Low-resistance piston pump

Abstract

The invention relates to the technical field of piston pumps, and provides a low-resistance piston pump which forms an auxiliary driving structure for liquid in a shell and forms auxiliary assistance through movement of a matched piston body, so that active movement of the driven liquid is achieved, resistance borne by the piston body for liquid driving is reduced, and the service life of the piston body is prolonged. The invention relates to an anti-drag piston, in particular to an anti-drag piston, which guarantees stable liquid conveying, reduces running resistance of a piston body and prolongs the running life of the piston body, and comprises a shell, a driving motor, an inner suction anti-drag structure and an outer discharge anti-drag structure, the driving motor is mounted on the shell, and a driving penetrating column and the piston body are mounted in the shell; the driving motor is used for driving a driving piston body of the penetrating column to be installed on the driving penetrating column through a buffering assembly, the inner suction resistance reduction structure and the outer discharge resistance reduction structure comprise a first end shell and a second end shell correspondingly, the first end shell and the second end shell are both connected with the shell, and inner supporting frames are connected into the first end shell and the second end shell correspondingly; the two inner supporting frames are provided with an inner pushing auxiliary impeller and an outer discharging auxiliary impeller respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of piston pumps, in particular to a low-resistance piston pump. BACKGROUND

[0002] The piston pump, also known as an electric reciprocating pump, is a volumetric pump that changes the working volume by reciprocating movement of the piston in the pump cylinder to realize liquid suction and discharge. The key and core functional component of the piston pump is the piston, and the contact sealing between the piston and the pump body is also one of the key indicators for measuring the piston pump. In order to reduce the load of the piston pump in operation, we propose a low-resistance piston pump.

[0003] After searching, the patent with Chinese patent application number CN201710253427.6 discloses a piston pump, which is generally described as including a housing, a drive motor, a drive shaft, a transmission mechanism, two pistons, and two piston cylinders respectively accommodating the pistons. The drive shaft is fixed on the housing, the drive motor is connected with one end of the drive shaft, the transmission mechanism is arranged inside the housing, the two pistons are respectively connected with one end of the transmission mechanism, the piston cylinder is fixed on the housing, one end of the piston cylinder is sleeved on the piston, and the other end has at least one medium exchange port. The drive motor drives the drive shaft to rotate, the drive shaft drives the piston to move in the piston cylinder through the transmission mechanism, and a sealed cavity with variable volume is formed in the piston cylinder. When the transmission mechanism drives the two pistons to move, the moving directions of the two pistons are consistent, the volumes of the sealed cavities respectively formed in the two piston cylinders change in opposite directions, and the flow directions of the media flowing through the respective medium exchange ports in the two piston cylinders are opposite. The power utilization efficiency is improved by one time. The patent with Chinese patent application number CN202210169885.2 discloses a medical piston pump, which is generally described as including a pump body, a water inlet pipe, and a water outlet pipe. The pump body is provided with a piston cavity, the piston cavity is provided with a piston, the head end of the piston cavity is respectively communicated with the water inlet pipe and the water outlet pipe, the water inlet pipe is provided with a water inlet check valve, and the water outlet pipe is provided with a water outlet check valve. When in use, the medical piston pump is limited by the water inlet check valve and the water outlet check valve, and through high-speed piston movement of the piston in the piston cavity, water flow is driven to enter the piston cavity from the water inlet pipe and then continuously and stably flow out from the piston cavity through the water outlet pipe at high pressure, so that the function of a water knife can be realized.

[0004] Although the above two sets of prior art solutions can be used as piston pumps, both of them realize the movement of the piston body by a single electric drive. However, the piston body reciprocates between movement and stillness during reciprocating movement in the pump body, so there will inevitably be a large resistance during the process from stillness to movement. The large resistance will also cause the structure of the piston to be required to be improved and the sealing requirement to be strengthened. Therefore, how to reduce the running resistance of the piston is the key to improving the service life of the piston pump. SUMMARY

[0005] In view of the deficiencies of the prior art, the low-resistance piston pump provided by the application forms an auxiliary driving structure for the liquid in the shell to form an auxiliary force matching the movement of the piston body, thereby achieving the active movement of the liquid driven by the piston body, reducing the resistance borne by the piston body when driving the liquid, ensuring the stable delivery of the liquid while reducing the operating resistance of the piston body, and improving the operating life of the piston body.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme: a low-resistance piston pump, comprising a shell and a driving motor, further comprising an internal suction resistance reduction structure and an external discharge resistance reduction structure, the driving motor is installed on the shell, a driving penetrating column and a piston body are installed in the shell, the driving motor is used to drive the driving penetrating column to drive the piston body, the piston body is installed on the driving penetrating column through a buffer assembly, the internal suction resistance reduction structure and the external discharge resistance reduction structure respectively comprise a first end shell and a second end shell, the first end shell and the second end shell are connected with the shell, an internal support frame is fixedly connected in the first end shell and the second end shell, an internal push auxiliary impeller and an external discharge auxiliary impeller are respectively installed on the two internal support frames, the driving penetrating column is connected with a composite linkage structure, and the composite linkage structure is used for linkage driving of the internal push auxiliary impeller and the external discharge auxiliary impeller.

[0007] Preferably, the internal push auxiliary impeller and the external discharge auxiliary impeller both comprise a rotating shaft and a rotating sleeve, the two rotating shafts are respectively rotationally connected with the two internal support frames, the two rotating shafts are respectively rotationally connected with the two rotating sleeves, a one-way ratchet is rotationally connected on each of the two rotating shafts, an elastic spring is connected with each of the two one-way ratchets, the two elastic springs are respectively connected with the two rotating shafts, a one-way ratchet wheel is fixedly connected in each of the two rotating sleeves, each of the two one-way ratchet wheels is matched with each of the two one-way ratchets, and a plurality of cutting fan blades are fixedly connected on each of the two rotating sleeves.

[0008] Preferably, the composite linkage structure comprises a synchronous push frame, the synchronous push frame is fixedly connected with the driving penetrating column, the synchronous push frame is connected with two transmission bars, each of the two transmission bars is connected with a driving sleeve, and each of the two driving sleeves is threadedly connected with each of the two rotating shafts.

[0009] Preferably, each of the two driving sleeves is fixedly connected with a first insertion block and a second insertion block, each of the two first insertion blocks is matched with a first insertion sleeve, each of the two second insertion blocks is matched with a second insertion sleeve, each of the two first insertion sleeves is fixedly connected with a first cladding cylinder, each of the two second insertion sleeves is fixedly connected with a second cladding cylinder, each of the two first cladding cylinders is fixedly connected with each of the two second cladding cylinders, each of the two second cladding cylinders is fixedly connected with a hinged frame, and each of the two hinged frames is rotationally connected with each of the two transmission bars.

[0010] Preferably, the buffer assembly comprises a stepped collar and a sealing end cover, an intermediate hole is formed in the piston body, the stepped collar is fixedly connected in the intermediate hole, the sealing end cover is fixedly connected with the stepped collar, the stepped collar and the sealing end cover are both in sliding connection with the driving penetrating column, and contact seals are arranged between the driving penetrating column and the stepped collar and between the driving penetrating column and the sealing end cover, an enlarged ring is fixedly connected to the driving penetrating column, a disc spring is fixedly connected to the outside of the enlarged ring, and the disc spring is fixedly connected in the stepped collar.

[0011] Preferably, the housing comprises an upper mounting housing and a lower mounting housing, the upper mounting housing and the lower mounting housing are fixedly connected with each other, a base table is arranged on the upper mounting housing, the driving motor is mounted on the base table, a first flange is fixedly connected to the left end of the upper mounting housing and the lower mounting housing, a second flange is fixedly connected to the right end of the upper mounting housing and the lower mounting housing, and the first end housing and the second end housing are fixedly connected with the first flange and the second flange respectively.

[0012] Preferably, the upper mounting housing is rotatably connected with a feeding follower plate and a discharging follower plate, and the lower mounting housing is provided with two half-fan-shaped cavities which are matched with the feeding follower plate and the discharging follower plate respectively.

[0013] Preferably, a driving disc is mounted on the output shaft of the driving motor, a force transmission rod is rotatably connected to the bottom end of the driving disc, and the force transmission rod is rotatably connected with the driving penetrating column.

[0014] Preferably, two insertion strip holes are formed in the first end housing and the second end housing respectively, and the four insertion strip holes are matched with two first insertion sleeves and two second insertion sleeves respectively.

[0015] Preferably, a recessed groove is formed in the bottom end of the upper mounting housing, an outwardly extending sealing pipe is fixedly connected to the lower mounting housing, the outwardly extending sealing pipe is matched with the recessed groove, and a contact seal is arranged between the outwardly extending sealing pipe and the driving penetrating column.

[0016] Compared with the prior art, the low-resistance piston pump has the following beneficial effects: (1) In the low-resistance piston pump, the inner suction resistance reduction structure and the outer discharge resistance reduction structure are matched, the liquid can be assisted to be pushed into the housing when the piston body draws the liquid, the liquid can be assisted to be pushed out of the housing when the piston body discharges the liquid, the driving effect of the piston body on the liquid is decomposed, and the running resistance of the piston body is reduced.

[0017] (2) In the application, through the design of the composite linkage structure, the internal suction drag reduction structure and the external exhaust drag reduction structure can form synchronous operation accompanying the operation of the piston body, and finally the internal suction drag reduction structure and the external exhaust drag reduction structure can form synchronous linkage movement with the piston body, ensuring the operation coupling of the piston body, the internal suction drag reduction structure and the external exhaust drag reduction structure.

[0018] (3) In the application, through the design of the buffer assembly, the connecting structure between the piston body and the driving penetrating column is formed, and the movement of the piston body can form buffering, so as to avoid that the piston body bears excessive impact load and improve the service life of the piston body. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the application; Figure 2 It is a schematic diagram of the three-dimensional structure of the cooperation of the first covering cylinder, the second covering cylinder and the hinged frame; Figure 3 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 4 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 5 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 4 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 6 Figure 4 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 7 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 8 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 7 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 9 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 10 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 11 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 12 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell; Figure 13 It is a schematic diagram of the three-dimensional structure of the cooperation of the first end shell, the second end shell and the upper mounting shell;​Figure 14 It is a schematic diagram of the three-dimensional structure of the driving sleeve, the first insert block and the second insert block of the present invention.

[0020] Figure: 1, driving motor; 2, driving through column; 3, piston body; 4, first end shell; 5, second end shell; 6, inner support frame; 7, rotating shaft; 8, rotating sleeve; 9, one-way ratchet; 10, elastic spring; 11, one-way ratchet; 12, cutting blade; 13, synchronous push frame; 14, transmission bar; 15, driving sleeve; 16, first insert block; 17, second insert block; 18, first sleeve; 19, second sleeve; 20, first covering cylinder ; 21. Second covering tube; 22. Articulated frame; 23. Stepped collar; 24. Sealing end cover; 25. Enlarging ring; 26. Disc spring; 27. Upper mounting shell; 28. Lower mounting shell; 29. ​​Base platform; 30. First flange; 31. Second flange; 32. Feed follower plate; 33. Discharge follower plate; 34. Semi-fan-shaped cavity; 35. Drive disk; 36. Force transmission rod; 37. Insert strip hole; 38. Recessed groove; 39. Extended sealing tube. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] For examples, see Figures 1-14The utility model provides a low resistance piston pump, including casing and drive motor 1, still include internal suction resistance reduction structure and outer row resistance reduction structure, drive motor 1 is installed on the casing, drive through the column 2 and piston body 3 are installed in the casing, drive motor 1 is used to drive the drive of drive through the column 2, piston body 3 is installed on drive through the column 2 through buffer assembly, and buffer assembly includes stepped collar 23 and sealing end cover 24, and the middle hole is seted up on piston body 3, stepped collar 23 is fixedly connected in the middle hole, and sealing end cover 24 is fixedly connected with stepped collar 23, and stepped collar 23 and sealing end cover 24 are all with drive through the sliding connection of column 2, and drive through the column 2 with stepped collar 23 between and drive through the column 2 with sealing end cover 24 between all are provided with contact seal, and drive through the column 2 is fixedly connected with expansion ring 25, and expansion ring 25 is fixedly connected with disc spring 26 outside, and disc spring 26 is fixedly connected in stepped collar 23, through the design of buffer assembly, the connecting structure between piston body 3 and drive through the column 2 is formed in matched, and can form the buffer of the movement of piston body 3 in matched, avoid that piston body 3 bears excessive impact load, improve the service life of piston body 3, and internal suction resistance reduction structure and outer row resistance reduction structure include first end shell 4 and second end shell 5 respectively, and first end shell 4 and second end shell 5 are all connected with casing, and the fixedly connected with the inner support frame 6 in first end shell 4 and second end shell 5, and the inner push auxiliary impeller and outer row auxiliary impeller are installed on two inner support frames 6 respectively, and the inner push auxiliary impeller and outer row auxiliary impeller all include rotating shaft 7 and rotating sleeve 8, and two rotating shafts 7 are rotatably connected with two inner support frames 6 respectively, and two rotating shafts 7 are rotatably connected with two rotating sleeves 8 respectively, and the one-way ratchet 9 is rotatably connected on two rotating shafts 7, and two one-way ratchets 9 are connected with elastic spring 10, and two elastic springs 10 are connected with two rotating shafts 7 respectively, and the one-way ratchet wheel 11 is fixedly connected in two rotating sleeves 8, and two one-way ratchets 9 are matched with two one-way ratchet wheels 11 respectively, and a plurality of cut-in sector 12 are fixedly connected on two rotating sleeves 8, through the matching of internal suction resistance reduction structure and outer row resistance reduction structure, can form the auxiliary push delivery of liquid to the casing with the extraction of piston body 3 to liquid, also can form the auxiliary push delivery of liquid to the casing outside with the pressurization outer row of piston body 3 to liquid, in turn reach the drive effect of decomposition of piston body 3 to liquid, reduce the running resistance of piston body 3.

[0023] It also needs to be further explained that the driving through column 2 is connected with a composite linkage structure, which is used for linkage driving of the inner suction auxiliary impeller and the outer discharge auxiliary impeller. The composite linkage structure comprises a synchronous push frame 13 fixedly connected with the driving through column 2. The synchronous push frame 13 is connected with two transmission bars 14. The two transmission bars 14 are both connected with a driving sleeve 15. The two driving sleeves 15 are respectively threadedly connected with two rotating shafts 7. The two driving sleeves 15 are both fixedly connected with a first insertion block 16 and a second insertion block 17. The two first insertion blocks 16 are both matched with a first insertion sleeve 18. The two second insertion blocks 17 are both matched with a second insertion sleeve 19. The two first insertion sleeves 18 are both fixedly connected with a first cladding cylinder 20. The two second insertion sleeves 19 are both fixedly connected with a second cladding cylinder 21. The two first cladding cylinders 20 are respectively fixedly connected with the two second cladding cylinders 21. The two second cladding cylinders 21 are both fixedly connected with a hinged frame 22. The two hinged frames 22 are respectively rotationally connected with the two transmission bars 14. Through the design of the composite linkage structure, the inner suction resistance reduction structure and the outer discharge resistance reduction structure can be synchronized with the operation of the piston body 3. Finally, the inner suction resistance reduction structure and the outer discharge resistance reduction structure are matched with the piston body 3 to form a synchronous linkage movement, ensuring the operation coupling of the piston body 3, the inner suction resistance reduction structure and the outer discharge resistance reduction structure. The shell comprises an upper mounting shell 27 and a lower mounting shell 28. The upper mounting shell 27 and the lower mounting shell 28 are fixedly connected with each other. The upper mounting shell 27 and the lower mounting shell 28 are provided with a contact seal therebetween. The upper mounting shell 27 is provided with a base table 29. The driving motor 1 is mounted on the base table 29. The left end of the upper mounting shell 27 and the lower mounting shell 28 is fixedly connected with a first flange 30. The right end of the upper mounting shell 27 and the lower mounting shell 28 is fixedly connected with a second flange 31. The first end shell 4 and the second end shell 5 are respectively fixedly connected with the first flange 30 and the second flange 31. The upper mounting shell 27 is rotationally connected with an inlet follower plate 32 and a discharge follower plate 33. The lower mounting shell 28 is provided with two half-fan-shaped cavities 34. The two half-fan-shaped cavities 34 are respectively matched with the inlet follower plate 32 and the discharge follower plate 33. The first end shell 4 and the second end shell 5 are both provided with two insertion bar holes 37. The four insertion bar holes 37 are respectively matched with the two first insertion sleeves 18 and the two second insertion sleeves 19. The bottom end of the upper mounting shell 27 is provided with a recessed groove 38. The lower mounting shell 28 is fixedly connected with an outwardly extending sealing pipe 39. The outwardly extending sealing pipe 39 is matched with the recessed groove 38. The outwardly extending sealing pipe 39 and the recessed groove 38 are also provided with a contact seal therebetween. The outwardly extending sealing pipe 39 and the driving through column 2 are provided with a contact seal therebetween.

[0024] The driving motor 1 in the embodiment is a conventional device known to those skilled in the art, which is purchased on the market. In the present application, we only use it, and do not improve its structure and function. Its setting mode, installation mode and electrical connection mode can be debugged according to the requirements of its instruction manual, and will not be described here.

[0025] In summary, the working principle of the low-resistance piston pump is as follows. In use, first, the low-resistance piston pump is connected with the liquid conveying pipeline to form a communication installation. During the installation process, attention should be paid to control the overall low-resistance piston pump to be in a vertical upward posture of the driving motor 1. In this state, the feeding follower plate 32 and the discharge follower plate 33 will be in a vertical state due to their own gravity without being pushed by the liquid pressure. In the vertical state, the feeding follower plate 32 and the discharge follower plate 33 will be respectively sealed in the two half-fan-shaped cavities 34 to cut off the liquid passage between the upper installation shell 27 and the lower installation shell 28. When the isolated space formed by the piston body 3, the upper installation shell 27, the lower installation shell 28, the feeding follower plate 32 and the discharge follower plate 33 increases, the liquid pressure difference will be formed on both sides of the feeding follower plate 32. Under the action of the pressure difference, the liquid outside will have a tendency to flow into the isolated space, so that the feeding follower plate 32 is rotated and lifted to form a flow channel for the liquid outside to flow into the isolated space. During this process, the discharge follower plate 33 cannot be rotated and lifted in the direction of the closed space, so the discharge follower plate 33 will remain in a vertical sealing posture. When the isolated space stops increasing, the liquid outside will not have a tendency to enter the isolated space, and the feeding follower plate 32 will rotate and fall under the action of its own gravity. The feeding follower plate 32 that rotates and falls will reseal the passage between the upper installation shell 27 and the lower installation shell 28. When the isolated space gradually decreases, the pressure difference on both sides of the discharge follower plate 33 will make the discharge follower plate 33 rotate and lift away from the isolated space, so as to facilitate the discharge of the liquid in the isolated space. Correspondingly, the feeding follower plate 32 cannot rotate and discharge relative to the isolated space, so the feeding follower plate 32 can keep the flow passage between the upper installation shell 27 and the lower installation shell 28 sealed.

[0026] During actual operation, the control power supply of the drive motor 1 is turned on, and the operation of the drive motor 1 can realize the rotation drive of the drive disk 35, and the rotation of the drive disk 35 realizes the movement of the force transmission rod 36. The movement of the force transmission rod 36 will drive the drive through column 2 to form a movement between the upper mounting shell 27 and the lower mounting shell 28. Since the moving drive through column 2 will drive the expansion ring 25 and the synchronous push frame 13 to move at the same time, and the moving expansion ring 25 will drive the piston body 3 to form a movement through the disc spring 26, and finally the piston body 3 is formed to move between the upper mounting shell 27 and the lower mounting shell 28, thereby achieving the adjustment of the space size of the isolation space. Due to the setting of the disc spring 26, the piston body 3 and the expansion ring 25 have the feasibility of relative displacement movement, thereby reducing the influence of the impact force during the two-way reciprocating motion of the piston body 3, and the moving synchronous push frame 13 will drive the two transmission bars 14 to move, and the movement of the two transmission bars 14 can respectively drive the two articulated frames 22 to move. The movement of the two articulated frames 22 drives the two second covering cylinders 21 to move respectively, and the movement of the two second covering cylinders 21 drives the two first covering cylinders 20 to move respectively. The synchronous movement of the mutually connected first covering cylinder 20 and the second covering cylinder 21 will drive the driving sleeve 15 therebetween to move. Since the rotating shaft 7 connected by the internal threads of the two driving sleeves 15 is respectively rotatably connected to the two inner support frames 6, the rotating shaft 7 will be rotated in the process of the two driving sleeves 15 forming movement relative to the two inner support frames 6, and the rotation of the rotating shaft 7 will also cause the one-way ratchet 9 to move. When the moving one-way ratchet 9 and its matching one-way ratchet 11 form a motion drive, the corresponding rotating sleeve 8 can be formed to be rotationally driven. When the rotation direction of the moving one-way ratchet 9 is opposite to the drivable direction of the one-way ratchet 11 matched with it, the one-way ratchet 9 cannot drive the one-way ratchet 11 to form movement. At this time, the rotating shaft 7 will form relative rotation relative to the rotating sleeve 8 rotatably connected thereto.

[0027] Attach Figure 4 The directions in the figure are examples. The direction of the synchronous push frame 13 is the front side, and the corresponding directions of the first end shell 4 and the second end shell 5 are the left and right sides respectively. When the piston body 3 moves to the rear side to increase the isolation space, the synchronous push frame 13 will move to the side direction synchronously, and the two drive sleeves 15 will move away from each other. When the two drive sleeves 15 move away from each other to the extreme position, they enter the attached Figure 4In the shown state, the process is to suck the outside liquid into the isolated space, and when the piston body 3 moves to the front side, the space of the isolated space is reduced, and the process is to discharge the liquid in the isolated space. In actual operation, when the isolated space is increased, the rotation of the rotating shaft 7 close to the left side can drive the synchronous rotation of the rotating sleeve 8 on it, and the rotation of the driving sleeve 15 close to the left side can drive the auxiliary right push of the liquid in the first end shell 4 through the multiple cutting vanes 12 on it, so that the liquid in the first end shell 4 has the tendency to move to the isolated space. The rotation of the rotating shaft 7 on the right side cannot drive the synchronous rotation of the rotating sleeve 8 on it, so the liquid in the second end shell 5 does not have the effect of auxiliary flow driving. Since the liquid in the first end shell 4 has the tendency to flow into the isolated space, it can share the stress of the piston body 3 and ensure the opening effect of the feeding follower plate 32, thereby achieving the purpose of reducing resistance. In the process of moving away from each other of the two rotating sleeves 8, the rotation of the rotating shaft 7 on the left side cannot drive the rotation of the rotating sleeve 8 on it, so the auxiliary flow driving effect of the liquid in the first end shell 4 is invalid. The rotation of the rotating shaft 7 on the right side can drive the rotation of the rotating sleeve 8 on it, and the rotation of the rotating sleeve 8 on the right side can drive the liquid in the second end shell 5 to flow away from the isolated space through the movement of the cutting vanes 12 on it, so as to share the extrusion force of the piston body 3 on the liquid and ensure the opening of the discharge follower plate 33. The piston body 3 can alleviate the reverse extrusion force when the auxiliary discharge of the liquid in the isolated space is affected, thereby reducing the resistance of the piston body 3 in the repeated movement process and improving the service life of the piston body 3.

[0028] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A low-resistance piston pump, comprising a housing and a drive motor, characterized in that: It also includes an internal suction drag reduction structure and an external discharge drag reduction structure, the driving motor is installed on the shell, and a driving through column and a piston body are installed in the shell, the driving motor is used to drive the driving through column, and the piston body is installed on the driving through column through a buffer assembly, the internal suction drag reduction structure and the external discharge drag reduction structure respectively include a first end shell and a second end shell, the first end shell and the second end shell are both connected to the shell, and the first end shell and the second end shell are fixedly connected with an internal support frame, the two internal support frames are respectively installed with an internal push auxiliary impeller and an external discharge auxiliary impeller, and the driving through column is connected to a composite linkage structure, and the composite linkage structure is used for the linkage drive of the internal push auxiliary impeller and the external discharge auxiliary impeller.

2. A low-resistance piston pump according to claim 1, characterized in that: The inner push auxiliary impeller and the outer discharge auxiliary impeller both include a rotating shaft and a rotating sleeve. The two rotating shafts are respectively rotatably connected to the two inner support frames, and the two rotating shafts are respectively rotatably connected to the two rotating sleeves. The two rotating shafts are rotatably connected with a one-way ratchet, and the two one-way ratchets are respectively connected to an elastic spring. The two elastic springs are respectively connected to the two rotating shafts. One-way ratchets are fixedly connected in the two rotating sleeves, and the two one-way ratchets are respectively matched with the two one-way ratchets. A plurality of cutting-in fan blades are fixedly connected to the two rotating sleeves.

3. A low-resistance piston pump according to claim 2, characterized in that: The composite linkage structure includes a synchronous push frame, which is fixedly connected to the driving through column. The synchronous push frame is connected to two transmission bars, and the two transmission bars are both connected to a driving sleeve. The two driving sleeves are respectively threadedly connected to the two rotating shafts.

4. A low-resistance piston pump according to claim 3, characterized in that: The two driving sleeves are fixedly connected to the outside with a first insertion block and a second insertion block, the two first insertion blocks are equipped with a first socket, the two second insertion blocks are equipped with a second socket, the two first sockets are fixedly connected to the outside with a first covering tube, the two second sockets are fixedly connected to the outside with a second covering tube, the two first covering tubes are respectively fixedly connected to the two second covering tubes, the two second covering tubes are fixedly connected to a hinged frame, and the two hinged frames are respectively rotatably connected to the two transmission bars.

5. A low-resistance piston pump according to claim 4, characterized in that: The buffer assembly includes a stepped collar and a sealing end cover. An intermediate hole is provided on the piston body. The stepped collar is fixedly connected in the intermediate hole. The sealing end cover is fixedly connected to the stepped collar. Both the stepped collar and the sealing end cover are slidably connected to the driving through column. Contact seals are provided between the driving through column and the stepped collar and between the driving through column and the sealing end cover. An expansion ring is fixedly connected to the driving through column. A disc spring is fixedly connected to the outside of the expansion ring. The disc spring is fixedly connected in the stepped collar.

6. A low-resistance piston pump according to claim 5, characterized in that: The shell includes an upper mounting shell and a lower mounting shell, the upper mounting shell and the lower mounting shell are fixedly connected to each other, a base platform is provided on the upper mounting shell, the drive motor is installed on the base platform, the left ends of the upper mounting shell and the lower mounting shell are fixedly connected with a first flange, the right ends of the upper mounting shell and the lower mounting shell are fixedly connected with a second flange, and the first end shell and the second end shell are fixedly connected to the first flange and the second flange respectively.

7. A low-resistance piston pump according to claim 6, characterized in that: A feed follower plate and a discharge follower plate are rotatably connected in the upper mounting shell, and the lower mounting shell is provided with two semi-fan-shaped cavities, which are matched with the feed follower plate and the discharge follower plate respectively.

8. The low-resistance piston pump according to claim 7, characterized in that: A driving disc is mounted on the output shaft of the driving motor. The bottom end of the driving disc is rotatably connected to a force transmission rod, and the force transmission rod is rotatably connected to the driving through column.

9. The low-resistance piston pump according to claim 8, characterized in that: Two insertion holes are respectively formed on the first end shell and the second end shell. The four insertion holes are matched with the two first sockets and the two second sockets.

10. The low-resistance piston pump according to claim 9, characterized in that: A recessed groove is provided at the bottom end of the upper mounting shell, an extended sealing tube is fixedly connected to the lower mounting shell, the extended sealing tube matches the recessed groove, and a contact seal is provided between the extended sealing tube and the driving through column.

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