Reactive powder concrete product preparation device

Abstract

A reactive powder concrete product preparation device belongs to the technical field of concrete product preparation equipment, and comprises a vibration motor, an electric linear sliding table, an electric push rod, a linear bearing, a bottom plate, a frame, an electromagnetic valve, an upper plate, a mold housing, a negative pressure fan, an air heater, a pressure sensor, a mold, a lifting mechanism and a prompt circuit, the vibration motor, the electric linear sliding table, the electric push rod, the linear bearing, the bottom plate, the frame, the electromagnetic valve, the upper plate, the mold housing, the negative pressure fan, the air heater, the pressure sensor, the mold, the lifting mechanism and the prompt circuit are installed together. Under the combined action of related mechanisms, the negative pressure fan can pump and exhaust air in the mold in real time during production, the probability that bubbles are formed in a product is reduced, a formed semi-finished product can be heated and dried through the air heater, under the combined action of a prompt circuit and a pressure sensor, it can be guaranteed that feeding is in the proper amount as much as possible, and the production efficiency is improved. And on the basis of ensuring the product quality, the product production efficiency is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of concrete preparation equipment, in particular to a device for preparing active powder concrete products. Background Art

[0002] Reactive powder concrete (RPC) is a material developed in the 1990s that has ultra-high strength, high toughness, high durability and good volume stability. The compressive strength of RPC can reach 200MPa or even 800MPa, and the flexural strength is 30-60MPa, which effectively overcomes the high brittleness problem of ordinary high-performance concrete. Due to its excellent performance, RPC is widely used in bridges, nuclear power, municipal, marine and other engineering and military facilities.

[0003] In the prior art, the equipment for preparing concrete products using active powder concrete generally includes a mold and a vibration mechanism. When working, the active powder concrete material is poured into the mold, and then the active powder concrete material is vibrated and fixed into shape by the vibration mechanism, and then the mold is disassembled to obtain the active powder concrete product. Although the existing active powder concrete preparation meets the production needs to a certain extent, it is still limited by the structure and has the following technical problems. First, the vibration effect of the vibration mechanism during preparation is relatively limited, and it is possible that the vibration force is insufficient and the gas in the concrete cannot be discharged, which leads to bubbles inside the product, insufficient strength, and the product quality cannot be guaranteed. Second, the fixed molding is carried out at room temperature, and the relatively long curing time is not conducive to improving production efficiency. Third, it does not have the function of detecting the amount of concrete, that is, the staff usually relies on visual experience to inject material into the mold. When the staff lacks experience or lacks work responsibility, when too much or too little concrete is injected into the mold, it will have an adverse effect on the final quality of the product. Summary of the invention

[0004] In order to overcome the drawbacks of the existing active powder concrete preparation due to structural limitations as described in the background technology, the present invention provides an active powder concrete product preparation device that can, under the joint action of relevant mechanisms, extract and discharge the air in the mold in real time during production, thereby reducing the probability of bubble formation in the product, and can heat and dry the semi-finished product after molding, thereby ensuring that the feed is in an appropriate amount as much as possible, thereby ensuring product quality and improving product production efficiency.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A device for preparing active powder concrete products, comprising a vibration motor, an electric linear slide, an electric push rod, a linear bearing, a base plate, a frame, an electromagnetic valve, an upper plate, a mold cover, a negative pressure fan, a hot air blower, a pressure sensor, a mold, and a lifting mechanism and a prompt circuit; the frame has multiple sets, and the upper and lower ends of the multiple sets of frames are respectively installed around the lower end of the upper plate and the upper end of the base plate, the electric linear slide is installed at the lower end of the upper plate, the lower end of the sliding block of the electric linear slide is installed with a support plate, the upper ends of the multiple sets of linear bearings and the upper ends of the electric push rods M are installed at the lower end of the support plate, the upper end of the mold cover and the lower ends of the multiple sets of linear bearings and the lower end of the electric push rods are installed together, there are at least two electromagnetic valves, and connecting pipes are installed on both sides of the mold cover, the upper ends of the two connecting pipes are respectively connected to the lower ends of the two electromagnetic valves, and the two electric The upper end of the magnetic valve is connected to the air inlet pipe of the negative pressure fan and the exhaust pipe of the hot air blower via a hose; the lifting mechanism includes a movable plate, a linear bearing A, a motor reduction mechanism, a screw and a wire seat; support rods are installed around the lower end of the mold, and the lower ends of multiple support rods are installed on one side of the upper end of the bottom plate; openings are provided around and in the middle of the inner side of the mold; bearing sleeves of multiple sets of linear bearings A are fixedly installed in multiple openings around the mold, and upper ends of bearing rods of multiple sets of linear bearings A are installed around the lower end of the movable plate; the upper end of the wire seat is installed in the middle of the lower end outside the movable plate, the pressure sensor is fixedly installed on the side end of the opening in the middle of the mold, the vibration motor is installed at the lower end outside the mold, and the housing of the motor reduction mechanism is installed on the bottom plate; the signal output end of the pressure sensor is electrically connected to the signal input end of the prompt circuit.

[0007] Furthermore, the solenoid valve is a normally closed valve core solenoid valve.

[0008] Furthermore, the upper end of the rotating shaft of the motor reduction mechanism is vertically installed together with the screw rod, and the upper end of the screw rod and the lower inner side of the screw seat are connected together through threads.

[0009] Furthermore, the inner diameter of the lower end of the wire seat is larger than the outer diameter of the screw rod.

[0010] Furthermore, the outer diameters of the mold cover and the mold are consistent, and a sealing gasket is installed at the lower end of the mold cover.

[0011] Furthermore, the movable plate and the mold have the same outer shape, and the outer diameter of the movable plate is smaller than the inner diameter of the mold.

[0012] Furthermore, the outer side of the wire seat is slidably located in the middle opening of the mold and the inner annular portion of the pressure sensor.

[0013] Furthermore, the prompt circuit includes an electrically connected adjustable resistor and resistor, a transistor, and an alarm, one end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor, the other end of the second resistor is connected to the base of the transistor, the other end of the first resistor is connected to the emitter of the transistor, and the collector of the transistor is connected to the negative power input terminal of the alarm.

[0014] Compared with the prior art, the present invention has the following beneficial effects: under the joint action of relevant mechanisms, the negative pressure fan can extract the air in the mold in real time during production, reducing the probability of bubbles forming in the product, and can heat and dry the semi-finished product after molding through a hot air blower. Under the joint action of the prompt circuit and the pressure sensor, the feed can be ensured to be in an appropriate amount as much as possible, ensuring the product quality and improving the product production efficiency. In summary, the present invention has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 It is a schematic diagram of the structure of the present invention.

[0017] Figure 2 It is a circuit diagram of the present invention. DETAILED DESCRIPTION

[0018] Figure 1 , 2As shown, an active powder concrete product preparation device includes a power switch, a power module A1, a vibration motor M1, an electric linear slide M3, an electric push rod M4, a linear bearing 2 (for the up and down guide of the mold cover), a bottom plate 3, a frame 4, solenoid valves DC1 and DC2, an upper plate 5, a mold cover 6, a negative pressure fan (not shown in the figure), a hot air blower (not shown in the figure), an annular pressure sensor A2, a mold 10, and also has a lifting mechanism and a prompt circuit 7; the upper and lower ends of the four sets of frames 4 are respectively vertically welded to the lower end of the upper plate 5 and the upper end of the bottom plate 3, and the two sets of electric The linear slide M3 is distributed with a front-to-rear spacing and is fixedly installed horizontally at the lower end of the upper plate 5. Each set of electric linear slides M3 has two sliding blocks, and a support plate 8 is welded to the lower end of the sliding blocks of the two sets of electric linear slides M3; there are four sets of linear bearings 2, and the upper ends of the bearing sleeves of the four sets of linear bearings 2 are respectively installed around the lower end of the support plate 8, and the upper end of the cylinder of the electric push rod M4 is installed in the middle of the lower end of the support plate 8. The outer upper end of the mold cover 6 and the lower ends of the bearing rods of the four sets of linear bearings 2 are respectively fixed together, and the middle of the outer upper end of the mold cover 6 and the lower end of the movable column of the electric push rod M4 are installed Together, there are two solenoid valves, and a connecting pipe that communicates with the interior is welded to the upper part of both sides of the mold cover 6 respectively. The upper ends of the two connecting pipes are connected to the lower ends of the two solenoid valves DC1 and DC2 respectively through threads, and the upper ends of the two solenoid valves DC1 and DC2 are connected to the air inlet pipe of the negative pressure fan and the exhaust pipe of the hot air fan respectively through hoses with a length margin; the lifting mechanism includes a movable plate 91, a linear bearing A92 (for the upward and downward guide of the movable plate), a motor reduction mechanism M2, a screw rod 93, and a screw seat 94. A support rod 11 is welded around the lower end of the mold 10, and four support rods 11 are welded to the lower end of the mold 10. The lower end of the support rod 11 is welded to the middle part of one side of the upper end of the base plate 3. There are openings around and in the middle of the inner side of the mold 10. The bearing sleeves of the four sets of linear bearings A92 are fixedly installed in the multiple openings around the mold. The upper ends of the bearing rods of the four sets of linear bearings A92 are welded around the lower end of the movable plate 91; the upper end of the wire seat 93 is welded to the middle part of the outer lower end of the movable plate 91, the annular pressure sensor A2 is fixedly installed on the side end of the opening in the middle of the mold, the four sets of vibration motors M1 are fixedly installed around the lower end of the mold 10, and the shell of the motor reduction mechanism M2 is installed in the middle of the right side of the base plate 3.

[0019] Figure 1 , 2As shown, the solenoid valves DC1 and DC2 are normally closed valve core solenoid valves. The upper end of the rotating shaft of the motor reduction mechanism is vertically welded to the lower end of the screw rod 93, and the upper end of the screw rod 93 and the inner side of the wire seat 94 are connected together by threads. The outer diameters of the mold cover 6 and the mold 10 are consistent, and a circle of annular sealing gasket 61 is bonded to the lower end of the mold cover 6. The inner diameter of the lower end of the wire seat 94 is larger than the outer diameter of the screw rod 93. The movable plate 91 and the mold 10 have the same appearance, and the outer diameter of the movable plate 91 is slightly smaller than the inner diameter of the mold 10. The outer side of the wire seat 94 is slidably located in the middle opening of the mold 10 and the inner annular part of the pressure sensor A2. The prompt circuit includes an adjustable resistor RP1, resistors PR1 and R2, a transistor Q1, and an alarm B connected through circuit board wiring. One end of the adjustable resistor RP1 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the second resistor R2 is connected to the base of the transistor Q1. The other end of the first resistor R1 is connected to the emitter of the transistor Q1. The collector of the transistor is connected to the negative power input terminal of the alarm B.

[0020] Figure 1 , 2 As shown, the power input end of the vibration motor M1 is connected to the 220V AC power supply through a power switch S1 in series via a wire; the two ends of the running capacitor C of the motor reduction mechanism M2 are connected to the 2nd and 3rd pins of the power switch S2 via wires, and the 1st pin of the power switch S2, the main power input end of the motor reduction mechanism M2 and the 220V AC power supply are connected via wires; the power input ends of the negative pressure fan and the hot air blower are connected to the 220V AC power supply through a power switch in series via wires. The power input ends 1 and 2 of the power module A1 are connected to the two poles of the AC 220V power supply via wires, and the power output ends 3 and 4 of the power module A1 are connected to the four power switches AS4, S5, S6 (1 and 2 pins), S7 (1 and 2 pins), the power input ends 1 and 2 pins of the pressure sensor A2, the power input end of the prompt circuit, the positive power input end of the alarm B and the emitter of the transistor Q1 are connected via wires. The signal output terminal 3 of the pressure sensor A2 and the other end of the adjustable resistor RP1, the signal input terminal of the prompt circuit, are connected via wires. The power output terminals of the two power switches AS4 and S5, the 4th pin of the power module A1, and the power input terminals of the two solenoid valves DC1 and DC2 are connected via wires. In addition, the power output terminals 3, 4 and 5, 6 of the two voltage switches AS6 and S7 and the positive and negative and the negative and positive power input terminals of the two sets of electric linear slides M3 and the four sets of electric push rods M4 are connected via wires. The handle of the adjustable resistor RP1 is located at the front outer end of the component box, and the numbers representing the weight are distributed in a ring on the outer end of the ring handle.

[0021] Figure 1 , 2As shown, after the AC 220V power supply enters the 1st and 2nd pins of the power module A1, the 3rd and 4th pins of the power module A1 output a stable DC 24V power supply which enters the power input end of the pressure sensor A2 and the prompt circuit, and the sensor and the prompt circuit are powered on. The working process of this new type is as follows. (1): Before work, the staff applies demoulding oil on the inside of the mold and the mold cover, the movable plate, etc. (to facilitate subsequent demoulding). During work, the staff inputs the active powder concrete into the mold 10 through other equipment. When the amount of active powder concrete is insufficient (lower than the resistance value set by the staff through the adjustable resistor RP1), the pressure of the lower end of the movable plate 91 on the bearing surface of the pressure sensor A2 is relatively low (at this moment, the upper end of the screw rod and the lower end of the threaded part of the screw seat are separated). The 24V power supply is divided by the adjustable resistor RP1 and the resistor R1, and the resistor R2 reduces the voltage and limits the current to enter the base of the transistor Q1, which is lower than 0.7V. The transistor Q1 will not be turned on, and then the alarm B will not be powered on and sound; when When the active powder concrete is sufficient (reaching the resistance value set by the staff through the adjustable resistor RP1), the pressure of the lower end of the movable plate 91 on the bearing surface of the pressure sensor A2 is relatively high, and the 24V power supply is divided by the adjustable resistor RP1 and the resistor R1, and the resistor R2 steps down and limits the current to enter the base of the transistor Q1, which is higher than 0.7V. The transistor Q1 will conduct the collector output low level and enter the negative power input terminal of the alarm B, then the alarm B will be energized and sound. After the staff hears the prompt sound, they can intuitively know that the concrete raw materials entering the mold 10 are sufficient and timely close the input amount of concrete, preventing the adverse effects of too much or too little concrete on the product quality (stop feeding). (2) When the concrete is sufficient, turn the handle of the power switch AS6 of the four sets of electric push rods to the right, and the 1, 2 and 5, 6 feet of the power switch AS6 are connected respectively. The sliding blocks of the two sets of electric linear slides M3 drive the mold cover 6 to move to the right. After the mold cover 6 is located on the mold 10, turn off the power switch. (3) The staff turns the handle of the power switch AS7 of the four sets of electric push rods M4 to the right, and the 1, 2 and 5, 6 pins of the power switch AS7 are connected respectively. The movable columns of the four sets of electric push rods M4 drive the mold cover 6 to move downward. After the lower end of the mold cover 6 is located on the mold 10 (the sealing rubber pad at the lower end of the mold cover contacts the upper end of the mold, which plays a sealing role for the mold), the power switch is turned off. (4) After turning on the power switch of the vibration motor M1, the vibration motor M1 vibrates the concrete in the mold 10 after being energized. At the same time, the power switches of the negative pressure fan and the solenoid valve DC1 (the valve core is open) are turned on. The negative pressure fan generates a negative pressure force to suck out the air in the vibration and the mold and mold cover, reducing the probability of bubbles forming in the product and improving the quality of the finished product.(5) Continue to turn on the negative pressure fan and solenoid valve DC1, and turn on the power switches of the hot air blower and solenoid valve DC2. The hot air blower heats the semi-finished product in the mold, and the negative pressure fan discharges the heat-released air to the outside to increase the drying speed of the finished product. After drying (generally about 4 hours), turn off the power switches of the hot air blower, solenoid valves DC2 and DC1, and the negative pressure fan. (6) The staff member turns the handle of the power switch AS7 of the four sets of electric push rods M4 to the left, and the 1, 2 feet and 3, 4 feet of the power switch AS7 are connected respectively. The movable columns of the four sets of electric push rods M4 drive the mold cover 6 to move upward, and the lower end of the mold cover 6 is separated from the mold 10, and then the power switch is turned off. (7) The staff member turns the handle of the power switch AS6 of the two sets of electric linear slides M3 to the left, and the 1, 2 feet and 3, 4 feet of the power switch AS6 are connected respectively. The sliding blocks of the two sets of electric linear slides M3 drive the mold cover 6 to move to the left, and the mold cover 6 is located on the left side of the mold 10, and then the power switch is turned off (to prepare for demolding). (8) Turn the handle of the power switch S2 to the left, and the shaft of the motor reduction mechanism M2 drives the screw 93 to rotate clockwise, and the external thread of the screw 93 acts on the internal thread of the wire seat 94. Then, the movable plate 91 moves upward, and the molded product is ejected from the upper end of the mold. The staff can remove the finished product through other lifting tools, and enter the next product production process together with all the above processes (before production, turn the handle of the power switch S2 to the right, and the shaft of the motor reduction mechanism M2 drives the screw 93 to rotate counterclockwise, and the external thread of the screw 93 acts on the internal thread of the wire seat 94. After rotating to a certain position, the upper part of the screw is located at the position with the largest inner diameter at the lower end of the wire seat. Then, the movable plate 91 moves downward and returns to the initial position, and the lower end of the movable plate contacts the force surface of the pressure sensor).

[0022] Figure 1 , 2As shown, through the combined action of all the above mechanisms, the negative pressure fan of the present invention can extract the air in the mold in real time, reducing the probability of bubbles forming in the product, and can heat and dry the semi-finished product after forming through the hot air blower. Under the combined action of the prompt circuit and the pressure sensor, the feed can be ensured to be in the appropriate amount as much as possible, ensuring the product quality and improving the product production efficiency. The adjustable resistor RP1 resistance is 470K (the larger the resistance is adjusted, the more concrete will enter the mold later, and the alarm B will be energized to sound, that is, the weight threshold is set relatively large, otherwise the weight threshold is set relatively small). The model of transistor Q1 is 9013 (NPN); alarm B is an active continuous sound alarm product of model FM24V; the resistance values ​​of resistors R1 and R2 are 5K and 20K respectively; the motor reduction mechanism M2 is a coaxial motor gear reducer with a power of 3KW; the electric push rod M4 is a reciprocating electric telescopic rod product with a power of 100W; the power of solenoid valves DC1 and DC2 is 2W; the power of vibration motor M1 is 1KW; the power module A1 is an AC 220V to DC 24V power module product; the electric linear slide M3 is a 1.2KW electric screw slide product; the annular pressure sensor A2 model is JHBM-4, with two power input terminals and one signal output terminal.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An active powder concrete product preparation device, comprising a vibration motor, an electric linear slide, an electric push rod, a linear bearing, a bottom plate, a frame, a solenoid valve, an upper plate, a mold cover, a negative pressure fan, a hot air blower, a pressure sensor, and a mold, characterized in that , it also has a lifting mechanism and a prompt circuit; the frame has multiple sets, and the upper and lower ends of the multiple sets of frames are respectively installed around the lower end of the upper plate and the upper end of the bottom plate, the electric linear slide is installed at the lower end of the upper plate, and the lower end of the sliding block of the electric linear slide is installed with a support plate, the upper ends of multiple sets of linear bearings and the upper ends of the electric push rods M are installed at the lower end of the support plate, the upper end of the mold cover and the lower ends of the multiple sets of linear bearings and the lower ends of the electric push rods are installed together, there are at least two solenoid valves, and connecting pipes are respectively installed on both sides of the mold cover, the upper ends of the two connecting pipes are respectively connected to the lower ends of the two solenoid valves, and the upper ends of the two solenoid valves are respectively connected to the air inlet pipe of the negative pressure fan and the exhaust pipe of the hot air blower through hoses; the lifting mechanism includes an active A movable plate, a linear bearing A, a motor reduction mechanism, a screw rod, and a screw seat. Support rods are installed around the lower end of the mold, and the lower ends of multiple support rods are respectively installed on one side of the upper end of the bottom plate. There are openings around the inner side and the middle of the mold. Multiple sets of linear bearing A bearing sleeves are fixedly installed in multiple openings around the mold, and the upper ends of the bearing rods of multiple sets of linear bearings A are respectively installed around the lower end of the movable plate; the upper end of the screw seat is installed in the middle of the lower end outside the movable plate, the pressure sensor is fixedly installed on the side end of the opening in the middle of the mold, the vibration motor is installed at the lower end outside the mold, and the housing of the motor reduction mechanism is installed on the bottom plate; the signal output end of the pressure sensor is electrically connected to the signal input end of the prompt circuit.

2. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The solenoid valve is a normally closed spool solenoid valve.

3. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The upper end of the rotating shaft of the motor reduction mechanism is vertically installed with the screw rod, and the upper end of the screw rod and the lower inner side of the screw seat are connected together through threads.

4. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The inner diameter of the lower end of the wire seat is larger than the outer diameter of the wire rod.

5. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The outer diameters of the mold cover and the mold are consistent, and a sealing gasket is installed at the lower end of the mold cover.

6. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The movable plate and the mold have the same shape, and the outer diameter of the movable plate is smaller than the inner diameter of the mold.

7. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The outer side of the wire seat is slidably located in the middle opening of the mold and the inner annular portion of the pressure sensor.

8. The device for preparing a reactive powder concrete product according to claim 1, characterized in that: The prompt circuit includes an electrically connected adjustable resistor and a resistor, a transistor, and an alarm. One end of the adjustable resistor is connected to one end of the first resistor and one end of the second resistor. The other end of the second resistor is connected to the base of the transistor. The other end of the first resistor is connected to the emitter of the transistor. The collector of the transistor is connected to the negative power input end of the alarm.

Images