阅读说明：本技术 吸排脂器及废旧油脂收集装置 (Suction grease discharger and waste grease collecting device ) 是由 司艳凯 赵民章 刘章 于 2020-06-15 设计创作，主要内容包括：本发明涉及吸排脂器及废旧油脂收集装置。吸排脂器包括与吸脂动力口相通向吸脂动力腔供传压介质的吸脂动力通道,作用在活塞上的传压介质通过吸脂动力支通道进入吸脂动力腔内；作用在排油单向阀芯上对排油单向阀芯施加作用力使排油单向阀关闭的传压介质通过单向阀作用支通道进入单向阀动力腔内；吸脂动力支通道内或者活塞腔内设有阻力结构,阻力结构使传压介质流向吸脂动力腔的阻力大于流向单向阀动力腔的阻力。通过阻力结构引导传压介质先流向单向阀动力腔,使排油单向阀在柱塞泵吸脂前先关闭,解决了目前的吸排脂器的排油口处仅依靠弹簧的作用关闭单向阀存在排油口关闭延迟较长造成的废旧油脂吸出效率低的技术问题。(The invention relates to a suction grease discharger and a waste grease collecting device. The fat sucking and discharging device comprises a fat sucking power channel which is communicated with the fat sucking power port and supplies pressure transfer medium to the fat sucking power cavity, and the pressure transfer medium acting on the piston enters the fat sucking power cavity through the fat sucking power branch channel; the pressure transmission medium which acts on the oil discharge one-way valve core and applies acting force to the oil discharge one-way valve core to enable the oil discharge one-way valve to be closed enters the one-way valve power cavity through the one-way valve acting branch channel; and a resistance structure is arranged in the grease suction power branch channel or the piston cavity, and the resistance structure enables the resistance of the pressure transmission medium flowing to the grease suction power cavity to be larger than the resistance flowing to the one-way valve power cavity. The resistance structure guides the pressure transfer medium to flow to the power cavity of the one-way valve firstly, so that the oil discharge one-way valve is closed before the plunger pump sucks grease, and the technical problem of low waste grease suction efficiency caused by long oil discharge port closing delay due to the fact that the oil discharge port of the existing grease suction and discharge device is closed only by the action of the spring is solved.)

1. Liposuction ware includes:

a shell, the shell is provided with a plunger cavity and a piston cavity, the wall of the plunger cavity is provided with a grease suction port and a grease discharge port, the wall of the piston cavity is provided with a grease suction power port and a grease discharge power port,

the plunger is movably inserted into the plunger cavity, sucks waste grease into the plunger cavity through reciprocating motion, and discharges the sucked waste grease through the grease discharge port of the plunger cavity;

the piston is movably and hermetically assembled in the piston cavity, the piston cavity comprises a grease suction power cavity and a grease discharge power cavity which are positioned at two sides of the piston, a grease suction power port is communicated with the grease suction power cavity, and a grease discharge power port is communicated with the grease discharge power cavity;

the oil suction and grease discharge device is characterized by comprising an oil discharge one-way valve, wherein the oil discharge one-way valve comprises a one-way valve power cavity, a one-way valve oil discharge cavity and an oil discharge one-way valve core, and the oil discharge one-way valve core separates the one-way valve power cavity from the one-way valve oil discharge cavity;

the oil discharge cavity of the one-way valve is communicated with the grease discharge port of the plunger cavity, and the wall of the oil discharge cavity of the one-way valve is provided with the grease discharge port of the one-way valve which is communicated with the grease discharge port of the plunger cavity to discharge waste grease when the oil discharge one-way valve is opened;

the fat suction and discharge device comprises a fat suction power channel communicated with a fat suction power port and used for supplying pressure transfer medium to a fat suction power cavity, and the fat suction power channel is communicated with the one-way valve power cavity and used for injecting the pressure transfer medium into the one-way valve power cavity when the fat suction power channel injects the pressure transfer medium into the fat suction power cavity to drive the oil discharge one-way valve to be closed;

the liposuction power channel comprises a main channel, a liposuction power branch channel communicated with the main channel and a one-way valve action branch channel communicated with the main channel;

the pressure transfer medium which acts on the piston and enables the plunger to move towards the fat suction direction enters the fat suction power cavity through the fat suction power branch channel; the pressure transmission medium which acts on the oil discharge one-way valve core and applies acting force to the oil discharge one-way valve core to enable the oil discharge one-way valve to be closed enters the one-way valve power cavity through the one-way valve acting branch channel;

and a resistance structure is arranged in the liposuction power branch channel or the piston cavity, and the resistance structure enables the resistance of the pressure transfer medium flowing to the liposuction power cavity to be larger than the resistance flowing to the one-way valve power cavity.

2. The liposuction device according to claim 1, wherein the resistance structure is an elastic member disposed in the liposuction power chamber, the elastic member being configured to apply a force to the piston to press the piston against the liposuction power chamber.

3. The liposuction device according to claim 1, wherein the resistance structure is a friction increasing structure arranged on the piston and/or the wall of the piston cavity for increasing the friction force between the piston and the wall of the piston cavity.

4. The liposuction device according to claim 3, wherein the friction increasing structure is a friction ring sleeved on the piston.

5. The liposuction device according to claim 1, wherein a portion of the liposuction power branch passage forms a damping hole, the damping hole forming the resistance structure.

6. The grease suction and discharge device according to claim 1, wherein the resistance structure comprises a back pressure valve core and a back pressure spring arranged in the grease suction power branch passage, a valve port matched with the back pressure valve core is arranged in the grease suction power branch passage, the back pressure valve core closes the valve port under the action of the back pressure spring, and under the pressure of a pressure transfer medium which is injected into the grease suction power cavity in the grease suction power branch passage, the back pressure valve core overcomes the elastic force of the back pressure spring to open the valve port so as to enable the grease suction power branch passage to be communicated.

7. The grease suction and discharge device according to claim 5 or 6, wherein the grease suction and discharge device comprises a medium return branch for discharging the pressure transfer medium in the grease suction power cavity from the grease suction power cavity and bypassing the resistance structure, two ends of the medium return branch are respectively communicated with the main channel and the grease suction power cavity, and a return one-way valve for passing the pressure transfer medium in a one-way manner is arranged on the medium return branch.

8. The suction grease ejector according to any one of claims 1 to 6, wherein the oil discharge one-way valve core is independently controlled by a pressure transfer medium injected into the one-way valve power chamber from the grease suction power passage and is closed under the action of the pressure transfer medium.

9. The grease suction and discharge device according to any one of claims 1 to 6, wherein the oil discharge check valve and the grease suction power passage are integrated on the housing.

10. Waste grease collecting device, comprising a grease suction and discharge device and a waste grease collecting box, characterized in that the grease suction and discharge device is the grease suction and discharge device according to any one of claims 1 to 9.

Technical Field

The invention relates to a suction grease discharger and a waste grease collecting device.

Background

In order to ensure good lubrication of the friction pair, new lubricating grease needs to be periodically filled into the friction pair, old lubricating grease needs to be discharged at the same time, and the old lubricating grease is usually discharged by using a grease suction and discharge device at present. For example, chinese patent with publication number CN203836552U and publication number 2014.09.17 discloses a dual-path controlled grease suction and grease waste recovery device, which includes a housing, a piston and a plunger, wherein the housing has a piston cavity and a plunger cavity that are communicated, the diameter of the piston cavity is larger than that of the plunger cavity, the piston is connected to the plunger, the piston and the plunger are respectively in sliding and sealing fit with the piston cavity and the plunger cavity, oil ports are provided at two ends of the piston cavity, a side wall of the plunger cavity has an oil suction port with one-way oil inlet, an oil discharge port with one-way oil outlet is provided at the right end, the piston moves leftwards to drive the plunger to open the oil suction port, the oil ports at two ends of the piston can move in the piston cavity in a reciprocating manner and drive the plunger to move in a reciprocating manner, the process of reciprocating movement of the plunger is summarized, and grease suction and discharge operations are performed in the plunger cavity. The double-path control grease suction and discharge device can suck out the old grease at the lubrication point of the friction pair, ensure the smooth injection of new lubricating grease and ensure the lubricating effect of the lubrication point of the friction pair.

After the plunger of the grease suction and discharge device moves rightwards to discharge grease, the one-way valve at the grease discharge port is closed only under the action of the spring, the spring is influenced by resistance of the grease and fatigue of the spring at the grease discharge port, the closing delay of the grease discharge port is long, and when the plunger moves leftwards to suck the grease from the oil suction port, a part of the grease at the grease discharge port enters the plunger cavity, so that the pressure difference between the plunger cavity and the outside is small, and the efficiency of sucking the waste grease from a lubricating point is low.

Disclosure of Invention

The invention aims to provide a grease suction and discharge device, which is used for solving the technical problem of low waste grease suction efficiency caused by long oil discharge port closing delay because an oil discharge port of the conventional grease suction and discharge device only closes a one-way valve under the action of a spring;

in addition, the invention also aims to provide a waste grease collecting device using the grease suction and discharge device, which is used for solving the technical problem of low waste grease collecting efficiency caused by low waste grease suction efficiency of the grease suction and discharge device of the conventional waste grease collecting device.

The invention relates to a fat suction and discharge device, which adopts the following technical scheme:

liposuction ware includes:

a shell, the shell is provided with a plunger cavity and a piston cavity, the wall of the plunger cavity is provided with a grease suction port and a grease discharge port, the wall of the piston cavity is provided with a grease suction power port and a grease discharge power port,

the plunger is movably inserted into the plunger cavity, sucks waste grease into the plunger cavity through reciprocating motion, and discharges the sucked waste grease through the grease discharge port of the plunger cavity;

the piston is movably and hermetically assembled in the piston cavity, the piston cavity comprises a grease suction power cavity and a grease discharge power cavity which are positioned at two sides of the piston, a grease suction power port is communicated with the grease suction power cavity, and a grease discharge power port is communicated with the grease discharge power cavity;

the grease suction and discharge device comprises an oil discharge one-way valve, the oil discharge one-way valve comprises a one-way valve power cavity, a one-way valve oil discharge cavity and an oil discharge one-way valve core, and the oil discharge one-way valve core separates the one-way valve power cavity from the one-way valve oil discharge cavity;

the oil discharge cavity of the one-way valve is communicated with the grease discharge port of the plunger cavity, and the wall of the oil discharge cavity of the one-way valve is provided with the grease discharge port of the one-way valve which is communicated with the grease discharge port of the plunger cavity to discharge waste grease when the oil discharge one-way valve is opened;

the fat suction and discharge device comprises a fat suction power channel communicated with a fat suction power port and used for supplying pressure transfer medium to a fat suction power cavity, and the fat suction power channel is communicated with the one-way valve power cavity and used for injecting the pressure transfer medium into the one-way valve power cavity when the fat suction power channel injects the pressure transfer medium into the fat suction power cavity to drive the oil discharge one-way valve to be closed;

the liposuction power channel comprises a main channel, a liposuction power branch channel communicated with the main channel and a one-way valve action branch channel communicated with the main channel;

the pressure transfer medium which acts on the piston and enables the plunger to move towards the fat suction direction enters the fat suction power cavity through the fat suction power branch channel; the pressure transmission medium which acts on the oil discharge one-way valve core and applies acting force to the oil discharge one-way valve core to enable the oil discharge one-way valve to be closed enters the one-way valve power cavity through the one-way valve acting branch channel;

and a resistance structure is arranged in the liposuction power branch channel or the piston cavity, and the resistance structure enables the resistance of the pressure transfer medium flowing to the liposuction power cavity to be larger than the resistance flowing to the one-way valve power cavity.

Has the advantages that: the grease suction and discharge device is provided with the grease suction power channel, the grease suction power branch channel communicated with the main channel and the check valve action branch channel communicated with the main channel, wherein the resistance structure is arranged in the grease suction power branch channel or in the piston cavity, and the pressure transfer medium is guided to flow to the check valve power cavity through the resistance structure firstly, so that the oil discharge check valve is closed before grease suction of the plunger pump, grease in the oil discharge cavity of the check valve is prevented from flowing back to the plunger cavity, and the technical problem of low waste grease suction efficiency caused by long oil discharge port closing delay due to the fact that the check valve is closed only under the action of a spring at the oil discharge port of the existing grease suction and discharge device is solved.

Furthermore, the resistance structure is an elastic part arranged in the grease discharging power cavity, and the elastic part is used for applying acting force to the piston to enable the piston to extrude the grease sucking power cavity. The elastic part does not change the integral structure of the grease suction and discharge device, is convenient to install and has strong applicability.

Further, the resistance structure is a friction increasing structure which is arranged on the piston and/or the wall of the piston cavity and is used for increasing the friction force between the piston and the wall of the piston cavity. The friction force is increased, so that the structure is simple and the stability is good.

Furthermore, the friction increasing structure is a friction ring sleeved on the piston. The friction ring is convenient to install.

Further, a damping hole is formed in the part of the liposuction power branch channel, and the damping hole forms the resistance structure. The damping hole has a simple structure and is convenient to process.

Furthermore, the resistance structure comprises a backpressure valve core and a backpressure spring which are arranged in the grease suction power branch channel, a valve port matched with the backpressure valve core is arranged in the grease suction power branch channel, the backpressure valve core closes the valve port under the action of the backpressure spring, and under the pressure of a pressure transfer medium which is injected into the grease suction power cavity in the grease suction power branch channel, the backpressure valve core overcomes the elasticity of the backpressure spring to open the valve port so as to enable the grease suction power branch channel to be communicated. The backpressure effect of the backpressure valve core is better, and the oil discharge one-way valve is better guaranteed to be closed.

Furthermore, the fat suction and discharge device comprises a medium return branch for pressure transfer medium in the fat suction power cavity to be discharged from the fat suction power cavity and bypass the resistance structure, two ends of the medium return branch are respectively communicated with the main channel and the fat suction power cavity, and a return one-way valve for the pressure transfer channel to pass in one way is arranged on the medium return branch. The influence of a resistance structure is avoided during grease discharging.

Furthermore, the oil discharge one-way valve core is independently controlled by a pressure transfer medium injected into the one-way valve power cavity from the grease suction power channel and is closed under the action of the pressure transfer medium. The oil discharge one-way valve core is controlled by the pressure transmission medium independently, so that the stability is good and the response is fast.

Furthermore, the oil discharge one-way valve and the grease suction power channel are integrated on the shell. Simple structure integrates the degree height.

The technical scheme of the waste grease collecting device comprises the following steps:

the waste grease collecting device comprises a grease pump, a grease sucking and discharging device and a waste grease collecting box;

liposuction ware includes:

a shell, the shell is provided with a plunger cavity and a piston cavity, the wall of the plunger cavity is provided with a grease suction port and a grease discharge port, the wall of the piston cavity is provided with a grease suction power port and a grease discharge power port,

the plunger is movably inserted into the plunger cavity, sucks waste grease into the plunger cavity through reciprocating motion, and discharges the sucked waste grease through the grease discharge port of the plunger cavity;

the piston is movably and hermetically assembled in the piston cavity, the piston cavity comprises a grease suction power cavity and a grease discharge power cavity which are positioned at two sides of the piston, a grease suction power port is communicated with the grease suction power cavity, and a grease discharge power port is communicated with the grease discharge power cavity;

the grease suction and discharge device comprises an oil discharge one-way valve, the oil discharge one-way valve comprises a one-way valve power cavity, a one-way valve oil discharge cavity and an oil discharge one-way valve core, and the oil discharge one-way valve core separates the one-way valve power cavity from the one-way valve oil discharge cavity;

the oil discharge cavity of the one-way valve is communicated with the grease discharge port of the plunger cavity, and the wall of the oil discharge cavity of the one-way valve is provided with the grease discharge port of the one-way valve which is communicated with the grease discharge port of the plunger cavity to discharge waste grease when the oil discharge one-way valve is opened;

the fat suction and discharge device comprises a fat suction power channel communicated with a fat suction power port and used for supplying pressure transfer medium to a fat suction power cavity, and the fat suction power channel is communicated with the one-way valve power cavity and used for injecting the pressure transfer medium into the one-way valve power cavity when the fat suction power channel injects the pressure transfer medium into the fat suction power cavity to drive the oil discharge one-way valve to be closed;

the liposuction power channel comprises a main channel, a liposuction power branch channel communicated with the main channel and a one-way valve action branch channel communicated with the main channel;

the pressure transfer medium which acts on the piston and enables the plunger to move towards the fat suction direction enters the fat suction power cavity through the fat suction power branch channel; the pressure transmission medium which acts on the oil discharge one-way valve core and applies acting force to the oil discharge one-way valve core to enable the oil discharge one-way valve to be closed enters the one-way valve power cavity through the one-way valve acting branch channel;

and a resistance structure is arranged in the liposuction power branch channel or the piston cavity, and the resistance structure enables the resistance of the pressure transfer medium flowing to the liposuction power cavity to be larger than the resistance flowing to the one-way valve power cavity.

Has the advantages that: the grease suction and discharge device is provided with the grease suction power channel, the grease suction power branch channel communicated with the main channel and the check valve action branch channel communicated with the main channel, and the resistance structure is arranged in the grease suction power branch channel or the piston cavity and guides the pressure transfer medium to flow to the check valve power cavity firstly through the resistance structure, so that the oil discharge check valve is closed firstly before grease suction of the plunger pump, grease in the oil discharge cavity of the check valve is prevented from flowing back to the plunger cavity, and the technical problem of low waste grease collection efficiency caused by low waste grease suction efficiency of the grease suction and discharge device of the conventional waste grease collection device is solved. .

Furthermore, the resistance structure is an elastic part arranged in the grease discharging power cavity, and the elastic part is used for applying acting force to the piston to enable the piston to extrude the grease sucking power cavity. The elastic part does not change the integral structure of the grease suction and discharge device, is convenient to install and has strong applicability.

Further, the resistance structure is a friction increasing structure which is arranged on the piston and/or the wall of the piston cavity and is used for increasing the friction force between the piston and the wall of the piston cavity. The friction force is increased, so that the structure is simple and the stability is good.

Furthermore, the friction increasing structure is a friction ring sleeved on the piston. The friction ring is convenient to install.

Further, a damping hole is formed in the part of the liposuction power branch channel, and the damping hole forms the resistance structure. The damping hole has a simple structure and is convenient to process.

Furthermore, the resistance structure comprises a backpressure valve core and a backpressure spring which are arranged in the grease suction power branch channel, a valve port matched with the backpressure valve core is arranged in the grease suction power branch channel, the backpressure valve core closes the valve port under the action of the backpressure spring, and under the pressure of a pressure transfer medium which is injected into the grease suction power cavity in the grease suction power branch channel, the backpressure valve core overcomes the elasticity of the backpressure spring to open the valve port so as to enable the grease suction power branch channel to be communicated. The backpressure effect of the backpressure valve core is better, and the oil discharge one-way valve is better guaranteed to be closed.

Furthermore, the fat suction and discharge device comprises a medium return branch for pressure transfer medium in the fat suction power cavity to be discharged from the fat suction power cavity and bypass the resistance structure, two ends of the medium return branch are respectively communicated with the main channel and the fat suction power cavity, and a return one-way valve for the pressure transfer channel to pass in one way is arranged on the medium return branch. The influence of a resistance structure is avoided during grease discharging.

Furthermore, the oil discharge one-way valve core is independently controlled by a pressure transfer medium injected into the one-way valve power cavity from the grease suction power channel and is closed under the action of the pressure transfer medium. The oil discharge one-way valve core is controlled by the pressure transmission medium independently, so that the stability is good and the response is fast.

Furthermore, the oil discharge one-way valve and the grease suction power channel are integrated on the shell. Simple structure integrates the degree height.

Drawings

FIG. 1 is a schematic view of a fat suction and discharge device according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of a fat suction/discharge device according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of a fat suction/discharge device according to embodiment 2 of the present invention;

FIG. 4 is a schematic structural view of a fat suction/discharge device according to embodiment 2 of the present invention;

FIG. 5 is a schematic view of a fat suction/discharge device according to embodiment 3 of the present invention;

FIG. 6 is a schematic structural view of a fat suction/discharge device according to embodiment 3 of the present invention;

FIG. 7 is a schematic view of a fat suction/discharge device according to embodiment 4 of the present invention;

FIG. 8 is a schematic structural view of a fat suction/discharge device according to embodiment 4 of the present invention;

in the figure: 1-a shell; 11-a piston cavity; 111-liposuction power ports; 112-a grease discharge power port; 113-liposuction power lumen; 114-a grease-discharging power cavity; 12-a plunger cavity; 121-a fat suction port; 122-plunger cavity grease discharge port; 13-a liposuction power channel; 131-a main channel; 132-a liposuction power branch channel; 133-check valve acting branch channel; 14-a grease-removal power channel; 15-one-way valve cavity; 151-one-way valve power chamber; 152-one-way valve oil discharge cavity; 16-oil discharge check valve port; 17-grease drain holes; 18-one-way valve grease outlet; 19-valve port; 20-return medium branch; 2-a piston; 3-a plunger; 4-oil discharge one-way valve core; 5-a back pressure valve core; 6-a back pressure spring; 7-a loop one-way valve core; 8-loop check valve spring; 9-a damping hole; 10-piston action spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are described in further detail below with reference to examples.

The invention relates to a grease suction and discharge device, in particular to embodiment 1:

as shown in fig. 1 and fig. 2, the liposuction and fat removal device comprises a housing 1, the housing 1 has a piston cavity 11, a plunger cavity 12, a liposuction power channel 13 and a fat removal power channel 14, a liposuction power port 111 and a fat removal power port 112 are arranged on the cavity wall of the piston cavity 11, and a liposuction port 121 and a plunger cavity fat removal port 122 are arranged on the cavity wall of the plunger cavity 12.

The piston 2 is assembled in the piston cavity 11 in a sliding sealing mode, the plunger 3 is inserted in the plunger cavity 12 in a sliding sealing mode, the piston 2 is connected with the plunger 3 and used for driving the plunger 3 to move in a reciprocating mode, waste grease is sucked into the plunger cavity 12 through the reciprocating motion of the plunger 3, and the sucked waste grease is discharged through the plunger cavity grease discharging hole 122.

In the embodiment, the grease pump provides power for the grease suction and discharge device, and the pressure transmission medium for driving the grease suction and discharge device is grease.

The piston cavity 11 comprises a grease suction power cavity 113 and a grease discharge power cavity 114 which are positioned at two sides of the piston 2, a grease suction power port 111 is communicated with the grease suction power cavity 113, a grease discharge power port 112 is communicated with the grease discharge power cavity 114, and a grease suction power channel 13 is communicated with the grease suction power port 111 to supply pressure transfer medium to the grease suction power cavity 113. The grease discharging power channel 14 is communicated with the grease discharging power port 112 to supply pressure medium into the grease discharging power cavity 114. In other embodiments, hydraulic oil or emulsion can be injected into the grease discharging power cavity according to actual needs.

The casing 1 is further provided with an oil discharge one-way valve, the oil discharge one-way valve comprises a one-way valve cavity 15 and an oil discharge one-way valve core 4 arranged in the one-way valve cavity 15, in the embodiment, the one-way valve cavity 15 is divided into a one-way valve power cavity 151 and a one-way valve oil discharge cavity 152 by the oil discharge one-way valve core 4, and the oil discharge one-way valve core 4 is assembled in the one-way valve cavity 15 in a sliding and sealing mode. An oil discharge check valve port 16 is arranged on the wall of the check valve power cavity 151, the check valve power cavity 151 is communicated with the plunger cavity oil discharge port 122 through the oil discharge check valve port 16, after the pressure in the plunger cavity 12 is increased, the oil discharge check valve core 4 opens the oil discharge check valve port 16 under the action of the oil pressure in the plunger cavity 12, and the oil in the plunger cavity 12 can enter the check valve oil discharge cavity 152 through the plunger cavity oil discharge port 122 and the oil discharge check valve port 16. Grease discharging holes 17 are formed in the wall of the one-way valve power cavity 151, and waste grease entering the one-way valve power cavity 151 is discharged through the grease discharging holes 17. The opening of the grease discharging hole 17 arranged on the wall of the one-way valve power cavity 151 forms a one-way valve grease discharging port 18.

The one-way valve power cavity 151 is communicated with the grease suction power channel 13, the one-way valve oil discharge cavity 152 is used for being communicated with the plunger cavity grease discharge port 122 and the one-way valve grease discharge port 18, and the oil discharge one-way valve port 16 is arranged on the cavity wall of the one-way valve oil discharge cavity 152, so that the oil discharge one-way valve core 4 separates the grease suction power channel 13 from the one-way valve grease discharge port 18 and separates the grease suction and discharge power channel 14 from the plunger cavity grease discharge port 122.

When the drain check valve is in the open position, the plunger cavity drain port 122 is in communication with the check valve drain port 18. When the drain check valve is in the closed state, the passage between the plunger chamber drain port 122 and the check valve drain port 18 is blocked.

In order to enable quick response of the oil discharge check valve, in the present embodiment, the grease suction power passage 13 includes a main passage 131, a grease suction power branch passage 132 communicating with the main passage 131, and a check valve acting branch passage 133 communicating with the main passage 131. The pressure medium acting on the piston 2 to move the plunger 3 in the grease suction direction enters the grease suction power chamber 113 through the grease suction power branch passage 132, and the pressure medium acting on the oil discharge check valve element 4 to apply an acting force to the oil discharge check valve element 4 to close the oil discharge check valve enters the check valve power chamber 151 through the check valve action branch passage 133.

The grease suction power branch channel 132 is internally provided with a backpressure valve core 5, a backpressure spring 6 and a valve port 19 matched with the backpressure valve core 5, the backpressure valve core 5 closes the valve port 19 under the action of the backpressure spring 6, and under the pressure of a pressure transfer medium injected into the grease suction power cavity in the grease suction power branch channel 132, the backpressure valve core 5 overcomes the elasticity of the backpressure spring 6 to open the valve port 19, so that the grease suction power branch channel 132 is communicated. Under the action of the back pressure spring 6 and the back pressure valve core 5, the resistance of a pressure transfer medium in the grease suction power channel 13 flowing to the grease suction power cavity 113 is greater than the resistance flowing to the one-way valve power cavity 151, the pressure transfer medium firstly enters the one-way valve power cavity 151 to close the oil discharge one-way valve core 4, then the pressure transfer medium enters the grease suction power cavity 113 to enable the piston 2 to drive the plunger 3 to move, the pressure difference between the plunger cavity 12 and the outside is increased, and grease at a lubricating point enters the plunger cavity 12 through the grease suction port 121. The back pressure valve core 5, the back pressure spring 6 and the valve port 19 matched with the back pressure valve core 5 form a back pressure valve, and the back pressure valve forms a resistance structure which enables the resistance of the pressure transmission medium flowing to the grease suction power cavity 113 to be larger than the resistance flowing to the one-way valve power cavity 151.

Because of the resistance structure provided in the liposuction power branch passage 132, when the plunger chamber 12 is discharged out of the grease, in order to quickly discharge the pressure-transferring medium in the grease suction power cavity 113, in this embodiment, the casing 1 is provided with a medium return branch 20, two ends of the medium return branch 20 are respectively communicated with the main channel 131 and the grease suction power cavity 113, the medium return branch 20 is used for discharging the pressure-transferring medium in the grease suction power cavity 113 from the grease suction power cavity 113 and bypassing the medium return branch 20 of the back pressure valve core 5 and the back pressure spring 6, in order to limit the pressure transmission medium from directly entering the grease suction power cavity 113 through the return medium branch 20 when the plunger cavity 12 sucks grease, a return medium branch 20 is provided with a return one-way valve through which the pressure transmission medium passes in one way, the return one-way valve comprises a return one-way valve core 7 and a return one-way valve spring 8, and the return one-way valve spring 8 is used for keeping the return one-way valve core 7 at a position for closing the return medium branch 20.

The working process of the fat suction and discharge device is as follows:

when the plunger cavity 12 sucks grease, a pressure transfer medium is injected into the grease suction power channel 13 through a grease pump, namely, grease is injected, the pressure transfer medium firstly enters the check valve power cavity 151 through the check valve action branch channel 133, so that the oil discharge check valve core 4 closes the oil discharge check valve port 16, then under the action of the pressure transfer medium in the grease suction power channel 13, the backpressure spring 6 is compressed, the valve port 19 is opened by the backpressure valve core 5, the pressure transfer medium enters the grease suction power cavity 113 through the grease suction power branch channel 132, the pressure of the grease suction power cavity 113 is increased, the piston 2 pulls the plunger 3 to move, the pressure difference between the plunger cavity 12 and the outside is increased, and the grease at the lubricating point is sucked into the plunger cavity 12.

After the plunger cavity 12 finishes the liposuction, pressure transmitting medium is injected into the liposuction power cavity 114 through the grease pump, namely grease is injected, the pressure in the liposuction power cavity 114 is increased, the piston 2 pushes the plunger 3 to move, so that the grease in the plunger cavity 12 is discharged outside through the grease discharge port 122 of the plunger cavity, the oil discharge one-way valve core 4 is opened, the waste grease enters the one-way valve oil discharge cavity 152, and then is discharged through the grease discharge hole 17 communicated with the one-way valve oil discharge cavity 152 to enter a waste oil collecting container. And finishing a cycle of grease suction and discharge operation.

The grease suction and discharge device of the present invention according to embodiment 2 differs from the grease suction and discharge device according to embodiment 1 only in that: as shown in fig. 3 and 4, a part of the liposuction power branch passage 132 forms the damping hole 9 which forms the resistance structure.

Embodiment 3 of the fat suction and drainage device of the present invention, the fat suction and drainage device in this embodiment is different from the above-mentioned embodiment 2 of the fat suction and drainage device only in that: as shown in fig. 5 and 6, in the present embodiment, the return medium branch is not provided, and when the plunger chamber 12 discharges oil, the pressure medium in the grease suction power chamber 113 flows back through the orifice 9.

Embodiment 4 of the liposuction device of the present invention, the liposuction device in this embodiment is different from the above-mentioned embodiment 1 of the liposuction device only in that: as shown in fig. 7 and 8, the resistance structure in the present embodiment is a piston-acting spring 10 disposed in the grease discharging power chamber 114, and the piston-acting spring 10 is used to apply a force to the piston 2 that presses the piston 2 against the grease suction power chamber 113. In the embodiment, a medium return branch is not required to be arranged, and the structure of the fat sucking and discharging device is simplified.

Embodiment 5 of the liposuction device of the present invention, the liposuction device in this embodiment is different from the above-mentioned embodiment 1 of the liposuction device only in that: the resistance structure is a friction increasing structure which is arranged on the piston and increases the friction force between the piston and the wall of the cavity of the piston, the friction increasing structure in the embodiment is a friction ring which is sleeved on the piston and made of rubber, and the friction ring is a rubber sealing ring. In other embodiments, the friction ring may also be a guide ring for guiding, and the guide ring is made of plastic. In other embodiments, the friction increasing structure may also be a plating layer disposed on the wall of the piston cavity, and of course, the friction increasing structure may also be disposed on both the piston and the wall of the piston cavity.

Embodiment 6 of the liposuction device of the present invention, the liposuction device in this embodiment is different from the above-mentioned embodiment 1 of the liposuction device only in that: in this embodiment, a check valve power cavity spring is further disposed in the check valve power cavity, and the oil drain check valve core is controlled by the grease injected into the check valve power cavity through the grease suction power channel and the check valve power cavity spring in a shared manner and is closed under the combined action of the grease and the check valve power cavity spring.

The grease suction and discharge device of the present invention according to embodiment 7 differs from the grease suction and discharge device according to embodiment 1 only in that: the oil discharge one-way valve is arranged separately from the shell.

Embodiment 8 of the liposuction device of the present invention, the liposuction device in this embodiment is different from the above-mentioned embodiment 1 of the liposuction device only in that: the shell is connected with a fat absorption power pipe, and a passage in the fat absorption power pipe forms a fat absorption power passage.

Embodiment 9 of the liposuction device of the present invention, the liposuction device in this embodiment is different from embodiment 1 of the liposuction device only in that: in this embodiment, the piston and the plunger are detachably connected in a split manner, and the housing comprises two parts, wherein one part forms the piston cylinder, and the other part forms the plunger cylinder.

According to the specific embodiment of the waste grease collecting device, the waste grease collecting device comprises the grease pump, the grease sucking and discharging device and the waste grease collecting box, and the grease sucking and discharging device is the same as the structure in any specific embodiment of the grease sucking and discharging device, and is not described in detail.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.