Quick-release pump head of butt joint type split plunger rod

Abstract

The invention belongs to the technical field of plunger pumps, and provides a quick-release pump head of a butt joint type split plunger rod. The device comprises a pump head and a pump body, a plunger part comprises a plunger working section and a plunger power section, the plunger working section is located on the side, close to the pump head, of the plunger part, and the plunger power section is located on the side, away from the pump head, of the plunger part; a plunger connecting section is arranged between the plunger working section and the plunger power section, the plunger power section and the plunger connecting section are axially connected in an inserted mode, and a radial connecting hole is formed in the inserted connection position of the plunger power section and the plunger connecting section. The plunger connecting section serves as a transition area of a disinfection environment and a general environment, so that a fluid part in contact with and conveyed by the plunger rod is separated from a power part in contact with the plunger pump, the plunger working section and the plunger connecting section are conveniently disinfected, and it is guaranteed that the interior of a pump head of the plunger pump has high-standard production conditions; and a high-standard production environment in the pump head is maintained.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps and provides a quick-release pump head with a docking-type split plunger rod. Background Art

[0002] In the high-standard manufacturing industry, the transportation and application of some liquids or solid-liquid mixtures are often involved. Therefore, it is necessary to use a plunger pump to transport these fluids in accordance with the current hygiene standards to achieve an important link in product production. After the equipment is shut down or the production is adjusted, it is necessary to disinfect and clean the plunger rod and pump head that are in direct contact with the fluid, or replace different pump heads and matching plunger rods to achieve different flow rates. Therefore, a replaceable plunger rod and a detachable pump head are needed to achieve the above functions. The prior art CN221838517U provides a plunger pump, including a plunger sleeve and a slot valve plunger rod. The central interior of the plunger sleeve is a vertical sealed inner cavity. The slot valve plunger rod is tightly fitted in the sealed inner cavity of the plunger sleeve. The outer wall of the plunger sleeve is provided with a horizontal liquid inlet and outlet. The bottom end of the plunger sleeve is provided with a pump sleeve connector, and the plunger sleeve and the pump sleeve connector are non-movably connected. The inner wall of the plunger sleeve in the prior art is easily worn during the reciprocating motion and repeated disassembly and assembly of the plunger rod, and after being worn, the plunger rod cannot be tightly connected and accurately positioned, and the stability is poor and the use cost is high. The inventor believes that there is a large room for improvement in the prior art. Summary of the invention

[0003] The object of the present invention is to provide a quick-release pump head with a docking split plunger rod so that the pump head and the matching plunger rod become replaceable parts, and to maintain the plunger rod to have a long service life after becoming a replaceable part. Secondly, ensure that the plunger rod is accurately positioned during the reciprocating motion, maintain the flow stability of the plunger pump, and keep the plunger pump at a high volumetric efficiency; improve the assembly efficiency of the split plunger rod, which is conducive to saving the working time of repeatedly disassembling and assembling the plunger rod and reducing the work intensity of disinfection and washing. To this end, the present invention provides a quick-release pump head with a docking split plunger rod, including a pump head and a plunger part, the plunger part includes a plunger working section and a plunger power section, the plunger working section is located on the side of the plunger part close to the pump head, and the plunger power section is located on the side of the plunger part away from the pump head; a plunger connecting section is provided between the plunger working section and the plunger power section, the plunger power section and the plunger connecting section are axially plugged, and a radial connecting hole is provided at the plug-in position of the plunger power section and the plunger connecting section. A plunger connecting section is provided between the plunger working section and the plunger power section, so that the part of the plunger rod that contacts the conveyed fluid and the part that contacts the power section of the plunger pump are separated, which is convenient for disinfecting the plunger working section and the plunger connecting section. The plunger connecting section serves as a transition area between the disinfection environment and the general environment, ensuring that the inside of the pump head of the plunger pump has high-standard production conditions, and a sealing structure is provided at the plunger connecting section to ensure that the sealing conditions between the pump head and the pump body of the plunger pump are good, maintaining the high-standard production environment inside the pump head; the plunger power section and the plunger connecting section are connected by plug-in connection and fixed by a first fastener provided through a radial connecting hole. The plug-in connection is conducive to simplifying the operation of disassembling and assembling the plunger connecting section and facilitating the replacement of the plunger working section. The fastener axially limits the plunger connecting section to avoid wear of the plunger connecting section during reciprocating motion, which changes the movement route of the plunger part, limits the relative displacement of the plunger connecting section and the plunger moving section, and avoids changes in the volumetric efficiency of the plunger part.

[0004] Preferably, a first connection hole is provided at the insertion position of the plunger power section, and an axial connection rod is provided on the plunger connection section to cooperate with the first connection hole. Since the plunger power section is fixedly connected to the power device, and a spring is provided on the side of the plunger power section away from the plunger connection section, the plunger pump realizes the reciprocating motion of the plunger part through the power device and the spring; the plunger power section is provided with a first connection hole to facilitate the insertion of the axial connection rod and the positioning of the radial connection hole.

[0005] Preferably, the radial connection hole passes through the plunger power section and the plunger connection section in the radial direction. The radial connection hole that radially passes through the axial connection seat and the plunger power section is used, and the radial connection hole is used to install fasteners to fix the plunger power section and the plunger connection section, which is conducive to the accurate positioning of the plunger connection section in the axial direction, avoiding changes in the linear stroke of the plunger connection section, avoiding changes in the volumetric efficiency of the plunger pump, and maintaining the flow rate of the plunger pump stable; the plunger power section performs reciprocating linear motion, and the fasteners in the radial connection hole are repeatedly subjected to shear force in the tangential direction. The radial connection hole passes through the plunger power section and the plunger connection section, which can increase the force points of the first fastener and avoid deformation or breakage of the first fastener in the radial connection hole. Furthermore, the first fastener can be a shoulder screw, and the middle section of the shoulder screw has a shaft body, which can better bear the shear force of the reciprocating linear motion of the plunger power section, avoid deformation or damage of the first fastener thread, resulting in the inability to remove the fastener, and the plunger part loses the replacement function or even becomes scrapped.

[0006] Preferably, the radial connection hole extends from the outer wall surface of the first connection hole to the inside of the axial connection rod in the radial direction. The radial connection hole provided as above is adopted to prevent the fastener from passing through from one side of the outer wall surface of the first connection hole to the other side due to processing tolerance or assembly, resulting in friction between the end of the first fastener and the inner wall of the chamber where the plunger part is located, resulting in scratches, affecting the volumetric efficiency of the plunger pump and the sealing inside the pump head; since the length and diameter of the radial connection hole are not directly affected by the plunger power section, it is conducive to selecting a fastener with a more suitable length-to-diameter ratio, which can effectively prevent the first fastener from being deformed by shear force during the reciprocating linear motion of the plunger power section, resulting in deformation or damage of the first fastener thread, the first fastener cannot be removed, and the plunger part loses the replacement function or even becomes scrapped.

[0007] Preferably, a guide protrusion is provided on the outer side of the axial connecting rod, and a semi-through groove is provided on the inner wall of the first connecting hole to cooperate with the guide protrusion. In order to ensure the sealing of the plunger part itself, the joints of the various parts of the plunger part need to have a smaller tolerance to ensure a tight fit. The use of the guide protrusion is conducive to the insertion of the axial connecting rod of the plunger connecting section into the plunger power section, and the guide protrusion can assist in the splicing of the radial connecting holes located in the plunger power section and the plunger connecting section, which is conducive to the insertion of the fastener into the radial connecting hole.

[0008] Preferably, a second connecting hole is provided on a side of the plunger connecting section away from the axial connecting rod, and the second connecting hole is connected to the plunger working section.

[0009] Preferably, the inner wall surface of the first connecting hole is a polygon, and the shape of the axial connecting rod matches the first connecting hole. The inner wall surface of the first connecting hole is a polygon, and the polygon has multiple edges. The edges have a guiding function, which is conducive to the insertion of the axial connecting rod into the first connecting hole; the polygon can limit the rotation of the axial connecting rod, which is convenient for the splicing of the channel of the plunger power section part and the plunger connecting section part of the radial connecting hole, and is conducive to the insertion of the first fastener into the radial connecting hole.

[0010] Preferably, the quick-release pump head of the docking split plunger rod also includes a pump body, and the outer surface of the joint between the pump head and the pump body is provided with a clamp body surrounding the joint, the clamp body has an opening, and the two sides of the opening are respectively provided with matching parts on the clamp body, and the matching parts are connected by fasteners, and one end of the second fastener is connected to a limiter. The second fastener can control the spacing between the two matching parts, and then control the change of the clamping tightness of the clamp body relative to the pump head and the pump body, to ensure the clamping of the pump head and the pump body, and more importantly, by controlling the positional relationship between the two matching parts of the clamp body, the clamp body is kept with a high roundness, thereby ensuring a high coaxiality between the pump head and the pump body, as well as the coaxiality of the plunger part inside the pump head and the pump body and the chamber where the plunger part is located, and the coaxiality of the pump head, the pump body, the plunger part and the chamber where the plunger part is located can also be corrected by adjusting the spacing between the two matching parts.

[0011] Preferably, the stopper has a connecting pin that is rotatably connected to the second fastener, and the distance between the mating parts changes during the rotation of the stopper. Through the above arrangement, the rotation of the stopper affects the tightness of the connection between the pump head and the pump body by the clamp. In certain usage scenarios, the tightness of the connection between the pump head and the pump body can be observed and judged by observing the rotation angle of the stopper and the difficulty of rotating the stopper, thereby solving the problem that it is difficult to observe the connection between the pump head and the pump body when the pump body connector is installed.

[0012] The present invention provides a quick-release pump head with a docking-type split plunger rod, so that the pump head and the matching plunger rod become replaceable parts, and the plunger rod still has a long service life after becoming a replaceable part; it ensures that the plunger rod is accurately positioned during the reciprocating motion, maintains the flow rate of the plunger pump stable, and maintains the plunger pump at a high volumetric efficiency; improves the assembly efficiency of the split plunger rod, which is conducive to saving the working time of repeatedly disassembling and assembling the plunger rod, and reduces the working intensity of disinfection and washing, and has the following beneficial effects: the plunger connecting section serves as a transition area between the disinfection environment and the general environment, so that the part of the plunger rod that contacts the transported fluid and the part that contacts the plunger rod The power part of the plunger pump is separated to facilitate the disinfection of the plunger working section and the plunger connecting section, ensuring that the inside of the pump head of the plunger pump has high-standard production conditions; and a sealing structure is set at the plunger connecting section to ensure good sealing conditions between the pump head and the pump body of the plunger pump, maintaining a high-standard production environment inside the pump head; the plug-in connection is conducive to simplifying the operation of disassembling and assembling the plunger connecting section, and facilitating the replacement of the plunger working section; avoiding wear of the plunger connecting section and the chamber where the plunger part is located during the reciprocating motion, causing the movement route of the plunger part to change, limiting the relative displacement of the plunger connecting section and the plunger moving section, and avoiding changes in the volumetric efficiency of the plunger part. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] 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 described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a disassembled diagram of the parts of the present invention; Figure 3 This is a disassembled diagram of the components of the first embodiment of the present invention; Figure 4 It is a cross-sectional structural schematic diagram of the first embodiment of the present invention; Figure 5 This is a disassembled diagram of the components of the second embodiment of the present invention; Figure 6 It is a cross-sectional structural schematic diagram of the second embodiment of the present invention; Figure 7 It is a schematic structural diagram of the pipe clamp of the present invention.

[0015] Explanation of the reference numerals: 1 pump head; 2 pipe clamp; 201 clamp body; 202 second fastener; 203 limiter; 204 adjustment part; 3 pump body; 301 first connecting hole; 4 plunger connecting section; 401 second connecting hole; 402 guide protrusion; 5 plunger working section; 6 first fastener; 7 radial connecting hole; 8 plunger power section. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Embodiment 1 Combination Figure 1 and Figure 2 As shown, a quick-release pump head 1 with a docking-type split plunger rod comprises a pump head 1 and a pump body 3, wherein the pump head 1 and the pump body 3 have a plunger part, the plunger part comprises a plunger working section 5 and a plunger power section 8, the plunger working section 5 is located on the side of the plunger part close to the pump head 1, and the plunger power section 8 is located on the side of the plunger part away from the pump head 1; a plunger connecting section 4 is provided between the plunger working section 5 and the plunger power section 8, the plunger power section 8 and the plunger connecting section 4 are axially plugged, and a radial connecting hole 7 is provided at the plugging position of the plunger power section 8 and the plunger connecting section 4. A plunger connecting section 4 is provided between the plunger working section 5 and the plunger power section 8, so that the part of the plunger rod that contacts the conveyed fluid and the part that contacts the power section of the plunger pump are separated, which facilitates the disinfection of the plunger working section 5 and the plunger connecting section 4. The plunger connecting section 4 serves as a transition area between the disinfection environment and the general environment, ensuring that the inside of the pump head 1 of the plunger pump has high-standard production conditions, and a sealing structure is provided at the plunger connecting section 4 to ensure that the sealing conditions between the pump head 1 and the pump body 3 of the plunger pump are good, maintaining the high-standard production environment inside the pump head 1; the plunger power section 8 and the plunger connecting section 4 are connected by plug-in connection and fixed by a first fastener 6 provided through a radial connecting hole 7. The plug-in connection is conducive to simplifying the operation of disassembling and assembling the plunger connecting section 4, and is convenient for replacing the plunger working section 5. The first fastener 6 axially limits the plunger connecting section 4 to avoid wear of the plunger connecting section 4 during the reciprocating motion, so that the movement route of the plunger part changes, and the relative displacement of the plunger connecting section 4 and the plunger moving section is limited to avoid changes in the volumetric efficiency of the plunger part.

[0018] like Figure 3 As shown, the plug-in position of the plunger power section 8 is provided with a first connection hole 301, and the plunger connecting section 4 is provided with an axial connecting rod that cooperates with the first connection hole 301. Since the plunger power section 8 is fixedly connected to the power device, and a spring is provided on the side of the plunger power section 8 away from the plunger connecting section 4, the plunger pump realizes the reciprocating motion of the plunger part through the power device and the spring; the plunger power section 8 is provided with a first connection hole 301, which facilitates the axial connecting rod to be inserted into and locate the radial connection hole 7.

[0019] like Figure 4 As shown, the radial connection hole 7 extends from the outer wall surface of the first connection hole 301 to the inside of the axial connection rod in the radial direction. The radial connection hole 7 set as above is adopted to prevent the first fastener 6 from passing through from one side of the outer wall surface of the first connection hole 301 to the other side due to processing tolerance or assembly, resulting in friction between the end of the first fastener 6 and the inner wall of the chamber where the plunger part is located, resulting in scratches, affecting the volumetric efficiency of the plunger pump and the sealing inside the pump head 1; since the length and diameter of the radial connection hole 7 are not directly affected by the plunger power section 8, it is conducive to selecting the first fastener 6 with a more suitable length-to-diameter ratio, which can effectively prevent the first fastener 6 from being deformed by shear force during the reciprocating linear motion of the plunger power section 8, resulting in deformation or damage of the thread of the first fastener 6, the first fastener 6 cannot be removed, and the plunger part loses the replacement function or even becomes scrapped.

[0020] like Figure 3 As shown, the outer side of the axial connecting rod is provided with a guide protrusion 402, and the inner wall surface of the first connecting hole 301 is provided with a semi-through groove to cooperate with the guide protrusion 402. In order to ensure the sealing of the plunger part itself, the joints of the various parts of the plunger part need to have a smaller tolerance to ensure a tight fit. The use of the guide protrusion 402 is conducive to the insertion of the axial connecting rod of the plunger connecting section 4 into the plunger power section, and the guide protrusion can assist in the splicing of the radial connecting holes 7 located in the plunger power section 8 and the plunger connecting section 4, which is conducive to the insertion of the first fastener 6 into the radial connecting hole 7.

[0021] A second connecting hole 401 is provided on a side of the plunger connecting section 4 away from the axial connecting rod, and the second connecting hole 401 is connected to the plunger working section 5 .

[0022] Combination Figure 1 and Figure 7As shown, the quick-release pump head 1 of the docking type split plunger rod also includes a pump body 3, and the outer surface of the joint between the pump head 1 and the pump body 3 is provided with a pipe clamp 2 surrounding the joint, and the clamp body 201 of the pipe clamp 2 has an opening, and the two sides of the opening are respectively provided with matching parts on the clamp body 201, and the matching parts are connected by a second fastener 202, one end of the second fastener 202 is connected to the limiting member 203, and the other end of the second fastener 202 is an adjusting part 204. The second fastener 202 can control the maximum spacing range of the two mating parts through the adjustment part 204, and control the specific spacing of the two mating parts through the limiter 203, thereby controlling the change in the clamping tightness of the clamp body 201 relative to the pump head 1 and the pump body 3, ensuring the clamping of the pump head 1 and the pump body 3. More importantly, by controlling the positional relationship between the two mating parts of the clamp body 201, the clamp body 201 is kept with a high roundness, thereby ensuring a high coaxiality between the pump head 1 and the pump body 3, as well as the coaxiality of the plunger part inside the pump head 1 and the pump body 3 and the chamber where the plunger part is located. The coaxiality of the pump head 1, the pump body 3, the plunger part and the chamber where the plunger part is located can also be corrected by adjusting the spacing between the two mating parts.

[0023] The stopper 203 has a connecting pin that is rotatably connected to the second fastener 202, and the distance between the mating parts changes during the rotation of the stopper 203. Through the above arrangement, the rotation of the stopper 203 affects the tightness of the connection between the clamp 201 and the pump head 1 and the pump body 3. In certain usage scenarios, the tightness of the connection between the first pump body 3 and the second pump body 3 can be observed and judged by observing the rotation angle of the stopper 203 and the difficulty of rotating the stopper 203, thereby solving the problem that it is difficult to observe the connection between the pump head 1 and the pump body 3 when the pump body 3 connector is installed.

[0024] Embodiment 2 Combination Figure 5 and Figure 6As shown, the difference from the first embodiment is that the radial connection hole 7 penetrates the plunger power section 8 and the plunger connection section 4 in the radial direction. The radial connection hole 7 that radially penetrates the axial connection seat and the plunger power section 8 is adopted, and the first fastener 6 is installed in the radial connection hole 7 to fix the plunger power section 8 and the plunger connection section 4, which is conducive to the accurate positioning of the plunger connection section 4 in the axial direction, avoiding the change of the linear stroke of the plunger connection section 4, avoiding the change of the volumetric efficiency of the plunger pump, and maintaining the flow rate of the plunger pump stable; the plunger power section 8 performs reciprocating linear motion, and the first fastener 6 in the radial connection hole 7 is repeatedly subjected to shear force in the tangential direction. The radial connection hole 7 penetrates the plunger power section 8 and the plunger connection section 4, which can increase the force points of the first fastener 6 and avoid the first fastener 6 from being deformed or broken in the radial connection hole 7. Furthermore, the longer radial connecting hole allows the first fastener 6 to adopt a shoulder screw. The middle section of the shoulder screw has an axis, which can better bear the shear force of the reciprocating linear motion of the plunger power section 8, thereby avoiding deformation or damage of the thread of the first fastener 6, resulting in the first fastener 6 being unable to be removed, the plunger part losing its replacement function or even being scrapped.

[0025] Another difference from the first embodiment is that the inner wall surface of the first connection hole 301 is a polygon, and the shape of the axial connection rod matches the first connection hole 301. The inner wall surface of the first connection hole 301 is a polygon, and the polygon has multiple edges. The edges have a guiding function and can still maintain the guiding and limiting effects after slight wear, which is conducive to the insertion of the axial connection rod into the first connection hole 301; the polygon can limit the rotation of the axial connection rod, which is convenient for the splicing of the plunger power section 8 and the plunger connection section 4 of the radial connection hole 7, and is conducive to the insertion of the first fastener 6 into the radial connection hole 7.

[0026] The present invention provides a quick-release pump head 1 with a docking split plunger rod, so that the pump head 1 and the matching plunger rod become replaceable parts, and the plunger rod can still have a long service life after becoming a replaceable part; it ensures that the plunger rod is accurately positioned during the reciprocating motion, maintains the flow rate of the plunger pump stable, and keeps the plunger pump at a high volumetric efficiency; improves the assembly efficiency of the split plunger rod, which is conducive to saving the working time of repeatedly disassembling and assembling the plunger rod, and reduces the work intensity of disinfection and washing, and has the following beneficial effects: the plunger connecting section 4 serves as a transition area between the disinfection environment and the general environment, so that the plunger rod contacts the part of the fluid being transported and contacts the power of the plunger pump Partial separation facilitates the disinfection of the plunger working section 5 and the plunger connecting section 4, ensuring that the inside of the pump head 1 of the plunger pump has high-standard production conditions; and a sealing structure is set at the plunger connecting section 4 to ensure that the sealing conditions between the pump head 1 and the pump body 3 of the plunger pump are good, maintaining a high-standard production environment inside the pump head 1; the plug-in connection is conducive to simplifying the operation of disassembling and assembling the plunger connecting section 4, and facilitating the replacement of the plunger working section 5; avoiding wear of the plunger connecting section 4 and the chamber where the plunger part is located during the reciprocating motion, causing the movement route of the plunger part to change, limiting the relative displacement of the plunger connecting section 4 and the plunger moving section, and avoiding changes in the volumetric efficiency of the plunger part.

[0027] The above embodiments and / or implementation methods 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 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.

Claims

1. A quick-release pump head with a docking-type split plunger rod, comprising a pump head (1) and a pump body (3), wherein the pump head (1) and the pump body (3) have a plunger portion inside, characterized in that: The plunger portion comprises a plunger working section (5) and a plunger power section (8); a plunger connecting section (4) is provided between the plunger working section (5) and the plunger power section (8); the plunger power section (8) and the plunger connecting section (4) are axially plugged; and a radial connecting hole (7) is provided at the connection between the plunger power section (8) and the plunger connecting section (4).

2. A quick-release pump head with a docking split plunger rod according to claim 1, characterized in that: The plug-in position of the plunger power section (8) is provided with a first connection hole (301), and the plunger connection section (4) is provided with an axial connection rod that cooperates with the first connection hole (301).

3. A quick-release pump head with a docking split plunger rod according to claim 2, characterized in that: The radial connection hole (7) penetrates the plunger power section (8) and the plunger connection section (4) in the radial direction.

4. A quick-release pump head with a docking split plunger rod according to claim 2, characterized in that: The radial connection hole (7) extends in a radial direction from an outer wall surface of the first connection hole (301) to the interior of the axial connection rod.

5. A quick-release pump head with a docking split plunger rod according to claim 4, characterized in that: A guide protrusion is provided on the outer side surface of the axial connecting rod, and a semi-through groove is provided on the inner wall surface of the first connecting hole (301) to cooperate with the guide protrusion.

6. A quick-release pump head with a docking split plunger rod according to claim 3 or 5, characterized in that: A second connection hole is provided on a side of the plunger connection section (4) away from the axial connection rod, and the second connection hole is connected to the plunger working section (5).

7. A quick-release pump head with a docking split plunger rod according to claim 3, characterized in that: The inner wall surface of the first connecting hole (301) is polygonal, and the outer shape of the axial connecting rod matches the first connecting hole (301).

8. A quick-release pump head with a docking split plunger rod according to claim 7, characterized in that: A pipe clamp (2) surrounding the joint is provided on the outer surface of the joint between the pump head (1) and the pump body (3); the pipe clamp (2) comprises a clamp body (201) having an opening; matching portions are provided on both sides of the opening on the clamp body (201); the matching portions are connected via a second fastener (202); and one end of the second fastener (202) is connected to a limiting member (203).

9. A quick-release pump head with a docking split plunger rod according to claim 8, characterized in that: The limiting member (203) has a connecting pin rotatably connected to the second fastening member (202).

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