to be transported, the operator can use a screwdriver or other tools to adjust the depth of the threaded pin 32 in the threaded seat 29, and screw the locking nut 33 to lock the position of the threaded pin 32, and then adjust the elastic pressure applied by the spring 31 to the ball head limit pin 30, so as to adjust the torque value required to disconnect the connecting sleeve 25 and the connecting head 26, making it more flexible to use and suitable for more scenarios.

[0058] The above-mentioned gear box 16, motor 17, etc. are mature existing technologies and will not be described in detail herein.

[0059] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0060] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the product or system including the elements.

[0061] The above description shows and describes several preferred embodiments of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the application concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

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 cavity (10), wherein a stator casing (11) is disposed at one end of the feeding cavity (10), a stator (12) is fixedly connected inside the stator casing (11), a rotor (13) is meshedly disposed inside the stator (12), a discharge flange (14) is disposed at one end of the stator casing (11) away from the feeding cavity (10), and a plurality of fixing rods (21) are evenly distributed and fixedly connected between the discharge flange (14) and the feeding cavity (10); A feed flange (22), wherein a feed flange (22) communicating with the interior of the feed cavity (10) is disposed above the feed cavity (10), and a pressure relief port (24) is disposed at the bottom of the feed cavity (10) below the connecting sleeve (25); The end of the feed cavity (10) away from the stator housing (11) is fixedly connected to a first bracket (15), the end of the first bracket (15) away from the feed cavity (10) is provided with a driving component, the power output end of the driving component is transmission-connected to a disconnecting component, and the disconnecting component is transmission-connected to the end of the rotor (13).

2. A wear-resistant single screw pump that is easy to maintain and replace according to claim 1, characterized in that: A second bracket (20) fixedly connected to a fixing rod (21) is fixedly connected to one end of the feed cavity (10) close to the stator casing (11); the feed cavity (10) and the stator casing (11) are threadedly connected via a connecting collar (18); the thread pitches of the two ends of the connecting collar (18) are the same but the thread directions are opposite; a disassembly handle (19) can be inserted and arranged on the outside of the connecting collar (18); and the spacing between adjacent fixing rods (21) is greater than the diameters of the stator casing (11) and the connecting collar (18).

3. A wear-resistant single screw pump that is easy to maintain and replace according to claim 2, characterized in that: A bayonet (40) is fixedly provided on the outer side of one end of the stator housing (11) away from the feed cavity (10), and the bayonet (40) can be plugged and fixed to the discharge flange (14).

4. A wear-resistant single screw pump that is easy to maintain and replace according to claim 1, characterized in that: The disconnecting component comprises a connecting head (26), wherein the connecting head (26) is fixedly connected to one end of the rotor (13) located in the feed chamber (10), a connecting sleeve (25) is sleeved on the outer side of the connecting head (26), a plurality of limiting grooves (27) are evenly distributed on the surface of the connecting head (26), a plurality of spiral grooves (28) connected to the limiting grooves (27) are provided on the outer surface of the connecting head (26), a ball head limiting pin (30) is slidably connected at a position corresponding to each limiting groove (27) in the connecting sleeve (25), and each end of the ball head limiting pin (30) can be inserted into the limiting groove (27), and each end of the ball head limiting pin (30) can slide in the spiral groove (28).

5. A wear-resistant single screw pump that is easy to maintain and replace according to claim 4, characterized in that: A threaded seat (29) is fixedly connected to the outer side of the connecting sleeve (25) at a position corresponding to each ball stop pin (30); each ball stop pin (30) is slidably connected to the corresponding threaded seat (29); a threaded pin (32) is internally threadedly connected to each threaded seat (29); a spring (31) is provided between each threaded pin (32) and the corresponding ball stop pin (30); and one end of each threaded pin (32) extending out of the threaded seat (29) is threadedly connected to a locking nut (33).

6. A wear-resistant single screw pump that is easy to maintain and replace according to claim 4, characterized in that: A disengagement socket (34) is respectively provided on the link sleeve (25) and on one end of the rotor (13) close to the link sleeve (25), and an inspection end cover (23) is fixedly connected to a position corresponding to the link sleeve (25) above the feed chamber (10).

7. A wear-resistant single screw pump that is easy to maintain and replace according to claim 4, characterized in that: One end of the feed cavity (10) away from the stator housing (11) is rotatably connected to a transmission shaft (37); two ends of the transmission shaft (37) and the connecting sleeve (25) close to each other are respectively fixedly connected to two universal joints (36); a telescopic rod (35) is fixedly connected between the movable ends of the two universal joints (36); and the telescopic rod (35) can freely telescope and slide.

8. The wear-resistant single screw pump that is easy to maintain and replace according to claim 7, characterized in that: A sealing end cover (38) is threadedly connected to one end of the feed chamber (10) away from the stator housing (11); the sealing end cover (38) is rotatably connected to the transmission shaft (37); a sealing filler (39) surrounding the outside of the transmission shaft (37) is arranged between the sealing end cover (38) and the transmission shaft (37); and an annular sealing filler (39) is arranged between the discharge flange (14) and the stator housing (11).

9. The wear-resistant single screw pump that is easy to maintain and replace according to claim 7, characterized in that: The driving component comprises a gearbox (16), one end of the first bracket (15) away from the feeding chamber (10) is fixedly connected to the gearbox (16), one end of the gearbox (16) away from the first bracket (15) is fixedly connected to a motor (17), a power output end of the motor (17) is transmission-connected to the gearbox (16), and the power output end of the gearbox (16) is fixedly connected to one end of a transmission shaft (37).

10. The 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) that is in contact with the rotor (13) is coated with a wear-resistant coating, and the rotor (13) is made of aluminized carbon steel.

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