High-precision homogenizer plunger pump

Abstract

The high-precision homogenizer plunger pump comprises a pump body, a first sealing ring, a plunger, a crankcase, a piston cylinder, a piston, a guide ring, a connecting rod and a crankshaft, a plunger cavity with one open end is formed in the pump body, the first sealing ring is installed at the open end of the plunger cavity, one end of the plunger penetrates through the first sealing ring and extends into the plunger cavity, and the other end of the plunger penetrates through the piston cylinder. The crankcase is connected with the pump body and provided with an installation hole, the piston cylinder is installed in the installation hole and provided with a piston hole in the axis direction, the piston is slidably connected into the piston hole and connected with the other end of the plunger, the outer surface of the piston is provided with a limiting groove, the guide ring is installed in the limiting groove, and the outer ring abuts against the inner wall of the piston hole. The crankshaft is movably connected with the connecting rod and rotationally installed on the crankcase. Abrasion between the outer surface of the piston and the inner wall of the piston hole can be avoided, the coaxiality of the piston barrel and the piston can be better guaranteed, stable movement of the piston is guaranteed, and then stable movement of the plunger is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to homogenizer technical field, especially in high accuracy homogenizer plunger pump. BACKGROUND

[0002] Homogenization refers to the processing process of refinement and uniform mixing of materials in the homogenization valve, the homogenizer is a special equipment and key equipment for liquid material homogenization and high pressure delivery, and the homogenization effect influences the quality of products. The main functions of the homogenizer include improving the uniformity and stability of products, increasing the shelf life, reducing the reaction time to save a large amount of catalyst or additive, changing the consistency of products, improving the taste and color of products and the like.

[0003] The homogenizer uses a plunger pump as a power transmission and material delivery mechanism to deliver materials to a homogenization unit. During the process of the materials to be processed through the homogenization unit, strong shearing, impact and cavitation are generated under high pressure, so that liquid substances or solid particles with liquid as a carrier are super-finely refined. The plunger pump includes a crankshaft transmission structure, the crankshaft transmission structure includes a crankshaft, a connecting rod, a piston, a cylinder body, a plunger and a box body with a plunger cavity, the crankshaft rotates, drives the piston to move back and forth in the cylinder body through the connecting rod, and drives the plunger to move back and forth in the plunger cavity. In the plunger pump of the homogenizer of the prior art, the piston moves back and forth in the piston cylinder, and the contact surface of the piston and the piston cylinder is prone to wear when the piston moves back and forth in the piston cylinder, which affects the coaxiality of the piston and the piston cylinder and cannot guarantee that the plunger always moves in the axial direction. SUMMARY

[0004] The utility model discloses at least solve one of the prior art technical problems. Therefore, the utility model provides a high accuracy homogenizer plunger pump, solves the problem that the contact surface of the piston and the piston cylinder is prone to wear when the piston moves back and forth in the piston cylinder in the prior art, which affects the coaxiality of the piston and the piston cylinder and cannot guarantee that the plunger always moves in the axial direction.

[0005] The high accuracy homogenizer plunger pump according to the utility model embodiment comprises:

[0006] A pump body is provided with a plunger cavity with an open end, and a plunger hole is arranged on the bottom wall of the plunger cavity;

[0007] A first sealing ring is installed at the open end of the plunger cavity;

[0008] A plunger is inserted into the plunger cavity through the first sealing ring at one end, and the first sealing ring abuts against the plunger;

[0009] A crankcase is connected to the pump body, and a mounting hole is arranged on the crankcase, which is coaxial with the plunger cavity;

[0010] A piston cylinder is installed in the mounting hole and is provided with a piston hole along the axial direction.

[0011] A piston is slidingly connected in the piston hole and is connected to the other end of the plunger, and the outer surface of the piston is provided with a limiting groove in the circumferential direction.

[0012] A guide ring is installed in the limiting groove and the outer ring abuts against the inner wall of the piston hole.

[0013] A connecting rod is movably connected to the piston.

[0014] A crankshaft is movably connected to the connecting rod and is rotatably installed on the crankcase.

[0015] The high-precision homogenizer plunger pump has at least the following beneficial effects:

[0016] The rotation of the crankshaft drives the connecting rod to move, drives the piston to move back and forth in the piston cylinder, drives the plunger to move back and forth in the plunger cavity, drives the air to be discharged or sucked along the plunger hole, realizes the air suction and discharge of the plunger pump, the mounting hole is arranged on the crankcase, the piston cylinder is installed in the mounting hole, the piston is slidingly connected in the piston cylinder, the limiting groove is arranged on the piston, the guide ring is installed in the limiting groove, the guide ring is in contact with the inner wall of the piston hole, direct contact between the outer surface of the piston and the inner wall of the piston hole can be avoided, wear between the outer surface of the piston and the inner wall of the piston hole can be avoided, the coaxiality of the piston cylinder and the piston can be better guaranteed, the piston movement is stable, and then the plunger movement is stable, and the plunger always moves along the axial direction.

[0017] According to some embodiments of the utility model, the crankcase and the pump body are provided with a guide plate, the guide plate is provided with a guide hole corresponding to the position of the plunger, and the plunger is slidingly arranged in the guide hole.

[0018] According to some embodiments of the utility model, the crankcase is provided with a first positioning groove on the side close to the guide plate, the mounting hole is arranged on the bottom wall of the first positioning groove, the guide plate is provided with a second positioning groove on the side close to the crankcase, the guide hole is arranged on the bottom wall of the second positioning groove, the piston cylinder is provided with an annular protrusion in the circumferential direction on the end close to the guide plate, part of the annular protrusion is clamped into the first positioning groove, part of the piston cylinder on the side close to the guide plate is exposed from the crankcase, and the part of the piston cylinder exposed from the crankcase is clamped into the second positioning groove.

[0019] According to some embodiments of the utility model, the third positioning groove is arranged on the side of the guide plate close to the pump body, the guide hole is arranged on the bottom wall of the third positioning groove, the fourth positioning groove is arranged on the side of the pump body close to the guide plate, the first sealing groove is arranged on the bottom wall of the fourth positioning groove, the plunger cavity is communicated with the first sealing groove, and the first sealing ring is installed in the first sealing groove.

[0020] The positioning block is arranged between the guide plate and the pump body, one end of the positioning block extends into the third positioning groove, the other end of the positioning block extends into the fourth positioning groove, and the positioning block abuts against the first sealing ring.

[0021] According to some embodiments of the utility model, the second sealing groove is arranged on the bottom wall of the second positioning groove, the guide hole is arranged on the bottom wall of the second sealing groove, the second sealing ring is arranged in the second sealing groove, the inner ring of the second sealing ring abuts against the plunger, and the first blocking ring is arranged on one side of the second positioning groove and used for limiting the second sealing ring in the second sealing groove.

[0022] The third sealing groove is arranged on the bottom wall of the third positioning groove, the guide hole is arranged on the bottom wall of the third sealing groove, the third sealing ring is arranged in the third positioning groove, the inner ring of the third sealing ring abuts against the plunger, and the positioning block abuts against the third sealing ring.

[0023] According to some embodiments of the utility model, the first exhaust hole is arranged on the side wall of the third positioning groove and communicated to the outside of the guide plate, and the second exhaust hole is arranged on the inner wall of the guide hole and communicated to the outside of the guide plate.

[0024] According to some embodiments of the utility model, the fifth positioning groove is arranged on the side of the guide plate close to the pump body, the fifth positioning groove is arranged at intervals with the third positioning groove, the sixth positioning groove is arranged on the side of the pump body close to the guide plate and corresponding to the position of the fifth positioning groove, the positioning pin is arranged between the guide plate and the pump body, and the two ends of the positioning pin extend into the fifth positioning groove and the sixth positioning groove respectively.

[0025] According to some embodiments of the utility model, the annular groove is arranged on the surface of the piston cylinder, the pin hole is arranged on the crankcase and communicated with the annular groove, the pin shaft is arranged in the pin hole, and one end of the pin shaft is inserted into the annular groove.

[0026] According to some embodiments of the present invention, a notch is provided circumferentially at one end of the piston near the pump body, a fourth sealing ring is provided in the notch, the outer ring of the fourth sealing ring abuts against the inner wall of the piston hole, and a second retaining ring is provided on the side of the notch near the pump body, the second retaining ring being used to restrict the fourth sealing ring within the notch.

[0027] According to some embodiments of the present invention, a connecting protrusion is provided at one end of the piston near the plunger, the outer surface of the connecting protrusion is provided with an external thread, and a connecting groove is provided at one end of the connecting protrusion near the pump body, the inner diameter of the connecting groove gradually decreasing along the depth direction.

[0028] A jacket and a locking nut are provided at the connection between the piston and the plunger. The jacket has a clamping through hole in the middle and tapered ends. The jacket is fitted onto the plunger. One end of the jacket has multiple first slots along the axial direction, and the other end of the jacket has multiple second slots along the axial direction. The multiple first slots and multiple second slots are staggered. The locking nut is threadedly connected to the connecting protrusion and abuts against the jacket. The jacket abuts against the inner wall of the connecting groove and the plunger.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0031] Figure 1 This is a schematic diagram of the structure of a high-precision homogenizer plunger pump according to an embodiment of the present invention;

[0032] Figure 2 This is a cross-sectional view of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0033] Figure 3 This is a cross-sectional view of the crankcase of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0034] Figure 4 This is a cross-sectional view of the guide plate of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0035] Figure 5 This is a cross-sectional view of the pump head of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of the piston cylinder of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0037] Figure 7 This is a schematic diagram of the piston structure of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0038] Figure 8 This is a schematic diagram of the jacket structure of a high-precision homogenizer plunger pump according to an embodiment of the present invention.

[0039] Icon labels:

[0040] 100. Pump body; 110. Plunger cavity; 111. Plunger bore; 120. Fourth positioning groove; 130. First sealing groove; 131. First sealing ring; 140. Sixth positioning groove;

[0041] 200. Plunger;

[0042] 300, crankcase; 310, mounting hole; 320, first positioning groove; 330, pin hole; 331, pin;

[0043] 400, Piston cylinder; 410, Piston bore; 420, Annular protrusion; 430, Annular groove;

[0044] 500, Piston; 510, Limiting groove; 511, Guide ring; 520, Notch groove; 521, Fourth sealing ring; 522, Second retaining ring; 530, Connecting protrusion; 531, Connecting groove; 540, Jacket; 541, Clamping through hole; 542, First gap; 543, Second gap; 550, Locking nut;

[0045] 600, connecting rod; 700, crankshaft;

[0046] 800, Guide plate; 810, Guide hole; 811, Second vent hole; 820, Second positioning groove; 821, Second sealing groove; 822, Second sealing ring; 823, First retaining ring; 830, Third positioning groove; 831, Third sealing groove; 832, Third sealing ring; 833, Positioning block; 834, First vent hole; 840, Fifth positioning groove; 841, Positioning pin. Detailed Implementation

[0047] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0048] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0050] Please see Figure 1 , Figure 2 and Figure 3 The high-precision homogenizer plunger 200 pump of this utility model embodiment includes a pump body 100, a plunger 200, a crankcase 300, a piston cylinder 400, a piston 500, a guide ring 511, a connecting rod 600, and a crankshaft 700. The pump body 100 has a plunger cavity 110 with one open end, and a plunger hole 111 is provided on the bottom wall of the plunger cavity 110. A first sealing ring 131 is installed at the open end of the plunger cavity 110, and one end of the plunger 200 passes through the first sealing ring 131 and extends into the plunger cavity 110, with the first sealing ring 131 abutting against the plunger 200. The crankcase 300 is connected to the pump body 100, and a mounting hole 310 is provided on the crankcase 300, which is aligned with the axis of the plunger cavity 110. The piston cylinder 400 is installed in the mounting hole 310, and a piston hole 410 is provided along the axial direction. The piston 500 is slidably connected in the piston hole 410, and the piston 500 is connected to the other end of the plunger 200. A limit groove 510 is provided circumferentially on the outer surface of the piston 500. A guide ring 511 is installed in the limit groove 510, and the outer ring of the guide ring 511 abuts against the inner wall of the piston hole 410. The connecting rod 600 is movably connected to the piston 500, and the crankshaft 700 is movably connected to the connecting rod 600. The crankshaft 700 is rotatably mounted on the crankcase 300.

[0051] The crankshaft 700 rotates, driving the connecting rod 600 to move, which in turn drives the piston 500 to move back and forth within the piston cylinder 400, causing the plunger 200 to move back and forth within the plunger cavity 110. This causes air to be discharged or drawn in through the plunger hole 111, thus enabling the plunger 200 to pump air in and out. A mounting hole 310 is provided on the crankcase 300, and the piston cylinder 400 is installed within the mounting hole 310. The piston 500 is slidably connected within the piston cylinder 400. A limiting groove 510 is provided on the piston 500 to limit... A guide ring 511 is installed in the slot 510. The guide ring 511 contacts the inner wall of the piston hole 410, which can prevent the outer surface of the piston 500 from directly contacting the inner wall of the piston hole 410, thus avoiding wear between the outer surface of the piston 500 and the inner wall of the piston hole 410. This can better ensure the coaxiality of the piston cylinder 400 and the piston 500, ensure the smooth movement of the piston 500, and thus ensure the smooth movement of the plunger 200, ensuring that the plunger 200 always moves along its axial direction.

[0052] In some embodiments, see Figure 1 , Figure 2 , Figure 3 and Figure 4 A guide plate 800 is provided between the crankcase 300 and the pump body 100. The guide plate 800 is provided with a guide hole 810, which is positioned corresponding to the plunger 200. The plunger 200 slides through the guide hole 810. By providing the guide hole 810, the plunger 200 can be guided, ensuring the coaxiality of the plunger 200 and the plunger cavity 110, and ensuring that the plunger 200 always moves along its axial direction.

[0053] In some embodiments, see Figure 2 , Figure 3 , Figure 4 and Figure 6 A first positioning groove 320 is provided on the side of the crankcase 300 near the guide plate 800, and a mounting hole 310 is provided on the bottom wall of the first positioning groove 320. A second positioning groove 820 is provided on the side of the guide plate 800 near the crankcase 300, and a guide hole 810 is provided on the bottom wall of the second positioning groove 820. An annular protrusion 420 is provided circumferentially on the end of the piston cylinder 400 near the guide plate 800. Part of the annular protrusion 420 is engaged in the first positioning groove 320, and a part of the piston cylinder 400 near the guide plate 800 protrudes from the crankcase 300. The part of the piston cylinder 400 protruding from the crankcase 300 is engaged in the second positioning groove 820. The annular protrusion 420 is engaged with the first positioning groove 320 and the second positioning groove 820 at its left and right ends, respectively, so that the piston cylinder 400 can be positioned and installed on the crankcase 300. The piston cylinder 400 can also position the guide plate 800, which can ensure the coaxiality of the guide hole 810 and the piston hole 410, and ensure that the plunger 200 always moves along its axial direction.

[0054] In some embodiments, see Figure 2, Figure 4 and Figure 5 A third positioning groove 830 is provided on the side of the guide plate 800 near the pump body 100. A guide hole 810 is provided on the bottom wall of the third positioning groove 830. A fourth positioning groove 120 is provided on the side of the pump body 100 near the guide plate 800. A first sealing groove 130 is provided on the bottom wall of the fourth positioning groove 120. The plunger cavity 110 communicates with the first sealing groove 130. A first sealing ring 131 is installed in the first sealing groove 130. A positioning block 833 is provided between the guide plate 800 and the pump body 100. One end of the positioning block 833 extends into the third positioning groove 830, and the other end extends into the fourth positioning groove 120. The positioning block 833 abuts against the first sealing ring 131. The two ends of the positioning block 833 extend into the third positioning groove 830 and the fourth positioning groove 120 respectively, which can ensure the positioning and installation of the pump body 100 and the guide plate 800, ensure the coaxiality of the guide hole 810 and the plunger cavity 110, and ensure that the plunger 200 always moves along its axial direction.

[0055] In some embodiments, see Figure 2 , Figure 4 and Figure 5 A second sealing groove 821 is provided on the bottom wall of the second positioning groove 820, and a guide hole 810 is provided on the bottom wall of the second sealing groove 821. A second sealing ring 822 is provided inside the second sealing groove 821, and the inner ring of the second sealing ring 822 abuts against the plunger 200. A first retaining ring 823 is provided on one side of the second positioning groove 820, and the first retaining ring 823 is used to restrict the second sealing ring 822 within the second sealing groove 821. A third sealing groove 831 is provided on the bottom wall of the third positioning groove 830, and a guide hole 810 is provided on the bottom wall of the third sealing groove 831. A third sealing ring 832 is provided inside the third positioning groove 830, and the inner ring of the third sealing ring 832 abuts against the plunger 200. A positioning block 833 abuts against the third sealing ring 832. A second sealing ring 822 and a third sealing ring 832 are provided at both ends of the guide hole 810, which can better isolate the pump body 100 from the crankcase 300 and prevent cross-contamination between the oil in the crankcase 300 and the material to be homogenized in the pump body 100 when the first sealing ring 131 leaks.

[0056] In some embodiments, see Figure 2 , Figure 4 and Figure 5The third positioning groove 830 has a first vent 834 on its side wall, which connects to the outside of the guide plate 800. The guide hole 810 has a second vent 811 on its inner wall, which also connects to the outside of the guide plate 800. The first vent 834 ensures stable pressure within the first sealing ring 131 and the second sealing ring 822. It also allows leakage of the material to be processed from the pump body 100 in case of seal leakage, thus preventing cross-contamination between the oil in the crankcase 300 and the material to be homogenized in the pump body 100. Similarly, the second vent 811 ensures stable pressure within the guide hole 810 and allows leakage of the oil in the crankcase 300 in case of seal leakage, further preventing cross-contamination between the oil in the crankcase 300 and the material to be homogenized in the pump body 100.

[0057] In some embodiments, see Figure 2 , Figure 4 and Figure 5 A fifth positioning groove 840 is provided on the side of the guide plate 800 near the pump body 100, and the fifth positioning groove 840 is spaced apart from the third positioning groove 830. A sixth positioning groove 140 is provided on the side of the pump body 100 near the guide plate 800, corresponding to the position of the fifth positioning groove 840. A positioning pin 841 is provided between the guide plate 800 and the pump body 100, with both ends of the positioning pin 841 extending into the fifth positioning groove 840 and the sixth positioning groove 140, respectively. The positioning pin 841, in conjunction with the positioning pressure block 833, can better ensure the positioning and installation between the guide plate 800 and the pump body 100.

[0058] In some embodiments, see Figure 2 , Figure 3 and Figure 6 The piston cylinder 400 has an annular groove 430 on its surface, and the crankcase 300 has a pin hole 330 that connects to the annular groove 430. A pin 331 is installed inside the pin hole 330, with one end of the pin 331 inserted into the annular groove 430. The piston cylinder 400 is fixed in the mounting hole 310 by the pin 331, restricting the movement of the piston cylinder 400 along the axial direction and ensuring that the piston 500 can move stably back and forth within the piston cylinder 400.

[0059] In some embodiments, see Figure 2 and Figure 7A notch 520 is provided circumferentially at the end of the piston 500 near the pump body 100. A fourth sealing ring 521 is disposed within the notch 520, with the outer ring of the fourth sealing ring 521 abutting against the inner wall of the piston bore 410. A second retaining ring 522 is provided on the side of the notch 520 near the pump body 100, which is used to confine the fourth sealing ring 521 within the notch 520. By providing the fourth sealing ring 521, oil in the crankcase 300 can be prevented from flowing into the pump body 100, thus preventing cross-contamination between the oil in the crankcase 300 and the material to be homogenized in the pump body 100. The second retaining ring 522 is connected to the piston 500 by screws, making it easy to install and remove, as is the fourth sealing ring 521.

[0060] In some embodiments, see Figure 2 , Figure 7 and Figure 8 A connecting protrusion 530 is provided at the end of the piston 500 near the plunger 200. The outer surface of the connecting protrusion 530 is provided with external threads. A connecting groove 531 is provided at the end of the connecting protrusion 530 near the pump body 100. The inner diameter of the connecting groove 531 gradually decreases along the depth direction. A jacket 540 and a locking nut 550 are provided at the connection between the piston 500 and the plunger 200. A clamping through hole 541 is provided in the middle of the jacket 540. The two ends of the jacket 540 are tapered. The jacket 540 is fitted onto the plunger 200. One end of the jacket 540 has multiple first slots 542 along the axial direction, and the other end of the jacket 540 has multiple second slots 543 along the axial direction. The multiple first slots 542 and multiple second slots 543 are staggered. The locking nut 550 is threadedly connected to the connecting protrusion 530. The locking nut 550 abuts against the jacket 540, and the jacket 540 abuts against the inner wall of the connecting groove 531 and the plunger 200. When the locking nut 550 is tightened, the jacket 540 retracts under the constraint of the connecting groove 531, and the jacket 540 clamps the plunger 200. The jacket 540 is a double-ended spring collet with a long clamping stroke, which can ensure the coaxiality of the plunger 200 and the piston 500.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A high-precision homogenizer plunger pump, characterized in that, include: The pump body has a plunger cavity with one end open, and a plunger hole is provided on the bottom wall of the plunger cavity; The first sealing ring is installed at the open end of the plunger cavity; A plunger, one end of which passes through the first sealing ring and extends into the plunger cavity, with the first sealing ring abutting against the plunger; A crankcase is connected to the pump body, and the crankcase is provided with a mounting hole that is aligned with the axis of the plunger cavity; A piston cylinder is installed in the mounting hole and has a piston hole along the axial direction; A piston is slidably connected in the piston hole and connected to the other end of the plunger. A limit groove is provided on the outer surface of the piston along the circumferential direction. A guide ring is installed in the limiting groove, with its outer ring abutting against the inner wall of the piston hole; The connecting rod is movably connected to the piston; The crankshaft is movably connected to the connecting rod and is rotatably mounted on the crankcase.

2. The high-precision homogenizer plunger pump according to claim 1, characterized in that, A guide plate is provided between the crankcase and the pump body, and a guide hole is provided on the guide plate corresponding to the position of the plunger, and the plunger slides through the guide hole.

3. The high-precision homogenizer plunger pump according to claim 2, characterized in that, The crankcase has a first positioning groove on the side near the guide plate, and the mounting hole is located on the bottom wall of the first positioning groove. The guide plate has a second positioning groove on the side near the crankcase, and the guide hole is located on the bottom wall of the second positioning groove. The piston cylinder has an annular protrusion along its circumference at the end near the guide plate. Part of the annular protrusion is engaged in the first positioning groove, and the part of the piston cylinder near the guide plate protrudes from the crankcase. The part of the piston cylinder protruding from the crankcase is engaged in the second positioning groove.

4. The high-precision homogenizer plunger pump according to claim 3, characterized in that, The guide plate is provided with a third positioning groove on the side near the pump body, and the guide hole is provided on the bottom wall of the third positioning groove. The pump body is provided with a fourth positioning groove on the side near the guide plate, and a first sealing groove is provided on the bottom wall of the fourth positioning groove. The plunger cavity is connected to the first sealing groove, and the first sealing ring is installed in the first sealing groove. A positioning block is provided between the guide plate and the pump body. One end of the positioning block extends into the third positioning groove, and the other end extends into the fourth positioning groove. The positioning block abuts against the first sealing ring.

5. The high-precision homogenizer plunger pump according to claim 4, characterized in that, A second sealing groove is provided on the bottom wall of the second positioning groove, the guide hole is provided on the bottom wall of the second sealing groove, a second sealing ring is provided in the second sealing groove, the inner ring of the second sealing ring abuts against the plunger, and a first retaining ring is provided on one side of the second positioning groove, the first retaining ring is used to restrict the second sealing ring in the second sealing groove; A third sealing groove is provided on the bottom wall of the third positioning groove, the guide hole is provided on the bottom wall of the third sealing groove, a third sealing ring is provided in the third positioning groove, the inner ring of the third sealing ring abuts against the plunger, and the positioning block abuts against the third sealing ring.

6. The high-precision homogenizer plunger pump according to claim 4, characterized in that, The third positioning groove has a first vent hole on its side wall that connects to the outside of the guide plate, and the guide hole has a second vent hole on its inner wall that connects to the outside of the guide plate.

7. The high-precision homogenizer plunger pump according to claim 4, characterized in that, The guide plate is provided with a fifth positioning groove on the side near the pump body. The fifth positioning groove is spaced apart from the third positioning groove. The pump body is provided with a sixth positioning groove on the side near the guide plate, corresponding to the position of the fifth positioning groove. A positioning pin is provided between the guide plate and the pump body, with both ends of the positioning pin extending into the fifth positioning groove and the sixth positioning groove, respectively.

8. The high-precision homogenizer plunger pump according to claim 1, characterized in that, The piston cylinder surface is provided with an annular groove, the crankcase is provided with a pin hole, the pin hole communicates with the annular groove, a pin is provided in the pin hole, and one end of the pin is inserted into the annular groove.

9. The high-precision homogenizer plunger pump according to claim 1, characterized in that, The piston has a notch groove along its circumference at one end near the pump body. A fourth sealing ring is provided in the notch groove, and the outer ring of the fourth sealing ring abuts against the inner wall of the piston hole. A second retaining ring is provided on the side of the notch groove near the pump body, and the second retaining ring is used to restrict the fourth sealing ring in the notch groove.

10. The high-precision homogenizer plunger pump according to claim 1, characterized in that, The piston has a connecting protrusion near the plunger end, the outer surface of the connecting protrusion has an external thread, and the connecting protrusion has a connecting groove near the pump body end, the inner diameter of the connecting groove gradually decreases along the depth direction. A jacket and a locking nut are provided at the connection between the piston and the plunger. The jacket has a clamping through hole in the middle and tapered ends. The jacket is fitted onto the plunger. One end of the jacket has multiple first slots along the axial direction, and the other end of the jacket has multiple second slots along the axial direction. The multiple first slots and multiple second slots are staggered. The locking nut is threadedly connected to the connecting protrusion and abuts against the jacket. The jacket abuts against the inner wall of the connecting groove and the plunger.

Images