A plug-in pump head assembly for a magnetic segmented plunger rod

Abstract

The present invention discloses a plug-in pump head assembly of a magnetic segmented plunger rod, which is used for conveying a medium and belongs to the technical field of plunger pumps. The device comprises: a pump body and a plunger rod assembly passing through the pump body, a through hole cooperating with the plunger rod assembly is provided on the pump body, the through hole is arranged on the side of the pump body, the plunger rod assembly comprises a plunger rod and a plunger, and a first magnetic block and a second magnetic block are arranged between the plunger rod and the plunger. The device can disassemble the plunger rod together with the pump head, which effectively solves the problem of difficulty in maintaining the pump head due to the fixed connection between the plunger rod and the plunger.

Description

Technical Field

[0001] The invention belongs to the technical field of plunger pumps, and in particular relates to a plug-in pump head assembly of a magnetic segmented plunger rod. Background Art

[0002] The plunger pump head is one of the components of the plunger pump, which is mainly responsible for the suction and discharge of liquids and is widely used in the fields of petrochemicals, hydraulic systems, etc. The design of the traditional plunger pump head assembly focuses more on the realization of the basic pumping function. In the early days, the structure was relatively simple. However, with the development of industry, the performance requirements are increasing, and the structure is becoming more and more complex, which makes the requirements for materials, strength, sealing, etc. higher and higher. At the same time, the friction and wear between the plunger and the pump chamber will also affect the service life of the pump. In addition, most of the existing technologies are integrated connection between the plunger rod and the plunger, which makes the replacement and maintenance of the pump head more difficult.

[0003] Application No. WOJP17042737 discloses a plunger pump, in which a pump head portion is fixed to a pump body with a fixing member such as a bolt, but, at a stage before being fixed to the pump body with the fixing member, the pump head portion can move relative to the pump body in a direction perpendicular to the axial direction of the plunger. When the plunger drive unit moves to a predetermined position on the distal side of the pump body in this state and the pump head portion and the plunger drive unit are assembled together, the pump head portion is positioned so that the central axis of the plunger is substantially aligned with the central axis of the pump chamber. By fixing the pump head portion to the pump body with a fixing member at this position, the plunger pump can be assembled in a state in which the central axis of the plunger is substantially aligned with the central axis of the pump chamber. This patent still has room for improvement.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a magnetic segmented plunger rod plug-in pump head assembly for conveying medium. The device can disassemble the plunger rod together with the pump head, effectively solving the problem of difficulty in maintaining the pump head due to the fixed connection between the plunger rod and the plunger.

[0006] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0007] A plug-in pump head assembly with a magnetic segmented plunger rod includes a pump body and a plunger rod assembly passing through the pump body. A through hole cooperating with the plunger rod assembly is opened on the pump body, and the through hole is arranged on the side of the pump body. The plunger rod assembly includes a plunger rod and a plunger, and a first magnetic block and a second magnetic block are arranged between the plunger rod and the plunger.

[0008] According to one embodiment of the present invention, the plunger rod is embedded in the middle connecting rod, and the middle connecting rod is a column with cylindrical grooves at both ends. A first magnetic block is embedded in one end of the middle connecting rod, and the first magnetic block is connected to a second magnetic block, and the second magnetic block is embedded in the plunger rod, and a cylindrical groove is provided at one end of the plunger.

[0009] The plunger rod assembly is a segmented design, which is divided into a plunger, an intermediate connecting rod, a first magnetic block, a second magnetic block and a plunger rod, wherein the intermediate connecting rod is tightly connected to the plunger rod, and the connection method and connection process between the various sections of the plunger rod include but are not limited to heat fitting, bonding, and special welding. The first magnetic block is embedded in the end of the intermediate connecting rod, and the second magnetic block is embedded in the end of the plunger. The first magnetic block and the second magnetic block are magnets with magnetic properties, and the intermediate connecting rod and the plunger rod are fixedly installed by the magnetic attraction between the two magnetic blocks. Conventional plunger rods must be disassembled and assembled in a specific direction and path. When the disassembly angle is offset, due to the interaction force of the connection structure, it may cause the plunger rod to be unable to be disassembled or even damage the structure of the connecting part of the plunger rod and the plunger, and there are certain requirements for the disassembly accuracy. The magnetic connection method simplifies the connection structure between the plunger rod and the plunger, making it easier to remove the plunger rod with the pump head. When disassembling, the magnet can be removed with a demagnetizer, and then the pump head and the separated plunger rod can be removed together, and then cleaning and maintenance or replacement of plunger rods of different specifications can be performed to adapt to different pump heads. During installation, the magnetic block is first magnetized. During installation, the magnetized first magnetic block and the second magnetic block will attract each other and guide the positioning, thereby simplifying the installation process of the pump head and the plunger rod. Personnel can complete the disassembly and assembly work without professional training.

[0010] During the operation of the plunger pump, since most of the parts of the plunger pump are made of metal, they will rub against each other during the operation of the equipment, and the equipment will experience a certain degree of wear. Due to the characteristics of metal materials, when the equipment is worn, some small metal debris will inevitably be generated. These metal debris will mix with the oil in the equipment. When the equipment is running, they will scratch the plunger rod wall and the pump wall, etc., causing the equipment parts to wear faster, the oil functionality to decrease, and the service life of the parts to shorten, which invisibly increases the cost, makes maintenance more frequent, and affects work efficiency. The design of the magnetic block, on the one hand, makes the plunger rod structure simpler, simplifies the disassembly and assembly process, and reduces costs. On the other hand, the magnetic block can absorb the metal debris generated by the wear of the equipment, which has the effect of purifying the oil, while reducing equipment wear and extending the service life of the parts. Furthermore, since demagnetizing equipment such as demagnetizers do not need to come into contact with the magnetic block during demagnetization, when an unexpected situation occurs in the plunger pump, such as switch failure, equipment conduction, etc., and emergency stopping is required, personnel can also eliminate the magnetism of the magnetic block to disconnect the plunger rod from the plunger, thereby forcing the plunger pump to stop working and avoiding the occurrence of unexpected situations.

[0011] According to one embodiment of the present invention, a plunger rod assembly passes through the center of the through hole, a return spring is provided inside the pump body, the return spring is coaxially arranged with the through hole, and the plunger rod passes through the center of the return spring. A pump head is provided on one side of the pump body, one end of the plunger rod assembly is transmission-connected to the pump head, a working chamber is provided inside the pump head, one end of the plunger rod is located in the working chamber, and a seal is provided at the connection position between the pump head and the plunger rod.

[0012] The power input by the power mechanism pushes the plunger rod, and the plunger rod and the plunger are magnetically connected through the magnetic block on the middle connecting rod, so that the plunger reciprocates in the plunger pump, and the return spring is fixedly connected to the pump body. The return spring can limit the stroke and position of the plunger on the one hand, and absorb the vibration and impact of the plunger pump on the other hand. The reciprocating motion of the plunger changes the volume of the oil in the working chamber. The working chamber is provided with oil pipes toward the bottom and top of the pump head respectively. When the plunger moves in one direction, negative pressure is generated in the working chamber, and the liquid is sucked into the cylinder; when the plunger moves in the other direction, the liquid is compressed, and the liquid sucked into the cylinder is discharged, thereby realizing continuous oil supply. The seal is used to prevent oil leakage at the contact part between the pump head and the plunger rod.

[0013] According to one embodiment of the present invention, two bolt through holes are provided on the side wall of the pump body, and the two bolt through holes are arranged opposite to each other. The pump body is sleeved on the pump body, and the pump body is a square plate body. A through hole is provided in the center of the square plate body for passing the plunger rod. Cylindrical hole grooves are provided on the side walls at both ends of the square plate body, and the cylindrical hole grooves are coaxial with the bolt through holes, which are used for the installation limit of the fastening bolts. The pump body and the pump body are fixedly installed by fastening bolts, and the ends of the fastening bolts are deep in the cylindrical hole grooves. A pump head is provided on one side of the pump body, and the pump body is located between the pump body and the pump head. The pump body and the pump body are fixed together by fastening bolts, which is convenient for disassembly.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The magnetic plunger rod does not need to be disassembled in a specific direction and path like the traditional plunger rod. The magnetic plunger rod can automatically guide the positioning during installation to avoid installation misalignment. The magnetic block can also absorb metal debris generated by equipment wear and tear, which has the effect of purifying the oil. In addition, personnel can also use demagnetizers and other equipment to eliminate the magnetism of the magnetic block, disconnect the plunger rod, and force the plunger pump to stop working to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the overall scheme of the pump head of the present invention;

[0018] Figure 2 It is a schematic diagram of the cross-section of the pump head of the present invention;

[0019] Figure 3 It is a schematic diagram of the pump body scheme of the present invention;

[0020] Figure 4 It is a schematic diagram of the plunger rod scheme of the present invention;

[0021] Figure 5 It is a cross-sectional schematic diagram of the plunger rod of the present invention;

[0022] Figure 6 It is a cross-sectional schematic diagram of the matching scheme of the plunger rod and the pump head of the present invention.

[0023] Figure numbers: 10-pump body; 101-return spring; 102-bolt through hole; 20-pump body; 201-fastening bolt; 30-pump head; 301-seal; 302-working chamber; 40-plunger rod assembly; 401-first magnetic block; 402-second magnetic block; 403-middle connecting rod; 404-plunger rod; 405-plunger. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] Embodiment 1

[0027] See attached Figure 1-Figure 6 As shown, a plug-in pump head assembly of a magnetic segmented plunger rod includes a pump body 10 and a plunger rod assembly 40 passing through the pump body 10. A through hole that cooperates with the plunger rod assembly 40 is opened on the pump body 10, and the through hole is arranged on the side of the pump body 10. The plunger rod assembly 40 includes a plunger rod 404 and a plunger 405. A first magnetic block 401 and a second magnetic block 402 are arranged between the plunger rod 404 and the plunger 405. The plunger rod 404 is embedded in the middle connecting rod 403, and the middle connecting rod 403 is a column with cylindrical grooves at both ends. The first magnetic block 401 is embedded in one end of the middle connecting rod 403, and the first magnetic block 401 is connected to the second magnetic block 402. The second magnetic block 402 is embedded in the plunger 405, and a cylindrical groove is arranged at one end of the plunger 405.

[0028] The plunger rod assembly 40 is of segmented design, and is divided into a plunger 405, an intermediate connecting rod 403, a first magnetic block 401, a second magnetic block 402 and a plunger rod 404, wherein the intermediate connecting rod 403 is firmly connected to the plunger rod 404, and the connection method and connection process between the various sections of the plunger rod assembly 40 include but are not limited to heat fitting, bonding, and special welding. The first magnetic block 401 is embedded in the end of the intermediate connecting rod 403, and the second magnetic block 402 is embedded in the end of the plunger 405. The first magnetic block 401 and the second magnetic block 402 are magnets and have magnetic properties. The intermediate connecting rod 403 and the plunger 405 are fixedly installed by the magnetic attraction between the two magnetic blocks. In addition, the first magnetic block 401 and the second magnetic block 402 can also be other materials with magnetic adsorption, such as electromagnets, so that one of them is a magnet and the other is an electromagnet. The magnetism of the electromagnet can be controlled by controlling the power supply of the electromagnet, thereby controlling the connection and disconnection of the magnet and the electromagnet, and further controlling the connection state between the plunger rod 404 and the plunger 405. In detail: for example: the first magnetic block 401 can be a magnet, and the second magnetic block 402 can be an electromagnet. By connecting the wires at one end of the plunger 405, the conductive effect of the metal can be used to control the magnetism of the electromagnet located on the plunger 405 by turning on or off the current, thereby realizing the control of the connection state of the first magnetic block 401 and the second magnetic block 402, and realizing the connection and disconnection between the plunger 405 and the plunger rod 404. It should be noted that this example is only used to describe this embodiment. The first magnetic block 401 may also be an electromagnet, and the second magnetic block 402 may be a magnet. By connecting the wire at one end of the plunger rod 404, the current is transmitted to the first magnetic block 401 through the middle connecting rod 403, and the connection state between the plunger 405 and the plunger rod 404 can also be controlled to achieve the same effect. In addition, when the magnetic block is a conductive magnetic material, there is no requirement for the connection position.

[0029] When disassembling the conventional plunger rod 404, it needs to be disassembled and assembled in a specific direction and path. When the disassembly angle is offset, due to the interaction force of the connection structure, it may cause the plunger rod 404 to be unable to be disassembled or even damage the connection part structure between the plunger rod 404 and the plunger 405, and there are certain requirements for the disassembly accuracy. The magnetic connection method simplifies the connection structure between the plunger 405 and the plunger rod 404, so that the plunger rod 404 can be removed more easily with the pump head 30. When disassembling, the magnet block can be eliminated by using a demagnetizer, and then the pump head 30 and the separated plunger rod 404 can be removed together, and then cleaning and maintenance or replacement of plunger rods 404 of different specifications can be performed, so that different pump heads 30 can be adapted. During installation, the magnetic block is first magnetized. When installing, the magnetized first magnetic block 401 and the second magnetic block 402 will attract each other and guide the positioning, thereby simplifying the installation process of the pump head 30 and the plunger rod 404, and personnel can complete the disassembly work without professional training.

[0030] During the operation of the plunger pump, since most of the components of the plunger pump are made of metal, they will rub against each other during the operation of the equipment, and the equipment will experience a certain degree of wear. Due to the characteristics of the metal material, when the equipment is worn, some small metal debris will inevitably be generated. These metal debris will mix with the oil in the equipment. When the equipment is running, they will scratch the plunger rod wall and the pump wall, etc., causing the equipment parts to wear faster, the oil functionality to decrease, and the service life of the parts to shorten, which invisibly increases the cost, makes maintenance more frequent, and affects work efficiency. The design of the magnetic block, on the one hand, makes the structure of the plunger rod 404 simpler, simplifies the disassembly and assembly process, and reduces costs. On the other hand, the magnetic block can absorb the metal debris generated by the wear of the equipment, which has the effect of purifying the oil, while reducing equipment wear and extending the service life of the parts. Furthermore, since demagnetizing equipment such as a demagnetizer may not come into contact with the magnetic block during demagnetization, when an unexpected situation occurs in the plunger pump, such as switch failure, equipment conduction, etc., and emergency stopping is required, personnel can also eliminate the magnetism of the magnetic block to disconnect the plunger rod 404 from the plunger 405, thereby forcing the plunger pump to stop working and avoiding the occurrence of unexpected situations.

[0031] A plunger rod assembly 40 passes through the center of the through hole, a return spring 101 is provided inside the pump body 10, the return spring 101 is coaxially arranged with the through hole, and the plunger rod assembly 40 passes through the center of the return spring 101. A pump head 30 is provided on one side of the pump body 10, one end of the plunger rod assembly 40 is transmission-connected with the pump head 30, a working chamber 302 is provided inside the pump head 30, one end of the plunger rod 404 is located in the working chamber 302, and a seal 301 is provided at the connection position between the pump head 30 and the plunger rod 404.

[0032] The power input by the power mechanism pushes the plunger rod 404, and the plunger rod 404 and the plunger 405 are magnetically connected through the magnetic block on the intermediate connecting rod 403, so that the plunger 405 reciprocates in the plunger pump, and the return spring 101 is fixedly connected to the pump body 10. The return spring 101 can limit the stroke and position of the plunger 405 on the one hand, and absorb the vibration and impact of the plunger pump on the other hand. The reciprocating motion of the plunger 405 causes the oil volume in the working chamber 302 to change. The working chamber 302 is provided with oil pipes toward the bottom and top of the pump head 30 respectively. When the plunger 405 moves in one direction, negative pressure is generated in the working chamber 302, and the liquid is sucked into the cylinder; when the plunger 405 moves in another direction, the liquid is compressed, and the liquid sucked into the cylinder is discharged, thereby realizing continuous oil supply. The seal 301 is used to prevent oil leakage at the contact part between the pump head 30 and the plunger rod 404.

[0033] Two bolt through holes 102 are provided on the side wall of the pump body 10, and the two bolt through holes 102 are arranged opposite to each other. The pump body 10 is sleeved on the pump body 20, and the pump body 20 is a square plate body. A through hole is provided in the center of the square plate body for passing the plunger rod assembly 40. Cylindrical hole grooves are provided on the side walls at both ends of the square plate body, and the cylindrical hole grooves are coaxial with the bolt through holes 102, which are used to limit the installation of the fastening bolts 201. The pump body 10 and the pump body 20 are fixedly installed by fastening bolts 201, and the ends of the fastening bolts 201 are deeply inserted into the cylindrical hole grooves. A pump head 30 is provided on one side of the pump body 20, and the pump body 20 is located between the pump body 10 and the pump head 30. The pump body 10 and the pump body 20 are fixed together by fastening bolts 201, which are convenient for disassembly.

[0034] At the same time, it should be noted that in the present embodiment, the number of plunger rod assemblies consisting of the plunger rod, plunger rod seat and plunger installed in the plunger pump is 1-4 groups, but the present technical solution is not limited to 1-4 groups, for example, it can be 1 group, 2 groups, 3 groups, 4 groups, 5 groups, 6 groups, 7 groups, 8 groups, 9 groups, 10 groups, 11 groups... In actual production work, according to different production needs, different numbers of plunger rod assemblies can be selected to be installed and used in conjunction with the plunger pump.

[0035] 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.

[0036] 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 magnetic segmented plunger rod plug-in pump head assembly, comprising a pump body (10) and a plunger rod assembly (40) passing through the pump body (10), Features: The pump body (10) is provided with a through hole cooperating with the plunger rod assembly (40), the through hole being arranged on a side of the pump body (10), the plunger rod assembly (40) comprising a plunger rod (404) and a plunger (405), a first magnetic block (401) and a second magnetic block (402) being arranged between the plunger rod (404) and the plunger (405); The plunger rod assembly (40) passes through the center of the through hole, a return spring (101) is provided inside the pump body (10), the return spring (101) is coaxially arranged with the through hole, and the plunger rod assembly (40) passes through the center of the return spring (101); two bolt through holes (102) are provided on the side wall of the pump body (10), and the bolt through holes (102) are arranged opposite to each other; The pump body (10) is sleeved on the pump body (20), and a through hole is provided at the center of the pump body (20); cylindrical hole grooves are provided on the side walls at both ends of the pump body (20), and the cylindrical hole grooves are coaxial with the bolt through holes (102); the pump body (10) and the pump body (20) are fixedly installed by fastening bolts (201), and the ends of the fastening bolts (201) are deeply inserted into the cylindrical hole grooves.

2. The plug-in pump head assembly of a magnetic segmented plunger rod according to claim 1 is characterized in that: The plunger rod (404) is embedded in the middle connecting rod (403), and the middle connecting rod (403) is a column with cylindrical grooves at both ends; the middle connecting rod (403) is tightly connected to the plunger rod (404), and a first magnetic block (401) is embedded in one end of the middle connecting rod (403), and the first magnetic block (401) is connected to a second magnetic block (402), and the second magnetic block (402) is embedded in the plunger (405), and a cylindrical groove is provided at one end of the plunger (405).

3. The plug-in pump head assembly of a magnetic segmented plunger rod according to claim 2 is characterized in that: The first magnetic block (401) and the second magnetic block (402) are magnets with magnetic properties, and the intermediate connecting rod (403) and the plunger rod (404) are fixedly installed through the magnetic attraction between the first magnetic block (401) and the second magnetic block (402).

4. The plug-in pump head assembly of a magnetic segmented plunger rod according to claim 1 is characterized in that: A pump head (30) is provided on one side of the pump body (10); one end of the plunger rod (404) is drivingly connected to the pump head (30); a working chamber (302) is provided inside the pump head (30); one end of the plunger rod (404) is located in the working chamber (302); and a sealing member (301) is provided at a position in the pump head (30) that is connected to the plunger rod (404).

5. The plug-in pump head assembly of a magnetic segmented plunger rod according to claim 1, characterized in that: A pump head (30) is provided on one side of the pump body (20), and the pump body (20) is located between the pump body (10) and the pump head (30).

Images