A split block detachable pump head with butt-jointed plunger segmentation

Abstract

The present invention belongs to the technical field of plunger pumps, and provides a split block detachable pump head with a docking plunger segment. A split block detachable pump head with a docking plunger segment comprises a pump head and a pump body, wherein the pump head and the pump body have a plunger rod inside, and the plunger rod comprises a first plunger segment and a second plunger segment connected to each other, wherein the first plunger segment and the second plunger segment are both located inside the pump body, and the connection between the first plunger segment and the second plunger segment has a nested portion, wherein the nested portion is provided with a radial connecting hole, and a first fastener is provided in the radial connecting hole. The above arrangement is conducive to fully disinfecting and washing the inside and outside of the plunger pump; the nested portion is axially staggered, which can improve the bearing capacity of the axial load and radial load of the first plunger segment and the second plunger segment, and improve the overall stiffness of the plunger rod; the relative position of the second plunger segment and the first plunger segment is positioned by using a radial connecting hole, which can ensure that the volumetric efficiency of the plunger pump remains stable.

Description

Technical Field

[0001] The invention relates to the technical field of plunger pumps and provides a split block detachable pump head with a butt-jointed plunger segment. 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 purpose of the present invention is to enable the pump head, pump body and plunger rod to be repeatedly and quickly disassembled and assembled, and to maintain the split plunger rod with sufficient overall rigidity and sufficient stability of each component. Secondly, ensure that the split plunger rod is accurately positioned during the reciprocating motion, maintain the plunger pump at a stable volumetric efficiency, and maintain the flow rate of the plunger pump to deliver fluid stability; 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 split block detachable pump head with a docking plunger segment, including a pump head and a pump body, a plunger rod inside the pump head and the pump body, the plunger rod includes a first plunger section and a second plunger section connected, the first plunger section and the second plunger section are both located inside the pump body, and the connection between the first plunger section and the second plunger section has a nested portion, the nested portion is provided with a radial connecting hole, and a first fastener is provided in the radial connecting hole. In addition to one end of the first plunger section being connected to the second plunger section, the other end is close to the pump head part of the plunger pump. The plunger rod also includes a third plunger section, one end of which is located inside the pump body, and the other end of the third plunger section is located inside the pump head. One end of the second plunger section is connected to the first plunger section, and the other end is close to the third plunger section. Through the above arrangement, the pump head, pump body and plunger rod of the plunger rod can be disassembled or assembled in sequence, which is conducive to sufficient disinfection and washing of the inside and outside of the plunger pump; a nested part is provided at the connection between the first plunger section and the second plunger section, and when the first plunger section and the second plunger section are in a connected state, the nested part is axially staggered, and has multiple axial and radial connection surfaces that bear axial loads and radial loads respectively, which can improve the bearing capacity of the axial load and radial load of the first plunger section and the second plunger section, and improve the overall stiffness of the plunger rod; radial connecting holes are used to connect the second plunger section and the first plunger section relative to each other. The position is positioned to ensure the displacement accuracy of the reciprocating movement of the plunger rod, and since the cross-sectional area of ​​the plunger rod is fixed, the displacement accuracy of the reciprocating movement of the plunger rod directly affects the volume change of the internal cavity of the pump head. The above-mentioned arrangement can ensure that the volumetric efficiency of the plunger pump remains stable; since the first plunger segment and the second plunger segment are nested with each other and the radial directions are limited to each other, it is beneficial to improve the coaxiality of the first plunger segment and the second plunger segment. Since the first plunger segment is connected to the power device of the plunger pump, the friction of the second plunger segment on the chamber where the plunger rod is located can be reduced when the first plunger segment drives the second plunger segment to move.

[0004] Preferably, the pump body includes a first pump body and a second pump body, the first pump body is connected to the pump head, a vertical guide mechanism is provided between the first pump body and the second pump body, the first pump body and the second pump body are relatively moved by the guide mechanism, and a stopper is provided at the end of the guide mechanism. The use of a vertical guide mechanism and the setting of a stopper only at the end of the guide mechanism are conducive to the first pump body and the second pump body being assembled using the guide mechanism and the stopper, and because the guide mechanism is a vertical mechanism, it can be installed by the weight of the pump body itself, and the stopper ensures that the two parts of the pump body are quickly and accurately installed in the corresponding position; the stopper is located at the end of the guide mechanism, does not block the guide mechanism, and the guide mechanism does not have other obstructions in the horizontal direction, the guide mechanism can be assembled in the horizontal direction, and therefore the first pump body and the second pump body can also be assembled in the horizontal direction.

[0005] Preferably, the radial connection hole penetrates the first plunger section and the second plunger section in the radial direction, the first fastener cooperates with the radial connection hole to penetrate the second plunger section, and the length of the first fastener is less than the diameter of the second plunger section. The radial connection hole is installed with 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, and because the cross-sectional area of ​​the plunger rod is fixed, the linear stroke change of the reciprocating movement of the plunger rod directly affects the volume change of the internal cavity of the pump head. Through the above arrangement, the volumetric efficiency of the plunger pump can be avoided and the flow rate of the plunger pump can be kept stable; because the first plunger section drives the second plunger section to perform reciprocating linear motion, the first fastener in the radial connection hole is repeatedly subjected to shear force in the tangential direction, and the radial connection hole penetrates the first plunger section and the second plunger 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, the middle section of which has an axis, which can better bear the shear force of the reciprocating linear motion of the plunger power section, avoiding deformation or damage of the first fastener thread, resulting in the inability to remove the fastener, the plunger part losing the replacement function or even being scrapped; the length of the first fastener is smaller than the diameter of the second plunger section, and the end of the first fastener avoids friction with the inner wall of the chamber of the pump body where the plunger rod is located, resulting in scratches, affecting the sealing of the plunger pump, and the fluid transported in the pump head flows out from the scratches, affecting the volumetric efficiency of the plunger pump.

[0006] Preferably, the radial connection hole extends from the outer wall surface of the plunger rod to the inside of the plunger rod in the radial direction. The radial connection hole set as above can reduce the machining accuracy of the thickness or diameter of the radial connection hole and the axial connection section of the second plunger section, and can prevent the first fastener from passing from one side of the outer wall surface of the plunger rod to the other side due to machining tolerance or assembly tolerance. The end is not easily worn and deformed, causing the first fastener to fail, unable to be installed or lose the fastening effect, thereby increasing the service life of wearing parts; and causing the end of the first fastener to interfere with the inner wall of the chamber where the plunger rod is located, affecting the coaxiality of the plunger rod and the inner wall of the chamber where the plunger rod is located, thereby affecting the sealing performance between the plunger rod and the pump head. And avoid the end of the first fastener from rubbing against the inner wall of the chamber where the plunger rod is located, causing scratches, affecting the sealing of the plunger pump, and the fluid transported in the pump head flowing out from the scratches, affecting the volumetric efficiency of the plunger pump; since the length and diameter of the first fastener are not directly affected by the plunger power section, it is conducive to selecting a fastener with a more suitable length-to-diameter ratio, improving the ability of the fastener to withstand shear force, and in the process of the first plunger section driving the second plunger section to reciprocate, it is avoided that the first fastener is deformed or the thread is damaged, resulting in the first fastener being unable to be removed, the plunger rod losing the split replacement function or even the pump body being scrapped.

[0007] Preferably, the first plunger section is provided with a first connecting hole in the nesting part, and the second plunger section is provided with an axial connecting section in the nesting part to cooperate with the first connecting hole. Since the first plunger section is fixedly connected to the power device of the plunger pump, and a spring is provided on the side of the first plunger section away from the second plunger section, the plunger pump realizes the reciprocating motion of the plunger section through the power device and the spring; the first plunger section is provided with a first connecting hole to facilitate the insertion of the axial connecting rod and the positioning of the radial connecting hole.

[0008] Preferably, the guide mechanism includes a guide rail, and the second pump body is provided with a guide rail, and the guide rail includes a first guide rail and a second guide rail, and the first guide rail and the second guide rail have an angle α. The angle α is an obtuse angle. Due to the existence of the angle α, the distance between the guide rails on both sides of the guide mechanism will gradually decrease, and the first pump body and the second pump body can be guided to align to the assembly position, and when the blocking body at the end of the guide mechanism fails, the first pump body is clamped by the second pump bodies on both sides to prevent the first pump body from sliding down or even falling together with the pump head; when the first pump body is subjected to abnormal loads and impacts transmitted by the pump head, the second pump body can use the angle to convert the load in a single direction into loads in the horizontal and vertical directions, and bear loads in different directions.

[0009] Preferably, the guide rail is a trough body, and the guide mechanism also includes a slider matched with the trough body. The first pump body is provided with at least two sliders, and the first guide rail and the second guide rail each have at least one slider matched. A further slider can be a V-block. Since the first pump body and the second pump body are assembled by a guide structure, a plurality of sliders can increase the assembly connection points of the first pump body and the second pump body in the vertical direction, improve the assembly accuracy of the first pump body and the second pump body and reduce the assembly error; since the size of the slider is smaller than that of the first pump body and the second pump body, and there is a gap between the slider and the trough body, when the second pump body of the first pump head is relatively tilted, the parallelism of the first pump body and the second pump body during the assembly process is affected; the V-block mainly plays a limiting role when the first pump body and the second pump body are assembled vertically to prevent the first pump body and the second pump body from being separated. When the first pump body and the second pump body are assembled horizontally, the V-angle of the V-block has a guiding role in the horizontal direction.

[0010] Preferably, the axial cross-section of the inner wall surface of the first connecting hole is polygonal, and the shape of the axial connecting section matches the first connecting hole.

[0011] Preferably, the outer side surface of the axial connection section is provided with a guide protrusion, and the inner wall surface of the first connection hole is provided with a semi-through groove matched with the guide protrusion. In order to ensure the sealing and overall rigidity of the plunger rod itself, the joints of the various parts of the plunger rod need to have a smaller tolerance to ensure a tight fit. The polygonal edges and the guide protrusion both have a guiding function, which is conducive to the insertion of the axial connection section into the first connection hole; the polygon and the guide protrusion can limit the rotation of the axial connection rod, which is convenient for the radial connection hole located in the first plunger section and the second plunger section to complete the splicing, and the first fastener can be inserted into the radial connection hole.

[0012] Preferably, the blocking body includes a first blocking body and a second blocking body, wherein the first blocking body is located above the guide mechanism and on the top of the first pump body, and the second blocking body is located below the guide mechanism and on the bottom of the second pump body. The second blocking body is conducive to blocking the pump body from being assembled under its own weight, thereby ensuring that the two parts are quickly and accurately installed in the corresponding positions; the second blocking body presses the first pump body tightly on the second pump body, thereby preventing the first pump body and the second pump body from tilting and falling out due to impact or vibration in the vertical direction.

[0013] The present invention provides 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 the pump head, pump body and plunger rod can be repeatedly and quickly disassembled and assembled, and the split plunger rod is maintained with sufficient overall rigidity, so that each component of the split plunger rod has sufficient stability; the split plunger rod is accurately positioned during the reciprocating motion, the plunger pump is maintained at a stable volumetric efficiency, and the flow rate of the fluid transported by the plunger pump is maintained stable; the assembly efficiency of the split plunger rod is improved, which is conducive to saving the working time of repeatedly disassembling and assembling the plunger rod, and reducing the working intensity of disinfection and washing, and has the advantages of The following beneficial effects are achieved: when the first plunger segment and the second plunger segment are in a connected state, they have multiple axial and radial connection surfaces that bear the axial load and radial load respectively, which can improve the bearing capacity of the axial load and radial load of the first plunger segment and the second plunger segment, and improve the overall stiffness of the plunger rod; the radial connecting hole positions the relative position of the second plunger segment and the first plunger segment to ensure the displacement accuracy of the reciprocating movement of the plunger rod, and since the cross-sectional area of ​​the plunger rod is fixed, the displacement accuracy of the reciprocating movement of the plunger rod directly affects the volume change of the internal cavity of the pump head. The above arrangement can ensure that the volumetric efficiency of the plunger pump remains stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the first pump body of the present invention;

[0017] Figure 3 It is a structural schematic diagram of the second pump body of the present invention;

[0018] Figure 4 This is a schematic diagram of the split structure of the first embodiment of the present invention;

[0019] Figure 5 It is a cross-sectional structural schematic diagram of the first embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the split structure of the second embodiment of the present invention;

[0021] Figure 7 It is a cross-sectional structural schematic diagram of the second embodiment of the present invention;

[0022] Figure 8It is a schematic structural diagram of the second plunger section of the second embodiment of the present invention.

[0023] Explanation of the reference numerals: 1 first pump body; 101 first stopper body; 102 slider; 2 second pump body; 201 first guide rail; 202 second guide rail; 203 second stopper body; 3 third pump body; 4 plunger rod; 401 first plunger section; 402 second plunger section; 403 third plunger section; 404 first fastener; 405 radial connecting hole; 406 first connecting hole; 407 second connecting hole; 408 guide protrusion; 5 pump head; 6 second fastener; 7 third fastener; 8 fourth fastener. DETAILED DESCRIPTION

[0024] 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.

[0025] Embodiment 1

[0026] Combination Figure 1 and Figure 2 As shown, a docking type plunger segmented split block detachable pump head 5 includes a pump head 5 and a pump body, wherein the pump head 5 and the pump body have two plunger rods 4 inside, and the plunger rod 4 includes a first plunger segment 401 and a second plunger segment 402 connected to each other, wherein the first plunger segment 401 and the second plunger segment 402 are both located inside the pump body, and the connection between the first plunger segment 401 and the second plunger segment 402 has a nested portion, wherein the nested portion is provided with a radial connection hole 405, and a first fastener 404 is provided inside the radial connection hole 405. In addition to one end of the first plunger segment 401 being connected to the second plunger segment 402, the other end is close to the pump head 5 of the plunger pump. The plunger rod 4 also includes a third plunger segment 403, wherein one end of the third plunger segment 403 is located inside the pump body, and the other end of the third plunger segment 403 is located inside the pump head 5. In addition to one end of the second plunger segment 402 being connected to the first plunger segment 401, the other end is close to the third plunger segment 403. In this embodiment, a second connecting hole 407 is provided at one end of the second plunger section 402 close to the third plunger section 403 , and the third plunger section 403 is fixed inside the second connecting hole 407 .

[0027] Through the above-mentioned arrangement, the pump head 5, the pump body and the plunger rod 4 of the plunger rod 4 can be disassembled or assembled in sequence, which is conducive to sufficient disinfection and washing of the inside and outside of the plunger pump; a nested part is arranged at the connection between the first plunger segment 401 and the second plunger segment 402, and when the first plunger segment 401 and the second plunger segment 402 are in the connected state, the nested part is axially staggered, and has multiple axial and radial connection surfaces to bear the axial load and radial load respectively, which can improve the bearing capacity of the axial load and radial load of the first plunger segment 401 and the second plunger segment 402, and improve the overall stiffness of the plunger rod 4; the radial connecting hole 405 is used to position the relative position of the second plunger segment 402 and the first plunger segment 401 to ensure the displacement accuracy of the reciprocating movement of the plunger rod 4, and since the cross-sectional area of ​​the plunger rod 4 is fixed, the displacement accuracy of the reciprocating movement of the plunger rod 4 directly affects the volume change of the internal cavity of the pump head 5, and the above-mentioned arrangement can ensure that the volumetric efficiency of the plunger pump remains stable.

[0028] It should be noted that the material and shape of the third plunger segment 403 are selected according to the model of the plunger pump, that is, the properties of the fluid that the plunger pump needs to transport, flow rate and other parameters. The third plunger segment 403 and the second plunger segment 402 are only welded and fixed by the second connecting hole 407 in this embodiment. In addition, the number of plunger rods can be one or any other number.

[0029] Combination Figure 1 , Figure 2 and Figure 3 As shown, the pump body includes a first pump body 1 and a second pump body 2, the first pump body 1 is connected to a pump head 5, a vertical guide mechanism is provided between the first pump body 1 and the second pump body 2, the first pump body 1 and the second pump body 2 move relative to each other using the guide mechanism, and a stopper is provided at the end of the guide mechanism. The stopper includes a first stopper 101 and a second stopper 203, the first stopper 101 is located above the guide mechanism and the top of the first pump body 1, and the second stopper 203 is located below the guide mechanism and the bottom of the second pump body 2. A second fastener 6 is vertically provided at the first stopper 101, and the second fastener 6 connects the first pump body 1 and the second pump body 2; the pump body also includes a third pump body 3, and an axial third fastener 7 and a radial fourth fastener 8 are provided between the second pump body 2 and the third pump body 3.

[0030] Through the above arrangement, the second stopper 203 is conducive to blocking the pump body from below when it is assembled by its own weight, ensuring that the two parts are quickly and accurately installed in the corresponding positions; the second stopper 203 presses the first pump body 1 on top of the second pump body 2, which can prevent the first pump body 1 and the second pump body 2 from tilting and falling out due to impact or vibration in the vertical direction. The use of a vertical guide mechanism and the setting of a stopper only at the end of the guide mechanism are conducive to the first pump body 1 and the second pump body 2 being assembled by the guide mechanism and the stopper, and because the guide mechanism is a vertical mechanism, it can be installed by the weight of the pump body, and the stopper ensures that the two parts of the pump body are quickly and accurately installed in the corresponding positions; the stopper is located at the end of the guide mechanism, and the guide mechanism is not blocked in the horizontal direction, and the guide mechanism can be assembled in the horizontal direction, so the first pump body 1 and the second pump body 2 can also be assembled in the horizontal direction.

[0031] Combination Figure 4 , Figure 5 As shown, the radial connecting hole 405 penetrates the first plunger segment 401 and the second plunger segment 402 in the radial direction, the first fastener 404 cooperates with the radial connecting hole 405 to penetrate the second plunger segment 402, and the length of the first fastener 404 is smaller than the diameter of the second plunger segment 402. The radial connecting hole 405 is used to install fasteners to fix the plunger power section and the plunger connecting section, which is beneficial to the accurate positioning of the plunger connecting section in the axial direction and avoids changes in the linear stroke of the plunger connecting section. Since the cross-sectional area of ​​the plunger rod 4 is fixed, the change in the linear stroke of the reciprocating movement of the plunger rod 4 directly affects the volume change of the internal cavity of the pump head 5. Through the above-mentioned arrangement, the volumetric efficiency of the plunger pump can be avoided and the flow rate of the plunger pump can be kept stable. Since the first plunger section 401 drives the second plunger section 402 to perform reciprocating linear motion, the first fastener 404 in the radial connecting hole 405 is repeatedly subjected to shear force in the tangential direction. The radial connecting hole 405 passes through the first plunger section 401 and the second plunger section 402, which can increase the force points of the first fastener 404 and avoid deformation or breakage of the first fastener 404 in the radial connecting hole 405. Furthermore, the first fastener 404 can be a shoulder screw, the middle section of which has an axis, which can better bear the shear force of the reciprocating linear motion of the plunger power section, thereby avoiding deformation or damage of the thread of the first fastener 404, resulting in the inability to remove the fastener, the plunger part losing the replacement function or even being scrapped; the length of the first fastener 404 is smaller than the diameter of the second plunger section 402, and the end of the first fastener 404 avoids friction with the inner wall of the chamber of the pump body where the plunger rod 4 is located, resulting in scratches, affecting the sealing of the plunger pump, and the fluid transported in the pump head 5 flows out from the scratches, affecting the volumetric efficiency of the plunger pump.

[0032] The first plunger section 401 is provided with a first connection hole 406 at the nesting part, and the second plunger section 402 is provided with an axial connection section at the nesting part to match the first connection hole 406. Since the first plunger section 401 is fixedly connected to the power device of the plunger pump, and a spring is provided on the side of the first plunger section 401 away from the second plunger section 402, the plunger pump realizes the reciprocating motion of the plunger part through the power device and the spring; the first plunger section 401 is provided with the first connection hole 406, so that the axial connection rod can be inserted into and locate the radial connection hole 405.

[0033] like Figure 3 As shown, the guide mechanism includes a guide rail, and the second pump body 2 is provided with a guide rail, and the guide rail includes a first guide rail 201 and a second guide rail 202, and the first guide rail 201 and the second guide rail 202 have an angle α. The angle α is an obtuse angle. Due to the existence of the angle α, the distance between the guide rails on both sides of the guide mechanism will gradually decrease, which can guide the first pump body 1 and the second pump body 2 to align to the assembly position, and when the blocking body at the end of the guide mechanism fails, the first pump body 1 is clamped by the second pump bodies 2 on both sides to prevent the first pump body 1 from sliding down or even falling together with the pump head 5; when the first pump body 1 is subjected to abnormal loads and impacts transmitted by the pump head 5, the second pump body 2 can use the angle to convert the load in a single direction into loads in the horizontal and vertical directions, and bear loads in different directions.

[0034] Combination Figure 2 and Figure 3 As shown, the guide rail is a groove body, and the guide mechanism also includes a slider 102 that cooperates with the groove body. The first pump body 1 is provided with at least two sliders 102, and the first guide rail 201 and the second guide rail 202 each have at least one slider 102 that cooperates. Further, the slider 102 can be selected as a V-block. Since the first pump body 1 and the second pump body 2 are spliced ​​by the guide structure, multiple sliders 102 can increase the assembly connection points of the first pump body 1 and the second pump body 2 in the vertical direction, improve the assembly accuracy of the first pump body 1 and the second pump body 2 and reduce the assembly error; since the size of the slider 102 is smaller than that of the first pump body 1 and the second pump body 2, and there is a gap between the slider 102 and the groove body, when the second pump body 2 of the first pump head 5 is relatively tilted, the parallelism of the first pump body 1 and the second pump body 2 is affected during the splicing process; the V-block mainly plays a limiting role when the first pump body 1 and the second pump body 2 are vertically assembled to prevent the first pump body 1 and the second pump body 2 from being separated. When the first pump body 1 and the second pump body 2 are horizontally spliced, the V-shaped angle of the V-block has a horizontal guiding role.

[0035] Embodiment 2

[0036] Different from the first embodiment, Figure 6 and Figure 7As shown, the radial connection hole 405 extends from the outer wall surface of the plunger rod 4 to the inside of the plunger rod 4 in the radial direction. The radial connection hole 405 provided as above can prevent the first fastener 404 from penetrating from one side of the outer wall surface of the plunger rod 4 to the other side due to processing tolerance or assembly tolerance, causing the end of the first fastener 404 to interfere with the inner wall of the chamber where the plunger rod 4 is located, affecting the coaxiality of the plunger rod 4 and the inner wall of the chamber where the plunger rod 4 is located, thereby affecting the sealing performance between the plunger rod 4 and the pump head 5, and preventing the end of the first fastener 404 from rubbing against the inner wall of the chamber where the plunger rod 4 is located, causing scratches, and affecting the plunger pump. Sealing: the fluid transported in the pump head 5 flows out from the scratch, affecting the volumetric efficiency of the plunger pump; since the length and diameter of the first fastener 404 are not directly affected by the plunger power section, it is conducive to selecting a fastener with a more suitable length-to-diameter ratio, thereby improving the fastener's ability to withstand shear force. During the reciprocating motion of the first plunger section 401 driving the second plunger section 402, deformation of the first fastener 404 or damage to the thread is avoided, resulting in the first fastener 404 being unable to be removed, the plunger rod 4 losing the split replacement function, or even the pump body being scrapped.

[0037] Combination Figure 6 and Figure 8 As shown, the inner wall surface of the first connection hole 406 is a polygon, and the shape of the axial connection rod matches the first connection hole 406. The inner wall surface of the first connection hole 406 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 406; the polygon can limit the rotation of the axial connection rod, which is convenient for the splicing of the channel of the plunger power section part and the plunger connection section part of the radial connection hole 405, and is conducive to the insertion of the first fastener 404 into the radial connection hole 405.

[0038] Also different from the first embodiment, Figure 6 and Figure 8 As shown, the outer side surface of the axial connection section is provided with a guide protrusion 408, and the inner wall surface of the first connection hole 406 is provided with a semi-through groove matched with the guide protrusion 408. In order to ensure the sealing and overall rigidity of the plunger rod 4 itself, the joints of the various parts of the plunger rod 4 require a smaller tolerance to ensure a tight fit. The polygonal edges and the guide protrusion 408 both have a guiding function, which is conducive to the insertion of the axial connection section into the first connection hole 406; the polygon and the guide protrusion 408 can limit the rotation of the axial connection rod, so that the radial connection hole 405 is located in the first plunger section 401 and the second plunger section 402. The channel is spliced, and the first fastener 404 can be inserted into the radial connection hole 405. It should be noted that a guide protrusion 408 can also be added on the basis of the first embodiment to achieve the above technical effect.

[0039] The present invention provides a quick-release pump head 5 of a docking split plunger rod 4, so that the pump head 5 and the matching plunger rod 4 become replaceable parts, and the pump head 5, pump body and plunger rod 4 can be repeatedly and quickly disassembled and assembled, and the split plunger rod 4 is maintained to have sufficient overall rigidity, ensuring that the various components of the split plunger rod 4 have sufficient stability; ensuring that the split plunger rod 4 is accurately positioned during the reciprocating motion, maintaining the plunger pump at a stable volumetric efficiency, and maintaining the flow rate of the fluid transported by the plunger pump stable; improving the assembly efficiency of the split plunger rod 4, which is conducive to saving the working time of repeatedly disassembling and assembling the plunger rod 4, reducing the working intensity of disinfection and washing, and has the following beneficial effects: first, When the plunger segment 401 and the second plunger segment 402 are in the connected state, they have multiple axial and radial connection surfaces that bear the axial load and radial load respectively, which can improve the axial load and radial load bearing capacity of the first plunger segment 401 and the second plunger segment 402, and improve the overall stiffness of the plunger rod 4; the radial connecting hole 405 positions the relative position of the second plunger segment 402 and the first plunger segment 401 to ensure the displacement accuracy of the reciprocating movement of the plunger rod 4, and since the cross-sectional area of ​​the plunger rod 4 is fixed, the displacement accuracy of the reciprocating movement of the plunger rod 4 directly affects the volume change of the internal cavity of the pump head 5. The above-mentioned arrangement can ensure that the volumetric efficiency of the plunger pump remains stable.

[0040] 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 butt-jointed plunger segmented split block detachable pump head, comprising a pump head (5) and a pump body, wherein the pump head (5) and the pump body have a plunger rod (4) inside, characterized in that: The pump body comprises a first pump body (1) and a second pump body (2), the first pump body (1) being connected to the pump head (5), a vertical guide mechanism being provided between the first pump body (1) and the second pump body (2), the first pump body (1) and the second pump body (2) being relatively movable by the guide mechanism, a stopper being provided at the end of the guide mechanism; The guide mechanism comprises a guide rail, the second pump body (2) is provided with a guide rail, and the guide rail comprises a first guide rail (201) and a second guide rail (202); The guide rail is a groove body, and the guide mechanism further comprises a slider (102) matched with the groove body, the first pump body (1) is provided with at least two sliders (102), and the first guide rail (201) and the second guide rail (202) each have at least one slider (102) matched with each other; The baffle body comprises a first baffle body (101) and a second baffle body (203), wherein the first baffle body (101) is located above the guide mechanism and at the top of the first pump body (1), and the second baffle body (203) is located below the guide mechanism and at the bottom of the second pump body (2).

2. A docking type plunger segmented split block detachable pump head according to claim 1, characterized in that: The plunger rod (4) comprises a first plunger section (401) and a second plunger section (402) connected to each other, the first plunger section (401) and the second plunger section (402) are both located inside the pump body, a nested portion is provided at the connection between the first plunger section (401) and the second plunger section (402), the nested portion is provided with a radial connection hole (405), and a first fastener (404) is provided in the radial connection hole (405).

3. A docking type plunger segmented split block detachable pump head according to claim 2, characterized in that: The radial connection hole (405) penetrates the first plunger section (401) and the second plunger section (402) in a radial direction, the first fastener (404) cooperates with the radial connection hole (405) to penetrate the second plunger section (402), and the length of the first fastener (404) is smaller than the diameter of the second plunger section (402).

4. A docking type plunger segmented split block detachable pump head according to claim 2, characterized in that: The radial connection hole (405) extends in a radial direction from the outer wall surface of the plunger rod (4) to the interior of the plunger rod (4).

5. A docking type plunger segmented split block detachable pump head according to claim 3 or 4, characterized in that: The first plunger section (401) is provided with a first connecting hole (406) in the nesting portion, and the second plunger section (402) is provided with an axial connecting section in the nesting portion to cooperate with the first connecting hole (406).

6. A docking type plunger segmented split block detachable pump head according to claim 5, characterized in that: The guide mechanism comprises a guide rail, the second pump body (2) is provided with a guide rail, the guide rail comprises a first guide rail (201) and a second guide rail (202), and the first guide rail (201) and the second guide rail (202) have an included angle α.

7. A docking type plunger segmented split block detachable pump head according to claim 5, characterized in that: The axial cross-section of the inner wall surface of the first connecting hole (406) is polygonal, and the outer shape of the axial connecting section matches the first connecting hole (406).

8. A docking type plunger segmented split block detachable pump head according to claim 5, characterized in that: A guide protrusion (408) is provided on the outer side surface of the axial connection section, and a semi-through groove is provided on the inner wall surface of the first connection hole (406) to cooperate with the guide protrusion (408).

Images