Additive integrated pneumatic conveying and mixing system

Abstract

The utility model discloses an integrated pneumatic conveying and mixing system for additives. The integrated pneumatic conveying and mixing system comprises a first mortar adding and feeding device, a second mortar adding and feeding device, a powder subtraction scale, an additive metering scale, a pneumatic conveying device and a powder metering and mixing device, a discharge port of the first mortar adding and feeding device is connected with a feed port of an additive metering scale; a discharge port of the second mortar agent and material adding device is connected with a feed port of the powder subtraction scale; a discharge port of the powder subtraction scale is connected with a feed port of the additive material metering scale; a discharge port of the additive metering scale is connected with a feed port of the pneumatic conveying device, and a discharge port of the pneumatic conveying device is connected with the powder metering and mixing device. According to the integrated pneumatic conveying and mixing system for the additives, an independent metering process is firstly carried out on the additives with the small weight, the weighing accuracy of the additives with the small weight is guaranteed, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to an additive integrated pneumatic conveying and mixing system. Background Art

[0002] At present, during the production and processing of mortar used in the construction industry, additives such as water reducers and cellulose are often required. The additives and raw materials are mixed and then processed to obtain the final product. According to the different products finally produced, the required types of additives and the required weights of each additive are also different. In the prior art, various additives are usually stored and fed separately by classification. Whichever additive is needed, it is fed according to the formula, and the required weights of each additive are different. When the required weight of some additives is small, when they are put into the weighing scale, because of their small weight, the influence on the weighing result is not significant, which will lead to inaccurate weighing of these additives with small required weights, resulting in quality problems of the product. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an additive integrated pneumatic conveying and mixing system, which first performs a separate metering process on additives with small weights to ensure the weighing accuracy of additives with small weights and improve the product quality.

[0004] To solve the above technical problem, the technical solution of the utility model is:

[0005] An additive integrated pneumatic conveying and mixing system, which includes a first mortar additive feeding device, a second mortar additive feeding device, a powder subtraction scale, an additive material metering scale, a pneumatic conveying device and a powder metering and mixing device;

[0006] The discharge port of the first mortar additive feeding device is connected to the feed port of the additive material metering scale;

[0007] The discharge port of the second mortar additive feeding device is connected to the feed port of the powder subtraction scale, and the discharge port of the powder subtraction scale is connected to the feed port of the additive material metering scale;

[0008] The discharge port of the additive material metering scale is connected to the feed port of the pneumatic conveying device, and the discharge port of the pneumatic conveying device is connected to the powder metering and mixing device.

[0009] Further, it further includes a conveying screw. The discharge port of the first mortar additive feeding device is connected to the feed port of the additive material metering scale through the conveying screw, and the discharge port of the second mortar additive feeding device is connected to the feed port of the powder subtraction scale through the conveying screw.

[0010] Furthermore, the powder subtraction scale includes a silo, a dispersing device, a first screw, a second screw, a power mechanism, a weighing sensor, and a base;

[0011] The silo, the weighing sensor, and the power mechanism are all arranged on the base, and the weighing sensor is located below the silo;

[0012] The dispersing device is arranged at the bottom of the inner cavity of the silo. The dispersing device includes a dispersing rotating shaft, a connecting rod, and dispersing blades. The connecting rod is fixed at the end of the dispersing rotating shaft, and the two dispersing blades are respectively fixed at both ends of the connecting rod;

[0013] A conveying pipe is arranged at the discharge port of the silo, and the first screw and the second screw are both arranged in the conveying pipe;

[0014] The power mechanism is used to drive the dispersing rotating shaft, the first screw, and the second screw to rotate.

[0015] Furthermore, the dispersing blades are arc-shaped.

[0016] Furthermore, the power mechanism includes a variable-frequency motor, a speed reducer, and a transmission box body. A first driving sprocket, a second driving sprocket, a third driving sprocket, a dispersing sprocket, a first screw sprocket, and a second screw sprocket are arranged in the transmission box body. The variable-frequency motor is connected to the speed reducer. The first driving sprocket, the second driving sprocket, and the third driving sprocket are all fixed on the output shaft of the speed reducer. The dispersing sprocket is fixed on the dispersing rotating shaft. The first screw sprocket is fixed on the first screw. The second screw sprocket is fixed on the second screw. The first driving sprocket is in transmission connection with the dispersing sprocket through a chain. The second driving sprocket is in transmission connection with the first screw sprocket through a chain. The third driving sprocket is in transmission connection with the second screw sprocket through a chain.

[0017] Furthermore, it further includes a ton bag packing machine, and the feeding port of the ton bag packing machine is connected to the discharge port of the powder metering and mixing device.

[0018] Adopting the above technical solution, the utility model separately dispenses conventional weight additives and smaller weight additives. Through the powder subtraction scale, a separate metering process is first carried out on the smaller weight additives to ensure the weighing accuracy of the smaller weight additives. After the metering of the smaller weight additives is completed, they enter the additive material metering scale together with the conventional weight additives for metering and summarization. The metering of various additives is more accurate, ensuring the product production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an additive integrated pneumatic conveying and mixing system of the utility model;

[0020] Figure 2Structural schematic diagram of the powder subtraction scale of the present utility model;

[0021] Figure 3 is Figure 2 left view;

[0022] Figure 4 is Figure 2 top view;

[0023] Figure 5 Structural schematic diagram of the transmission connection inside the transmission box of the present utility model;

[0024] Figure 6 Structural schematic diagram of the first screw and the second screw of the present utility model;

[0025] Figure 7 Installation structural schematic diagram of the first driving sprocket, the second driving sprocket and the third driving sprocket of the present utility model. Specific embodiments

[0026] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments in conjunction with the accompanying drawings.

[0027] As Figure 1 shown, this embodiment provides an additive integrated pneumatic conveying and mixing system, which includes a first mortar additive feeding device 101, a second mortar additive feeding device 102, a powder subtraction scale 103, an additive weighing scale 104, a pneumatic conveying device 105, a powder weighing and mixing device 106 and a ton bag packaging machine 108. The first mortar additive feeding device 101 is used for the feeding of conventional weight additives, and the second mortar additive feeding device 102 is used for the feeding of smaller weight additives. The number of the first mortar additive feeding device 101 and the second mortar additive feeding device 102 is not limited, and the specific number is set according to the types of additives required by the product formula. Both the first mortar additive feeding device 101 and the second mortar additive feeding device 102 adopt the patented product "Mortar admixture feeding system" with the application number CN202122061203.X.

[0028] As Figure 1 shown, the discharge port of the first mortar additive feeding device 101 of this embodiment is connected to the feed port of the additive weighing scale 104 through a conveying screw 107. The additive is dispersed and conveyed by the conveying screw 107 to the additive weighing scale 104 for weighing and temporary storage. The additive weighing scale 104 is an addition scale and adopts the patented product "High-precision additive weighing scale 104" with the application number CN202021592755.2. All required additives are aggregated in the additive weighing scale 104 and temporarily stored after weighing.

[0029] AsFigure 1 As shown in the figure, the discharge port of the second mortar additive feeding device 102 in this embodiment is connected to the feeding port of the powder subtraction scale 103 through the conveying screw 107, and the discharge port of the powder subtraction scale 103 is connected to the feeding port of the additive weighing scale 104. Since the second mortar additive feeding device 102 is used for the feeding of additives with a relatively small weight, a powder subtraction scale 103 is added at the discharge port of the second mortar additive feeding device 102 in this embodiment. The powder subtraction scale 103 has a higher precision. After the powder subtraction scale 103 accurately weighs the additives with a relatively small weight, the additives are then put into the additive weighing scale 104, thereby ensuring accurate metering.

[0030] As Figures 2 to 7 shown in the figure, the powder subtraction scale 103 in this embodiment includes a silo 1, a dispersing device, a first screw 21, a second screw 22, a power mechanism, a weighing sensor 3, and a base 4.

[0031] The silo 1, the weighing sensor 3, and the power mechanism are all arranged on the base 4. The weighing sensor 3 is located below the silo 1 and is used to weigh the silo 1.

[0032] The dispersing device is arranged at the bottom of the inner cavity of the silo 1. The dispersing device includes a dispersing rotating shaft 51, a connecting rod 52, and dispersing blades 53. The connecting rod 52 is fixed to the end of the dispersing rotating shaft 51. Two dispersing blades 53 are respectively fixed to both ends of the connecting rod 52. The dispersing blades 53 are arc-shaped. After the dispersing rotating shaft 51 rotates, the two arc-shaped dispersing blades 53 can be driven to rotate at the bottom of the inner cavity of the silo 1. Since the two dispersing blades 53 are arc-shaped, during the dispersing process, the rotation coverage area of the two dispersing blades 53 is a sphere, so that the powder in the silo 1 can be dispersed in all directions, preventing the powder from arching and bridging.

[0033] A conveying pipe 6 is arranged at the discharge port of the silo 1. Both ends of the first screw 21 and the second screw 22 are fixed in the conveying pipe 6 through bearing seats. An outlet flexible connection 12 is arranged at the discharge port of the conveying pipe 6. After the powder in the silo 1 enters the conveying pipe 6, it is simultaneously spirally conveyed by the first screw 21 and the second screw 22. In this embodiment, a double-screw structure is adopted. The powder material is extruded between the two screws and then output from the discharge port of the conveying pipe 6. While ensuring linear feeding, a feeding accuracy of ±0.2% can be achieved. An outlet flexible connection 12 is arranged at the discharge port of the conveying pipe 6. The conveying pipe 6 is connected to the next-stage additive weighing scale 104 through the outlet flexible connection 12. The flexible connection generally adopts a structure connected by a cloth bag or a filter cloth, which can avoid the metering error of the weighing scale caused by equipment vibration.

[0034] The power mechanism is used to drive the rotation of the dispersing rotating shaft 51, the first screw 21 and the second screw 22. The power mechanism includes a variable-frequency motor 71, a speed reducer 72 and a transmission box body 73. Inside the transmission box body 73, there are a first driving sprocket 74, a second driving sprocket 75, a third driving sprocket 76, a dispersing sprocket 77, a first screw sprocket 78 and a second screw sprocket 79. The variable-frequency motor 71 is connected to the speed reducer 72. The first driving sprocket 74, the second driving sprocket 75 and the third driving sprocket 76 are all fixed on the output shaft 721 of the speed reducer 72. The dispersing sprocket 77 is fixed on the dispersing rotating shaft 51. The dispersing rotating shaft 51 is rotationally connected to the transmission box body 73 through a bearing seat. The first screw sprocket 78 is fixed on the first screw 21. The second screw sprocket 79 is fixed on the second screw 22. The first driving sprocket 74 is drivingly connected to the dispersing sprocket 77 through a chain. The second driving sprocket 75 is drivingly connected to the first screw sprocket 78 through a chain. The third driving sprocket 76 is drivingly connected to the second screw sprocket 79 through a chain. The speed reducer 72 drives the first driving sprocket 74, the second driving sprocket 75 and the third driving sprocket 76 to rotate coaxially. The first driving sprocket 74, the second driving sprocket 75 and the third driving sprocket 76 then drive the dispersing sprocket 77, the first screw sprocket 78 and the second screw sprocket 79 to rotate simultaneously, so as to drive the dispersing device, the first screw 21 and the second screw 22 to rotate. Since the rotational speed of the dispersing device needs to be slower than that of the first screw 21 and the second screw 22, the diameter of the dispersing sprocket 77 is larger than the diameters of the first screw sprocket 78 and the second screw sprocket 79. The diameters of the first screw sprocket 78 and the second screw sprocket 79 are the same.

[0035] An electrical control box 8 is arranged on the base 4. Equipment such as a PLC controller and a power supply are installed inside the electrical control box 8 to collect the weighing values of the weighing sensors 3 and control the start, stop and rotation of the variable-frequency motor 71.

[0036] A shock-absorbing pad 9 is arranged at the bottom of the base 4 to relieve the vibration of the equipment on the ground during use.

[0037] A feeding flexible connection 10 is arranged at the feeding port of the silo 1. The silo 1 is connected to the conveying screw 107 of the upper-stage second mortar additive feeding device 102 through a flexible connection, which can avoid the metering error of the weighing scale caused by the vibration of the equipment. A breather cap 11 is arranged at the top of the silo 1 in this embodiment to ventilate the silo 1 during feeding.

[0038] As Figure 1As shown in the figure, the discharge port of the additive material weighing scale 104 in this embodiment is connected to the feed port of the pneumatic conveying device 105, and the discharge port of the pneumatic conveying device 105 is connected to the powder weighing and mixing device 106. All the weighed additives are temporarily stored in the additive material weighing scale 104, and then the pneumatic conveying device 105 transports all the additives to the powder weighing and mixing device 106. The powder weighing and mixing device 106 adopts the patented product "Powder Weighing and Mixing Device 106" with the application number CN202021708776.6. It consists of a weighing device and a mixing mechanism. The raw materials are put into the weighing device and then enter the mixer by the weighing device for mixing. The pneumatic conveying device 105 transports all the additives into the mixer to be mixed with the raw materials together.

[0039] As Figure 1 shown in the figure, the discharge port of the powder weighing and mixing device 106 in this embodiment is connected to the feed port of the ton bag packing machine 108. After the raw materials and additives are mixed well, they enter the ton bag packing machine 108 for packaging.

[0040] The specific embodiments described above further elaborate on the technical problems solved, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An additive integrated pneumatic conveying and mixing system, characterized in that: It comprises a first mortar additive feeding device (101), a second mortar additive feeding device (102), a powder subtraction scale (103), an additive material metering scale (104), a pneumatic conveying device (105) and a powder material metering and mixing device (106); The discharge port of the first mortar additive feeding device (101) is connected to the feed port of the additive material metering scale (104); The discharge port of the second mortar additive feeding device (102) is connected to the feed port of the powder subtraction scale (103), and the discharge port of the powder subtraction scale (103) is connected to the feed port of the additive material metering scale (104); The discharge port of the additive material metering scale (104) is connected to the feed port of the pneumatic conveying device (105), and the discharge port of the pneumatic conveying device (105) is connected to the powder material metering and mixing device (106).

2. The additive-integrated pneumatic conveying and mixing system according to claim 1, characterized in that: It also includes a conveying screw (107), wherein the discharge port of the first mortar additive feeding device (101) is connected to the feed port of the additive material metering scale (104) through the conveying screw (107), and the discharge port of the second mortar additive feeding device (102) is connected to the feed port of the powder subtraction scale (103) through the conveying screw (107).

3. The additive-integrated pneumatic conveying and mixing system according to claim 1, characterized in that: The powder subtraction scale (103) comprises a material bin (1), a disintegrating device, a first screw (21), a second screw (22), a power mechanism, a weighing sensor (3) and a base (4); The silo (1), the weighing sensor (3) and the power mechanism are all arranged on a base (4), and the weighing sensor (3) is located below the silo (1); The scattering device is arranged at the bottom of the inner cavity of the silo (1), and comprises a scattering rotating shaft (51), a connecting rod (52) and scattering blades (53), wherein the connecting rod (52) is fixed to the end of the scattering rotating shaft (51), and the two scattering blades (53) are respectively fixed to the two ends of the connecting rod (52); The discharge port of the silo (1) is provided with a conveying pipe (6), and the first screw (21) and the second screw (22) are both arranged in the conveying pipe (6); The power mechanism is used to drive the breaking up rotating shaft (51), the first screw (21) and the second screw (22) to rotate.

4. The additive-integrated pneumatic conveying and mixing system according to claim 3, characterized in that: The scattering blades (53) are arc-shaped.

5. The additive-integrated pneumatic conveying and mixing system according to claim 3, characterized in that: The power mechanism comprises a variable frequency motor (71), a speed reducer (72) and a transmission housing (73); a first driving sprocket (74), a second driving sprocket (75), a third driving sprocket (76), a breaking sprocket (77), a first screw sprocket (78) and a second screw sprocket (79) are arranged in the transmission housing (73); the variable frequency motor (71) is connected to the speed reducer (72); the first driving sprocket (74), the second driving sprocket (75) and the third driving sprocket (76) are all fixed to the speed reducer (72); The first sprocket (74) is connected to the output shaft (721) of the dispersing device, the dispersing sprocket (77) is fixed on the dispersing rotating shaft (51), the first screw sprocket (78) is fixed on the first screw (21), the second screw sprocket (79) is fixed on the second screw (22), the first driving sprocket (74) is connected to the dispersing sprocket (77) through a chain, the second driving sprocket (75) is connected to the first screw sprocket (78) through a chain, and the third driving sprocket (76) is connected to the second screw sprocket (79) through a chain.

6. The additive-integrated pneumatic conveying and compounding system according to claim 1, characterized in that: It also includes a ton bag packaging machine (108), wherein the feed port of the ton bag packaging machine (108) is connected to the discharge port of the powder material metering and mixing device (106).

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