A low-pulse steady-flow reciprocating pump

Abstract

This invention relates to the field of reciprocating pump technology, specifically to a low-pulse steady-flow reciprocating pump. The reciprocating pump includes a pump body, a gearbox, and a pump head, with the gearbox and pump head respectively located at both ends of the pump body. The reciprocating pump includes a cylindrical cam reciprocating mechanism and a protection mechanism. The cylindrical cam reciprocating mechanism reduces the pulsation of the reciprocating pump, achieving uniform and stable flow delivery. The protection mechanism works in conjunction with the cylindrical cam reciprocating mechanism to cool the pump body. This invention utilizes a differential mechanism in conjunction with the cylindrical cam reciprocating mechanism. The specially designed cylindrical cam in the cylindrical cam reciprocating mechanism reduces the pulsation of the reciprocating pump, achieving uniform and stable flow delivery. Furthermore, the structure is simple and compact, occupying little space. The rotational connection between the limiting roller and the slide bar allows the limiting roller to roll along the cylindrical cam during reciprocating motion, reducing the friction between the cylindrical cam and the limiting roller, thereby reducing wear and extending their service life.

Description

Technical Field

[0001] This invention relates to the field of reciprocating pump technology, and more particularly to a low-pulse steady-flow reciprocating pump. Background Technology

[0002] The working principle of a traditional reciprocating pump is that the motor transmits power to the crankshaft after being reduced in speed by a reducer. The eccentricity at the crank of the crankshaft is determined by the design requirements. The crankshaft transmits power to the crosshead through the connecting rod. The crosshead drives the slide rod to achieve reciprocating motion. The reciprocating motion creates a negative pressure at the pump head to draw in the medium. In conjunction with the one-way valve at the pump head, the medium is pumped out of the pump head, thereby realizing the delivery of the medium. The plunger or piston, driven by the prime mover, reciprocates once, completing one suction process and one discharge process, which is called one working cycle.

[0003] The reciprocating motion formed by the crankshaft and connecting rod structure used in traditional reciprocating pumps is not linear and smooth enough. The process of liquid intake and discharge in traditional reciprocating pumps is discontinuous, and the piston performs variable-speed linear motion, resulting in uneven instantaneous flow and pulsating discharge pressure. The pump is prone to shock and vibration during operation. In particular, when the frequency of discharge pressure change is equal to or an integer multiple of the natural frequency of the discharge pipeline, resonance will occur, which will greatly reduce the service life of the reciprocating pump.

[0004] To address this, a low-pulse steady-flow reciprocating pump is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a low-pulse steady-flow reciprocating pump to solve the problem mentioned in the background art that the crankshaft connecting rod structure of the reciprocating pump is not stable enough and is prone to resonance, which affects its service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a low-pulse steady-flow reciprocating pump, the reciprocating pump comprising a pump body, a gearbox, and a pump head, the gearbox and the pump head being respectively disposed at both ends of the pump body, the reciprocating pump comprising a cylindrical cam reciprocating mechanism and a protection mechanism, the cylindrical cam reciprocating mechanism being used to reduce the pulsation of the reciprocating pump and achieve uniform and stable flow delivery, the protection mechanism cooperating with the cylindrical cam reciprocating mechanism to cool the inside of the pump body, the protection mechanism also comprising an air distribution mechanism and an air supply mechanism, the air supply mechanism being able to follow the cylindrical cam reciprocating mechanism to continuously supply air force to the air distribution mechanism, the air distribution mechanism being used to distribute air force to enhance the cooling effect.

[0007] Preferably, the cylindrical cam reciprocating mechanism includes a main shaft rotatably connected inside the pump body, a cylindrical cam sleeved on the outside of the main shaft, and limiting rollers provided on both sides of the cylindrical cam, with two sets of limiting rollers arranged on the slide rod.

[0008] Preferably, two sets of limiting rollers are rotatably connected to the slide bar, and the two sets of limiting rollers roll along the two sides of the cylindrical cam respectively.

[0009] Preferably, a differential mechanism is provided at one end of the main shaft. The differential mechanism includes a motor located at the upper end of the gearbox. The output shaft of the motor passes through the gearbox and is fixedly connected to a worm gear. The worm gear meshes with a worm wheel sleeved on the main shaft.

[0010] Preferably, the air distribution mechanism includes an air box located at the bottom of the pump body, an air distribution plate installed at the upper end of the air box, and the air distribution plate located at the bottom of the cylindrical cam.

[0011] Preferably, the upper end of the air distribution plate is provided with air outlets evenly spaced, and the exhaust on both sides of the air outlets is inclined inward.

[0012] Preferably, the bellows contains a heater arranged in a serpentine pattern.

[0013] Preferably, the air supply mechanism includes a vertical plate disposed at the bottom of the pump body, one end of a telescopic airbag is fixedly installed on the side of the vertical plate, the other end of the telescopic airbag is fixedly installed on a movable plate, and the movable plate is sleeved on a slide rod.

[0014] Preferably, one end of the telescopic airbag is connected to an air supply pipe, the other end of the air supply pipe is connected to a bellows, and an air inlet pipe is provided on the telescopic airbag.

[0015] Preferably, the diameter of the air supply pipe is equal to the diameter of the air inlet pipe, and both the air supply pipe and the air inlet pipe are equipped with one-way valves.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention utilizes a differential mechanism in conjunction with a cylindrical cam reciprocating mechanism. The specially designed cylindrical cam in the reciprocating mechanism reduces the pulsation of the reciprocating pump, achieving uniform and stable flow delivery. Furthermore, the structure is simple and compact, occupying little space. The rotational connection between the limiting roller and the slide bar reduces the friction between the cylindrical cam and the limiting roller, thereby reducing wear and extending their service life. The differential mechanism facilitates control of the piston's movement speed on the slide bar to adapt to high-pressure and high-flow conditions, further reducing wear and extending the service life of the reciprocating pump.

[0018] 2. This invention, through the design of an air distribution mechanism and an air supply mechanism in conjunction with a cylindrical cam reciprocating mechanism, facilitates the continuous supply of air to the air box of the air distribution mechanism using the power of the cylindrical cam reciprocating mechanism. This allows the air box to dissipate heat from the cylindrical cam and the limiting roller. Furthermore, by utilizing the staggered displacement of two sets of slide rods, the two sets of air supply mechanisms can stagger the air supply to the air box, achieving uninterrupted gas delivery. By setting inwardly inclined air outlets on both sides of the air distribution plate, the gas inside the air box can be more concentrated and blown onto the cylindrical cam and the limiting roller. In addition, the heater can use the air outlets on the air distribution plate to accelerate the defrosting of the lubricating oil between the cylindrical cam and the limiting roller. The air supply mechanism will deliver the heated gas generated by the heater inside the air box more quickly, further accelerating the defrosting of the lubricating oil. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional schematic diagram of a low-pulse steady-flow reciprocating pump according to an embodiment of the present invention;

[0021] Figure 2 This invention relates to a low-pulse steady-flow reciprocating pump. Figure 1 Schematic diagram of cross-section at point AA;

[0022] Figure 3 This is a three-dimensional schematic diagram of a low-pulse steady-flow reciprocating pump according to an embodiment of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of a cylindrical cam reciprocating mechanism for a low-pulse steady-flow reciprocating pump according to an embodiment of the present invention;

[0024] Figure 5 This is a three-dimensional schematic diagram of a protection mechanism for a low-pulse steady-flow reciprocating pump according to an embodiment of the present invention;

[0025] Figure 6 This is an exploded perspective view of a protection mechanism for a low-pulse steady-flow reciprocating pump according to an embodiment of the present invention.

[0026] Figure 7 This invention relates to a low-pulse steady-flow reciprocating pump. Figure 5 Schematic diagram of cross-section at point BB;

[0027] Figure 8 This invention relates to a low-pulse steady-flow reciprocating pump. Figure 5 Schematic diagram of cross-section at CC.

[0028] The components in the diagram are labeled as follows: 1. Pump body; 2. Gearbox; 3. Pump head; 4. Motor; 5. Worm gear; 6. Worm wheel; 7. Main shaft; 8. Check valve; 9. Cylindrical cam; 10. Slide bar; 11. Limiting roller; 12. Air box; 13. Air distribution plate; 14. Air outlet; 15. Heater; 16. Vertical plate; 17. Telescopic airbag; 18. Movable plate; 19. Air supply pipe; 20. Air inlet pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0030] It should be noted that, unless otherwise defined, the technical or scientific terms used in this invention should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] Please see Figures 1 to 8 This invention provides a technical solution: a low-pulse steady-flow reciprocating pump. The reciprocating pump includes a pump body 1, a reduction gearbox 2, and a pump head 3. The reduction gearbox 2 and the pump head 3 are respectively disposed at both ends of the pump body 1. The reciprocating pump includes a cylindrical cam reciprocating mechanism and a protection mechanism. The cylindrical cam reciprocating mechanism is used to reduce the pulsation of the reciprocating pump and achieve uniform and stable flow delivery. The protection mechanism works with the cylindrical cam reciprocating mechanism to cool the inside of the pump body 1. The protection mechanism also includes an air distribution mechanism and an air supply mechanism. The air supply mechanism can follow the cylindrical cam reciprocating mechanism to continuously supply air to the air distribution mechanism. The air distribution mechanism is used to distribute air to enhance the cooling effect. The cylindrical cam reciprocating mechanism includes a main shaft 7 rotatably connected inside the pump body 1. A cylindrical cam 9 is sleeved on the outside of the main shaft 7. Limiting rollers 11 are provided on both sides of the cylindrical cam 9. The two sets of limiting rollers 11 are disposed on a slide rod 10. Figure 3 and Figure 4As shown, specifically, the reciprocating motion formed by the crankshaft connecting rod structure of traditional reciprocating pumps is not linear and smooth enough. The process of liquid intake and discharge in traditional reciprocating pumps is discontinuous, which is prone to resonance and affects service life. A cylindrical cam 9 is designed on the main shaft 7. The uniquely designed cylindrical cam 9 drives two sets of slide rods 10 to reciprocate in an alternating manner through the limiting roller 11. The reciprocating motion creates a negative pressure at the pump head 3 to draw in the medium. In conjunction with the pump head check valve, the medium is pumped out of the pump head, thereby realizing the delivery of the medium. The piston inside the pump head 3 reciprocates once under the drive of the power, completing one intake process and one discharge process, which is a working cycle. Moreover, the pump head 3 can be designed according to requirements, with many common parts. Only the wear parts, such as diaphragms and packing, need to be replaced, which is highly compatible. The specially designed cylindrical cam 9 in the cylindrical cam reciprocating mechanism can reduce the pulsation of the reciprocating pump and achieve uniform and stable flow delivery. The structure is simple and compact, occupying little space. The two sets of limiting rollers 11 are rotatably connected to the slide rods 10. 1. Rolling along both sides of the cylindrical cam 9 respectively. Specifically, the cylindrical cam 9 drives the limiting roller 11 to reciprocate, which has a large frictional force. Through the rotational connection between the limiting roller 11 and the slide rod 10, when the cylindrical cam 9 drives the limiting roller 11 to reciprocate, the limiting roller 11 rolls along the cylindrical cam 9, which can reduce the frictional force between the cylindrical cam 9 and the limiting roller 11, thereby reducing the wear of the cylindrical cam 9 and the limiting roller 11 and improving their service life. One end of the main shaft 7 is provided with a differential mechanism, which includes a motor 4 set at the upper end of the reduction gearbox 2. The output shaft of the motor 4 passes through the reduction gearbox 2 and is fixedly connected to a worm gear 5. The worm gear 5 meshes with a worm wheel 6 sleeved on the main shaft 7. Because when the piston of the reciprocating pump moves too fast, the piston and valves inside the pump will bear greater impact and friction, thereby accelerating the wear and aging of the components. In addition, the excessive speed will cause large fluctuations in the pump's delivery pressure, affecting the pump's performance and stability. Figure 3 As shown, motor 4 drives worm 5 to rotate at high speed. Worm 5 drives main shaft 7 to rotate through worm wheel 6 to reduce speed, realizing differential rotation of main shaft 7. This is beneficial for controlling the movement speed of piston on slide bar 10 to adapt to high pressure and high flow conditions, and helps to reduce wear of reciprocating pump and extend its service life.

[0032] As one embodiment of the present invention, such as Figure 3 and Figure 5 as well as Figure 6As shown, during the operation of the cylindrical cam reciprocating mechanism using cylindrical cam transmission, frictional resistance exists between movements such as friction and meshing, generating heat. If this heat is not dissipated in time, it will cause the mechanism to overheat, affecting its normal operation, and in severe cases, even burning out the mechanism. The air distribution mechanism includes an air box 12 located at the bottom of the pump body 1, and an air distribution plate 13 installed at the upper end of the air box 12. The air distribution plate 13 is located at the bottom of the cylindrical cam 9, and air outlet holes 14 are evenly opened at the upper end of the air distribution plate 13. The exhaust on both sides of the air outlet holes 14 is inclined inward. The gas in the air box 12 dissipates heat from the cylindrical cam 9 and the limiting roller 11 through the air distribution plate 13. Furthermore, the air distribution plate 13 is provided with air outlet holes 14 inclined inward on both sides to facilitate the dissipation of heat. The air inside the bellows 12 is directed more concentratedly onto the cylindrical cam 9 and the limiting roller 11. This is because the lubricating oil between the meshing parts is prone to freezing in winter, and sudden movement will increase the wear of the parts. The bellows 12 is equipped with a heater 15, which is arranged in a serpentine pattern. When the heater 15 is turned on, the air outlet 14 on the air distribution plate 13 effectively accelerates the thawing of the lubricating oil between the cylindrical cam 9 and the limiting roller 11. Then, as the reciprocating pump works, the air inside the bellows 12 will send out the heat generated by the heater 15 more quickly, further accelerating the thawing of the lubricating oil. Finally, the heater 15 is turned on briefly and then turned off, so as not to affect the heat dissipation effect of the bellows 12 when the cylindrical cam 9 and the limiting roller 11 are at high temperatures.

[0033] Furthermore, in some embodiments of the present invention, as preferred, such as Figure 5 and Figure 7 as well as Figure 8As shown, continuous cooling of the cylindrical cam 9 and the limiting roller 11 requires continuous airflow. Using an airbag for air delivery interrupts the airflow output when the airbag inhales. The air delivery mechanism includes a vertical plate 16 at the bottom of the pump body 1. One end of a telescopic airbag 17 is fixedly mounted on the side of the vertical plate 16, and the other end of the telescopic airbag 17 is fixedly mounted on a movable plate 18. The movable plate 18 is sleeved on a slide rod 10. One end of the telescopic airbag 17 is connected to an air delivery pipe 19, and the other end of the air delivery pipe 19 is connected to a bellows 12. An air inlet pipe 20 is provided on the telescopic airbag 17, and the diameter of the air delivery pipe 19 is equal to the diameter of the air inlet pipe 20. Both the air delivery pipe 19 and the air inlet pipe 20 are equipped with one-way valves 8. During use, the slide rod 10 reciprocates to drive... The movable plate 18 reciprocates, and since the position of the upright plate 16 is fixed, the movable plate 18 drives the telescopic airbag 17 to reciprocate and extend. When the telescopic airbag 17 extends, it draws in outside air through the air inlet pipe 20. When the telescopic airbag 17 contracts, it sends the internal air into the air box 12 through the air delivery pipe 19. The one-way valve 8 prevents backflow of gas, which is beneficial to continuously supply air to the air box 12 of the air distribution mechanism by utilizing the power of the cylindrical cam reciprocating mechanism. This facilitates the air box 12 to dissipate heat from the cylindrical cam 9 and the limiting roller 11. Furthermore, the staggered displacement of the two sets of slide rods 10 allows the two sets of air delivery mechanisms to supply air to the air box 12 alternately, achieving uninterrupted gas delivery.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0035] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A low-pulse steady-flow reciprocating pump, the reciprocating pump comprising a pump body (1), a reduction gearbox (2) and a pump head (3), wherein the reduction gearbox (2) and the pump head (3) are respectively disposed at both ends of the pump body (1), characterized in that: The reciprocating pump includes a cylindrical cam reciprocating mechanism and a protection mechanism. The cylindrical cam reciprocating mechanism is used to reduce the pulsation of the reciprocating pump and achieve uniform and stable flow delivery. The protection mechanism works with the cylindrical cam reciprocating mechanism to cool the pump body (1) internally. The protection mechanism also includes a wind distribution mechanism and a wind supply mechanism. The wind supply mechanism can follow the movement of the cylindrical cam reciprocating mechanism to continuously supply wind power to the wind distribution mechanism. The wind distribution mechanism is used to distribute wind power to enhance the cooling effect. The cylindrical cam reciprocating mechanism includes a main shaft (7) rotatably connected inside the pump body (1), a cylindrical cam (9) sleeved on the outside of the main shaft (7), and limiting rollers (11) provided on both sides of the cylindrical cam (9). A differential mechanism is provided at one end of the main shaft (7). The differential mechanism includes a motor (4) located at the upper end of the gearbox (2). The output shaft of the motor (4) passes through the gearbox (2) and is fixedly connected to a worm (5). The worm (5) meshes with a worm wheel (6) sleeved on the main shaft (7). The two sets of limiting rollers (11) are rotatably connected to the slide bar (10), and the two sets of limiting rollers (11) roll along the two sides of the cylindrical cam (9); The air distribution mechanism includes an air box (12) located at the bottom of the pump body (1), an air distribution plate (13) installed at the upper end of the air box (12), and the air distribution plate (13) located at the bottom end of the cylindrical cam (9). The air supply mechanism includes a vertical plate (16) set at the bottom of the pump body (1), one end of a telescopic airbag (17) is fixedly installed on the side of the vertical plate (16), and the other end of the telescopic airbag (17) is fixedly installed on a movable plate (18), which is sleeved on a slide rod (10). The telescopic airbag (17) is connected to one end of an air supply pipe (19), and the other end of the air supply pipe (19) is connected to a bellows (12). An air inlet pipe (20) is provided on the telescopic airbag (17).

2. The low-pulse steady-flow reciprocating pump according to claim 1, characterized in that, The upper end of the air distribution plate (13) is provided with air outlet holes (14).

3. The low-pulse steady-flow reciprocating pump according to claim 1, characterized in that, The air box (12) is equipped with a heater (15) inside, and the heater (15) is arranged in a serpentine shape.

4. The low-pulse steady-flow reciprocating pump according to claim 1, characterized in that, The diameter of the air supply pipe (19) is equal to the diameter of the air inlet pipe (20), and both the air supply pipe (19) and the air inlet pipe (20) are equipped with one-way valves (8).

Images