CN117514684A - Double-acting constant-speed reciprocating pump - Google Patents

Abstract

The invention discloses a double-acting constant-speed reciprocating pump which comprises an inlet pipeline, a constant-speed transmission device, a pump shell, an inflow chamber, an initial flow distribution device, a primary cylindrical one-way valve, a leakage-proof piston, a secondary spherical one-way valve, an outflow chamber, a fluid diversion device, an outflow regulating device and an outlet pipeline which are sequentially arranged from bottom to top. The inlet pipeline guides liquid flow to enter the inflow cavity, the initial flow distribution device distributes a flow channel in the inflow cavity according to the inflow flow, the anti-leakage piston reciprocates under the action of the uniform speed transmission device to change the volume of the left working cavity and the right working cavity, the primary cylindrical one-way valve and the secondary spherical one-way valve are matched to complete the fluid entering and leaving the working cavity, and the fluid diversion device and the outflow adjustment device avoid the impact of the fluid flowing out. The double-acting constant-speed reciprocating pump realizes that the transmission device drives the piston to move left and right at a constant speed, the volumes of the left working cavity and the right working cavity are linearly changed, the energy loss is reduced, and the flow stability and the working efficiency are greatly improved.

Description

Double-acting constant-speed reciprocating pump

Technical Field

The invention relates to the field of reciprocating pumps, in particular to a double-acting constant-speed reciprocating pump.

Background

The double-acting reciprocating pump is a special reciprocating pump, the working principle of the double-acting reciprocating pump is similar to that of a single-acting reciprocating pump, but the reciprocating motion of a piston can lead to liquid suction and liquid discharge twice, the working efficiency is very high, and the double-acting reciprocating pump is widely applied to the fields of chemical industry, petroleum, pharmacy, food and the like. Because the output flow rate of the double-acting reciprocating pump is greatly pulsed due to the limited working mode of the traditional double-acting reciprocating pump, corresponding buffer equipment is also needed to be equipped for the application occasions needing stable flow rate, otherwise, the pump system is damaged, and the normal operation of the system is affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the double-acting constant-speed reciprocating pump, wherein liquid is pumped out in each action of the forward or backward movement of the anti-leakage piston, meanwhile, the direct exchange of the liquid in the left working chamber and the right working chamber is avoided, the flow distribution device is arranged at the initial stage of the installation of the inflow chamber for flow configuration, the liquid is guided to directly enter the one-way valve at low flow, the working efficiency is improved, the fluid diversion device and the outflow regulating device are arranged at the outflow chamber, the outflow direction of the liquid is changed, the turbulence caused by mutual impact is prevented, the outflow state is improved, and the service life of the double-acting reciprocating pump is prolonged.

The present invention achieves the above technical object by the following means.

The double-acting constant-speed reciprocating pump comprises a pump shell, wherein an inner cavity of the pump shell is sequentially divided into an inflow cavity, a working cavity and an outflow cavity by a lower interlayer fixing plate and an upper interlayer fixing plate, the inflow cavity is communicated with an inlet pipeline, the outflow cavity is communicated with an outlet pipeline, a leakage-proof piston is arranged in the working cavity and divides the working cavity into a left working cavity and a right working cavity, the leakage-proof piston is externally connected with a constant-speed transmission device, the leakage-proof piston reciprocates under the action of the constant-speed transmission device, so that the volume sizes of the left working cavity and the right working cavity are changed,

the left working cavity and the right working cavity are respectively communicated with the inflow cavity through a primary cylindrical one-way valve, the left working cavity and the right working cavity are respectively communicated with the outflow cavity through a secondary spherical one-way valve,

an initial flow distribution device is arranged in the inflow cavity, flow distribution is carried out according to the inflow flow, and fluid is guided to directly pass through the primary cylindrical one-way valve when the flow is low, so that the pumping efficiency is improved;

the outflow cavity is internally provided with a fluid diversion device and an outflow adjusting device, and the fluid diversion device and the outflow adjusting device are used for adjusting fluid entering the outflow cavity from the left working cavity and the right working cavity, avoiding the merging and impacting of two fluids, guiding the direction of the fluid flowing to an outlet pipeline and improving the fluid outflow state.

Further, the uniform speed transmission device comprises a transmission device shell, a transmission device cavity, an upper gear shaft, a first upper gear, a second upper gear, a piston transmission rod, first rubber, a driving gear, a lower gear shaft, a first lower gear, a second lower gear, a toothed bar, a motor shaft, wherein the first rubber is arranged at the junction of the transmission device shell, a pump shell and the piston transmission rod, the transmission device cavity is sealed to prevent liquid from entering, the driving gear is arranged on the motor shaft and driven by an external motor to rotate positively, the driving gear is simultaneously meshed with the first upper gear fixed on the upper gear shaft and the first lower gear fixed on the lower gear shaft, the first upper gear and the first lower gear are symmetrically distributed about the axis of the driving gear and rotate in the same direction, the upper gear shaft and the lower gear are reversely rotated in the same direction about the axis of the driving gear, the second upper gear is fixed on the upper gear shaft through a key slot and is reversed along with the upper gear shaft, the second lower gear is fixed on the lower gear shaft through a key slot and is reversed along with the lower gear shaft, the second upper gear and the second lower gear are both half gearless at the left side, the gears are arranged at the right side and symmetrically distributed relative to the two sides of the toothed bar, the toothed bar is simultaneously externally meshed with the second upper gear and the second lower gear, one side of the second lower gear with the number of teeth is meshed with the toothed bar to drive the toothed bar to move leftwards, simultaneously half of the second upper gear is meshed with the toothed bar without influencing the movement of the toothed bar, and after the toothed bar moves to the leftmost side, half of the second lower gear is meshed with the toothed bar, simultaneously half of the second upper gear is meshed with the toothed bar to drive the toothed bar to move rightwards, so as to finish the left-right uniform movement of the toothed bar, the piston transmission bar is fixed at one end of the toothed bar, synchronously moves along with the toothed bar.

Further, the driving gear rotates forward, the first upper gear and the first lower gear are symmetrically arranged about the axis of the toothed bar, the rotation direction is reverse, the second upper gear and the second lower gear are symmetrically arranged about the axis of the driving gear, the rotation direction is reverse, the transmission ratio of the driving gear to the second upper gear is 0.5, the transmission ratio of the driving gear to the second lower gear is 0.5, and the ratio of the unidirectional movement distance of the toothed bar to the meshing rotation distance of half circle teeth of the first upper gear and the first lower gear is 1:1.

Further, the anti-leakage piston is arranged between the lower interlayer fixed plate and the upper interlayer fixed plate, and is provided with a piston shell, a piston inner cavity, a second fixed rod, a third fixed rod, a collection fixed sliding block, a fourth fixed rod, a first spring, an inner groove, a cavity supporting sliding block, a first hinging rod, a second hinging rod, a fifth fixed rod, a round base, a steering spring fixed end, a second fixed end, an anti-collision groove, a sliding base, a piston shell and a piston transmission rod, wherein the piston shell is connected with the piston transmission rod, moves left and right along with the piston transmission rod, changes the sizes of a left working cavity and a right working cavity, forms the piston inner cavity inside the piston shell, the fourth fixed rod is positioned at the central axis of the piston inner cavity, divides the piston inner cavity into an upper symmetrical piston cavity and a lower symmetrical piston cavity, symmetrically installs a plurality of third fixed rods thereon, the collection fixed sliding block is arranged in the middle of the fourth fixed rod, can slide along the fourth fixed rod, one end of the first spring is respectively fixed at four corners, the other end of the first spring is fixed at the fixed end of the steering spring, the fixed end of the steering spring is arranged on the axis of the circular base with the same circle center, the axis of the circle center can be used as a rotation axis for rotation, the circular base is fixed on the sliding base, the sliding base can move up and down along the second fixed rod, one end of the second fixed rod is arranged on the third fixed rod with a groove, the other end of the second fixed rod is connected with the second fixed end with an anti-collision groove, the groove can play a role of buffering impact, meanwhile, the sliding distance of the sliding base is limited, the left side and the right side of the sliding base are symmetrical and horizontally fixed with a fifth fixed rod, one end of the second hinged rod is fixed on the fifth fixed rod, the other end of the second hinged rod is hinged with the first hinged rod, the included angle between the second hinged rod and the first hinged rod can be changed according to the actual motion state, the other end of the first hinged rod is hinged with a cavity supporting sliding block, the cavity supporting sliding block can slide left and right in an inner groove in the piston shell and generate certain pressure on the piston shell.

Further, the piston shell moves left and right in the groove of the lower interlayer fixed plate, the length of the groove is slightly larger than the maximum distance of the left and right movement of the piston shell, four first springs are arranged, the four springs are respectively positioned at four corners of the fixed sliding blocks, four third fixed rods are arranged, two of the four springs are positioned above the fourth fixed rods and symmetrically distributed about the vertical central line of the piston shell, the other two springs are positioned below the fourth fixed rods and symmetrically distributed about the vertical central line of the piston shell, cavity supporting sliding blocks, first hinging rods, second hinging rods and fifth fixing rods which are positioned at two sides of the sliding base are symmetrically distributed, the length of the second fixing rods is smaller than the sum of the lengths of the first hinging rods and the second hinging rods, and the cavity supporting sliding blocks are always in an extruded state;

further, the initial flow distribution device is arranged at the central axis of the inflow chamber, the component part can be divided into an inner part and an outer part, the inner part and the outer part comprise a first fixed end, a first fixed rod, an upper arc plate baffle, an upper arc plate through hole, a lower arc plate fixed groove, a lower arc plate through hole, a lower arc plate baffle, an initial flow regulating spring, an initial flow regulating plate, a first fixed rod upper end and an initial flow regulating plate are arranged on the lower interlayer fixed plate through the first fixed end, the initial flow regulating plate is hinged to the lower end of the first fixed rod, two ends of the initial flow regulating spring are respectively arranged on the initial flow regulating plate and the first fixed rod, an included angle formed by the initial flow regulating plate and the first fixed rod is controlled through the flow size, the upper arc plate baffle and the upper arc plate through hole jointly form an upper frame of the initial flow distribution device, the upper arc plate baffle and the lower arc plate through hole jointly form a bottom frame of the initial flow distribution device, and the lower arc plate baffle are fixed inside a pump shell through the lower arc plate fixed groove.

Further, the ratio of the arc length of the upper arc plate baffle to the arc length of the upper arc plate through hole is 2:1, and the ratio of the arc length of the lower arc plate through hole to the arc length of the lower arc plate baffle is 2:1.

further, the fluid diversion device is fixed at two corners above the inside of the pump shell, two fluid diversion devices are symmetrically arranged on the vertical central line of the pump and comprise a fifth fixed end, a first rotating shaft, side baffles, a spring fixed end, a diversion spring fixed end, a second rotating shaft, a sixth fixed end, an upper baffle, third rubber, a third rubber and a fourth rubber, wherein the fifth fixed end is fixed inside the pump shell, the first rotating shaft is arranged on the fifth fixed end, the side baffles and the upper baffle form a fixed angle, the intersection end is fixed on the first rotating shaft, the third rubber is fixed on one side, close to the pump shell, of the other end of the upper baffle, the diversion spring end is connected to the spring fixed end arranged on the side baffles, the other end is connected to the diversion spring fixed end, the diversion spring fixed end is arranged at the sixth fixed end through the second rotating shaft, and the sixth fixed end is arranged inside the pump shell;

further, the outflow adjusting device is installed in the middle of the upper interlayer fixing plate through a seventh fixing end, and comprises an outflow adjusting plate, outflow adjusting springs, outflow adjusting shafts and fixing adjusting plates, one ends of the outflow adjusting plates are fixed on the outflow adjusting shafts, the outflow adjusting shafts are arranged at the tops of the seventh fixing ends, the fixing adjusting plates are arranged at the seventh fixing ends, two outflow adjusting shafts are symmetrically arranged, the outflow adjusting first spring ends are fixed on the outflow adjusting plates, the other ends of the outflow adjusting first spring ends are fixed on the fixing adjusting plates, and a plurality of outflow adjusting shafts are symmetrically arranged.

Further, the fixed regulating plate is arranged two with the axis symmetry that the adjusting spindle was located, and the adjusting plate that flows is evenly arranged as rotation center circumference with the fixed regulating plate with the adjusting spindle that flows, and adjacent two part angles are 120 degrees, and the adjusting spring that flows every side sets up three, sets up six altogether.

Further, the first-stage cylindrical one-way valve is fixedly penetrated on the lower interlayer fixing plate, and two first-stage cylindrical one-way valves are symmetrically arranged about the vertical central line of the pump and are respectively communicated with the left working cavity and the inflow cavity as well as the right working cavity and the inflow cavity; the primary cylindrical one-way valve consists of a cylinder valve outer shell, a cylinder valve spring, a valve outer through hole, a valve inner through hole, a bearing, a cylinder valve runner and a cylinder valve inner shell, wherein the cylinder valve outer shell penetrates through a fixed lower interlayer fixing plate, the part of the cylinder valve outer shell, which is positioned in an inflow cavity, is provided with the bearing, the part of the cylinder valve outer shell, which is positioned in a working cavity, is provided with the valve outer through hole, the valve outer through hole is communicated with the working cavity, the cylinder valve inner shell is connected on the inner side of the cylinder valve outer shell through the cylinder valve spring and is tightly attached, the wall surface of the cylinder valve inner shell is provided with a valve inner through hole, and the cylinder valve runner is formed by wrapping the cylinder valve inner shell and is communicated with the valve inner through hole;

when the cylinder valve spring is in a natural state, the valve outer through hole and the valve inner through hole are completely closed, the height of the valve outer through hole close to the side of the cylinder valve inner shell and the height of the valve inner through hole are 1:1, and the compressible free range of the cylinder valve spring is slightly larger than the height of the valve outer through hole;

Further, the two-stage ball-shaped check valve is penetrated and fixed on the upper interlayer fixing plate, two are symmetrically arranged about the vertical central line of the pump, the left working cavity and the outflow cavity as well as the right working cavity and the outflow cavity are respectively communicated, and the fluid diversion device and the outflow regulating device are matched to guide fluid to enter the outlet pipeline;

the second-stage spherical check valve comprises a sealing ball rod, second rubber, a sealing plate, a sealing spring, a third hinged end, a sixth fixed rod, a third fixed end, a seventh fixed rod, a separation fixed end, a fourth fixed end, the separation fixed end is vertically fixed on an upper interlayer fixed plate, the third fixed end is horizontally embedded in the upper interlayer fixed plate, one end of the sealing plate is hinged on the third fixed end, the rotating angle of the sealing plate can be limited by the convex design, the second rubber is arranged at the other end, two ends of the sealing spring are respectively fixed on the sealing plate and the separation fixed end, a plurality of sealing springs are arranged together, the third hinged end is installed on the sealing plate and connected with the sixth fixed rod, the rotation of the sixth fixed rod can be limited by a plurality of angles, the other end of the sixth fixed rod is installed on the fourth fixed end, the fourth fixed end is installed on the seventh fixed rod, and the sealing ball rod is arranged at the other end of the seventh fixed rod.

Further, the maximum rotation angle of the sixth fixing rod around the hinged end is perpendicular to the sealing plates, eight sealing springs are arranged, two sealing plates are arranged on each sealing plate, and a fixed included angle of 75 degrees is formed between the side baffle and the upper baffle;

by the technical scheme, the invention has the following beneficial effects:

1. according to the device, the constant-speed transmission device is adopted, the motor shaft is driven by the external motor to drive the driving gear to rotate forwards, the driving gear is meshed with the first upper gear and the first lower gear respectively, so that the first upper gear and the first lower gear are driven to rotate reversely synchronously, the second upper gear and the first upper gear rotate reversely coaxially, the second lower gear and the first lower gear rotate reversely coaxially, when one side of the second lower gear with the gear is meshed with the toothed bar, the non-gear side of the second upper gear is contacted with the toothed bar, the toothed bar moves leftwards at a constant speed, the volumes of the left working cavity and the right working cavity are linearly changed, the fluid flow is pumped out uniformly, liquid impact caused by pressure pulsation can be effectively prevented, the damage to the internal structure of the pump is avoided, meanwhile, the flow parameters are controlled more accurately, and the reliability of a pump system is improved;

2. according to the pump system, the primary cylindrical one-way valve and the secondary spherical one-way valve are used as a channel switch for pumping in the next stage, so that liquid backflow can be effectively prevented, oscillation or pressure pulsation in the system is reduced, and stability and working efficiency of the pump system are maintained;

3. According to the method, the fluid flowing state is improved through the initial flow distribution device, the fluid diversion device and the outflow regulating device, when the initial flow distribution device is smaller in flow, liquid is led to directly pass through a cylinder valve flow channel of the primary cylinder-shaped one-way valve along a space formed by the lower frame and the initial diversion plate, the working efficiency of the pump is greatly improved, when the flow is larger, the initial diversion plate is impacted, part of liquid flows into the inflow cavity from the upper arc plate through hole, the liquid stored in the inflow cavity can enter the initial flow distribution device again through the lower arc plate through hole, flow configuration is realized, the fluid diversion device and the outflow regulating device are matched, the flowing direction of the fluid in the outflow cavity is regulated, collision of left and right two fluids is avoided, and the flowing stability is improved;

4. the utility model discloses a leak-proof piston four sides is closely gone up interlayer fixed plate, is gone up interlayer fixed plate and pump's pump case inside, when the rack bar direction of movement changes, leak-proof piston inside props the chamber slider and produces the effect to the piston casing is inside all the time, avoids controlling liquid in the working chamber and reveal each other, effectively maintains the pressure in the working chamber about simultaneously, guarantees the high-efficient operation of pump.

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a front cross-sectional view of a double-acting constant velocity reciprocating pump of the present invention;

FIG. 2 is an enlarged view of the structure of the constant speed transmission;

FIG. 3 is a side view of the constant velocity drive configuration;

FIG. 4 is an enlarged view of the leak-proof piston structure;

FIG. 5 is an enlarged view of a partial structure of the leakage preventing piston;

FIG. 6 is an enlarged view of the structure of the initial flow distribution device;

FIG. 7 is an enlarged view of the structure of the one-stage cylinder-shaped check valve;

FIG. 8 is an enlarged view of the fluid diversion apparatus;

FIG. 9 is an enlarged view of the outflow adjusting device;

fig. 10 is an enlarged view of the structure of the two-stage ball check valve.

Reference numerals of the above drawings: 1. an inlet line;

2. a constant speed transmission device; 21. a transmission housing; 22. a transmission chamber; 23. an upper gear shaft; 24 a second upper gear; 25. a first upper gear; 26. a piston drive rod; 27. a first rubber; 28. a drive gear; 29. a lower gear shaft; 210. a second lower gear; 211. a first lower gear; 212. a toothed bar; 213. a motor shaft;

3. a pump housing;

4. an inflow chamber;

5. an initial flow distribution device; 51. a first fixed end; 52. a first fixing rod; 53. an upper arc plate baffle; 54. an upper arc plate through hole; 55. a lower arc plate fixing groove; 56. a lower arc plate through hole; 57. a lower arc plate baffle; 58. an initial flow regulating spring; 59. an initial direction-adjusting plate;

6. a lower interlayer fixing plate;

7. a first-stage cylindrical one-way valve; 71. a cartridge valve housing; 72. a cylinder valve spring; 73. an outer valve port; 74. a valve inner port; 75. a bearing; 76. a cartridge valve flow passage; 77 cartridge valve inner housing;

8. a left working chamber;

9. a leak-proof piston; 91. a piston housing; 92. a piston inner chamber; 93. a second fixing rod; 94. a third fixing rod; 95. a fixed slider is collected; 96. a fourth fixing rod; 97. a first spring; 98. an inner tank; 99. a cavity supporting sliding block; 910. a first hinge lever; 911. a second hinge lever; 912. a fifth fixing lever; 913. a circular base; 914. a steering spring fixed end; 915. a second fixed end; 916. an anti-collision groove; 917. a slide base;

10. A right working chamber;

11. a second-stage ball-shaped check valve; 111. sealing the cue; 112. a second rubber; 113. a sealing plate; 114. a seal spring; 115. a hinged end; 116. a sixth fixing rod; 117. a third fixed end; 118. a fixing rod seven; 119. separating the fixed ends; 1110. a fourth fixed end;

12. an outflow chamber;

13. a fluid diversion device; 131. a fifth fixed end; 132. a first rotating shaft; 133. side baffles; 134. a spring fixed end; 135. a direction-changing spring; 136. a fixed end of a direction-changing spring; 137. a second rotating shaft; 138. a sixth fixed end; 139. an upper baffle; 1310. a third rubber;

14. outflow adjusting device; 141. an outflow adjusting plate; 142. a outflow adjusting spring; 143. a outflow adjusting spindle; 144. fixing an adjusting plate; 145. a fixed end 7;

15. an upper interlayer fixing plate;

16. an outlet line.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Examples: as shown in fig. 1-10, this embodiment discloses a double-acting constant speed reciprocating pump, which comprises a pump shell 3, wherein the inner cavity of the pump shell 3 is sequentially divided into an inflow cavity 4, a working cavity and an outflow cavity 12 by a lower interlayer fixing plate 6 and an upper interlayer fixing plate 15, the inflow cavity 4 is communicated with an inlet pipeline 1, the outflow cavity 12 is communicated with an outlet pipeline 16, a leakage-proof piston 9 is arranged in the working cavity, the leakage-proof piston 9 divides the working cavity into a left working cavity 8 and a right working cavity 10, the leakage-proof piston 9 is externally connected with a constant speed transmission device 2, the leakage-proof piston 9 reciprocates under the action of the constant speed transmission device 2, thereby changing the volume sizes of the left working cavity 8 and the right working cavity 10,

the left working chamber 8 and the right working chamber 10 are respectively communicated with the inflow chamber 4 through a first-stage cylindrical one-way valve 7, the left working chamber 8 and the right working chamber 10 are respectively communicated with the outflow chamber 12 through a second-stage spherical one-way valve 11,

An initial flow distribution device 5 is arranged in the inflow chamber 4, flow distribution is carried out according to inflow flow, and fluid is guided to directly pass through the primary cylindrical one-way valve when the flow is low, so that the pumping efficiency is improved;

the outflow chamber 12 is provided with a fluid diversion device and an outflow adjusting device 13, which are used for adjusting the fluid entering the outflow chamber 12 from the left working chamber 8 and the right working chamber 10, avoiding the merging and impacting of two fluids, guiding the direction of the fluid flowing to an outlet pipeline 16, and improving the fluid outflow state.

As shown in fig. 1, 2 and 3, the uniform speed transmission device 2 comprises a transmission device shell 21, a transmission device cavity 22, an upper gear shaft 23, a first upper gear 25, a second upper gear 24, a piston transmission rod 26, a first rubber 27, a driving gear 28, a lower gear shaft 29, a first lower gear 211, a second lower gear 210, a gear rod 212, a motor shaft 213, a first rubber 27 arranged at the junction of the transmission device shell 21, a pump shell 3 and the piston transmission rod 26, and sealed to prevent liquid from entering the transmission device cavity 22, the driving gear 28 arranged on the motor shaft 213, an external motor for driving, and a positive rotation, wherein the driving gear 28 is simultaneously meshed with the first upper gear 25 fixed on the upper gear shaft 23 and the first lower gear 211 fixed on the lower gear shaft 29, the first upper gear 25 and the first lower gear 211 are symmetrically distributed around the axis of the driving gear 28, rotate in the same direction and are reversed, the upper gear shaft 23 and the lower gear shaft 29 are symmetrically distributed around the axis of the driving gear 28 and rotate in the same direction, the second upper gear 24 is fixed on the upper gear shaft 23 by a key slot and rotates reversely along with the upper gear shaft 23, the second lower gear 210 is fixed on the lower gear shaft 29 by a key slot and rotates reversely along with the lower gear shaft 29, the second upper gear 24 and the second lower gear 210 are both left half non-gears, the right half is provided with gears and symmetrically distributed relative to the two sides of the toothed bar 212, the toothed bar 212 is simultaneously meshed with the second upper gear 24 and the second lower gear 210, one side of the second lower gear 210 provided with teeth number is meshed with the toothed bar 212 to drive the toothed bar 212 to move leftwards, meanwhile, half of the second upper gear 24 is meshed with the toothed bar 212 without influencing the movement of the toothed bar 212, half of the second lower gear 210 is meshed with the toothed bar 212 after the toothed bar 212 moves to the leftmost side, meanwhile, the second upper gear 24 is provided with half of the gear to be meshed with the toothed bar 212, so that the toothed bar 212 is driven to move rightwards, the toothed bar 212 is completed to move leftwards and rightwards at a uniform speed, and the piston transmission rod 26 is fixed at one end of the toothed bar 212 and moves synchronously along with the toothed bar 212.

The driving gear 28 rotates forward, the first upper gear 25 and the first lower gear 211 are symmetrically arranged about an axis of the rack bar 212, the rotation direction is reverse, the second upper gear 24 and the second lower gear 210 are symmetrically arranged about an axis of the driving gear 28, the rotation direction is reverse, the transmission ratio of the driving gear 28 to the second upper gear 24 is 0.5, the transmission ratio of the driving gear 28 to the second lower gear 210 is 0.5, and the ratio of the unidirectional movement distance of the rack bar 212 to the half circle tooth engagement rotation distance of the first upper gear 25 and the first lower gear 211 is 1:1.

As shown in fig. 1, 4 and 5, the anti-leakage piston 9 is disposed between the lower and upper diaphragm fixing plates 6 and 15, and includes a piston housing 91, a piston cavity 92, a second fixing rod 93, a third fixing rod 94, a set fixing slider 95, a fourth fixing rod 96, a first spring 97, an inner groove 98, a cavity-supporting slider 99, a first hinge rod 910, a second hinge rod 911, a fifth fixing rod 912, a circular base 913, a steering spring fixing end 914, a second fixing end 915, an anti-collision groove 916, a sliding base 917, a front and rear face of the piston housing 91 is closely attached to the pump housing 3, upper and lower faces are closely attached to the lower diaphragm fixing plate 6 and the upper diaphragm fixing plate 15, the right side is connected to the piston driving rod 26, the left and right sides of the piston driving rod 26 are moved, the sizes of the left and right working chambers 8 and 10 are changed, the inner piston cavity 92 is formed inside the fourth fixing rod 96 is located at the central axis of the piston cavity 92, the piston cavity is divided into an upper symmetrical piston cavity and a lower symmetrical piston cavity, a plurality of third fixing rods 94 are symmetrically arranged on the piston cavity, a set of fixing sliding blocks 95 are arranged in the middle of a fourth fixing rod 96 and can slide along the fourth fixing rod 96, one ends of first springs 97 are fixed at four corners of the piston cavity, the other ends of the first springs 97 are fixed at steering spring fixing ends 914, the steering spring fixing ends 914 are arranged on the same center axis of a circular base 913, the center axis of the circular base 913 can be used as a rotating shaft for rotating, the circular base 913 is fixed on a sliding base 917, the sliding base 917 can move up and down along a second fixing rod 93, one end of the second fixing rod 93 is arranged on the third fixing rod 94 with a groove, the other end of the second fixing rod 93 is connected with a second fixing end 915 with an anti-collision groove 916, the groove can play a role in buffering collision, meanwhile, the sliding distance of the sliding base 917 is limited, the sliding base 917 is symmetrically fixed with a fifth fixed rod 912 at the left and right sides and the same level, one end of the second hinge rod 911 is fixed on the fifth fixed rod 912, the other end is hinged with the first hinge rod 910, the included angle between the second hinge rod 911 and the first hinge rod 910 can be changed according to the actual motion state, the other end of the first hinge rod 910 is hinged with a cavity supporting slide block 99, and the cavity supporting slide block 99 can slide left and right in an inner groove 98 positioned in the piston housing 91 and generate a certain pressure on the piston housing 91.

The piston housing 91 moves left and right in the groove of the lower interlayer fixing plate 6, the length of the groove is slightly larger than the maximum distance of the left and right movement of the piston housing 91, four first springs 97 are arranged, the four springs are respectively positioned at four corners of the fixed slide block 95, four third fixing rods 94 are arranged, two of the four springs are positioned above the fourth fixing rods 96 and symmetrically distributed about the vertical central line of the piston housing 91, the other two springs are positioned below the fourth fixing rods 96 and symmetrically distributed about the vertical central line of the piston housing 91, the cavity supporting slide blocks 99, the first hinging rods 910, the second hinging rods 911 and the fifth hinging rods 912 which are positioned at two sides of the sliding base 917 are symmetrically distributed, and the length of the second hinging rods 93 is smaller than the sum of the lengths of the first hinging rods 910 and the second hinging rods 911, and the cavity supporting slide blocks 99 are always in a pressed state.

As shown in fig. 1 and 6, the initial flow distribution device 5 is arranged at the central axis of the inflow chamber 4, and the components can be divided into an inner part and an outer part, which comprises a first fixed end 51, a first fixed rod 52, an upper arc plate baffle 53, an upper arc plate through hole 54, a lower arc plate fixed slot 55, a lower arc plate through hole 56, a lower arc plate baffle 57, an initial flow regulating spring 58, an initial flow regulating plate 59, wherein the upper end of the first fixed rod 52 is arranged on the lower interlayer fixed plate 6 through the first fixed end 51, the initial flow regulating plate 59 is hinged to the lower end of the first fixed rod 52, two ends of the initial flow regulating spring 58 are respectively arranged on the initial flow regulating plate 59 and the first fixed rod 52, the upper arc plate baffle 53 and the upper arc plate through hole 54 jointly form an upper frame of the initial flow distribution device 5, the lower arc plate through hole 56 and the lower arc plate baffle 57 jointly form a bottom frame of the initial flow distribution device 5, and the initial flow regulating spring 58 is fixed inside the pump shell 3 through the lower arc plate fixed slot 55;

Wherein, the ratio of the arc length of the upper arc plate baffle 53 to the arc length of the upper arc plate through hole 54 is 2:1, and the ratio of the arc length of the lower arc plate through hole 56 to the arc length of the lower arc plate baffle 57 is 2:1.

as shown in fig. 1 and 7, the first-stage cylindrical check valve 7 is fixedly penetrating the lower interlayer fixing plate 6, and two of the first-stage cylindrical check valves are symmetrically arranged about the vertical center line of the pump and are respectively communicated with the left working chamber 8 and the inflow chamber 4 and the right working chamber 10 and the inflow chamber 4. The primary cylindrical one-way valve 7 is composed of a cylinder valve outer shell 71, a cylinder valve spring 72, a valve outer through hole 73, a valve inner through hole 74, a bearing 75, a cylinder valve runner 76 and a cylinder valve inner shell 77, wherein the cylinder valve outer shell 71 penetrates through the fixed lower interlayer fixing plate 6, the bearing 75 is arranged at the part of the primary cylindrical one-way valve, which is positioned in the inflow chamber 4, the valve outer through hole 73 is arranged at the part of the primary cylindrical one-way valve, the valve outer through hole 73 is communicated with the primary cylindrical one-way valve, the cylinder valve inner shell 77 is connected to the inner side of the cylinder valve outer shell 71 through the cylinder valve spring 72 and is tightly attached, the wall surface of the primary cylindrical one-way valve inner shell is provided with the valve inner through hole 74, and the cylinder valve runner 76 is formed by wrapping the cylinder valve inner shell 77 and is communicated with the valve inner through hole 74.

When the cylinder valve spring 72 is in a natural state, the valve outer through hole 73 and the valve inner through hole 74 are completely closed, the height of the valve outer through hole 73 close to the side of the cylinder valve inner shell 77 and the height of the valve inner through hole 74 are 1:1, and the compressible free range of the cylinder valve spring 72 is slightly larger than the height of the valve outer through hole 73.

The outflow chamber 12 is internally provided with a second-stage spherical one-way valve 11, a fluid direction changing device 13 and an outflow regulating device 14, the second-stage spherical one-way valve 11 is penetrated and fixed on an upper interlayer fixing plate 15, two second-stage spherical one-way valves are symmetrically arranged about the vertical central line of the pump and are respectively communicated with the left working chamber 8, the outflow chamber 12, the right working chamber 10 and the outflow chamber 12, and the fluid direction changing device 13 and the outflow regulating device 14 are matched to guide fluid to enter an outlet pipeline 16.

The fluid diversion device 13 is fixed at two corners above the inside of the pump shell 3, and two diversion springs 135 are symmetrically arranged on the vertical central line of the pump, and the fluid diversion device comprises a fifth fixed end 131, a first rotating shaft 132, a side baffle 133, a spring fixed end 134, a diversion spring 135, a diversion spring fixed end 136, a second rotating shaft 137, a sixth fixed end 138, an upper baffle 139, a third rubber 1310, the fifth fixed end 131 is fixed inside the pump shell 3, the first rotating shaft 132 is installed on the fifth fixed end 131, the side baffle 133 forms a fixed angle with the upper baffle 139, the intersection end is fixed on the first rotating shaft 132, the third rubber 1310 is fixed on the side of the other end of the upper baffle 139 close to the pump shell 3, one end of each diversion spring 135 is connected to the spring fixed end 134 arranged on the side baffle 133, the other end is connected to the diversion spring fixed end 136, the diversion spring fixed end 136 is installed on the sixth fixed end 138 through the second rotating shaft 137, and the sixth fixed end 138 is arranged inside the pump shell 3.

Referring to fig. 1 and 9, the outflow adjusting device 14 is mounted in the middle of the upper spacer fixing plate 15 through a seventh fixing end 145, and includes an outflow adjusting plate 141, an outflow adjusting spring 142, an outflow adjusting shaft 143, a fixing adjusting plate 144, one end of the outflow adjusting plate 141 is fixed on the outflow adjusting shaft 143, the outflow adjusting shaft 143 is disposed at the top of the seventh fixing end 145, the fixing adjusting plate 144 is disposed at the seventh fixing end 145, two symmetrical outflow adjusting shafts 143 are disposed, one end of the outflow adjusting spring 142 is fixed on the outflow adjusting plate 141, and the other end is fixed on the fixing adjusting plate 144, and a plurality of outflow adjusting shafts 143 are symmetrically disposed.

Wherein, fixed regulating plate 144 sets up two with the axis symmetry that outflow regulation pivot 143 is located, and outflow regulating plate 141 and fixed regulating plate 144 use outflow regulation pivot 143 as rotation center circumference evenly arrange, and adjacent two part angles are 120 degrees, and outflow regulating spring 142 each side sets up three, sets up six altogether.

As shown in fig. 1 and 10, the two-stage ball check valve 11 includes a sealing club 111, a second rubber 112, a sealing plate 113, a sealing spring 114, a third hinged end 115, a sixth fixing rod 116, a third fixing end 117, a fixing rod seven 118, a separating fixing end 119, a fourth fixing end 1110, wherein the separating fixing end 119 is vertically fixed on the upper interlayer fixing plate 15, the third fixing end 117 is horizontally embedded in the upper interlayer fixing plate 15, one end of the sealing plate 113 is hinged on the upper interlayer fixing plate, the convex design can limit the rotation angle of the sealing plate 113, the other end is provided with the second rubber 112, two ends of the sealing spring 114 are respectively fixed on the sealing plate 113 and the separating fixing end 119, a plurality of sealing springs are respectively arranged, the third hinged end 115 is installed on the sealing plate 113 and connected with the sixth fixing rod 116, the rotation of the sixth fixing rod 116 can be limited by a plurality of angles, the other end of the sixth fixing rod 116 is installed on the fourth fixing end 1110, the fourth fixing end 1110 is installed on the fixing rod seven 118, and the other end of the fixing rod seven 118 is provided with the sealing club 111;

The sixth fixing rod 116 rotates around the hinged end 115 by a maximum angle perpendicular to the sealing plates 113, eight sealing springs 114 are arranged, two sealing plates 113 are arranged on each sealing plate 113, and a fixed included angle of 75 degrees is formed between the side baffle 133 and the upper baffle 139;

the working process of the invention is as follows:

the device starts, the motor drives the motor shaft 213 to rotate positively, the driving gear 28 is driven to rotate positively, the first upper gear 25 and the first lower gear 211 are meshed with the driving gear 28 respectively, the first upper gear 25 and the second upper gear 24 rotate reversely at the same speed, the first lower gear 211 and the second lower gear 210 rotate reversely coaxially, the second upper gear 24 and the second lower gear 210 are arranged in the same direction, the second lower gear 210 is meshed with the toothed bar 212 first during reverse rotation, the toothed bar 212 is driven to move leftwards uniformly, at the moment, one side of the second upper gear 24, which is not meshed with the toothed bar 212, does not affect the movement of the toothed bar 212, the anti-leakage piston 9 moves leftwards uniformly along with the toothed bar 212 through the piston transmission rod 26, the anti-leakage piston 9 divides a space formed between the lower interlayer fixing plate 6 and the upper interlayer fixing plate 15 into a left working cavity 8 and a right working cavity 10, the anti-leakage piston 9 moves leftwards continuously, the volume of the left working cavity 8 is continuously reduced, the pressure is gradually increased, and conversely the volume of the right working cavity 10 is gradually reduced.

Next, in order to balance the pressure of the chamber, the sixth fixing rod 116 on the left two-stage ball check valve 11 is pushed upward to drive the sealing rod 111 to rise and simultaneously open the sealing plate 113 to two sides, the sealing spring 114 is in a compressed state, the liquid is pumped into the outflow chamber 12 from the left working chamber 8, the cylinder valve inner shell 77 in the right one-stage cylinder check valve 7 is continuously moved upward at this moment, the cylinder valve spring 72 is compressed, the valve inner port 74 is communicated with the valve outer port 73, the cylinder valve flow channel 76 is communicated with the right working chamber 10, and since the initial flow distribution device 5 is additionally arranged in the inflow chamber 4, the liquid pumped from the inlet pipeline 1 is pumped into the cylinder valve flow channel 76 along the space formed by the lower arc plate baffle 57 and the initial direction regulating plate 59 under the condition of small flow, so that the liquid enters the working chamber, if the flow is large, the initial direction regulating plate 59 is impacted by the fluid so that the initial direction regulating spring 58 is in a compressed state, and part of the liquid can be stored in the inflow chamber 4 through the upper arc plate port 56.

Next, when the gearless side of the second lower gear 210 starts to mesh with the toothed bar 212 after rotating for half a turn, at this time, the gearless side of the second upper gear 24 meshes with the toothed bar 212, driving the toothed bar 212 to move rightwards at a uniform speed, the inner set fixing slider 95 of the anti-leakage piston 9 continues to slide leftwards due to the inertia effect, the left upper and lower two first springs 97 are in a compressed state, the sliding base 917 is pushed to move upwards and downwards along the second fixing bar 93 respectively until striking the anti-collision groove 916 at the second fixing end 915, the force perpendicular to the piston housing 91 is increased to the cavity supporting slider 99 by the first hinge bar 910 and the second hinge bar 911, at this time, the right upper and lower two first springs 97 are in a stretched state, the sliding base 917 is pushed to move towards the middle along the second fixing bar 93 until striking the groove of the third fixing bar 94, the two cavity supporting sliding blocks 99 on the right side are still in a force application state at the moment, so that the mutual leakage of the liquid working cavities is prevented under the condition that the pressures of the left working cavity and the right working cavity are suddenly changed, otherwise, as the toothed bar 212 continues to move towards the right side, the volume of the right working cavity 10 is reduced, the pressure is gradually increased, the volume of the left working cavity 8 is increased, the pressure is gradually reduced, the working flow of pumping the right side and pumping the left side in the pump can be completed, then one side of the second lower gear 210 with a gear starts to be meshed with the toothed bar 212, the non-gear side of the second upper gear 24 is meshed with the toothed bar 212, and the toothed bar 212 drives the anti-leakage piston 9 to move leftwards at a uniform speed through the piston transmission rod 26, so that the liquid is continuously pumped.

Next, as the liquid is discharged from the second-stage ball-shaped check valve 11, the upper baffle 139 in the fluid diversion device 13 is firstly impacted to be clung to the inner wall of the pump shell 3, the upper baffle 139 is fixedly connected with the side baffle 133, the side baffle 133 rotates around the first rotating shaft 132 for a certain angle, the diversion spring 135 is stretched, the upper baffle 139 and the side baffle 133 at a certain angle can guide the impacted liquid to the middle part of the outflow chamber 12, and when the left side is pumped out, the left side liquid in the outflow chamber 12 impacts the outflow regulating plate 141 in the outflow regulating device 14, so that the outflow regulating plate 141 rotates around the outflow regulating rotating shaft 143 for a certain angle, the channel of the outlet pipeline 16 at the left side is enlarged, direct collision of the liquid from the left side and the right side is effectively prevented, the outflow state of the fluid is improved, and the flow stability is improved.

The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (10)

1. The double-acting constant-speed reciprocating pump is characterized by comprising a pump shell (3), wherein the inner cavity of the pump shell (3) is sequentially divided into an inflow cavity (4), a working cavity and an outflow cavity (12) by a lower interlayer fixing plate (6) and an upper interlayer fixing plate (15), the inflow cavity (4) is communicated with an inlet pipeline (1), and the outflow cavity (12) is communicated with an outlet pipeline (16);

the anti-leakage piston (9) is arranged in the working cavity, the working cavity is divided into a left working cavity (8) and a right working cavity (10) by the anti-leakage piston (9), the anti-leakage piston (9) is externally connected with a constant speed transmission device (2), the anti-leakage piston (9) moves back and forth under the action of the constant speed transmission device (2), so that the volume of the left working cavity (8) and the right working cavity (10) is changed, the left working cavity (8) and the right working cavity (10) are respectively communicated with the inflow cavity (4) through a primary cylindrical one-way valve (7), and the left working cavity (8) and the right working cavity (10) are respectively communicated with the outflow cavity (12) through a secondary spherical one-way valve (11);

an initial flow distribution device (5) is arranged in the inflow chamber (4), and the initial flow distribution device (5) distributes flow according to inflow flow, so that pumping efficiency is improved;

The outflow chamber (12) is internally provided with a fluid diversion device (13) and an outflow adjusting device (14) which are used for adjusting fluid entering the outflow chamber (12) from the left working cavity (8) and the right working cavity (10), avoiding the merging and impacting of two fluids, guiding the direction of the fluid flowing to an outlet pipeline (16) and improving the outflow state of the fluid.

2. The double-acting constant speed reciprocating pump as claimed in claim 1 wherein the constant speed transmission (2) comprises a transmission housing (21), an upper gear shaft (23), a first upper gear (25), a second upper gear (24), a piston transmission rod (26), a first rubber (27), a driving gear (28), a lower gear shaft (29), a first lower gear (211), a second lower gear (210), a toothed bar (212), a motor shaft (213), wherein the first rubber (27) is arranged at the junction of the transmission housing (21), the pump housing (3) and the piston transmission rod (26), the driving gear (28) is arranged on the motor shaft (213) and is driven by an external motor, the driving gear (28) is simultaneously externally meshed with the first upper gear (25) fixed on the upper gear shaft (23) and the first lower gear (211) fixed on the lower gear shaft (29), the first upper gear (25) and the first lower gear (211) are symmetrically distributed about the axis of the driving gear (28), the driving gear (28) and the driving gear (28) are symmetrically distributed about the axis of the lower gear (29), the second upper gear (24) is fixed on the upper gear shaft (23) through a key slot and rotates along with the upper gear shaft (23), the second lower gear (210) is fixed on the lower gear shaft (29) through a key slot and rotates along with the lower gear shaft (29), the second upper gear (24) and the second lower gear (210) are half-gearless, gears are arranged in half and symmetrically distributed on two sides of the toothed bar (212), the toothed bar (212) is simultaneously meshed with the second upper gear (24) and the second lower gear (210) in an external mode, and the piston transmission rod (26) is fixed at one end of the toothed bar (212) and moves synchronously along with the toothed bar (212);

The first upper gear (25) and the first lower gear (211) are symmetrically arranged on the axis of a toothed bar (212), the second upper gear (24) and the second lower gear (210) are symmetrically arranged on the axis of the driving gear (28), the transmission ratio of the driving gear (28) to the second upper gear (24) is 1:2, the transmission ratio of the driving gear (28) to the second lower gear (210) is 1:2, and the ratio of the unidirectional movement distance of the toothed bar (212) to the half-circle tooth number engagement rotation distance of the first upper gear (25) and the first lower gear (211) is 1:1;

when the gear rack is in operation, the gear of the second lower gear (210) and the gear of the second upper gear (24) are alternately meshed with the gear rack (212), so that the gear rack (212) is driven to reciprocate at a constant speed.

3. The double-acting constant velocity reciprocating pump according to claim 2 wherein the leak-proof piston (9) is disposed between the lower partition fixed plate (6) and the upper partition fixed plate (15), and comprises a piston housing (91), a piston inner cavity (92), a second fixed rod (93), a third fixed rod (94), a collection fixed slide block (95), a fourth fixed rod (96), a first spring (97), an inner groove (98), a support cavity slide block (99), a first hinging rod (910), a second hinging rod (911), a fifth fixed rod (912), a circular base (913), a steering spring fixed end (914), a second fixed end (915), an anti-collision groove (916), and a sliding base (917), wherein the piston housing (91) is connected with the piston transmission rod (26) and moves reciprocally along with the piston transmission rod (26), thereby changing the sizes of the left working cavity (8) and the right working cavity (10), the interior of the piston housing (91) forms a piston inner cavity (92), the fourth fixed rod (96) is disposed in the piston inner cavity (92), the piston inner cavity (92) is disposed at the position of the piston inner cavity (92), the piston inner cavity (92) is symmetrically divided into two piston inner cavities (94), the utility model discloses a hinge device, including a first hinge rod (910), a second hinge rod (910), a third hinge rod (910), a fourth hinge rod (917), a fourth hinge rod (96), a fourth hinge rod (917), a first hinge rod (99), a second hinge rod (912), a third hinge rod (910), a fourth hinge rod (917), a third hinge rod (910), a fourth hinge rod (917), a fourth hinge rod (93), a first hinge rod (910), a second hinge rod (917), a third hinge rod (99), a third hinge rod (911), a second hinge rod (917), a third hinge rod (93), a second hinge rod (93), a third hinge rod (911), a second hinge rod (93) and a second hinge rod (910), wherein the fourth hinge rod (917) can move up and down along the second hinge rod (93), one end of the second hinge rod (93) is connected to the third hinge rod (94) with a groove, the other end of the second hinge rod (915) is connected to the second hinge rod (915 with the anti-collision groove, the groove can play a role of buffering the collision, and simultaneously limit the sliding distance of the sliding base (917) is limited, the hinge rod (917) is symmetrically and the hinge. The cavity supporting slide block (99) can slide left and right in the inner groove (98) positioned in the piston housing (91) and generate certain pressure on the piston housing (91).

4. A double-acting constant-speed reciprocating pump as claimed in claim 3, wherein the piston housing (91) moves left and right in the groove of the lower interlayer fixing plate (6), the length of the groove is greater than the maximum distance of left and right movement of the piston housing (91), four first springs (97) are respectively arranged at four corners of the collection fixing sliding block (95), four third fixing rods (94) are respectively arranged, two of the four fixing rods are arranged above the fourth fixing rods (96) symmetrically about the vertical center line of the piston housing (91), the other two fixing rods are arranged below the fourth fixing rods (96) symmetrically about the vertical center line of the piston housing (91), cavity supporting sliding blocks (99), a first hinging rod (910), a second hinging rod (911) and a fifth fixing rod (912) which are arranged at two sides of the sliding base (917) are symmetrically distributed, the lengths of the second hinging rod (93) are smaller than the lengths of the first hinging rod (910), the second hinging rod (911) and the fifth fixing rod (912) are always in a squeezed hinging state.

5. Double acting constant velocity reciprocating pump according to claim 1, characterized in that the initial flow distribution device (5) is arranged at the central axis of the inflow chamber (4) and comprises a first fixed end (51), a first fixed rod (52), an upper arc plate baffle (53), an upper arc plate through hole (54), a lower arc plate fixed groove (55), a lower arc plate through hole (56), a lower arc plate baffle (57), an initial flow regulating spring (58), an initial flow regulating plate (59), wherein the upper end of the first fixed rod (52) is connected to the lower interlayer fixed plate (6) through the first fixed end (51), the initial flow regulating plate (59) is hinged to the lower end of the first fixed rod (52), two ends of the initial flow regulating spring (58) are respectively connected to the initial flow regulating plate (59) and the first fixed rod (52), the initial flow regulating plate (59) forms an included angle with the first fixed rod (52) through flow magnitude control, the upper arc plate (53) and the upper arc plate (5) form an initial flow distribution device (5) through hole (56) together with the lower arc plate (52), is fixed inside the pump shell (3) through the lower arc plate fixing groove (55);

The ratio of the arc length of the upper arc plate baffle (53) to the arc length of the upper arc plate through hole (54) is 2:1, and the ratio of the arc length of the lower arc plate through hole (56) to the arc length of the lower arc plate baffle (57) is 2:1.

6. the double-acting constant velocity reciprocating pump according to claim 1, wherein the fluid direction changing device (13) is fixed above the inside of the outflow chamber (12), two fluid direction changing devices are symmetrically arranged around the vertical center line of the pump, each fluid direction changing device comprises a fifth fixed end (131), a first rotating shaft (132), a side baffle plate (133), a spring fixed end (134), a direction changing spring (135), a direction changing spring fixed end (136), a rotating shaft two (137), a sixth fixed end (138), an upper baffle plate (139), a third rubber (1310), wherein the fifth fixed end (131) is connected inside the pump shell (3), the first rotating shaft (132) is connected to the fifth fixed end (131), the side baffle plate (133) and the upper baffle plate (139) form a fixed angle, an intersection end is fixed on the first rotating shaft (132), the third rubber (1310) is fixed on one side of the other end of the upper baffle plate (139) close to the pump shell (3), one end of the direction changing spring (135) is connected to the spring (134) arranged on the side baffle plate (133), the other end of the direction changing spring (135) is connected to the fixed end (136) on the sixth fixed end (137) through the direction changing spring (136), the sixth fixed end (138) is arranged inside the pump shell (3).

7. The double-acting constant-speed reciprocating pump according to claim 1, wherein the outflow adjusting device (14) is connected to the middle part of the upper interlayer fixing plate (15) through a seventh fixing end (145), and comprises an outflow adjusting plate (141), an outflow adjusting spring (142), an outflow adjusting rotating shaft (143) and a fixed adjusting plate (144), one end of the outflow adjusting plate (141) is connected to the outflow adjusting rotating shaft (143), the outflow adjusting rotating shaft (143) is arranged at the top of the seventh fixing end (145), the fixed adjusting plate (144) is arranged at the seventh fixing end (145), two fixed ends are symmetrically arranged with respect to the outflow adjusting rotating shaft (143), one end of the outflow adjusting spring (142) is fixed on the outflow adjusting plate (141), the other end of the outflow adjusting spring is fixed on the fixed adjusting plate (144), and a plurality of fixed ends are symmetrically arranged with respect to the outflow adjusting rotating shaft (143).

8. The double-acting constant-speed reciprocating pump according to claim 7, wherein two fixed adjusting plates (144) are symmetrically arranged on the axis where the outflow adjusting rotating shaft (143) is located, the outflow adjusting plates (141) and the fixed adjusting plates (144) are circumferentially and uniformly arranged on the basis of the outflow adjusting rotating shaft (143) as a rotating center, the angles of two adjacent parts are 120 degrees, three outflow adjusting springs (142) are arranged on each side, and six outflow adjusting springs are arranged on each side.

9. A double-acting constant-speed reciprocating pump as claimed in claim 1, wherein the primary cylindrical one-way valve (7) comprises a cylindrical valve outer housing (71), a cylindrical valve spring (72), a valve outer through-opening (73), a valve inner through-opening (74), a bearing (75), a cylindrical valve flow passage (76), a cylindrical valve inner housing (77), the cylindrical valve outer housing (71) penetrates through the fixed lower partition fixed plate (6), the bearing (75) is arranged at a part positioned in the inflow chamber (4), the valve outer through-opening (73) is arranged at a part positioned in the working chamber, the valve outer through-opening (73) is communicated with the working chamber, the cylindrical valve inner housing (77) is connected to the inner side of the cylindrical valve outer housing (71) through the cylindrical valve spring (72) and is tightly attached, the valve inner through-opening (74) is arranged on the wall surface of the cylindrical valve inner housing (77), and the cylindrical valve flow passage (76) is formed by wrapping the cylindrical valve inner housing (77) and is communicated with the valve inner through-opening (74);

when the cylinder valve spring (72) is in a natural state, the valve outer opening (73) and the valve inner opening (74) are completely closed, the height of the valve outer opening (73) close to the side of the cylinder valve inner shell (77) and the height of the valve inner opening (74) are 1:1, and the compressible free range of the cylinder valve spring (72) is slightly larger than the height of the valve outer opening (73).

10. The double-acting constant velocity reciprocating pump as claimed in claim 1 wherein the second stage ball check valve (11) is connected to the upper interlayer fixing plate (15) in a penetrating manner, two second stage ball check valves (11) are symmetrically arranged around the vertical center line of the pump, the second stage ball check valve (11) comprises a sealing ball rod (111), a second rubber (112), a sealing plate (113), a sealing spring (114), a third hinged end (115), a sixth fixing rod (116), a third fixing end (117), a fixing rod seven (118), a separating fixing end (119), a fourth fixing end (1110), the separating fixing end (119) is vertically connected to the upper interlayer fixing plate (15), the third fixing end (117) is horizontally embedded in the upper interlayer fixing plate (15), the third fixing end (117) is hinged to one end of the sealing plate (113), the other end of the sealing plate (113) is provided with the second rubber (112), two ends of the sealing spring (114) are respectively connected to the sealing plate (113) and the separating fixing end (119), a plurality of third hinged ends (119) are arranged, the third fixed ends (115) are connected to the sixth fixing end (116) in a rotating manner, the other ends (116) are connected to the sixth fixing rod (116) in a limited manner, the fourth fixed end (1110) is connected to the fixed rod seven (118), and the sealing ball rod (111) is arranged at the other end of the fixed rod seven (118);

The sixth fixing rod (116) rotates around the third hinging end (115) to be perpendicular to the sealing plate (113), and the side baffle plate (133) and the upper baffle plate (139) form a fixed included angle of 75 degrees.