CN109012871B

CN109012871B - Low-temperature freezing grinder

Info

Publication number: CN109012871B
Application number: CN201810801369.0A
Authority: CN
Inventors: 谭贺洵; 贺春扬; 樊腾飞
Original assignee: Quanzhou Taishang Investment Zone Changsi Industrial Design Co ltd
Current assignee: Quanzhou Taishang investment zone Changsi Industrial Design Co.,Ltd.
Priority date: 2018-07-20
Filing date: 2018-07-20
Publication date: 2020-10-16
Anticipated expiration: 2038-07-20
Also published as: CN109012871A

Abstract

The invention provides a low-temperature freezing grinder which comprises a cooling mechanism, a grinding mechanism, a push rod mechanism and a material pipeline arranged in the cooling mechanism, wherein a support rod capable of movably stretching is arranged on the push rod mechanism, the material pipeline comprises a support rod branch, a feeding branch and a discharging branch, the support rod branch, the feeding branch and the discharging branch are communicated with each other, one end of the support rod branch penetrates out of the cooling mechanism, the support rod branch and the discharging branch are arranged in a straight line, the feeding branch is arranged upwards and forms an included angle with the straight line, and the support rod is movably inserted into the support rod branch; one end part of the discharging branch is arranged right above the grinding feeding end of the grinding mechanism; the grinding discharge end of the grinding mechanism is provided with a collecting mechanism for collecting ground materials. The grinder provided by the invention not only grinds materials to be in a fine state, but also can ensure that the phenomenon of explosion can not occur in the grinding process.

Description

Low-temperature freezing grinder

Technical Field

The invention relates to the technical field of paint production, in particular to a low-temperature freezing grinder.

Background

The grinding and dispersing equipment is the main equipment in the production process of powder materials and generally is divided into two types, one is grinding medium (also called dispersing medium) with free movement, and the other is grinding medium-free, and the equipment mainly depends on the grinding and dispersing by using the lapping force. The material ground by the grinding and dispersing equipment without grinding media commonly used in the actual production is mostly not fine enough and not uniform enough. In the prior art, the materials are frozen by liquid nitrogen and then crushed, so that the particles of the materials are finer and finer, and the grinding time is shortened. However, in the freezing process, liquid nitrogen and materials need to be mixed together to realize freezing, a great amount of liquid nitrogen is needed in the operation process, the liquid nitrogen is gasified into nitrogen gas due to temperature rise in subsequent grinding and crushing operation, and the volume of the liquid nitrogen is rapidly expanded by 180 times. If the grinding or milling is carried out in a closed space, the closed space may explode, which not only affects the personal safety of workers, but also affects the performance of the production operation.

Disclosure of Invention

The invention provides a low-temperature freezing grinder aiming at the defects of the prior art, which not only grinds materials to be in a fine state, but also can ensure that the phenomenon of explosion cannot occur in the grinding process.

The invention provides a low-temperature freezing grinder which comprises a cooling mechanism, a grinding mechanism, a push rod mechanism and a material pipeline arranged in the cooling mechanism, wherein a support rod capable of movably stretching is arranged on the push rod mechanism, the material pipeline comprises a support rod branch, a feeding branch and a discharging branch, the support rod branch, the feeding branch and the discharging branch are communicated with each other, one end of each support rod branch penetrates out of the cooling mechanism, the support rod branch and the discharging branch are arranged in a straight line, the feeding branch is arranged upwards and forms an included angle with the straight line, and the support rod is movably inserted into the support rod branch; one end part of the discharging branch is arranged right above the grinding feeding end of the grinding mechanism; the grinding discharge end of the grinding mechanism is provided with a collecting mechanism for collecting ground materials.

Further, the cooling mechanism comprises a storage vessel and a cooling cavity arranged inside the storage vessel, a cooling liquid inlet communicated with the cooling cavity and a material inlet communicated with the feeding branch are formed in the upper portion of the storage vessel, and the cooling liquid inlet is not communicated with the material inlet.

Furthermore, a support rod valve, a feeding valve and a discharging valve are correspondingly arranged on the parts of the support rod branch, the feeding branch and the discharging branch which penetrate out of the cooling mechanism; the branch rod is arranged on the outer side of the branch rod valve, and when the branch rod valve is opened, the branch rod can penetrate through the branch rod valve to move towards the direction of the discharging branch.

Further, the push rod mechanism comprises a push rod driving mechanism, a connecting seat and a sleeve part movably connected with the connecting seat, and one end of the supporting rod is fixedly connected with the connecting seat; the push rod driving mechanism drives the connecting seat to move forwards or backwards along the sleeve part towards the direction of the discharge valve.

Furthermore, a drill bit is fixedly arranged at the other end of the supporting rod, and the diameter of the drill bit is smaller than that of the supporting rod branch and that of the discharging branch.

Further, grind the mechanism including grinding actuating mechanism, having grind the last mill of feed end, the lower mill of fixed setting, the last mill with lower mill is the butt from top to bottom, grind actuating mechanism can drive the last mill is in rotate on the lower mill.

Furthermore, a pin shaft penetrating through the center of the lower grinding disc is arranged at the center of the lower grinding disc, a first mounting hole matched with the pin shaft is arranged at the center of the upper grinding disc, the upper portion of the pin shaft is fixedly connected with the first mounting hole, the middle portion of the pin shaft is movably connected with the lower grinding disc, and the lower portion of the pin shaft is connected with the grinding driving mechanism.

Further, the grinding feed end at least comprises a feed hole penetrating through the upper grinding disc, and the feed hole is arranged on one side of the first mounting hole.

Further, the grinder also comprises a controller and a timer which is in communication connection with the controller, and the controller is also electrically connected with the push rod driving mechanism.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, the material pipeline is arranged in the cooling mechanism, so that the material and the liquid nitrogen are separated, the material in the material pipeline can be cooled under the cooling effect of the liquid nitrogen, and the liquid nitrogen can be prevented from being gasified in a large amount, so that accidents can be prevented.

2. According to the invention, the upper grinding disc and the upper grinding disc are tightly attached and relatively rotate, the cooled material is fed from the feeding hole of the upper grinding disc and is gradually ground to the edge to be discharged under the action of centrifugal force, so that the material can be fully pressed and ground, and the fineness of the powder material is ensured.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Description of reference numerals:

1-a cooling mechanism; 11-a storage vessel; 12-a cooling chamber; 13-coolant inlet; 14-material inlet; 2-a grinding mechanism; 21-grinding driving mechanism; 22-upper grinding disc; 221-a feed port; 222-a mounting groove; 223-transverse through hole; 224 — a second mounting hole; 23-lower grinding disc; 24-a pin shaft; 25-horizontal axis; 3-a push rod mechanism; 31-a connecting seat; 32-a sleeve portion; 33-a strut; 4-branch of strut; 5-feeding branch; 6-a discharge branch; 7-collecting mechanism.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1, the cryogenic grinding machine comprises a cooling mechanism 1 and a grinding mechanism 2, and further comprises a push rod mechanism 3 and a material pipeline arranged inside the cooling mechanism 1, wherein the push rod mechanism 3 and the grinding mechanism 2 are respectively arranged on the left side and the right side of the cooling mechanism 1. And one side of the push rod mechanism 3 close to the cooling mechanism 1 is provided with a support rod 33 capable of movably extending and retracting. The material pipeline comprises a branch 4, a feeding branch 5 and a discharging branch 6 which are communicated with each other, and the branch 4, the feeding branch 5 and the discharging branch 6 respectively extend outwards from the communicated positions to penetrate out of the cooling mechanism 1. The branch rod 4 and the discharge branch 6 are arranged in a straight line, and the inner diameters of the branch rod and the discharge branch are the same. The feeding branch 5 is vertically upwards arranged and forms an included angle with the straight line, and a funnel-shaped feeding hole is formed in the part of the cooling mechanism 1, so that feeding is facilitated. One end of the strut 33 is movably inserted into the strut branch 4 and can move back and forth along the axial directions of the strut branch 4 and the discharging branch 6. The branch strut 4 and the branch discharge 6 may be arranged horizontally or obliquely, and in the embodiment of the invention, the branch strut is preferably arranged obliquely downwards. Specifically, the end part of one end, far away from the branch 4, of the discharge branch 6 is arranged above the grinding mechanism 2, so that materials can fall into the grinding feed end of the grinding mechanism 2 from the end part conveniently. Grind mechanism 2's grinding discharge end department and be equipped with the collection mechanism 7 that is used for collecting the material after grinding, collect mechanism 7 can be for along grind the collecting vat that mechanism 2 set up all around or can save the storage utensil of material.

The cooling mechanism 1 preferably adopts liquid nitrogen cooling, specifically, the cooling mechanism 1 comprises a storage vessel 11 capable of preserving heat and a cooling cavity 12 arranged in the storage vessel 11 and used for storing liquid nitrogen, the upper part of the storage vessel 11 is provided with a cooling liquid inlet 13 communicated with the cooling cavity 12 and a material inlet 14 communicated with the feeding branch 5, and the cooling liquid inlet 13 is not communicated with the material inlet 14. That is, the material pipe is disposed in the cooling cavity 12 and is not communicated with the cooling cavity 12. The material pipe is preferably made of a thin, non-insulated metal material, such as aluminum or iron. Two vertical through holes are formed in the top of the storage vessel 11, and one end, far away from the supporting rod branch 4, of the feeding branch 5 penetrates through one of the vertical through holes and is communicated with the outside; the other of said vertical perforations is a cooling liquid inlet 13. The left side and the right side of the storage vessel 11 are respectively provided with a transverse through hole, and the support rod branch 4 and the discharging branch 6 correspondingly penetrate through the two transverse through holes respectively and are communicated with the outside. Liquid nitrogen enters the cooling cavity 12 from the cooling liquid inlet 13, and at least a part of the strut branch 4 and the discharge branch 6 of the material pipeline are soaked in the cooling liquid, preferably most of the strut branch is soaked in the cooling liquid.

The branch 4, the feeding branch 5 and the discharging branch 6 penetrate out of the storage vessel 11 of the cooling mechanism 1, and a branch valve, a feeding valve and a discharging valve are correspondingly arranged on the parts. The supporting rod 33 is arranged on the outer side of the supporting rod valve, and when the supporting rod valve is opened, the supporting rod 33 can penetrate through the supporting rod valve to move towards the discharging branch 6. When the cooling mechanism 1 feeds materials, the support rod valve and the discharge valve are controlled to be closed while the feeding valve is kept open. When the strut valve is closed, the strut 33 is just outside the strut valve. And the material enters the material pipeline from the feeding valve, and when the material starts to be filled from the inner side of the discharging valve to a position which is flush with the lower part of the feeding branch pipe 5, the feeding is stopped and the feeding valve is closed. At the moment, the material in the material pipeline is gradually frozen to be solid under the cooling effect of the cooling liquid.

The push rod mechanism 3 comprises a push rod driving mechanism (not shown in the figures), a connecting seat 31 and a sleeve part 32 movably connected with the connecting seat 31, and one end of the supporting rod 33 is fixedly connected with the connecting seat 31; the push rod driving mechanism drives the connecting seat 31 to move forward or backward along the sleeve portion 32 toward the discharge valve. The sleeve portion 32 is of sufficient axial length that the forward end of the rod 33 reaches the discharge valve when the rod 33 is advanced to its maximum distance, ensuring that all solid material frozen in the material conduit is pushed out of the discharge valve. Preferably, the connecting seat 31 is in threaded connection with the sleeve portion 32, and a drill bit is fixedly arranged at the front end of the strut 33, and the diameters of the drill bit are smaller than those of the strut branch 4 and the discharge branch 6. The push rod driving mechanism drives the connecting seat 31 to spirally advance or spirally retreat in the sleeve part 32 to drive the supporting rod 33 and the drill bit thereon to rotate together, so that all frozen materials can be easily crushed, and the materials can be conveniently discharged from the discharge valve. In order to facilitate that the crushed materials can be automatically discharged from the discharge valve, the branch rod 4 and the discharge branch 6 are arranged in a downward inclination manner, that is, the height of the branch rod 4 is higher than that of the discharge branch 6, and the crushed materials automatically move towards the discharge valve under the action of gravity.

The grinding mechanism 2 comprises a grinding driving mechanism 21, an upper grinding disc 22 with a grinding feeding end and a lower grinding disc 23 fixedly arranged, the upper grinding disc 22 and the lower grinding disc 23 are in vertical butt joint, and the grinding driving mechanism 21 can drive the upper grinding disc 22 to rotate on the lower grinding disc 23. In the process that the upper grinding disc 22 rotates relative to the lower grinding disc 23, materials falling between the upper grinding disc 22 and the lower grinding disc 23 can be ground and crushed, in order to enable the materials to be ground more finely, two surfaces, abutted to each other, of the upper grinding disc 22 and the lower grinding disc 23 are grinding surfaces, the two grinding surfaces are both arranged to be rugged rough surfaces, the materials are ground very finely through the relative rotation of the upper rough surface and the lower rough surface, and the grinding quality of the materials is improved. Specifically, a pin shaft 24 penetrating through the center of the lower grinding disc 23 from the upper side surface and the lower side surface is arranged at the center of the lower grinding disc 23, a first mounting hole matched with the pin shaft 24 is arranged at the center of the upper grinding disc 22, the upper portion of the pin shaft 24 is fixedly connected with the first mounting hole, the middle portion of the pin shaft 24 is movably connected with the middle portion of the lower grinding disc 23, and the lower portion of the pin shaft 24 is fixedly connected with the grinding driving mechanism 21. The grinding driving mechanism 21 is preferably a motor, a speed reducer can be arranged between the pin shaft 24 and the motor, and the rotating speed of the upper grinding disc 22 is reduced through the speed reducer, so that materials can fall into the grinding surface from the grinding feeding end better. A second mounting hole with a transverse opening is formed in the connecting portion of the pin shaft 24 and the upper grinding disc 22, correspondingly, a transverse third mounting hole matched with the second mounting hole is formed in the upper grinding disc 22, and the second mounting hole and the third mounting hole are coaxial. Specifically, the third mounting hole extends from the center of the upper grinding disc 22 to two symmetrical side edges, wherein the extending distance of one side is shorter, so as to form a mounting groove 222 with a certain transverse depth; the other side extends for a longer distance and directly penetrates out of the edge of the upper grinding disc 22 to form a transverse through hole 223 communicated with the outside. The mounting groove 222 and the transverse through hole 223 are coaxial. The upper grinding disc 22 and the pin shaft 24 are detachably connected through a transverse shaft 25 sequentially inserted into the transverse through hole 223, the second mounting hole 224 and the mounting groove 222. One end of the transverse shaft 25 is clamped in the mounting groove 222, and the other end protrudes out of the upper grinding disc 22. The present embodiment connects the grinding driving mechanism 21 and the upper grinding disc 22 fixedly in the above-mentioned manner. When the grinding driving mechanism 21 drives the pin shaft 24 to rotate, the pin shaft 24 drives the upper grinding disc 22 to rotate, and at the moment, the pin shaft 24 is movably connected with the lower grinding disc 23 relatively. The grinding feed end at least comprises a feed hole 221 penetrating through the upper grinding disc 22, and the feed hole 221 is arranged on one side of the first mounting hole and corresponds to the end part, far away from the feed branch 5, of the discharge branch 6 up and down. In this embodiment, a plurality of feeding holes 221 are preferably provided, and a plurality of feeding holes 221 are uniformly distributed on the upper grinding disc 22 centering on the pin shaft 24. Specifically, the upper portion of the feeding hole 221 is arranged to be a funnel shape with a large opening facing upwards, and the lower portion of the feeding hole 221 is arranged to be a straight tube shape with a smaller diameter, so that material feeding is facilitated.

The grinder also includes a controller, a timer in communicative connection with the controller. And when the timing time of the timer is equal to the preset time which is preset, sending a time reaching signal to the controller. And when the controller receives the time reaching signal, the controller controls the corresponding component to execute the corresponding action. Specifically, the controller is electrically connected to the push rod driving mechanism and the grinding driving mechanism 21, respectively. In order to realize automation, the controller is also respectively in communication connection with the feeding valve, the supporting rod valve and the discharging valve. When necessary, the controller can control the start and stop of the push rod driving mechanism or the grinding driving mechanism 21 and correspondingly control the opening and closing of the feeding valve, the supporting rod valve and the discharging valve.

The working principle is as follows: before the cooling means 1 is fed, the cooling chamber 12 is filled with sufficient liquid nitrogen. When the cooling mechanism 1 feeds, the controller controls the feeding valve to be opened, the supporting rod valve and the discharging valve are both in a closed state, materials enter the material pipeline from the feeding valve and are filled in the discharging branch 6 and the supporting rod branch 4, and after the feeding is completed, the controller controls the feeding valve to be closed and controls the timer to start timing. And when the timing time of the timer is equal to the preset time which is preset, sending a time reaching signal to the controller. And when the controller receives the time reaching signal, the controller controls the strut valve and the discharge valve to be opened simultaneously. At this time, the controller controls the push rod driving mechanism and the grinding driving mechanism 21 to be started simultaneously. The push rod driving mechanism drives the connecting seat 31 to drive the supporting rod 33 to rotate and advance towards the direction of the discharging valve until the front end of the supporting rod 33 reaches the position of the discharging valve. In the process, the support rod 33 crushes and pushes the material frozen into solid by liquid nitrogen to the outside of the discharging valve through the drill bit on the support rod, and the discharging of the cooling mechanism 1 is finished. The frozen material is discharged from the discharging branch 6, falls onto the feeding hole 221 of the rotating upper grinding disc 22, and falls onto the plane where the upper grinding disc 22 and the lower grinding disc 23 abut against each other through the feeding hole. In the rotation process of the upper grinding disc 22, the upper grinding disc 22 rotates and grinds the material, so that the material is rapidly ground. The ground material moves towards the edges of the upper grinding disc 22 and the lower grinding disc 23 under the action of centrifugal force until falling into the collecting mechanism 7, and the grinding operation is completed.

The low-temperature freezing grinder can grind most of materials needing grinding, and is particularly suitable for grinding powder coatings. According to the invention, the material pipeline is arranged in the cooling mechanism, so that the material and the liquid nitrogen are separated, the material in the material pipeline can be cooled under the cooling effect of the liquid nitrogen, and the liquid nitrogen can be prevented from being gasified in a large amount, so that accidents can be prevented. In addition, the invention adopts a mode that the upper grinding disc is tightly attached to the upper grinding disc and relatively rotates, the cooled material is fed from the feeding hole of the upper grinding disc and is gradually ground to the edge to be discharged under the action of centrifugal force, so that the material can be fully pressed and ground, and the fineness of the powder material is ensured.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a cryogenic grinder that freezes, includes cooling body and grinds mechanism, its characterized in that: the cooling device comprises a cooling mechanism, a push rod mechanism and a material pipeline arranged in the cooling mechanism, wherein the push rod mechanism is provided with a support rod capable of movably stretching, the material pipeline comprises a support rod branch, a feeding branch and a discharging branch which are communicated with each other, one end of each support rod branch penetrates out of the cooling mechanism, the support rod branch and the discharging branch are arranged in a straight line, the feeding branch is arranged upwards and forms an included angle with the straight line, and the support rod is movably inserted into the support rod branch; one end part of the discharging branch is arranged right above the grinding feeding end of the grinding mechanism; a collecting mechanism for collecting ground materials is arranged at the grinding discharge end of the grinding mechanism;

the cooling mechanism comprises a storage vessel and a cooling cavity arranged in the storage vessel, the upper part of the storage vessel is provided with a cooling liquid inlet communicated with the cooling cavity and a material inlet communicated with the feeding branch, the cooling liquid inlet and the material inlet are not communicated with each other, the top of the storage vessel is provided with two vertical through holes, and one end of the feeding branch, which is far away from the supporting rod branch, penetrates through one of the vertical through holes and is communicated with the outside; the other vertical through hole is a cooling liquid inlet; the left side and the right side of the storage vessel are respectively provided with a transverse through hole, and the support rod branch and the discharge branch correspondingly penetrate through the two transverse through holes and are communicated with the outside;

the push rod mechanism comprises a push rod driving mechanism, a connecting seat and a sleeve part movably connected with the connecting seat, and one end of the supporting rod is fixedly connected with the connecting seat; the push rod driving mechanism drives the connecting seat to move forwards or backwards along the sleeve part towards the direction of the discharge valve.

2. A cryogenic grinder as claimed in claim 1, wherein: a support rod valve, a feeding valve and a discharging valve are correspondingly arranged on the parts of the support rod branch, the feeding branch and the discharging branch, which penetrate out of the cooling mechanism; the branch rod is arranged on the outer side of the branch rod valve, and when the branch rod valve is opened, the branch rod can penetrate through the branch rod valve to move towards the direction of the discharging branch.

3. A cryogenic grinder as claimed in claim 1, wherein: and a drill bit is fixedly arranged at the other end of the supporting rod, and the diameter of the drill bit is smaller than that of the supporting rod branch and that of the discharging branch.

4. A cryogenic grinder as claimed in claim 1, wherein: the grinding mechanism comprises a grinding driving mechanism, an upper grinding disc with a grinding feeding end and a fixedly arranged lower grinding disc, the upper grinding disc and the lower grinding disc are in vertical butt joint, the grinding driving mechanism can drive the upper grinding disc to rotate on the lower grinding disc, two abutted surfaces of the upper grinding disc and the lower grinding disc are grinding surfaces, and the two grinding surfaces are both provided with rugged rough surfaces; the grinding device comprises a lower grinding disc, a grinding driving mechanism, a grinding feeding end and a grinding feeding end, wherein a pin shaft penetrating through the center of the lower grinding disc is arranged at the center of the lower grinding disc, a first mounting hole matched with the pin shaft is arranged at the center of the upper grinding disc, the upper part of the pin shaft is fixedly connected with the first mounting hole, the middle part of the pin shaft is movably connected with the lower grinding disc, the lower part of the pin shaft is connected with the grinding driving mechanism, the grinding feeding end at least comprises a feeding hole penetrating through the upper grinding disc, and the feeding hole is arranged on one; the grinder also comprises a controller and a timer which is in communication connection with the controller, and the controller is also electrically connected with the grinding driving mechanism.