CN106807302B - Conical mixer discharge valve with spherical support - Google Patents
Conical mixer discharge valve with spherical support Download PDFInfo
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- CN106807302B CN106807302B CN201510853677.4A CN201510853677A CN106807302B CN 106807302 B CN106807302 B CN 106807302B CN 201510853677 A CN201510853677 A CN 201510853677A CN 106807302 B CN106807302 B CN 106807302B
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- discharge valve
- mixer
- spherical support
- screw shaft
- thimble
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- 238000007789 sealing Methods 0.000 claims abstract description 33
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- 239000004677 Nylon Substances 0.000 claims description 20
- 229920001778 nylon Polymers 0.000 claims description 20
- 230000007704 transition Effects 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
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- 239000000463 material Substances 0.000 abstract description 29
- 238000007599 discharging Methods 0.000 abstract description 14
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- 240000000233 Melia azedarach Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
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- Multiple-Way Valves (AREA)
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Abstract
The invention discloses a conical mixer discharge valve with a spherical support, which comprises a discharge valve body and a spherical support structure arranged in a central cavity of the discharge valve body, wherein the discharge valve body comprises a discharge valve static plate, a discharge valve moving plate and a discharge valve compression ring; the static sheet of the discharge valve and the moving sheet of the discharge valve are conical surfaces of an upper arch, and the moving sheet of the discharge valve is parallel to the bottom surface of the propeller. The invention can not only finish the support of the screw shaft and improve the stress state of the screw shaft, has strong sealing strength, but also can well prevent the problem that the quality is affected due to spiral dead angle generated between the bottom of the conical mixer and the discharge valve when the screw shaft rotates in a long way, improves the discharging speed of the material and the spraying leakage between the valve plates during discharging, is convenient to clean, and has wide application prospect in a large-scale conical mixer.
Description
Technical Field
The invention relates to a conical mixer discharge valve with a spherical support.
Background
At present, planetary conical mixing equipment is divided into a single-spiral conical mixer, a double-spiral conical mixer and a triple-spiral conical mixer according to the number of spirals.
The conical single-screw mixer is characterized in that a screw shaft penetrating up and down is designed in a mixing equipment cylinder along a bus of the conical cylinder, a group of solid screw blades are arranged on the screw shaft, the material is driven to move up and down by the rotation of the blades, the screw shaft rotates around the central shaft of the conical cylinder (called autorotation) and simultaneously also surrounds the central shaft of the conical cylinder, and planetary motion (called revolution) is carried out near the wall surface of the cone by means of the rotation of a rotating arm. The conical single-screw mixer makes the materials generate compound motion in the cone by means of revolution and autorotation of the screw shaft, thereby achieving the purpose of uniform mixing. The direction of the spiral rotation makes the material move from the bottom of the cone to the top of the cone to be in a positive direction.
The conical double-screw mixer is divided into a symmetrical double-screw mixer and an asymmetrical double-screw mixer. One is designed with a screw shaft penetrating up and down along the bus of the conical cylinder and the other is added with a short screw shaft. The working principle of the conical symmetrical and asymmetrical double-screw-shaft mixer is identical to that of the conical single-screw mixer. The conical double-screw mixer makes the materials produce composite motion in the cone by means of revolution and autorotation of two screws, so as to achieve the aim of uniform mixing.
The conical triple-screw mixer is a symmetrical double-screw mixer, wherein a screw shaft penetrating through the upper part and the lower part is additionally arranged at the middle axis part, and solid screws are distributed at the middle part and the lower part. The middle screw lifts the material to the layer of the double screw bottom, and then the double screw completes the mixing of the upper material layer of the cylinder. The two symmetrical spirals have the same rotation direction and are respectively distributed on two sides of the cylinder body and are opposite to the rotation direction of the middle spiral, but the three spirals are used for lifting materials from the bottom of the cone to the top of the cone.
Through long-term experience of use, the conical mixing equipment has the advantages of high mixing efficiency and uniformity, wide application and relatively good economical efficiency. However, in a large conical mixer vessel, since the screw shaft is long and generally has a cantilever structure, the screw shaft is easily bent and deformed when receiving a large stirring force, and thus the apparatus is disabled or destroyed. For the technical problem, if a supporting structure is arranged on the discharge valve at the bottom of the large-scale conical mixer, the long screw shaft is supported at two ends, and the stress state and the maximum deformation position of the long screw shaft are changed, the long screw shaft can be subjected to smaller bending deformation when being subjected to larger stirring force.
The existing conical mixer discharge valve with the supporting structure can effectively protect the long screw shaft from bending deformation, but the distance between the bottom of the long screw shaft and the discharge valve is larger, spiral dead angles are easy to generate, and the accumulation amount of materials between the bottom of the long screw shaft and the discharge valve is overlarge; the sealing element in the sealing element has poor effect, and a compressed gas pipeline is required to be built in, so that the compressed gas and the sealing element form combined sealing, and the manufacturing and using cost is increased; in addition, the thimble part is mainly of a fixed structure, so that errors generated in manufacturing and assembling of the ejection valve are difficult to compensate in the using process after the manufacture is finished, and the sealing is ensured by adopting an O-shaped sealing ring among a static sheet of the ejection valve, a moving sheet of the ejection valve and a compression ring of the ejection valve, but the opening and closing of the ejection valve are laborious. After the O-shaped sealing ring is worn, spraying leakage can occur between valve plates during discharging.
Disclosure of Invention
The invention aims to solve the technical problems that the existing conical mixer discharge valve is easy to accumulate materials due to spiral dead angles, has higher manufacturing and using costs, is difficult to compensate errors after being put into use, is inflexible to open, and has spraying leakage among valve plates during discharging after an O-shaped sealing ring fails, and the like, and provides the conical mixer discharge valve with the spherical support.
The invention solves the technical problems by the following technical proposal:
The discharge valve comprises a discharge valve body and a spherical supporting structure arranged in a central cavity of the discharge valve body, wherein the discharge valve body comprises a discharge valve static plate, a discharge valve moving plate and a discharge valve pressing ring; the automatic feeding device is characterized in that the static piece of the discharge valve and the moving piece of the discharge valve are both conical surfaces of an upper arch so as to prevent excessive accumulation of materials between the bottom of the long screw shaft and the discharge valve and spiral dead angles during revolution and autorotation of the long screw shaft and ensure the rigidity and strength of the static piece of the discharge valve, and the moving piece of the discharge valve is parallel to the bottom surface of the screw propeller.
Preferably, the upper arch angle of the conical surface is 8 degrees, the cone angle of the conical surface is 164 degrees, the included angle between the bottom surface of the screw propeller and the screw shaft is 81 degrees, and each angle forms a dimension chain of the discharge valve moving plate parallel to the bottom surface of the screw propeller; the distance between the moving plate of the discharge valve and the bottom surface of the screw propeller is 9-10mm, so that the material accumulation between the discharge valve and the screw shaft and between the discharge valve and the screw propeller is reduced, and the rigidity and strength of the static plate of the discharge valve are enhanced.
Preferably, the transition gap between the movable sheet of the discharge valve and the static sheet of the discharge valve is 2mm, and the transition gap between the compression ring of the discharge valve and the movable sheet of the discharge valve is 2mm. The transition gap is controlled in the processing of the static sheet of the discharge valve, the gap between the static sheet of the discharge valve and the pressure ring of the discharge valve, and is matched with the thickness of the nylon cushion.
Preferably, nylon gasket mounting grooves are formed in the outer edges of the discharge valve static piece and the discharge valve moving piece, and nylon gasket sealing is adopted between the discharge valve static piece and the discharge valve moving piece and between the discharge valve moving piece and the discharge valve pressing ring. Because the nylon pad is harder and is not easy to deform, under the condition of strictly controlling the depth of the groove, the gap between the discharge valve compression ring and the discharge valve static piece and the gap between the discharge valve static piece and the discharge valve dynamic piece are smaller than the thickness of the nylon pad by 0.10mm, so that the nylon pad is just contacted to form 'light contact', the discharge valve is opened and closed flexibly and easily, and the material leakage is prevented.
Preferably, the section of the nylon pad is a right trapezoid, the upper part of the right trapezoid is a bevel edge, the inner ring of the right trapezoid is a long edge, and the top of the right trapezoid is in rounded transition. The upper part of the nylon cushion is inclined outwards by a bevel edge, the uppermost circular arc is in transition, and the generated contact surface is smaller; the pressure generated by the light contact is small, the nylon cushion is harder, and the friction coefficient is small, so that the generated friction force is small, and the effect of flexibly opening and closing the discharge valve is achieved. When the nylon cushion is used for a period of time, the interference is ground, but the material valve compression ring and the discharge valve static piece and the discharge valve moving piece are still in light contact, so that the effect of preventing the material leakage is achieved.
Preferably, the spherical supporting structure comprises a thimble ball, a bearing seat and a thimble shaft arranged in the bearing seat, wherein the center of the thimble ball is at the intersection point of the spiral shaft and the main shaft of the conical mixer, if the position of the center of the thimble ball deviates greatly, the other end of the spiral shaft can generate larger bending force, so that the bearing or the shaft is subjected to larger bending force, and the rear shaft of the bearing is damaged. In addition, the thickness of the discharge valve compression ring and the gasket between the bottom cone flanges are adjusted according to the center position of the thimble ball. When in assembly, after the center of the thimble ball is positioned at the intersection point of the screw shaft and the main body shaft of the conical mixer, the thickness dimension of the compression ring of the discharge valve is obtained to be processed so as to meet the requirement; if the thickness is insufficient, the gasket between the bottom cone flanges can be changed to meet the requirement.
Preferably, the thimble ball is fixed on a support tile body supported by the bearing, and the support tile body comprises a support tile and a tetrafluoro ball support. The supporting tile body formed by the thimble ball, the supporting tile and the tetrafluoro ball support is relatively motionless during revolution, so that the abrasion of the spherical universal thimble support along with the revolution of the long screw shaft along the conical wall is prevented.
Preferably, the upper part of the thimble ball is sealed with the static piece of the discharge valve through a combination of a compression ring, a disc spring and an O-shaped sealing ring; the clamping ring is arranged at the upper part of the thimble ball through embedding and pressing, and the pair of disc springs are arranged on the clamping ring back to back, so that the clamping force can be always generated between the clamping ring and the thimble ball; the static plate of the discharge valve is provided with an O-shaped groove, and the O-shaped sealing ring is arranged on the O-shaped groove to ensure that the compression ring does not leak materials into the bearing of the lower part.
Preferably, bearings are arranged at two ends of the thimble shaft, and an outer ring of the bearings is connected with the bearing seat; the bearing seat is fixed inside the screw shaft through a compression bolt. The bottom thimble ball and the long screw shaft do not rotate at the same time, and do not rotate, and only revolution along the conical wall along with the long screw shaft is generated, or the thimble shaft does not rotate when the screw shaft rotates, so that the bottom spherical universal thimble support is prevented from being worn rapidly. The relative movement and friction is essentially borne by the bearings. The characteristics of small rotation friction of the bearing, high hardness of the bearing and good wear resistance are fully utilized.
Preferably, a sliding groove is arranged on the outer side of the bearing seat, the position of the whole assembly can slide in the screw shaft, the position of the thimble ball is adjusted, the root of the bearing seat is combined and sealed with the oil seal through a spring tension sealing ring for the shaft, the spring tension sealing ring for the shaft is a one-way seal composed of a metal cantilever spring and a filled polytetrafluoroethylene sealing sleeve which is processed mechanically, the sealing performance is good, and pollutants can be effectively prevented from entering.
Preferably, the support tile, the tetrafluoro ball support and the compression ring are all made of polytetrafluoroethylene, the O-shaped sealing ring is a standard component, and the material is oil-resistant rubber. The prior art parts often employ bronze pieces that have poorer corrosion resistance to media than polytetrafluoro, particularly copper, which is forbidden in some media. The sealing effect of the parts made of the polytetrafluoroethylene is better, and the purposes of reducing cost, weight and the like are achieved.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
(1) The invention can not only complete the support of the screw shaft and improve the stress state of the screw shaft, but also has the effects of protecting the screw shaft and prolonging the service life of the screw shaft;
(2) The sealing device has strong sealing strength, and can achieve and effectively prevent the leakage of materials of the discharge valve during feeding and discharging.
(3) The invention can well prevent the problem that the quality is affected due to spiral dead angle generated between the bottom of the conical mixer and the discharge valve when the spiral shaft rotates and rotates, improves the discharging speed of the material, and is convenient to clean.
The invention not only can solve the problems of supporting and sealing, but also improves the mixing efficiency of materials, and has wide application prospect under the condition that the more and more complicated the large-scale conical mixer equipment are in the future.
Drawings
Fig. 1 is a schematic diagram of the general assembly structure of a preferred embodiment of the present invention.
Fig. 2 is a schematic view of a spherical support structure according to a preferred embodiment of the invention.
Fig. 3 is a schematic view of a discharge valve body according to a preferred embodiment of the present invention.
Fig. 4 is a schematic view of a tile body according to a preferred embodiment of the present invention.
Reference numerals illustrate:
1: bottom gland
2: Static plate of discharge valve
3: Discharge valve moving plate
4. 6: Nylon pad
5: Compression ring of discharge valve
7: Support tile
8: Tetrafluoro ball support
9: O-shaped sealing ring
10: Compression ring
11: Disc spring
12: Spring tension sealing ring for shaft
13: Compression bolt
14. 21: Bearing
15: Thimble shaft
16: Screw shaft
17: Thimble gland
18: Bearing pedestal
19: Oil seal seat
20: Thimble ball
22: Cone cylinder
23: Bottom cone flange
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention. The experimental methods, in which specific conditions are not noted in the following examples, were selected according to conventional methods and conditions, or according to the commercial specifications.
As shown in fig. 1, a bottom cone flange 23 is welded at the bottom of the cone cylinder 22 of the cone mixer, and a spherical universal thimble discharge valve is used as a final discharge valve of the device and is connected with the bottom cone flange 23 through bolts. The center of the static plate 2 of the discharge valve is provided with a hollow cavity for accommodating a thimble ball 20, a support tile body (composed of a support tile 7 and a tetrafluoro ball support 8 as shown in fig. 4), a bearing 21, a compression ring 10, a bottom gland 1, sealing parts and the like. The long screw shaft 16 is designed into a hollow structure and is used for accommodating the thimble shaft 15, the bearing seat 18, a group of bearings 14, the spring tension sealing ring 12 for the shaft, the oil seal seat 19, the thimble gland 17 and other parts. The lower part of the static plate 2 of the spherical universal thimble discharging valve is provided with a flange for connecting downstream equipment.
As shown in fig. 2, the long screw shaft 16 of the conical mixer is hollow, and is internally provided with a bearing 14 and is fixed in axial position by a group of compression bolts 13, the thimble shaft 15 is fixed in a bearing seat 18 through two bearings 14, one end of the thimble shaft is sealed by a thimble gland 17, and the other end of the thimble shaft is compressed by an oil seal seat 19. A sliding groove is arranged on the outer side of the bearing seat 18. The oil seal seat 19 is provided with a group of oil seals and a spring tension sealing ring 12 for a shaft to form a combined sealing structure. Wherein the shaft spring tension seal ring 12 is a one-way seal composed of a metal cantilever spring and a mechanically processed filled polytetrafluoroethylene envelope, and is manufactured by the company Limited for thousands of trade under the model of SRV-045-PGM, da Lian. For the medicine and food processing industry, due to the requirements of disinfection and harsh chemical cleaning agents, the cavity at the spring can be filled with silica gel, so that pollutants are prevented from entering, and the sealing performance is good. This structure realizes that the long screw shaft 16 rotates, while the ejector pin shaft 15 and the ejector pin ball 20 do not rotate and only swing along with the revolution of the long screw shaft 16. The center of the thimble balls 20 is at the intersection of the screw axis and the tapered mixer body axis, and the position of the thimble balls 20 can be adjusted by sliding the position of the spherical universal thimble assembly within the screw axis 16.
As shown in fig. 3, the ejector pin ball 20 arranged in the static plate 2 of the spherical universal ejector pin discharge valve is used for supporting the external force brought by the screw shaft 16 when the screw shaft 16 works. The lower part of the thimble ball 20 is jacked by a support tile body (composed of a support tile 7 and a tetrafluoro ball support 8 as shown in figure 4). When the long screw shaft 16 revolves, the thimble shaft 15 and the thimble ball 20 do corresponding swinging. The thimble balls 20 and the shoe are stationary or rarely slid relative to each other. The thimble ball 20 is pressed by a pressing ring 10 at the upper part of the thimble ball 20. The upper part of the pressing ring 10 is pressed against the pressing ring 10 by a pair of disc springs 11, so that the pressing ring 10 is kept in close contact with the thimble balls 20. The compression ring 10 and the static plate 2 of the discharge valve are sealed by an O-shaped sealing ring 9, so that the leakage of materials is prevented. The material of the compression ring 10 is polytetrafluoroethylene. The friction coefficient of polytetrafluoroethylene is small, so that the abrasion is small; the compression ring 10 and the thimble ball 20 are tightly contacted, so that the material can be well prevented from entering, and the purposes of supporting and not generating waste materials are achieved. In order to reduce material accumulation between the spherical universal thimble discharge valve and the screw shaft and strengthen the rigidity and strength of the static plate 2 of the discharge valve, the valve plate is made into an upper arch cone shape, the cone angle of the upper arch cone is 164 degrees, and the upper arch angle of the cone surface is 8 degrees. The included angle between the bottom surface of the propeller and the screw shaft is 81 degrees, and the assembled propeller is parallel to the valve plate. The gap is controlled to be about 9-10 mm. Dead angles for stirring and mixing materials are reduced; the material residue during discharging can be reduced to the minimum. The problem that the quality of materials is affected due to friction of the materials at the bottom of the conical mixer can be avoided. The transition gap between the discharge valve moving plate 3 and the discharge valve static plate 2 is 2mm, and the transition gap between the discharge valve pressing ring 5 and the discharge valve moving plate 3 is 2mm; nylon gasket mounting grooves are formed in the outer edges of the discharging valve static piece 2 and the discharging valve moving piece 3, and sealing measures between the discharging valve static piece 2 and the discharging valve moving piece 3 and between the discharging valve static piece and the discharging valve pressing ring 5 are respectively made of nylon gaskets 4 and 6, so that light contact is achieved. The discharge valve is flexible and easy to open and close, and the leakage of materials is prevented. The section of nylon pad is right trapezoid, right trapezoid's upper portion is the hypotenuse, right trapezoid's inner circle is the long limit, right trapezoid's top is the fillet transition.
In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (10)
1. The cone-shaped mixer discharge valve with the spherical support comprises a screw shaft, wherein the screw shaft is provided with a screw propeller, and the screw shaft rotates around the shaft of the screw shaft in the cone-shaped mixer and revolves around the central shaft of the cylinder of the cone-shaped mixer;
The discharge valve comprises a discharge valve body and a spherical supporting structure arranged in a central cavity of the discharge valve body, and the discharge valve body comprises a discharge valve static piece, a discharge valve moving piece and a discharge valve compression ring; the device is characterized in that the static sheet of the discharge valve and the moving sheet of the discharge valve both comprise an upper arch conical surface, the upper arch angle of the conical surface is 8 degrees, the cone angle of the conical surface is 164 degrees, and the conical surface is parallel to the bottom surface of the propeller;
Nylon gasket mounting grooves are formed in the outer edges of the discharge valve static piece and the outer edges of the discharge valve moving piece, and nylon gasket sealing is adopted among the discharge valve static piece, the discharge valve moving piece and the discharge valve pressing ring; the depth of the nylon mat mounting groove is set as: the gaps between the discharge valve compression ring and the discharge valve static piece and between the discharge valve static piece and the discharge valve dynamic piece are smaller than the thickness of the nylon pad by 0.1mm so as to form light contact;
The cross-section of nylon pad is right trapezoid, right trapezoid's upper portion is the hypotenuse of outside slope, right trapezoid's inner circle is the long limit, right trapezoid's top is the fillet transition, the nylon pad has the interference magnitude before using.
2. The cone mixer discharge valve with spherical support of claim 1 wherein the distance between the discharge valve rotor and the bottom surface of the propeller is 9-10mm.
3. The cone mixer discharge valve with a spherical support of claim 1 wherein the transition gap between the discharge valve rotor and the discharge valve stator is 2mm and the transition gap between the discharge valve compression ring and the discharge valve rotor is 2mm.
4. The cone mixer discharge valve with a spherical support of claim 1 wherein said spherical support structure comprises a thimble ball, a bearing housing, and a thimble shaft mounted within said bearing housing, the center of said thimble ball being at the intersection of the screw shaft and the cone mixer body shaft.
5. The tapered mixer discharge valve with a spherical support of claim 4, wherein said thimble balls are secured to a shoe body supported by bearings, said shoe body including a shoe and a tetrafluoroball shoe.
6. The conical mixer discharge valve with the spherical support according to claim 4, wherein the upper part of the thimble ball is sealed with the static plate of the discharge valve through a combination of a compression ring, a disc spring and an O-shaped sealing ring; the clamping ring is installed on the upper portion of the thimble ball through embedding, the pair of disc springs are installed on the clamping ring back to back, an O-shaped groove is formed in the static piece of the discharge valve, and the O-shaped sealing ring is installed on the O-shaped groove.
7. The conical mixer discharge valve with the spherical support according to claim 4, wherein bearings are arranged at two ends of the thimble shaft, and an outer ring of the bearings is connected with the bearing seat; the bearing seat is fixed inside the screw shaft through a compression bolt.
8. The cone mixer discharge valve with spherical support of claim 4 wherein a sliding groove is provided on the outside of said bearing housing, the root of said bearing housing being sealed with an oil seal assembly by a spring tension seal ring for the shaft.
9. The tapered mixer discharge valve with a spherical support of claim 5, wherein said shoe and tetrafluoroball holder are each made of polytetrafluoroethylene.
10. The cone mixer discharge valve with a spherical support of claim 6 wherein said O-ring is made of oil resistant rubber and said compression ring is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510853677.4A CN106807302B (en) | 2015-11-27 | 2015-11-27 | Conical mixer discharge valve with spherical support |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510853677.4A CN106807302B (en) | 2015-11-27 | 2015-11-27 | Conical mixer discharge valve with spherical support |
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| CN106807302A CN106807302A (en) | 2017-06-09 |
| CN106807302B true CN106807302B (en) | 2024-05-28 |
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| CN201510853677.4A Active CN106807302B (en) | 2015-11-27 | 2015-11-27 | Conical mixer discharge valve with spherical support |
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| CN109985561A (en) * | 2019-03-19 | 2019-07-09 | 兖矿鲁南化工有限公司 | A kind of powder mixing agitator bottom structure, mixing agitator and storage device |
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| CN205164653U (en) * | 2015-11-27 | 2016-04-20 | 双龙集团有限公司 | Cone -type mixer bleeder valve that dribbling shape was supported |
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2015
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| DE3924368A1 (en) * | 1989-06-21 | 1991-01-03 | Krauss Maffei Ag | Mixer bowl with circulating rotary worm through dome |
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| CN205164653U (en) * | 2015-11-27 | 2016-04-20 | 双龙集团有限公司 | Cone -type mixer bleeder valve that dribbling shape was supported |
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