A screw pump with a reinforced screw structure

Abstract

The present application discloses a screw pump with a reinforced screw structure, which relates to the technical field of screw pumps, and includes an operating tube, a conveying tube and a discharge tube; a feed tube for feeding is fixed on the upper end of the operating tube; one end of the operating tube is open, and the open end of the operating tube is detachably and fixedly connected to an open end of the conveying tube; a drive assembly is fixed on the end of the operating tube away from the conveying tube, a drive shaft of the drive assembly passes through the operating tube and extends into the operating tube, and the top end of the drive shaft is connected to a universal joint; there are two universal joints, both of which are located inside the operating tube, and an intermediate shaft is fixedly connected between the two universal joints; a rotor is fixedly connected to the universal joint away from the drive assembly; a stator is arranged inside the conveying tube; the material of the stator is rubber, the rotor is located inside the stator, and the stator and the rotor are meshed with each other; the technical effect of significantly reducing the residual liquid medium in the sealing cavity inside the pump body of the screw pump can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of screw pumps, and in particular to a screw pump with a reinforced screw structure. Background Art

[0002] The single screw pump is a rotor type positive displacement pump, which relies on the meshing of the screw and the bushing to produce volume changes in the suction chamber and the discharge chamber to transport liquid. It is an internally meshed closed screw pump, and its main working parts are composed of a bushing (stator) with a double-headed spiral cavity and a single-headed spiral screw (rotor) meshing with it in the stator cavity. However, this single screw pump still has the following deficiencies in actual use: 1. Due to the large axial length of the screw and the rubber stator, and a continuous sealed cavity is formed between the rubber stator and the screw. When there is no liquid medium flowing in the pump, the rubber stator and the screw rub against each other, damaging the single screw pump and affecting the service life of the single screw pump.

[0003] For example, the Chinese invention patent with the authorization announcement number CN110905800B discloses a screw pump with equal wall thickness for oil extraction, including a base, a tee is fixedly installed on the upper part of one side of the base, an oil inlet is opened on the upper part of the tee, a bypass valve is opened on one side of the bottom of the tee, a power shaft is movably sleeved in the middle part of one end of the tee, and an intermediate shaft is fixedly connected in the middle part of one side of the power shaft. Through the coordinated arrangement of the first magnet and the second magnet, when the screw pump is working, the oil will enter the entire pump body through the oil inlet channel and the flow hole for lubrication, and at the same time, the pressure of the oil will squeeze the second magnet, so that part of the oil will enter the oil outlet at the same time for lubrication, so as to avoid idling of the screw pump after starting, and the rubber stator and the screw will be dryly rubbed against each other, causing damage to the rubber stator and the screw. When the screw pump is working, the oil pressure at the oil outlet is greater than the oil inlet channel, and the first magnet and the second magnet are adsorbed and fitted to seal, which will not affect the normal operation of the screw pump.

[0004] However, there is a problem with the above device during use, that is, some liquid medium may remain at the bottom of the sealed cavity inside the pump body. In winter, due to the low temperature, if there is a lot of liquid remaining in the sealed cavity, the liquid may freeze. The expansion caused by freezing may cause the rubber stator to be squeezed and deformed, or even cracked, which seriously affects the use of the screw pump. Therefore, it is necessary to take measures to extract the liquid inside the sealed cavity. Summary of the invention

[0005] The present application solves the technical problem in the prior art that some liquid medium will remain at the bottom of the sealed cavity inside the pump body of the screw pump by providing a screw pump with a reinforced screw structure; and achieves the technical effect of significantly reducing the residual liquid medium in the sealed cavity inside the pump body of the screw pump.

[0006] The present application provides a screw pump with a reinforced screw structure, comprising an operating pipe, a conveying pipe and a discharge pipe; the operating pipe is a horizontally arranged hollow cylinder as a whole, a feeding pipe for feeding is fixed to the upper end of the operating pipe, a bypass pipe is arranged at the bottom end of the operating pipe, and a valve is arranged on the bypass pipe; the conveying pipe is a horizontally arranged circular pipe; one end of the operating pipe is open, and the open end of the operating pipe is detachably and fixedly connected to an opening of one end of the conveying pipe, a driving assembly is fixed to the end of the operating pipe away from the conveying pipe, a driving shaft of the driving assembly passes through the operating pipe and extends into the operating pipe, and the top end of the driving shaft is connected to a universal joint; the number of the universal joints is two, both of which are located inside the operating pipe, and an intermediate shaft is fixedly connected between the two universal joints; the universal joint away from the driving assembly is fixedly connected to a rotor; a stator is arranged inside the conveying pipe; the material of the stator is rubber, the rotor is located inside the stator, and the stator and the rotor are meshed with each other.

[0007] Furthermore, the internal space of the stator is a sealed cavity; an internal channel is opened inside the rotor along the central axis, the end of the internal channel close to the universal joint is connected to the internal space of the operating tube, and the end of the internal channel away from the universal joint is connected to the inside of the discharge pipe through a control valve; the control valve can control opening and closing; a plurality of liquid outlets are opened on the rotor, one end of the liquid outlet is connected to the internal channel, and the other end is connected to the sealed cavity inside the stator.

[0008] Furthermore, the liquid outlet is a circular opening, and the axial direction of the liquid outlet is perpendicular to the length direction of the inner channel; the openings at one end of all the liquid outlets away from the inner channel are opened at the position of the outer wall of the rotor closest to the inner channel. At this time, the depth of the liquid outlet is the shallowest, and the depths of all the liquid outlets are the same, so that the multiple liquid outlets are distributed in a spiral shape along the length direction of the inner channel.

[0009] Furthermore, when the interior of the operating tube is filled with liquid medium, part of the liquid medium flows into between the stator and the rotor through the internal channel and the liquid outlet in the rotor, and since there is a gap between the liquid outlet and the stator, the liquid medium can enter between the stator and the rotor more fully. When the intermediate shaft drives the rotor to rotate, the area where dry friction occurs between the stator and the rotor is smaller.

[0010] Furthermore, the suction device can perform negative pressure suction on the inside of the operating tube through the bypass tube. At this time, the inside of the sealed cavity is in a negative pressure state due to the connection between the inner channel and the liquid outlet, and part of the liquid medium remaining in the sealed cavity is sucked away through the liquid outlet.

[0011] Furthermore, each of the liquid outlets is provided with a liquid guide tube, which is a multi-stage telescopic structure, and an elastic member is provided inside the liquid guide tube, so that the liquid guide tube tends to stretch; one end of the liquid guide tube away from the stator is fixed in the corresponding liquid outlet, and the liquid guide tube as a whole is a penetrating tube body, one end of the liquid guide tube away from the liquid outlet is in contact with the inner wall of the stator, and when the liquid guide tube is in a fully contracted state, the liquid guide tube can be contracted in the liquid outlet.

[0012] Furthermore, a liquid outlet ball is rotatably connected to an opening at one end of the liquid guide tube away from the rotor, and a portion of the liquid outlet ball extends out of the liquid guide tube, so that the liquid outlet ball plays the role of a bull's eye wheel, and the liquid guide tube slides more smoothly along the inner wall of the stator; the liquid outlet ball is hollow inside, and a plurality of openings are opened on its surface, and these openings enable the inside of the liquid guide tube to be connected with the sealed cavity; the number of openings on the liquid outlet ball is 6 to 12.

[0013] Furthermore, a spiral membrane is provided between two adjacent liquid guide tubes, so that all the spiral membranes are distributed in a spiral shape as a whole; in an initial state, the spiral membrane is rectangular, and is densely covered with flow holes; the two ends of the spiral membrane close to the stator are respectively detachably connected to the ends of the two adjacent liquid guide tubes close to the stator, and the side of the spiral membrane away from the stator is fixed on the outer wall of the rotor; the spiral membrane is made of elastic rubber and can be deformed according to the telescopic state of the liquid guide tube.

[0014] Furthermore, when the rotor rotates, the spiral membrane can assist the medium in moving, and at the same time can filter and break up the medium, screening out solid particles in the medium whose diameter is larger than the flow holes of the spiral membrane; when the medium in the operating tube needs to be discharged quickly, as the rotor rotates, the spiral membrane will wipe against the inner wall of the stator, thereby gathering the residual medium in the sealed cavity, making it easier for the liquid catheter to suction and discharge.

[0015] Furthermore, the spiral membrane includes contact membrane 1 and contact membrane 2. The spiral membrane is a rectangular bag structure as a whole. Contact membrane 1 is the side of the spiral membrane close to the universal joint, and contact membrane 2 is the side of the spiral membrane close to the universal joint. When pumping, the medium first contacts contact membrane 1, and then contacts contact membrane 2 after passing through contact membrane 1; the diameter of the flow hole on contact membrane 1 is larger than the diameter of the flow hole on contact membrane 2, so that solid particles in the medium with a diameter between the diameters of the flow holes of contact membrane 1 and contact membrane 2 can be retained in the spiral membrane and are difficult to flow into the discharge pipe with the medium; contact membrane 1 and contact membrane 2 are detachably connected together.

[0016] One or more technical solutions provided in this application have at least the following technical effects or advantages:

[0017] A screw pump with a reinforced screw structure is provided, which includes an operating tube and a conveying tube; a feed tube for feeding is fixed to the upper end of the operating tube; one end of the operating tube is open, and the open end of the operating tube is detachably fixedly connected to an open end of the conveying tube; a drive assembly is fixed to the end of the operating tube away from the conveying tube, a drive shaft of the drive assembly passes through the operating tube and extends into the operating tube, and the top end of the drive shaft is connected to a universal joint; there are two universal joints, both of which are located inside the operating tube, and an intermediate shaft is fixedly connected between the two universal joints; a rotor is fixedly connected to the universal joint away from the drive assembly; a stator is arranged inside the conveying tube; the material of the stator is rubber, the rotor is located inside the stator, and the stator and the rotor are meshed with each other; the technical problem that part of the liquid medium will remain at the bottom of the sealed cavity inside the pump body of the screw pump in the prior art is effectively solved; thereby achieving the technical effect of significantly reducing the residual liquid medium in the sealed cavity inside the pump body of the screw pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a screw pump with a reinforced screw structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the rotor structure of a screw pump with a reinforced screw structure of the present invention;

[0020] Figure 3 It is a schematic side view of the rotor of the screw pump with a reinforced screw structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the screw pump with a reinforced screw structure of the present invention when all the liquid guide tubes are fully extended;

[0022] Figure 5 It is a schematic diagram of the screw pump with a reinforced screw structure of the present invention when all the liquid guide tubes are fully retracted;

[0023] Figure 6 It is a schematic diagram of the position of the liquid outlet ball of the screw pump with a reinforced screw structure of the present invention;

[0024] Figure 7 It is a schematic diagram of the liquid outlet ball structure of the screw pump with a reinforced screw structure of the present invention;

[0025] Figure 8 It is a schematic diagram of the distribution of the liquid guide tubes of the screw pump with a reinforced screw structure of the present invention;

[0026] Fig. 9 It is a schematic diagram of the spiral membrane distribution of the screw pump with a reinforced screw structure of the present invention;

[0027] Fig.10 It is a schematic diagram of the spiral membrane connection of the screw pump with a reinforced screw structure of the present invention;

[0028] Fig.11 The figure is a schematic diagram of the spiral membrane structure of the screw pump with a reinforced screw structure according to the present invention.

[0029] In the figure:

[0030] An operating pipe 100, a feed pipe 110, a bypass pipe 120, a drive assembly 130, a universal joint 140, and an intermediate shaft 150;

[0031] The delivery pipe 200, the stator 210, the rotor 220, the inner channel 221, the liquid outlet 222, the control valve 223, the liquid guide tube 230, the liquid outlet ball 231, the spiral membrane 240, the contact membrane 1 241, and the contact membrane 2 242;

[0032] Discharge pipe 300. DETAILED DESCRIPTION

[0033] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0034] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Embodiment 1: Figure 1As shown, the screw pump with a reinforced screw structure of the present application includes an operating pipe 100, a delivery pipe 200 and a discharge pipe 300; the operating pipe 100 is a hollow cylinder arranged horizontally as a whole, a feed pipe 110 for feeding is fixed at the upper end of the operating pipe 100, a bypass pipe 120 is arranged at the bottom end of the operating pipe 100, and a valve is arranged on the bypass pipe 120; the delivery pipe 200 is a horizontally arranged circular pipe; one end of the operating pipe 100 is open, and the open end of the operating pipe 100 is detachably fixedly connected to an open end of the delivery pipe 200, and a drive assembly 130 is fixed to the end of the operating pipe 100 away from the delivery pipe 200, and the drive shaft of the drive assembly 130 passes through the operating pipe 100 and extends into the operating pipe 100, and the top end of the drive shaft is connected to a universal joint 140; There are two universal joints 140, both of which are located inside the operating tube 100, and an intermediate shaft 150 is fixedly connected between the two universal joints 140; the universal joint 140 away from the driving assembly 130 is fixedly connected to the rotor 220; a stator 210 is arranged inside the conveying tube 200, which is a bushing with a double-headed spiral cavity, which is a prior art; the material of the stator 210 is rubber, and the rotor 220 is located inside the stator 210, and the stator 210 and the rotor 220 are meshed with each other, and the rotor 220 is a single-headed eccentric screw; the intermediate shaft 150 drives the rotor 220 to perform planetary rotation around the center of the stator 210 through the universal joint 140; the end of the conveying tube 200 away from the operating tube 100 is detachably fixedly connected to the discharge tube 300.

[0037] Preferably, support frames are provided at the bottom ends of the operating pipe 100 , the conveying pipe 200 and the discharge pipe 300 .

[0038] like Figure 2 and Figure 3 As shown, the internal space of the stator 210 is a sealed cavity; an inner channel 221 is opened inside the rotor 220 along the central axis, and the end of the inner channel 221 close to the universal joint 140 is connected to the internal space of the operating tube 100, and the end of the inner channel 221 away from the universal joint 140 is connected to the inside of the discharge pipe 300 through a control valve 223; the control valve 223 can control the opening and closing, which is a prior art; a plurality of liquid outlets 222 are opened on the rotor 220, one end of the liquid outlet 222 is connected to the inner channel 221, and the other end is connected to the sealed cavity inside the stator 210; the liquid outlet 222 is a circular opening, and the axial direction of the liquid outlet 222 is perpendicular to the length direction of the inner channel 221; the openings of all the liquid outlets 222 at the ends away from the inner channel 221 are opened at the outer wall position of the rotor 220 closest to the inner channel 221 (such as Figure 3As shown), at this time, the depth of the liquid outlet 222 is the shallowest, and the depths of all the liquid outlets 222 are the same, so that the multiple liquid outlets 222 are distributed in a spiral shape along the length direction of the inner channel 221; when the operating tube 100 is filled with liquid medium, part of the liquid medium flows into the space between the stator 210 and the rotor 220 through the inner channel 221 and the liquid outlet 222 in the rotor 220, and because there is a gap between the liquid outlet 222 and the stator 210, the liquid medium can enter the space between the stator 210 and the rotor 220 more fully, and when the intermediate shaft 150 drives the rotor 220 to rotate, the area where the stator 210 and the rotor 220 have dry friction is smaller; the inside of the operating tube 100 can be sucked under negative pressure through the bypass pipe 120 by the suction device in the prior art, and at this time, the inside of the sealed cavity is in a negative pressure state under the connection between the inner channel 221 and the liquid outlet 222, and part of the liquid medium remaining in the sealed cavity is sucked away through the liquid outlet 222.

[0039] Preferably, the number of the liquid outlets 222 is 20 to 50.

[0040] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0041] 1. By providing an inner channel 221 and a plurality of liquid outlets 222 inside the rotor 220, the liquid medium inside the operating tube 100 can fully flow into between the stator 210 and the rotor 220, effectively reducing the wear caused by dry friction between them;

[0042] 2. The special design of the liquid outlet 222 (spiral distribution, shallow and uniform depth) further ensures that the liquid medium can be evenly distributed in the meshing area of ​​the stator 210 and the rotor 220, further reducing the area of ​​dry friction;

[0043] 3. Since the liquid medium can fully enter the sealed cavity between the stator 210 and the rotor 220, the lubricity and fluidity of the pumped medium are improved, thereby improving the pumping efficiency of the screw pump, reducing the energy loss caused by dry friction, and enabling the screw pump to transport more liquid medium under the same driving force;

[0044] 4. The wear caused by dry friction is reduced, which means that the service life of the main components of the screw pump (such as the stator 210 and the rotor 220) is extended, and the frequency of maintenance and replacement of components is reduced, thereby reducing the use cost of the screw pump;

[0045] 5. At the initial stage of starting the screw pump, since the liquid medium has fully entered between the stator 210 and the rotor 220, the problem of starting difficulty caused by dry friction is avoided;

[0046] 6. The operating pipe 100, the conveying pipe 200 and the discharge pipe 300 are detachably fixedly connected, which is convenient for disassembly, cleaning and maintenance of the screw pump. The setting of the control valve 223 enables the operator to conveniently control the opening and closing of the inner channel 221, further improving the maintenance convenience of the screw pump;

[0047] 7. The setting of the bypass pipe 120 allows the medium in the operating pipe 100 to be quickly discharged at the end of transportation or in an emergency, thereby improving the safety of the screw pump and achieving the technical effect of reducing the residual medium in the sealed cavity inside the screw pump body.

[0048] Embodiment 2: In the above embodiment, if the gap between the liquid outlet 222 and the bottom of the sealed cavity is large, some medium will still remain in the sealed cavity; the embodiment of the present application is optimized based on the above embodiment.

[0049] like Figure 4 , Figure 5 and Figure 8 As shown, each of the liquid outlets 222 is provided with a liquid guide tube 230, which is a multi-stage telescopic structure, and an elastic member (such as a spring, not shown in the figure) is provided inside the liquid guide tube 230, and the elastic member is a prior art, so that the liquid guide tube 230 tends to stretch; the end of the liquid guide tube 230 away from the stator 210 is fixed in the corresponding liquid outlet 222, and the liquid guide tube 230 is a penetrating tube body as a whole, and the end of the liquid guide tube 230 away from the liquid outlet 222 abuts against the inner wall of the stator 210, and when the liquid guide tube 230 is in a fully contracted state, the liquid guide tube 230 It can be retracted in the liquid outlet 222; as the rotor 220 rotates, the liquid guide tube 230 rotates accordingly, and the distance between the liquid outlet 222 and the inner wall of the stator 210 changes continuously, so that the corresponding liquid guide tube 230 is in a continuously expanding and contracting state. At this time, the liquid guide tube 230 in the rotating state can break up some relatively viscous or agglomerated media, so that the media can be pumped more smoothly. When the medium in the operating tube 100 needs to be quickly discharged at the end of the delivery or in an emergency, the liquid guide tube 230 can extend to the bottom of the sealed cavity, so that the residual medium in the sealed cavity can be sucked out more thoroughly.

[0050] Further, such as Figure 6 and Figure 7 As shown, a liquid outlet ball 231 is rotatably connected to an opening at one end of the liquid guide tube 230 away from the rotor 220, and a portion of the liquid outlet ball 231 extends out of the liquid guide tube 230, so that the liquid outlet ball 231 plays the role of a bull's eye wheel, and the liquid guide tube 230 slides more smoothly along the inner wall of the stator 210; the liquid outlet ball 231 is hollow inside, and a plurality of openings are opened on its surface, and these openings enable the inside of the liquid guide tube 230 to be connected with the sealed cavity; the number of openings on the liquid outlet ball 231 is 6 to 12.

[0051] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0052] 1. By arranging a multi-stage telescopic liquid guide tube 230 inside each liquid outlet 222, the liquid guide tube 230 can be continuously telescoped during the rotation of the rotor 220, effectively breaking up the relatively viscous or agglomerated medium, so that the medium can be pumped more smoothly, thereby improving the medium conveying efficiency of the screw pump, especially when dealing with viscous or agglomerated medium;

[0053] 2. The telescopic movement of the liquid guide tube 230 not only helps to disperse the medium, but also ensures that the medium is more evenly distributed in the sealed cavity between the stator 210 and the rotor 220, avoiding the accumulation of the medium in a local area, thereby further improving the pumping efficiency of the screw pump;

[0054] 3. When the medium in the operating tube 100 needs to be quickly discharged after the delivery or in an emergency, the liquid guide tube 230 can extend to the bottom of the sealed cavity, so that the residual medium in the sealed cavity can be sucked out more thoroughly, reducing the residual medium, improving the cleaning effect of the screw pump, and also preparing for the next use;

[0055] 4. A liquid outlet ball 231 is provided at one end of the liquid guide tube 230 away from the rotor 220. The liquid outlet ball 231 acts as a bull's eye wheel, making the liquid guide tube 230 slide more smoothly along the inner wall of the stator 210, reducing friction and wear between the two, and further extending the service life of the screw pump;

[0056] 5. The liquid outlet ball 231 is hollow inside and has multiple openings thereon, so that the inside of the liquid guide tube 230 is connected to the sealed cavity through the liquid outlet ball 231, which increases the flow area of ​​the medium and enhances the fluidity of the medium;

[0057] 6. By setting the liquid guide tube 230 and the liquid outlet ball 231, the screw pump can be operated more smoothly, reducing the number of shutdowns for maintenance due to medium blockage or poor pumping, and improving operational convenience.

[0058] Embodiment 3: In the above embodiment, if there are many agglomerates in the medium, some agglomerates will not be broken up by the liquid guiding tube 230 and will flow into the discharge pipe 300; the embodiment of the present application is optimized based on the above embodiment.

[0059] like Fig. 9 and Fig.10As shown, a spiral membrane 240 is arranged between two adjacent liquid guide tubes 230, so that all the spiral membranes 240 are distributed in a spiral shape as a whole; in the initial state, the spiral membrane 240 is rectangular, and the spiral membrane 240 is densely covered with flow holes; the two ends of the side of the spiral membrane 240 close to the stator 210 are detachably connected to the ends of the two adjacent liquid guide tubes 230 close to the stator 210, and the side of the spiral membrane 240 away from the stator 210 is fixed on the outer wall of the rotor 220; the material of the spiral membrane 240 is elastic rubber, which can be adjusted according to the liquid guide tube 230. The liquid tube 230 is deformed in a telescopic state; when the rotor 220 rotates, the spiral membrane 240 can assist the medium to move, and at the same time can filter and break up the medium, and screen out solid particles in the medium whose diameter is larger than the flow holes of the spiral membrane 240; when the medium in the operating tube 100 needs to be quickly discharged at the end of transportation or in an emergency, as the rotor 220 rotates, the spiral membrane 240 will wipe against the inner wall of the stator 210, and then gather the residual medium in the sealed cavity, which is convenient for the liquid guide tube 230 to suction and discharge.

[0060] Preferably, the flow holes on the spiral membrane 240 have diameters of various specifications, so that a suitable spiral membrane 240 can be selected according to the characteristics of the medium.

[0061] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0062] 1. By arranging a spiral membrane 240 between two adjacent liquid guiding tubes 230, the spiral membrane 240 can be deformed according to the expansion and contraction state of the liquid guiding tubes 230, thereby assisting the movement of the medium;

[0063] 2. The flow holes on the spiral membrane 240 can filter the medium and filter out solid particles in the medium whose diameter is larger than the flow holes, thereby improving the purity of the medium;

[0064] 3. The spiral structure of the spiral membrane 240 can further break up the medium, further improving the uniformity and efficiency of medium transportation;

[0065] 4. When the medium in the operating tube 100 needs to be quickly discharged after the delivery or in an emergency, the spiral membrane 240 will wipe the inner wall of the stator 210 as the rotor 220 rotates, thereby gathering the residual medium in the sealed cavity, making it easier for the medium in the sealed cavity to be sucked out by the liquid guide tube 230, thereby greatly improving the cleaning effect of the screw pump;

[0066] 5. The diameter of the flow hole on the spiral membrane 240 has various specifications, and the spiral membrane 240 of different specifications can be selected according to different media, so that the screw pump can adapt to the needs of conveying more types of media, thereby improving the versatility and flexibility of the screw pump;

[0067] 6. Since the spiral membrane 240 is made of elastic rubber and has a certain wear resistance, the spiral membrane 240 can rub against the inner wall of the stator 210 during the rotation of the rotor 220, thereby reducing the direct contact between the rotor 220 and the inner wall of the stator 210, reducing the wear of the rotor 220, and extending the service life of the screw pump;

[0068] 7. The spiral distribution structure of the spiral membrane 240 enables the medium to form a stable flow state during the transportation process, reducing the fluctuation and impact of the medium during the transportation process, thereby improving the pumping stability of the screw pump.

[0069] Embodiment 4: In the above embodiment, if there are a lot of solid impurities in the medium, the spiral membrane 240 may be blocked; the embodiment of the present application is optimized based on the above embodiment.

[0070] like Fig.11 As shown, the spiral membrane 240 includes a contact membrane 1 241 and a contact membrane 242. The spiral membrane 240 is a rectangular bag structure as a whole. The contact membrane 1 241 is the side of the spiral membrane 240 close to the universal joint 140, and the contact membrane 2 242 is the side of the spiral membrane 240 close to the universal joint 140. When pumping, the medium first contacts with the contact membrane 1 241, and then contacts with the contact membrane 2 242 after passing through the contact membrane 1 241; the diameter of the flow hole on the contact membrane 1 241 is larger than the diameter of the flow hole on the contact membrane 242, so that solid particles in the medium with a diameter between the flow hole diameters of the contact membrane 1 241 and the contact membrane 2 242 can be retained in the spiral membrane 240, and it is difficult for them to flow into the discharge pipe 300 with the medium; the contact membrane 1 241 and the contact membrane 2 242 are detachably connected together.

[0071] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0072] 1. By arranging two layers of contact membranes with different pore sizes (contact membrane 1 241 and contact membrane 2 242) in the spiral membrane 240, solid particles in the medium can be filtered more effectively, so that the medium first passes through the contact membrane 1 241 with a larger pore size and then passes through the contact membrane 2 242 with a smaller pore size during the pumping process, thereby achieving graded filtration of solid particles;

[0073] 2. Since the flow hole diameter of contact membrane 1 241 is larger than that of contact membrane 242, large particles in the medium are first retained by contact membrane 1 241, while smaller particles continue to flow to contact membrane 2 242, which can significantly reduce the risk of blockage of contact membrane 2 242 and ensure the continuous and stable operation of the system, so that the medium undergoes multiple filtration and separation during the pumping process, thereby improving the effect of medium separation and significantly improving the quality and performance of the product.

[0074] 3. By effectively intercepting and separating solid particles in the medium, the wear and erosion of the internal components of the equipment by solid particles can be reduced, thereby extending the service life of the equipment;

[0075] 4. Since the spiral membrane 240 adopts a rectangular bag structure, the specifications of the spiral membrane 240 can be easily adjusted according to actual needs to meet the requirements of different flow rates and filtering precisions, thereby improving the operational flexibility and adaptability of the equipment.

[0076] 5. The double-layer spiral membrane 240 allows for cleaning or replacing of a single layer without replacing the entire spiral membrane 240 at the same time, thereby reducing maintenance costs and improving equipment availability.

[0077] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screw pump with a reinforced screw structure, characterized in that: The invention comprises an operating pipe (100), a conveying pipe (200) and a discharge pipe (300); the operating pipe (100) is a hollow cylinder arranged horizontally as a whole; a feeding pipe (110) for feeding is fixed at the upper end of the operating pipe (100); a bypass pipe (120) is arranged at the bottom end of the operating pipe (100); a valve is arranged on the bypass pipe (120); the conveying pipe (200) is a circular pipe arranged horizontally; one end of the operating pipe (100) is open, the open end of the operating pipe (100) is detachably fixedly connected to the opening of one end of the conveying pipe (200); a driving assembly (130) is fixed at one end of the operating pipe (100) away from the conveying pipe (200); the driving assembly (130) ) passes through the operating tube (100) and extends into the operating tube (100), and the top end of the driving shaft is connected to a universal joint (140); there are two universal joints (140), both of which are located inside the operating tube (100), and an intermediate shaft (150) is fixedly connected between the two universal joints (140); the universal joint (140) away from the driving assembly (130) is fixedly connected to a rotor (220); a stator (210) is arranged inside the delivery tube (200); the material of the stator (210) is rubber, the rotor (220) is located inside the stator (210), and the stator (210) and the rotor (220) are meshed with each other; The internal space of the stator (210) is a sealed cavity; an internal channel (221) is provided inside the rotor (220) along the central axis; one end of the internal channel (221) close to the universal joint (140) is connected to the internal space of the operating tube (100); and one end of the internal channel (221) away from the universal joint (140) is connected to the inside of the discharge pipe (300) through a control valve (223); the control valve (223) can be controlled to open and close; a plurality of liquid outlets (222) are provided on the rotor (220); one end of the liquid outlet (222) is connected to the internal channel (221), and the other end is connected to the sealed cavity inside the stator (210); Each of the liquid outlets (222) is provided with a liquid guide tube (230), which is a multi-stage telescopic structure, and an elastic member is provided inside the liquid guide tube (230), so that the liquid guide tube (230) tends to stretch; one end of the liquid guide tube (230) away from the stator (210) is fixed in the corresponding liquid outlet (222), and the liquid guide tube (230) is a penetrating tube body as a whole, and one end of the liquid guide tube (230) away from the liquid outlet (222) abuts against the inner wall of the stator (210), and when the liquid guide tube (230) is in a fully contracted state, the liquid guide tube (230) can be contracted in the liquid outlet (222); A liquid outlet ball (231) is rotatably connected to an opening at one end of the liquid guide tube (230) away from the rotor (220), and a portion of the liquid outlet ball (231) extends out of the liquid guide tube (230), so that the liquid outlet ball (231) plays the role of a bull's eye wheel, and the liquid guide tube (230) slides more smoothly along the inner wall of the stator (210); the liquid outlet ball (231) is hollow inside, and a plurality of openings are provided on its surface, and these openings enable the inside of the liquid guide tube (230) to communicate with the sealed cavity; the number of openings on the liquid outlet ball (231) is 6 to 12.

2. The screw pump with a reinforced screw structure according to claim 1, characterized in that: The liquid outlet (222) is a circular opening, and the axial direction of the liquid outlet (222) is perpendicular to the length direction of the inner channel (221); the openings at one end of all the liquid outlets (222) away from the inner channel (221) are opened at the outer wall of the rotor (220) closest to the inner channel (221), at which time the depth of the liquid outlet (222) is the shallowest, and the depths of all the liquid outlets (222) are the same, so that the multiple liquid outlets (222) are distributed in a spiral shape along the length direction of the inner channel (221).

3. The screw pump with a reinforced screw structure according to claim 2, characterized in that: When the interior of the operating tube (100) is filled with liquid medium, part of the liquid medium flows into the space between the stator (210) and the rotor (220) through the inner channel (221) and the liquid outlet (222) in the rotor (220), and because there is a gap between the liquid outlet (222) and the stator (210), the liquid medium can relatively fully enter the space between the stator (210) and the rotor (220). When the intermediate shaft (150) drives the rotor (220) to rotate, the area where dry friction occurs between the stator (210) and the rotor (220) is smaller.

4. The screw pump with a reinforced screw structure according to claim 2, characterized in that: The inside of the operating tube (100) can be sucked under negative pressure by a suction device through the bypass tube (120). At this time, the inside of the sealed cavity is in a negative pressure state due to the connection between the inner channel (221) and the liquid outlet (222), and part of the liquid medium remaining in the sealed cavity is sucked away through the liquid outlet (222).

5. The screw pump with a reinforced screw structure according to claim 1, characterized in that: A spiral membrane (240) is provided between two adjacent liquid guide tubes (230), so that all the spiral membranes (240) are distributed in a spiral shape as a whole; in an initial state, the spiral membrane (240) is rectangular, and the spiral membrane (240) is densely covered with flow holes; the two ends of the spiral membrane (240) close to the stator (210) are respectively detachably connected to the ends of the two adjacent liquid guide tubes (230) close to the stator (210), and the side of the spiral membrane (240) away from the stator (210) is fixed on the outer wall of the rotor (220); the spiral membrane (240) is made of elastic rubber and can be deformed according to the expansion and contraction state of the liquid guide tube (230).

6. The screw pump with a reinforced screw structure according to claim 5, characterized in that: When the rotor (220) rotates, the spiral membrane (240) can assist the medium in moving, and can filter and break up the medium, thereby screening out solid particles in the medium whose diameter is larger than the flow holes of the spiral membrane (240); when the medium in the operating tube (100) needs to be quickly discharged, as the rotor (220) rotates, the spiral membrane (240) will wipe against the inner wall of the stator (210), thereby gathering the medium remaining in the sealed cavity, thereby facilitating the suction and discharge of the medium by the liquid guide tube (230).

7. The screw pump with a reinforced screw structure according to claim 6, characterized in that: The spiral membrane (240) comprises a contact membrane 1 (241) and a contact membrane 2 (242). The spiral membrane (240) is a rectangular bag structure as a whole. The contact membrane 1 (241) is the side of the spiral membrane (240) close to the universal joint (140), and the contact membrane 2 (242) is the side of the spiral membrane (240) close to the universal joint (140). When pumping, the medium first contacts the contact membrane 1 (241), and then contacts the contact membrane 2 (242) after passing through the contact membrane 1 (241). The diameter of the flow hole on the contact membrane 1 (241) is larger than the diameter of the flow hole on the contact membrane 2 (242), so that solid particles in the medium with a diameter between the diameters of the flow holes of the contact membrane 1 (241) and the contact membrane 2 (242) can be retained in the spiral membrane (240) and are difficult to flow into the discharge pipe (300) along with the medium. The contact membrane 1 (241) and the contact membrane 2 (242) are detachably connected together.

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