WO2024113535A1 - Reciprocating pump - Google Patents

Abstract

A reciprocating pump, comprising a base (1), wherein an electric motor (2) is mounted on the base (1); an output shaft of the electric motor (2) is fixedly connected to an input shaft of a speed reducer (3); an output shaft of the speed reducer (3) is connected to a transmission mechanism (4) which is configured to achieve constant-speed conveying and flow control of materials; a plurality of sealed cylinders (6) are mounted on the base (1); a plunger (5) is slidably snap-fitted in each sealed cylinder (6); the plungers (5) are connected to the transmission mechanism (4); the end of each sealed cylinder (6) away from the transmission mechanism (4) is fixedly connected to a pump cylinder (7); and one end of the pump cylinders (7) is fixedly connected to a feed pipe (8) in a sleeving manner, and the other end of the pump cylinders (7) is fixedly connected to a discharge pipe (9) in a sleeving manner.

Description

A reciprocating pump Technical Field

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

Background technique

A reciprocating pump is a positive displacement pump that uses the periodic change of the volume in the working chamber to transport liquids. It is widely used in various industries such as petroleum, chemical industry, water supply, thermal power, nuclear industry, pharmaceuticals, and food. It has strong professional matching and can meet the requirements of different customers and different process conditions. The obvious disadvantage of the reciprocating pump is that if the reciprocating motion of the piston is transformed by a crank mechanism with constant rotation speed, its speed change obeys the law of the sine curve, and the movement speed of the piston also follows the law of the sine curve, resulting in the material speed conveyed by the piston not being uniform, and the material conveying speed is uneven. , there is a situation where the flow rate is sometimes large and sometimes small. The current reciprocating pump multi-cylinder pump distributes the relative positions of the cranks of each cylinder equidistantly, which can make the flow rate more uniform, but this design can only alleviate the problem of uneven flow rate, but still cannot achieve the purpose of uniform speed delivery. In addition, the pump cylinder of the current reciprocating pump is fixed, and the flow rate of the reciprocating pump is determined by the input motor speed of the crank mechanism. Changing the motor speed can change the flow rate and flow velocity, but because the flow rate is uneven during delivery by the crank mechanism, it is difficult to accurately regulate the flow rate. In response to the above problems, the inventor proposes a reciprocating pump to solve the above problems.

Summary of the invention

In order to solve the problem that the instantaneous flow of the reciprocating pump currently used is equal to the sum of the instantaneous flow of each cylinder at the same moment, as long as the relative position of the cranks of each cylinder is appropriate, the flow can be made more uniform, but this design can only alleviate the problem of uneven flow, but still cannot achieve the purpose of uniform speed delivery, and the pump cylinder of the current reciprocating pump is fixed, the flow of the reciprocating pump is determined by the input motor speed of the crank mechanism, changing the motor speed can change the flow rate, but because the flow is uneven when the crank mechanism is delivered, it leads to the problem that the flow regulation control is difficult to be accurate; the purpose of the present invention is to provide a reciprocating pump.

In order to solve the above technical problems, the present invention adopts the following technical solution: a reciprocating pump comprises a base, a motor is mounted on the base, and the output shaft of the motor is fixedly connected to the input shaft of the reducer. The output shaft of the reducer is connected to a transmission mechanism for uniform material conveying and flow control. A plurality of sealing cylinders are installed on the base. Plungers are slidably engaged in the sealing cylinders. The plungers are connected to the transmission mechanism. One end of the sealing cylinder away from the transmission mechanism is fixedly connected to a pump cylinder. One end of the pump cylinder is fixedly sleeved into a material pipe, and the other end of the pump cylinder is fixedly sleeved into a discharge pipe.

In a preferred implementation case, a one-way valve is installed at one end of the pump cylinder close to the inlet pipe and the outlet pipe, a partition is fixedly installed in the inner cavity of the inlet pipe between two adjacent pump cylinders, a one-way valve is fixedly sleeved on the partition, the feed port of the inlet pipe and the outlet port of the outlet pipe are in opposite directions, and a pressure gauge is fixedly installed on the outer wall of the outlet pipe close to the outlet.

The transmission mechanism is a kind of transmission mechanism, and its first is a kind of rotation of the transmission mechanism, and its second is a kind of rotation of the transmission mechanism, and its second is a kind of rotation of the transmission mechanism.

In a preferred implementation example, the inner cavity of the fixed box is provided with a plurality of groups of fixed frames, each group of fixed frames has two fixed frames, the half gears in the inner cavities of the two fixed frames in each group face opposite directions, and a pressure rod is provided on the top of each group of fixed frames.

In a preferred implementation case, the diameter of the sleeve is larger than the shaft, and the axis of the sleeve coincides with that of the shaft, a limiting ring is fixedly provided on the top outer wall of the screw, guide rods are fixedly installed on the tops of the pressure rods on both sides of the screw, and the guide rods slide through the top of the fixed box.

In a preferred embodiment, the clutch assembly includes a fixed disk, the rotating shafts at both ends of the sleeve are fixedly sleeved with fixed disks, the outer wall of the sleeve close to the fixed disk is fixedly mounted with a fixed ring, the sleeve between the fixed ring and the outer wall of the fixed frame is slidably sleeved with a pressure ring, and the fixed ring is slidably sleeved with a pressure ring. A plurality of sliding rods are passed through, one end of the sliding rod is fixedly connected to a pressure ring, the other end of the sliding rod is fixedly connected to a friction ring, the friction ring fits a fixed plate, a first spring is sleeved on the sliding rod between the friction ring and the fixed ring, a storage cavity is opened on the top of the inner walls on both sides of the fixed frame, a friction plate is slidably engaged in the storage cavity, a sliding block is fixedly installed on the side of the friction plate away from the sliding frame, the sliding block slides through the outer wall of the fixed frame, a second spring is installed between the sliding block and the outer wall of the fixed frame, and an extrusion slope is opened between the inner wall of the pressure rod, the sliding block and the pressure ring.

In a preferred implementation example, a limit block is fixedly installed on the outer wall of one side of the slider close to the extrusion slope, a second spring is sleeved on the slider between the limit 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 implementation example, two pairs of extrusion rods are integrally formed at the bottom of the pressure rod, and an extrusion slope is provided on one side of the extrusion rod close to the fixed frame, and the vertical projection length of the extrusion slope is greater than the difference between the depth of the storage cavity and the thickness of the friction plate.

In a preferred implementation case, the plunger includes a push-pull rod, one end of which is provided with a receiving groove, the end of the output rod away from the sliding frame is clamped in the receiving groove, and a locking bolt is threadedly sleeved on the push-pull rod, the locking bolt clamps the output rod, and the other end face of the push-pull rod is integrally formed with a threaded head, the threaded head is threadedly connected to the piston column, and the piston column is clamped in the sealing cylinder.

In a preferred implementation case, a sealing sleeve is fixedly sleeved on the inner wall of one end of the sealing cylinder close to the fixed box, the outer wall of the piston column tightly fits the sealing sleeve, the end face of the sealing cylinder is installed with an end cover through a flange, the push-pull rod passes through the end cover, a pressure chamber is formed between the piston column and the inner wall of one end of the sealing cylinder away from the push-pull rod, a medium pipe is fixedly sleeved on the sealing cylinder, the medium pipe is connected to the pressure chamber, a cooling chamber is opened on the inner wall of one end of the sealing cylinder away from the pump cylinder, and two water-cooling pipes are fixedly sleeved on the sealing cylinder.

Compared with the prior art, the present invention has the following beneficial effects:

1. Turn the screw to control the up and down movement of the pressure rod. When the pressure rod moves up, the extrusion slope separates, and the first spring pushes the friction ring to fit the fixed plate. At the same time, the second spring pushes the slider to make the friction plate When the gears are separated from the outer wall of the sliding frame, the friction ring rotates with the fixed plate through friction, thereby driving the shaft sleeve to rotate, and the half gears rotate, and the half gears alternately mesh with the racks on both sides of the sliding frame to achieve uniform reciprocating sliding of the sliding frame. The half gears in each group of fixed frames face opposite directions, and the sliding frames in each group of fixed frames move in opposite directions, so that the adjacent two output rods move in opposite directions, and the adjacent two plungers achieve the purpose of one drawing material and one discharging material, achieving the purpose of continuous alternating discharging, and seamless connection during discharging. When the motor rotates at a uniform speed, the sliding frame slides back and forth at a uniform speed, and the feeding speed of each cylinder is also constant, achieving the purpose of uniform delivery of the reciprocating pump;

2. When the screw is rotated to move the pressure rod downward, the extrusion bevel squeezes the pressure ring and the slider. At this time, the friction ring is separated from the fixed plate, the sleeve loses power, and the half gear stops. At the same time, the friction plate fits the sliding frame, so that the sliding frame is locked, so as to adjust the number of plunger operations. The push-pull rod moves with the output rod, so that the piston column moves, so as to achieve the purpose of suction and output of materials. By changing the number of movement groups of the plunger, the purpose of adjusting the number of pump cylinder connections is indirectly achieved, and the flow rate is adjusted without changing the motor speed. At the same time, the output situation can also be accurately controlled by changing the motor input speed. At this time, the number of moving plungers is adjusted to achieve the change of the upper and lower limits of flow regulation, so that the flow control range and accuracy are improved;

3. The push-pull rod moves with the output rod, so that the piston column moves to achieve the purpose of suction and output of materials. In the suction and delivery of materials, some materials contain solid particles. At this time, the liquid medium with the same conveying material is injected into the pressure chamber through the medium pipe, so that the pressure in the pressure chamber is greater than the pressure in the pump cylinder, avoiding solid particles from entering the pressure chamber and causing wear of the piston column. After the plunger stops, the locking bolt is unscrewed and the end cover is removed, so that the push-pull rod slides along the output rod through the storage groove, and the piston column is pulled out of the sealing cylinder, which is convenient for replacing the worn piston column and is easy to use.

4. Multiple pump cylinders are arranged at intervals with gaps between them. The split structure avoids mutual influence during the thermal expansion of the pump cylinders and affects the medium transportation. The cooling chamber is located outside the sealing sleeve. The cooling water circulation is provided through the water cooling pipe. The friction heat of the piston rod sliding against the sealing sleeve is cooled by water to avoid thermal expansion.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the structure of the present invention.

FIG. 2 is a schematic diagram of a partial cross-sectional structure of the present invention.

FIG. 3 is a schematic diagram of the enlarged structure of point A in FIG. 2 of the present invention.

FIG. 4 is an enlarged structural schematic diagram of point C in FIG. 3 of the present invention.

FIG. 5 is a schematic diagram of the enlarged structure of point D in FIG. 4 of the present invention.

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

FIG. 7 is an enlarged structural schematic diagram of point B in FIG. 2 of the present invention.

In the figure: 1, base; 2, motor; 3, reducer; 4, transmission mechanism; 41, fixed box; 42, fixed frame; 43, sliding frame; 44, rack; 45, rotating shaft; 46, bushing; 47, half gear; 48, pressure rod; 49, clutch assembly; 491, fixed plate; 492, fixed ring; 493, pressure ring; 494, sliding rod; 495, friction ring; 496, first spring; 497, storage chamber; 498, friction Wipe; 499, slider; 4910, second spring; 4911, extrusion slope; 410, screw; 411, output rod; 5, plunger; 51, push-pull rod; 52, storage groove; 53, threaded head; 54, piston column; 6, sealing cylinder; 61, sealing sleeve; 62, end cover; 7, pump cylinder; 8, feed pipe; 9, discharge pipe; 10, partition; 11, pressure chamber; 12, medium pipe; 13, cooling chamber; 14, water cooling pipe

Detailed ways

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Embodiment: As shown in Figures 1-7, the present invention provides a reciprocating pump, including a base 1, on which a motor 2 is mounted, the output shaft of the motor 2 is fixedly connected to the input shaft of a reducer 3, and the output shaft of the reducer 3 is fixedly connected to the input shaft of the reducer 3. The output shaft is connected to a transmission mechanism 4 for uniform material conveying and flow control. A plurality of sealing cylinders 6 are installed on the base 1. Plunger 5 is slidably engaged in the sealing cylinders 6. The plunger 5 is connected to the transmission mechanism 4. One end of the sealing cylinder 6 away from the transmission mechanism 4 is fixedly connected to the pump cylinder 7. One end of the pump cylinder 7 is fixedly sleeved into the material pipe 8, and the other end of the pump cylinder 7 is fixedly sleeved into the discharge pipe 9.

Through the above technical scheme, the piston 5 is subjected to uniform reciprocating motion through the transmission mechanism 4, so that the material conveying flow rate of the material sucked in the pump cylinder 7 is kept uniform, so as to achieve the purpose of uniform conveying, and the number of moving pistons 5 is adjusted by the transmission mechanism 4, so as to indirectly achieve the purpose of adjusting the number of connections of the pump cylinder 7, so as to realize the adjustment of the flow size under the condition of unchanged motor speed. At the same time, the material output situation can also be precisely controlled by changing the motor input speed. At this time, the number of moving pistons 5 is adjusted to realize the change of the upper and lower limits of flow regulation, so that the flow control range and accuracy are improved, and it is convenient to use.

Furthermore, a one-way valve is installed at one end of the pump cylinder 7 near the inlet pipe 8 and the outlet pipe 9, and a partition 10 is fixedly installed in the inner cavity of the inlet pipe 8 between two adjacent pump cylinders 7. A one-way valve is fixedly sleeved on the partition 10. The inlet of the inlet pipe 8 and the outlet of the outlet pipe 9 are in opposite directions, and a pressure gauge is fixedly installed on the outer wall of the outlet pipe 9 near the outlet.

Through the above technical scheme, the one-way valves at both ends of the pump cylinder 7 are used to ensure that the material flows into the feed pipe 8 and flows out of the discharge pipe 9. Through the setting of the partition 10, each pump cylinder 7 draws material from the side close to the inlet of the feed pipe 8 during suction, so as to avoid the pump cylinder 7 close to the inlet of the feed pipe 8 sucking away the material in the inner cavity of the end of the feed pipe 8 away from the inlet when the plunger 5 far away from the inlet of the feed pipe 8 stops operating. It is ensured that when each pump cylinder 7 is in operation, the feed pipe 8 in the partition 10 where the pump cylinder 7 is located is full of material, thereby ensuring the suction requirements at the time and improving the uniformity of the flow rate. Multiple pump cylinders 7 are arranged at intervals with gaps between each other, and the split structure avoids mutual influence during the thermal expansion of the pump cylinders 7, thereby avoiding affecting the medium transportation.

Furthermore, the transmission mechanism 4 includes a fixed box 41, which is fixedly mounted on the base 1, and a plurality of fixed frames 42 are fixedly mounted between the inner walls of the fixed box 41, and a sliding frame 43 is slidably connected in the fixed frame 42, and a rack 44 is fixedly mounted on the top inner wall and the bottom inner wall of the sliding frame 43. A rotating shaft 45 is rotatably sleeved between the two sides, one end of the rotating shaft 45 passes through the fixed box 41 and is fixedly connected to the output shaft of the reducer 3, a sleeve 46 is rotatably penetrated on the fixed frame 42, a half gear 47 is fixedly sleeved on the sleeve 46 at the inner cavity of the sliding frame 43, the half gear 47 meshes with the rack 44, the rotating shaft 45 passes through a plurality of sleeves 46, a pressure rod 48 is provided on the top of the fixed frame 42, a clutch assembly 49 is provided between the pressure rod 48 and the sleeve 46, a screw 410 is sleeved on the top of the fixed box 41 through a threaded structure, the bottom of the screw 410 is rotatably engaged with the middle part of the top surface of the pressure rod 48, and one side of the sliding frame 43 is externally The wall is fixedly connected to the output rod 411, the output rod 411 passes through the fixed box 41 and is connected to the plunger 5. The inner cavity of the fixed box 41 is provided with multiple groups of fixed frames 42, and the number of each group of fixed frames 42 is two. The half gears 47 in the inner cavity of the two fixed frames 42 in each group are in opposite directions. A pressure rod 48 is provided on the top of each group of fixed frames 42. The diameter of the sleeve 46 is larger than the rotating shaft 45, and the axis of the sleeve 46 coincides with the axis of the rotating shaft 45. A limiting ring is fixedly provided on the outer wall of the top of the screw 410. Guide rods are fixedly installed on the tops of the pressure rods 48 on both sides of the screw 410, and the guide rods slide through the top of the fixed box 41.

Through the above technical scheme, the connection and disconnection between the sleeve 46 and the rotating shaft 45 are controlled by the clutch assembly 49. When the sleeve 46 is connected to the rotating shaft 45, the half gear 47 rotates continuously following the rotating shaft 45, and the half gear 47 alternately meshes with the racks 44 on both sides of the sliding frame 43 to achieve uniform reciprocating sliding of the sliding frame 43. The half gears 47 in each group of fixed frames 42 face opposite directions, and the sliding frames 43 in each group of fixed frames 42 move in opposite directions, so that the adjacent two output rods 411 move in opposite directions, and the adjacent two plungers 5 achieve the purpose of one drawing and one discharging, achieving the purpose of continuous alternating discharging, and seamless connection during discharging, achieving the purpose of uniform conveying of the reciprocating pump, and when the sleeve 46 is disconnected from the rotating shaft 45, the half gears 47 in the same group of fixed frames 42 stop rotating at the same time, so that the number of running plunger 5 groups is adjusted according to needs to achieve the purpose of flow regulation.

Furthermore, the clutch assembly 49 includes a fixed disk 491, and the rotating shaft 45 at both ends of the shaft sleeve 46 is fixedly sleeved with a fixed disk 491, and the outer wall of the shaft sleeve 46 close to the fixed disk 491 is fixedly installed with a fixed ring 492, and a pressure ring 493 is slidably sleeved on the shaft sleeve 46 between the fixed ring 492 and the outer wall of the fixed frame 42, and a plurality of slide rods 494 are slidably penetrated on the fixed ring 492, one end of the slide rod 494 is fixedly connected to the pressure ring 493, and the other end of the slide rod 494 is fixedly connected to the friction ring 495, and the friction ring 495 is attached to the fixed disk 491, and the slide rod 494 between the friction ring 495 and the fixed ring 492 is sleeved with a first spring 496, and the inner wall tops on both sides of the fixed frame 42 are fixed. A storage cavity 497 is provided in each part, and a friction plate 498 is slidably engaged in the storage cavity 497. A slider 499 is fixedly installed on the side of the friction plate 498 away from the sliding frame 43. The slider 499 slides through the outer wall of the fixed frame 42, and a second spring 4910 is installed between the slider 499 and the outer wall of the fixed frame 42. An extrusion slope 4911 is provided between the inner wall of the pressure rod 48 and the slider 499 and the pressure ring 493. A limiting block is fixedly installed on the outer wall of the slider 499 close to the extrusion slope 4911, and a second spring 4910 is sleeved on the slider 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 pressure rod 48, and an extrusion slope 4911 is provided on the side of the extrusion rod close to the fixed frame 42. The vertical projection length of the extrusion slope 4911 is greater than the difference between the depth of the storage cavity 497 and the thickness of the friction plate 498.

By means of the above technical scheme, the screw rod 410 is rotated to control the up and down movement of the pressure rod 48. When the pressure rod 48 moves upward, the extrusion inclined surface 4911 is separated, and the first spring 496 pushes the friction ring 495 to fit the fixed disk 491. At the same time, the second spring 4910 pushes the slider 499, so that the friction plate 498 is separated from the outer wall of the sliding frame 43. The friction ring 495 rotates with the fixed disk 491 through the friction force, thereby driving the shaft sleeve 46 to rotate, and the half gear 47 rotates, and the sliding frame 43 reciprocates. When the screw rod 410 is rotated to make the pressure rod 48 move downward, the extrusion inclined surface 4911 squeezes the pressure ring 493 and the slider 499. At this time, the friction ring 495 is separated from the fixed disk 491, and the shaft sleeve 46 loses power. At the same time, the friction plate 498 fits the sliding frame 43, so that the sliding frame 43 is locked, so as to adjust the running quantity of the plunger 5.

Furthermore, the plunger 5 includes a push-pull rod 51, one end of which is provided with a receiving groove 52, the end of the output rod 411 away from the sliding frame 43 is clamped in the receiving groove 52, and a locking bolt is threadedly sleeved on the push-pull rod 51, the locking bolt clamps the output rod 411, and the other end face of the push-pull rod 51 is integrally formed with a threaded head 53, the threaded head 53 is threadedly connected to the piston column 54, the piston column 54 clamps the sealing cylinder 6, the inner wall of the end of the sealing cylinder 6 close to the fixed box 41 is fixedly sleeved with a sealing sleeve 61, the outer wall of the piston column 54 is tightly fitted with the sealing sleeve 61, the end face of the sealing cylinder 6 is installed with an end cover 62 through a flange, the push-pull rod 51 passes through the end cover 62, a pressure chamber 11 is formed between the piston column 54 and the inner wall of the end of the sealing cylinder 6 away from the push-pull rod 51, a medium pipe 12 is fixedly sleeved on the sealing cylinder 6, the medium pipe 12 is connected to the pressure chamber 11, and the sealing cylinder 6 is away from the pump cylinder 7 A cooling chamber 13 is formed in the inner wall of one end of the sealing cylinder 6, and two water cooling pipes 14 are fixedly sleeved on the sealing cylinder 6.

Through the above technical scheme, the push-pull rod 51 moves with the output rod 411, so that the piston column 54 moves to achieve the purpose of sucking and outputting materials. In the sucked and conveyed materials, some materials contain solid particles. At this time, the liquid medium (pure liquid after the solid particles are taken out of the conveying material) same as the conveying material is injected into the pressure chamber 11 through the medium pipe 12, so that the pressure in the pressure chamber 11 is greater than the pressure in the pump cylinder 7, avoiding solid particles from entering the pressure chamber 11 and causing wear of the piston column 54. After the plunger 5 stops, the locking bolt is unscrewed and the end cover 62 is removed, so that the push-pull rod 51 slides along the output rod 411 through the storage groove 52, and the piston column 54 is pulled out of the sealing cylinder 6, which is convenient for replacing the worn piston column 54. It is easy to use. The cooling chamber 13 is located outside the sealing sleeve 61, and cooling water circulation is provided through the water cooling pipe 14. The friction heat of the piston column 54 sliding against the sealing sleeve 61 is cooled by water to avoid thermal expansion.

Working principle: Rotate the screw rod 410 to control the up and down movement of the pressure rod 48. When the pressure rod 48 moves up, the extrusion inclined surface 4911 separates, and the first spring 496 pushes the friction ring 495 to fit the fixed disk 491. At the same time, the second spring 4910 pushes the slider 499 to separate the friction plate 498 from the outer wall of the sliding frame 43. The friction ring 495 rotates with the fixed disk 491 through friction, thereby driving the shaft sleeve 46 to rotate, and the half gear 47 rotates. The half gear 47 alternately meshes with the racks 44 on both sides of the sliding frame 43 to achieve uniform reciprocating sliding of the sliding frame 43. The half gears 47 in each group of fixed frames 42 face opposite directions, and the sliding frames 43 in each group of fixed frames 42 move in opposite directions, so that the adjacent two output rods 411 move in opposite directions, and the adjacent two plungers 5 achieve the purpose of one drawing and one discharging, thereby achieving continuous alternating discharging. The purpose is to achieve seamless connection when discharging materials, so as to achieve the purpose of uniform transportation of the reciprocating pump. When the screw 410 is rotated to make the pressure rod 48 move downward, the extrusion inclined surface 4911 squeezes the pressure ring 493 and the slider 499. At this time, the friction ring 495 is separated from the fixed plate 491, and the shaft sleeve 46 loses power, and the half gear 47 stops. At the same time, the friction plate 498 fits the sliding frame 43, so that the sliding frame 43 is locked, so as to adjust the running quantity of the plunger 5. The push-pull rod 51 moves with the output rod 411, so that the piston column 54 moves, so as to achieve the purpose of suction and output of materials. Through uniform reciprocating movement, uniform transportation of the flow rate is achieved, and the number of movement groups of the plunger 5 is changed, so as to indirectly achieve the purpose of adjusting the number of connections of the pump cylinder 7, so as to achieve the adjustment of the flow rate when the motor speed remains unchanged. At the same time, the material output situation can also be accurately controlled by changing the motor input speed. The amount of flow is adjusted by adjusting the number of moving plungers 5 at this time to achieve the change of the upper and lower limits of flow regulation, so that the flow control range and accuracy are improved, and the push-pull rod 51 moves with the output rod 411, so that the piston column 54 moves, so as to achieve the purpose of suction and output of materials. In the suction and delivery of materials, some materials contain solid particles. At this time, the same liquid medium as the conveying material is injected into the pressure chamber 11 through the medium pipe 12, so that the pressure in the pressure chamber 11 is greater than the pressure in the pump cylinder 7, so as to avoid solid particles entering the pressure chamber 11 and causing wear of the piston column 54. After the plunger 5 stops, the locking bolt is unscrewed and the end cover 62 is removed, so that the push-pull rod 51 slides along the output rod 411 through the receiving groove 52, and the piston column 54 is pulled out of the sealing cylinder 6, so as to facilitate the replacement of the worn piston column 54, which is convenient to use.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A reciprocating pump comprises a base, characterized in that: a motor is installed on the base, the output shaft of the motor is fixedly connected to the input shaft of a reducer, the output shaft of the reducer is connected to a transmission mechanism, a plurality of sealing cylinders are installed on the base, plungers are slidably engaged in the sealing cylinders, the plungers are connected to a transmission mechanism for uniform material conveying and flow control, one end of the sealing cylinder away from the transmission mechanism is fixedly connected to a pump cylinder, one end of the pump cylinder is fixedly sleeved on a material pipe, and the other end of the pump cylinder is fixedly sleeved on a discharge pipe.
2. A reciprocating pump as described in claim 1 is characterized in that a one-way valve is installed at one end of the pump cylinder close to the inlet pipe and the outlet pipe, a partition is fixedly installed in the inner cavity of the inlet pipe between two adjacent pump cylinders, a one-way valve is fixedly sleeved on the partition, the feed port of the inlet pipe and the outlet port of the outlet pipe are in opposite directions, and a pressure gauge is fixedly installed on the outer wall of the outlet pipe close to the outlet.
3. The cam is an axially movable frame, and the cam is a plurality of intermediate frames, each of which is provided with a plurality of intermediate frames, and the intermediate frames are provided with a plurality of intermediate frames.
4. A reciprocating pump as described in claim 3 is characterized in that the inner cavity of the fixed box is provided with multiple groups of fixed frames, the number of fixed frames in each group is two, the half gears in the inner cavity of the two fixed frames in each group are oriented in opposite directions, and a pressure rod is provided on the top of each group of fixed frames.
5. A reciprocating pump as described in claim 4 is characterized in that the diameter of the sleeve is larger than the shaft, and the axis of the sleeve coincides with that of the shaft, a limiting ring is fixedly provided on the top outer wall of the screw, guide rods are fixedly installed on the tops of the pressure rods on both sides of the screw, and the guide rods slide through the top of the fixed box.
6. The reciprocating pump as claimed in claim 3 is characterized in that the clutch assembly includes a fixed plate, the rotating shafts at both ends of the shaft sleeve are fixedly sleeved with fixed plates, the outer wall of the shaft sleeve close to the fixed plate is fixedly installed with a fixing ring, a pressure ring is slidably sleeved on the shaft sleeve between the fixing ring and the outer wall of the fixing frame, and a plurality of sliding rods are slidably passed through the fixing ring, one end of the sliding rod is fixedly connected to the pressure ring, and the other end of the sliding rod is fixedly connected to the friction ring, and the friction ring is attached to the fixed plate, and a first spring is sleeved on the sliding rod between the friction ring and the fixing ring. The top of the inner walls of both sides of the fixing frame are provided with a receiving cavity, and friction plates are slidably engaged in the receiving cavity, and a sliding block is fixedly installed on the side of the friction plate away from the sliding frame, the sliding block slides through the outer wall of the fixing frame, and a second spring is installed between the sliding block and the outer wall of the fixing frame, and an extrusion inclined surface is provided between the inner wall of the pressure rod and the sliding block and the pressure ring.
7. A reciprocating pump as described in claim 6 is characterized in that a limit block is fixedly installed on the outer wall of one side of the slider close to the extrusion slope, a second spring is sleeved on the slider between the limit block and the outer wall of the fixed frame, and the first spring and the second spring are both in a compressed state.
8. A reciprocating pump as described in claim 6 is characterized in that two pairs of extrusion rods are integrally formed at the bottom of the pressure rod, and an extrusion slope is provided on one side of the extrusion rod close to the fixed frame, and the vertical projection length of the extrusion slope is greater than the difference between the depth of the storage cavity and the thickness of the friction plate.
9. A reciprocating pump as described in claim 3 is characterized in that the plunger includes a push-pull rod, one end of the push-pull rod is provided with a receiving groove, the end of the output rod away from the sliding frame is clamped in the receiving groove, and a locking bolt is threadedly sleeved on the push-pull rod, the locking bolt clamps the output rod, and the other end face of the push-pull rod is integrally formed with a threaded head, the threaded head is threadedly connected to the piston column, and the piston column is clamped in the sealing cylinder.
10. A reciprocating pump as described in claim 9 is characterized in that a sealing sleeve is fixedly sleeved on the inner wall of one end of the sealing cylinder close to the fixed box, the outer wall of the piston column is tightly fitted with the sealing sleeve, the end face of the sealing cylinder is installed with an end cover through a flange, the push-pull rod passes through the end cover, a pressure chamber is formed between the piston column and the inner wall of the end of the sealing cylinder away from the push-pull rod, a medium pipe is fixedly sleeved on the sealing cylinder, the medium pipe is connected to the pressure chamber, a cooling chamber is opened on the inner wall of the end of the sealing cylinder away from the pump cylinder, and the Two water cooling pipes are fixedly sleeved on the sealing cylinder.