A device for preparing a mortar for injection

Abstract

The utility model discloses a preparation device of mortar for spraying, including feeding portion, through the feeding portion and throw into mortar preparation raw material, refinement department, refinement department is installed below the feeding portion, is responsible for the further refinement of thrown in mortar raw material, stirring portion, stirring portion is located below refinement department, is responsible for the mixing of the mortar raw material after refinement, drive portion, drive portion is responsible for driving refinement department and stirring portion, and drive portion is installed through stirring portion, and this device can mix after the refinement of raw material, and the smoothness of mortar is promoted, and the spraying construction is convenient.

Description

Technical Field

[0001] This utility model relates to a device for preparing sprayed mortar. Background Technology

[0002] The main components of the cement mortar used for spraying are cement, quartz sand, polypropylene fiber, etc.

[0003] Cement can caking during storage, and large particles can easily get mixed into the quartz sand during screening.

[0004] The aforementioned caking phenomenon and large-particle quartz sand can cause clogging of the spraying equipment during later spraying operations, affecting the construction process.

[0005] To address this, we designed a device for preparing sprayable mortar that can refine raw materials before mixing, thereby improving the fineness of the mortar and facilitating spray application. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a device for preparing spray mortar that can refine raw materials before mixing, improve the fineness of mortar, and facilitate spraying construction.

[0007] To solve the above problems, the present invention adopts the following technical solution:

[0008] An apparatus for preparing sprayable mortar, comprising,

[0009] The feeding section is used to feed in mortar to prepare raw materials.

[0010] The refining section is installed below the feeding section and is responsible for further refining the added mortar raw materials;

[0011] The mixing section, located below the refining section, is responsible for mixing the refined mortar raw materials.

[0012] The driving unit is responsible for driving the refining unit and the stirring unit, and the driving unit is installed through the stirring unit.

[0013] Preferably, the feeding section includes a conical feeding hopper, the lower end of which is connected to the refining section, and the diameter of the feeding hopper gradually decreases downward.

[0014] Preferably, the refining section includes a conical outer shell with a diameter that gradually increases downwards. A passive grinding body is detachably mounted on the inner side of the outer shell, and the inner wall of the passive grinding body is machined to form a rough grinding surface. An active grinding body is coaxially arranged inside the outer shell. The active grinding body is conical with a diameter that gradually increases downwards. A rough first grinding surface is machined on the outer wall of the active grinding body. A grinding gap with a width that gradually decreases downwards is formed between the grinding surface and the first grinding surface. The active grinding body is driven to rotate by the driving unit, and the lower end of the outer shell is connected to the stirring unit.

[0015] Preferably, the stirring part includes a bottom shell, the upper end of which is fixed to the outer shell. The material powder refined by the grinding gap falls into the bottom shell. A protruding boss is provided at the bottom axis of the bottom shell, and the diameter of the boss gradually decreases upward. A shaft tube is coaxially provided at the axis of the boss. A discharge valve is installed at the bottom of the bottom shell near the outer side. A rotating stirring mechanism is provided inside the bottom shell, and the stirring mechanism is installed through the active grinding body.

[0016] Preferably, the drive unit includes a gearbox and a drive motor. The drive motor is mounted on the input end of the gearbox, and a drive shaft is connected to the output flange of the gearbox. The drive shaft passes axially through the shaft tube. A bearing and a shaft seal are fitted between the drive shaft and the shaft tube. The shaft seal seals the outside of the bearing, so that powder particles located in the bottom shell are blocked outside the shaft tube. A protrusion is machined at the bottom of the active grinding body. The stirring mechanism includes a base, which is sleeved on the protrusion. A connecting plate is provided at the upper end of the drive shaft. The connecting plate is pressed against the bottom of the base. A long screw is fitted between the connecting plate and the protrusion, and the long screw passes through the base. Two or more stirring plates are arranged in a ring around the outside of the base. The drive motor is connected to a controller, and the speed of the drive motor is set by the controller.

[0017] Preferably, the upper part of the bottom shell is a conical part, the upper end of the conical part is connected to the outer shell, the diameter of the conical part gradually increases downward, a cleaning tube is provided on the outer conical surface of the conical part, and a tube cap is detachably installed at the opening of the cleaning tube.

[0018] The beneficial effects of this utility model are:

[0019] Reduced process steps: Traditional mortar preparation requires grinding raw materials separately and then transferring them to a mixer for mixing. However, this invention achieves continuous operation through an integrated feeding-grinding-mixing design, increasing production efficiency by more than 30% (actual test data: the traditional process takes 25 minutes per batch, while this device only takes 15 minutes).

[0020] Reduced energy consumption: Grinding and stirring share the same drive system (drive unit), saving 25%-30% of electricity compared to separate equipment.

[0021] Gradient grinding technology: Through graded crushing with conical grinding gaps, the coarse particles of quartz sand are further refined, resulting in a more reasonable particle size distribution in the finished product. This significantly improves the adhesion of the mortar during spraying and avoids nozzle clogging during mortar spraying. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the upper part of the device;

[0025] Figure 3 This is a schematic diagram of the lower part of the device. Detailed Implementation

[0026] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0027] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0028] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] See Figure 1 The apparatus shown is for preparing sprayed mortar, comprising,

[0032] Feeding section 1 is used to feed mortar to prepare raw materials.

[0033] Refining section 2 is installed below the feeding section 1 and is responsible for further refining the input mortar raw materials;

[0034] The mixing unit 3 is located below the refining unit 2 and is responsible for mixing the refined mortar raw materials.

[0035] The driving unit 4 is responsible for driving the refining unit 2 and the stirring unit 3. The driving unit 4 is installed through the stirring unit 3.

[0036] Preferably, the feeding section 1 includes a conical feeding hopper 11, the lower end of which is connected to the refining section 2, and the diameter of the feeding hopper 11 gradually decreases downward.

[0037] The recommended cone angle for the feed hopper 11 is 60°±5° (which meets the requirements for the angle of repose in powder engineering).

[0038] In large-scale mixing, a vibrating feeder can be added to the outside of the feed hopper 11 as needed to ensure smooth material discharge.

[0039] See Figure 2 and Figure 3 As shown, the refining section 2 includes a conical outer shell 21, the diameter of which gradually increases downwards. A passive grinding body 22 is detachably installed on the inner side of the outer shell 21. The inner wall of the passive grinding body 22 is machined to form a rough grinding surface 23. An active grinding body 24 is coaxially arranged inside the outer shell 21. The active grinding body 24 is conical, its diameter gradually increases downwards. A rough first grinding surface is machined on the outer wall of the active grinding body 24. A grinding gap 211 with a gradually decreasing width is formed between the grinding surface 23 and the first grinding surface. The active grinding body 24 is driven to rotate by the driving section 4. The lower end of the outer shell 21 is connected to the stirring section 3.

[0040] Grinding gap gradient parameters 211:

[0041] Upper inlet clearance: 20-40mm

[0042] Lower outlet clearance: 0.1-0.8mm

[0043] Technical specifications of the ground surface:

[0044] Surface hardness HRC58-62 (using tungsten carbide coating)

[0045] Roughness Ra3.2-Ra6.3 (forming an effective grinding tooth profile).

[0046] Rotation speed of the active grinding media: 60-200 rpm (adjustable according to the Mohs hardness of the material).

[0047] The rotation of the active grinding media further refines the incoming mortar raw materials, improving the fineness of the cement mortar and preventing material blockage during subsequent spraying.

[0048] See Figure 2 and Figure 3 As shown, the stirring unit 3 includes a bottom shell 31, the upper end of which is fixed to the outer shell 21. The material powder refined by the grinding gap 211 falls into the bottom shell 31. A protruding boss 32 is provided at the bottom axis of the bottom shell 31. The diameter of the boss 32 gradually decreases upward. A shaft tube 33 is coaxially provided at the axis of the boss 32. A discharge valve 34 is installed at the bottom of the bottom shell 31 near the outer side. A rotating stirring mechanism is provided inside the bottom shell 31. The stirring mechanism is installed through the active grinding body 24.

[0049] The protrusion 32 is designed to guide material outwards, facilitating the mixing of cement mortar.

[0050] See Figure 2 and Figure 3As shown, the drive unit 4 includes a reduction gearbox 41 and a drive motor 42. The drive motor 42 is mounted on the input end of the reduction gearbox 41. A drive shaft 43 is connected to the output flange of the reduction gearbox 41. The drive shaft 43 axially passes through the shaft tube 33. A bearing and a shaft seal are fitted between the drive shaft 43 and the shaft tube 33. The shaft seal seals the outside of the bearing, so that powder particles located in the bottom shell 31 are blocked outside the shaft tube 33. A protrusion 241 is machined on the bottom of the active grinding body 24. The stirring... The mechanism includes a base 311, which is sleeved on the protrusion 241. A connecting plate 433 is provided at the upper end of the drive shaft 43. The connecting plate 433 is pressed against the bottom of the base 311. A long screw 434 is fitted between the connecting plate 433 and the protrusion 241 and passes through the base 311. Two or more stirring plates 312 are arranged in a ring on the outer side of the base 311. The drive motor 42 is connected to a controller, and the speed of the drive motor 42 is set by the controller.

[0051] The recommended speed ratio for the 41 gearbox is 1:30.

[0052] In the above technical solution, the driving force is provided by the drive motor 42, and the speed ratio is changed by the reduction gearbox 41 to reduce the load on the drive motor 42.

[0053] The rotation of the drive shaft 43 drives the active grinding body to rotate, which in turn drives the mixing plate 312 to rotate, thus completing the mixing of cement mortar.

[0054] See Figure 3 As shown, the upper part of the bottom shell 31 is a conical part 331, and the upper end of the conical part 331 is connected to the outer shell 21. The diameter of the conical part 331 gradually increases downward. A cleaning tube 332 is provided on the outer conical surface of the conical part 331, and a tube cap 333 is detachably installed at the opening of the cleaning tube 332.

[0055] In the above technical solution, the pipe cover 333 can be opened to facilitate high-pressure rinsing of the inside of the mixing section by a high-pressure water gun.

[0056] 1. Raw material pretreatment

[0057] Step 1.1 Raw material ratio

[0058] Weigh according to the design mix proportion:

[0059] Cement (Grade 42.5 ordinary silicate): 35%-45%

[0060] Quartz sand: 50%-60%

[0061] Admixtures (water-reducing agents, quick-setting agents, etc.): 1%-3%

[0062] Fiber (polypropylene fiber, length 6-12mm): 0.1%-0.3%

[0063] Step 1.2 Premixing

[0064] Dry materials (cement, sand, fiber) are fed in through feeding section 1.

[0065] 2. Refine grinding

[0066] Start the drive unit 4 (set the speed to 160 rpm), the raw material is refined through the grinding gap 211 (outlet gap 0.2 mm), and monitor the drive motor current (70%-90% of the rated current is preferred).

[0067] 3. Stir and mix

[0068] Step 3.1 Dynamic stirring

[0069] The refined powder falls into the stirring section 3, and the stirring plate 312 runs at a linear velocity of 2m / s for a mixing time of ≥3 minutes (until CV≤5%).

[0070] Step 3.2 Addition of admixtures

[0071] Inject the liquid additive through cleaning tube 332 (tube cap 333 needs to be removed beforehand).

[0072] 4. Quality Inspection and Adjustment

[0073] Step 4.1 Online sampling and testing of fineness (laser particle size analyzer D90≤50μm) and flowability (slump≥180mm).

[0074] Step 4.2 Parameter Correction

[0075] If the fineness is insufficient, increase the speed of the drive motor (adjust in 50 rpm increments); if the uniformity is poor, extend the stirring time by 1 minute.

[0076] 5. Unloading and cleaning

[0077] Step 5.1 Unloading: Open the unloading valve 34. During unloading, keep the mixing plate 312 running at a low speed (50 rpm) to prevent material accumulation.

[0078] Step 5.2 Equipment Maintenance

[0079] After shutdown, the internal mixing section is rinsed by connecting a high-pressure water gun (pressure 0.5MPa) through cleaning pipe 332. The active grinding media also needs to be rinsed by feeding the feed hopper downwards.

[0080] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0081] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0082] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0083] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0084] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0085] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for preparing sprayed mortar, characterized in that: include, Feeding section (1), through which mortar is fed to prepare raw materials, Refining section (2) is installed below the feeding section (1) and is responsible for further refining the mortar raw materials that are fed in; The mixing section (3) is located below the refining section (2) and is responsible for mixing the refined mortar raw materials. The driving unit (4) is responsible for driving the refining unit (2) and the stirring unit (3). The driving unit (4) is installed through the stirring unit (3).

2. The apparatus for preparing sprayed mortar according to claim 1, characterized in that: The feeding section (1) includes a conical feeding hopper (11), the lower end of which is connected to the refining section (2), and the diameter of the feeding hopper (11) gradually decreases downward.

3. The apparatus for preparing sprayed mortar according to claim 2, characterized in that: The refining section (2) includes a conical outer shell (21) with a diameter that gradually increases downward. A passive grinding body (22) is detachably installed on the inner side of the outer shell (21). The inner wall of the passive grinding body (22) is machined to form a rough grinding surface (23). An active grinding body (24) is coaxially arranged inside the outer shell (21). The active grinding body (24) is conical with a diameter that gradually increases downward. A rough first grinding surface is machined on the outer wall of the active grinding body (24). A grinding gap (211) with a width that gradually decreases downward is formed between the grinding surface (23) and the first grinding surface. The active grinding body (24) is driven to rotate by the driving section (4). The lower end of the outer shell (21) is connected to the stirring section (3).

4. The apparatus for preparing sprayed mortar according to claim 3, characterized in that: The stirring part (3) includes a bottom shell (31), the upper end of which is fixed to the outer shell (21). The material powder refined by the grinding gap (211) falls into the bottom shell (31). A protruding boss (32) is provided at the bottom axis of the bottom shell (31). The diameter of the boss (32) gradually decreases upward. A shaft tube (33) is coaxially provided at the axis of the boss (32). A discharge valve (34) is installed at the bottom of the bottom shell (31) near the outer side. A rotating stirring mechanism is provided inside the bottom shell (31). The stirring mechanism is installed through the active grinding body (24).

5. The apparatus for preparing sprayed mortar according to claim 4, characterized in that: The drive unit (4) includes a gearbox (41) and a drive motor (42). The drive motor (42) is installed at the input end of the gearbox (41). A drive shaft (43) is connected to the output flange of the gearbox (41). The drive shaft (43) passes axially through the shaft tube (33). A bearing and a shaft seal are fitted between the drive shaft (43) and the shaft tube (33). The shaft seal seals the outside of the bearing, so that the powder particles located in the bottom shell (31) are blocked outside the shaft tube (33). A protrusion (241) is machined at the bottom of the active grinding body (24). The stirring mechanism The device includes a base (311) which is fitted onto the protrusion (241). A connecting plate (433) is provided at the upper end of the drive shaft (43). The connecting plate (433) is pressed against the bottom of the base (311). A long screw (434) is fitted between the connecting plate (433) and the protrusion (241) and passes through the base (311). Two or more stirring plates (312) are arranged in a ring around the outer side of the base (311). The drive motor (42) is connected to a controller, and the speed of the drive motor (42) is set by the controller.

6. The apparatus for preparing sprayed mortar according to claim 5, characterized in that: The upper part of the bottom shell (31) is a conical part (331), the upper end of which is connected to the outer shell (21). The diameter of the conical part (331) gradually increases downward. A cleaning tube (332) is provided on the outer conical surface of the conical part (331), and a tube cap (333) is detachably installed at the opening of the cleaning tube (332).

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