Piston assembly for homogenizer

Abstract

The utility model discloses a piston assembly for a homogenizer, which comprises a shell, a piston rod and a piston rod, a first channel; a second channel; the piston assembly is located in the second channel; the piston assembly comprises a piston head and a piston rod which are arranged in the second channel in a sliding mode, an annular groove is formed in the circumferential side face of the piston head, a sealing ring is arranged on the annular groove, part of the sealing ring is located in the annular groove, and a driving piece used for pushing the sealing ring to abut against the inner wall of the second channel is arranged in the piston head. Liquid flowing through the first channel is squeezed through reciprocating motion of the piston head arranged in the second channel in a sliding mode and the piston rod, when the piston rod drives the piston head to move towards the first channel, the driving piece in the piston head can push the sealing ring to be tightly connected with the inner wall of the second channel in an abutting mode, and therefore effective sealing is formed. When the piston head moves in the direction away from the first channel, the driving piece does not push the sealing ring to abut against the inner wall of the second channel.

Description

TECHNICAL FIELD

[0001] The utility model relates to homogenizer technical field, concretely relates to a piston assembly for homogenizer. BACKGROUND

[0002] In the preparation technology of granular material, the homogenizer is a very important equipment, and one of its core components is a piston assembly. The piston assembly plays a key role in the working process of the homogenizer, and is responsible for uniformly mixing and pressing the raw materials.

[0003] In the prior art, the piston assembly is widely used in homogenizers or other high-pressure equipment, wherein the peripheral side surface of the piston is usually sealed by a rubber ring. However, this design has the following problems: when the piston moves upward, the pressure in the chamber can be lower than the atmospheric pressure outside, resulting in negative pressure inside the chamber, and the piston resets slowly; in addition, due to the frequent use of the rubber ring, unnecessary wear and tear of the rubber ring also occurs during the movement of the piston, which gradually reduces the sealing performance and shortens the service life of the rubber ring, thereby reducing the operating efficiency and reliability of the equipment. SUMMARY

[0004] In order to solve at least one technical problem mentioned in the background art, the purpose of the utility model is to provide a piston assembly for a homogenizer, which facilitates the movement of the piston head and reduces the wear and tear of the sealing ring, thereby prolonging the service life of the sealing ring

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a piston assembly for a homogenizer, comprising, a housing; a first channel provided in the housing for the flow of liquid;

[0006] A second channel is provided in the housing, and the second channel is located on the peripheral side of the first channel, and the second channel is in communication with the first channel;

[0007] A piston assembly is located in the second channel and is used to press the liquid flowing in the first channel;

[0008] Wherein, the piston assembly comprises a piston head and a piston rod slidingly arranged in the second channel, an annular groove is provided on the peripheral side surface of the piston head, a sealing ring is arranged on the annular groove, part of the sealing ring is located in the annular groove, and a driving member is arranged in the piston head for pushing the sealing ring against the inner wall of the second channel.

[0009] Further, the driving member comprises a plurality of arc-shaped plates in contact with the sealing ring, the arc-shaped plates are located in the annular groove, the arc-shaped plates are uniformly distributed around the piston head axis, and a pushing member is arranged in the piston head for moving the arc-shaped plates along the radial direction of the piston head.

[0010] Further, the pushing piece comprises a pushing rod sliding along the piston head in a radial direction, the pushing rod is fixedly connected with the arc-shaped plate, a through hole for the movement of the pushing rod is arranged in the piston head, an inserting rod moving along the piston rod in an axial direction is arranged in the piston head, a tapered top is arranged on the side of the inserting rod close to the pushing rod, a hollow groove for the movement of the tapered top is arranged on the inner wall of the piston head, the tapered top is in contact with the pushing rod, and a driving part for driving the pushing rod to move along the piston rod in an axial direction is arranged on the piston rod.

[0011] Further, the tapered top comprises a first column head, a second column head and a third column head, the third column head is located between the first column head and the second column head, the third column head is a circular truncated cone, and the first column head and the second column head are cylindrical.

[0012] Further, the first column head is fixedly connected with the inserting rod, and the diameter of the first column head is larger than that of the second column head.

[0013] Further, the driving part comprises an electromagnet fixedly installed on the piston rod, a magnetic block is fixedly installed on the side of the inserting rod away from the tapered top, a spring is fixedly installed on the side of the tapered top away from the inserting rod, the spring is fixedly connected with the inner wall of the hollow groove, and an electricity connector is further arranged, when the piston head moves towards the first channel, the electricity connector is electrified, the electromagnet is electrified, and the opposite poles of the electromagnet and the magnetic block are the same.

[0014] Further, the electricity connector comprises a power-assisted lever, a clamping head is fixedly installed on the side of the power-assisted lever close to the piston rod, a first slot for the sliding of the power-assisted lever and a second slot for the sliding of the clamping head are arranged on the side of the piston rod away from the piston head, the diameter of the first slot is smaller than the outer diameter of the clamping head, an electricity connection button is fixedly installed on the side of the clamping head close to the electromagnet, and when the piston head moves towards the first channel, the electricity connection button is in contact with the electromagnet to be electrified.

[0015] Further, the shell comprises a first shell and a second shell, the first shell and the second shell are fixed by bolts, and the first channel is composed of the first shell and the second shell.

[0016] Compared with the prior art, the piston head and the piston rod reciprocate to press the liquid flowing in the first channel, when the piston rod drives the piston head to move towards the first channel, the driving part in the piston head pushes the sealing ring to tightly abut against the inner wall of the second channel, so that effective sealing is formed, the fluid is ensured to flow smoothly in the channel without leakage, the design ensures the sealing performance of the piston assembly during the working process, effectively prevents medium leakage, when the piston head moves away from the first channel, the driving part does not push the sealing ring to abut against the inner wall of the second channel, so that when the piston head resets, the pressure in the second channel is reduced, the movement of the piston head is facilitated, and the abrasion of the sealing ring is reduced, and the service life of the sealing ring is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a whole structure schematic view of the utility model;

[0018] Fig. 2 It is a piston assembly structure sectional view of the utility model;

[0019] Fig. 3 It is a piston head sectional view of the utility model.

[0020] In the drawing: 1, shell; 11, first outer shell; 12, second outer shell; 2, first channel; 3, second channel; 4, piston assembly; 41, piston head; 42, piston rod; 43, annular groove; 44, sealing ring; 5, driving part; 51, arc plate; 6, pushing piece; 61, push rod; 62, through hole; 63, insertion rod; 64, conical top head; 641, first stud; 642, second stud; 643, third stud; 65, empty slot; 7, driving part; 71, electromagnet; 72, magnetic block; 73, spring; 8, power connector; 81, booster rod; 82, chuck; 83, first notch; 84, second notch; 85, power connection button. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figs. 1-3The embodiment provides a piston assembly for a homogenizer, which is characterized by comprising a shell 1, a first channel 2 arranged in the shell 1 and used for the flow of liquid, a second channel 3 arranged in the shell 1, the second channel 3 being located on the side of the first channel 2 and being in communication with the first channel 2, and a piston assembly 4 located in the second channel 3 and used for squeezing the liquid flowing through the first channel 2.

[0023] The piston assembly 4 comprises a piston head 41 and a piston rod 42 which are slidably arranged in the second channel 3, the piston head 41 is provided with an annular groove 43 on the side surface thereof, a sealing ring 44 is arranged on the annular groove 43, part of the sealing ring 44 is located in the annular groove 43, and a driving member 5 is arranged in the piston head 41 and used for pushing the sealing ring 44 to abut against the inner wall of the second channel 3.

[0024] The piston head 41 and the piston rod 42 are reciprocated in the second channel 3, so that the liquid flowing through the first channel 2 is squeezed, when the piston rod 42 drives the piston head 41 to move towards the first channel 2, the driving member 5 in the piston head 41 pushes the sealing ring 44 to abut against the inner wall of the second channel 3, so that effective sealing is formed, the flow of the fluid in the channel is ensured, and the fluid is prevented from leaking, when the piston head 41 moves away from the first channel 2, the driving member 5 does not push the sealing ring 44 to abut against the inner wall of the second channel 3, so that, when the piston head 41 is reset, the pressure in the second channel 3 is reduced, the movement of the piston head 41 is facilitated, the abrasion of the sealing ring 44 is reduced, and the service life of the sealing ring 44 is prolonged.

[0025] The driving member 5 comprises a plurality of arc-shaped plates 51 which are in contact with the sealing ring 44, the arc-shaped plates 51 are located in the annular groove 43 and are uniformly distributed around the axis of the piston head 41, and the piston head 41 is provided with a pushing member 6 which is used for driving the arc-shaped plates 51 to move along the radial direction of the piston head 41.

[0026] The plurality of arc-shaped plates 51 which are uniformly distributed around the axis of the piston head 41 are in contact with the sealing ring 44 in the annular groove 43, so that the timing of the contact between the sealing ring 44 and the inner wall of the second channel 3 is controlled, the pushing member 6 arranged in the piston head 41 drives the arc-shaped plates 51 to move along the radial direction of the piston head 41, so that the sealing ring 44 is effectively pushed and expanded, the sealing ring 44 is in contact with the inner wall of the second channel 3, the sealing ring 44 is made of rubber material, so that the elastic force is accumulated when the sealing ring 44 is expanded, when the pushing member 6 no longer pushes the arc-shaped plates 51, the arc-shaped plates 51 lose the pushing force on the sealing ring 44, the sealing ring 44 is contracted under the elastic potential energy of the sealing ring 44, and the sealing ring 44 is no longer in contact with the inner wall of the second channel 3.

[0027] The pushing piece 6 comprises a pushing rod 61 sliding along the piston head 41 in a radial direction, the pushing rod 61 is fixedly connected with the arc-shaped plate 51, a through hole 62 for the movement of the pushing rod 61 is arranged in the piston head 41, an inserting rod 63 moving along the piston rod 42 in an axial direction is arranged in the piston head 41, a tapered head 64 is arranged on the side of the inserting rod 63 close to the pushing rod 61, the tapered head 64 is in contact with the pushing rod 61, and a driving part 7 for driving the pushing rod 61 to move along the piston rod 42 in an axial direction is arranged on the piston rod 42.

[0028] The pushing rod 61 is made to slide along the piston head 41 in a radial direction through the through hole 62 arranged in the piston head 41, and the pushing rod 61 and the fixedly connected arc-shaped plate 51 work cooperatively to expand the sealing ring 44. Specifically, the driving part 7 on the piston rod 42 drives the pushing rod 61 to move along the axial direction of the pushing rod 61, and in this process, the tapered head 64 on the inserting rod 63 is always in contact with the pushing rod 61. Since the outer diameter of the tapered head 64 gradually increases from the piston head 41 to the piston rod 42, when the tapered head 64 moves away from the piston rod 42, the tapered head 64 will push the pushing rod 61 to move along the radial direction of the piston head 41, thereby pushing the arc-shaped plate 51, and further pushing the arc-shaped plate 51 to slide along the radial direction of the piston head 41, to complete the pushing action on the sealing ring 44. When the tapered head moves towards the piston rod 42, the sealing ring 44 is retracted.

[0029] The tapered head 64 comprises a first column head 641, a second column head 642 and a third column head 643, the third column head 643 is located between the first column head 641 and the second column head 642, the third column head 643 is in the shape of a circular truncated cone, the first column head 641 and the second column head 642 are in the shape of a circular cylinder, the first column head 641 is fixedly connected with the inserting rod 63, and the diameter of the first column head 641 is larger than that of the second column head 642.

[0030] The two limit positions reached by the pushing rod 61 when the pushing rod 61 is in contact with the first column head 641 or the second column head 642 are the limit positions of the expansion and retraction of the sealing ring 44, the third column head 643 is in the shape of a circular truncated cone and mainly plays an overrunning role, and the first column head 641 and the second column head 642 are in the shape of a circular cylinder and reduce the abrasion between the inserting rod 63 and the first column head 641 and the second column head 642.

[0031] The driving part 7 comprises an electromagnet 71 fixedly installed on the piston rod 42, a magnetic block 72 is fixedly installed on the side of the inserting rod 63 away from the tapered head 64, a spring 73 is fixedly installed on the side of the tapered head 64 away from the inserting rod 63, the spring 73 is fixedly connected with the inner wall of the hollow groove 65, and the driving part 7 further comprises an electric connector 8. When the piston head 41 moves towards the first channel 2, the electric connector 8 is electrified, the electromagnet 71 is electrified, and the opposite poles of the electromagnet 71 and the magnetic block 72 are the same.

[0032] When the piston head 41 moves to the direction of the first channel 2, the power supply is connected by the power connector 8, the electromagnet 71 starts to be electrified, the magnetic poles of the electromagnet 71 and the magnetic block 72 on the plug rod 63 are opposite and repel each other, so that the magnetic block 72 is driven by the repulsion of the electromagnet 71 to move the conical top head 64 to the direction of the first channel 2 and press the spring 73, at this time, the conical top head 64 pushes the plug rod 63 and the arc-shaped plate 51, and expands the sealing ring 44, when the piston head 41 moves away from the first channel 2, the power supply is disconnected, so that there is no magnetic force between the electromagnet 71 and the magnetic block 72, and the conical top head 64 is reset under the driving of the spring 73, and the rubber ring is contracted.

[0033] The power connector 8 comprises a booster rod 81, a clamping head 82 is fixedly installed on one side of the booster rod 81 close to the piston rod 42, a first slot 83 for sliding of the booster rod 81 and a second slot 84 for sliding of the clamping head 82 are arranged on the other side of the piston rod 42 away from the piston head 41, the first slot 83 has a smaller diameter than the outer diameter of the clamping head 82, and a power connection button 85 is fixedly installed on one side of the clamping head 82 close to the electromagnet 71.

[0034] When the piston head 41 moves to the first channel 2, the external driving source (cylinder or motor) drives the booster rod 81 to move to the direction of the piston head 41, so as to drive the power connection button 85 on the clamping head 82 to contact and electrify the electromagnet 71, with the continuous movement of the booster rod 81, the booster rod 81 pushes the piston rod 42 to move, so as to drive the piston head 41 to move, when it is needed to pull back the piston head 41, the booster rod 81 is reversely moved, the clamping head 82 contacts the inner wall of the second slot 84, and the piston rod 42 is reversely moved under the interaction force of the clamping head 82 and the inner wall of the second slot 84.

[0035] The shell 1 comprises a first shell 11 and a second shell 12, the first shell 11 and the second shell 12 are fixed by bolts, and the first channel 2 is composed of the first shell 11 and the second shell 12.

[0036] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but rather that the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Claims

1. A piston assembly for a homogeniser, characterised in that, The utility model relates to a liquid squeezing device, including, A shell (1); A first channel (2) is arranged in the shell (1) and is used for the flow of liquid; A second channel (3) is arranged in the shell (1), and the second channel (3) is located on the side of the first channel (2), and the second channel (3) is communicated with the first channel (2); A piston assembly (4) is arranged in the second channel (3) and is used for squeezing the liquid flowing in the first channel (2); The piston assembly (4) comprises a piston head (41) and a piston rod (42) which are slidably arranged in the second channel (3), an annular groove (43) is arranged on the side of the piston head (41), a sealing ring (44) is arranged on the annular groove (43), part of the sealing ring (44) is arranged in the annular groove (43), and a driving part (5) is arranged in the piston head (41) and is used for pushing the sealing ring (44) to abut against the inner wall of the second channel (3).

2. The piston assembly for a homogenizer of claim 1, wherein, The driving part (5) comprises a plurality of arc-shaped plates (51) which are in contact with the sealing ring (44), the arc-shaped plates (51) are arranged in the annular groove (43), the arc-shaped plates (51) are uniformly distributed around the axis of the piston head (41), and a pushing part (6) is arranged in the piston head (41) and is used for driving the arc-shaped plates (51) to move along the radial direction of the piston head (41).

3. The piston assembly for a homogenizer of claim 2, wherein, The pushing part (6) comprises a push rod (61) which slides along the radial direction of the piston head (41), the push rod (61) is fixedly connected with the arc-shaped plates (51), a through hole (62) is arranged in the piston head (41) and is used for the movement of the push rod (61), an insertion rod (63) is arranged in the piston head (41) and moves along the axial direction of the piston rod (42), a tapered head (64) is arranged on the side of the insertion rod (63) which is close to the push rod (61), an empty groove (65) is arranged in the inner wall of the piston head (41) and is used for the movement of the tapered head (64), the tapered head (64) is in contact with the push rod (61), and a driving part (7) is arranged on the piston rod (42) and is used for driving the push rod (61) to move along the axial direction of the piston rod (42).

4. The piston assembly for a homogenizer of claim 3, wherein, The tapered head (64) comprises a first column head (641), a second column head (642) and a third column head (643), the third column head (643) is located between the first column head (641) and the second column head (642), the third column head (643) is in the shape of a circular truncated cone, and the first column head (641) and the second column head (642) are in the shape of a circular cylinder.

5. The piston assembly for a homogenizer of claim 4, wherein, The first column head (641) is fixedly connected with the insertion rod (63), and the diameter of the first column head (641) is greater than that of the second column head (642).

6. The piston assembly for a homogenizer of claim 3, wherein, The driving part (7) includes an electromagnet (71) fixedly installed on the piston rod (42), the insertion rod (63) is fixedly installed with a magnetic block (72) on the side away from the conical top head (64), the conical top head (64) is fixedly installed with a spring (73) on the side away from the insertion rod (63), the spring (73) is fixedly connected with the inner wall of the empty slot (65), and the electric connector (8) is further included, when the piston head (41) moves towards the first channel (2), the electric connector (8) is electrified, the electromagnet (71) is electrified, and the electromagnet (71) and the magnetic block (72) have the same magnetic pole on the opposite surface.

7. The piston assembly for a homogenizer of claim 6, wherein, The electric connector (8) includes a power assisting rod (81), the power assisting rod (81) is fixedly installed with a clamping head (82) on the side close to the piston rod (42), the piston rod (42) is provided with a first slot (83) for sliding of the power assisting rod (81) and a second slot (84) for sliding of the clamping head (82) on the side away from the piston head (41), the caliber of the first slot (83) is smaller than the outer diameter of the clamping head (82), the clamping head (82) is fixedly installed with an electric connection button (85) on the side close to the electromagnet (71), when the piston head (41) moves towards the first channel (2), the electric connection button (85) is in contact with the electromagnet (71) to be electrified.

8. The piston assembly for a homogenizer of claim 1, wherein, The shell (1) includes a first shell (11) and a second shell (12), the first shell (11) and the second shell (12) are fixed by bolts, and the first channel (2) is composed of the first shell (11) and the second shell (12).

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