Milk slurry pump and working method

Abstract

The present invention discloses a milk slurry pump and a working method. A milk slurry pump comprises a pump cover a and a pump cover b which are connected to each other by two pump cover nuts. A feed channel and a discharge channel are respectively provided inside the pump cover a. A discharge joint connected to the discharge channel is installed on the surface of the pump cover a. A pressure relief hole is connected between the opposite surfaces of the feed channel and the discharge channel. A valve body assembly matched with the pressure relief hole is installed inside the feed channel. An air inlet connected to the feed channel is also provided inside the pump cover a. A feed pipe connected to the feed channel is installed at the bottom of the pump cover a and at a position corresponding to the position below the valve body assembly. The present invention changes the integrated structure of the traditional pump body into a split and quick-detachable structure through the structural setting of the pump body. When in use, the fast disassembly and separation of the relevant structural elements in the pump body can be realized through the setting of the fixing pin a, the fixing pin b and the two pump cover nuts.

Description

Technical Field

[0001] The present invention relates to the technical field of milk slurry pumps, in particular to a milk slurry pump and a working method thereof. Background Art

[0002] The milk pump belongs to the puffing system of the ice cream machine and is an important component of the ice cream machine. Most of the ice cream machines on the market now use a built-in milk pump. Due to food hygiene, after the ice cream machine finishes working every day, the merchant (user) needs to remove the milk pump from the ice cream machine for cleaning. Therefore, the milk pump for the ice cream machine is required to be simple and convenient to disassemble and clean, but the existing pump body cannot meet the above-mentioned quick disassembly requirements.

[0003] At present, the most commonly used milk pumps for ice cream machines on the market include gear pumps, piston pumps, peristaltic pumps, etc. Although the specific pump body structures are different, they are all used to achieve the expansion of air and ice cream liquid raw materials. In recent years, bottom-suction ice cream machines have been widely used in the market. While sucking the material, a certain amount of air will be sucked in. In this way, while meeting the taste conditions, the expansion rate of ice cream milk is improved, the competitiveness of ice cream machines is improved, and the economic benefits of ice cream merchants are increased. However, gear pumps and peristaltic pumps have poor self-priming capabilities and cannot suck the milk from the milk tank into the pump body. An auxiliary pump needs to be added or the slurry is placed above the pump body. At the same time, the existing milk pump cannot automatically reflux the milk when the milk is excessive. Based on this, the present invention provides a milk pump and a working method to solve the problems raised in the above background technology. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a milk pump and a working method. The present invention changes the one-piece structure of the traditional pump body into a split quick-detachable structure through the structural setting of the pump body. When in use, the fast disassembly and separation of the relevant structural elements in the pump body can be achieved through the setting of fixing pin a, fixing pin b and two pump cover nuts.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical scheme, a milk slurry pump and a working method, the technical scheme adopted is: comprising a pump cover a and a pump cover b connected to each other by two pump cover nuts, the pump cover a is respectively provided with a feed channel and a discharge channel, the surface of the pump cover a is provided with a discharge joint connected to the discharge channel, a pressure relief hole is connected between the opposite surfaces of the feed channel and the discharge channel, a valve body assembly matched with the pressure relief hole is installed in the feed channel, an air inlet connected to the feed channel is also provided in the pump cover a, a feed pipe connected to the feed channel is installed at the bottom of the pump cover a and at a position corresponding to the position below the valve body assembly, a group of slurry holes distributed in a circumferential array are provided on the upper part of the feed pipe, a plurality of slurry inlet holes connected to the slurry holes and a plurality of extrusion holes connected to the discharge channel are respectively provided in the pump cover b, and a transmission extrusion assembly for extruding slurry is installed in the pump cover b.

[0008] As a preferred embodiment, the valve body assembly includes a valve plug, the radius of the valve plug is 1.5-3 times the radius of the pressure relief hole, the radius of the valve plug is 0.7-0.85 times the radius of the feed channel, a valve stem is fixedly installed on the bottom end of the valve plug, the peripheral side of the valve stem is slidably connected to the feed pipe and the peripheral side of the valve stem is sleeved with a compression spring, and a sealing ring a that cooperates with the pressure relief hole is fixedly installed on the top end of the valve plug.

[0009] As a preferred embodiment, the air inlet hole is arranged above the slurry penetration hole and the slurry inlet hole, and the air inlet hole is arranged below the pressure relief hole. The air inlet hole is inclined downward in the direction away from the feed flow channel, and the angle between the axis of the air inlet hole and the horizontal line is 28°. The aperture of the air inlet hole is 0.6-0.8 times the aperture of the pressure relief hole. The surface of the pump cover a is threadedly connected with a filter cover matching the air inlet hole, and the surface of the filter cover is evenly distributed with ventilation filter holes. The inside of the pump cover a is installed with a regulating valve for adjusting the air intake rate of the air inlet hole.

[0010] As a preferred embodiment, the transmission extrusion assembly includes a transmission shaft rotatably connected to the pump cover b, and an eccentric wheel and an extrusion gear are fixedly installed on the peripheral side of the transmission shaft from the outside to the inside in sequence, and an outer rotating wheel is fixedly installed on the peripheral side of the eccentric wheel, and an extrusion tooth groove is fixedly opened inside the outer rotating wheel to cooperate with the extrusion gear, and an extrusion cavity whose volume changes with the rotation of the outer rotating wheel is fixedly arranged between the relative surfaces of the extrusion gear and the extrusion tooth groove, and one end of the extrusion hole and the slurry inlet hole are fixedly connected to the extrusion cavity.

[0011] As a preferred solution, the extruded tooth groove is a pentagonal tooth groove with a transition fillet, and the extruded gear is a quadrangular gear with a transition fillet.

[0012] As a preferred solution, a fixing pin a cooperating with the feed pipe and a fixing pin b cooperating with the discharge joint are respectively installed on the surface of the pump cover a.

[0013] As a preferred embodiment, a transmission handle that cooperates with the pump cover a is fixedly installed on the peripheral side of the feed pipe, pin grooves are provided on the surfaces of the discharge joint and the transmission handle, and a sealing ring b that cooperates with the discharge channel is fixedly installed on the tail end of the discharge joint.

[0014] As a preferred embodiment, the axis of the feed channel is perpendicular to the axis of the discharge channel, the axes of the slurry inlet hole and the extrusion hole are parallel to the axis of the transmission shaft, and the axis of the transmission shaft is perpendicular to the axis of the feed channel.

[0015] As a preferred solution, two horizontally arranged threaded rods which are threadably matched with the pump cover nut are fixedly mounted on the surface of the pump cover b, and through holes are provided inside the pump cover a at positions corresponding to the two threaded rods.

[0016] A working method of a milk slurry pump comprises the following steps:

[0017] SS001, layout, before operation, the feed pipe is connected with the external milk slurry storage container or milk slurry tank, the discharge flow channel is connected with the external milk slurry freezing cylinder through the pipeline, and the transmission shaft is connected with the external power source;

[0018] SS002, milk slurry delivery. Before working, the regulating valve is set to adjust the air intake volume per unit time of the air inlet. During working, the transmission shaft outputs the speed at the set speed. After the transmission shaft works, it drives the outer wheel and the extrusion gear to rotate. After the outer wheel and the extrusion gear rotate, the size of the extrusion chamber is changed reciprocatingly. After the size of the extrusion chamber is changed, the milk slurry is sucked from the feed flow channel. The milk slurry in the feed flow channel enters between the extrusion gear and the extrusion tooth groove through the slurry penetration hole and the slurry inlet hole. After entering, with the eccentric rotation of the outer wheel and the rotation of the extrusion gear, the milk slurry is squeezed out from the extrusion hole to the discharge joint. The milk slurry flowing out of the discharge joint finally enters the external designated milk slurry freezing cylinder.

[0019] SS003, backflow. When there is excessive milk slurry in the freezing cylinder, the milk slurry pump will automatically detect and stop working. When the milk slurry is over-pressurized in the discharge flow channel, the milk slurry increases the pressure on the valve plug through the pressure relief hole and compresses the compression spring at the bottom of the valve plug. After the compression spring is compressed, the valve plug moves downward. After the valve plug moves downward, the discharge flow channel is connected to the feed flow channel through the pressure relief hole. The excess milk slurry at the discharge flow channel then flows back to the milk slurry tank through the feed pipe.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a milk slurry pump and a working method, which have the following beneficial effects:

[0022] 1. The present invention changes the one-piece structure of the traditional pump body into a split quick-detachable structure through the structural setting of the pump body. When in use, the fast disassembly and separation of the relevant structural elements in the pump body can be realized through the setting of the fixing pin a, the fixing pin b and the two pump cover nuts. The realization of the above-mentioned fast disassembly and separation effect makes it convenient for users to quickly clean and maintain the pump body, which is convenient to use and has low maintenance cost.

[0023] 2. The present invention can achieve efficient puffing of milk slurry by setting the position and angle of the air inlet hole, thereby improving the edible taste of the milk slurry. By setting the valve body assembly, the milk slurry can be automatically and quickly refluxed when the milk slurry is excessive. By achieving the above-mentioned milk slurry reflux effect, the practicality and functionality of the milk slurry pump are effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a milk slurry pump of the present invention;

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the explosion structure;

[0026] Figure 3 For the present invention Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0027] Figure 4 For the present invention Figure 2 A schematic diagram of the local enlarged structure at B in the middle;

[0028] Figure 5 For the present invention Figure 2 A schematic diagram of the local enlarged structure at C in the middle;

[0029] Figure 6 For the present invention Figure 1 A schematic diagram of the cross-sectional structure of;

[0030] Figure 7 For the present invention Figure 6 A schematic diagram of the local enlarged structure at D in the middle;

[0031] Figure 8 For the present invention Figure 6 A schematic diagram of the local enlarged structure at E in the middle;

[0032] Fig. 9 It is a schematic structural diagram of the eccentric wheel and the transmission shaft of the present invention.

[0033] In the figure: 1. pump cover nut; 2. pump cover a; 3. pump cover b; 4. feed flow channel; 5. discharge flow channel; 6. discharge joint; 7. pressure relief hole; 8. air inlet hole; 9. feed pipe; 10. slurry penetration hole; 11. slurry inlet hole; 12. extrusion hole; 13. valve plug; 14. valve stem; 15. compression spring; 16. filter cover; 17. regulating valve; 18. transmission shaft; 19. eccentric wheel; 20. extrusion gear; 21. outer rotating wheel; 22. extrusion tooth groove; 23. extrusion cavity; 24. fixing pin a; 25. fixing pin b; 26. pin groove; 27. threaded rod; 28. transmission handle. DETAILED DESCRIPTION

[0034] The present invention will be further described and illustrated below in conjunction with specific embodiments and accompanying drawings:

[0035] See also Figure 1-9 The present invention is a milk pump, which adopts the technical scheme of comprising a pump cover a2 and a pump cover b3 connected to each other by two pump cover nuts 1, two horizontally arranged threaded rods 27 threadedly matched with the pump cover nuts 1 are fixedly mounted on the surface of the pump cover b3, and through holes are provided inside the pump cover a2 at positions corresponding to the two threaded rods 27;

[0036] The pump cover a2 is provided with a feed channel 4 and a discharge channel 5, respectively. The axis of the feed channel 4 is perpendicular to the axis of the discharge channel 5.

[0037] A discharge connector 6 connected to the discharge channel 5 is installed on the surface of the pump cover a2. A sealing ring b matched with the discharge channel 5 is fixedly installed at the tail end of the discharge connector 6. The sealing ring b is arranged to effectively ensure the sealing of the connection between the discharge connector 6 and the discharge channel 5. When in use, the discharge connector 6 is connected to the milk slurry freezing cylinder through a pipeline or directly.

[0038] A pressure relief hole 7 is connected between the opposite surfaces of the feed flow channel 4 and the discharge flow channel 5. A valve body assembly matching the pressure relief hole 7 is installed inside the feed flow channel 4. A feed pipe 9 connected to the feed flow channel 4 is installed at the bottom of the pump cover a2 and at a position corresponding to the position below the valve body assembly;

[0039] The surface of the pump cover a2 is respectively installed with a fixing pin a24 that cooperates with the feed pipe 9 and a fixing pin b25 that cooperates with the discharge joint 6. The peripheral side of the feed pipe 9 is fixedly installed with a transmission handle 28 that cooperates with the pump cover a2. The surfaces of the discharge joint 6 and the transmission handle 28 are provided with pin grooves 26. Through the arrangement of the fixing pin a24 and the fixing pin b25, on the one hand, the pump cover a2 can ensure effective fixation of the feed pipe 9 and the discharge joint 6, and on the other hand, the feed pipe 9 and the discharge joint 6 can be quickly disassembled from the pump cover a2. Through the realization of the above technical effects, the assembly and use flexibility of the milk slurry pump are effectively improved;

[0040] The feed pipe 9 is a hollow tubular structure with openings at both ends;

[0041] When working, the feed pipe 9 is connected with an external milk paste storage container or milk paste tank;

[0042] The valve body assembly includes a valve plug 13, the radius of the valve plug 13 is twice the radius of the pressure relief hole 7, the radius of the valve plug 13 is 0.8 times the radius of the feed channel 4, a valve stem 14 is fixedly installed at the bottom end of the valve plug 13, the peripheral side of the valve stem 14 is slidably connected to the feed pipe 9 and the peripheral side of the valve stem 14 is sleeved with a compression spring 15, and a sealing ring a that matches the pressure relief hole 7 is fixedly installed at the top end of the valve plug 13;

[0043] When the feed pipe 9 performs normal feeding operation, due to the elastic effect of the compression spring 15, the top end of the valve plug 13 fits with the inner top end of the feed flow channel 4. After fitting, the valve plug 13 then blocks the communication between the feed flow channel 4 and the pressure relief hole 7. Due to the setting of the sealing ring a, the valve plug 13 can effectively ensure the blocking effect of the above-mentioned flow point;

[0044] When in use, the discharge flow channel 5 is connected to the external milk slurry freezing cylinder through a pipeline. When the milk slurry in the freezing cylinder is excessive, the milk slurry pump will automatically detect and stop working. In the middle, due to inertia or other reasons, in order to avoid milk slurry overflow, the milk slurry can increase the pressure on the valve plug 13 through the pressure relief hole 7 and compress the anti-compression spring 15 at the bottom of the valve plug 13. After the anti-compression spring 15 is compressed, the valve plug 13 moves downward. After the valve plug 13 moves downward, the discharge flow channel 5 is connected to the feed flow channel 4 through the pressure relief hole 7. The excess milk slurry at the discharge flow channel 5 then flows back to the milk slurry tank through the feed pipe 9;

[0045] A group of slurry holes 10 distributed in a circumferential array are opened on the upper part of the feed pipe 9. The slurry holes 10 are central holes and the axes of the slurry holes 10 are perpendicular to the axis of the feed pipe 9.

[0046] The interior of the pump cover b3 is respectively provided with a plurality of slurry inlet holes 11 connected with the slurry penetration hole 10 and a plurality of extrusion holes 12 connected with the discharge channel 5. The extrusion holes 12 are arranged above the slurry inlet holes 11. The positions of the slurry penetration holes 10 correspond to the positions of the slurry inlet holes 11. A transmission extrusion assembly for extruding slurry is installed inside the pump cover b3.

[0047] The pump cover a2 is also provided with an air inlet hole 8 connected to the feed flow channel 4;

[0048] The air inlet hole 8 is arranged above the slurry penetration hole 10 and the slurry inlet hole 11, and the air inlet hole 8 is arranged below the pressure relief hole 7. The position of the air inlet hole 8 is arranged to prevent the milk slurry from overflowing from the air inlet hole 8 when the milk slurry is fed. The arrangement of the air inlet hole 8 can make the milk slurry mixed with air when it is fed. The addition of air can make the milk slurry puffed, soft, and have a better taste.

[0049] The air inlet hole 8 is tilted downward away from the feed flow channel 4, the angle between the axis of the air inlet hole 8 and the horizontal line is 28°, and the aperture of the air inlet hole 8 is 0.6 times the aperture of the pressure relief hole 7;

[0050] The angle of the air inlet 8 is set to effectively prevent the milk slurry from overflowing when it flows back excessively;

[0051] The surface of the pump cover a2 is threadedly connected with a filter cover 16 that matches the air inlet hole 8. The surface of the filter cover 16 is evenly distributed with ventilation filter holes. The inside of the pump cover a2 is installed with a regulating valve 17 for adjusting the air intake rate of the air inlet hole 8. When in use, the filter cover 16 is threadedly connected to the pump cover a2 so that the filter cover 16 can be quickly disassembled. Through the setting of the filter cover 16, the impurity content of the air entering the air inlet hole 8 can be effectively reduced. Through the setting of the regulating valve 17, the air intake volume of the air inlet hole 8 per unit time can be effectively adjusted, and then the air content during milk slurry transportation can be adjusted.

[0052] The transmission extrusion assembly includes a transmission shaft 18 rotatably connected to the pump cover b3. When in use, the transmission shaft 18 is connected to the external power device as a whole, and the external power device inputs a power source to the transmission shaft 18;

[0053] The axes of the pulp inlet hole 11 and the extrusion hole 12 are parallel to the axis of the transmission shaft 18, and the axis of the transmission shaft 18 is perpendicular to the axis of the feed flow channel 4;

[0054] An eccentric wheel 19 and an extrusion gear 20 are fixedly mounted on the peripheral side of the transmission shaft 18 in sequence from outside to inside. An outer rotating wheel 21 is fixedly mounted on the peripheral side of the eccentric wheel 19. An extrusion tooth groove 22 matching with the extrusion gear 20 is fixedly opened inside the outer rotating wheel 21. The extrusion tooth groove 22 is a pentagonal tooth groove with a transition fillet. The extrusion gear 20 is a quadrangular gear with a transition fillet. An extrusion cavity 23 whose volume changes with the rotation of the outer rotating wheel 21 is fixedly arranged between the opposite surfaces of the extrusion gear 20 and the extrusion tooth groove 22. One end of the extrusion hole 12 and the pulp inlet hole 11 are both fixedly connected to the extrusion cavity 23.

[0055] Due to the setting of the eccentric wheel 19, the outer rotating wheel 21 and the extrusion gear 20 form a cycloidal transmission mode. When the outer rotating wheel 21 and the extrusion gear 20 rotate in the same direction, the volume of the extrusion cavity 23 changes. When the milk slurry enters the extrusion cavity 23, due to the action of the extrusion gear 20, the milk slurry entering from the slurry inlet hole 11 is extruded from the extrusion hole 12.

[0056] A working method of a milk slurry pump comprises the following steps:

[0057] SS001. Laying out. Before operation, the feed pipe 9 is connected to an external milk slurry storage container or milk slurry tank, the discharge flow channel 5 is connected to an external milk slurry freezing cylinder through a pipeline, and the transmission shaft 18 is connected to an external power source;

[0058] SS002, milk slurry delivery. Before operation, the regulating valve 17 is set to adjust the air intake volume per unit time of the air inlet 8. During operation, the transmission shaft 18 outputs the rotation speed at the set speed. After the transmission shaft 18 works, the outer rotating wheel 21 and the extrusion gear 20 are driven to rotate. After the outer rotating wheel 21 and the extrusion gear 20 rotate, the chamber size of the extrusion chamber 23 is reciprocated. After the chamber size of the extrusion chamber 23 is changed, the milk slurry is sucked from the feed flow channel 4. The milk slurry in the feed flow channel 4 enters between the extrusion gear 20 and the extrusion tooth groove 22 through the slurry penetration hole 10 and the slurry inlet hole 11. After entering, with the eccentric rotation of the outer rotating wheel 21 and the rotation of the extrusion gear 20, the milk slurry is extruded from the extrusion hole 12 to the discharge joint 6. The milk slurry flowing out of the discharge joint 6 finally enters the external designated milk slurry freezing cylinder.

[0059] SS003, backflow. When there is excessive milk slurry in the freezing cylinder, the milk slurry pump will automatically detect and stop working. When the milk slurry is over-pressurized in the discharge flow channel 5, the milk slurry increases the pressure on the valve plug 13 through the pressure relief hole 7 and compresses the anti-compression spring 15 at the bottom of the valve plug 13. After the anti-compression spring 15 is compressed, the valve plug 13 moves downward. After the valve plug 13 moves downward, the discharge flow channel 5 is connected with the feed flow channel 4 through the pressure relief hole 7. The excess milk slurry at the discharge flow channel 5 then flows back to the milk slurry tank through the feed pipe 9.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A milk pump, comprising a pump cover a (2) and a pump cover b (3) connected to each other by two pump cover nuts (1), characterized in that: The pump cover a (2) is provided with a feed channel (4) and a discharge channel (5) respectively inside, a discharge joint (6) connected to the discharge channel (5) is installed on the surface of the pump cover a (2), a pressure relief hole (7) is connected between the opposing surfaces of the feed channel (4) and the discharge channel (5), a valve body assembly matched with the pressure relief hole (7) is installed inside the feed channel (4), and an air inlet hole (8) connected to the feed channel (4) is also provided inside the pump cover a (2). A feed pipe (9) connected to the feed channel (4) is installed at the bottom of the pump cover a (2) and at a position corresponding to the bottom of the valve body assembly. A group of slurry holes (10) distributed in a circular array are opened on the upper part of the feed pipe (9). A plurality of slurry inlet holes (11) connected to the slurry holes (10) and a plurality of extrusion holes (12) connected to the discharge channel (5) are respectively opened inside the pump cover b (3). A transmission extrusion assembly for extruding slurry is installed inside the pump cover b (3).

2. A milk pump according to claim 1, characterized in that: The valve body assembly comprises a valve plug (13), the radius of the valve plug (13) is 1.5-3 times the radius of the pressure relief hole (7), the radius of the valve plug (13) is 0.7-0.85 times the radius of the feed channel (4), a valve stem (14) is fixedly mounted on the bottom end of the valve plug (13), the peripheral side surface of the valve stem (14) is slidably connected to the feed pipe (9) and the peripheral side surface of the valve stem (14) is sleeved with a compression spring (15), and a sealing ring a that cooperates with the pressure relief hole (7) is fixedly mounted on the top end of the valve plug (13).

3. A milk pump according to claim 1, characterized in that: The air inlet hole (8) is arranged above the pulp penetration hole (10) and the pulp inlet hole (11), and the air inlet hole (8) is arranged below the pressure relief hole (7). The air inlet hole (8) is inclined downward in a direction away from the feed flow channel (4), and the angle between the axis of the air inlet hole (8) and the horizontal line is 28°. The aperture of the air inlet hole (8) is 0.6-0.8 times the aperture of the pressure relief hole (7). The surface of the pump cover a (2) is threadedly connected with a filter cover (16) matched with the air inlet hole (8), and the surface of the filter cover (16) is evenly distributed with ventilation filter holes. The pump cover a (2) is internally installed with a regulating valve (17) for adjusting the air intake rate of the air inlet hole (8).

4. A milk pump according to claim 1, characterized in that: The transmission extrusion assembly comprises a transmission shaft (18) rotatably connected to the pump cover b (3); an eccentric wheel (19) and an extrusion gear (20) are fixedly mounted on the peripheral side surface of the transmission shaft (18) from the outside to the inside in sequence; an outer rotating wheel (21) is fixedly mounted on the peripheral side surface of the eccentric wheel (19); an extrusion tooth groove (22) matching the extrusion gear (20) is fixedly provided inside the outer rotating wheel (21); an extrusion cavity (23) whose volume changes with the rotation of the outer rotating wheel (21) is fixedly arranged between the relative surfaces of the extrusion gear (20) and the extrusion tooth groove (22); and one end of the extrusion hole (12) and the pulp inlet hole (11) are both fixedly connected to the extrusion cavity (23).

5. A milk pump according to claim 4, characterized in that: The extrusion tooth groove (22) is a pentagonal tooth groove with a transition fillet, and the extrusion gear (20) is a quadrangular gear with a transition fillet.

6. A milk pump according to claim 1, characterized in that: The surface of the pump cover a (2) is respectively provided with a fixing pin a (24) cooperating with the feed pipe (9) and a fixing pin b (25) cooperating with the discharge joint (6).

7. A milk pump according to claim 6, characterized in that: A transmission handle (28) that cooperates with the pump cover a (2) is fixedly mounted on the peripheral side surface of the feed pipe (9), and pin grooves (26) are provided on the surfaces of the discharge joint (6) and the transmission handle (28), and a sealing ring b that cooperates with the discharge channel (5) is fixedly mounted on the tail end of the discharge joint (6).

8. A milk pump according to claim 1, characterized in that: The axis of the feed channel (4) is perpendicular to the axis of the discharge channel (5), the axes of the slurry inlet hole (11) and the extrusion hole (12) are parallel to the axis of the transmission shaft (18), and the axis of the transmission shaft (18) is perpendicular to the axis of the feed channel (4).

9. A milk pump according to claim 1, characterized in that: The surface of the pump cover b (3) is fixedly mounted with two horizontally arranged threaded rods (27) which are threadably matched with the pump cover nut (1), and the inside of the pump cover a (2) is provided with through holes at positions corresponding to the two threaded rods (27).

10. A working method of a milk pump according to any one of claims 1 to 9, characterized in that: The following steps are involved: SS001. Laying out. Before operation, the feed pipe (9) is connected to an external milk slurry storage container or milk slurry tank, the discharge flow channel (5) is connected to an external milk slurry freezing cylinder through a pipeline, and the transmission shaft (18) is connected to an external power source; SS002, milk slurry delivery, before working, by setting the regulating valve (17), the amount of air that can be taken in per unit time of the air inlet hole (8) is adjusted. During working, the transmission shaft (18) outputs the rotation speed at the set speed. After the transmission shaft (18) works, it drives the outer rotating wheel (21) and the extrusion gear (20) to rotate. After the outer rotating wheel (21) and the extrusion gear (20) rotate, the chamber size of the extrusion chamber (23) is reciprocated. The chamber size of the extrusion chamber (23) is changed. After a small change, the milk slurry is then sucked into the feed flow channel (4), and the milk slurry in the feed flow channel (4) enters between the extrusion gear (20) and the extrusion tooth groove (22) through the slurry penetration hole (10) and the slurry inlet hole (11). After entering, along with the eccentric rotation of the outer rotating wheel (21) and the rotation of the extrusion gear (20), the milk slurry is then extruded from the extrusion hole (12) to the discharge joint (6), and the milk slurry flowing out of the discharge joint (6) finally enters the external designated milk slurry freezing cylinder; SS003, backflow. When there is an excess of milk slurry in the freezing cylinder, the milk slurry pump will automatically detect and stop working. When the milk slurry is over-pressurized in the discharge flow channel (5), the milk slurry increases the pressure on the valve plug (13) through the pressure relief hole (7) and compresses the anti-pressure spring (15) at the bottom of the valve plug (13). After the anti-pressure spring (15) is compressed, the valve plug (13) moves downward. After the valve plug (13) moves downward, the discharge flow channel (5) is connected to the feed flow channel (4) through the pressure relief hole (7). The excess milk slurry at the discharge flow channel (5) then flows back to the milk slurry tank through the feed pipe (9).

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