A split block detachable pump head with magnetic plunger segmentation

Abstract

The present invention discloses a magnetic plunger segmented split block detachable pump head, belonging to the technical field of plunger pumps, the invention comprises a pump head and a pump body, the pump head and the pump body are matched with a plunger rod, the pump head and the pump body are detachably connected, the pump head can be inserted into the pump head in the longitudinal direction and connected, the pump head and the pump body have a connection, the upper end of the pump body has a concave step, the upper part of the pump head has a protrusion, the protrusion cooperates with the step, the step has a step surface that cooperates with the bottom surface of the protrusion, and the connecting piece passes through the protrusion and extends below the step surface. The present invention can realize the rapid and accurate assembly and disassembly of the pump head on the pump body, which is conducive to improving the movement stability of the plunger rod.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a detachable pump head with a split block having magnetically attracted plunger segments. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the solvent in the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] At present, the industry usually uses an integrated pump unit, in which the pump body and the pump head are fixedly connected. The plunger pump is difficult to disassemble and install. The process of disassembling and installing the plunger pump is time-consuming and labor-intensive, and the labor cost is high. For some industries with high requirements for disinfection and washing, the complete disassembly and replacement of the plunger pump will also increase production costs. For example, in the food or medical industry, once the plunger pump is completely disassembled, the parts in contact with the plunger pump need to be thoroughly disinfected. For this reason, a detachable plunger pump can address the above problems.

[0004] The invention patent with publication number CN104948410B discloses a booster pump and a booster method thereof. A middle chamber, a left chamber and a right chamber are provided in the middle of the inner side of the booster pump body. A positioning column is provided in the middle of the inner wall of the middle chamber. Piston rods are provided on both sides of the positioning column. The piston rods are composed of an upper piston rod and a lower piston rod. The cross-sectional area of ​​the upper piston rod is at least twice the cross-sectional area of ​​the lower piston rod. The upper piston rod is arranged in the middle chamber, and the lower piston rod is arranged in the left chamber and the right chamber. The device provides oil of a certain pressure for the driving chamber of the booster pump through a plunger pump of the prior art, and controls the ratio of the cross-sectional area of ​​the upper piston rod to the cross-sectional area of ​​the lower piston rod so that oil of a certain pressure is generated in the left chamber and the right chamber at the same time, that is, the higher the ratio of the cross-sectional area of ​​the upper piston rod to the cross-sectional area of ​​the lower piston rod, the higher the oil pressure generated. At the same time, the device can generate a large flow of oil while generating high pressure, without discontinuity, and meets the actual high-pressure operation needs. The plunger assembly disclosed in the invention generates high oil pressure and has the advantages of high medium transport efficiency, large transport flow and continuous transport. However, the difficulty in assembling and disassembling the plunger pump and the plunger rod in the prior art has not been solved. Summary of the invention

[0005] The object of the present invention is to provide a butt-jointed segmented plunger rod flange clamp split pump head which can reduce the difficulty of disassembly, cleaning and disinfection and has good oil film characteristics.

[0006] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0007] A detachable pump head with a magnetic plunger segmented block comprises: a pump head and a pump body, wherein a plunger rod is cooperatively arranged in the pump head and the pump body, the pump head and the pump body are detachably connected, the pump head can be inserted into and connected to the pump head in the longitudinal direction, and the pump head and the pump body have a connector at the connection. The detachable pump head and pump body facilitate replacement of conveying materials, that is, the conveying materials can be replaced by removing the pump head and replacing it, which reduces the difficulty of cleaning and disinfecting the original pump head on the one hand, and on the other hand, cleaning and disinfecting the removed pump head helps to reduce the contamination of new materials caused by residual materials in the pump head; the longitudinal plug-in connection between the pump head and the pump body can move the pump head relative to the pump body in a direction perpendicular to the connection between the two when assembling or disassembling the pump head, thereby reducing the lateral movement distance of the pump head, greatly reducing the difficulty of disassembling and assembling the pump head, and improving the replacement efficiency of the pump head when replacing the conveying materials, thereby improving the material replacement efficiency;

[0008] Preferably, the upper end of the pump body has a concave step, the upper part of the pump head has a protrusion, the protrusion cooperates with the step, the step has a step surface that cooperates with the bottom surface of the protrusion, and the connecting piece passes through the protrusion and extends below the step surface. During the assembly process, the pump head moves longitudinally relative to the pump body, so that the protrusion falls into and cooperates in the step, thereby guiding the pump head to be longitudinally plugged into the pump body. At the same time, the step forms a longitudinal position limit and a lateral position limit for the pump head relative to the pump body, thereby realizing rapid positioning of the pump head on the pump body when changing materials, and reducing damage caused by repeated extrusion and friction between the contact surface of the pump head and the pump body caused by adjusting the pump head;

[0009] The connecting piece passes through the protrusion and the end thereof falls under the step surface, thereby realizing horizontal positioning of the protrusion on the step, preventing the pump head from slipping and dislocating relative to the pump body on the plane where the step surface is located, and realizing stable connection of the pump head to the pump body. This is beneficial to reducing the possibility of interference with the outside of the plunger rod caused by misalignment of the pump head and the pump body after replacing the pump body, thereby causing damage to the plunger rod, thereby improving the sealing of the plunger rod in conveying materials and reducing the possibility of material leakage or contamination of the material by external factors.

[0010] Preferably, the pump body has a guide surface on the side of the step surface, and the protrusion has a mounting surface on the side of the bottom, and the mounting surface cooperates with the guide surface and can slide relative to it. When the pump head is installed on the pump body, the pump head carries the protrusion and is inserted into the step of the pump body. During the insertion process, the mounting surface at the bottom of the protrusion is preferentially in continuous contact with the guide surface to form an insertion guide, thereby improving the fit of the protrusion on the step, reducing the extrusion and wear of the protrusion on the step surface and its adjacent surfaces during the insertion process, preventing the wear of the pump body at the connection caused by assembling the pump head during the replacement of the conveying material, and reducing the maintenance cost;

[0011] The coordination of the mounting surface and the guide surface increases the contact surface between the pump head and the pump body, and improves the tightness of the connection between the pump body and the pump head after assembly, thereby weakening the vibration amplitude of the pump head relative to the pump body caused by the plunger pump during material conveying, and reducing the lateral interference of the connecting parts at the hole position, thereby improving the structural strength of the connecting parts, reducing the loss of restraint force of the connecting parts on the pump head and pump body in the step direction due to wear, and finally achieving the relative position stability of the pump head and pump body after assembly.

[0012] Preferably, a groove body is provided on the guide surface, the upper end of the groove body passes through the step surface, the lower end of the groove body has a groove bottom, the groove bottom supports the pump head, and the mounting surface has a block that cooperates with the groove body, and the block can be inserted into the groove body from the step surface. When installing the pump head on the pump body, firstly, the pump head and the pump body are aligned at the plug-in position by the cooperation of the guide surface and the mounting surface, and then the protrusion falls into the step to achieve cooperation by the relative sliding of the two. During the contact and sliding process between the mounting surface of the pump head and the guide surface of the pump body, the shaking of the pump head easily causes the deviation between the guide surface and the mounting surface, resulting in wear of the guide surface and the mounting surface or even the pump head cannot be inserted. The block can be inserted into the groove from the step surface while the mounting surface and the guide surface are in contact, forming the positioning of the pump head on the pump body along the insertion direction. At the same time, the restriction of the outer contour of the block by the groove forms the restriction of the pump head relative to the pump body in the direction perpendicular to the insertion direction, thereby reducing the possibility of wear of the guide surface and the assembly surface caused by inaccurate positioning of the pump head and the pump body before plugging, and improving the assembly success rate of the pump head on the pump body without additionally setting calibration and positioning tools;

[0013] When the pump head is inserted into the pump body and reaches the end of the stroke, the bottom of the groove forms a supporting contact with the pump head, forming a position limit of the pump head and the pump body in the insertion direction. On the one hand, it prevents the bottom end of the protrusion from excessively contacting and squeezing the step surface to cause step surface deformation or wear, thereby ensuring the matching degree of pump heads of different specifications on the pump body when changing materials. On the other hand, it prevents the vibration of the plunger pump during operation from causing the protrusion to move relative to the step surface in the plug-in direction, resulting in the possibility of the connector being bent or even broken by external force, thereby avoiding the possibility of the pump head and the pump body being unable to be separated due to deformation of the connector.

[0014] Preferably, there are at least two steps and they are symmetrically distributed on opposite sides of the pump body, the protrusions are arranged corresponding to the number of steps, the protrusions are symmetrically arranged on the pump head, the guide surfaces are parallel to each other, and the protrusions are arranged at one end of the pump head close to the pump body. Since the steps are arranged opposite to each other on the inner side of the pump body, when the pump head and the pump body are assembled, the blocks on both sides enter the slots at the same time, and the guide surfaces on both sides cooperate with the mounting surfaces on both sides to form installation guides on both sides. The installation guides on both sides are used to limit the insertion direction of the pump head relative to the pump body, and the direction of the pump head inserted into the pump body is corrected, so as to avoid the displacement of the pump head relative to the pump body due to gravity, resulting in the jamming of the insertion process or the mismatch of the contact surface. On the one hand, the probability of successful assembly of the pump head is improved when the conveying material is replaced, and on the other hand, the possibility of wear of the slot caused by the relative displacement of the block and the slot can be reduced, thereby avoiding the adhesion of wear debris to the pump head and the pump body, and reducing the difficulty of cleaning and disinfecting the pump head and the pump body; at the same time, the above scheme can also prevent wear debris from entering the pump head or the pump body to affect the movement stability of the plunger rod.

[0015] Preferably, the protrusion has a first hole body penetrating the upper and lower end surfaces, the step surface has a second hole body, the first hole body and the second hole body are coaxially arranged, the connecting piece includes a column body, the column body cooperates with the first hole body and the second hole body, and one end of the column body can pass through the first hole body and be located in the second hole body. The column body locks the protrusion relative to the step by passing through the first hole body and falling into the second hole body, thereby preventing the pump head from moving relative to the pump body due to gravity or external force.

[0016] Preferably, the pump body comprises a first base body and a second base body which are assembled and connected, the upper end surface of the second base body is a step surface, the inner wall surface of the second base body is a guide surface, the second base body has a vertical surface adjacent to and perpendicular to the guide surface, and the pump head has a side wall which cooperates with the guide surface and the vertical surface. The step is formed by assembling the first base body and the second base body, which reduces the manufacturing difficulty of the pump body, and by replacing the second base body of different sizes, the guide surface in different positions can be formed, so as to facilitate the adjustment of the distance between the pump head and the first base body, and improve the adaptability to plunger rods of different lengths.

[0017] Preferably, the pump body has a U-shaped cavity connected to its outer wall surface, the pump head and the pump body have a channel, the plunger rod cooperates in the channel, the plunger rod includes a first rod body and a second rod body that are detachably connected, the first rod body and the second rod body have a magnetic structure at the connection point, and the magnetic structure is located in the U-shaped cavity. The plunger rod adopts a split design and is connected using a magnetic structure, which facilitates the segmented manufacturing of the plunger rod and reduces the manufacturing difficulty; the magnetic structure can be adjusted through the U-shaped cavity to achieve the disassembly of the first rod body and the second rod body, that is, after the first rod body and the second rod body are separated, when the pump head is removed from the pump body along the plug-in direction, the pump head carries the first rod body through the internal channel thereof and separates it from the second rod body that cooperates in the pump body, that is, the radial separation of the first rod body and the second rod body can be achieved by disassembling the pump head, which optimizes the disassembly steps and improves the efficiency of material replacement. The efficiency of the plunger rod separation; after the pump head is separated from the pump body, the first rod body arranged in the pump head is taken out, the pump head and the first rod body are cleaned and disinfected, and the first rod body is assembled to the new pump head without replacing the plunger rod. The first rod body and the second rod body can be positioned by plugging the pump head on the pump body, and the first rod body and the second rod body can be connected by adjusting the magnetic component. There is no need to manually adjust the first rod body throughout the process, which reduces the possibility of secondary contamination of the first rod body after adjusting the flow or changing the material, and improves the cleanliness of the new material transportation.

[0018] Preferably, one end of the first rod is arranged in the pump head, the other end of the first rod is equipped with a first magnetic component, the second rod is matched in the pump body, one end of the second rod is connected to the power mechanism, the other end of the second rod is equipped with a second magnetic component, the first magnetic component and the second magnetic component cooperate and adsorb each other.

[0019] The present invention adopts a longitudinal plug-in method to realize the detachable connection between the pump head and the pump body, so it has the following beneficial effects: the detachable pump head and the pump body are convenient for replacing the conveying material, and the difficulty of cleaning and disinfecting the original pump head is reduced; the longitudinally plugged pump head reduces the axial distance of disassembly and assembly, thereby improving the material replacement efficiency; the cooperation of the mounting surface and the guide surface forms a pump head insertion guide, reduces the wear of the pump head on the pump body and the pump head during assembly, and reduces the maintenance cost; the cooperation of the mounting surface and the guide surface weakens the vibration-induced vibration amplitude of the pump head relative to the pump body, and reduces the lateral interference of the connecting piece; the card block is inserted into the card slot to form a restriction of the pump head relative to the pump body, and the assembly success rate is improved without additionally setting a calibration and positioning tool; the bottom of the groove supports the pump head to prevent the vibration interference from causing the connecting piece to be deformed by the external force in the plug-in direction, and avoids the pump head and the pump body from being unable to be separated; the segmented plunger rod can be detached along with the separation of the pump head and the pump body, thereby improving the material replacement efficiency; the positioning of the first rod body and the second rod body is realized by plugging the pump head on the pump body, thereby reducing the possibility of contamination of the first rod body and improving the cleanliness of the new material transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic top view of a detachable pump head with a segmented magnetic plunger block;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of a split block detachable pump head with a magnetic plunger segment;

[0022] Figure 3 It is a schematic diagram of the pump structure;

[0023] Figure 4 It is a schematic diagram of the pump head structure;

[0024] Figure 5 is a schematic diagram of the structure of the first rod body and the second rod body;

[0025] Figure 6 It is a schematic cross-sectional view of the plunger rod.

[0026] Figure numbers: pump head 1; connecting part 10; pump body 2; first base 201; second base 202; guide surface 20; guide surface 21; guide groove 22; plunger rod 3; first rod body 31; first mounting hole 311; second rod body 32; second mounting hole 321; protrusion 4; mounting surface 40; inclined surface 41; guide block 42; groove body 5; block 6; first magnetic member 7; second magnetic member 8. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings:

[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all 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.

[0029] Embodiment 1:

[0030] See attached Figure 1 -Attached Figure 4 A detachable pump head with a magnetic plunger segmented block, comprising: a pump head 1 and a pump body 2, wherein a plunger rod 3 is provided in the pump head 1 and the pump body 2, the pump head 1 and the pump body 2 are detachably connected, the pump head 1 can be inserted into and connected to the pump head 1 in the longitudinal direction, and the pump head 1 and the pump body 2 have a connector 10 at the connection.

[0031] The detachable pump head 1 and pump body 2 facilitate replacement of conveying materials, that is, the conveying materials can be replaced by removing the pump head 1 and replacing it, which reduces the difficulty of cleaning and disinfecting the original pump head 1 on the one hand, and helps to reduce the contamination of new materials caused by residual materials in the pump head 1 by cleaning and disinfecting the removed pump head 1 on the other hand; the longitudinal plug-in connection between the pump head 1 and the pump body 2 can make the pump head 1 move relative to the pump body 2 in a direction perpendicular to the connection between the two when assembling or disassembling the pump head 1, thereby reducing the lateral movement distance of the pump head 1, greatly reducing the difficulty of disassembling and assembling the pump head 1, and improving the replacement efficiency of the pump head 1 when replacing conveying materials, thereby improving the material replacement efficiency;

[0032] The upper end of the pump body 2 has a concave step, the upper part of the pump head 1 has a protrusion 4, the protrusion 4 cooperates with the step, the step has a step surface that cooperates with the bottom surface of the protrusion 4, and the connecting piece 10 passes through the protrusion 4 and extends below the step surface.

[0033] During the assembly process, the pump head 1 moves longitudinally relative to the pump body 2, so that the protrusion 4 falls into and fits in the step, thereby guiding the pump head 1 to be longitudinally plugged into the pump body 2. At the same time, the step forms a longitudinal position limit and a lateral position limit for the pump head 1 relative to the pump body 2, thereby realizing rapid positioning of the pump head 1 on the pump body 2 when replacing materials, and reducing damage caused by repeated extrusion and friction between the contact surface of the pump head 1 and the pump body 2 caused by adjusting the pump head 1.

[0034] The connecting piece 10 passes through the protrusion 4 and the end thereof falls under the step surface, thereby realizing horizontal positioning of the protrusion 4 on the step, preventing the pump head 1 from slipping and dislocating relative to the pump body 2 on the plane where the step surface is located, and realizing stable connection of the pump head 1 to the pump body 2, which is beneficial to reducing the possibility of interference with the outside of the plunger rod 3 caused by the misalignment of the pump head 1 and the pump body 2 after replacing the pump body 2, thereby causing damage to the plunger rod 3, thereby improving the sealing of the plunger rod 3 in conveying materials and reducing the possibility of material leakage or contamination of the material by external factors.

[0035] The pump body 2 has a guide surface 20 on the side of the step surface, and the protrusion 4 has a mounting surface 40 on the side of the bottom. The mounting surface 40 cooperates with the guide surface 20 and can slide relatively.

[0036] When the pump head 1 is installed on the pump body 2, the pump head 1 carries the protrusion 4 and is inserted into the step of the pump body 2. During the insertion process, the mounting surface 40 at the bottom of the protrusion 4 is preferentially in continuous contact with the guide surface 20 to form an insertion guide, thereby improving the adaptability of the protrusion 4 on the step, reducing the extrusion and wear of the protrusion 4 on the step surface and its adjacent surfaces during the insertion process, preventing the pump body 2 from being worn at the connection due to the assembly of the pump head 1 during the replacement of the conveying material, and reducing the maintenance cost;

[0037] The cooperation between the mounting surface 40 and the guide surface 20 increases the contact area between the pump head 1 and the pump body 2, and improves the tightness of the connection between the pump body 2 and the pump head 1 after assembly, thereby weakening the vibration amplitude of the pump head 1 relative to the pump body 2 caused by the plunger pump during the material conveying process, reducing the lateral interference of the connecting piece 10 at the hole position, thereby improving the structural strength of the connecting piece 10, and reducing the loss of the restraining force of the connecting piece 10 on the pump head 1 and the pump body 2 in the step direction due to wear, and finally achieving the relative position stability of the pump head 1 and the pump body 2 after assembly.

[0038] A groove body 5 is arranged on the guide surface 20, the upper end of the groove body 5 passes through the step surface, the lower end of the groove body 5 has a groove bottom, the groove bottom supports the pump head 1, and the mounting surface 40 has a clamping block 6 that cooperates with the groove body 5, and the clamping block 6 can be inserted into the groove body 5 from the step surface.

[0039] When the pump head 1 is installed on the pump body 2, the pump head 1 and the pump body 2 are first aligned at the plug-in position by the cooperation of the guide surface 20 and the mounting surface 40, and then the protrusion 4 falls into the step to achieve cooperation through the relative sliding of the two. During the contact and sliding process between the mounting surface 40 of the pump head 1 and the guide surface 20 of the pump body 2, the shaking of the pump head 1 easily causes the guide surface 20 and the mounting surface 40 to deviate, resulting in wear of the guide surface 20 and the mounting surface 40 or even the pump head 1 cannot be inserted. The block 6 can be inserted into the slot from the step surface while the mounting surface 40 and the guide surface 20 are in contact, so as to form the positioning of the pump head 1 on the pump body 2 along the insertion direction. At the same time, the restriction of the outer contour of the block 6 by the slot forms the restriction of the pump head 1 relative to the pump body 2 in the direction perpendicular to the insertion direction, thereby reducing the possibility of wear of the guide surface 20 and the assembly surface caused by inaccurate positioning of the pump head 1 and the pump body 2 before plugging, and improving the assembly success rate of the pump head 1 on the pump body 2 without additionally setting a calibration and positioning tool.

[0040] When the pump head 1 is inserted into the pump body 2 and reaches the end of the stroke, the bottom of the groove forms a supporting contact with the pump head 1, forming a position limit of the pump head 1 and the pump body 2 in the insertion direction. On the one hand, it prevents the bottom end of the protrusion 4 from excessively contacting and squeezing the step surface to cause step surface deformation or wear, thereby ensuring the matching degree of pump heads 1 of different specifications on the pump body 2 when changing materials. On the other hand, it prevents the vibration of the plunger pump during operation from causing the protrusion 4 to move relative to the step surface in the plug-in direction, resulting in the possibility of the connector 10 being bent or even broken by external force, thereby avoiding the possibility that the pump head 1 and the pump body 2 cannot be separated due to the deformation of the connector 10.

[0041] There are at least two steps which are symmetrically distributed on opposite sides of the pump body 2 . The protrusions 4 are arranged corresponding to the number of steps. The protrusions 4 are symmetrically arranged on the pump head 1 . The guide surfaces 20 are parallel to each other. The protrusions 4 are arranged at one end of the pump head 1 close to the pump body 2 .

[0042] Since the steps are arranged opposite to each other on the inner side of the pump body 2, when the pump head 1 is assembled with the pump body 2, the blocks 6 on both sides enter the slots at the same time, and the guide surfaces 20 on both sides cooperate with the mounting surfaces 40 on both sides to form mounting guides on both sides. The mounting guides on both sides are used to limit the insertion direction of the pump head 1 relative to the pump body 2, so that the direction of the pump head 1 inserted into the pump body 2 is corrected, and the pump head 1 is prevented from being stuck during the insertion process or the contact surfaces are not matched due to the displacement of the pump head 1 relative to the pump body 2 due to gravity. On the one hand, the probability of successful assembly of the pump head 1 when the conveying material is replaced is improved, and on the other hand, the possibility of wear of the slot caused by the relative displacement of the block 6 and the slot can be reduced, thereby avoiding the adhesion of wear debris to the pump head 1 and the pump body 2, and reducing the difficulty of cleaning and disinfecting the pump head 1 and the pump body 2; at the same time, the above scheme can also prevent wear debris from entering the pump head 1 or the pump body 2 and affecting the movement stability of the plunger rod 3.

[0043] The protrusion 4 has a first hole body penetrating the upper and lower end surfaces, and the step surface has a second hole body. The first hole body and the second hole body are coaxially arranged. The connecting member 10 includes a column body, which cooperates with the first hole body and the second hole body. One end of the column body can pass through the first hole body and be located in the second hole body. The column body passes through the first hole body and falls into the second hole body to achieve the locking of the protrusion 4 relative to the step, thereby preventing the pump head 1 from moving relative to the pump body 2 due to gravity or external force.

[0044] The pump body 2 includes a first base 201 and a second base 202 which are assembled and connected. The upper end surface of the second base 202 is a step surface, the inner wall surface of the second base 202 is a guide surface 20, the second base 202 has a vertical surface adjacent to and perpendicular to the guide surface 20, and the pump head 1 has a side wall that cooperates with the guide surface 20 and the vertical surface. The step is formed by assembling the first base 201 and the second base 202, which reduces the manufacturing difficulty of the pump body 2, and by replacing the second base 202 of different sizes, the guide surface 20 at different positions can be formed, so that it is easy to adjust the distance between the pump head 1 and the first base 201, and improve the adaptability to the plunger rods 3 of different lengths.

[0045] See attached Figure 5 - Attachment Figure 6The pump body 2 has a U-shaped cavity connected to its outer wall surface, the pump head 1 and the pump body 2 have a channel, the plunger rod 3 cooperates in the channel, and the plunger rod 3 includes a first rod body 31 and a second rod body 32 that are detachably connected. The first rod body 31 and the second rod body 32 have a magnetic structure at the connection point, and the magnetic structure is located in the U-shaped cavity. The plunger rod 3 adopts a split design and is connected using a magnetic structure, which is convenient for segmented manufacturing of the plunger rod 3 and reduces the manufacturing difficulty; the magnetic structure can be adjusted through the U-shaped cavity to realize the disassembly of the first rod body 31 and the second rod body 32, that is, after the first rod body 31 and the second rod body 32 are separated, when the pump head 1 is removed from the pump body 2 along the plug-in direction, the pump head 1 carries the first rod body 31 through the internal channel and separates it from the second rod body 32 that cooperates in the pump body 2, that is, the radial separation of the first rod body 31 and the second rod body 32 can be realized by disassembling the pump head 1, which optimizes the disassembly steps, improves the material replacement efficiency and the plunger The efficiency of the rod 3 separation; the pump head 1 is first separated from the pump body 2, and the first rod 31 arranged in the pump head 1 is taken out, the pump head 1 and the first rod 31 are cleaned and disinfected, and the first rod 31 is assembled to the new pump head 1 without replacing the plunger rod 3. The first rod 31 and the second rod 32 can be positioned by plugging the pump head 1 on the pump body 2, and the first rod 31 and the second rod 32 can be connected by adjusting the magnetic component. There is no need to manually adjust the first rod 31 throughout the process, which reduces the possibility of secondary contamination of the first rod 31 after adjusting the flow or changing the material, and improves the cleanliness of the new material transportation.

[0046] One end of the first rod body 31 is arranged in the pump head 1, and the other end of the first rod body 31 is installed with the first magnetic component 7. The second rod body 32 is arranged in the pump body 2, one end of the second rod body 32 is connected to the power mechanism, and the other end of the second rod body 32 is installed with the second magnetic component 8. The first magnetic component 7 and the second magnetic component 8 cooperate with each other and are adsorbed on each other.

[0047] The first rod body 31 has a first mounting hole 311 at one end, and the first magnetic member 7 is mounted in the first mounting hole 311; the second rod body 32 has a second mounting hole 321 at one end, and the second magnetic member 8 is mounted in the second mounting hole 321;

[0048] The first magnetic member 7 has a first magnetic pole extending out of the first mounting hole 311 , and the second magnetic member 8 has a second magnetic pole extending out of the second mounting hole 321 . The first magnetic pole and the second magnetic pole are opposite to each other and are opposite magnetic poles.

[0049] By replacing the magnetic block in the mounting hole, the distance between the first rod body 31 and the second rod body 32 at the connecting end can be adjusted, thereby realizing the adjustment of the overall length of the plunger rod 3, and improving the adaptability to pump heads 1 of different specifications when replacing the pump head 1. At the same time, by adjusting the overall final axial length of the plunger rod 3, the starting position of the stroke of different plunger rods 3 moving in the same pump head 1 can be changed, thereby realizing the change of the material delivery flow rate without replacing the pump head 1 and the power end driving the plunger rod 3.

[0050] The first magnetic pole extends out of the first mounting hole 311, and the second magnetic pole extends out of the second mounting hole 321. On the one hand, this avoids the situation where the end faces of the first rod body 31 and the second rod body 32 contact at the connection point, resulting in insufficient contact between the first magnetic pole and the second magnetic pole, thereby improving the stability of the magnetic connection between the first rod body 31 and the second rod body 32, and helping to stabilize the coaxiality of the two rod bodies. On the other hand, the magnetic poles extending out of the mounting holes can enable a spacing between the end faces of the first rod body 31 and the second rod body 32 where the magnetic blocks are provided, thereby reducing the possibility of collision and wear between the end faces of the first rod body 31 and the second rod body 32 during assembly caused by vibration interference, thereby reducing the maintenance cost of the plunger rod 3 and the difficulty of assembling the plunger rod 3.

[0051] The above scheme allows a gap to exist between the end faces of the first rod body 31 and the second rod body 32 at the connection, which facilitates magnetic adjustment of the two magnetic blocks through the U-shaped cavity of the pump body 2, so that the first rod body 31 and the second rod body 32 lose their connection, thereby achieving longitudinal separation of the pump head 1 and the pump body 2 while the first rod body 31 and the second rod body 32 are separated radially.

[0052] See attached Figure 3 - Attachment Figure 4 The guide surface 20 is smoothly connected to a guide surface 21 at the top, the guide surface 21 extends to the step surface and is inclined in a direction away from the protrusion 4, and the protrusion 4 has an inclined surface 41 on the bottom side that cooperates with the guide surface 21.

[0053] The guide surface 21 has a guide groove 22 with a uniform depth. The inclined surface 41 is provided with a guide block 42 matched with the guide groove 22. The guide groove 22 is connected to the card slot.

[0054] It should be noted that the card block 6 can smoothly pass through the connection between the card slot and the guide slot 22 and enter the card slot. After the card block 6 enters the card slot, the guide slot 22 can contact and support the card block 6. When the card block 6 is engaged in the guide slot 22, there is a gap between the inclined surface 41 and the guide surface 21.

[0055] The setting of the inclined surface 41 provides a guide for the card block 6 to enter the card slot, and provides an adjustable space for the positioning of the card block 6 before entering the card slot, that is, before the card block 6 enters the card slot, it can pass through the step surface and reach between the two inclined surfaces 41 first, and then adjust the orientation of the card block 6 according to the position of the card slot, so that the card blocks 6 on both sides can smoothly enter the card slots on both sides, avoiding the outer edge of the bottom end surface of the card block 6 colliding with the step surface due to inaccurate positioning when the card block 6 enters the card slot, causing damage to the step surface, and reducing the damage of the pump head 1 to the pump body 2 at the plug-in end surface during flow adjustment or material replacement.

[0056] When the bottom end of the block 6 contacts the bottom of the groove, the guide block 42 can contact the guide groove 22, so that the guide groove 22 supports the guide block 42, that is, when the pump head 1 is connected to the pump body 2, the inclined surface 41 realizes partial gravity support for the pump head 1 through the contact support between the guide groove 22 and the guide block 42. On the one hand, it reduces the impact force of the bottom end of the block 6 on the bottom of the groove at the moment the pump head 1 is inserted into the pump body 2, thereby preventing the block 6 and the bottom of the groove from being damaged and causing other pump heads 1 to be unable to be assembled on the pump body 2. On the other hand, it prevents the bottom of the groove from being subjected to excessive impact force, causing the bottom of the groove to be concave and deformed, causing misalignment of the internal channel after the pump head 1 and the pump body 2 are assembled, and causing the plunger rod 3 to be interfered with from the side during movement, affecting the life of parts and the stability of material transportation.

[0057] Embodiment 2: Based on the embodiment 1 of the present case, the first magnetic member 7 is a magnetic material, the second magnetic member 8 is an electromagnet, and the second magnetic member 8 can change its magnetic attraction ability by powering on and off.

[0058] When the first rod 31 and the second rod 32 need to be connected, the first magnetic component 7 is brought close to the second magnetic component 8. At this time, the second magnetic component 8 is in a de-energized state and has magnetic attraction. The first magnetic component 7 can be adsorbed by the second magnetic component 8 through magnetic force to achieve the connection between the first rod 31 and the second rod 32.

[0059] When the first rod 31 and the second rod 32 need to be separated, the second magnetic member 8 is energized to make the second magnetic member 8 lose its magnetism. At this time, the second magnetic member 8 and the first magnetic member 7 lose their magnetic attraction, and the first rod 31 and the second rod 32 can be separated normally.

[0060] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A detachable pump head with a magnetic plunger segment, comprising: A pump head (1) and a pump body (2), wherein the pump head (1) and the pump body (2) are provided with a plunger rod (3) in cooperation, wherein the pump head (1) and the pump body (2) are detachably connected, the pump head (1) can be inserted into the pump body (2) in the longitudinal direction and connected, the pump head (1) and the pump body (2) have a connecting piece (10) at the connection, the upper end of the pump body (2) has a concave step, the upper part of the pump head (1) has a protrusion (4), the protrusion (4) cooperates with the step, the The step has a step surface that matches the bottom surface of the protrusion (4), the connecting member (10) passes through the protrusion (4) and extends below the step surface, the pump body (2) has a guide surface (20) on the side of the step surface, the protrusion (4) has a mounting surface (40) on the side of the bottom, the mounting surface (40) matches the guide surface (20) and can slide relatively, and a groove body (5) is provided on the guide surface (20), the upper end of the groove body (5) passes through the step surface, and the lower end of the groove body (5) has a groove bottom The bottom of the groove supports the pump head (1); the mounting surface (40) has a block (6) that cooperates with the groove body (5); the block (6) can be inserted into the groove body (5) from the step surface; the pump body (2) comprises a first base body (201) and a second base body (202) that are assembled and connected; the upper end surface of the second base body (202) is the step surface; the inner wall surface of the second base body (202) is the guide surface (20); the second base body (202) has a first base body (201) and a second base body (202) that are adjacent to and perpendicular to the guide surface (20). The pump head (1) has a side wall that cooperates with the guide surface (20) and the vertical surface, the pump body (2) has a U-shaped cavity that is connected to its outer wall surface, the pump head (1) and the pump body (2) have a channel, the plunger rod (3) cooperates in the channel, the plunger rod (3) comprises a first rod body (31) and a second rod body (32) that are detachably connected, the first rod body (31) and the second rod body (32) have a magnetic structure at the connection, and the magnetic structure is located in the U-shaped cavity.

2. According to claim 1, a magnetic plunger segmented split block detachable pump head is characterized by: There are at least two steps which are symmetrically distributed on opposite sides of the pump body (2); the protrusions (4) are arranged in a number corresponding to the number of the steps; the protrusions (4) are symmetrically arranged on the pump head (1); the guide surfaces (20) are parallel to each other; and the protrusions (4) are arranged at one end of the pump head (1) close to the pump body (2).

3. The magnetic plunger segmented split block detachable pump head according to claim 1 is characterized by: The protrusion (4) has a first hole that passes through the upper and lower end surfaces, the step surface has a second hole, the first hole and the second hole are coaxially arranged, the connecting member (10) includes a column, the column cooperates with the first hole and the second hole, and one end of the column can pass through the first hole and be located in the second hole.

4. The magnetic plunger segmented split block detachable pump head according to claim 1 is characterized by: One end of the first rod body (31) is arranged in cooperation with the pump head (1), and the other end of the first rod body (31) is installed with a first magnetic component (7). The second rod body (32) is arranged in cooperation with the pump body (2), and one end of the second rod body (32) is connected to the power mechanism, and the other end of the second rod body (32) is installed with a second magnetic component (8). The first magnetic component (7) and the second magnetic component (8) cooperate with each other and are attracted to each other.

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