Split detachable pump head assembly with magnetically attracted plunger segments

Abstract

A split detachable pump head assembly with magnetically attracted plunger segments. The split detachable pump head assembly comprises 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) in a fitted manner; the pump head (1) can be inserted into and connected to the pump body (2) in a longitudinal direction; a connector (10) is provided at the connection portion of the pump head (1) and the pump body (2); a recessed step is provided at the upper end of the pump body (2); a protrusion (4) is provided at the upper portion of the pump head (1); the step has a step surface fitting with the bottom surface of the protrusion (4); and the connector (10) passes through the protrusion (4) and extends below the step surface. The pump head (1) can be rapidly and accurately assembled and disassembled on the pump body (2), which is conducive to improving the motion stability of the plunger rod (3).

Description

A magnetic plunger segmented detachable pump head Technical Field

[0001] This invention belongs to the field of plunger pump technology, specifically relating to a detachable pump head with a magnetically attached plunger segment. Background Technology

[0002] A piston pump is an important component of a hydraulic system. It relies on the reciprocating motion of a piston within a cylinder to change the fluid in the sealed working chamber, thus achieving oil suction and pressure. Piston pumps offer advantages such as high rated pressure, compact structure, high efficiency, and convenient flow rate adjustment.

[0003] Currently, the industry typically uses integrated pump units, where the pump body and pump head are fixedly connected. Disassembling and installing plunger pumps is difficult, time-consuming, and labor-intensive, resulting in high labor costs. For industries with high disinfection and washing requirements, complete disassembly and replacement of the plunger pump can increase production costs, such as in the food or medical industries. Once a plunger pump is completely disassembled, all parts in contact with it must be thoroughly disinfected. Therefore, detachable plunger pumps can address these issues.

[0004] Chinese patent application CN104948410B discloses a booster pump and its boosting method. The booster pump has a central chamber, a left chamber, and a right chamber on its inner side. A positioning post is located in the center of the inner wall of the central chamber, and piston rods are located on both sides of the positioning post. Each piston rod consists of an upper piston rod and a lower piston rod, with the cross-sectional area of ​​the upper piston rod being at least twice that of the lower piston rod. The upper piston rod is located in the central chamber, and the lower piston rod is located in the left and right chambers. This device uses a conventional plunger pump to provide oil of a certain pressure to the booster pump's drive chamber. By controlling the ratio of the cross-sectional area of ​​the upper piston rod to that of the lower piston rod, oil of a certain pressure is simultaneously generated in both the left and right chambers. That is, the higher the ratio of the cross-sectional area of ​​the upper piston rod to that of the lower piston rod, the higher the pressure of the generated oil. Furthermore, this device can generate a large flow rate of oil while simultaneously generating high pressure, without interruption, thus meeting the needs of practical high-pressure operations. The plunger assembly disclosed in this invention generates high oil pressure and has the advantages of high medium transportation efficiency, large flow rate, and continuous delivery. However, the difficulties in assembling and disassembling the plunger pump and plunger rod in the prior art have not been solved. Summary of the Invention

[0005] The purpose of this invention is to provide a split-type plunger rod flange clamp pump head that reduces 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 objectives is as follows:

[0007] A detachable pump head with a segmented magnetic plunger includes a pump head and a pump body. A plunger rod is fitted into the pump head and pump body, and the pump head and pump body are detachably connected. The pump head can be inserted and connected in the longitudinal direction, and a connector is provided at the connection point between the pump head and pump body. The detachable pump head and pump body facilitate the replacement of conveyed materials. The material can be changed simply by removing and replacing the pump head. This reduces the difficulty of cleaning and disinfecting the original pump head, and the cleaning and disinfection of the removed pump head helps reduce the contamination of new materials caused by material residue in the pump head. The longitudinal insertion connection between the pump head and pump body allows the pump head to move relative to the pump body in a direction perpendicular to the connection during assembly or disassembly, thereby reducing the lateral movement distance of the pump head. This significantly reduces the difficulty of disassembling and assembling the pump head, improves the replacement efficiency of the pump head when changing conveyed materials, and thus improves the material replacement efficiency.

[0008] Preferably, the upper end of the pump body has a recessed step, and the upper part of the pump head has a protrusion. The protrusion mates with the step, and the step has a stepped surface that mates with the bottom surface of the protrusion. The connector passes through the protrusion and extends below the stepped surface. During assembly, the pump head moves longitudinally relative to the pump body, causing the protrusion to fall into and mate within the step. This guides the longitudinal insertion of the pump head onto the pump body. Simultaneously, the step defines the longitudinal and lateral positions of the pump head relative to the pump body, enabling rapid positioning of the pump head on the pump body when changing materials and reducing damage caused by repeated squeezing and friction between the pump head and the pump body during adjustment.

[0009] The connector passes through the protrusion and its end falls below the step, achieving horizontal positioning of the protrusion on the step. This prevents the pump head from sliding or misaligning relative to the pump body on the plane of the step, ensuring a stable connection between the pump head and the pump body. This helps reduce the possibility of interference to the outside of the plunger rod caused by misalignment between the pump head and the pump body after pump body replacement, which could lead to damage to the plunger rod. As a result, the sealing performance of the plunger rod in conveying materials is improved, reducing the possibility of material leakage or contamination by external factors.

[0010] Preferably, the pump body has a guide surface on the side of the stepped surface, and the protrusion has a mounting surface on the bottom side. The mounting surface and the guide surface cooperate and can slide relative to each other. When the pump head is installed on the pump body, the pump head carrying the protrusion is inserted into the stepped surface of the pump body. During the insertion process, the mounting surface at the bottom of the protrusion preferentially and continuously contacts the guide surface, forming a guide for insertion, improving the fit of the protrusion on the stepped surface, reducing the extrusion and wear on the stepped surface and its adjacent surfaces during the insertion process, preventing wear at the connection point of the pump body caused by assembling the pump head during material replacement, and reducing maintenance costs.

[0011] The fit between the mounting surface and the guide surface increases the contact area between the pump head and the pump body, improving the tightness of the connection after the pump body and pump head are assembled. This reduces the amplitude of the pump head relative to the pump body due to vibration during the material conveying process of the plunger pump, reduces the lateral interference of the connecting parts at the hole position, thereby improving the structural strength of the connecting parts, reducing the loss of the constraint force of the connecting parts on the pump head and pump body in the stepped direction due to wear, and ultimately achieving the relative positional stability of the pump head and pump body after assembly.

[0012] Preferably, a groove is provided on the guide surface, with the upper end of the groove extending to the stepped surface and the lower end of the groove having a bottom that supports the pump head. The mounting surface has a locking block that mates with the groove, and the locking block can be inserted into the groove from the stepped surface. When installing the pump head on the pump body, the alignment of the pump head and the pump body at the insertion position is first achieved through the cooperation of the guide surface and the mounting surface. Then, the relative sliding of the two causes the protrusion to fall into the step to achieve a proper fit. 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 can easily cause the guide surface and the mounting surface to deviate, leading to wear on the guide surface and the mounting surface, or even preventing the pump head from being inserted. The locking block can be inserted into the slot from the stepped 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 locking block by the slot forms the restriction of the pump head relative to the pump body in the direction perpendicular to the insertion direction, reducing the possibility of wear on the guide surface and the mounting surface due to inaccurate positioning of the pump head and the pump body before insertion. This improves the assembly success rate of the pump head on the pump body without the need for additional calibration and positioning tools.

[0013] When the pump head is inserted into the pump body and reaches the end of its stroke, the bottom of the groove forms a supporting contact with the pump head, thus defining the position of the pump head and the pump body in the insertion direction. On the one hand, this prevents the bottom of the protrusion from making excessive contact and squeezing the stepped surface, causing deformation or wear of the stepped surface, and ensuring the matching degree of different specifications of pump heads 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 stepped surface in the insertion direction, which could lead to the connection being bent or even broken by external forces, thereby avoiding the possibility that the pump head and pump body cannot be separated due to deformation of the connection.

[0014] Preferably, there are at least two steps symmetrically distributed on opposite sides inside the pump body, and the number of protrusions corresponds to the number of steps. The protrusions are symmetrically arranged on the pump head, with the guide surfaces parallel to each other, and the protrusions are located at the end of the pump head closest to the pump body. Because the steps are arranged opposite each other inside the pump body, when the pump head and pump body are assembled, the locking blocks on both sides simultaneously enter the slots. At the same time, the guide surfaces on both sides cooperate with the mounting surfaces on both sides to form mounting guides on both sides. These mounting guides restrict the insertion direction of the pump head relative to the pump body, correcting the direction of the pump head insertion into the pump body. This prevents the pump head from shifting relative to the pump body due to gravity, which could cause jamming or misfitting of the contact surfaces. This increases the probability of successful pump head assembly when changing materials and reduces the possibility of wear on the slots caused by relative shifting of the locking blocks and slots. This prevents wear debris from adhering to the pump head and pump body, reducing the difficulty of cleaning and disinfecting the pump head and pump body. Simultaneously, this solution also prevents wear debris from entering the pump head or pump body and affecting the stability of the plunger rod movement.

[0015] Preferably, the protrusion has a first hole penetrating through the upper and lower end faces, and the stepped surface has a second hole. The first hole and the second hole are coaxially arranged. The connecting member includes a column, which mates with both the first hole and the second hole. One end of the column can pass through the first hole and be located within the second hole. By passing through the first hole and falling into the second hole, the column locks the protrusion relative to the step, preventing the pump head from moving relative to the pump body due to gravity or external forces.

[0016] Preferably, the pump body includes a first base and a second base that are assembled together. The upper surface of the second base is a stepped surface, the inner wall surface of the second base is a guide surface, and the second base has a vertical surface adjacent to and perpendicular to the guide surface. The pump head has a sidewall that mates with the guide surface and the vertical surface. The step is formed by assembling the first base and the second base, which reduces the manufacturing difficulty of the pump body. Furthermore, by replacing the second base with different sizes, guide surfaces at different positions can be formed, thereby facilitating the adjustment of the distance between the pump head and the first base and improving the adaptability to plunger rods of different lengths.

[0017] Preferably, the pump body has a U-shaped cavity communicating with its outer wall surface, the pump head and the pump body have a channel, and the plunger rod is fitted within the channel. The plunger rod includes a first rod and a second rod that are detachably connected. The first rod and the second rod have a magnetic structure at the connection point, and the magnetic structure is located within the U-shaped cavity. The plunger rod adopts a split design and is connected by a magnetic structure, which facilitates the segmented manufacturing of the plunger rod and reduces manufacturing difficulty. The first rod and the second rod can be disassembled by adjusting the magnetic structure through the U-shaped cavity. That is, after the first rod and the second rod are separated, when the pump head is removed from the pump body along the insertion direction, the pump head carries the first rod and the second rod fitted in the pump body through its internal channel to achieve separation. In other words, the radial separation of the first rod and the second rod can be achieved by disassembling the pump head, optimizing the disassembly steps and improving material replacement efficiency. The efficiency of the plunger rod separation: After the pump head is separated from the pump body, the first rod body, which is installed in the pump head, is taken out. The pump head and the first rod body are cleaned and disinfected. Without replacing the plunger rod, the first rod body is assembled into the new pump head. The positioning of the first rod body and the second rod body can be achieved by inserting the pump head into the pump body. Then, the connection between the first rod body and the second rod body can be achieved by adjusting the magnetic component. The first rod body does not need to be manually adjusted throughout the process, which reduces the possibility of secondary contamination of the first rod body after adjusting the flow rate or changing the material, and improves the cleanliness of the new material conveying.

[0018] Preferably, one end of the first rod is fitted inside the pump head, and a first magnetic element is installed at the other end of the first rod. The second rod is fitted inside the pump body, one end of the second rod is connected to the power mechanism, and a second magnetic element is installed at the other end of the second rod. The first magnetic element and the second magnetic element cooperate and attract each other.

[0019] This invention, by employing a longitudinal insertion method to achieve a detachable connection between the pump head and the pump body, offers the following advantages: The detachable pump head and pump body facilitate material replacement and reduce the difficulty of cleaning and disinfecting the original pump head; the longitudinal insertion reduces the axial distance for disassembly and assembly, thereby improving material replacement efficiency; the fit between the mounting surface and the guide surface forms a pump head insertion guide, reducing wear on the pump head and pump body during assembly and lowering maintenance costs; the fit between the mounting surface and the guide surface weakens the vibration-induced shaking amplitude of the pump head relative to the pump body, reducing lateral interference of the connecting parts; the insertion of the locking block into the slot restricts the pump head relative to the pump body, increasing the assembly success rate without the need for additional calibration and positioning tools; the bottom of the slot supports the pump head, preventing vibration interference from causing deformation of the connecting parts due to external forces in the insertion direction, thus preventing the pump head and pump body from becoming inseparable; the segmented plunger rod can detach along with the separation of the pump head and pump body, improving material replacement efficiency; the insertion of the pump head onto the pump body achieves positioning of the first and second rods, reducing the possibility of contamination of the first rod and improving the cleanliness of the new material being conveyed. Attached Figure Description

[0020] Figure 1 is a top view of a split-block detachable pump head with a magnetic plunger segment;

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

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

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

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

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

[0026] Reference numerals: Pump head 1; Connector 10; Pump body 2; First base 201; Second base 202; Guide surface 20; Guide surface 21; Guide groove 22; Piston 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 5; Locking block 6; First magnetic component 7; Second magnetic component 8. Embodiments of the present invention

[0027] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings:

[0028] Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0029] Example 1:

[0030] Referring to Figures 1-4, a detachable pump head with a magnetic plunger segment includes: a pump head 1 and a pump body 2. A plunger rod 3 is provided inside 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 and connected in the longitudinal direction. The pump head 1 and the pump body 2 have a connector 10 at the connection point.

[0031] The detachable pump head 1 and pump body 2 facilitate the replacement of conveyed materials. That is, the conveyed materials can be replaced by removing the pump head 1 and replacing it. On the one hand, it reduces the difficulty of cleaning and disinfecting the original pump head 1. On the other hand, cleaning and disinfecting the removed pump head 1 helps to reduce the contamination of new materials caused by material residue in the pump head 1. The longitudinal plug-in connection between the pump head 1 and the pump body 2 allows the pump head 1 to 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. This reduces the lateral movement distance of the pump head 1, greatly reduces the difficulty of disassembling and assembling the pump head 1, and improves the replacement efficiency of the pump head 1 when changing conveyed materials, thereby improving the material replacement efficiency.

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

[0033] During assembly, the pump head 1 moves longitudinally relative to the pump body 2, causing the protrusion 4 to fall into and engage within the step, thus guiding the longitudinal insertion of the pump head 1 onto the pump body 2. At the same time, the step defines the longitudinal and lateral positions of the pump head 1 relative to the pump body 2, enabling rapid positioning of the pump head 1 on the pump body 2 when changing materials, and reducing damage caused by repeated squeezing and friction between the pump head 1 and the pump body 2 due to adjustments of the pump head 1.

[0034] The connector 10 passes through the protrusion 4 and its end falls below the step surface, realizing the horizontal positioning of the protrusion 4 on the step. This prevents the pump head 1 from sliding and misaligning relative to the pump body 2 on the plane of the step surface, and ensures a stable connection between the pump head 1 and the pump body 2. This helps to reduce the possibility of interference to 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, which could lead to damage to the plunger rod 3. This improves the sealing performance of the plunger rod 3 in conveying materials and reduces the possibility of material leakage or contamination by external factors.

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

[0036] When the pump head 1 is installed on the pump body 2, the pump head 1 carrying the protrusion 4 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 in continuous contact with the guide surface 20, forming a guide for insertion, improving the fit of the protrusion 4 on the step, reducing the extrusion wear of the protrusion 4 on the step surface and its adjacent surfaces during the insertion process, preventing wear at the connection point of the pump body 2 caused by assembling the pump head 1 during the replacement of conveyed materials, and reducing maintenance costs.

[0037] The fit between the mounting surface 40 and the guide surface 20 increases the contact area between the pump head 1 and the pump body 2, improving the tightness of the connection after the pump body 2 and the pump head 1 are assembled. This reduces the amplitude of the vibration of the pump head 1 relative to the pump body 2 caused by the vibration during the material conveying process of the plunger pump, reduces the lateral interference of the connector 10 at the hole position, thereby improving the structural strength of the connector 10, reducing the loss of the constraint force of the connector 10 on the pump head 1 and the pump body 2 in the stepped direction due to wear, and finally achieving the relative positional stability of the pump head 1 and the pump body 2 after assembly.

[0038] A groove 5 is provided on the guide surface 20. The upper end of the groove 5 extends to the stepped surface, and the lower end of the groove 5 has a bottom. The bottom of the groove supports the pump head 1. The mounting surface 40 has a locking block 6 that cooperates with the groove 5. The locking block 6 can be inserted into the groove 5 from the stepped surface.

[0039] When installing the pump head 1 on the pump body 2, the alignment of the pump head 1 and the pump body 2 at the insertion position is first achieved by the cooperation of the guide surface 20 and the mounting surface 40. Then, the protrusion 4 falls into the step to achieve the cooperation by 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 can easily cause 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 inability to insert the pump head 1. The locking block 6 can be inserted into the slot from the step surface at the same time as the mounting surface 40 and the guide surface 20 form contact, forming 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 locking 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, reducing the possibility of wear of the guide surface 20 and the mounting surface due to inaccurate positioning of the pump head 1 and the pump body 2 before insertion. This improves the assembly success rate of the pump head 1 on the pump body 2 without setting additional calibration positioning tools.

[0040] When the pump head 1 is inserted into the pump body 2 and reaches the end of its stroke, the bottom of the groove forms a supporting contact with the pump head 1, thus defining the position of the pump head 1 and the pump body 2 in the insertion direction. On the one hand, this prevents the bottom end of the protrusion 4 from making excessive contact and squeezing the stepped surface, causing deformation or wear of the stepped surface, and ensuring the matching degree of different specifications of pump heads 1 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 stepped surface in the insertion direction, which could lead to the connection 10 being bent or even broken by external forces, thereby avoiding the possibility that the pump head 1 and the pump body 2 cannot be separated due to deformation of the connection 10.

[0041] There are at least two steps that are symmetrically distributed on opposite sides inside the pump body 2. The number of protrusions 4 corresponds 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 located at the end of the pump head 1 near the pump body 2.

[0042] Because the steps are arranged opposite each other on the inner side of the pump body 2, when the pump head 1 is assembled with the pump body 2, the locking blocks 6 on both sides simultaneously enter the slots. At the same time, the guide surfaces 20 on both sides cooperate with the mounting surfaces 40 on both sides to form installation guides on both sides. The installation guides on both sides restrict the insertion direction of the pump head 1 relative to the pump body 2, thereby correcting the direction of the pump head 1's insertion into the pump body 2. This avoids the pump head 1 from shifting relative to the pump body 2 due to gravity, which could cause jamming or misfitting of the contact surfaces during the insertion process. On the one hand, this increases the probability of successful assembly of the pump head 1 when changing the conveyed material. On the other hand, it reduces the possibility of wear on the slots caused by the relative shift of the locking blocks 6 and the slots, thereby preventing wear debris from adhering to the pump head 1 and the pump body 2, reducing the difficulty of cleaning and disinfecting the pump head 1 and the pump body 2. At the same time, the above solution also prevents wear debris from entering the pump head 1 or the pump body 2 and affecting the stability of the plunger rod 3's movement.

[0043] The protrusion 4 has a first hole penetrating through its upper and lower end faces, and the stepped surface has a second hole. The first hole and the second hole are coaxially arranged. The connecting member 10 includes a column, which mates with both the first hole and the second hole. One end of the column can pass through the first hole and be located within the second hole. By passing through the first hole and falling into the second hole, the column locks the protrusion 4 relative to the step, 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 assembled together. The upper surface of the second base 202 is a stepped surface, and 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. The pump head 1 has a sidewall that mates 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. Furthermore, by replacing the second base 202 with different sizes, guide surfaces 20 can be formed at different positions, thereby facilitating the adjustment of the distance between the pump head 1 and the first base 201 and improving the adaptability to plunger rods 3 of different lengths.

[0045] Referring to Figures 5 and 6, the pump body 2 has a U-shaped cavity communicating with its outer wall. The pump head 1 and the pump body 2 have a channel, and the plunger rod 3 is fitted within the channel. The plunger rod 3 includes a first rod 31 and a second rod 32 that are detachably connected. The first rod 31 and the second rod 32 have a magnetic structure at the connection point, and the magnetic structure is located within the U-shaped cavity. The plunger rod 3 adopts a split design and is connected by a magnetic structure, which facilitates the segmented manufacturing of the plunger rod 3 and reduces manufacturing difficulty. The magnetic structure can be adjusted through the U-shaped cavity to disassemble the first rod 31 and the second rod 32. That is, after the first rod 31 and the second rod 32 are separated, when the pump head 1 is removed from the pump body 2 along the insertion direction, the pump head 1 carries the first rod 31 and the fitted second rod 32 in the pump body 2 through its internal channel to achieve separation. In other words, the first rod 31 and the second rod 32 can be radially separated by disassembling the pump head 1, which optimizes the disassembly steps, improves material replacement efficiency, and enhances the plunger's performance. The efficiency of the rod 3 split: After the pump head 1 is separated from the pump body 2, the first rod 31 that is set in the pump head 1 is taken out. The pump head 1 and the first rod 31 are cleaned and disinfected. Without replacing the plunger rod 3, the first rod 31 is assembled into the new pump head 1. The positioning of the first rod 31 and the second rod 32 can be achieved by inserting the pump head 1 into the pump body 2. Then, the connection between the first rod 31 and the second rod 32 can be achieved by adjusting the magnetic component. The first rod 31 does not need to be manually adjusted throughout the process, which reduces the possibility of secondary contamination of the first rod 31 after adjusting the flow rate or changing the material, and improves the cleanliness of the new material conveying.

[0046] One end of the first rod 31 is fitted inside the pump head 1, and the other end of the first rod 31 is fitted with a first magnetic element 7. The second rod 32 is fitted inside the pump body 2. One end of the second rod 32 is connected to the power mechanism, and the other end of the second rod 32 is fitted with a second magnetic element 8. The first magnetic element 7 and the second magnetic element 8 cooperate and attract each other.

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

[0048] The first magnetic component 7 has a first magnetic pole extending out of the first mounting hole 311, and the second magnetic component 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 31 and the second rod 32 at the connecting end can be adjusted, thereby adjusting the overall length of the plunger rod 3. This improves the adaptability to different specifications of pump heads 1 when replacing the pump head 1. At the same time, by adjusting the final axial length of the plunger rod 3, the starting position of the stroke of different plunger rods 3 in the same pump head 1 can be changed. Thus, the material conveying flow rate can be changed 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 insufficient contact between the first and second magnetic poles due to end-face contact at the connection point between the first rod 31 and the second rod 32, thus improving the stability of the magnetic connection between the first and second rods 31 and helping to stabilize the coaxiality of the two rods. On the other hand, the magnetic poles extending out of the mounting holes allow for a gap between the first and second rods 31 and the end face where the magnetic block is located, reducing the possibility of collision and wear between the end faces of the first and second rods 31 and the second rod 32 during assembly caused by vibration interference after the first magnetic component 7 and the second magnetic component 8 are attracted. This reduces the maintenance cost of the plunger rod 3 and the difficulty of assembling the plunger rod 3.

[0051] The above scheme creates a gap between the end faces of the first rod 31 and the second rod 32 at the connection point, which facilitates magnetic adjustment of the two magnetic blocks through the U-shaped cavity of the pump body 2, causing the first rod 31 and the second rod 32 to lose their connection. This achieves longitudinal separation of the pump head 1 and the pump body 2, while simultaneously separating the first rod 31 and the second rod 32 radially.

[0052] Referring to Figures 3 and 4, the guide surface 20 is smoothly connected to the guide surface 21 on the top. The guide surface 21 extends to the stepped surface and is inclined away from the protrusion 4. 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 of uniform depth, and the inclined surface 41 is provided with a guide block 42 that cooperates with the guide groove 22. The guide groove 22 is connected to the 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 inclined surface 41 provides a guide for the card block 6 to enter the card slot and provides 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 stepped surface and reach the area between the two inclined surfaces 41. Then, the orientation of the card block 6 is adjusted 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. This avoids the outer edge of the bottom end face of the card block 6 colliding with the stepped surface due to inaccurate positioning when the card block 6 enters the card slot, which would cause damage to the stepped surface. This also reduces the damage to the pump head 1 to the pump body 2 at the insertion end face when the flow rate is adjusted or the material is changed.

[0056] When the bottom of the locking block 6 contacts the bottom of the groove, the guide block 42 can contact the guide groove 22, thus supporting the guide block 42. That is, when the pump head 1 is connected to the pump body 2, the inclined surface 41 provides partial gravity support to the pump head 1 through the contact support between the guide groove 22 and the guide block 42. On the one hand, this reduces the impact force of the bottom of the locking block 6 on the bottom of the groove when the pump head 1 is inserted into the pump body 2, preventing damage to the locking block 6 and the bottom of the groove, which would prevent other pump heads 1 from being assembled on the pump body 2. On the other hand, it prevents the bottom of the groove from being deformed due to excessive impact force, which would cause misalignment of the internal channels after the pump head 1 and the pump body 2 are assembled, resulting in lateral interference to the plunger rod 3 during movement, affecting the life of the parts and the stability of material conveying.

[0057] Example 2: Based on Example 1 of this case, the first magnetic component 7 is a magnetic material, and the second magnetic component 8 is an electromagnet. The second magnetic component 8 can change its magnetic attraction ability by turning on and off the power.

[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 magnetically attracted to the second magnetic component 8 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 component 8 is energized, causing the second magnetic component 8 to lose its magnetism. At this time, the second magnetic component 8 loses its magnetic attraction to the first magnetic component 7, 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 present 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 its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A modular, detachable pump head with a magnetic plunger segment, comprising: A pump head (1) and a pump body (2), wherein a plunger rod (3) is provided inside the pump head (1) and the pump body (2), characterized in that: 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 connector (10) at the connection point, the upper end of the pump body (2) has a recessed step, the upper part of the pump head (1) has a protrusion (4), the protrusion (4) cooperates with the step, and the... The step has a stepped surface that mates with the bottom surface of the protrusion (4). The connector (10) passes through the protrusion (4) and extends below the stepped surface. The pump body (2) has a guide surface (20) inside on the side of the stepped surface. The protrusion (4) has a mounting surface (40) on the bottom side. The mounting surface (40) mates with the guide surface (20) and can slide relative to it. A groove (5) is provided on the guide surface (20). The upper end of the groove (5) extends through to the stepped surface, and the lower end of the groove (5) has a groove bottom. The bottom of the groove supports the pump head (1), and the mounting surface (40) has a locking block (6) that mates with the groove body (5). The locking block (6) can be inserted into the groove body (5) through the stepped surface. The pump body (2) includes a first base (201) and a second base (202) that are assembled and connected. The upper end surface of the second base (202) is the stepped surface, and the inner wall surface of the second base (202) is the guide surface (20). The second base (202) has a surface that is adjacent to and perpendicular to the guide surface (20). The pump head (1) has a sidewall that mates with the guide surface (20) and the vertical surface. The pump body (2) has a U-shaped cavity that communicates with its outer wall surface. The pump head (1) and the pump body (2) have a channel. The plunger rod (3) mates within the channel. 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. The magnetic structure is located within the U-shaped cavity.

2. The detachable pump head with segmented magnetic plunger according to claim 1, characterized in that: There are at least two steps and they are symmetrically distributed on opposite sides inside the pump body (2). The number of protrusions (4) corresponds 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 located at one end of the pump head (1) near the pump body (2).

3. The detachable pump head with segmented magnetic plunger according to claim 1, characterized in that: The protrusion (4) has a first hole that penetrates the upper and lower end faces, and the stepped surface has a second hole. The first hole and the second hole are coaxially arranged. The connector (10) includes a column. The column cooperates with the first hole and the second hole. One end of the column can pass through the first hole and be located in the second hole.

4. The detachable pump head with segmented magnetic plunger according to claim 1, characterized in that: One end of the first rod (31) is fitted inside the pump head (1), and the other end of the first rod (31) is fitted with a first magnetic element (7). The second rod (32) is fitted inside the pump body (2). One end of the second rod (32) is connected to the power mechanism, and the other end of the second rod (32) is fitted with a second magnetic element (8). The first magnetic element (7) and the second magnetic element (8) cooperate and attract each other.

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