Kitchen waste squeezing machine

Abstract

The present invention belongs to the technical field of garbage treatment, and discloses a kitchen waste squeezing and drying machine, which includes a machine shell provided with a feed inlet, a spiral squeezing and drying device arranged inside the machine shell, and a driving device for driving the spiral squeezing and drying device to rotate to push the wet garbage towards the discharge port. It further includes a squeezing and drying device for squeezing the wet garbage at the discharge port, and the acting force of the squeezing and drying device on the wet garbage at the discharge port is parallel to the central axis of the spiral squeezing and drying device. Since the acting force of the squeezing and drying device of the present invention on the wet garbage at the discharge port is parallel to the central axis of the spiral squeezing and drying device, it is convenient to uniformly adjust the acting force on the wet garbage at the discharge port, improve the squeezing efficiency, and further realize the secondary dehydration and drying of the residue output from the discharge port, thereby improving the dehydration rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of garbage treatment, and particularly relates to a kitchen waste squeezing machine. Background Art

[0002] Wet garbage such as kitchen waste has a high water content, large fluidity, and is prone to leakage, which can pollute surface water and groundwater and cause secondary pollution; moreover, a large amount of water in wet garbage is not conducive to the transportation of garbage, and is even less conducive to the incineration treatment of garbage. Therefore, it is necessary to dehydrate and dry wet garbage.

[0003] At present, the existing wet garbage squeezing machines use the physical extrusion method of screw thrust for dehydration, and generally adopt single-axis single-line screws or double-axis single-line screws, and use means such as variable diameter and variable pitch to obtain a certain compression ratio. However, the helix angle of the wire screw is small, the frictional force is large when pushing the material, and the positive thrust is small. Therefore, in order to further improve the dehydration effect of the wet garbage squeezing machine, the means of increasing the back pressure (i.e., reverse pressure) is adopted. The means of increasing the back pressure is usually carried out by the cooperation of a reverse push plate and a spring gland, and the pressure of the spring is adjusted by means of a nut, an oil cylinder or a cylinder. This adjustment method needs to be carried out during shutdown, and it is not convenient to adjust the pressure of the spring at any time. Moreover, because the acting force of the oil cylinder and the cylinder adjustment is not on the axis of the extrusion screw, it is not convenient to adjust the pressure evenly.

[0004] Moreover, even if the existing wet garbage squeezing machines adopt the means of increasing the back pressure to increase the dehydration rate, the moisture content of the basic residue is still relatively high, usually about 60%. Summary of the Invention

[0005] In order to improve the dehydration rate of the wet garbage squeezing machine, the present invention provides a kitchen waste squeezing machine.

[0006] The present invention provides a kitchen waste squeezing machine, which includes a machine shell provided with a feed inlet, a screw squeezing device arranged in the machine shell, and a driving device for driving the screw squeezing device to rotate to push wet garbage towards the discharge port. It also includes a squeezing device for squeezing the wet garbage at the discharge port, and the acting force of the squeezing device on the wet garbage at the discharge port is parallel to the central axis of the screw squeezing device.

[0007] Further, the acting force of the squeezing device on the wet garbage at the discharge port coincides with the central axis of the screw squeezing device.

[0008] Further, the screw squeezing device includes a double-line screw shaft rotatably connected to the driving device and a water filtering shell; the front end of the double-line screw shaft axially passes through the water filtering shell and is connected to the squeezing device.

[0009] Further, the lead L of the double-line screw shaft is greater than the major diameter D of the screw, and the helix angle is 30°-40°.

[0010] Further, the lead L of the double-threaded spiral shaft is twice the major diameter D of the spiral, and the helix angle is 35°.

[0011] Further, wear-resistant protrusions are provided on the surface of the spiral blade of the double-threaded spiral shaft.

[0012] Further, the water filtering shell includes a shell, and a plurality of blocking parts are detachably provided on the inner wall of the shell.

[0013] Further, the blocking parts are strip-shaped, and a plurality of the blocking parts are axially detachably arranged at intervals on the inner wall of the shell.

[0014] Further, the squeezing device includes a reverse pushing member and a reverse squeezing member

[0015] The reverse squeezing member is arranged at the front end of the double-threaded spiral shaft. The reverse pushing member is connected to the water filtering shell and there is a gap between the reverse pushing member and the end face of the water filtering shell, and the gap is the discharge port; the reverse squeezing member is also in contact with the reverse pushing member to apply a force to the reverse pushing member to maintain, expand or reduce the size of the discharge port.

[0016] Further, the reverse pushing member is of a disc-shaped structure, and the reverse pushing member is sleeved on the double-threaded spiral shaft and rotates with the double-threaded spiral shaft.

[0017] Further, a dispersing part is provided on the reverse pushing member; the dispersing part is arranged in the discharge port for dispersing the squeezed wet garbage.

[0018] Further, the reverse squeezing member includes an elastic component and a reverse pushing component; one end of the elastic component is connected to the reverse pushing member, and the other end is connected to the reverse pushing component; the reverse pushing component applies a force to the reverse pushing member by squeezing the elastic component to maintain, expand or reduce the size of the discharge port.

[0019] Further, the elastic component includes an elastic body and an elastic part gland arranged at the end of the elastic body; one end of the elastic body is connected to the reverse pushing member, and the other end is connected to the reverse pushing component through the elastic part gland.

[0020] Further, the elastic part is a spring, and the spring is sleeved on the double-threaded spiral shaft.

[0021] Further, the reverse pushing component is a hollow jack.

[0022] Compared with the prior art, the beneficial effects of the present invention adopting the above scheme are:

[0023] Since the squeezing device of the present invention applies a force to the wet garbage at the discharge port parallel to the central axis of the screw squeezing device, it is convenient to uniformly adjust the force applied to the wet garbage at the discharge port, improve the squeezing efficiency, and thus achieve the secondary dehydration and drying of the residue output from the discharge port, increasing the dehydration rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. 6 is a three-dimensional structural schematic diagram of a kitchen waste squeezing machine provided by an embodiment of the present invention;

[0025] Figure 2 FIG. 7 is a structural schematic diagram of a kitchen waste squeezing machine provided by an embodiment of the present invention under a front view perspective;

[0026] Figure 3 FIG. 8 is a structural schematic diagram of a kitchen waste squeezing machine provided by an embodiment of the present invention under a top view perspective;

[0027] Figure 4 FIG. 9 is a structural schematic diagram of a kitchen waste squeezing machine provided by an embodiment of the present invention under a left view perspective;

[0028] Figure 5 FIG. Figure 4 10 is a sectional structural schematic diagram of the A-A section in FIG.

[0029] Figure 6 FIG. Figure 5 11 is an enlarged structural schematic diagram at C in FIG.

[0030] Figure 7 FIG. 12 is a three-dimensional structural schematic diagram of a double-threaded screw shaft of a kitchen waste squeezing machine provided by an embodiment of the present invention;

[0031] Figure 8 FIG. 13 is a structural schematic diagram of a double-threaded screw shaft of a kitchen waste squeezing machine provided by an embodiment of the present invention under a front view perspective;

[0032] Figure 9 FIG. 14 is a structural schematic diagram of a double-threaded screw shaft of a kitchen waste squeezing machine provided by an embodiment of the present invention under a top view perspective;

[0033] Figure 10 FIG. 15 is a structural schematic diagram of a double-threaded screw shaft of a kitchen waste squeezing machine provided by an embodiment of the present invention under a top view perspective;

[0034] Figure 11 FIG. 16 is a three-dimensional structural schematic diagram of a water filtering shell of a kitchen waste squeezing machine provided by an embodiment of the present invention;

[0035] Figure 12 FIG. 17 is a structural schematic diagram of a water filtering shell of a kitchen waste squeezing machine provided by an embodiment of the present invention under a front view perspective;

[0036] Figure 13 is Figure 12 a schematic structural view of the D-D cross-section in

[0037] Figure 14 a schematic three-dimensional structural view of a reverse pushing assembly of a kitchen waste squeezing machine provided by an embodiment of the present invention;

[0038] Figure 15 a schematic structural view of a reverse pushing assembly of a kitchen waste squeezing machine provided by an embodiment of the present invention under a rear view perspective;

[0039] Figure 16 is Figure 15 a schematic cross-sectional view of the B-B cross-section in

[0040] In the figure: 1. Machine shell; 11. Feeding port; 2. Screw squeezing device; 21. Double-threaded screw shaft; 22. Water filtering shell; 221. Shell body; 222. Blocking part; 3. Driving device; 4. Extrusion device; 41. Reverse pushing part; 42. Reverse extrusion part; 421. Elastic component; 422. Reverse pushing assembly; 4211. Elastic part; 4212. Elastic part pressing cover; 4221. Outer cylinder body; 4222. Inner cylinder body; 4223. Piston; 4224. Piston moving cavity; 5. Waste water tank. Detailed implementation manners

[0041] In order to more clearly understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0042] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the term "front" refers to the advancing direction of wet waste in the machine shell; the orientation or positional relationship indicated by terms such as "left", "right", "up", "down", "axial direction", "radial direction", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The meaning of "a plurality" is two or more, unless otherwise specifically defined.

[0045] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] As Figures 1 - 6 shown, the existing squeezing machine for dehydrating wet garbage includes a machine shell 1 provided with a feed inlet 11, a screw squeezing device 2 arranged inside the machine shell 1, and a driving device 3 for driving the screw squeezing device 2 to rotate to push the wet garbage towards the discharge outlet. When using the above squeezing machine to dehydrate wet garbage, such as kitchen waste, the user starts the driving device 3 and puts the wet garbage into the machine shell 1 from the feed inlet 11. The wet garbage entering the machine shell 1 is on the one hand rubbed against the screw squeezing device 2 under the rotation of the screw squeezing device 2 to generate heat for the first dehydration of the wet garbage, and on the other hand, the wet garbage is pushed towards the discharge outlet at the same time. Finally, the wet garbage that has undergone the first dehydration flows out from the discharge outlet, and the generated wastewater flows into the wastewater tank 5 installed on the machine shell 1.

[0047] In order to prevent the wet garbage from scattering outside when adding it to the machine shell 1, a feed hopper is also installed at the feed inlet 11 of the machine shell 1. Among them, the driving device 3 includes a motor. The output shaft of the motor is connected to the end of the screw squeezing device 2 through a coupling to drive the screw squeezing device 2 to rotate. In addition, in order to reduce the rotation speed of the motor, the motor is preferably a reduction motor.

[0048] However, only by dehydrating the wet garbage in the above-mentioned manner once, the water content of the wet garbage flowing out from the discharge outlet is still relatively high, generally up to about 60%. In order to improve the dehydration rate, this embodiment provides a kitchen waste squeezing machine, which, in addition to including the above-mentioned components, further includes a squeezing device 4 for squeezing the wet garbage at the discharge outlet; the acting force of this squeezing device 4 on the wet garbage at the discharge outlet is parallel to the central axis of the screw squeezing device 2, so as to facilitate uniformly adjusting the acting force on the wet garbage at the discharge outlet, improve the squeezing efficiency, and further realize the second dehydration and drying of the residue output from the discharge outlet, thereby improving the dehydration rate.

[0049] Preferably, the acting force of the squeezing device 4 on the wet garbage at the discharge outlet coincides with the central axis of the screw squeezing device 2.

[0050] As Figures 1 - 6As shown in the figure, the spiral squeezing device 2 includes a double-threaded spiral shaft 21 rotatably connected to a driving device 3 and a water filtering shell 22; the front end of the double-threaded spiral shaft 21 axially penetrates through the water filtering shell 2 and is connected to the squeezing device 4.

[0051] Currently, the existing squeezing machines used for dehydrating wet garbage usually adopt a single-axis single-thread spiral shaft or a double-axis single-thread spiral shaft, and use means such as variable diameter and variable torque to obtain a certain compression ratio to achieve pressurized dehydration and transportation of wet garbage. However, due to the small spiral lead angle of the single-thread spiral shaft, the friction force is large when pushing the material, and the forward thrust is small. In this embodiment, a double-threaded spiral shaft is used to replace the single-thread spiral shaft in the prior art. When using the double-threaded spiral shaft to push wet garbage, the friction force is small, and the conveying speed and forward thrust of the double-threaded spiral shaft on wet garbage are much greater than those of the single-thread spiral shaft, so that the processing capacity of wet garbage per unit time can be improved. In addition, because the resistance of the double-threaded spiral shaft is small, a higher rotational speed can be obtained with the same power, which intensifies the friction force between the double-threaded spiral shaft and the material to generate a higher temperature, which is beneficial to the dehydration and drying of wet garbage and improves the dehydration effect.

[0052] Also, because the front end of the double-threaded spiral shaft 21 axially penetrates through the water filtering shell 22 and is connected to the squeezing device 4, and the squeezing device 4 is used to squeeze the wet garbage at the discharge port 12, the squeezing action of the squeezing device 4 on the wet garbage also plays a certain dehydration role, that is, the wet garbage is dehydrated for the second time, so that the dehydration efficiency of the wet garbage is further improved.

[0053] As Figures 7 - 10 shown in the figure, the lead L of the double-threaded spiral shaft 21 is greater than the major diameter D of the spiral, and the spiral lead angle is 30° - 40°. Preferably, the lead L of the double-threaded spiral shaft 21 is twice the major diameter D of the spiral, and the spiral lead angle is 35°. By limiting the lead and spiral lead angle of the double-threaded spiral shaft 21, the resistance of the double-threaded spiral shaft can be minimized, and a higher rotational speed can be obtained under the same power condition, which intensifies the friction force between the double-threaded spiral shaft and the material to generate a higher temperature, which is beneficial to the dehydration and drying of wet garbage and improves the dehydration effect.

[0054] In order to make up for the insufficient friction force when pushing wet garbage and make the friction force and forward thrust reach a certain balance, in this embodiment, wear-resistant protrusions are also provided on the surface of the spiral blades of the double-threaded spiral shaft 21. Preferably, these wear-resistant protrusions are formed by surfacing wear-resistant materials on the surface of the spiral blades, and these wear-resistant protrusions have a tearing and crushing effect on wet garbage, so that wet garbage does not need to be put in bags and manually sorted.

[0055] The wear-resistant material can be a metal material, such as stainless steel, iron, NM500 wear-resistant steel, etc.

[0056] The "lead" in this embodiment refers to the "thread lead", specifically the axial distance that any point on the thread moves along the same thread in one revolution.

[0057] The "helix angle" in this embodiment is also called the "lead angle" or "thread lead angle". On the middle diameter cylinder or middle diameter cone, it is the angle between the tangent of the helix and the plane perpendicular to the thread axis. In a worm and worm gear drive, the worm lead angle is the angle between the tangent of the helix on the worm pitch cylinder and the worm end face.

[0058] As Figures 11 - 13 shown, the water filter shell 22 includes a shell 221, and a plurality of blocking parts 222 are detachably arranged on the inner wall of the shell 221. The function of the blocking part 222 is to have a certain blocking effect on the wet garbage pushed by the double-threaded spiral shaft, so that the wet garbage forms complex motion states such as tearing, crushing, kneading, squeezing, and wringing dry in the shell 221, achieving the purpose of strong dehydration and further improving the dehydration rate.

[0059] The blocking part 222 is in a long strip shape, and a plurality of blocking parts 222 are axially detachably arranged at intervals on the inner wall of the shell 221. Preferably, the blocking part 222 is a wear-resistant blocking belt, which is evenly axially detachably distributed on the inner wall of the shell 221, and its material is preferably NM500 wear-resistant steel. Because the blocking part 222 is detachably installed with the shell 221, the installation and maintenance are convenient, and the service life of the equipment is improved.

[0060] In a specific embodiment, a plurality of grooves are axially spaced on the inner side wall of the shell 221, and the blocking part 222 is axially inserted and clamped in the grooves, and at the same time, the blocking part 222 is threadedly installed on the shell 221 by screws radially. To ensure the blocking effect, the blocking part 222 should protrude from the inner surface of the shell 221.

[0061] As Figures 1 - 6 shown, the squeezing device 4 includes a reverse pushing member 41 and a reverse squeezing member 42;

[0062] The reverse squeezing member 42 is arranged at the front end of the double-threaded spiral shaft 21. The reverse pushing member 41 is connected to the water filter shell 22 and there is a gap between the reverse pushing member 41 and the end face of the water filter shell 22, and the gap is the discharge port; the reverse squeezing member 42 is also in contact with the reverse pushing member 41 to apply a force to the reverse pushing member 41 to maintain, expand or reduce the size of the discharge port.

[0063] Because the discharge port is formed by the gap between the front end face of the water filter shell 22 and the reverse pushing member 41, the discharge port is much smaller than the water filter shell 22, so the wet garbage output from the discharge port will inevitably be squeezed, thus realizing the secondary dehydration of the wet garbage and improving the dehydration effect.

[0064] According to actual needs, the size of the discharge port can be adjusted by the reverse extrusion member 42. Specifically: If it is necessary to maintain the size of the discharge port, just keep the force exerted by the reverse extrusion member 42 on the reverse pusher 41 unchanged. At this time, the moisture content of the residue extruded from the discharge port remains unchanged. If it is necessary to increase the size of the discharge port, reduce the force exerted by the reverse extrusion member 42 on the reverse pusher 41. At this time, the moisture content of the residue extruded from the discharge port increases. If it is necessary to reduce the size of the discharge port, increase the force exerted by the reverse extrusion member 42 on the reverse pusher 41. At this time, the moisture content of the residue extruded from the discharge port decreases.

[0065] As Figure 1 shown, the reverse pusher 41 has a disc-shaped structure, and the reverse pusher 41 is sleeved on the double-threaded spiral shaft 21 and rotates with the double-threaded spiral shaft 21. Because the extruded wet waste has a relatively high temperature, a dispersing part is provided on the reverse pusher 41 that rotates with the double-threaded spiral shaft 21; the dispersing part is arranged inside the discharge port to disperse the extruded wet waste, which is beneficial to further evaporation of moisture and improves the dehydration effect.

[0066] Preferably, alloy blades are inlaid and welded on the reverse pusher, which has a function of dispersing the extruded wet waste, is beneficial to further evaporation of moisture, and improves the dehydration effect.

[0067] As Figure 5 and Figure 6 shown, the reverse extrusion member 42 includes an elastic component 421 and a reverse pushing component 422; one end of the elastic component 421 is connected to the reverse pusher 41, and the other end is connected to the reverse pushing component 422; the reverse pushing component 422 exerts a force on the reverse pusher 41 by squeezing the elastic component 421 to maintain, expand or reduce the size of the discharge port. Among them, the elastic component 421 plays a buffering role and can discharge non-crushable hard substances. The moisture content of the residue extruded from the discharge port is adjusted by adjusting the size of the discharge port.

[0068] The elastic component 421 includes an elastic body 4211 and an elastic part gland 4212 provided at the end of the elastic body 4211; one end of the elastic body 4211 is connected to the reverse pusher 41, and the other end is connected to the reverse pushing component 422 through the elastic part gland 4212. Among them, the elastic part 4211 is preferably a spring, and the spring is sleeved on the double-threaded spiral shaft 21.

[0069] In a specific embodiment, the reverse pushing component 422 is a hollow jack. In this way, the size of the discharge port can be adjusted in real time according to actual needs during the rotation of the double-threaded spiral shaft 21, and because the force exerted by the reverse pushing component 422 on the reverse pusher 41 coincides with the central axis of the double-threaded spiral shaft 21, it is more capable of evenly adjusting the force on the reverse pusher 41.

[0070] As Figures 14 - 16As shown, the hollow jack includes an outer cylinder body 4221, an inner cylinder body 4222 sleeved inside the outer cylinder body 4221, a piston 4223, a driving member, and a control device for controlling the driving member;

[0071] A piston activity chamber 4224 is formed between the outer cylinder body 4221 and the inner cylinder body 4222. One end of the piston 4223 is arranged inside the piston activity chamber 4224, and the other end is connected to the elastic component 421; the control device controls the driving member to start to drive the piston 4223 to axially move inside the piston activity chamber 4224 so as to squeeze the elastic component 421.

[0072] The control device can adopt various units that can realize adjustable digital signals, such as various unit machines, microcontrollers, DSP (Digital Signal Processor), and FPGA (Field Programmable Gate Array).

[0073] In this embodiment, the control device can adopt a single-chip microcomputer. By programming the single-chip microcomputer, various control functions can be realized. For example, in this embodiment, it can be realized to control the driving member (such as a motor) to rotate forward to push the piston 4223 towards the elastic component 421 to reduce the size of the discharge port, or control the driving member (such as a motor) to rotate in reverse to pull the piston 4223 away from the elastic component 421 to increase the size of the discharge port, or control the driving member to stop to maintain the size of the discharge port. In this way, the purpose of adjusting the size of the discharge port in real time can be achieved, and then the moisture content of the extruded residue can be adjusted.

[0074] Because the reverse extrusion component 42 of this embodiment can be independently controlled by the control device to adjust the size of the discharge port, this embodiment can adjust the size of the discharge port by adjusting the piston 4223 according to actual needs without stopping the double-line spiral shaft 21.

[0075] The usage process of this embodiment is as follows:

[0076] For convenient use, install the food waste squeezing machine of this embodiment on the frame. The user puts the bagged wet waste into the machine shell 1 from the funnel-shaped feed port 11. The bagged wet waste is torn by the wear-resistant protrusions on the surface of the spiral blades of the double-line spiral shaft 21 (such as surfacing NM500 wear-resistant steel on the surface of the spiral blades), thus avoiding manual sorting. After the bag is torn, the wet waste rubs against the double-line spiral shaft 21 to generate a relatively high temperature, which improves the efficiency of the first dehydration;

[0077] The double-line spiral shaft 21 will also drag the wet waste towards the discharge port at the same time. And because the reverse pushing member 41 has an extrusion force on the residue output from the discharge port, the second dehydration of the wet waste is realized, further improving the dehydration efficiency. After the above two dehydrations, the moisture content of the residue drops to 15% - 30%.

[0078] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described generic features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0079] As mentioned above, the above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A kitchen waste squeezing machine, comprising a machine shell (1) provided with a feed inlet (11), a screw squeezing device (2) arranged inside the machine shell (1), and a driving device (3) for driving the screw squeezing device (2) to rotate to push wet waste towards the discharge port, characterized in that, It further includes a squeezing device (4) for squeezing the wet garbage at the discharge port; the acting force of the squeezing device (4) on the wet garbage at the discharge port is parallel to the central axis of the screw squeezing device (2); the screw squeezing device (2) includes a double-thread screw shaft (21) rotatably connected to the driving device (3) and a water filtering shell (22); the front end of the double-thread screw shaft (21) axially penetrates through the water filtering shell (22) and is connected to the squeezing device (4); the lead L of the double-thread screw shaft (21) is twice the major diameter D of the screw, and the helix angle is 35°; the water filtering shell (22) includes a shell body (221), and a plurality of blocking parts (222) are detachably arranged on the inner wall of the shell body (221); the blocking parts (222) are in strip shapes, and a plurality of the blocking parts (222) are axially detachably arranged on the inner wall of the shell body (221) at intervals; the squeezing device (4) includes a pushing member (41) and a reverse squeezing member (42); the reverse squeezing member (42) is arranged at the front end of the double-thread screw shaft (21), the pushing member (41) is connected to the water filtering shell (22), and there is a gap between the pushing member (41) and the end face of the water filtering shell (22), and the gap is the discharge port; the reverse squeezing member (42) is also in contact with the pushing member (41) to apply a force to the pushing member (41) to maintain, expand or reduce the size of the discharge port; the reverse squeezing member (42) includes an elastic component (421) and a reverse pushing component (422); one end of the elastic component (421) is connected to the pushing member (41), and the other end is connected to the reverse pushing component (422); the reverse pushing component (422) applies a force to the pushing member (41) by squeezing the elastic component (421) to maintain, expand or reduce the size of the discharge port; alloy blades are arranged on the pushing member (41).

2. The food waste squeezing machine according to claim 1, wherein, The acting force of the squeezing device (4) on the wet garbage at the discharge port coincides with the central axis of the screw squeezing device (2).

3. The food waste squeezing machine according to claim 1, characterized in that, The elastic component (421) includes an elastic body (4211) and an elastic part gland (4212) arranged at the end of the elastic body (4211); one end of the elastic body (4211) is connected to the pushing member (41), and the other end is connected to the reverse pushing component (422) through the elastic part gland (4212).

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