A flange clamp split pump head with slot-type segmented plunger rod

Abstract

The present invention discloses a flange clamp split pump head of a slot-type segmented plunger rod, belonging to the technical field of plunger pumps. The flange clamp split pump head comprises a pump head and a pump body that are assembled and connected, and a plunger rod is arranged in the pump head and the pump body, and the plunger rod comprises a first rod body and a second rod body, and one end of the first rod body has a holder, and the end of the second rod body close to the holder has a slot, and the holder can be inserted into the slot and matched along the radial direction of the first rod body. The plunger rod of the present invention is divided into multiple detachable rod bodies, and the rod bodies are connected by radial plug-in connection, which is convenient for assembly and can realize the plunger pump to efficiently and stably transport the medium.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a flange clamp split pump head of a slot-type segmented plunger rod. 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 flange clamp split pump head with a slot-type segmented plunger rod, which is convenient for assembly and disassembly and can improve the medium conveying accuracy.

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

[0007] A flange clamp split pump head with a slot-type segmented plunger rod comprises: a pump head and a pump body that are assembled and connected, a plunger rod is arranged in the pump head and the pump body, the plunger rod comprises a first rod body and a second rod body, one end of the first rod body has a socket, and the end of the second rod body close to the socket has a slot, and the socket can be inserted into the slot and matched along the radial direction of the first rod body. By inserting the holder into the slot radially and matching them, a connection between the first rod body and the second rod body at the end is formed. In this solution, the plunger rod is assembled from the split first rod body and the second rod body, which can realize modular manufacturing of the plunger rod and reduce the manufacturing difficulty of the plunger rod; the above solution does not require additional connecting parts to realize rapid assembly of the first rod body and the second rod body, reduces manufacturing costs, and optimizes the assembly efficiency of the segmented plunger rod; since the holder can enter the slot radially, that is, the direction in which the holder is inserted into the slot is perpendicular to the movement direction of the rod, the first rod body can be assembled by radial plugging after being positioned on the side of the second rod body, which can shorten the installation space required in the axial direction before the first rod body and the second rod body are assembled, eliminates the step of axial alignment of the rod bodies, and reduces the difficulty of assembly.

[0008] Preferably, the clamping slot has a notch, and the clamping slot is connected to the end surface of the second rod body close to the clamping seat to form the notch.

[0009] Preferably, the slot also has a socket, the slot is connected to the outer wall surface of the second rod body and forms a socket, and the holder can pass through the slot and be located inside the socket. The socket and the slot allow the slot to penetrate the end surface and the side wall surface of the second rod body respectively, forming an open channel of the slot along the radial direction of the second rod body, so that the holder can pass through the channel in the radial direction. During assembly, the end of the first rod body with the holder is placed on the side of the end of the second rod body with the slot, and after the slot and the holder are aligned, the holder enters the open channel through the socket of the side opening. In this process, the holder synchronously passes through the end surface where the slot is located, so that the second rod body is closely connected with the first rod body at the end surface, and the distance between the assembly and the end surfaces of each rod body is shortened under the premise of achieving close matching of the rod bodies. The slot provides radial constraints for the holder through the slot and the socket, which is conducive to the rapid assembly of the first rod body and the second rod body and ensures coaxiality.

[0010] Preferably, the holder includes a first holder and a second holder, one end of the first holder is connected to the first rod, the other end of the first holder is connected to the second holder, a step is formed at the connection between the first holder and the second holder, the slot has an arc surface that matches the step, and the arc surface is used to support the holder. The setting of the step can strengthen the constraint of the slot on the block along the axis of the second rod, thereby solving the problem of the first rod offset relative to the axis of the second rod, avoiding the possibility of the first rod and the second rod damaging the pump body and the inside of the pump head due to the axis offset, reducing maintenance costs, while ensuring the sealing of the plunger rod to transport the medium, avoiding wear and tear to produce gaps that cause medium leakage or pressure changes that affect the delivery power;

[0011] The step is also conducive to forming contact surfaces in multiple directions between the holder and the slot, realizing the installation guide of the contact surface matching, and avoiding the problem of contact surface bumping and wear caused by non-parallel contact of the single-side wall during assembly, reducing the difficulty of assembling the first rod body and the second rod body, and at the same time avoiding the problem of debris generated by local wear of the holder or the slot entering the pump body or pump head, causing internal wear of the pump body or pump head, thereby reducing maintenance costs and the difficulty of cleaning and disinfecting the pump head.

[0012] Preferably, the arc surface includes a first arc surface and a second arc surface which are arranged concentrically, the radius of the first arc surface is smaller than the radius of the second arc surface, the first arc surface cooperates with the outer wall of the first seat body, and the second arc surface cooperates with the outer wall of the second seat body. The card seat is inserted into the card slot, wherein the outer wall surface of the first seat body cooperates with the first arc surface, and the outer wall surface of the second seat body cooperates with the second arc surface. Since the radius of the second arc surface is larger than the radius of the first arc surface, that is, the step extends outward from the end surface of the first seat body connecting the second seat body, after the card seat enters the card slot, the step forms a constrained end surface of the second seat body along the axis of the second rod body in the second arc surface, so as to ensure that the first seat body and the second seat body will not generate axial movement in the card slot, and prevent the card seat from axially sliding in the card slot and causing wear, which causes the first rod body to fall off relative to the second rod body; the above scheme realizes the first rod body and the second rod body. The two rod bodies can be assembled at a fixed interval in the axial direction to stabilize the overall axial length of the assembled plunger rod, ensuring that the end of the plunger rod that contacts the medium always has the same stroke starting position during the movement of the medium, which is conducive to the medium being transported at a fixed flow rate. At the same time, when multiple mediums are transported in a fixed ratio, the above scheme can ensure that the raw materials of each medium can be transported in a fixed ratio, which is conducive to improving the flow accuracy of the plunger pump when quantitatively transporting the medium, and improving the ratio accuracy when transporting multiple mediums in a fixed ratio, and at the same time can ensure the concentration of the mixed material formed after the raw materials are mixed.

[0013] Preferably, the extension length of the first arc surface in the axial direction is greater than the extension length of the first seat body in the axial direction, so that the end face of the first rod body provided with the first seat body does not contact the end face where the socket is located. After the first seat body is matched with the first arc surface, under the limiting effect of the step on the second clamping seat, the first rod body is matched with the first arc surface, and one end of the first clamping seat connected to the first rod body extends out of the notch, so that the end face of the first rod body provided with the first seat body does not contact the end face where the socket is located. On the one hand, the possibility of contact wear between the first rod body and the second rod body at the end face caused by vibration interference is reduced, thereby reducing maintenance costs, and preventing wear debris from contaminating the internal environment of the pump body and the pump head, reducing the difficulty of cleaning and disinfection after disassembling the pump head, and improving cleaning efficiency. On the other hand, the possibility of contact wear between the first rod body and the second rod body at the end face during assembly is reduced, that is, the first rod body and the second rod body are quickly and losslessly connected without the need for precise positioning of the clamping seat and the slot, thereby optimizing the assembly process, improving assembly efficiency, lowering the operating threshold, and also reducing the equipment and personnel costs caused by positioning.

[0014] Preferably, the slot has a guide surface that passes through the outer wall of the second rod, the guide surface is an end surface and can cooperate with the outer wall of the card seat, and the outer wall of the card seat can contact the guide surface and move relatively. The guide surface forms an insertion guide for the installation of the card seat in the slot, further improving assembly efficiency, reducing the risk of wear of the card seat and the slot due to position offset, and reducing maintenance costs.

[0015] Preferably, the plunger rod comprises a rod seat, a conveying rod and a driving rod, one end of the rod seat is connected to the clamping seat, the other end of the rod seat is plugged into the conveying rod, one end of the driving rod is connected to the driving component, and the other end of the driving rod is provided with a clamping groove.

[0016] Preferably, the pump head and the pump body are detachably connected, and a clamping piece is provided on the outside of the connection between the pump head and the pump body, and the clamping piece has a clamping plate that contacts the pump head and the outer surface of the pump body. The detachable connection between the pump head and the pump body can realize the rapid disassembly of the two and the replacement of their internal components, solving the problem of the difficulty in disassembling the plunger pump and the cost of replacing the plunger pump parts. The clamping piece 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 of the need to set threaded connection holes on the pump head and the pump body, 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 in processing the pump head and the pump body.

[0017] The above-mentioned scheme of detachable pump head and pump body cooperates with the scheme of segmented assembly of plunger rod, and the pump head and the first rod body for conveying medium can be replaced without replacing the plunger rod as a whole, thereby realizing partial disassembly and reducing the difficulty of replacement and disassembly. At the same time, the detachable pump head and the first plunger rod are cleaned and disinfected. Compared with cleaning the plunger rod connected to the pump body as a whole, the former can reduce the difficulty of cleaning and disinfection, and also reduce the scope of cleaning and disinfection, thereby reducing the cost of cleaning and disinfection work; without disassembling the plunger rod as a whole, the plunger rod can be disassembled and replaced by the first rod body in contact with the medium, which, on the one hand, avoids secondary contamination caused by assembly after cleaning and disinfection of the plunger rod, and on the other hand, without replacing the pump head and pump body, the overall length of the plunger rod can be quickly changed, and the range of motion of the delivery rod can be adjusted according to different needs, thereby realizing adjustment to different flow requirements, greatly improving adaptability and reducing procurement costs.

[0018] Since the present invention adopts a radially plug-in segmented plunger rod, it has the following beneficial effects: the segmented rod body is easy to realize modular manufacturing and reduces the difficulty of production; the holder is radially inserted into the slot, shortening the installation space required in the axial direction of the rod body, and the rod body does not need to be axially aligned, reducing the difficulty and requirements of assembly; the notch and the socket provide radial constraints for the holder, which is beneficial to ensure the coaxiality of the first rod body and the second rod body; the step strengthens the axial constraint of the slot on the block to avoid damage to the pump body and the inside of the pump head due to axial offset between the rod bodies; the step prevents the relative offset of the rod body, avoids wear and tear to produce gaps that lead to medium leakage and pressure changes that affect the delivery power; the step realizes contact surface installation guidance, avoids the problem of wear and tear of the holder and the slot causing internal wear of the pump body or pump head, and reduces maintenance costs and the difficulty of cleaning and disinfecting the pump head; arc surfaces of different radii stabilize the rod body spacing assembly, ensure the accuracy of the plunger rod stroke position, and thus improve the flow accuracy when conveying the medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a top view schematic diagram of a flange clamp split pump head with a slot-type segmented plunger rod;

[0020] Figure 2 Schematic diagram of the plunger rod structure;

[0021] Figure 3 It is a schematic diagram of the structure after the first rod body and the second rod body are separated;

[0022] Figure 4 It is a top view of the plunger rod;

[0023] Figure 5 for Figure 4 BB section view;

[0024] Figure 6 for Figure 1 AA plane cross-sectional view;

[0025] Figure 7 A schematic diagram of the clamping structure.

[0026] Reference numerals: pump head 1; pump body 2; plunger rod 3; first rod body 31; first seat body 311; second seat body 312; second rod body 32; first arc surface 321; second arc surface 322; rod seat 33; delivery rod 34; first protrusion 4; second protrusion 5; clamping piece 6; clamping plate 61; connecting rod 62; fastening ring 63. DETAILED DESCRIPTION

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

[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See attached Figure 1 - Attachment Figure 5 A flange clamp split pump head 1 with a slot-type segmented plunger rod 3 comprises: a pump head 1 and a pump body 2 that are assembled and connected, a plunger rod 3 is cooperatively arranged in the pump head 1 and the pump body 2, the plunger rod 3 has a first rod body 31 and a second rod body 32, one end of the first rod body 31 has a seat, and the end of the second rod body 32 close to the seat has a slot, and the seat can be inserted into the slot and matched along the radial direction of the first rod body 31.

[0031] The first rod body 31 and the second rod body 32 are connected at the end by inserting the card seat into the card slot in a radial direction and matching them. In this scheme, the plunger rod 3 is assembled by the split first rod body 31 and the second rod body 32, which can realize modular manufacturing of the plunger rod 3 and reduce the manufacturing difficulty of the plunger rod 3. The above scheme does not require additional connecting parts to realize the rapid assembly of the first rod body 31 and the second rod body 32, which reduces the manufacturing cost and optimizes the assembly efficiency of the segmented plunger rod 3. Since the card seat can enter the card slot in a radial direction, that is, the direction in which the card seat and the card slot are inserted is perpendicular to the movement direction of the rod, the possibility of axial separation of the first rod body 31 and the second rod body 32 at the connection caused by the axial reciprocating motion can be reduced, that is, the problem of axial spacing or axial separation between the first rod body 31 and the second rod body 32 during the movement of the plunger rod 3 is solved, and the possibility of change in the stroke end position of the plunger rod 3 in the conveying medium cavity is reduced, which is conducive to maintaining the stability of medium conveying by stabilizing the degree of cavity change.

[0032] The clamping slot has a notch, and the clamping slot is connected to the end surface of the second rod body 32 close to the clamping seat to form a notch.

[0033] The card slot also has a socket, which is connected to the outer wall surface of the second rod body 32 to form the socket, and the card seat can pass through the slot and be located inside the socket.

[0034] The socket and the notch allow the slot to penetrate the end face and the side wall of the second rod body 32 respectively, forming an open channel of the slot along the radial direction of the second rod body 32, so that the holder can pass through the channel radially. During assembly, the end of the first rod body 31 with the holder is placed on the side of the end of the second rod body 32 with the slot. After the slot and the holder are aligned, the holder enters the open channel through the socket at the side opening. During this process, the holder synchronously passes through the end face where the notch is located, realizing a close connection between the end face of the second rod body 32 and the end face of the first rod body 31, shortening the distance between the assembly and the end faces of each rod body under the premise of achieving close fit of the rod bodies. The slot provides radial constraints for the holder through the notch and the socket, which is conducive to the rapid assembly of the first rod body 31 and the second rod body 32 and ensures coaxiality.

[0035] The card holder includes a first seat body 311 and a second seat body 312. One end of the first seat body 311 is connected to the first rod body 31, and the other end of the first seat body 311 is connected to the second seat body 312. The first seat body 311 and the second seat body 312 form a step at the connection. The card slot has an arc surface that matches the step, and the arc surface is used to support the card holder.

[0036] The setting of the step can strengthen the constraint of the card slot on the card block along the axis direction of the second rod body 32, thereby solving the problem of the axis deviation of the first rod body 31 relative to the second rod body 32, avoiding the possibility of the first rod body 31 and the second rod body 32 damaging the pump body 2 and the inside of the pump head 1 due to the axis deviation, reducing the maintenance cost, while ensuring the sealing of the medium transported by the plunger rod 3, avoiding the gap caused by wear and tear to cause medium leakage or pressure change affecting the transport power;

[0037] The step is also conducive to forming contact surfaces in multiple directions between the seat and the slot, realizing the installation guide of the contact surface matching, and can avoid the problem of contact surface bumping and wear caused by non-parallel contact of the single-side wall during assembly, reducing the difficulty of assembling the first rod body 31 and the second rod body 32. At the same time, it can avoid the problem of debris generated by local wear of the seat or the slot entering the pump body 2 or the pump head 1, causing internal wear of the pump body 2 or the pump head 1, thereby reducing the maintenance cost and the difficulty of cleaning and disinfecting the pump head 1.

[0038] The arc surface includes a first arc surface 321 and a second arc surface 322 which are concentrically arranged. The radius of the first arc surface 321 is smaller than that of the second arc surface 322 . The first arc surface 321 cooperates with the outer wall of the first seat body 311 , and the second arc surface 322 cooperates with the outer wall of the second seat body 312 .

[0039] The card seat is inserted into the card slot, wherein the outer wall surface of the first seat body 311 is matched with the first arc surface 321, and the outer wall surface of the second seat body 312 is matched with the second arc surface 322. Since the radius of the second arc surface 322 is greater than the radius of the first arc surface 321, that is, the step extends outward from the end surface of the first seat body 311 connecting the second seat body 312, after the card seat enters the card slot, the step forms a constrained end surface of the second seat body 312 along the axis of the second rod body 32 in the second arc surface 322, so as to ensure that the first seat body 311 and the second seat body 312 will not move axially in the card slot, and prevent the card seat from axially sliding in the card slot and causing wear, resulting in the first rod body 31 relative to the second rod The body 32 falls off; the above scheme realizes that the first rod body 31 and the second rod body 32 can be assembled at a fixed interval in the axial direction to stabilize the overall axial length of the assembled plunger rod 3, and ensure that the end of the plunger rod 3 that contacts the medium always has the same stroke starting position during the movement of the medium, which is conducive to the medium being transported at a fixed flow rate. At the same time, when multiple mediums are transported in a fixed ratio, the above scheme can ensure that the raw materials of each medium can be transported in a fixed ratio, which is conducive to improving the flow accuracy of the plunger pump when quantitatively transporting the medium, and improving the ratio accuracy when transporting multiple mediums in a fixed ratio, and at the same time can ensure the concentration of the mixed material formed after the raw materials are mixed.

[0040] The axial extension length of the first arc surface 321 is greater than the axial extension length of the first seat body 311 , so that the end surface of the first rod body 31 where the first seat body 311 is disposed does not contact the end surface where the socket is located.

[0041] After the first seat body 311 is matched with the first arc surface 321, under the limiting effect of the step on the second seat, the first rod body 31 is matched with the first arc surface 321, and the end of the first seat connected to the first rod body 31 extends out of the slot, so that the end face of the first rod body 31 provided with the first seat body 311 does not contact the end face where the socket is located. On the one hand, the possibility of contact and wear between the first rod body 31 and the second rod body 32 at the end face caused by vibration interference is reduced, thereby reducing maintenance costs, and preventing wear debris from contaminating the internal environment of the pump body 2 and the pump head 1, reducing the difficulty of cleaning and disinfection after disassembling the pump head 1, and improving cleaning efficiency. On the other hand, the possibility of contact and wear between the first rod body 31 and the second rod body 32 at the end face during assembly is reduced, that is, without the need for precise positioning of the seat and the slot, the first rod body 31 and the second rod body 32 are quickly and losslessly connected, thereby optimizing the assembly process, improving assembly efficiency, lowering the operating threshold, and also reducing the equipment and personnel costs caused by positioning.

[0042] The slot has a guide surface that passes through the outer wall of the second rod body 32. The guide surface is an end surface and can cooperate with the outer wall of the card seat. The outer wall of the card seat can contact the guide surface and move relatively. The guide surface forms an insertion guide for the installation of the card seat in the slot, further improving the assembly efficiency, reducing the risk of wear of the card seat and the slot due to position offset, and reducing maintenance costs.

[0043] The plunger rod 3 comprises a rod seat 33, a conveying rod 34 and a driving rod. One end of the rod seat 33 is connected to the clamping seat, and the other end of the rod seat 33 is plugged into the conveying rod 34. One end of the driving rod is connected to the driving component, and the other end of the driving rod is provided with a clamping groove.

[0044] The pump head 1 is detachably connected to the pump body 2 . A clamping member 6 is provided on the outer side of the connection between the pump head 1 and the pump body 2 . The clamping member 6 has a clamping plate 61 that contacts the outer surfaces of the pump head 1 and the pump body 2 .

[0045] The detachable connection solution of the pump head 1 and the pump body 2 can realize the rapid disassembly of the two and the replacement of the internal components, solving the problem of the difficulty in disassembly of the plunger pump and the cost of replacing the parts of the plunger pump. The assembly parts are 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. At the same time, it solves the problem that the pump head 1 and the pump body 2 need to be provided with threaded connection holes, which leads to the reduction of 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.

[0046] The above-mentioned detachable scheme of the pump head 1 and the pump body 2 cooperates with the scheme of segmented assembly of the plunger rod 3, and the pump head 1 and the first rod body 31 for conveying the medium can be replaced without replacing the plunger rod 3 as a whole, thereby realizing partial disassembly and reducing the difficulty of replacement and disassembly. At the same time, the detachable pump head 1 and the first plunger rod 3 are cleaned and disinfected. Compared with cleaning the plunger rod 3 connected to the pump body 2 as a whole, the former can reduce the difficulty of cleaning and disinfection, and also reduce the scope of cleaning and disinfection, thereby reducing the cost of cleaning and disinfection work; without the need to disassemble the plunger rod 3 as a whole, the plunger rod 3 can be disassembled and replaced by the first rod body 31 in contact with the medium, which, on the one hand, avoids secondary contamination caused by assembly after the plunger rod 3 is cleaned and disinfected; on the other hand, without replacing the pump head 1 and the pump body 2, the overall length of the plunger rod 3 can be quickly changed, and the range of motion of the delivery rod 34 can be adjusted according to different needs, thereby realizing adjustment for different flow requirements, greatly improving adaptability and reducing procurement costs.

[0047] The pump head 1 and the pump body 2 have a channel inside, and the plunger rod 3 is cooperatively arranged in the channel.

[0048] Since the plunger rod 3 is divided into a first rod body 31 and a second rod body 32, the two rod bodies are connected by radial plugging in the slot through a card seat, and the slot can radially leave the card slot through the socket and the notch to realize the disassembly of the first rod body 31 and the second rod body 32. When replacing or assembling the pump head 1 on the pump body 2, the first rod body 31 and the second rod body 32 are first connected by radial plugging, and then the pump head 1 and the pump body 2 are connected by the clamping piece 6. During the connection process, the plunger rod 3 formed by the combination of the first rod body 31 and the second rod body 32 axially passes through the channel in the pump head 1. The pump head 1 can constrain the outer wall surface of the plunger rod 3 as a whole through the channel inside it, that is, the first rod body 31 and the second rod body 32 are connected through the channel. The correction of the coaxiality of the two rod bodies 32 is conducive to avoiding the possibility that the first rod body 31 and the second rod body 32 are not coaxial due to the improper assembly of the holder in the slot. The above scheme can realize the coaxiality correction of the first rod body 31 and the second rod body 32 through the assembly of the pump head 1 and the pump body 2. On the one hand, it solves the problem of the holder not being properly inserted or over-inserted in the slot during the assembly process, and avoids the risk of damage to the pump head 1 due to the misalignment of the rod bodies. On the other hand, it reduces the assembly accuracy requirement, that is, there is no need to perform coaxiality detection after the first rod body 31 and the second rod body 32 are connected. The coaxiality correction can be achieved through the assembly of the pump head 1, which simplifies the inspection work after assembly and improves the efficiency of the assembly process.

[0049] The above solution of correcting the coaxiality of the rod body through the channel can also prevent the holder from being overly inserted and deformed in the slot, which may make it difficult to separate the first rod body 31 and the second rod body 32.

[0050] Embodiment 2:

[0051] See attached Figure 6 On the basis of the first embodiment of the present invention, the pump head 11 includes a first protrusion 4 on the outside, the pump body 22 includes a second protrusion 5 on the outside that cooperates with the first protrusion 4, the clamping plate 61 has an inner contour with an adjustable opening degree, and the clamping plate 61 is surrounded and arranged on the periphery of the first protrusion 4 and the second protrusion 5;

[0052] The first protrusion 4 and the second protrusion 5 are both annular bodies, and have guide surfaces at the non-contact outer edges thereof, the guide surfaces are conical surfaces, and the outer edges of the guide surfaces are arranged toward each other, and the clamping plate 61 has an inner contour, and the inner contour can contact and cooperate with the two guide surfaces at the same time.

[0053] The clamping plate 61 can better realize the installation guidance outside the first protrusion 4 and the second protrusion 5 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 clamping plate 61 is in close contact with the first guide surface and the second guide surface through the inner contour, the first protrusion 4 and the second protrusion 5 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 protrusion 4 and the second protrusion 5 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.

[0054] The pump head 1 and the pump body 2 have a channel inside, and the plunger rod 3 is cooperatively arranged in the channel.

[0055] Since the plunger rod 3 is divided into a first rod body 31 and a second rod body 32, the two rod bodies are connected by radial plugging in the slot through a card seat, and the slot can radially leave the card slot through the socket and the notch to realize the disassembly of the first rod body 31 and the second rod body 32. When replacing or assembling the pump head 1 on the pump body 2, the first rod body 31 and the second rod body 32 are first connected by radial plugging, and then the pump head 1 and the pump body 2 are connected by the clamping piece 6. During the connection process, the plunger rod 3 formed by the combination of the first rod body 31 and the second rod body 32 axially passes through the channel in the pump head 1. The pump head 1 can constrain the outer wall surface of the plunger rod 3 as a whole through the channel inside it, that is, the first rod body 31 and the second rod body 32 are connected through the channel. The correction of the coaxiality of the two rod bodies 32 is conducive to avoiding the possibility that the first rod body 31 and the second rod body 32 are not coaxial due to the improper assembly of the holder in the slot. The above scheme can realize the coaxiality correction of the first rod body 31 and the second rod body 32 through the assembly of the pump head 1 and the pump body 2. On the one hand, it solves the problem of the holder not being properly inserted or over-inserted in the slot during the assembly process, and avoids the risk of damage to the pump head 1 due to the misalignment of the rod bodies. On the other hand, it reduces the assembly accuracy requirement, that is, there is no need to perform coaxiality detection after the first rod body 31 and the second rod body 32 are connected. The coaxiality correction can be achieved through the assembly of the pump head 1, which simplifies the inspection work after assembly and improves the efficiency of the assembly process.

[0056] The above solution of correcting the coaxiality of the rod body through the channel can also prevent the holder from being overly inserted and deformed in the slot, which may make it difficult to separate the first rod body 31 and the second rod body 32.

[0057] Embodiment three:

[0058] See attached Figure 7 On the basis of the first embodiment of the present invention, there are two clamps 61 and they surround the periphery of the connection between the pump head 1 and the pump body 2, and the connecting piece can make each clamp 61 close to each other and maintain the position.

[0059] The two clamping plates 61 are hinged at one end, and the two clamping plates 61 have protrusions at the non-hinged ends, and each protrusion has a U-shaped opening at the side wall;

[0060] The clamping member 6 further includes a connecting rod 62 and a fastening ring 63;

[0061] The connecting rod 62 has a connecting end and a free end. The connecting end is installed in one of the U-shaped openings, and the connecting rod 62 can pass through the other U-shaped opening. The fastening ring 63 is sleeved outside the connecting rod 62 and the two are threadedly connected. The fastening ring 63 squeezes the protrusion near the free end.

[0062] During assembly, the two clamps 61 are opened at the hinge; one of the clamps 61 is covered on one side outside the first guide part and the second guide part to form an initial positioning; the other clamp 61 is swung at the hinge to cover the other side outside the first guide part and the second guide part to form a secondary positioning; during the swinging process of the clamp 61, the connecting rod 62 passes through the U-shaped opening on the protrusion of the swinging clamp 61; the fastening ring 63 is inserted through the free end of the connecting rod 62, and the fastening ring 63 is rotated to approach and squeeze the protrusion near the free end on the connecting rod 62, so that the two protrusions are close to each other, thereby realizing the connection of the two clamps 61 outside the first guide part and the second guide part, thereby realizing the assembly of the pump body 2 and the pump head 1.

[0063] During disassembly, the fastening ring 63 is rotated in the opposite direction to lose the tension between the protrusions, and one of the clamping plates 61 is swung at the hinge to open the two clamping plates 61 from each other and disengage from the first guide portion and the second guide portion; at this time, the pump head 1 and the pump body 2 lose their assembly restrictions.

[0064] When the two clamps 61 swing relative to each other, the positions of the two protrusions can correspond through the cooperation of the connecting rod 62 in the U-shaped opening, which improves the convenience of clamping the clamps 61 together during assembly and is conducive to the rapid assembly of the pump head 1 and the pump body 2.

[0065] The fitting of the connecting rod 62 in the two protrusions can also enable the two clamping plates 61 to swing in a predetermined path. By observing whether the connecting rod 62 can fit in the U-shaped opening, it can be determined whether the two clamping plates 61 are offset at the hinge, thereby realizing a quick determination of whether there are problems with the assembly parts, optimizing the quality inspection of parts before assembling the plunger pump, and improving the efficiency of inspection before assembling the plunger pump.

[0066] 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 flange clamp split pump head with a slot-type segmented plunger rod, comprising: A pump head (1) and a pump body (2) are assembled and connected, wherein a plunger rod (3) is provided in cooperation with the pump head (1) and the pump body (2), wherein the plunger rod (3) comprises a first rod body (31) and a second rod body (32), wherein one end of the first rod body (31) comprises a holder, and the end of the second rod body (32) close to the holder comprises a slot, wherein the holder can be inserted into the slot in a radial direction of the first rod body (31) and cooperate with the holder, wherein the pump head (1) and the pump body (2) are detachably connected, and a clamping member (6) is provided on the outside of the connection between the pump head (1) and the pump body (2), wherein the clamping member (6) comprises a clamping plate contacting the outer surfaces of the pump head (1) and the pump body (2).

2. The flange clamp split pump head with slot-type segmented plunger rod according to claim 1 is characterized in that: The clamping slot has a notch, and the clamping slot is connected to the end surface of the second rod body (32) close to the clamping seat to form the notch.

3. The flange clamp split pump head with slot-type segmented plunger rod according to claim 2 is characterized in that: The card slot also has a socket, the card slot is connected to the outer wall surface of the second rod body (32) and forms the socket, and the card seat can pass through the slot and be located inside the socket.

4. The flange clamp split pump head with slot-type segmented plunger rod according to claim 3 is characterized by: The card holder comprises a first seat body (311) and a second seat body (312); one end of the first seat body (311) is connected to the first rod body (31); the other end of the first seat body (311) is connected to the second seat body (312); a step is formed at the connection between the first seat body (311) and the second seat body (312); the card slot has an arc surface that matches the step; the arc surface is used to support the card holder.

5. The flange clamp split pump head with slot-type segmented plunger rod according to claim 4 is characterized in that: The arc surface comprises a first arc surface (321) and a second arc surface (322) which are arranged concentrically, the radius of the first arc surface (321) being smaller than the radius of the second arc surface (322), the first arc surface (321) being matched with the outer wall of the first seat body (311), and the second arc surface (322) being matched with the outer wall of the second seat body (312).

6. The flange clamp split pump head with slot-type segmented plunger rod according to claim 5, characterized in that: The axial extension length of the first arc surface (321) is smaller than the axial extension length of the first seat body (311), so that the end surface of the first rod body (31) provided with the first seat body (311) does not contact the end surface where the socket is located.

7. The flange clamp split pump head with slot-type segmented plunger rod according to claim 1, characterized in that: The clamping slot has a guide surface that passes through the outer wall of the second rod body (32); the guide surface is an end surface and can cooperate with the outer wall of the clamping seat; the outer wall of the clamping seat can contact the guide surface and move relatively.

8. The flange clamp split pump head with slot-type segmented plunger rod according to claim 1, characterized in that: The first rod body (31) comprises a rod seat (33) and a conveying rod (34); one end of the rod seat (33) is connected to the clamping seat; the other end of the rod seat (33) is plugged into the conveying rod (34); the conveying rod (34) can contact and convey a medium; and one end of the second rod body (32) not provided with the clamping slot is connected to a driving component; the driving component is used to cause the second rod body (32) to reciprocate along an axis.

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