CN108638288B - An air pump-driven feed controller suitable for 3D molding of large geological models - Google Patents

Abstract

An air pump-driven feeding controller suitable for 3D molding of large-scale geological models, including an air compressor, a pneumatic control valve group, a feeding control host, a feeding control valve and a discharging control valve; the feeding control host is divided into a drive-level body and a For the feeding stage body, the two bodies are fixedly connected by an adapter flange; there are pistons in the two bodies, the two pistons are fixedly connected by a piston rod, and the piston rod seal runs through the adapter flange; there are two air ports on the driving stage body and corresponding to its rod cavity or rodless cavity respectively; the pneumatic control valve group is connected to the two air ports respectively through two ventilation pipes; the air compressor is connected to the pneumatic control valve group; the rod cavity of the driving stage body is provided with a displacement sensor , one end is fixedly connected with the adapter flange, and the other end is fixedly connected with the piston rod; the feeding stage body is provided with a pressure balance ventilation hole corresponding to its rod cavity, and a feed port and a discharge port corresponding to its rodless cavity; The feed control valve is connected with the feed port through the feed pipe, and the discharge control valve is connected with the discharge port through the discharge pipe.

Description

An air pump-driven feed controller suitable for 3D molding of large geological models

technical field

The invention belongs to the technical field of large-scale three-dimensional physical model preparation, in particular to an air pump-driven feeding controller suitable for 3D forming of large-scale geological models.

Background technique

Simulation of natural rock mass engineering excavation process through physical model test is an important method for predicting and forecasting large-scale rock mass engineering geological disasters. The geological model needs to be made of similar materials of rock mass, and the similar materials of rock mass are usually composed of cement, gypsum, sand, iron powder and barite. The stirred rock mass-like material is supplied to the 3D molding machine by the pumping equipment for use.

At present, the similar materials of the mixed rock mass are mainly conveyed by two kinds of pumping equipment, including screw conveyor and plunger conveyor. However, both of the existing two types of pumping equipment cannot accurately control the discharge amount, and the adjustable ability of the discharge amount is weak; when the pumping work is completed, the pumping equipment is not easy to disassemble and clean.

SUMMARY OF THE INVENTION

In view of the problems existing in the prior art, the present invention provides an air pump-driven feeding controller suitable for 3D molding of large-scale geological models, which can be used to replace traditional screw conveyors and plunger conveyors. The amount of material and the ability to adjust the amount of material output are strong; when the pumping work is completed, the feeding controller can be disassembled, which is more convenient for cleaning.

In order to achieve the above purpose, the present invention adopts the following technical scheme: an air pump-driven feeding controller suitable for 3D molding of large-scale geological models, including an air compressor, a pneumatic control valve group, a feeding control host, a feeding control valve and a discharging control valve. control valve; the feeding control host is divided into a driving stage body and a feeding stage body, and the driving stage body and the feeding stage body are fixedly connected by an adapter flange; a driving stage piston is arranged in the driving stage body to drive the The stage piston and the driving stage body are in sealing and sliding fit; the feeding stage body is provided with a feeding stage piston, and the feeding stage piston and the feeding stage body are in sealing sliding fit; the driving stage piston and the feeding stage piston pass through the piston rod The piston rod is sealed through the adapter flange, and a linear bearing is installed between the piston rod and the adapter flange; a first air port is opened on the rod cavity shell of the driving stage body, The pneumatic control valve group is connected with the first ventilation port through a first ventilation pipe; a second ventilation port is opened on the rodless cavity shell of the driving stage body, and the pneumatic control valve group passes through the second ventilation pipe Connected with the second air port; the air compressor is connected with the pneumatic control valve group through the high-pressure air delivery pipe; a rod-type displacement sensor is arranged in the rod-bearing cavity of the driving stage body, and the rod-type displacement sensor is connected to the piston rod. In parallel, one end of the pull rod type displacement sensor is fixed on the adapter flange, and the other end of the pull rod type displacement sensor is fixed on the piston rod through the adapter frame; the rod cavity shell of the feeding stage body is provided with a pressure balance ventilation A feeding port and a discharging port are respectively provided on the rodless cavity shell of the feeding stage body; the feeding control valve is connected with the feeding port through a feeding pipe, and the discharging control valve The tube is connected to the outlet.

The pneumatic control valve group includes a first pressure regulating valve, a first pressure valve, a first exhaust valve, a second pressure regulating valve, a second pressure valve and a second exhaust valve; the inlet of the first pressure regulating valve is The air end is connected to the air compressor through a high-pressure air delivery pipe, the air outlet end of the first pressure regulating valve is connected to the first ventilation pipe through the first pressure valve, and the other way is connected to the atmosphere through the first exhaust valve; the second The inlet end of the pressure regulating valve is connected to the air compressor through a high-pressure air delivery pipe, the outlet end of the second pressure regulating valve is connected to the second ventilation pipe through the second pressure valve, and the other is connected to the atmosphere through the second exhaust valve .

The first pressure regulating valve and the second pressure regulating valve have the same structure, including a valve body, a driving motor, a driving gear and a driven gear; the driving motor is fixed on the valve body, and the driving gear is fixedly sleeved on the driving on the motor shaft of the motor; the driven gear is fixedly sleeved on the valve core rod body of the valve body, and the driven gear meshes with the driving gear; the output torque of the driving motor drives the driving gear and the driven gear to rotate in turn, which is used for Adjust the opening of the spool in the valve body.

The feed control valve and the discharge control valve have the same structure, including a valve housing, a hose, a shutoff rod, a steering gear, a driving wheel and a driving spring; the hose is located at the bottom of the inner side of the valve housing, and both ends of the hose are connected There is an adapter nut; the steering gear is fixed on the top of the valve shell, and the driving wheel is eccentrically fixed on the motor shaft of the steering gear; one end of the intercepting rod is abutted against the outer periphery of the wheel disc of the driving wheel, and the other is the intercepting rod. One end is in contact with the outer tube wall of the hose; the driving spring is located inside the valve shell, the driving spring is parallel to the shut-off rod, one end of the driving spring is fixedly connected to the valve casing, and the other end of the driving spring is connected to the shut-off rod through the adapter rod The rods are fixedly connected; the intercepting rod is driven to perform linear motion by the steering gear or the driving spring, which is used to adjust the opening and closing of the hose lumen.

Beneficial effects of the present invention:

The air pump-driven feeding controller suitable for 3D forming of large-scale geological models of the present invention can be used to replace traditional screw conveyors and plunger conveyors, and can precisely control the discharge amount, and the discharge amount can be adjusted. Strong ability; when the pumping work is finished, the feeding controller can be disassembled, which is more convenient for cleaning.

Description of drawings

1 is a schematic structural diagram of an air pump-driven feeding controller suitable for 3D molding of large-scale geological models of the present invention;

Fig. 2 is the structural representation of the feeding control host of the present invention;

3 is a schematic structural diagram of the pneumatic control valve group of the present invention;

4 is a schematic structural diagram of the first pressure regulating valve/second pressure regulating valve of the present invention;

Fig. 5 is the structural representation of the feed control valve/discharge control valve of the present invention;

In the figure, 1—air compressor, 2—pneumatic control valve group, 3—feeding control host, 4—feeding control valve, 5—discharging control valve, 6—drive level body, 7—feeding level body, 8— Driving stage piston, 9-feeding stage piston, 10-piston rod, 11-linear bearing, 12-rod cavity of driving stage body, 13-first air port, 14-first ventilation pipe, 15-driving stage body Rodless cavity, 16—second air port, 17—second air pipe, 18—high pressure air delivery pipe, 19—draw-rod displacement sensor, 20—adapter, 21—rod cavity of feed-level body, 22—pressure Balanced ventilation holes, 23—the rodless cavity of the feed-level body, 24—the feed port, 25—the discharge port, 26—the feed pipe, 27—the discharge pipe, 28—the first pressure regulating valve, 29—the first Pressure valve, 30—first exhaust valve, 31—second pressure regulating valve, 32—second pressure valve, 33—second exhaust valve, 34—valve body, 35—drive motor, 36—drive gear, 37 — driven gear, 38 — valve housing, 39 — hose, 40 — shutoff rod, 41 — steering gear, 42 — drive wheel, 43 — drive spring, 44 — adapter nut, 45 — adapter rod, 46 — turn Flange, 47—quick connector.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figures 1 to 5, an air pump-driven feeding controller suitable for 3D forming of large-scale geological models includes an air compressor 1, a pneumatic control valve group 2, a feeding control host 3, a feeding control valve 4 and a discharging control valve. control valve 5; the feeding control host 3 is divided into a driving stage body 6 and a feeding stage body 7, and the driving stage body 6 and the feeding stage body 7 are fixedly connected by an adapter flange 46; in the driving stage body 6 A driving stage piston 8 is arranged inside, and the driving stage piston 8 and the driving stage body 6 are in a sealed sliding fit; a feeding stage piston 9 is arranged in the feeding stage body 7, and the feeding stage piston 9 and the feeding stage body 7 are in a sealed sliding fit. ; The driving stage piston 8 and the feeding stage piston 9 are fixedly connected by the piston rod 10, the piston rod 10 is sealed through the adapter flange 46, and a straight line is installed between the piston rod 10 and the adapter flange 46 Bearing 11; a first vent 13 is opened on the housing of the rod cavity 12 of the driving stage body 6, and the pneumatic control valve group 2 is connected with the first vent 13 through the first vent pipe 14; The rodless cavity 15 of the driving stage body 6 is provided with a second air port 16, and the pneumatic control valve group 2 is connected to the second air port 16 through a second air pipe 17; the air compressor 1 passes through The high-pressure gas pipeline 18 is connected with the pneumatic control valve group 2; a rod-type displacement sensor 19 is arranged in the rod-bearing cavity 12 of the driving stage body 6, and the rod-type displacement sensor 19 is parallel to the piston rod 10. The rod-type displacement sensor One end of 19 is fixed on the adapter flange 46, and the other end of the pull rod type displacement sensor 19 is fixed on the piston rod 10 through the adapter frame 20; on the shell of the rod cavity 21 of the feeding stage body 7, there is a pressure balance ventilation Hole 22; a feeding port 24 and a feeding port 25 are respectively opened on the shell of the rodless cavity 23 of the feeding stage body 7; the feeding control valve 4 is connected with the feeding port 24 through the feeding pipe 26 , the discharge control valve 5 is connected with the discharge port 25 through the discharge pipe 27 .

The pneumatic control valve group 2 includes a first pressure regulating valve 28, a first pressure valve 29, a first exhaust valve 30, a second pressure regulating valve 31, a second pressure valve 32 and a second exhaust valve 33; the The air inlet end of the first pressure regulating valve 28 is connected to the air compressor 1 through the high pressure air delivery pipe 18, the air outlet end of the first pressure regulating valve 28 is connected to the first ventilation pipe 14 through the first pressure valve 29, and the other way is connected to the first ventilation pipe 14 through the first pressure valve 29. An exhaust valve 30 is communicated with the atmosphere; the intake end of the second pressure regulating valve 31 is connected to the air compressor 1 through the high-pressure air delivery pipe 18 , and the outlet end of the second pressure regulating valve 31 all the way through the second pressure valve 32 It is connected to the second vent pipe 17 , and the other is connected to the atmosphere through the second exhaust valve 33 .

The first pressure regulating valve 28 and the second pressure regulating valve 31 have the same structure, including a valve body 34, a driving motor 35, a driving gear 36 and a driven gear 37; the driving motor 35 is fixedly mounted on the valve body 34, The driving gear 36 is fixedly sleeved on the motor shaft of the driving motor 35; the driven gear 37 is fixedly sleeved on the valve core rod body of the valve body 34, and the driven gear 37 is meshed with the driving gear 36; output through the driving motor 35 The torque drives the driving gear 36 and the driven gear 37 to rotate in turn, and is used to adjust the opening of the valve core in the valve body 34 .

The feed control valve 4 and the discharge control valve 5 have the same structure, including a valve housing 38, a hose 39, a shut-off rod 40, a steering gear 41, a drive wheel 42 and a drive spring 43; the hose 39 is located in the valve housing At the bottom of the inner side of 38, both ends of the hose 39 are connected with adapter nuts 44; the steering gear 41 is fixedly mounted on the top of the valve housing 38, and the driving wheel 42 is eccentrically fixed on the motor shaft of the steering gear 41; the shutoff rod 40 One end is in contact with the outer periphery of the disk of the driving wheel 42, and the other end of the shut-off rod 40 is in contact with the outer tube wall of the hose 39; the driving spring 43 is located inside the valve housing 38, and the driving spring 43 and the shut-off rod 40 are parallel to each other, one end of the driving spring 43 is fixedly connected to the valve housing 38, and the other end of the driving spring 43 is fixedly connected to the intercepting rod 40 through the adapter rod 45; It is used to adjust the opening and closing of the lumen of the hose 39.

Describe an application process of the present invention below in conjunction with accompanying drawing:

Start the steering gear 41 of the feed control valve 4, drive the drive wheel 42 to rotate eccentrically, and move the shut-off rod 40 upward under the action of the drive spring 43, so that the lumen of the hose 39 is fully opened; at the same time, start the discharge control valve 5 of the steering gear 41, thereby converting the eccentric rotation of the driving wheel 42 into a linear motion of the blocking rod 40, so that the blocking rod 40 moves downward, thereby completely closing the lumen of the hose 39. At this time, the feed control valve 4 is in an open state, and the discharge control valve 5 is in a closed state.

Start the air compressor 1, open the first pressure regulating valve 28, the first pressure valve 29, the second pressure valve 32 and the second exhaust valve 33, and close the first exhaust valve 30 and the second pressure regulating valve 31; At this time, the high-pressure air output from the air compressor 1 will enter the rod cavity 12 of the driving stage body 6 through the first pressure regulating valve 28 , the first pressure valve 29 and the first ventilation pipe 14 in sequence, while the rodless cavity 12 of the driving stage body 6 The air in the cavity 15 will be discharged into the atmosphere through the second vent pipe 17 , the second pressure valve 32 and the second exhaust valve 33 in sequence.

With the continuous air supply of the air compressor 1, the pressure of the rod cavity 12 of the driving stage body 6 gradually increases, and pushes the driving stage piston 8 to move to the rodless cavity, and the moving distance of the driving stage piston 8 is directly through the rod-type displacement The sensor 19 measures in real time.

With the movement of the driving stage piston 8, the piston rod 10 and the feeding stage piston 9 will be driven to move synchronously, so that the rod cavity 21 of the feeding stage body 7 is compressed, and the air in the cavity will be directly discharged through the pressure balance ventilation hole 22. In the atmosphere, at the same time, the rodless cavity 23 of the feeding stage body 7 will exhibit negative pressure, and under the action of the negative pressure, similar materials will be sucked into the rodless cavity 23 of the feeding stage body 7 until the rod-type displacement sensor 19 monitors the piston. When the moving distance reaches the set value, the first pressure regulating valve 28 is closed at this time, and the feeding process ends.

Next, the discharging process is performed. First, the feeding control valve 4 is closed, and the discharging control valve 5 is opened. At the same time, the second pressure regulating valve 31 and the first exhaust valve 30 are opened, and the second exhaust valve 33 is closed at the same time; The high-pressure air output from the compressor 1 will enter the rodless cavity 15 of the driving stage body 6 through the second pressure regulating valve 31 , the second pressure valve 32 and the second ventilation pipe 17 in sequence, while the rod cavity 12 of the driving stage body 6 The air inside will be discharged into the atmosphere through the first vent pipe 14 , the first pressure valve 29 and the first exhaust valve 30 in sequence.

With the continuous air supply of the air compressor 1, the pressure of the rodless cavity 15 of the driving stage body 6 gradually increases, and pushes the driving stage piston 8 to move toward the rod cavity, and the moving distance of the driving stage piston 8 is directly through the rod-type displacement The sensor 19 measures in real time.

With the movement of the driving stage piston 8, the piston rod 10 and the feeding stage piston 9 will be driven to move synchronously, so that the rodless cavity 23 of the feeding stage body 7 is compressed. Under the action of pressure, the rodless cavity 23 of the feeding stage body 7 is compressed. The similar materials inside will be discharged through the discharge pipe 27, and at the same time, the rod cavity 21 of the feeding stage body 7 sucks air through the pressure balance ventilation hole 22 to increase the volume of the cavity until the piston movement distance monitored by the pull rod displacement sensor 19 reaches. If the set value is set, the second pressure regulating valve 31 is closed at this time, and the discharging process ends.

During the feeding and discharging process, the opening of the valve core in the valve body 34 of the first pressure regulating valve 28 or the second pressure regulating valve 31 can be adjusted to adjust the flow rate of the high-pressure air supply, thereby realizing the adjustment of the high-pressure air supply flow. Adjustment of feeding and discharging speed.

The solutions in the embodiments are not intended to limit the scope of the patent protection of the present invention, and all equivalent implementations or modifications that do not depart from the present invention are included in the scope of the patent of this case.

Claims (1)

1. an air pump-driven feeding controller suitable for 3D molding of a large-scale geological model is characterized in that: comprising an air compressor, a pneumatic control valve group, a feeding control host, a feeding control valve and a discharging control valve; the feeding The control host is divided into a driving stage body and a feeding stage body, and the driving stage body and the feeding stage body are fixedly connected by an adapter flange; a driving stage piston is arranged in the driving stage body, and the driving stage piston and the driving stage body are arranged. For sealing and sliding cooperation; a feeding level piston is arranged in the feeding level body, and the feeding level piston and the feeding level body are sealed and sliding; the driving level piston and the feeding level piston are fixedly connected by a piston rod, and the piston rod The seal penetrates through the adapter flange, and a linear bearing is installed between the piston rod and the adapter flange; a first air port is opened on the rod cavity shell of the driving stage body, and the pneumatic control valve group The first vent is connected to the first vent; the rodless cavity housing of the driving stage body is provided with a second vent, and the pneumatic control valve group is connected to the second vent through the second vent. connection; the air compressor is connected with the pneumatic control valve group through the high-pressure air delivery pipe; a rod-type displacement sensor is arranged in the rod-bearing cavity of the driving stage body, the rod-type displacement sensor is parallel to the piston rod, and the rod-type displacement sensor One end of the sensor is fixed on the adapter flange, and the other end of the rod-type displacement sensor is fixed on the piston rod through the adapter frame; a pressure balance ventilation hole is opened on the rod cavity shell of the feeding stage body; The rodless cavity shell of the stage body is respectively provided with a feeding port and a discharging port; the feeding control valve is connected with the feeding port through the feeding pipe, and the discharging control valve is connected with the discharging port through the discharging pipe. connection; the pneumatic control valve group includes a first pressure regulating valve, a first pressure valve, a first exhaust valve, a second pressure regulating valve, a second pressure valve and a second exhaust valve; the first pressure regulating valve The air inlet end of the first pressure regulating valve is connected to the air compressor through a high-pressure air delivery pipe, the air outlet end of the first pressure regulating valve is connected to the first ventilation pipe through the first pressure valve, and the other way is connected to the atmosphere through the first exhaust valve; The intake end of the second pressure regulating valve is connected to the air compressor through a high-pressure air delivery pipe, the outlet end of the second pressure regulating valve is connected to the second ventilation pipe through the second pressure valve, and the other way is connected to the atmosphere through the second exhaust valve The first pressure regulating valve and the second pressure regulating valve have the same structure, including a valve body, a driving motor, a driving gear and a driven gear; the driving motor is fixed on the valve body, and the driving gear is fixed The driven gear is sleeved on the motor shaft of the driving motor; the driven gear is fixedly sleeved on the valve core rod body of the valve body, and the driven gear is meshed with the driving gear; the output torque of the driving motor drives the driving gear and the driven gear to rotate in turn , used to adjust the opening of the valve core in the valve body; the feed control valve and the discharge control valve have the same structure, including a valve shell, a hose, a shutoff rod, a steering gear, a drive wheel and a drive spring; the hose It is located at the bottom of the inner side of the valve shell, and both ends of the hose are connected with adapter nuts; the steering gear is fixed on the top of the valve casing, and the driving wheel is eccentrically fixed on the motor shaft of the steering gear; On the outer periphery of the disc of the driving wheel, the other end of the shut-off rod is connected to the end of the hose. The outer tube wall is abutted against contact; the drive spring is located inside the valve shell, the drive spring is parallel to the shut-off rod, one end of the drive spring is fixedly connected to the valve casing, and the other end of the drive spring is fixedly connected to the shut-off rod through an adapter rod; The shut-off rod is driven to perform linear motion by the steering gear or the driving spring, which is used to adjust the opening and closing of the hose lumen.

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