CN115717582B

CN115717582B - Reciprocating pump

Info

Publication number: CN115717582B
Application number: CN202211501345.6A
Authority: CN
Inventors: 周财华; 周良; 严红芳
Original assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Current assignee: DEPAMU (HANGZHOU) PUMP TECHNOLOGY CO LTD
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2024-02-27
Anticipated expiration: 2042-11-28
Also published as: CN115717582A

Abstract

The invention discloses a reciprocating pump, which comprises a base, wherein a motor is arranged on the base, an output shaft of the motor is fixedly connected with an input shaft of a speed reducer, the output shaft of the speed reducer is connected with a transmission mechanism for conveying materials at a constant speed and controlling flow, a plurality of sealing cylinders are arranged on the base, plungers are slidably clamped in the sealing cylinders and are connected with the transmission mechanism, one ends of the sealing cylinders, far away from the transmission mechanism, are fixedly connected with pump cylinders, one ends of the pump cylinders are fixedly sleeved with a material pipe, and the other ends of the pump cylinders are fixedly sleeved with a material discharging pipe. The plunger is subjected to uniform reciprocating motion through the transmission mechanism, so that the material conveying flow pumped in the pump cylinder is kept uniform, the purpose of uniform conveying is achieved, the quantity of the moving plungers is regulated through the transmission mechanism, the regulation of the flow is achieved, and the use is convenient.

Description

Reciprocating pump

Technical Field

The invention relates to the technical field of pumps, in particular to a reciprocating pump.

Background

The reciprocating pump is a positive displacement pump, the purpose of conveying liquid is achieved by means of the periodical change of the volume in a working cavity, the reciprocating pump is widely applied to various industries such as petroleum, chemical industry, water supply, thermoelectricity, nuclear industry, pharmacy, food and the like, professional matching performance is strong, the requirements of different clients and different process working conditions can be met, the obvious defects in the use of the reciprocating pump are that the reciprocating motion of a piston is obtained by changing a crank mechanism rotating at a constant speed, the speed change of the piston follows a sinusoidal rule, the movement speed of the piston is also sinusoidal rule, the material speed conveyed by the piston is not uniform, the material conveying speed is uneven, the situation that the time is large and small exists is caused, the relative positions of cranks of all cylinders are distributed equidistantly by the conventional multi-cylinder pump of the reciprocating pump, the flow is uniform, but the problem of uneven flow can be only be relieved by the design, the conventional reciprocating pump cylinder is still unable to achieve the purpose of uniform conveying, the flow of the reciprocating pump is fixed, the flow of the reciprocating pump is determined by the rotation speed of an input motor of the crank mechanism, the flow speed can be changed, the flow speed of the motor is also is not uniform, the flow is regulated, and the flow is difficult to control when the reciprocating pump is accurate to solve.

Disclosure of Invention

In order to solve the problems that the instantaneous flow of a multi-cylinder pump of the reciprocating pump is equal to the sum of the instantaneous flow of each cylinder at the same moment, the flow is uniform as long as the relative positions of the cranks of each cylinder are proper, but the design can only relieve the problem of uneven flow, but the aim of uniform speed conveying can not be achieved, the flow of the reciprocating pump is fixed when the pump cylinder of the existing reciprocating pump is used, the flow of the reciprocating pump is determined by the rotating speed of an input motor of a crank mechanism, the rotating speed of the motor is changed, the flow speed of the flow can be changed, and the problem that the flow regulation and control are difficult to be accurate is caused because the flow is uneven when the crank mechanism is used for conveying; the invention aims to provide a reciprocating pump.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a reciprocating pump, includes the base, install the motor on the base, the input shaft of the output shaft fixed connection speed reducer of motor, the output shaft of speed reducer is used for the material to carry at uniform velocity and flow control's drive mechanism, install a plurality of sealed jars on the base, all sliding joint has the plunger in the sealed jar, drive mechanism is connected to the plunger, the one end fixed connection pump jar of drive mechanism is kept away from to sealed jar, the equal fixed cover of one end of pump jar is managed, the other end of pump jar is all fixed to cup joint the discharging pipe.

In a preferred implementation case, one end of each pump cylinder, which is close to the feeding pipe and the discharging pipe, is provided with a one-way valve, a partition plate is fixedly arranged in the inner cavity of the feeding pipe between every two adjacent pump cylinders, the partition plate is fixedly sleeved with the one-way valve, the feeding hole of the feeding pipe is opposite to the discharging hole of the discharging pipe, and the outer wall of the discharging pipe, which is close to the discharging hole, is fixedly provided with a pressure gauge.

The preferred embodiment, drive mechanism includes the fixed box, fixed box fixed mounting is on the base, a plurality of fixed frames of fixed box's inter-wall fixed mounting, all sliding joint has the slip frame in the fixed frame, the equal fixed mounting of top inner wall and bottom inner wall of slip frame has the rack, the pivot has been cup jointed in the rotation between the both sides of fixed box, the output shaft of fixed box and fixed connection speed reducer is run through to the one end of pivot, it has the axle sleeve to rotate on the fixed frame, half gear has been fixedly cup jointed on the axle sleeve of slip frame inner chamber department, half gear engagement rack, the pivot runs through a plurality of axle sleeves, the top of fixed frame is equipped with the depression bar, the screw rod has been cup jointed through the helicitic texture at the top of fixed box, the top surface middle part of the bottom rotation joint depression bar of screw rod, one side outer wall fixed connection output rod of slip frame, the output rod runs through the fixed box and connects the plunger.

In a preferred embodiment, the inner cavity of the fixed box is provided with a plurality of groups of fixed frames, the number of each group of fixed frames is two, the orientations of half gears in the inner cavities of the two fixed frames of each group are opposite, and the top of each group of fixed frames is provided with a compression bar.

In a preferred embodiment, the diameter of the shaft sleeve is larger than that of the rotating shaft, the shaft sleeve coincides with the axis of the rotating shaft, a limiting ring is fixedly arranged on the outer wall of the top of the screw rod, guide rods are fixedly arranged at the tops of the compression rods on two sides of the screw rod, and the guide rods penetrate through the top of the fixed box in a sliding mode.

The clutch pack comprises a fixed disc, the fixed disc is fixedly sleeved on the rotating shafts at the two ends of the shaft sleeve, a fixed ring is fixedly arranged on the outer wall of one end of the shaft sleeve, which is close to the fixed disc, a compression ring is sleeved on the shaft sleeve between the fixed ring and the outer wall of the fixed frame in a sliding manner, a plurality of sliding rods penetrate through the fixed ring in a sliding manner, one end of each sliding rod is fixedly connected with the compression ring, the other end of each sliding rod is fixedly connected with a friction ring, the friction rings can be attached to the fixed disc, a first spring is sleeved on each sliding rod between each friction ring and each friction ring, storage cavities are formed in the tops of the inner walls of two sides of the fixed frame, friction plates are fixedly arranged on one side, which is far away from the sliding frame, of each friction plate penetrates through the outer wall of the fixed frame in a sliding manner, a second spring is arranged between each sliding block and the outer wall of the fixed frame, and an extrusion inclined plane is formed between the inner wall of each compression rod and each sliding block.

In a preferred embodiment, a limiting block is fixedly arranged on the outer wall of one side of the sliding block, which is close to the extrusion inclined plane, a second spring is sleeved on the sliding block between the limiting block and the outer wall of the fixed frame, and the first spring and the second spring are both in a compressed state.

In a preferred embodiment, the bottom integrated into one piece of depression bar is equipped with two pairs of squeeze poles, and squeeze inclined plane is offered to the one side that squeeze pole is close to fixed frame, squeeze inclined plane's vertical projection length is greater than the difference of the degree of depth in accomodating the chamber and the thickness of friction disc.

In a preferred embodiment, the plunger comprises a push-pull rod, one end of the push-pull rod is provided with a storage groove, one end of the output rod, far away from the sliding frame, is clamped with the storage groove, the push-pull rod is sleeved with a locking bolt in a threaded manner, the locking bolt is clamped with the output rod, the end face of the other end of the push-pull rod is integrally formed with a threaded head, the threaded head is in threaded connection with a piston column, and the piston column is clamped with a sealing cylinder.

In a preferred embodiment, the sealing sleeve is fixedly sleeved on the inner wall of one end of the sealing cylinder, which is close to the fixed box, the outer wall of the piston column is tightly attached to the sealing sleeve, the end face of the sealing cylinder is provided with an end cover through a flange, the push-pull rod penetrates through the end cover, a pressure cavity is formed between the piston column and the inner wall of one end of the sealing cylinder, which is far away from the push-pull rod, of the sealing cylinder, a medium pipe is fixedly sleeved on the sealing cylinder, the medium pipe is communicated with the pressure cavity, a cooling cavity is formed in the inner wall of one end of the sealing cylinder, which is far away from the pump cylinder, and two water cooling pipes are fixedly sleeved on the sealing cylinder.

Compared with the prior art, the invention has the beneficial effects that:

the screw rod is rotated to control the upper and lower of the compression rod, when the compression rod moves upwards, the extrusion inclined plane is separated at the moment, the first spring pushes the friction ring to be attached to the fixed disc, meanwhile, the second spring pushes the sliding block, so that the friction plate is separated from the outer wall of the sliding frame, the friction ring rotates along with the fixed disc through friction force, the shaft sleeve is driven to rotate, the half gears are alternately meshed with racks on two sides of the sliding frame, the sliding frame can slide at constant speed in a reciprocating manner, the half gears in each group of fixed frames face oppositely, the sliding frames in each group of fixed frames move in opposite directions, the moving directions of two adjacent output rods are opposite, the two adjacent plungers achieve the purpose of continuously and alternately discharging, seamless connection is achieved when the motor rotates at constant speed, and the conveying speed of each cylinder is also constant speed, so that the purpose of uniform conveying of the reciprocating pump is achieved;

when the screw rod is rotated to enable the compression rod to move downwards, the extrusion inclined plane extrudes the compression ring and the sliding block, at the moment, the friction ring is separated from the fixed disc, the shaft sleeve loses power, the half gear is stopped, meanwhile, the friction plate is attached to the sliding frame, the sliding frame is locked, the adjustment of the running number of the plunger is achieved, the push-pull rod moves along with the output rod, so that the piston column moves, the purpose of sucking and outputting materials is achieved, the number of moving groups of the plunger is changed, the purpose of adjusting the connection number of the pump cylinder is indirectly achieved, the adjustment of the flow under the condition that the rotating speed of the motor is unchanged is achieved, meanwhile, the output condition can also accurately control the output flow by changing the input rotating speed of the motor, at the moment, the upper limit and lower limit of the flow adjustment are changed by adjusting the number of the moving plunger, and the flow control range and the accuracy are improved;

the push-pull rod moves along with the output rod, so that the piston rod moves to achieve the purposes of sucking and outputting materials, solid particles are contained in the materials to be sucked and conveyed, at the moment, the same liquid medium as the materials to be conveyed is injected into the pressure cavity through the medium pipe, so that the pressure in the pressure cavity is higher than the pressure in the pump cylinder, the abrasion of the piston rod caused by the solid particles entering the pressure cavity is avoided, after the piston is stopped, the locking bolt is unscrewed, the end cover is detached, the push-pull rod slides along the output rod through the storage groove, the piston rod is pulled out of the sealing cylinder, and the worn piston rod is convenient to replace and convenient to use;

the multiple pump cylinders are arranged at intervals, gaps are reserved between the multiple pump cylinders, the split type structure is adopted, the mutual influence of the pump cylinders in the self-heating expansion process is avoided, the medium conveying is avoided, the cooling cavity is located at the outer side of the sealing sleeve, the cooling water circulation is provided through the water cooling pipe, the sliding friction heat of the sealing sleeve attached to the piston column is cooled by water, and the thermal expansion is avoided.

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 schematic diagram of the structure of the present invention.

Fig. 2 is a schematic view of a partial cross-sectional structure of the present invention.

Fig. 3 is an enlarged schematic view of the structure of fig. 2 a according to the present invention.

Fig. 4 is an enlarged view of the structure of fig. 3 at C according to the present invention.

Fig. 5 is an enlarged view of the structure of fig. 4 at D according to the present invention.

FIG. 6 is a schematic diagram of a distribution structure of multiple groups of fixing frames according to the present invention.

Fig. 7 is an enlarged view of the structure of fig. 2B according to the present invention.

In the figure: 1. a base; 2. a motor; 3. a speed reducer; 4. a transmission mechanism; 41. a fixed box; 42. a fixed frame; 43. a sliding frame; 44. a rack; 45. a rotating shaft; 46. a shaft sleeve; 47. a half gear; 48. a compression bar; 49. a clutch assembly; 491. a fixed plate; 492. a fixing ring; 493. a compression ring; 494. a slide bar; 495. a friction ring; 496. a first spring; 497. a storage chamber; 498. a friction plate; 499. a slide block; 4910. a second spring; 4911. extruding the inclined plane; 410. a screw; 411. an output lever; 5. a plunger; 51. a push-pull rod; 52. a storage groove; 53. a thread head; 54. a piston column; 6. sealing the cylinder; 61. sealing sleeve; 62. an end cap; 7. a pump cylinder; 8. a feeding pipe; 9. a discharge pipe; 10. a partition plate; 11. a pressure chamber; 12. a medium pipe; 13. a cooling chamber; 14. water cooling pipe

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.

Examples: as shown in fig. 1-7, the invention provides a reciprocating pump, which comprises a base 1, wherein a motor 2 is arranged on the base 1, an output shaft of the motor 2 is fixedly connected with an input shaft of a speed reducer 3, an output shaft of the speed reducer 3 is connected with a transmission mechanism 4 for material uniform speed conveying and flow control, a plurality of sealing cylinders 6 are arranged on the base 1, plungers 5 are slidably clamped in the sealing cylinders 6, the plungers 5 are connected with the transmission mechanism 4, one ends of the sealing cylinders 6, far away from the transmission mechanism 4, are fixedly connected with pump cylinders 7, one ends of the pump cylinders 7 are fixedly sleeved with a material inlet pipe 8, and the other ends of the pump cylinders 7 are fixedly sleeved with a material outlet pipe 9.

Through above-mentioned technical scheme, carry out uniform velocity reciprocating motion to plunger 5 through drive mechanism 4 to make the material transport flow of pumping in the pump cylinder 7 keep even, reach even purpose of carrying, and adjust the quantity of moving plunger 5 through drive mechanism 4, indirectly reached the purpose of adjusting pump cylinder 7 connection quantity, realize the regulation of flow size under the unchangeable condition of motor rotational speed, simultaneously, the condition of material output also can be through changing motor input rotational speed and come accurate control output flow, the upper and lower limit change of flow regulation is realized in the regulation of the plunger 5 quantity of motion this moment, make flow control scope and precision all obtain improving, it is convenient to use.

Further, the check valves are all installed to the one end that pump jar 7 is close to pan feeding pipe 8 and discharging pipe 9, all fixed mounting has baffle 10 in the pan feeding pipe 8 inner chamber between two adjacent pump jars 7, has fixedly cup jointed the check valve on the baffle 10, and the feed inlet of pan feeding pipe 8 is opposite with the discharge gate direction of discharging pipe 9, and fixed mounting has the manometer on the outer wall that discharging pipe 9 is close to the discharge gate.

Through above-mentioned technical scheme, through the check valve at pump jar 7 both ends, guarantee that the material flows in from pan feeding pipe 8 and flows from discharging pipe 9, through the setting of baffle 10, all follow the one side extraction material that is close to the pan feeding pipe 8 entry when making every pump jar 7 suction, when avoiding keeping away from the plunger 5 of pan feeding pipe 8 entry to shut down, the pump jar 7 that is close to pan feeding pipe 8 entry one side is kept away from the material of the one end inner chamber of entry with pan feeding pipe 8, when guaranteeing every pump jar 7 operation, all be full of the material in the pan feeding pipe 8 in the baffle 10 that pump jar 7 was located, thereby inhale the material requirement when guaranteeing the department, improve flow uniformity, a plurality of pump jar 7 interval arrangements, there is the clearance each other, split type structure avoids the respective thermal expansion in-process of pump jar 7 to influence each other, avoid influencing the medium and carry.

Further, the drive mechanism 4 includes the fixed box 41, fixed box 41 fixed mounting is on base 1, a plurality of fixed frames 42 of fixed mounting between the inner wall of fixed box 41, all sliding joint has sliding frame 43 in the fixed frame 42, the top inner wall and the bottom inner wall of sliding frame 43 all fixed mounting have rack 44, rotating shaft 45 has been cup jointed between the both sides of fixed box 41, the one end of pivot 45 runs through fixed box 41 and the output shaft of fixed connection speed reducer 3, it has axle sleeve 46 to rotate on the fixed frame 42, half gear 47 has been cup jointed on the axle sleeve 46 of sliding frame 43 inner chamber department, half gear 47 meshing rack 44, rotating shaft 45 runs through a plurality of axle sleeve 46, the top of fixed frame 42 is equipped with depression bar 48, be equipped with clutch pack 49 between depression bar 48 and the axle sleeve 46, the top of fixed box 41 has screw 410 through the helicitic texture cup joint, the top middle part of the top surface of the bottom rotation joint depression bar 48 of screw 410, one side outer wall fixed connection output rod 411 of sliding frame 43, the output rod 411 runs through fixed box 41 and connects plunger 5, the inner chamber of fixed box 41 is equipped with multiunit fixed frame 42, the quantity of fixed frame 42 is two, the quantity of every fixed frame 42 is two, two sets of fixed frame 42, the inner chamber of two fixed frame 42 of fixed frame 45 of opposite direction opposite to each other side of the top of rotation axis 45, the top of rotation 45 is equipped with depression bar 48, the top of depression bar 45 is equipped with the guide ring 45 is fixed with the top of depression bar 46, the top of the fixed axle 45 is coincident with the top of depression bar 45, the top of the fixed axle 46, and the top of the depression bar is mounted.

Through the above technical scheme, the connection and disconnection between the shaft sleeve 46 and the rotating shaft 45 are controlled through the clutch assembly 49, when the shaft sleeve 46 is connected with the rotating shaft 45, the half gears 47 continuously rotate along with the rotating shaft 45, then the half gears 47 alternately engage racks 44 on two sides of the sliding frame 43, uniform reciprocating sliding of the sliding frame 43 is realized, and the half gears 47 in each group of fixed frames 42 face opposite directions, then the moving directions of the sliding frames 43 in each group of fixed frames 42 are opposite, so that the moving directions of two adjacent output rods 411 are opposite, then the two adjacent plungers 5 realize the purpose of one material drawing and one discharging, the purpose of continuous alternate discharging is realized, in addition, seamless connection is realized during discharging, the uniform conveying purpose of the reciprocating pump is realized, and when the shaft sleeve 46 is disconnected with the rotating shaft 45, the half gears 47 in the same group of fixed frames 42 stop rotating simultaneously, thereby the purposes of flow adjustment are realized according to the requirement of adjusting the number of the running plungers 5 groups.

Further, the clutch assembly 49 comprises a fixed disk 491, the rotating shafts 45 at the two ends of the shaft sleeve 46 are fixedly sleeved with the fixed disk 491, the outer wall of one end of the shaft sleeve 46 close to the fixed disk 491 is fixedly provided with a fixed ring 492, the shaft sleeve 46 between the fixed ring 492 and the outer wall of the fixed frame 42 is slidably sleeved with a compression ring 493, the fixed ring 492 is slidably penetrated with a plurality of sliding rods 494, one end of the sliding rod 494 is fixedly connected with the compression ring 493, the other end of the sliding rod 494 is fixedly connected with a friction ring 495, the friction ring 495 is attached to the fixed disk 491, the sliding rod 494 between the friction ring 495 and the fixed ring 492 is sleeved with a first spring 496, the tops of the inner walls at the two sides of the fixed frame 42 are respectively provided with a containing cavity 497, the inside of the containing cavity 498 is slidably clamped with a friction plate 498, the friction disc 498 is fixedly arranged on one side far away from the sliding frame 43, the sliding block 499 penetrates through the outer wall of the fixed frame 42 in a sliding mode, a second spring 4910 is arranged between the sliding block 499 and the outer wall of the fixed frame 42, an extrusion inclined surface 4911 is arranged between the inner wall of the pressing rod 48 and the outer wall of the sliding block 499 and the pressing ring 493, a limiting block is fixedly arranged on one side outer wall of the sliding block 499 close to the extrusion inclined surface 4911, a second spring 4910 is sleeved on the sliding block 499 between the limiting block and the outer wall of the fixed frame 42, the first spring 496 and the second spring 4910 are both in a compressed state, two pairs of extrusion rods are integrally formed at the bottom of the pressing rod 48, the extrusion inclined surface 4911 is arranged on one side of the extrusion rod close to the fixed frame 42, and the vertical projection length of the extrusion inclined surface 4911 is larger than the difference between the depth of the storage cavity 497 and the thickness of the friction disc 498.

Through the above technical scheme, the screw 410 is rotated to control the up and down of the compression bar 48, when the compression bar 48 moves up, the extrusion inclined surface 4911 is separated at this time, the first spring 496 pushes the friction ring 495 to be attached to the fixed disc 491, meanwhile, the second spring 4910 pushes the sliding block 499, so that the friction plate 498 is separated from the outer wall of the sliding frame 43, the friction ring 495 follows the fixed disc 491 to rotate through friction force, so that the shaft sleeve 46 is driven to rotate, the half gear 47 rotates, the sliding frame 43 reciprocates, when the screw 410 rotates to enable the compression bar 48 to move down, the extrusion inclined surface 4911 extrudes the compression ring 493 and the sliding block 499, at this time, the friction ring 495 is separated from the fixed disc 491, the shaft sleeve 46 loses power, meanwhile, the friction plate 498 is attached to the sliding frame 43, so that the sliding frame 43 is locked, and the adjustment of the running quantity of the plunger 5 is achieved.

Further, the plunger 5 comprises a push-pull rod 51, a storage groove 52 is formed in one end of the push-pull rod 51, one end of the output rod 411, far away from the sliding frame 43, is clamped with the storage groove 52, a locking bolt is sleeved on the push-pull rod 51 in a threaded mode, the locking bolt is clamped with the output rod 411, a threaded head 53 is integrally formed in the end face of the other end of the push-pull rod 51, the threaded head 53 is connected with a piston column 54 in a threaded mode, the piston column 54 is clamped with a sealing cylinder 6 in a clamping mode, a sealing sleeve 61 is fixedly sleeved on the inner wall of one end, close to the fixed box 41, of the sealing cylinder 6, the outer wall of the piston column 54 is tightly attached to the sealing sleeve 61, an end cover 62 is mounted on the end face of the sealing cylinder 6 through a flange, the push-pull rod 51 penetrates through the end cover 62, a pressure cavity 11 is formed between the piston column 54 and the inner wall of one end, far away from the push-pull rod 51, of the sealing cylinder 6, a medium pipe 12 is fixedly sleeved on the sealing cylinder 6, the medium pipe 12 is communicated with the pressure cavity 11, a cooling cavity 13 is formed in the inner wall of one end, far away from the pump cylinder 7, of the sealing cylinder 6, and two water cooling pipes 14 are fixedly sleeved on the sealing cylinder 6.

Through the technical scheme, the push-pull rod 51 moves along the output rod 411, so that the piston rod 54 moves, the purpose of sucking and outputting materials is achieved, solid particles are contained in some materials, at the moment, liquid medium with the same conveying materials (pure liquid after the solid particles are taken out by conveying the materials) is injected into the pressure cavity 11 through the medium pipe 12, the pressure in the pressure cavity 11 is higher than the pressure in the pump cylinder 7, the solid particles are prevented from entering the pressure cavity 11 to cause abrasion of the piston rod 54, after the plunger 5 stops, the locking bolt is unscrewed, the end cover 62 is detached, so that the push-pull rod 51 slides along the output rod 411 through the containing groove 52, the piston rod 54 is pulled out of the sealing cylinder 6, the worn piston rod 54 is convenient to replace, the cooling cavity 13 is positioned outside the sealing sleeve 61, cooling water circulation is provided through the water cooling pipe 14, the sliding friction heat of the piston rod 54 is prevented from being adhered to the sealing sleeve 61, and the thermal expansion is avoided.

Working principle: the screw 410 is rotated to control the up and down of the compression bar 48, when the compression bar 48 moves upwards, the extrusion inclined plane 4911 is separated, the first spring 496 pushes the friction ring 495 to be attached to the fixed disc 491, meanwhile, the second spring 4910 pushes the sliding block 499, the friction plate 498 is separated from the outer wall of the sliding frame 43, the friction ring 495 follows the fixed disc 491 to rotate through friction force, the shaft sleeve 46 is driven to rotate, the half gear 47 rotates, the half gear 47 alternately engages the racks 44 on two sides of the sliding frame 43 to realize uniform reciprocating sliding of the sliding frame 43, the half gears 47 in each group of the fixed frames 42 face opposite directions, the sliding frame 43 in each group of the fixed frames 42 moves in opposite directions, the movement directions of the two adjacent output rods 411 are opposite, the two adjacent plungers 5 realize the purposes of pumping and discharging continuously and alternately, and the purpose of uniform conveying of the reciprocating pump is realized in a seamless connection during discharging, when the screw 410 is rotated to enable the compression bar 48 to move downwards, the extrusion inclined surface 4911 extrudes the compression ring 493 and the sliding block 499, at the moment, the friction ring 495 is separated from the fixed disc 491, the shaft sleeve 46 loses power, the half gear 47 is stopped, meanwhile, the friction plate 498 is attached to the sliding frame 43, the sliding frame 43 is locked, the running quantity of the plunger 5 is adjusted, the push-pull rod 51 moves along with the output rod 411, thereby enabling the piston column 54 to move, the purposes of sucking and outputting materials are achieved, uniform flow conveying is achieved through uniform flow conveying, the moving group number of the plunger 5 is changed, the purpose of adjusting the connecting quantity of the pump cylinder 7 is indirectly achieved, the flow quantity adjustment is achieved under the condition that the motor rotating speed is unchanged, meanwhile, the output flow quantity can be accurately controlled through changing the motor input rotating speed, at the moment, the quantity adjustment of the moving plunger 5 realizes the upper limit and lower limit change of flow adjustment, the flow control range and the accuracy are improved, the push-pull rod 51 moves along the output rod 411, so that the piston rod 54 moves, the purpose of sucking and outputting materials is achieved, solid particles are contained in some materials in the sucking and conveying materials, at the moment, liquid media which are the same as the conveying materials are injected into the pressure cavity 11 through the medium pipe 12, the pressure in the pressure cavity 11 is higher than the pressure in the pump cylinder 7, the solid particles are prevented from entering the pressure cavity 11 to cause abrasion of the piston rod 54, after the plunger 5 stops, the locking bolt is unscrewed, the end cover 62 is detached, the push-pull rod 51 slides along the output rod 411 through the storage groove 52, the piston rod 54 is pulled out of the sealing cylinder 6, and the worn piston rod 54 is convenient to replace.

It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. A reciprocating pump comprising a base, characterized in that: the base is provided with a motor, an output shaft of the motor is fixedly connected with an input shaft of a speed reducer, an output shaft of the speed reducer is connected with a transmission mechanism, the base is provided with a plurality of sealing cylinders, plungers are slidably clamped in the sealing cylinders, the plunger is connected with a transmission mechanism for conveying materials at a constant speed and controlling flow, one end of the sealing cylinder, which is far away from the transmission mechanism, is fixedly connected with a pump cylinder, one end of the pump cylinder is fixedly sleeved with a material pipe, and the other end of the pump cylinder is fixedly sleeved with a material discharging pipe;

the transmission mechanism comprises a fixed box, the fixed box is fixedly arranged on a base, a plurality of fixed frames are fixedly arranged between the inner walls of the fixed box, sliding frames are fixedly clamped in the fixed frames, racks are fixedly arranged on the inner walls of the top and the bottom of the sliding frames, a rotating shaft is rotatably sleeved between the two sides of the fixed box, one end of the rotating shaft penetrates through the fixed box and is fixedly connected with an output shaft of the speed reducer, a shaft sleeve penetrates through the fixed frame in a rotating manner, a half gear is fixedly sleeved on the shaft sleeve at the inner cavity of the sliding frame, the racks are meshed with the half gear, the rotating shaft penetrates through a plurality of shaft sleeves, a pressing rod is arranged at the top of the fixed frame, a screw rod is sleeved at the top of the fixed box through a threaded structure, the bottom of the screw rod is rotatably clamped in the middle of the top surface of the pressing rod, an output rod is fixedly connected with the outer wall of one side of the sliding frame, and penetrates through the fixed box and is connected with a plunger;

the clutch pack comprises a fixed disc, the fixed disc has all been fixedly sleeved in the pivot at axle sleeve both ends, the axle sleeve is close to the one end outer wall fixed mounting of fixed disc and has had the solid fixed ring, gu slide sleeve has cup jointed the clamping ring on the axle sleeve between gu fixed ring and the fixed frame outer wall, it has a plurality of slide bars to slide on the solid fixed ring, the one end fixed connection clamping ring of slide bar, the other end fixed connection friction ring of slide bar, the friction ring can laminate the fixed disc, first spring has been cup jointed on the slide bar between friction ring and the solid fixed ring, accomodate the chamber has all been opened at the both sides inner wall top of fixed frame, accomodate the equal sliding joint in the intracavity and have the friction disc, one side fixed mounting that the sliding frame was kept away from to the friction disc has the slider, the slider slides and runs through the outer wall of fixed frame, and installs the second spring between slider and the fixed frame outer wall, extrusion inclined plane has been seted up between the inner wall and the slider of depression bar and the clamping ring.

2. The reciprocating pump of claim 1, wherein one ends of the pump cylinders, which are close to the feeding pipe and the discharging pipe, are respectively provided with one-way valves, a baffle is fixedly arranged in the inner cavity of the feeding pipe between two adjacent pump cylinders, the baffle is fixedly sleeved with the one-way valves, the feeding hole of the feeding pipe is opposite to the discharging hole of the discharging pipe, and a pressure gauge is fixedly arranged on the outer wall of the discharging pipe, which is close to the discharging hole.

3. A reciprocating pump as claimed in claim 1, wherein the inner cavity of the fixed casing is provided with a plurality of groups of fixed frames, the number of each group of fixed frames is two, the half gears in the inner cavities of the two fixed frames of each group are opposite in orientation, and the top of each group of fixed frames is provided with a compression bar.

4. A reciprocating pump as claimed in claim 3, wherein the diameter of the shaft sleeve is larger than that of the rotary shaft, the shaft sleeve coincides with the axis of the rotary shaft, a limit ring is fixedly arranged on the outer wall of the top of the screw rod, guide rods are fixedly arranged on the tops of the compression rods on two sides of the screw rod, and the guide rods penetrate through the top of the fixed box in a sliding manner.

5. The reciprocating pump of claim 1, wherein a stopper is fixedly mounted on the outer wall of one side of the slider close to the extrusion inclined plane, a second spring is sleeved on the slider between the stopper and the outer wall of the fixed frame, and the first spring and the second spring are both in a compressed state.

6. The reciprocating pump of claim 1, wherein the plunger comprises a push-pull rod, one end of the push-pull rod is provided with a storage groove, one end of the output rod, which is far away from the sliding frame, is clamped with the storage groove, the push-pull rod is sheathed with a locking bolt in a threaded manner, the locking bolt is clamped with the output rod, the end face of the other end of the push-pull rod is integrally provided with a thread head, the thread head is in threaded connection with the piston column, and the piston column is clamped with the sealing cylinder.

7. The reciprocating pump of claim 6, wherein the sealing sleeve is fixedly sleeved on the inner wall of one end of the sealing cylinder, which is close to the fixed box, the outer wall of the piston column is tightly attached to the sealing sleeve, the end face of the sealing cylinder is provided with an end cover through a flange, the push-pull rod penetrates through the end cover, a pressure cavity is formed between the piston column and the inner wall of one end of the sealing cylinder, which is far away from the push-pull rod, a medium pipe is fixedly sleeved on the sealing cylinder, the medium pipe is communicated with the pressure cavity, a cooling cavity is formed in the inner wall of one end of the sealing cylinder, which is far away from the pump cylinder, and two water cooling pipes are fixedly sleeved on the sealing cylinder.