A mixing device for rock concrete production

Abstract

This utility model provides a mixing device for producing rock slag concrete, including a mixing tower with a screening box. The top of the screening box has symmetrically distributed dovetail chutes, each containing a dovetail slider. A sliding frame is slidably mounted between the dovetail sliders, and a screening box is fixedly mounted on the lower surface of the sliding frame. A first screen is mounted on the upper side of the screening box, and a second screen is mounted in the middle of the screening box. Using this mixing device, the rock slag material entering the screening box falls sequentially onto the first and second screens. The reciprocating motion of the first and second screens, along with the chute plate, rapidly and efficiently screens the rock slag material, quickly obtaining a usable portion for subsequent mixing.

Description

Technical Field

[0001] This utility model belongs to the field of concrete production technology, and specifically relates to a mixing device for producing rock ballast concrete. Background Technology

[0002] Rock slag concrete is a type of concrete made by replacing some or all of the traditional natural coarse aggregates (sand and stone) with waste excavated material (crushed stone and boulders) generated during tunnel excavation. It has significant advantages such as waste utilization, cost reduction, resource conservation, and environmental protection. It is particularly suitable for projects near where tunnel boring machines generate a large amount of rock slag when excavating tunnels in hard rock sections. Due to the complex composition of the excavated rock slag, a mixing device is required to mix the raw materials during the production of rock slag concrete.

[0003] Existing mixing equipment for producing rock ballast concrete uses rock ballast instead of natural coarse aggregate, river sand as fine aggregate, and cement as a binder. A polycarboxylate superplasticizer is added to adjust the fluidity. The raw materials are mixed by adding rock ballast, river sand, cement, and the superplasticizer into a mixing tank, and then a motor drives a connected mixing paddle to rotate. However, in actual use, the rock ballast raw materials require manual pre-screening, which is difficult to control in terms of particle size range, resulting in significant particle size variations. This affects the mixing efficiency and concrete performance during subsequent mixing, prolonging the mixing time and causing considerable inconvenience. Utility Model Content

[0004] In view of this, this utility model addresses the shortcomings of the existing technology by providing a mixing device for the production of rock slag concrete. The rock slag raw material entering the screening box will fall onto screen one and screen two in sequence. Screen one and screen two move back and forth and left and right in the process of moving back and forth, so as to quickly and efficiently screen the raw material and quickly obtain the usable part, which is convenient for subsequent mixing work.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a mixing device for producing rock slag concrete, including a mixing tower, a screening box on the mixing tower, a feeding pipe on the outside of the mixing tower, symmetrically distributed dovetail grooves at the top of the inside of the screening box, a dovetail slider slidably installed inside each dovetail groove, a sliding frame slidably installed between the dovetail sliders, a screening box fixedly installed on the lower surface of the sliding frame, a screen one installed on the upper inside of the screening box, a screen two installed in the middle inside the screening box, and a chute plate installed on the lower inside of the screening box; a solenoid valve is installed on the lower side of the mixing tower, a discharge pipe is installed below the solenoid valve, a feed hopper is installed on the upper side of the mixing tower, and the screening box is installed in conjunction with the feed hopper; multiple rubber pads are installed on the lower surface of the frame.

[0006] As a further improvement of this utility model, the screening box is also equipped with a driving mechanism, which is used to drive the swaying screening of the screening box; the driving mechanism includes driven wheels symmetrically arranged on the sliding frame, a guide rail is provided on the upper side of the inside of the screening box, the driven wheels are all installed in cooperation with the guide rail, multiple springs are provided between the sliding frame and the adjacent dovetail sliders, and the springs are all sleeved on the outside of the sliding frame; an electric push rod is provided on the outside of the screening box, a connecting plate is provided between the rear sides of the dovetail sliders, and the telescopic end of the electric push rod is connected and fixed to the connecting plate.

[0007] As a further improvement of this utility model, a first slag discharge hopper is provided on the upper side of the screening box, which is installed in conjunction with a first screen. A second slag discharge hopper is provided in the middle of the screening box, which is installed in conjunction with a second screen. A third slag discharge hopper is provided on the lower side of the screening box, which is installed in conjunction with a chute plate. The second slag discharge hopper is connected to the mixing tower through a connecting pipe.

[0008] As a further improvement of this utility model, a first mixing impeller is provided on the upper side of the mixing tower, a second mixing impeller is provided on the lower side of the mixing tower, a first motor is provided on the upper side of the mixing tower, and the output shaft of the first motor is fixed to the first mixing impeller by a coupling. A second motor is provided on the lower side of the mixing tower, and the output shaft of the second motor is fixed to the second mixing impeller by a coupling.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] Firstly, the telescopic end of the electric push rod drives the connecting plate to move horizontally back and forth, causing the dovetail slider to drive the screening box to move back and forth through the sliding frame, thereby driving the screen one and screen two inside the screening box to move back and forth.

[0011] Secondly, during the reciprocating movement of the sliding frame, the driven wheel moves on the guide rail, causing the sliding frame to move back and forth and then back and forth and then left and right during the reciprocating movement of the screening box, which in turn causes the screens inside the screening box to move back and forth and then back and forth and then left and right during the reciprocating movement of the screens.

[0012] Thirdly, the raw materials entering the screening box will fall onto screen one and screen two in sequence. Screen one and screen two move back and forth and left and right in the process of moving back and forth, so as to screen the raw materials quickly and efficiently.

[0013] Fourth, the rubber pads on the lower surface of the frame can effectively prevent the frame from being damaged by rigid contact with the ground under the weight of the equipment above. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the internal cross-sectional structure of this utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A in this utility model;

[0018] Figure 4 This is a schematic diagram of the planar structure of this utility model.

[0019] In the diagram: 101, frame; 102, mixing tower; 103, solenoid valve; 104, discharge pipe; 105, screening box; 106, feed hopper; 107, mixing paddle one; 108, mixing paddle two; 109, motor one; 110, motor two; 201, dovetail chute; 202, dovetail slider; 203, sliding frame; 204, screening box; 205, screen one; 206, slag discharge hopper one; 207, screen two; 208, slag discharge hopper two; 209, driven wheel; 210, guide rail; 211, spring; 212, electric push rod; 213, chute plate; 214, slag discharge hopper three. Detailed Implementation

[0020] To better understand this utility model, the following embodiments further illustrate its content, but the scope of protection of this utility model is not limited to the embodiments described below. Numerous specific details are set forth in the following description to provide a more thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can be practiced without one or more of these details.

[0021] like Figure 2 , 4 As shown, the system includes a mixing tower 102, with a feeding pipe on the outside of the mixing tower 102. A screening box 105 is installed on the mixing tower 102. The top of the screening box 105 has symmetrically distributed dovetail grooves 201. Each dovetail groove 201 has a dovetail slider 202 slidably installed inside. A sliding frame 203 is slidably installed between the dovetail sliders 202. A screening box 204 is fixedly installed on the lower surface of the sliding frame 203. A first screen 205 is installed on the upper side of the screening box 204. A second screen 207 is installed in the middle of the screening box 204. A chute plate 213 is installed on the lower side of the screening box 204. A driving mechanism is also installed on the screening box 105 to drive the screening box 204 to shake and screen. The first screen 205 is a 9.5mm screen and the second screen 207 is a 4.75mm screen.

[0022] like Figure 2 , 3As shown, the driving mechanism includes driven wheels 209 symmetrically arranged on the sliding frame 203. A guide rail 210 is provided on the upper inner side of the screening box 105, and the driven wheels 209 are all installed in cooperation with the guide rail 210. Multiple springs 211 are provided between the sliding frame 203 and the adjacent dovetail sliders 202, and the springs 211 are all sleeved on the outer side of the sliding frame 203. An electric push rod 212 is provided on the outer side of the screening box 105, and a connecting plate is provided between the rear sides of the dovetail sliders 202. The telescopic end of the electric push rod 212 is connected and fixed to the connecting plate; a slag discharge hopper 1 206 is provided on the upper side of the screening box 204, and the slag discharge hopper 1 206 is installed in conjunction with the screen mesh 1 205; a slag discharge hopper 208 is provided in the middle of the screening box 204, and the slag discharge hopper 208 is installed in conjunction with the screen mesh 207; a slag discharge hopper 3 214 is provided on the lower side of the screening box, and the slag discharge hopper 3 214 is installed in conjunction with the chute plate 213; and the slag discharge hopper 208 is connected to the mixing tower through a connecting pipe.

[0023] like Figure 2 , 4 As shown, a mixing impeller 107 is provided on the upper side of the interior of the mixing tower 102, a mixing impeller 2 108 is provided on the lower side of the interior of the mixing tower 102, a motor 109 is provided on the upper side of the mixing tower 102, and the output shaft of the motor 109 is fixed to the mixing impeller 107 by a coupling. A motor 2 110 is provided on the lower side of the mixing tower 102, and the output shaft of the motor 2 110 is fixed to the mixing impeller 2 108 by a coupling.

[0024] like Figure 1 , 4 As shown, a solenoid valve 103 is provided on the lower side of the mixing tower 102, and a discharge pipe 104 is provided on the lower side of the solenoid valve 103. A feed hopper 106 is provided on the upper side of the mixing tower 102, and a screening box 204 is installed in conjunction with the feed hopper 106. The upper end of the screening box 204 extends into the lower end of the feed hopper 106, and the upper end of the screening box 204 is larger than the lower end of the feed hopper 106.

[0025] According to another embodiment of the present invention, such as Figure 1 , 2 As shown, multiple rubber pads are provided on the lower surface of the frame 101.

[0026] In use, the telescopic end of the electric push rod 212 drives the connecting plate to move horizontally back and forth, which in turn drives the dovetail slider 202 to move horizontally back and forth. The dovetail slider 202 drives the screening box 204 to move back and forth through the sliding frame 203, which in turn drives the screen 1 205 and screen 2 207 inside the screening box 204 to move back and forth back and forth. During the back and forth movement of the sliding frame 203, the sliding frame 203 drives the driven wheel 209 to move back and forth back and forth, which causes the driven wheel 209 to move on the guide rail 210. The guide rail 210 drives the sliding frame 203 to move left and right back and forth through the driven wheel 209. During the back and forth movement of the screening box 204, the sliding frame 203 moves left and right back and forth, which in turn drives the screen 1 205 and screen 2 207 inside the screening box 204 to move left and right back and forth.

[0027] The output shaft of motor 109 drives the mixing paddle 107 to rotate, and the output shaft of motor 110 drives the mixing paddle 108 to rotate, so that the mixing paddle 107 stirs and mixes the upper side of the mixing tower 102, and the mixing paddle 108 stirs and mixes the lower side of the mixing tower 102, thereby achieving the mixing and mixing of concrete raw materials.

[0028] In use, rock slag replaces natural coarse aggregate, river sand is used as fine aggregate, cement is used as cementing material, and a polycarboxylate-based high-efficiency water-reducing agent is added to adjust the fluidity. The rock slag is added into the feed hopper 106, followed by the river sand, cement, and polycarboxylate-based high-efficiency water-reducing agent, which are then added sequentially into the feeding pipe. The raw material entering the screening box 105 falls onto screen 1 (205) and screen 2 (207) in sequence. Screen 1 (205), acting as a 9.5mm screen, discharges rock slag larger than 9.5mm through the slag discharge hopper 206. Screen 207, with a 4.75mm screen, allows rock fragments of 4.75mm-9.5mm to enter the mixing tower 102 through a connecting pipe. Rock fragments smaller than 4.75mm fall onto the chute plate 213 and are finally discharged from the slag discharge hopper 214. The raw materials are quickly and efficiently screened by screens 205 and 207, which move back and forth and left and right. The screened raw materials fall into the mixing tower 102 and are quickly and efficiently stirred by mixing paddles 107 and 108.

[0029] During use, the rubber pads on the lower surface of the frame 101 can effectively prevent the frame 101 from being damaged due to rigid contact with the ground under the weight of the equipment above.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A mixing device for producing rock slag concrete, comprising a mixing tower (102), characterized in that: The mixing tower (102) is provided with a screening box (105), and a feeding pipe is provided on the outside of the mixing tower (102). The top of the screening box (105) is provided with symmetrically distributed dovetail grooves (201). Each dovetail groove (201) is slidably provided with a dovetail slider (202). A sliding frame (203) is slidably provided between the dovetail sliders (202). A screening box (204) is fixedly provided on the lower surface of the sliding frame (203). A screen one (205) is provided on the upper side of the screening box (204). A screen two (207) is provided in the middle of the screening box (204). A chute plate (213) is provided on the lower side of the screening box (204).

2. The mixing device for producing rock slag concrete as described in claim 1, characterized in that: The screening box (105) is also equipped with a driving mechanism, which is used to drive the sieving box (204) to shake and screen.

3. The mixing device for producing rock slag concrete as described in claim 2, characterized in that: The driving mechanism includes driven wheels (209) symmetrically arranged on the sliding frame (203). A guide rail (210) is provided on the upper side of the inside of the screening box (105). The driven wheels (209) are all installed in cooperation with the guide rail (210). Multiple springs (211) are provided between the sliding frame (203) and the adjacent dovetail slider (202). The springs (211) are all sleeved on the outside of the sliding frame (203).

4. The mixing device for producing rock slag concrete as described in claim 1, characterized in that: An electric push rod (212) is provided on the outside of the screening box (105), and a connecting plate is provided between the rear sides of the dovetail slider (202). The telescopic end of the electric push rod (212) is connected and fixed to the connecting plate.

5. A mixing device for producing rock slag concrete as described in claim 1, characterized in that: The upper side of the screening box (204) is provided with a first slag discharge hopper (206), which is installed in conjunction with a first screen (205). The middle part of the screening box (204) is provided with a second slag discharge hopper (208), which is installed in conjunction with a second screen (207). The lower side of the screening box (204) is provided with a third slag discharge hopper (214), which is installed in conjunction with a chute plate (213). The second slag discharge hopper (208) is connected to the mixing tower (102) through a connecting pipe.

6. The mixing device for producing rock slag concrete as described in claim 1, characterized in that: A mixing paddle one (107) is provided on the upper side of the interior of the mixing tower (102), a mixing paddle two (108) is provided on the lower side of the interior of the mixing tower (102), a motor one (109) is provided on the upper side of the mixing tower (102), and the output shaft of the motor one (109) is fixed to the mixing paddle one (107) by a coupling. A motor two (110) is provided on the lower side of the mixing tower (102), and the output shaft of the motor two (110) is fixed to the mixing paddle two (108) by a coupling.

7. A mixing device for producing rock slag concrete as described in claim 1, characterized in that: A solenoid valve (103) is provided on the lower side of the mixing tower (102), and a discharge pipe (104) is provided on the lower side of the solenoid valve (103). A feed hopper (106) is provided on the upper side of the mixing tower (102), and a screening box (204) is installed in conjunction with the feed hopper (106).

8. A mixing device for producing rock slag concrete as described in claim 1, characterized in that: Multiple rubber pads are provided on the lower surface of the frame (101).

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