Butt joint type segmented plunger rod flange clamp split pump head

Abstract

The invention discloses a butt joint type segmented plunger rod flange clamp split pump head, and belongs to the technical field of plunger pumps, the flange clamp split pump head comprises a pump head, one side of the pump head is detachably connected with a pump body, an assembly part is arranged on the outer side of the joint of the pump head and the pump body, and the assembly part is provided with a clamp body making contact with the pump head and the outer surface of the pump body. A first guide part is arranged on the outer side of the pump head, a second guide part matched with the first guide part is arranged on the outer side of the pump body, and the clamping body surrounds the peripheries of the first guide part and the second guide part and is used for clamping the first guide part and the second guide part at the matched position. The pump head can be quickly and stably disassembled and assembled on the premise that the driving end is not replaced, the replacement efficiency of material replacement and transportation is improved, and the cleaning and disinfection difficulty is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a butt-jointed segmented plunger rod flange clamp split pump head. 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: A butt-jointed segmented plunger rod flange clamp split pump head includes a pump head, which is detachably connected to a pump body on one side, and an assembly part is provided on the outside of the connection between the pump head and the pump body, and the assembly part has a clamp body that contacts the pump head and the outer surface of the pump body. The detachable connection scheme between the pump head and the pump body can realize the rapid separation of the two and the replacement of their internal components, solving the problem of the difficulty of disassembling the plunger pump and the cost of replacing the plunger pump parts. The assembly part is arranged on the outside of the connection between the pump head and the pump body, ensuring that the pump head and the pump body are continuously and tightly connected, while solving the problem that the pump head and the pump body need to be provided with threaded connection holes, which leads to a reduction in the structural strength of the pump head and the pump body, and also reduces the problem of the difficulty of processing the pump head and the pump body.

[0007] Preferably, the pump head includes a first guide portion on the outside, the pump body includes a second guide portion on the outside that cooperates with the first guide portion, and the clamp body surrounds the periphery of the first guide portion and the second guide portion, and the clamp body is used to clamp the first guide portion and the second guide portion at the cooperation point. The cooperation between the first guide portion and the second guide portion expands the contact area at the connection between the pump head and the pump body, which helps to improve the tightness of the connection between the pump head and the pump body, and reduces the risk of the medium leaking into the pump body due to pressure during the medium conveying process of the pump head; the clamp body as a whole surrounds the outside of the combination of the first guide portion and the second guide portion. On the one hand, it clamps the first guide portion and the second guide portion to improve the assembly tightness of the pump body and the pump head. On the other hand, the clamp body forms an external seal at the connection between the first guide portion and the second guide portion, reducing the possibility of a gap at the connection between the pump body and the pump head affecting the internal pressure, thereby avoiding the occurrence of unstable medium conveying; The first guide portion and the second guide portion are surrounded by the clamping body after contacting, which is conducive to achieving the alignment degree of the first guide portion and the second guide portion when the contact flatness of the first guide portion and the second guide portion is not high, that is, the outer surfaces of the first guide portion and the second guide portion are aligned by the surrounding clamping body, thereby improving the assembly accuracy of the pump body and the pump head, reducing the possibility of misalignment between the first guide portion and the second guide portion, thereby reducing the possibility of motion interference of the internal moving elements of the plunger pump on the side, reducing the wear of the moving elements, increasing the service life, and stabilizing the medium conveying efficiency; The above-mentioned pump body and pump head can realize the disassembly of the pump head on the pump body by eliminating the restriction of the clamping body outside the first guide part and the second guide part. The pump head can be removed and replaced without disassembling the driving part, thereby reducing the downtime of the plunger pump caused by adjusting the flow rate and improving the working efficiency of the plunger pump.

[0008] Preferably, the pump head has a through hole in which a plunger rod is arranged in cooperation, the plunger rod has a first rod body and a second rod body that are detachably connected, a positioning piece is provided at the connection between the first rod body and the second rod body, and the pump head has a mounting hole in which the positioning piece can be placed. The first rod body and the second rod body can be assembled to form a plunger rod as a whole through the positioning piece, that is, the driving end and the pumping end of the plunger rod can be manufactured in sections, realizing modular production, reducing manufacturing costs and manufacturing difficulty, and improving production efficiency in the production process of the plunger rod.

[0009] Preferably, the pump head includes a first pump head and a second pump head, the first guide portion is located outside the first pump head, the first pump head is respectively connected to the second pump head and the pump body, the through hole includes a first hole body located inside the first pump head, the mounting hole connects the outside of the first pump head with the first hole body, and the positioning member can enter and exit the mounting hole to achieve the connection between the first rod body and the second rod body. The positioning member can move in the mounting hole, and when the first rod body and the second rod body are assembled, the positioning member can be quickly removed from the mounting hole, thereby achieving the relative release of the first rod body and the second rod body. The operator can first remove the clamp to cancel the position limit of the pump body and the pump body, and then remove the positioning member and remove it from the mounting hole to cancel the position limit of the first rod body and the second rod body. At this time, the pump body is separated from the pump head, and the first rod body and the second rod body can be separated. On the one hand, the above scheme facilitates the segmented disassembly of the plunger rod while disassembling the pump head, thereby reducing the damage to the plunger when shutting down or changing the conveying material. The difficulty of disassembling the rod and the difficulty of cleaning and disinfecting it. On the other hand, the first rod body and the second rod body are separated along with the disassembly of the pump body and the pump head, that is, the plunger rod is disassembled in sections while the pump head is separated from the pump body, thereby improving the disassembly efficiency of the segmented plunger rod. At the same time, the segmented plunger rod can shorten the moving distance of the pump head relative to the pump body along the axial direction of the plunger rod during the separation process, thereby reducing the difficulty of disassembly, increasing the speed of the material replacement process, and also reducing the moving space that needs to be reserved for each component when the plunger pump is disassembled, thereby reducing the site requirements for disassembly and replacement of the plunger pump and improving the adaptability of disassembly in different work sites.

[0010] After the pump head is disassembled, the first rod body and the second rod body are taken out respectively, that is, the plunger rod can be taken out along with the disassembly of the pump head, which is convenient for disassembly of the plunger rod when stopping or changing the conveying material, and improves the convenience of cleaning and disinfecting the plunger rod; because the mounting hole extends from the outer wall of the pump head to the first through hole inside it and is connected, that is, after the positioning member enters the mounting hole and forms a connection between the first rod body and the second rod body, the positioning member can move in the first through hole along with the first rod body and the second rod body. When the first rod body and the second rod body need to be disassembled, the connection between the first rod body and the second rod body can be released by taking the positioning member in the first hole body out of the mounting hole, and at this time, it is in the pump body.

[0011] Preferably, a groove is provided on the end surface of one end of the first rod body, and a protrusion is provided on the end surface of one end of the second rod body to cooperate with the groove, and the protrusion can be inserted into the groove. The protrusion can be inserted into the groove to realize the rapid assembly of the first rod body and the second rod body, and at the same time provide a guide for the assembly of the plunger rod, thereby accelerating the assembly efficiency of the plunger rod; The plug-in assembly method of the protrusion and the groove makes it easy for the first rod body and the second rod body to move away from each other as the pump head and the pump body are separated. The pump head and the pump body, the first rod body and the second rod body can be disassembled synchronously without performing other operations, thereby improving the disassembly efficiency when the conveying medium is replaced or the machine is shut down, optimizing the disassembly process, and lowering the operating threshold.

[0012] Preferably, the first rod body is provided with a first plug hole on the outer side wall, the first plug hole is connected to the groove, the protrusion has a second plug hole, and the positioning member can pass through and be arranged in the first plug hole and the second plug hole. The positioning member realizes the displacement restriction in the axial direction after the first rod body is connected to the second rod body by passing through the first plug hole and the second plug hole, and also reduces the possibility of the first rod body rotating relative to the second rod body along the axial direction, thereby ensuring the coaxiality of the first rod body and the second rod body after assembly, reducing the collision interference between the first rod body and the second rod body during movement caused by the deviation of the assembly position, and improving the stability of medium transportation; The above solution ensures that the first rod body and the second rod body can be coaxially assembled, which helps to improve the straightness of the entire plunger rod moving in the pump head, thereby improving the oil film characteristics of the plunger rod at the position contacting the medium.

[0013] Preferably, the protrusion is a cylindrical column, and the groove is a cylindrical groove body. The protrusion and the groove have a colinear central axis, and the center lines of the first plug hole, the second plug hole and the mounting hole can overlap and be perpendicular to the central axis. The cylindrical protrusion is inserted into the cylindrical groove, which can ensure the force balance between the first rod body and the second rod body at the connection point, and can avoid the possibility of the protrusion being worn or broken by the offset force in the groove when the plunger pump is subject to motion interference, thereby improving the overall structural strength of the combined plunger rod; the hole axis of the first plug hole and the second plug hole is perpendicular to the central axis of the protrusion and the groove, shortening the hole extension distance of the first plug hole and the second plug hole, which can reduce the impact of the opening on the structural strength of the plunger rod, and at the same time facilitate the removal of the positioning member in the first plug hole and the second plug hole; The first plug hole, the second plug hole and the mounting hole can overlap in position, so that the position of the locating piece in the first hole body can be observed through the port of the mounting hole located on the outer wall of the pump head, thereby ensuring a smooth removal process of the locating piece and reducing the risk of scratching the first rod body, the second rod body and the pump head during the removal process of the locating piece due to positional deviation.

[0014] Preferably, a block is provided on the side of the protrusion along the insertion direction, and the groove has a slot that matches the block, so that the block can enter the slot along the insertion direction of the protrusion. The arrangement of the block and the slot provides a guide for the protrusion to be inserted into the groove, which accelerates the assembly efficiency of the first rod body and the second rod body, and due to the limiting effect of the block in the slot, it can ensure that the posture of the first rod body relative to the second rod body is stable in the absence of a positioning member, and ensure that the first plug hole and the second plug hole can always be aligned, on the one hand, the probability of smooth insertion of the positioning member is increased, and the success rate of assembly is increased, on the other hand, the first rod body and the second rod body form a rotation restriction through the block and the slot, which reduces the relative torsion of the first rod body relative to the second rod body caused by motion interference, resulting in the possibility of the positioning member being pressed in the first plug hole and the second plug hole and being worn or broken, thereby improving the movement stability of the assembled plunger rod and the safety of medium transportation, and also reducing the maintenance cost caused by the wear of the positioning member.

[0015] Preferably, the second pump head has a second hole body at the connecting end which is coaxial with and connected to the first hole body, the plunger rod can move axially in the second hole body, and the second pump head has a built-in transport cavity which is connected to the second hole body.

[0016] Preferably, a sealing groove is provided at the end of the second hole body close to the first pump head, and a sealing assembly cooperating with the plunger rod is provided in the sealing groove, and the sealing assembly surrounds the plunger rod. The sealing assembly surrounds the plunger rod, and when the pump body is separated from the pump head, the pump head can synchronously carry the second rod body away from the pump body through the sealing assembly, that is, the pump head carries the second rod body away from the pump body and the first rod body relatively, so that the first rod body is separated from the pump head and the pump body, and the first rod body is separated from the second rod body, which optimizes the steps of disassembling the non-driving end of the plunger pump and improves the disassembly efficiency of the plunger rod and the pump head; during assembly, the pump head and the pump body are combined through the cooperation of the first guide part and the second guide part. In this process, the pump head synchronously carries the second rod body close to the first rod body in the pump body through the sealing assembly, that is, the cooperation action of the first guide part and the second guide part and the plugging action of the second rod body in the first rod body cooperate with each other to form auxiliary positioning, which enhances the accuracy of the initial positioning of the pump head and the pump body combination, reduces the wear caused by the inclination of the contact surfaces during the combination process, and similarly, can also reduce the contact wear during the disassembly process.

[0017] Since the present invention adopts a detachable segmented plunger rod, it has the following beneficial effects: the pump head and the pump body and their internal components can be quickly disassembled through the assembly parts, which solves the problems of difficulty in disassembling the plunger pump and the cost of replacing components; the assembly parts can remove the pump head for replacement without disassembling the driving part, which reduces the downtime caused by adjusting the flow rate and improves work efficiency; the detachably connected first rod body and the second rod body are assembled through the positioning part, which reduces the manufacturing cost and difficulty; the segmented plunger rod reduces the moving space required for component disassembly and improves the adaptability of disassembly in different work sites; when separating the pump head and the pump body, the disassembly between the rod bodies can be achieved synchronously, which reduces the difficulty of disassembling the plunger rod and the difficulty of cleaning and disinfecting when changing the conveying material. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the external structure of a butt-jointed segmented plunger rod flange clamp split pump head; Figure 2 It is a top view schematic diagram of a butt-jointed segmented plunger rod flange clamp split pump head; Figure 3 for Figure 2 Schematic cross-sectional view in the AA direction; Figure 4 for Figure 3 A magnified schematic diagram of the middle A area; Figure 5 Schematic diagram of the plunger rod structure; Figure 6 It is a schematic diagram of the assembly structure.

[0019] Figure numbers: pump head 1; pump body 2; assembly part 3; plunger rod 4; positioning part 5; block 6; slot 7; first guide part 10; first pump head 11; second pump head 12; second guide part 20; first rod body 41; second rod body 42; mounting hole 50; groove 410; first plug hole 411; protrusion 420; second plug hole 421; arc clamp 31; protrusion 32; connecting rod 33; fastener 34. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described in detail below in conjunction with specific implementations and drawings: 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.

[0021] Embodiment 1: See attached Figure 1 - Attachment Figure 3A butt-jointed segmented plunger rod flange clamp split pump head comprises a pump head 1, which is detachably connected to a pump body 2 on one side, and an assembly part 3 is provided on the outside of the connection between the pump head 1 and the pump body 2, wherein the assembly part 3 has a clamping body contacting the outer surfaces of the pump head 1 and the pump body 2.

[0022] The detachable connection scheme between the pump head 1 and the pump body 2 can realize the rapid disassembly of the two and the replacement of their internal components, thereby solving the problem of difficulty in disassembling the plunger pump and the cost of replacing the plunger pump parts. The assembly part 3 is arranged on the outside of the connection between the pump head 1 and the pump body 2, ensuring that the pump head 1 and the pump body 2 are continuously and tightly connected, while solving the problem of the need to set threaded connection holes on the pump head 1 and the pump body 2, which leads to a decrease in the structural strength of the pump head 1 and the pump body 2, and also reduces the problem of the difficulty in processing the pump head 1 and the pump body 2.

[0023] The pump head 1 includes an outer first guide portion 10, the pump body 2 includes an outer second guide portion 20 that cooperates with the first guide portion 10, and the clamp surrounds the first guide portion 10 and the second guide portion 20, and the clamp is used to clamp the first guide portion 10 and the second guide portion 20 at the matching position.

[0024] The first guide portion 10 and the second guide portion 20 have a circular ring body, the first guide portion 10 has a first guide surface at the outer edge, and the second guide portion 20 has a second guide surface at the outer edge. The first guide surface and the second guide surface are both conical surfaces and approach each other at the outer edges, and the clamping body has an inner contour that matches the first guide surface and the second guide surface.

[0025] The first guide surface and the second guide surface are close to each other to form conical surfaces on their respective guide parts. The clamp body can better realize the installation guidance outside the first guide part 10 and the second guide part 20 through the inner contour, thereby improving the efficiency of assembling the pump head 1 and the pump body 2; since the first guide surface and the second guide surface are conical surfaces, when the clamp body is in close contact with the first guide surface and the second guide surface through the inner contour, the first guide part 10 and the second guide part 20 can be squeezed toward each other through the conical surface, and at the same time, it can also ensure that the outer edges of the first guide part 10 and the second guide part 20 can be aligned under the contact action of the inner contour, so that the pump head 1 and the pump body 2 can be quickly aligned and tightly matched in the connection direction during assembly, thereby improving the accuracy and efficiency of assembly after replacing the pump head 1.

[0026] The cooperation between the first guide portion 10 and the second guide portion 20 expands the contact area at the connection between the pump head 1 and the pump body 2, which helps to improve the tightness of the connection between the pump head 1 and the pump body 2, and reduces the risk of the medium leaking to the pump body 2 under the influence of pressure during the medium conveying process of the pump head 1; the clamping body as a whole surrounds the outer side of the first guide portion 10 and the second guide portion 20 after they are combined. On the one hand, the first guide portion 10 and the second guide portion 20 are clamped to improve the tightness of the assembly of the pump body 2 and the pump head 1; on the other hand, the clamping body forms an external seal at the connection between the first guide portion 10 and the second guide portion 20, reducing the possibility of a gap at the connection between the pump body 2 and the pump head 1 affecting the internal pressure, thereby avoiding the occurrence of unstable medium conveying; The first guide portion 10 and the second guide portion 20 are surrounded by the clamp after contact, which is conducive to achieving the alignment degree of the first guide portion 10 and the second guide portion 20 when the contact flatness of the first guide portion 10 and the second guide portion 20 is not high, that is, the outer surfaces of the first guide portion 10 and the second guide portion 20 are aligned by the surrounding clamp, thereby improving the assembly accuracy of the pump body 2 and the pump head 1, reducing the possibility of misalignment between the first guide portion 10 and the second guide portion 20, thereby reducing the possibility of motion interference of the internal moving elements of the plunger pump on the side, reducing the wear of the moving elements, increasing the service life, and stabilizing the medium delivery efficiency; The pump body 2 and the pump head 1 can be disassembled from the pump body 2 by removing the restriction of the clamp outside the first guide portion 10 and the second guide portion 20. The pump head 1 can be removed and replaced without disassembling the driving part, thereby reducing the downtime of the plunger pump caused by adjusting the flow rate and improving the working efficiency of the plunger pump.

[0027] See attached Figure 4 - Attachment Figure 5 The pump head 1 has a through hole in which a plunger rod 4 is arranged in cooperation. The plunger rod 4 has a first rod body 41 and a second rod body 42 that are detachably connected. A positioning member 5 is provided at the connection between the first rod body 41 and the second rod body 42. The pump head 1 has a mounting hole 50 in which the positioning member 5 can be placed. The first rod body 41 and the second rod body 42 can be assembled through the positioning member 5 to form the plunger rod 4 as a whole, that is, the driving end and the pumping end of the plunger rod 4 can be manufactured in sections, realizing modular production, reducing manufacturing costs and manufacturing difficulties, and improving production efficiency in the production process of the plunger rod 4.

[0028] The pump head 1 includes a first pump head 11 and a second pump head 12. The first guide portion 10 is located outside the first pump head 11. The first pump head 11 is respectively connected to the second pump head 12 and the pump body 2. The through hole includes a first hole body located inside the first pump head 11. The mounting hole 50 connects the outside of the first pump head 11 with the first hole body. The positioning member 5 can enter and exit the mounting hole 50 to realize the connection between the first rod body 41 and the second rod body 42.

[0029] The positioning member 5 can move in the mounting hole 50. When the first rod body 41 and the second rod body 42 are assembled, the positioning member 5 can be quickly taken out from the mounting hole 50, thereby realizing the relative release of the first rod body 41 and the second rod body 42. The operator can first cancel the position restriction of the pump body 2 and the pump body by removing the clamp, and then cancel the position restriction of the first rod body 41 and the second rod body 42 by removing the positioning member 5 and taking it out from the mounting hole 50. At this time, the pump body 2 is separated from the pump head 1, and the first rod body 41 and the second rod body 42 can be separated. On the one hand, the above scheme facilitates the segmented disassembly of the plunger rod 4 while disassembling the pump head 1, thereby reducing downtime or replacement. When conveying materials, it is difficult to disassemble, clean and disinfect the plunger rod 4. On the other hand, the first rod body 41 and the second rod body 42 are separated along with the disassembly of the pump body 2 and the pump head 1, that is, the plunger rod 4 is disassembled in sections while the pump head 1 is separated from the pump body 2, thereby improving the disassembly efficiency of the segmented plunger rod 4. At the same time, the segmented plunger rod 4 can shorten the moving distance of the pump head 1 relative to the pump body 2 along the axial direction of the plunger rod 4 during the separation process, thereby reducing the difficulty of disassembly, increasing the speed of the material replacement process, and also reducing the moving space that needs to be reserved for each component when the plunger pump is disassembled, thereby reducing the site requirements for disassembly and replacement of the plunger pump, and improving the adaptability of disassembly in different work sites.

[0030] After the pump head 1 is disassembled, the first rod body 41 and the second rod body 42 are taken out respectively, that is, the plunger rod 4 can be taken out along with the disassembly of the pump head 1, which is convenient for disassembly of the plunger rod 4 when shutting down or changing the conveying material, and improves the convenience of cleaning and disinfecting the plunger rod 4; because the mounting hole 50 extends from the outer wall of the pump head 1 to the first through hole inside it and is connected, that is, after the positioning member 5 enters the mounting hole 50 and forms a connection between the first rod body 41 and the second rod body 42, the positioning member 5 can move in the first through hole with the first rod body 41 and the second rod body 42. When the first rod body 41 and the second rod body 42 need to be disassembled, the connection between the first rod body 41 and the second rod body 42 can be released by taking the positioning member 5 in the first hole body out of the mounting hole 50, and at this time in the pump body 2.

[0031] The end surface of one end of the first rod body 41 has a groove 410, and the end surface of one end of the second rod body 42 has a protrusion 420 arranged to cooperate with the groove 410, and the protrusion 420 can be inserted into the groove 410. The first rod body 41 and the second rod body 42 can be quickly assembled by inserting the protrusion 420 into the groove 410, and at the same time provide a guide for the assembly of the plunger rod 4, thereby accelerating the assembly efficiency of the plunger rod 4; The plug-in assembly method of the protrusion 420 and the groove 410 makes it easy for the first rod body 41 and the second rod body 42 to move away from each other as the pump head 1 and the pump body 2 are separated. The pump head 1 and the pump body 2, the first rod body 41 and the second rod body 42 can be disassembled synchronously without performing other operations, thereby improving the disassembly efficiency when the conveying medium is replaced or shut down, optimizing the disassembly process, and lowering the operating threshold.

[0032] The first rod body 41 has a first insertion hole 411 on the outer wall thereof. The first insertion hole 411 is connected to the groove 410 . The protrusion 420 has a second insertion hole 421 . The positioning member 5 can pass through and be matched in the first insertion hole 411 and the second insertion hole 421 .

[0033] The positioning member 5 passes through the first plug hole 411 and the second plug hole 421 to limit the displacement of the first rod body 41 and the second rod body 42 in the axial direction after they are connected, and also reduces the possibility of the first rod body 41 rotating relative to the second rod body 42 in the axial direction, thereby ensuring the coaxiality of the first rod body 41 and the second rod body 42 after assembly, reducing the collision interference between the first rod body 41 and the second rod body 42 during movement caused by the assembly position deviation, and improving the stability of medium transportation; The above solution ensures that the first rod body 41 and the second rod body 42 can be coaxially assembled, which helps to improve the straightness of the entire plunger rod 4 moving in the pump head 1, thereby improving the oil film characteristics of the plunger rod 4 at the position contacting the medium.

[0034] The protrusion 420 is a cylindrical column, the groove 410 is a cylindrical groove, the protrusion 420 and the groove 410 have a colinear central axis, and the center lines of the first plug hole 411, the second plug hole 421 and the installation hole 50 can overlap and be perpendicular to the central axis.

[0035] The cylindrical protrusion 420 is inserted into the cylindrical groove 410, which can ensure the balanced force between the first rod body 41 and the second rod body 42 at the connection point, and can avoid the possibility of the protrusion 420 being worn or broken in the groove 410 due to the biased load when the plunger pump is subject to motion interference, thereby improving the overall structural strength of the combined plunger rod 4; the hole axes of the first plug hole 411 and the second plug hole 421 are perpendicular to the central axes of the protrusion 420 and the groove 410, shortening the hole extension distance of the first plug hole 411 and the second plug hole 421, which can reduce the influence of the opening on the structural strength of the plunger rod 4, and at the same time facilitate the removal of the positioning member 5 from the first plug hole 411 and the second plug hole 421; The first insertion hole 411, the second insertion hole 421 and the mounting hole 50 can overlap in position, so that the position of the positioning member 5 in the first hole body can be observed through the port of the mounting hole 50 located on the outer wall of the pump head 1, thereby ensuring a smooth removal process of the positioning member 5 and reducing the risk of scratching the first rod body 41, the second rod body 42 and the pump head 1 during the removal process of the positioning member 5 due to positional deviation.

[0036] A block 6 is provided on the side of the protrusion 420 along the insertion direction, and the groove 410 has a slot 7 that matches the block 6 . The block 6 can enter the slot 7 along the insertion direction of the protrusion 420 . The arrangement of the block 6 and the slot 7 provides guidance for the insertion of the protrusion 420 into the groove 410, thereby accelerating the assembly efficiency of the first rod 41 and the second rod 42. In addition, due to the limiting effect of the block 6 in the slot 7, it is possible to ensure that the posture of the first rod 41 relative to the second rod 42 is stable in the absence of the positioning member 5, that is, to ensure that the first socket 411 and the second socket 421 can always be aligned. On the one hand, the probability of smooth insertion of the positioning member 5 is improved, and the success rate of assembly is improved. On the other hand, the first rod 41 and the second rod 42 form a rotation restriction through the block 6 and the slot 7, thereby reducing the relative torsion of the first rod 41 relative to the second rod 42 caused by motion interference, resulting in the possibility of the positioning member 5 being compressed in the first socket 411 and the second socket 421 and being worn or broken, thereby improving the movement stability of the assembled plunger rod 4 and the safety of medium transportation, while also reducing the maintenance cost caused by the wear of the positioning member 5.

[0037] The second pump head 12 has a second hole body at the connecting end that is coaxial with and connected to the first hole body. The plunger rod 4 can move axially in the second hole body. The second pump head 12 has a built-in transport cavity that is connected to the second hole body.

[0038] A sealing groove is provided at the end of the second hole body close to the first pump head 11 . A sealing component matched with the plunger rod 4 is provided in the sealing groove. The sealing component surrounds the plunger rod 4 . The sealing assembly surrounds the plunger rod 4. When the pump body 2 is separated from the pump head 1, the pump head 1 can synchronously carry the second rod 42 away from the pump body 2 through the sealing assembly, that is, the pump head 1 carries the second rod 42 away from the pump body 2 and the first rod 41, so that the pump head 1 is separated from the pump body 2 and the first rod 41 is relatively separated from the pump body 2, thereby optimizing the steps of disassembling the non-driving end of the plunger pump and improving the disassembly efficiency of the plunger rod 4 and the pump head 1; during assembly, the pump head 1 and the pump body 2 are combined through the cooperation of the first guide portion 10 and the second guide portion 20. During this process, the pump head 1 synchronously carries the second rod 42 close to the first rod 41 in the pump body 2 through the sealing assembly, that is, the cooperation action of the first guide portion 10 and the second guide portion 20 and the plugging action of the second rod 42 in the first rod 41 cooperate with each other to form auxiliary positioning, thereby enhancing the accuracy of the initial positioning of the combination of the pump head 1 and the pump body 2, reducing the wear caused by the inclination of the contact surfaces during the combination process, thereby reducing the contact wear during the assembly process, and similarly, reducing the contact wear during the disassembly process.

[0039] Embodiment 2: See attached Figure 6On the basis of the first embodiment of the present invention, the clamp body includes two symmetrically arranged arc clamps 31, the two arc clamps 31 are hinged at one end, and the two arc clamps 31 have a protrusion 32 at the non-hinged end, each protrusion 32 has a U-shaped opening on the side wall, a connecting rod 33 is provided in the U-shaped opening, and a fastener 34 is provided on the connecting rod 33, and the fastener 34 can bring the two protrusions 32 closer.

[0040] The connecting rod 33 has a connecting end and a free end. The connecting end is installed in one of the U-shaped openings, and the connecting rod 33 can enter the other U-shaped opening. The fastener 34 is sleeved outside the connecting rod 33 and the two are threadedly connected. The fastener 34 squeezes the protrusion 32 near the free end.

[0041] During assembly, the two arc clamps 31 are opened at the hinge; one of the arc clamps 31 is covered on one side outside the first guide part 10 and the second guide part 20 to form an initial positioning; the other arc clamp 31 is swung at the hinge to cover the other side outside the first guide part 10 and the second guide part 20 to form a secondary positioning; during the swinging process of the arc clamp 31, the connecting rod 33 passes through the U-shaped opening on the protrusion 32 of the swinging arc clamp 31; the fastener 34 is inserted through the free end of the connecting rod 33, and the fastener 34 is rotated to approach and squeeze the protrusion 32 near the free end on the connecting rod 33, so that the two protrusions 32 are close to each other, thereby realizing the connection of the two arc clamps 31 outside the first guide part 10 and the second guide part 20, thereby realizing the assembly of the pump body 2 and the pump head 1.

[0042] During disassembly, the fastener 34 is rotated in the opposite direction to lose the tension between the protrusions 32, and one of the arc clamps 31 is swung at the hinge to open the two arc clamps 31 to each other and disengage from the first guide portion 10 and the second guide portion 20; at this time, the pump head 1 and the pump body 2 lose the assembly restriction, the positioning member 5 between the first rod body 41 and the second rod body 42 is removed through the mounting hole 50, and the positioning member 5 is taken out through the mounting hole 50, at this time, the first rod body 41 and the second rod body 42 lose the assembly restriction, the pump head 1 carrying the second rod body 42 is separated from the pump body 2 carrying the first rod body 41, thereby realizing the synchronous and rapid disassembly of the pump head 1, the pump body 2, the first rod body 41 and the second rod body 42.

[0043] When the two arc clamps 31 swing relative to each other, the positions of the two protrusions 32 can correspond through the cooperation of the connecting rod 33 in the U-shaped opening, which improves the convenience of the arc clamps 31 to cooperate and clamp each other during the assembly process, and is conducive to the rapid assembly of the pump head 1 and the pump body 2.

[0044] The connecting rod 33 is directly fixed in the U-shaped opening of one of the protrusions 32 through the connecting end, which solves the problem of finding an additional pin for positioning when clamping the protrusion 32, simplifies the structure of the assembly part 3, reduces the number of parts of the assembly part 3, and improves the convenience of operation.

[0045] The engagement of the connecting rod 33 in the two protrusions 32 can also enable the two arc clamps 31 to swing in a predetermined path. By observing whether the connecting rod 33 can be engaged in the U-shaped opening, it can be determined whether the two arc clamps 31 are offset at the hinge, thereby realizing a quick determination of whether there is a problem with the assembly part 3, optimizing the quality inspection of parts before assembling the plunger pump, and improving the efficiency of inspection before assembling the plunger pump.

[0046] 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 butt-jointed segmented plunger rod flange clamp split pump head, comprising: A pump head (1), wherein the pump head (1) is detachably connected to a pump body (2) on one side, and is characterized in that an assembly part (3) is provided on the outside of the connection between the pump head (1) and the pump body (2), and the assembly part (3) has a clamping body that contacts the outer surfaces of the pump head (1) and the pump body (2).

2. According to claim 1, a butt-jointed segmented plunger rod flange clamp split pump head is characterized in that: The pump head (1) comprises a first guide portion (10) on the outside, the pump body (2) comprises a second guide portion (20) on the outside that cooperates with the first guide portion (10), the clamping body surrounds the first guide portion (10) and the second guide portion (21), and the clamping body is used to clamp the first guide portion (10) and the second guide portion (21) at the cooperation position.

3. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 2, characterized in that: The pump head (1) has a through hole in it, a plunger rod (4) is arranged in the through hole, the plunger rod (4) has a first rod body (41) and a second rod body (42) which are detachably connected, a positioning piece (5) is provided at the connection between the first rod body (41) and the second rod body (42), and the pump head (1) has a mounting hole (50) in which the positioning piece (5) can be placed.

4. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 3 is characterized by: The pump head (1) comprises a first pump head (11) and a second pump head (12); the first guide portion (10) is located outside the first pump head (11); the first pump head (11) is respectively connected to the second pump head (12) and the pump body (2); the through hole comprises a first hole body located inside the first pump head (11); the mounting hole (50) connects the outside of the first pump head (11) with the first hole body; the positioning member (5) can enter and exit the mounting hole (50) to realize the connection between the first rod body (41) and the second rod body (42).

5. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 3, characterized in that: The end surface of one end of the first rod body (41) has a groove (410), and the end surface of one end of the second rod body (42) has a protrusion (420) arranged to cooperate with the groove (410), and the protrusion (420) can be inserted into the groove (410) along the extension direction of the first rod body (41).

6. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 5, characterized in that: The first rod body (41) is provided with a first plug hole (411) on the outer side wall, the first plug hole (411) is connected to the groove (410), the protrusion (420) has a second plug hole (421), and the positioning member (5) can pass through and be arranged in the first plug hole (411) and the second plug hole (421).

7. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 6, characterized in that: The protrusion (420) is a cylindrical column, the groove (410) is a cylindrical slot, the protrusion (420) and the groove (410) have a colinear central axis, and the center lines of the first plug hole (411), the second plug hole (421) and the mounting hole (50) can overlap and are perpendicular to the central axis.

8. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 5, characterized in that: A block (6) is arranged on the side of the protrusion (420) along the insertion direction, and the groove (410) has a slot (7) that cooperates with the block (6), and the block (6) can enter the slot (7) along the insertion direction of the protrusion (420).

9. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 4, characterized in that: The second pump head (12) has a second hole body at the connection end which is coaxial with and connected to the first hole body, the plunger rod (4) can move axially in the second hole body, and the second pump head (12) has a built-in transport cavity which is connected to the second hole body.

10. The butt-jointed segmented plunger rod flange clamp split pump head according to claim 9, characterized in that: A sealing groove is provided at the end of the second hole body close to the first pump head (11), and a sealing component (8) cooperating with the plunger rod (4) is provided in the sealing groove, and the sealing component (8) surrounds the plunger rod (4).

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