CN111938099A

CN111938099A - Automatic equipment of pickling of beef

Info

Publication number: CN111938099A
Application number: CN202010781034.4A
Authority: CN
Inventors: 苏建国; 滕年龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-11-17

Abstract

The invention discloses automatic beef curing equipment, relates to the technical field of beef processing equipment, and has the advantages of realizing automatic curing of beef and reducing manual operation, wherein the technical scheme is as follows: the beef curing device comprises a stirring box, wherein an inlet pipe for allowing beef to be cured to enter is arranged at the upper end of the stirring box, a discharge pipe communicated with the inside of the stirring box is arranged at the lower end of the outer wall of the stirring box, the outlet of the discharge pipe is sealed through a sealing part, a stirring device is arranged in the stirring box, and a seasoning input device is arranged in the inlet pipe.

Description

Automatic equipment of pickling of beef

Technical Field

The invention relates to the technical field of beef processing equipment, in particular to automatic beef curing equipment.

Background

Beef is the third consumption meat in the world, accounts for about 25% of the meat product market, lags behind pork (38%) and poultry (30%), and is the first three countries of the world consumption beef in the United states, Brazil and China, and the flavor is pursued in the traditional instant beef product processing in China, and the following defects exist in the beef production process: after the beef is primarily processed, the beef needs to be poured into the seasoning, the beef is manually turned, the beef and the seasoning are fully mixed, and the beef is manually fished out after being pickled for a plurality of hours, so that the defects of long pickling time and low processing efficiency are overcome.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the automatic beef curing equipment which has the advantages of realizing automatic curing of beef and reducing manual operation.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an automatic equipment of pickling of beef, includes the agitator tank, the agitator tank upper end is equipped with the inlet pipe that supplies to wait to pickle beef and get into, agitator tank outer wall lower extreme be equipped with the agitator tank in the discharging pipe of intercommunication, the discharging pipe export is sealed through closed piece, be equipped with agitating unit in the agitator tank, be equipped with condiment input device in the inlet pipe.

Through adopting above-mentioned technical scheme, will wait to cure beef and put into the feed tube, the beef of curing is treated to the condiment input device in the feed tube this moment and is spouted the material, treat to cure beef and get into the agitator tank in back convenient to, agitating unit begins work for wait to cure beef and condiment and carry out abundant mixture, reduce manual operation, machining efficiency is high, makes and treats to cure beef and carry out automatic the pickling after getting into the feed tube, practices thrift the cost of labor.

Preferably: agitating unit is including rotating the pivot of connection at the agitator tank bottom of the case, the agitator tank bottom of the case is equipped with places the case, the pivot is by fixing the first motor drive of placing the incasement, pivot outer wall circumference is equipped with a plurality of stirring vane who is located same height, and each stirring vane who is located same height is the one deck, and one deck stirring vane follows pivot length direction evenly is equipped with a plurality of layers, each layer stirring vane is from last down length increase gradually.

Preferably: two adjacent from top to bottom connect through the pole setting between the stirring vane, the pole setting is rotated and is connected on stirring vane, each pole setting outer wall circumference is equipped with the first arch of the conical of a plurality of dislocation distributions.

Preferably: the seasoning input device comprises a squeezing roller with two ends rotatably connected to the opposite pipe walls of an inlet pipe, a cavity is arranged in the squeezing roller, an input pipe coaxially arranged with the squeezing roller is arranged on the inlet pipe in a penetrating mode, the input pipe is communicated with the cavity, a plurality of pointed prickers are circumferentially arranged on the outer wall of the squeezing roller, the prickers are arranged in the cavity and extend into the cavity, one end, located outside the inlet pipe, of the input pipe is connected with a seasoning box filled with seasoning, a water suction pump is arranged on the input pipe, the gap in the horizontal direction between the outer wall of one side of the squeezing roller and the inner wall of the inlet pipe is the length of the prickers, the horizontal gap between the outer wall of the squeezing roller on the other side and the inner wall of the inlet pipe supplies beef to enter the stirring box, the squeezing roller is driven by a third motor fixed on the.

Preferably: the inner wall of the stirring box body is provided with a material guide plate for guiding the beef to the stirring device, and the material guide plate is arranged from the inner wall of the stirring box body in a downward inclination mode.

Preferably: the pricking pin is sleeved with a push ring, the outer wall of the extrusion roller is provided with a connecting rope connected with the push ring, and when the connecting rope is in a natural state, the push ring is sleeved outside the pricking pin.

Preferably: be equipped with the regulating plate parallel with the inlet pipe inner wall on the inlet pipe inner wall, rotate on the regulating plate be connected with wear out the inlet pipe outer wall the connecting rod and the relative both sides limit of regulating plate all contacts with the inlet pipe inner wall, the inlet pipe outer wall rotates and is connected with the driven gear coaxial with the connecting rod, set up the hole of wearing out that supplies the connecting rod to wear out on the driven gear, just connecting rod and driven gear threaded connection, the inlet pipe outer wall is equipped with the driving gear with driven gear meshing, the driving gear is by fixing the second motor drive on the inlet pipe outer wall, and beef gets into the agitator tank from the clearance between regulating plate and the squeeze roll outer wall.

Preferably: the discharge tube is distributed along the length direction of the stirring box, and a discharging piece for discharging beef into the discharge tube is arranged in the stirring box.

Preferably: the discharging part comprises an inclined plane arranged at the bottom of the inner wall box of the stirring box, the discharging pipe is far away from the higher end of the inclined plane, a plurality of knocking rods are hinged to the outer wall of the rotating shaft of the first motor in the circumferential direction, an extension spring for enabling the knocking rods to be far away from one end of the first motor and to be abutted to the bottom of the outer wall of the stirring box is arranged at the bottom of the outer wall box of the stirring box, a connecting block is connected to the bottom of the stirring box in a sliding mode along an arc line with the center line of the rotating shaft as the center of the circle, one end, far away from the knocking rods, of the extension spring is connected with the connecting block, a driving rod connected with the connecting block is arranged on the rotating shaft of the first motor, and when the knocking rods are driven by the first motor to rotate.

Preferably: one end of the knocking rod, which is abutted against the stirring box, is arranged to be spherical, and a silencing sleeve is sleeved outside the knocking rod.

In conclusion, the invention has the following beneficial effects: will wait to cure beef and put into the feed tube, the beef of curing is treated to the condiment input device in the feed tube this moment and is spouted the material, treat to cure beef and get into the agitator tank in the back conveniently, agitating unit begins work for wait to cure beef and condiment and carry out abundant mixture, reduce manual operation, machining efficiency is high, makes wait to cure beef and carry out automatic pickling after getting into the feed tube, practices thrift the cost of labor.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a schematic structural diagram of the present embodiment for showing a rotating shaft;

FIG. 3 is a schematic structural diagram of a second protrusion according to the present embodiment;

fig. 4 is a schematic structural diagram of the third motor according to the present embodiment.

1. A stirring box; 11. a feed pipe; 12. a discharge pipe; 121. a rubber plug; 13. a rotating shaft;

14. placing a box; 141. a first motor; 15. a stirring blade; 151. erecting a rod; 152. a first protrusion; 16. a squeeze roll; 161. an input tube; 162. a needle; 163. a seasoning box; 164. a water pump; 165. a third motor; 166. a push ring; 17. a material guide plate; 18. an adjusting plate; 181. a connecting rod; 182. a driven gear; 183. an outlet hole is formed; 184. a driving gear; 185. a second motor; 186. an inclined surface; 187. a knock bar; 188. an extension spring; 1881. connecting blocks; 1882. driving the rod; 1883. a second protrusion; 19. a silencing sleeve.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides an automatic equipment of pickling of beef, as figure 1 and figure 2, including

agitator tank

1, 1 upper end of agitator tank is equipped with the inlet pipe 11 that supplies to wait to pickle beef and get into, 11 cross sections of inlet pipe can be square, 1 outer wall lower extreme of agitator tank be equipped with agitator tank 1 in the discharging pipe 12 of intercommunication, discharging pipe 12 export is sealed through the closure piece, the closure piece can be for the rubber closure 121 who tightly is connected with the 12 inner walls of discharging pipe, the pickling of the 1 inside beef of agitator tank of being convenient for, be equipped with agitating unit in the agitator tank 1, be equipped with condiment input device in the inlet pipe.

As shown in the figures 1 and 2, the beef to be pickled is placed into the feeding pipe 11, at the moment, the seasoning input device in the feeding pipe 11 sprays seasoning on the beef to be pickled, the stirring device starts to work after the beef to be pickled enters the stirring box 1, so that the beef to be pickled and the seasoning are fully mixed, manual operation is reduced, the processing efficiency is high, the beef to be pickled is automatically pickled after entering the feeding pipe 11, and the labor cost is saved.

As shown in fig. 1 and fig. 2, the stirring device comprises a rotating shaft 13 rotatably connected to the bottom of the stirring box 1, the rotating shaft 13 is distributed along the height direction of the stirring box 1, a placing box 14 is arranged at the bottom of the stirring box 1, a box opening of the placing box 14 is welded on the bottom of the stirring box 1, the placing box 14 is used for supporting the stirring box 1, the rotating shaft 13 is driven by a first motor 141 fixed in the placing box 14, a plurality of stirring blades 15 located at the same height are circumferentially arranged on the outer wall of the rotating shaft 13, each stirring blade 15 located at the same height is one layer, the stirring blade 15 of one layer is uniformly provided with a plurality of layers along the length direction of the rotating shaft 13, and the length of each layer of stirring. At the moment, the length of the stirring blade 15 positioned at the upper end of the rotating shaft 13 is smaller, so that beef can enter the stirring box 1 conveniently, and the length of the stirring blade 15 at each layer is gradually lengthened along with the gradual entering of the beef, so that the beef can be stirred conveniently.

As shown in fig. 1 and fig. 2, two adjacent stirring vanes 15 are connected through an upright rod 151, the upright rod 151 is rotatably connected to the stirring vanes 15, the setting of the upright rod 151 increases the stirring direction of beef and the stirring efficiency, and a plurality of conical first protrusions 152 distributed in a staggered manner are circumferentially arranged on the outer wall of each upright rod 151, the contact area between the upright rod 151 and beef is increased due to the arrangement of the first protrusions 152, the upright rod 151 is rotatably connected, when the beef is stirred, the resistance is large, the upright rod 151 can rotate, and the upright rod 151 can conveniently penetrate between the adjacent beef blocks due to the arrangement of the first protrusions 152.

Referring to fig. 1 and 2, the seasoning input device includes a squeezing roller 16 with two ends rotatably connected to the opposite walls of a feeding pipe 11, a cavity is provided in the squeezing roller 16, an input pipe 161 coaxially disposed with the squeezing roller 16 is provided on the feeding pipe 11, the input pipe 161 is communicated with the cavity, a plurality of pointed spikes 162 are provided on the outer wall of the squeezing roller 16 in the circumferential direction, the spikes 162 can be conical or triangular hollow plates, the spikes 162 are hollow and extend into the cavity, a seasoning box 163 containing seasoning is connected to one end of the input pipe 161 located outside the feeding pipe 11, a water pump 164 is provided on the input pipe 161, at this time, the water pump 164 pumps the liquid seasoning in the seasoning box 163 into the input pipe 161, and then into the cavity in the squeezing roller 16 through the input pipe 161, and further contacts with beef entering the feeding pipe 11 through each spike 162, at this time, the spikes 162 are provided to facilitate entering the beef, seasoning is also conveyed into the beef, the horizontal gap between the outer wall of one side of the squeezing roller 16 and the inner wall of the feeding pipe 11 is the length of the pricking pin 162, the horizontal gap between the outer wall of the squeezing roller 16 and the inner wall of the feeding pipe 11 at the other side is used for the beef to enter the stirring box 1, the gap between the squeezing roller 16 and the feeding pipe 11 for the beef to fall conveniently cannot be too small to influence the beef to enter the stirring box 1 from the gap between the squeezing roller 16 and the feeding pipe 11 for the pricking pin 162 to enter the beef, as shown in fig. 4, the squeezing roller 16 is driven by a third motor 165 fixed on the outer wall of the stirring box 1, and the third motor 165 is arranged at one end of the squeezing roller 16 far away from the input pipe 161.

Referring to fig. 1 and 2, when beef is placed into the feed tube 11, the third motor 165 drives the squeeze roll 16 to rotate, at this time, since the input tube 161 is coaxial with the squeeze roll 16, the input tube 161 is not affected by inputting liquid seasoning into the squeeze roll 16, the water pump 164 pumps the liquid seasoning into the input tube 161 and through the cavity of the squeeze roll 16 to the respective puncture needles 162, at this time, after the beef enters from the feed tube 11, the beef is supported by the squeeze roll 16 and is driven by the puncture needles 162 to be transmitted toward the wall of the feed tube 11 until the beef is squeezed between the inner wall of the feed tube 11 and the outer wall of the squeeze roll 16, at this time, the puncture needles 162 are punctured into the beef and input seasoning into the beef, and as the squeeze roll 16 continues to rotate, the beef is transmitted from between the squeeze roll 16 and the inner wall of the feed tube 11 and falls into the mixing box 1, the beef is convenient for the next stirring work of the beef.

Referring to fig. 1 and 2, the inner wall of the stirring box 1 is provided with a material guide plate 17 for guiding the beef to the stirring device, and the material guide plate 17 is arranged to be inclined downwards from the inner wall of the stirring box 1. At the moment, the material guide plate 17 transmits the beef blocks and the seasonings to the position of the stirring device, so that the beef is stirred conveniently.

Referring to fig. 1 and 2, when beef is pricked by the pricking pin 162 and rotates to below the pressing roller 16, the beef slides down from the pricking pin 162 due to the gravity of the beef, but if the beef cannot slide down, the beef will affect the reuse of the pricking pin 162, so that a push ring 166 is sleeved outside the pricking pin 162, a connecting rope connected with the push ring 166 is arranged on the outer wall of the pressing roller 16, when the connecting rope is in a natural state, the push ring 166 is sleeved outside the pricking pin 162, and at this time, the push ring 166 moves along the length direction of the pricking pin 162 as the pressing roller 16 rotates, that is: when the needle 162 is upward in the needle point, the push ring 166 is abutted against the outer wall of the pressing roller 16 to support and penetrate beef, and when the needle 162 rotates with the pressing roller 16 until the needle point faces downward, the push ring 166 moves towards the needle point of the needle 162 to push the beef on the needle 162 to separate the beef from the needle 162.

Referring to fig. 1 and 2, in order to process beef with different thicknesses, an adjusting plate 18 parallel to the inner wall of the feeding pipe 11 is disposed on the inner wall of the feeding pipe 11, the adjusting plate 18 is located on the wall of the feeding pipe 11 on one side where beef enters the stirring tank 1 through the feeding pipe 11, a connecting rod 181 penetrating out of the outer wall of the feeding pipe 11 is rotatably connected to the adjusting plate 18, opposite two side edges of the adjusting plate 18 are both contacted with the inner wall of the feeding pipe 11, a driven gear 182 coaxial with the connecting rod 181 is rotatably connected to the outer wall of the feeding pipe 11, a penetrating hole 183 for the connecting rod 181, and the connecting rod 181 is in threaded connection with the hole wall of the penetrating hole 183 of the driven gear 182, in order to drive the driven gear 182 to rotate, therefore, the outer wall of the feeding pipe 11 is provided with a driving gear 184 engaged with the driven gear 182, the driving gear 184 is driven by a second motor 185 fixed on the outer wall of the feeding pipe 11, and the beef enters the stirring box 1 from the gap between the adjusting plate 18 and the outer wall of the squeezing roller 16. At this time, the second motor 185 drives the driving gear 184 to rotate, the driving gear 184 drives the driven gear 182 to rotate, so that the connecting rod 181 in threaded connection with the driven gear 182 rotates, the two opposite side edges of the adjusting plate 18 are both in contact with the inner wall of the feeding pipe 11, the rotation of the adjusting plate 18 is limited, the connecting rod 181 can move back and forth along the through hole 183 conveniently, the adjusting plate 18 can move towards the direction far away from or close to the extruding roller 16, the gap between the adjusting plate 18 and the extruding roller 16 is adjusted, and the beef with different thicknesses can be processed conveniently.

As shown in the figures 1 and 2, the discharging pipe 12 is distributed along the length direction of the stirring box 1, so that the beef outlet amount is increased, and a discharging part for discharging beef into the discharging pipe 12 is arranged in the stirring box 1. The discharge member facilitates the quick discharge of beef from the mixing tank 1.

As shown in fig. 2 and fig. 3, the discharging member includes an inclined surface 186 disposed at the bottom of the inner wall box of the stirring box 1, the higher end of the inclined surface 186 is disposed away from the discharging pipe 12, at this time, the inclined surface 186 facilitates the beef to be discharged to the discharging pipe 12 under the action of its own gravity, the outer wall of the rotating shaft of the first motor 141 is hinged with a plurality of knocking rods 187 in the circumferential direction, the bottom of the outer wall box of the stirring box 1 is provided with a tension spring 188 that enables one end of the knocking rod 187 away from the first motor 141 to abut against the bottom of the outer wall of the stirring box 1, the bottom of the stirring box 1 is connected with a connecting block 1881 in a sliding manner, the connecting block 1881 is connected to the bottom of the stirring box 1 along an arc line with the center line of the rotating shaft 13 in a sliding manner, one end of the tension spring 188 away from the knocking rod 187 is connected with the connecting block 1881, the rotating shaft of the, when the knocking rod 187 rotates, the driving rod 1882 drives the connecting block 1881 to slide at the bottom of the stirring box 1, so that the extension spring 188 also rotates along with the knocking rod 187, one end of the knocking rod 187 is abutted to the bottom of the stirring box 1, a plurality of arc-shaped second protrusions 1883 are arranged at the bottom of the outer wall of the stirring box 1 along the motion track of the knocking rod 187, when the first motor 141 drives the knocking rod 187 to rotate, the knocking rod 187 slides from one end of the second protrusions 1883 to the upper side of the second protrusions 1883 at one end abutted to the stirring box 1, the extension spring 188 is extended to have elastic restoring force, when the knocking rod 187 slides down from the second protrusions 1883, the extension spring 188 drives the knocking rod 187 to knock the bottom of the stirring box 1 again, so that beef bonded with the bottom of the stirring box 1 is better mixed with seasonings, and on the other hand, the stirred beef is convenient to be discharged from the bottom of the stirring box 1 to the discharging pipe 12.

As shown in fig. 2 and 3, the end of the knocking rod 187 abutting against the mixing box 1 is spherical and is sleeved with the noise reduction sleeve 19, the spherical shape facilitates the knocking rod 187 to move into the second protrusion 1883, and the noise reduction sleeve 19 reduces noise generated when the knocking rod 187 strikes the bottom of the mixing box 1.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides an automatic equipment of pickling of beef, characterized by: including agitator tank (1), agitator tank (1) upper end is equipped with the inlet pipe (11) that supply to wait to cure beef and get into, agitator tank (1) outer wall lower extreme is equipped with discharging pipe (12) with agitator tank (1) interior intercommunication, discharging pipe (12) export is sealed through the closure piece, be equipped with agitating unit in agitator tank (1), be equipped with condiment input device in inlet pipe (11).

2. The automatic beef curing equipment of claim 1, wherein: agitating unit is including rotating pivot (13) of connecting at agitator tank (1) bottom of the case, agitator tank (1) bottom of the case is equipped with places case (14), pivot (13) are driven by fixing first motor (141) in placing case (14), pivot (13) outer wall circumference is equipped with a plurality of stirring vane (15) that are located the same height, and each stirring vane (15) that are located the same height are the one deck, and one deck stirring vane (15) are followed pivot (13) length direction evenly is equipped with a plurality of layers, each layer stirring vane (15) are from last down length increase gradually.

3. The automatic beef curing equipment as claimed in claim 2, wherein: two adjacent from top to bottom connect through pole setting (151) between stirring vane (15), pole setting (151) are rotated and are connected on stirring vane (15), each pole setting (151) outer wall circumference is equipped with the first arch of the conical (152) of a plurality of dislocation distributions.

4. The automatic beef curing apparatus as claimed in claim 1, 2 or 3, wherein: the seasoning input device comprises a squeezing roller (16) with two ends rotatably connected to the opposite pipe wall of a feeding pipe (11), a cavity is arranged in the squeezing roller (16), an input pipe (161) coaxially arranged with the squeezing roller (16) penetrates through the feeding pipe (11), the input pipe (161) is communicated with the cavity, a plurality of pointed felting needles (162) are circumferentially arranged on the outer wall of the squeezing roller (16), the felting needles (162) are arranged in a hollow mode and extend into the cavity, one end, located outside the feeding pipe (11), of the input pipe (161) is connected with a seasoning box (163) filled with seasoning, a water suction pump (164) is arranged on the input pipe (161), the gap in the horizontal direction between the outer wall of one side of the squeezing roller (16) and the inner wall of the feeding pipe (11) is the length of the felting needles (162), and the horizontal gap between the outer wall of the squeezing roller (16) and the inner wall of the feeding pipe (, the squeezing roller (16) is driven by a third motor (165) fixed on the outer wall of the stirring box (1), and the third motor (165) is arranged at one end of the squeezing roller (16) far away from the input pipe (161).

5. The automatic beef curing equipment of claim 4, wherein: the beef mixer is characterized in that a material guide plate (17) for guiding beef to the mixing device is arranged on the inner wall of the mixing box (1), and the material guide plate (17) is arranged from the inner wall of the mixing box (1) in a downward inclined mode.

6. The automatic beef curing equipment of claim 4, wherein: the outer sleeve of the pricking pin (162) is provided with a push ring (166), the outer wall of the squeezing roller (16) is provided with a connecting rope connected with the push ring (166), and when the connecting rope is in a natural state, the push ring (166) is sleeved outside the pricking pin (162).

7. The automatic beef curing equipment of claim 4, wherein: an adjusting plate (18) parallel to the inner wall of the feeding pipe (11) is arranged on the inner wall of the feeding pipe (11), the adjusting plate (18) is rotatably connected with a connecting rod (181) penetrating out of the outer wall of the feeding pipe (11) and two opposite side edges of the adjusting plate (18) are contacted with the inner wall of the feeding pipe (11), the outer wall of the feeding pipe (11) is rotationally connected with a driven gear (182) which is coaxial with the connecting rod (181), the driven gear (182) is provided with a through hole (183) for the connecting rod (181) to pass through, the connecting rod (181) is in threaded connection with the driven gear (182), the outer wall of the feeding pipe (11) is provided with a driving gear (184) meshed with the driven gear (182), the driving gear (184) is driven by a second motor (185) fixed on the outer wall of the feeding pipe (11), and the beef enters the stirring box (1) from a gap between the adjusting plate (18) and the outer wall of the squeezing roller (16).

8. The automatic beef curing equipment as claimed in claim 2, wherein: discharging pipe (12) just along agitator tank (1) length direction distribution be equipped with in agitator tank (1) and arrange the discharge piece in discharging pipe (12) with beef.

9. The automatic beef curing equipment of claim 8, wherein: the discharging part comprises an inclined surface (186) arranged at the bottom of an inner wall box of the stirring box (1), the higher end of the inclined surface (186) is far away from the discharging pipe (12), the outer wall of a rotating shaft of the first motor (141) is circumferentially hinged with a plurality of knocking rods (187), the bottom of the outer wall box of the stirring box (1) is provided with a tension spring (188) which enables one end of each knocking rod (187) far away from the first motor (141) to be abutted against the bottom of the outer wall of the stirring box (1), the bottom of the stirring box (1) is connected with a connecting block (1881) in a sliding manner, the connecting block (1881) is connected to the bottom of the stirring box (1) in a sliding manner along an arc line taking the central line of the rotating shaft (13) as the circle center, one end of each tension spring (188) far away from each knocking rod (187) is connected with the connecting block (1881), a driving rod (1882) connected with the connecting block (1881) is arranged on the rotating shaft of the first, and a plurality of arc-shaped second protrusions (1883) are arranged at the bottom of the outer wall of the stirring box (1) along the motion track of the knocking rod (187).

10. The automatic beef curing equipment of claim 9, wherein: one end of the knocking rod (187) abutting against the stirring box (1) is spherical, and a silencing sleeve (19) is sleeved outside the knocking rod.