A stud-type hydraulic end pump head with magnetic plunger rod

Abstract

The present invention discloses a stud-split hydraulic end pump head with a magnetic plunger rod, and relates to the technical field of plunger pumps. The device comprises: a pump head, a pump body is connected to one side of the pump head, and coaxial assembly holes are respectively provided inside the pump head and the pump body, and a plunger rod group is matched in the assembly hole. The pump body comprises a main pump body and an auxiliary pump body that can be detachably assembled, and a coaxial through hole is provided between the main pump body, the auxiliary pump body and the pump head, and a first fastener is built into the through hole; at least two through holes are provided; the plunger rod group comprises a first rod body and a second rod body that are coaxially connected at the end, and a magnetic structure is provided at the connection between the first rod body and the second rod body. The scheme of the present invention can realize the rapid disassembly and assembly of the plunger pump and ensure the disassembly and assembly accuracy, and can be calibrated during the assembly process to improve the assembly efficiency and assembly effect.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps, and in particular to a stud-split hydraulic end pump head of a magnetic plunger rod. Background Art

[0002] At present, the industry generally adopts an integrated pump unit, but this integrated structure makes it impossible to remove the plunger rod together with the pump head, which makes cleaning and maintenance difficult, and the plunger pump has a fixed flow rate and a single use method. 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. Therefore, for the above-mentioned problems, a detachable plunger pump can deal with the above-mentioned problems. Prior art US20070005021A1 An injection device, the device includes: a plunger rod, which can be moved out of an initial position in the dispensing direction and can therefore act on a plunger associated with an ampoule; a magnetic component, whereby the plunger rod can move relative to the magnetic component along its longitudinal axis; a magnetic matching component, which is arranged on the plunger rod, wherein the magnetic component and the magnetic matching component cooperate magnetically at at least one position of the plunger rod. The prior art uses a magnet to limit the reciprocating motion of the plunger rod, but there is still room for improvement in how to improve the rapid disassembly and replacement of the device and ensure the accuracy of disassembly and assembly. Summary of the invention

[0003] The object of the present invention is to provide a stud-split hydraulic end pump head with a magnetic plunger rod, which can achieve rapid disassembly and assembly while ensuring disassembly and assembly accuracy, can be calibrated during the assembly process, and improves assembly efficiency and assembly effect.

[0004] In order to solve the above technical problems, the present invention specifically provides the following technical solutions: a stud-split hydraulic end pump head with a magnetic plunger rod, comprising: a pump head, one side of the pump head is connected to a pump body, the pump head and the pump body are respectively provided with coaxial assembly holes, a plunger rod group is matched in the assembly hole, the pump body comprises a main pump body and an auxiliary pump body that can be detachably assembled, a coaxial through hole is provided between the main pump body, the auxiliary pump body and the pump head, a first fastener is built in the through hole; at least two through holes are provided;

[0005] The plunger rod assembly comprises a first rod body and a second rod body which are coaxially connected at the end, and a magnetic structure is arranged at the connection between the first rod body and the second rod body.

[0006] The present invention reduces the overall processing difficulty of the plunger pump by arranging the pump head and the pump body to be detachably connected, and can realize the rapid disassembly, assembly and replacement of the pump head and the pump body during the use of the plunger pump. The clamping force between the main pump body, the auxiliary pump body and the pump head is adjusted by the first fastener to ensure the assembly reliability of the three, and the first fastener is used to correct the assembly alignment accuracy of the main pump body, the auxiliary pump body and the pump head and the assembly gap between the three, so that the overall length of the assembly hole between the pump head and the pump body is controllable. For the plunger rod group arranged therein, the relative in-and-out distance of the assembly hole is controllable when the overall length of the assembly hole is controllable, and the probability of axial movement of the plunger rod group due to the uncontrollable in-and-out range is reduced. The plunger rod group is further arranged as a magnetic attraction scheme. On the one hand, there is no need to perform posture correction and concentricity correction on the first rod body and the second rod body before assembly, thereby improving the assembly efficiency of the segmented plunger rod group. On the other hand, the magnetic attraction connection method reduces the possibility of wear at the connection caused by vibration interference during the movement of the plunger rod group, and further reduces the probability of wear at the connection when the plunger rod group has axial movement.

[0007] The present invention further optimizes the disassembly and assembly scheme of the pump head and the pump body, and sets the plunger rod assembly as a detachable structure, providing more disassembly schemes.

[0008] According to one embodiment of the present invention, the auxiliary pump body is arranged between the main pump body and the pump head, one end of the first fastener is placed in the through hole of the main pump body and fixed to the main pump body, and the other end of the first fastener is placed outside the pump head and equipped with a nut. The nut is preferably a butterfly nut, so that it can be disassembled and assembled by hand, reducing the probability of using tools and reducing the workload of further disinfection of tools and contact parts caused by using tools.

[0009] According to one embodiment of the present invention, a first hole body connected to the assembly hole is opened on the side of the pump body, and the first hole body is arranged perpendicular to the axis of the assembly hole. A demagnetizer can be placed through the first hole body to demagnetize the magnetic attraction part of the plunger rod assembly, so that the plunger pump can be quickly disassembled and assembled.

[0010] According to one embodiment of the present invention, a clamping assembly is provided between the main pump body and the auxiliary pump body, and the clamping assembly includes a clamping groove provided on the main pump body and a clamping block provided on the auxiliary pump body, and the clamping block is assembled corresponding to the clamping groove. The clamping assembly is used to ensure that the through holes on the main pump body, the auxiliary pump body and the pump head correspond to each other, so as to achieve rapid and accurate assembly of the main pump body and the auxiliary pump body and reduce contact wear between the two.

[0011] According to one embodiment of the present invention, a seal is provided inside the pump head and is arranged with the plunger rod assembly, so as to prevent the medium from leaking during the relative movement of the plunger rod assembly.

[0012] According to one embodiment of the present invention, the magnetic attraction structure includes a first magnet and a second magnet, the first magnet is arranged at the end of the first rod, the second magnet is arranged on the surface of the second rod adjacent to the first rod, and the second magnet is arranged in coordination with the first magnet. The first magnet has a first end face, the second magnet has a second end face, and the first end face is parallel to the second end face and is arranged in coordination. The mutually parallel end faces allow the first magnet and the second magnet to have a relatively stable contact surface, which reduces the difficulty of manufacturing the magnetic block on the one hand, and on the other hand, even if the first rod and the second rod have not achieved initial positioning before assembly, the rods can be quickly connected by the coordination of the parallel end faces, which optimizes the posture calibration work before assembly of the first rod and the second rod, and improves the connection efficiency between the first rod and the second rod.

[0013] According to one embodiment of the present invention, the first rod body is provided with a first mounting hole for mounting the first magnet, and the second rod body is provided with a second mounting hole for mounting the second magnet. This is conducive to positioning the magnetic block at the center of each rod body end, so that the first magnet, the second magnet and the plunger rod assembly are subjected to a balanced lateral restraining force during movement, and can reduce the rotation of the components of the plunger rod assembly due to the eccentricity of the first magnet and the second magnet relative to the plunger rod assembly at the connection point, thereby reducing the wear of the plunger rod assembly on the pump body and the internal cavity of the pump head due to torsion.

[0014] According to one embodiment of the present invention, one end of the first magnet is disposed in the first mounting hole, and the other end is disposed outside the first mounting hole;

[0015] One end of the second magnet is arranged in the second mounting hole, and the other end is arranged outside the second mounting hole. The design of the magnet makes the structure of the plunger rod group simpler, simplifies the disassembly and assembly process, and reduces costs. On the other hand, a holding space can be formed between the first rod body and the second rod body at the connection between the first magnet and the second magnet, so that metal debris generated by equipment wear can be adsorbed, while reducing equipment wear and extending the service life of components. In addition, since demagnetization equipment such as demagnetizers can be demagnetized without contacting the magnetic block, when the plunger pump encounters an unexpected situation, such as switch failure, equipment conduction, etc., and needs to stop working urgently, personnel can also eliminate the magnetism of the magnetic block and disconnect the connection between the first rod body and the second rod body, thereby forcing the plunger pump to stop working and avoid accidents.

[0016] According to one embodiment of the present invention, a second magnet is connected to one end of the second rod body, and a coaxial third rod body is connected to the other end. The third rod body is detachably connected to the second rod body. A first chamber is built into the pump head, and the first chamber is connected to the assembly hole on the pump head. The third rod body can move axially in the assembly hole. The end of the third rod body can enter and exit the first chamber. It is used to realize the reciprocating motion of the plunger rod group to control the negative pressure inside the first chamber to realize medium delivery.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the present invention can realize fast disassembly and assembly and ensure the disassembly and assembly accuracy, can perform calibration during the assembly process, and improve the assembly efficiency and assembly effect. The present invention reduces the overall processing difficulty of the plunger pump by setting the pump head and the pump body to be detachably connected, and can realize fast disassembly and replacement of the pump head and the pump body during the use of the plunger pump. The first fastener is used to correct the assembly alignment accuracy of the main pump body, the auxiliary pump body and the pump head and the assembly gap between the three, so that the length of the assembly hole between the pump head and the pump body can be controlled. For the plunger rod group arranged inside, the assembly hole length can be controlled and the relative in-and-out distance of the assembly hole can be controlled. The probability of axial movement of the plunger rod group due to the uncontrollable in-and-out range is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 It is a schematic diagram of a stud-split hydraulic end pump head of a magnetic plunger rod of the present invention;

[0020] Figure 2 It is a side view of a stud-split hydraulic end pump head of a magnetic plunger rod of the present invention;

[0021] Figure 3 for Figure 2 Section view in the AA direction;

[0022] Figure 4 for Figure 2 Cross-sectional view in the middle BB direction;

[0023] Figure 5 It is a schematic diagram of the plunger rod assembly scheme of the present invention;

[0024] Figure 6 for Figure 5 Cross-sectional view in CC direction;

[0025] Figure 7 for Figure 6 A partial enlarged view of the K in the middle;

[0026] Figure 8 It is a schematic diagram of the disassembly of the plunger rod assembly of the present invention.

[0027] Description of reference numerals:

[0028] 10. Pump head; 11. Nut; 12. First chamber; 13. First fastener; 20. Pump body; 21. Main pump body; 22. Auxiliary pump body; 23 First hole body; 24. Snap-fit ​​assembly; 30. Plunger rod assembly; 31. First rod body; 32. Second rod body; 33. Third rod body; 34. First magnet; 35. Second magnet; 40. Seal. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The following first describes the concepts involved in the present application in conjunction with the accompanying drawings. It should be noted that the following description of each concept is only to make the content of the present application easier to understand, and does not limit the scope of protection of the present application; at the same time, the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict. The present application will be described in detail with reference to the accompanying drawings and in conjunction with the embodiments. Example

[0031] like Figure 1-Figure 8 As shown, a stud-split hydraulic end pump head with a magnetic plunger rod comprises: a pump head 10, a pump body 20 is connected to one side of the pump head 10, coaxial assembly holes are respectively provided inside the pump head 10 and the pump body 20, a plunger rod group 30 is matched in the assembly hole, the pump body 20 comprises a main pump body 21 and an auxiliary pump body 22 which can be detachably assembled, a coaxial through hole is provided between the main pump body 21, the auxiliary pump body 22 and the pump head 10, a first fastener 13 is built in the through hole; at least two through holes are provided;

[0032] The plunger rod assembly 30 comprises a first rod body 31 and a second rod body 32 which are coaxially connected at the ends, and a magnetic structure is provided at the connection between the first rod body 31 and the second rod body 32 .

[0033] The present invention reduces the overall processing difficulty of the plunger pump by arranging the pump head 10 and the pump body 20 to be detachably connected, and can realize the rapid disassembly, assembly and replacement of the pump head 10 and the pump body 20 during use of the plunger pump. The clamping force between the main pump body 21, the auxiliary pump body 22 and the pump head 10 is adjusted by the first fastener 13 to ensure the assembly reliability of the three and to correct the assembly alignment accuracy of the main pump body 21, the auxiliary pump body 22 and the pump head 10 and the assembly gap between the three by using the first fastener 13, so that the overall length of the assembly hole between the pump head 10 and the pump body 20 is controllable. For the plunger rod group 30 arranged therein, the relative entry and exit distance of the assembly hole is controllable when the overall length of the assembly hole is controllable, and the probability of axial movement of the plunger rod group 30 due to the uncontrollable entry and exit range is reduced. The plunger rod group 30 is further set to a magnetic attraction scheme. On the one hand, there is no need to perform posture correction and concentricity correction on the first rod body 31 and the second rod body 32 before assembly, thereby improving the assembly efficiency of the segmented plunger rod group 30. On the other hand, the magnetic connection method reduces the possibility of wear and tear caused by vibration interference during the movement of the plunger rod group 30, and further reduces the probability of wear and tear at the connection when the plunger rod group 30 has axial movement.

[0034] The present invention further optimizes the disassembly and assembly scheme of the pump head 10 and the pump body 20, and sets the plunger rod assembly 30 to a detachable structure, providing more disassembly schemes.

[0035] like Figure 4 As shown, the auxiliary pump body 22 is arranged between the main pump body 21 and the pump head 10, one end of the first fastener 13 is placed in the through hole of the main pump body 21 and fixed to the main pump body 21, and the other end of the first fastener 13 is placed outside the pump head 10 and is equipped with a nut 11. The nut 11 is preferably a butterfly nut, so that it can be disassembled and assembled by hand, reducing the probability of using tools and reducing the workload of further disinfection of tools and contact parts caused by using tools.

[0036] like Figure 3 As shown, a first hole body 23 connected to the assembly hole is opened on the side of the pump body 20, and the first hole body 23 is arranged perpendicular to the axis of the assembly hole. A demagnetizer can be placed through the first hole body 23 to demagnetize the magnetic attraction part of the plunger rod assembly 30, so that the plunger pump can be quickly disassembled and assembled.

[0037] A clamping assembly 24 is provided between the main pump body 21 and the auxiliary pump body 22. The clamping assembly 24 includes a clamping groove provided on the main pump body 21 and a clamping block provided on the auxiliary pump body 22. The clamping block is assembled correspondingly to the clamping groove. The clamping assembly 24 is used to ensure that the through holes on the main pump body 21, the auxiliary pump body 22 and the pump head 10 correspond to each other, so as to realize the rapid and accurate assembly of the main pump body 21 and the auxiliary pump body 22 and reduce the contact wear between the two.

[0038] The pump head 10 has a seal 40 disposed inside thereof and arranged with the plunger rod assembly 30 , so as to prevent the medium from leaking during the relative movement of the plunger rod assembly 30 . Example

[0039] Based on the solution of Example 1, this embodiment further optimizes the solution as follows: Figure 5-Figure 8 As shown, the magnetic attraction structure includes a first magnet 34 and a second magnet 35. The first magnet 34 is arranged at the end of the first rod 31. The second magnet 35 is arranged on the surface of the second rod 32 adjacent to the first rod 31. The second magnet 35 is arranged in cooperation with the first magnet 34. The first magnet 34 has a first end face, and the second magnet 35 has a second end face. The first end face is parallel to the second end face and is arranged in cooperation. The mutually parallel end faces make the first magnet 34 and the second magnet 35 have a relatively stable contact surface. On the one hand, it reduces the manufacturing difficulty of the magnetic block. On the other hand, even if the first rod 31 and the second rod 32 are not initially positioned before assembly, the rods can be quickly connected through the cooperation of the parallel end faces, which optimizes the posture calibration work before the assembly of the first rod 31 and the second rod 32, and improves the connection efficiency of the first rod 31 and the second rod 32.

[0040] The first rod body 31 is provided with a first mounting hole for mounting the first magnet 34, and the second rod body 32 is provided with a second mounting hole for mounting the second magnet 35. This is conducive to positioning the magnetic blocks at the center of the ends of the respective rod bodies, so that the first magnet 34, the second magnet 35 and the plunger rod assembly 30 are subjected to a balanced lateral restraining force during movement, and the rotation of the components of the plunger rod assembly 30 caused by the eccentricity of the first magnet 34 and the second magnet 35 relative to the plunger rod assembly 30 at the connection point can be reduced, thereby reducing the wear of the plunger rod assembly 30 on the pump body 20 and the internal cavity of the pump head 10 due to torsion.

[0041] One end of the first magnet 34 is disposed in the first mounting hole, and the other end is disposed outside the first mounting hole;

[0042] One end of the second magnet 35 is arranged in the second mounting hole, and the other end is arranged outside the second mounting hole. The design of the magnet makes the structure of the plunger rod group 30 simpler, simplifies the disassembly and assembly process, and reduces the cost. On the other hand, a storage space can be formed between the first rod body 31 and the second rod body 32 at the connection between the first magnet 34 and the second magnet 35, so that metal debris generated after equipment wear can be adsorbed, while reducing equipment wear and extending the service life of components. In addition, since demagnetization equipment such as demagnetizers can be demagnetized without contacting the magnetic block, when the plunger pump encounters an unexpected situation, such as switch failure, equipment conduction, etc., and needs to stop working urgently, personnel can also eliminate the magnetism of the magnetic block and disconnect the connection between the first rod body 31 and the second rod body 32, thereby forcing the plunger pump to stop working and avoid the occurrence of unexpected situations.

[0043] One end of the second rod 32 is connected to the second magnet 35, and the other end is connected to the coaxial third rod 33. The third rod 33 is detachably connected to the second rod 32. The pump head 10 has a built-in first chamber 12. The first chamber 12 is connected to the assembly hole on the pump head 10, and the third rod 33 can move axially in the assembly hole. The end of the third rod 33 can enter and exit the first chamber 12. It is used to realize the reciprocating motion of the plunger rod group 30 to control the negative pressure inside the first chamber 12 to realize medium transportation.

[0044] In this embodiment, the number of plunger rod groups 30 is at least one, and the specific number is selected according to actual production and use requirements. For example, two plunger rod groups 30 can be a group, and 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups... are selected according to production requirements.

[0045] In this embodiment, the first magnet 34 and the second magnet 35 include but are not limited to permanent magnets, materials with magnetic adsorption, or electromagnets.

[0046] In this embodiment, an electromagnet is preferred, which can increase or decrease the magnetic force or demagnetize the first magnet 34 and the second magnet 35 by controlling the magnet 34 and the second magnet 35 .

[0047] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

[0048] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this application, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the invention to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A stud-type hydraulic end pump head with a magnetic plunger rod, comprising: A pump head (10), wherein one side of the pump head (10) is connected to a pump body (20), wherein the pump head (10) and the pump body (20) are respectively provided with coaxial assembly holes, wherein a plunger rod assembly (30) is provided in cooperation with the assembly holes, and wherein the pump body (20) comprises a main pump body (21) and an auxiliary pump body (22) which are detachably assembled, wherein a coaxial through hole is provided between the main pump body (21), the auxiliary pump body (22) and the pump head (10), wherein a first fastener (13) is provided in the through hole; The plunger rod assembly (30) comprises a first rod body (31) and a second rod body (32) which are coaxially connected at the ends, and a magnetic structure is provided at the connection between the first rod body (31) and the second rod body (32); The magnetic attraction structure comprises a first magnet (34) and a second magnet (35), wherein the first magnet (34) is arranged at the end of the first rod (31), and the second magnet (35) is arranged on the surface of the second rod (32) adjacent to the first rod (31); A first hole (23) communicating with the assembly hole is formed on the side of the pump body (20); the first hole (23) is arranged perpendicular to the axis of the assembly hole; a demagnetizer can be placed through the first hole (23) to perform demagnetization on the plunger rod assembly (30).

2. A stud-type hydraulic end pump head with a magnetic plunger rod according to claim 1, characterized in that: The auxiliary pump body (22) is arranged between the main pump body (21) and the pump head (10); one end of the first fastener (13) is placed in the through hole of the main pump body (21) and is fixed to the main pump body (21); the other end of the first fastener (13) is placed outside the pump head (10) and is provided with a nut (11).

3. The stud-type hydraulic end pump head with magnetic plunger rod according to claim 1, characterized in that: A clamping assembly (24) is provided between the main pump body (21) and the auxiliary pump body (22), the clamping assembly (24) comprising a clamping groove formed on the main pump body (21) and a clamping block provided on the auxiliary pump body (22), the clamping block being assembled corresponding to the clamping groove.

4. The stud-type hydraulic end pump head with magnetic plunger rod according to claim 1, characterized in that: The pump head (10) has a sealing member (40) disposed inside thereof and configured with the plunger rod assembly (30).

5. The stud-type hydraulic end pump head with magnetic plunger rod according to claim 1, characterized in that: The second magnet (35) is arranged in cooperation with the first magnet (34).

6. A stud-type hydraulic end pump head with a magnetic plunger rod according to claim 5, characterized in that: The first rod body (31) is provided with a first mounting hole for mounting a first magnet (34), and the second rod body (32) is provided with a second mounting hole for mounting a second magnet (35).

7. A stud-type hydraulic end pump head with a magnetic plunger rod according to claim 6, characterized in that: One end of the first magnet (34) is arranged in the first mounting hole, and the other end is arranged outside the first mounting hole; One end of the second magnet (35) is arranged in the second mounting hole, and the other end is arranged outside the second mounting hole.

8. The stud-type hydraulic end pump head with magnetic plunger rod according to claim 1, characterized in that: One end of the second rod body (32) is connected to a second magnet (35), and the other end is connected to a coaxial third rod body (33); the third rod body (33) and the second rod body (32) are detachably connected.

9. A stud-type hydraulic end pump head with a magnetic plunger rod according to claim 8, characterized in that: The pump head (10) has a first chamber (12) built therein, the first chamber (12) being in communication with an assembly hole on the pump head (10), and the third rod body (33) being capable of axial movement in the assembly hole; The end of the third rod body (33) can enter and exit the first chamber (12), and is used to realize the reciprocating motion of the plunger rod assembly (30) to control the negative pressure inside the first chamber (12).

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