Anti-seizure shaft device for mixing pot of concrete pre-mixing production unit

Abstract

The present invention discloses a concrete pre-mixing production unit mixing pot anti-seizing shaft device, a high-pressure flushing device is added between the mixing station water scale and the mixing pot, the high-pressure flushing device comprises a booster pump, a booster pump water inlet pipe, a booster pump water outlet pipe and two water spray pipes, the booster pump is installed on the side wall of the mixing pot, the two water spray pipes are arranged in the mixing pot and are respectively located directly above the two main shafts, and the bottom wall of the water spray pipe is provided with a spray hole; the booster pump inlet is connected to the water scale water outlet pipe through the booster pump water inlet pipe, and the booster pump outlet is respectively connected to the two water spray pipes through the booster pump water outlet pipe. The present invention continuously sprays high-pressure water onto the mixing main shaft through the spray pipe, and the concrete adhered to the mixing main shaft is separated from the main shaft under the impact and dilution of the spray water, thereby preventing the occurrence of the shaft wrapping phenomenon.

Description

Technical Field

[0001] The invention relates to the technical field of concrete preparation, and in particular to an anti-seizure shaft device for a mixing pot of a concrete pre-mixing production unit. Background Art

[0002] By 2020, the nuclear power project will achieve the goal of 58 million kilowatts in operation and 30 million kilowatts under construction, but there is still a gap of nearly 30 million kilowatts. The restart of a new round of nuclear power construction boom is proceeding in an orderly manner, and the potential market for commercial concrete in domestic nuclear power projects is huge.

[0003] In the process of continuous concrete production, the existing concrete pre-mixing production units are prone to the phenomenon of the mixing blades and the main shaft of the mixing pot sticking to the concrete mortar. If it is not removed in time, on the one hand, the solidified concrete mortar is difficult to remove; on the other hand, the solidified concrete mortar will absorb the mixing water in the subsequent concrete production, reducing the fluidity and cohesion of the concrete out of the machine. Especially in the production process of high-strength concrete, because its formula water consumption is relatively low and the setting speed is fast, the shaft sticking phenomenon has a more obvious reduction in the working performance of the concrete. Summary of the invention

[0004] In order to solve the technical problem that the existing concrete pre-mixing production unit produces a shaft-seizing phenomenon during the process of producing concrete, the present invention provides a shaft-seizing prevention device for a mixing pot of a concrete pre-mixing production unit.

[0005] The technical solution adopted by the present invention is:

[0006] A concrete pre-mixing production unit mixing pot anti-seizure shaft device comprises a mixing station water scale and a mixing pot, the mixing station water scale is connected to two water inlets of the mixing pot through a three-way pipe, a high-pressure flushing device is added between the mixing station water scale and the mixing pot, the high-pressure flushing device comprises a booster pump, a booster pump water inlet pipe, a booster pump water outlet pipe and two water spray pipes, the booster pump is fixedly installed on the side wall of the mixing pot through a bracket, the two water spray pipes are arranged in the mixing pot and are respectively located directly above the two main shafts, and the bottom wall of the water spray pipe is provided with a plurality of axially uniformly distributed spray holes; the booster pump inlet is connected to the main pipe of the water scale three-way pipe through the booster pump water inlet pipe, and the booster pump outlet is respectively connected to the two water spray pipes through the booster pump water outlet pipe.

[0007] The water stored in the existing water scale is used as the water source. During the concrete production process, the water is pressurized by a high-pressure pump and continuously sprayed onto the mixing main shaft through a water spray pipe. The concrete adhering to the mixing main shaft is separated from the main shaft under the impact and dilution of the spraying water, thereby preventing the occurrence of shaft sticking.

[0008] Furthermore, an impact ring is movably mounted between two adjacent stirring blades on the stirring main shaft of the stirring pot, and the impact ring is made of cast iron or carbon steel. The impact ring made of cast iron or carbon steel has a certain weight, and will continuously impact the concrete bonded to the main shaft during the rotation of the main shaft. The loose concrete impacted by the impact ring is completely removed from the main shaft under the action of spraying water, which can effectively prevent the occurrence of the shaft sticking phenomenon.

[0009] Furthermore, the inner circumferential surface of the impact ring is provided with a plurality of protrusions, which can reduce the contact area between the impact ring and the main shaft, increase the impact force, and improve the impact effect.

[0010] Furthermore, the plurality of protrusions are evenly distributed along the circumference of the impact ring, formed by radially outwardly protruding from the inner circumferential surface of the impact ring, and the outer surface of the protrusion is an arc surface. The design of the arc surface can place the damaged spindle while ensuring the impact strength.

[0011] Furthermore, the mass of the impact ring is 4-6 kg. If the impact ring is too light, it will not have an impact effect, and if it is too heavy, the main shaft load will be increased.

[0012] Furthermore, one end of the water spray pipe is fixed to the rear side wall of the stirring pot through a U-shaped bracket, and the other end is connected to the booster pump outlet pipe through a flange assembly, and the flange assembly includes a first flange, a sleeve, a sleeve flange, a second flange and connecting bolts. The first flange is welded to the end of the booster pump outlet pipe, the sleeve is welded in the front side wall of the stirring pot, one end of the sleeve extends out from the front side wall of the stirring pot, and the extended end is welded with a sleeve flange; the water spray pipe extends out from the sleeve, and the extended end is welded with a second flange; the connecting bolts pass through the first flange, the sleeve flange and the second flange in sequence to detachably connect the water spray pipe to the booster pump outlet pipe.

[0013] The detachable connection makes it easy to replace and clean the water spray pipe. The setting of the flange assembly makes it easy to disassemble and install, and can ensure the sealing of the pipeline.

[0014] Furthermore, a sealing gasket is provided between the first flange, the sleeve flange and the second flange to prevent leakage of spray water, reduce pump pressure head and reduce spray effect.

[0015] Furthermore, the spray holes are round holes with a diameter of 4 to 8 cm and a hole spacing of 15 to 20 cm. If the spray hole diameter is too small or the hole spacing is too large, no spray effect will be achieved. If the spray hole diameter is too large or the hole spacing is too small, the pressure head of the booster pump will be affected.

[0016] Furthermore, the water flow rate of the booster pump is 12-14m 3 / h. Within this water flow range, a better spraying effect can be achieved while saving pump investment and operating costs.

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention uses the water stored in the existing mixing station water scale as the spray water source, and does not need to add an additional water inlet system. The transformation is simple and convenient, and the investment cost is low. The booster pump is arranged between the mixing station water scale and the mixing pot, with a compact structure, a short pump outlet connection pipe, a small pump head loss, and convenient operation.

[0019] 2. The present invention provides an impact ring on the mixing main shaft. The impact ring continuously impacts the concrete adhered to the main shaft during the rotation of the main shaft, and is completely removed from the main shaft under the impact of the spraying water, thereby effectively preventing the main shaft from wrapping around the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic structural diagram of a device for preventing the shaft from seizing in a mixing pot of a concrete premixing production unit.

[0021] Figure 2 yes Figure 1 Section view along AA direction.

[0022] Figure 3 The present invention is a schematic structural diagram of an impact ring of an anti-seizure shaft device of a mixing pot of a concrete pre-mixing production unit.

[0023] Figure 4 yes Figure 1 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0024] In order to better understand the present invention, the content of the present invention is further explained below in conjunction with the embodiments, but the content of the present invention is not limited to the following embodiments.

[0025] See also Figure 1 to Figure 3 The present embodiment provides a concrete pre-mixing production unit mixing pot anti-seizure shaft device, including a mixing station water scale 50, a high-pressure flushing device and a mixing pot 10. The high-pressure flushing device includes a booster pump 40, a booster pump water inlet pipe 41, a booster pump water outlet pipe 42 and two water spray pipes 43.

[0026] The mixing station water scale 50 is connected to the two water inlets of the mixing pot 10 through a three-way pipe 51. The mixing station water scale 50 is a prior art and is used to supply water to the mixing pot 10 in a quantitative manner.

[0027] The stirring pot 10 is provided with a double arc pot bottom, and a stirring main shaft 12 is provided at the center of each arc, and a plurality of stirring blades 13 are provided axially at intervals on the stirring main shaft 12. An impact ring 20 is movably provided between two adjacent stirring blades on the stirring main shaft 12. The impact ring 20 is made of cast iron or carbon steel material, and its mass is selected within the range of 4 to 6 kg. When the impact ring 20 is coaxial with the stirring main shaft 12, the radial net spacing is 10 to 15 cm. The impact ring 20 is a circular ring, and a plurality of arc-shaped protrusions 21 are provided on the inner circumferential surface of the circular ring, such as 8 in the present embodiment, and the protrusions 21 are evenly distributed along the circumference of the impact ring, and are formed by radially outward protrusions of the inner circumferential surface of the impact ring, and the outer surface of the protrusion is an arc surface. In order to facilitate installation, the impact ring can be designed as a split type, and the two parts are connected by bolts.

[0028] The booster pump 40 is fixedly mounted on the front side wall of the stirring pot 10 by means of a bracket and bolts. In this embodiment, the booster pump 40 adopts a flow rate of 12 to 14 m / s. 3 / h, and a pipeline pump with a pressure head of 0.6-0.8mPa. The inlet of the booster pump 40 is connected to the main pipe of the water scale three-way pipe 51 through the booster pump water inlet pipe 41, and the booster pump inlet is provided with a water valve 411; the booster pump outlet is connected to the booster pump water outlet pipe 42, and the booster pump outlet is provided with a water outlet valve 421. The booster pump water outlet pipe 42 is a three-way pipe, and the three-way pipe outlets are respectively used to connect two water spray pipes 43.

[0029] Two water spray pipes 43 are respectively arranged above the two stirring main shafts 12. The bottom wall of the water spray pipe 43 is axially provided with uniformly distributed spray holes, the spray hole diameter is 4 to 8 cm, and the hole spacing is 15 to 20 cm. In this embodiment, the spray hole is a circular hole with a hole diameter of 6 cm, a hole spacing of 18 cm, and a spray pipe length of about 180 cm. The two water spray pipes 43 extend axially along the stirring main shaft, one end of the water spray pipe 43 is fixed to the rear side wall of the stirring pot 10 through a U-shaped bracket, and the other end is connected to the booster pump outlet pipe 42 from the flange assembly 422.

[0030] The flange assembly 422 includes a first flange 4221, a sleeve 4224, a sleeve flange 4223, a second flange 4222 and a connecting bolt 4225. The first flange 4221 is welded to the end of the booster pump outlet pipe 42. The sleeve 4224 passes through the front side wall of the stirring pot 10 and is fixed to the stirring pot 10 by welding. One end of the sleeve extends out from the front side wall of the stirring pot 10, and the extended end is welded with the sleeve flange 4223; the water spray pipe 43 extends out from the sleeve 4224 and the sleeve flange 4223, and the extended end is welded with the second flange 4222; the connecting bolt 4225 passes through the first flange 4221, the sleeve flange 4223 and the second flange 4222 in sequence to detachably connect the water spray pipe 43 to the booster pump outlet pipe 42.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A concrete pre-mixing production unit mixing pot anti-seizure shaft device, comprising a mixing station water scale and a mixing pot, wherein the mixing station water scale is connected to two water inlets of the mixing pot through a tee pipe, and is characterized in that: A high-pressure flushing device is added between the water scale and the mixing pot of the mixing station, and the high-pressure flushing device includes a booster pump, a booster pump water inlet pipe, a booster pump water outlet pipe and two water spray pipes. The booster pump is fixedly installed on the side wall of the mixing pot through a bracket, and the two water spray pipes are arranged in the mixing pot and are respectively located directly above the two main shafts. The bottom wall of the water spray pipe is provided with a plurality of axially evenly distributed spray holes; the booster pump inlet is connected to the main pipe of the water scale tee pipe through the booster pump water inlet pipe, and the booster pump outlet is connected to the two water spray pipes through the booster pump water outlet pipe; An impact ring is movably mounted between two adjacent stirring blades on the stirring main shaft of the stirring pot, and the impact ring is made of cast iron or carbon steel; The inner circumferential surface of the impact ring is provided with a plurality of protrusions; The plurality of protrusions are evenly distributed along the circumference of the impact ring, and are formed by the inner circumferential surface of the impact ring protruding radially outward, and the outer surface of the protrusion is an arc surface.

2. The anti-seizure shaft device for the mixing pot of a concrete pre-mixing production unit according to claim 1 is characterized in that: The mass of the impact ring is 4 to 6 kilograms.

3. The anti-seizure shaft device for the mixing pot of a concrete pre-mixing production unit according to claim 1 is characterized in that: One end of the water spray pipe is fixed to the rear side wall of the stirring pot through a U-shaped bracket, and the other end is connected to the booster pump outlet pipe through a flange assembly. The flange assembly includes a first flange, a sleeve, a sleeve flange, a second flange and connecting bolts. The first flange is welded to the end of the booster pump outlet pipe, the sleeve is welded in the front side wall of the stirring pot, one end of the sleeve extends out from the front side wall of the stirring pot, and the extended end is welded with a sleeve flange; the water spray pipe extends out from the sleeve, and the extended end is welded with a second flange; the connecting bolts pass through the first flange, the sleeve flange and the second flange in sequence to detachably connect the water spray pipe to the booster pump outlet pipe.

4. The anti-seizure shaft device for the mixing pot of a concrete pre-mixing production unit according to claim 3 is characterized in that: A sealing gasket is arranged between the first flange, the sleeve flange and the second flange.

5. The anti-seizure shaft device for the mixing pot of a concrete pre-mixing production unit according to claim 1 is characterized in that: The spray holes are circular holes with a hole diameter of 4 to 8 cm and a hole spacing of 15 to 20 cm.

6. The anti-seizure shaft device for the mixing pot of a concrete pre-mixing production unit according to claim 1 is characterized in that: The water flow rate of the booster pump is 12~14m 3 / h.

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