CN107497254A - Double-tower dryer - Google Patents

Abstract

The invention relates to a double-tower dryer which comprises a first drying cylinder (1) and a second drying cylinder (2), wherein a first pressure indicator (3) is arranged at the top of the first drying cylinder (1), and a second pressure indicator (4) is arranged at the top of the second drying cylinder (2). Compared with the prior art, the invention has the beneficial effects that: the structure is compact, and the volume is smaller under the same use parameters. Through the pressure indicator that sets up respectively at the top of two tower drying drums, can observe in real time and conveniently discern the behavior of two tower drying drums, guarantee to dismantle change work safely when two tower drying drums need maintain. The heater arranged above the exhaust valve on the double-tower drying cylinder can meet the requirement of normal use at the low temperature of 40 ℃ below zero. Through the pressure sensor who sets up on two tower drying drums, can real time monitoring, judge, feed back whether normal information of switching mode between first drying drum and the second drying drum to in time send out the warning and effectively troubleshooting.

Description

Double Tower Dryer

technical field

The invention relates to a drier, in particular to a double-tower drier.

Background technique

In the air source system of rail vehicles, the air output by the compressor contains a lot of water vapor, so it needs to be dried before entering the air storage tank, so as to provide clean and dry compressed air for the subsequent system. However, if the function of the dryer fails, the entire air path will be mixed with a large amount of water, which will seriously affect the normal work of various structural components that need air, such as brake systems, bagpipes, door systems, suspension systems, etc. Will corrode some parts. If freezing occurs at low temperatures below zero, it will cause greater risks and safety hazards to these components and systems. In addition, the dryers currently used in vehicles have many disadvantages in terms of logic control, such as dryer work efficiency, service life, air resistance, etc., which do not meet the development goals and requirements of small size and high parameter indicators. Therefore, there is an urgent need to improve existing dryers.

The Chinese utility model patent No. ZL201520686212.X discloses a double-tower dryer, which belongs to the field of drying equipment, including an air compressor, a main air cylinder, a drying tower, a valve plate assembly and an electric control system; the air compressor The machine, the main air cylinder and the drying tower are all arranged on the valve plate assembly. The drying tower includes A tower and B tower arranged at intervals, and the A tower and B tower are equipped with a filter part and a central air pipe connected to each other. This double-tower dryer can continuously dry and filter the air, and continuously deliver dry and clean air to the main air cylinder; and it has many advantages such as simple structure and lower cost. However, there are no pressure indicators in the towers A and B of this utility model, so it is impossible to observe and identify the working conditions of the left and right towers in real time, and it is impossible to ensure that the left and right towers can be disassembled and replaced safely when maintenance is required. When the left and right towers are switched or when the drying tower needs maintenance, it is not conducive to switching and maintenance operations because the pressure in the left and right towers cannot be monitored in real time. At the same time, the utility model does not arrange heaters and temperature sensors next to the two exhaust valves of the left and right towers, resulting in low efficiency of the dryer. Furthermore, the utility model does not install pressure sensors at the inlet valves of the left and right towers, so it cannot monitor, judge, and feed back information on whether the switching mode of the left and right towers is normal. Therefore urgently need to improve.

Contents of the invention

In order to solve the technical defect that the above-mentioned existing double-tower drier exists, the technical scheme that the present invention adopts is as follows:

The double-tower dryer includes a first drying cylinder and a second drying cylinder, the top of the first drying cylinder is provided with a first pressure indicator, and the top of the second drying cylinder is provided with a second pressure indicator.

Preferably, a first exhaust valve is provided on the bottom side of the first drying cylinder, and a first heater is provided above the first exhaust valve.

In any of the above solutions, preferably, a second exhaust valve is provided on the bottom side of the second drying cylinder, and a temperature sensor and a second heater are arranged side by side above the second exhaust valve.

In any of the above solutions, it is preferred that a first exhaust port and a first air intake valve are respectively provided on the left and right sides of the lower part of the first drying cylinder, and a first pressure sensor is provided below the first air intake valve. .

In any of the above solutions, it is preferred that a second air intake valve and a second exhaust port are respectively provided on the left and right sides of the lower part of the second drying cylinder, and a second pressure sensor is provided under the second air intake valve. .

In any of the above schemes, it is preferred that a first check valve is provided at the center bottom of the first drying cylinder, the left side of the first check valve is the first exhaust valve, and the first A first output port is opened on the left side of the exhaust valve.

In any of the above schemes, it is preferred that a second check valve is provided at the center bottom of the second drying cylinder, the second check valve is on the right side of the second exhaust valve, and the second There is a second output port on the right side of the exhaust valve.

In any of the above schemes, preferably, a controller, a first electromagnetic valve and a second electromagnetic valve are arranged in the middle between the first drying cylinder and the second drying cylinder, and the controller is connected with the The first solenoid valve is connected to the second solenoid valve.

In any of the solutions above, preferably, a first input port is opened between the outer wall on the right side of the first drying cylinder and the left side of the first solenoid valve.

In any of the solutions above, preferably, a second input port is opened between the left outer wall near the second drying cylinder and the right side of the second solenoid valve.

In any of the above schemes, preferably, a pre-control valve is arranged at the bottom of the center between the first drying cylinder and the second drying cylinder.

In any of the above schemes, preferably, the controller includes a single-chip microcomputer, a first pressure sensor, a second pressure sensor and a temperature sensor, and the first pressure sensor, the second pressure sensor and the temperature sensor are respectively connected to the single-chip microcomputer. connect.

In any of the above schemes, preferably, the pressure indicator includes a valve rod, an adjusting nut, an anti-rotation washer, a lower spring seat, a spring, an upper spring seat and a valve body, and a valve body is provided on the lower end surface of the valve body. A central hole, a downwardly extending annular boss is arranged around the central hole, and the central hole is the inner hole of the annular boss.

In any of the above schemes, preferably, the upper end of the valve rod passes through the inner hole of the annular boss and is inserted upward into the inner cavity of the valve body to connect with the valve mechanism, and the lower end of the valve rod is provided with an outer thread, the adjusting nut is screwed on the external thread at the lower end of the valve rod.

In any of the above schemes, it is preferred that the anti-rotation washer is set on the valve rod and located above the adjusting nut, and the lower spring seat is set on the valve rod and located on the anti-rotation washer The upper spring seat is set on the outside of the annular boss, the spring is sleeved on the valve rod, the upper end of the spring is against the upper spring seat, and the lower end of the spring is against the seat. Describe the spring seat.

In any of the above schemes, preferably, a cylinder extending downward is provided on the lower end surface of the valve body, and the upper end of the cylinder is connected as a whole with the lower end surface of the valve body through integral processing, The cylinder is coaxial with the valve rod, and the cylinder is provided with one to four indicator grooves extending axially along the cylinder and uniformly distributed along the circumference, and on both sides of the indicator groove there are Indicating scale.

In any of the above schemes, it is preferred to include a pointer, the pointer is composed of a lower ring connected to an upper broken line needle, the broken line needle is composed of an upper horizontal section and a lower vertical section, and the broken line needle The lower end of the vertical section is welded as a whole with the outer edge of the ring, and the ring at the lower part of the pointer is located between the lower surface of the lower spring seat and the upper surface of the anti-rotation washer, and the pointer The horizontal section of the broken line needle is located in the cylinder, and the end of the horizontal section of the broken line needle of the pointer protrudes from one of the indicating grooves.

In any solution above, preferably, the first pressure sensor is replaced by a first pressure switch, and the second pressure sensor is replaced by a second pressure switch.

In any of the above schemes, preferably, the temperature sensor is replaced by a temperature switch.

The beneficial effects of the present invention compared with the prior art are: firstly, the present invention can observe in real time and conveniently identify the The working condition of the double-tower drying cylinder ensures that the double-tower drying cylinder can be disassembled and replaced safely when maintenance is required. Secondly, the present invention adopts the first heater arranged above the first exhaust valve on the first drying cylinder, and the temperature sensor and the second heater arranged side by side above the second exhaust valve on the second drying cylinder , can meet the normal use at low temperature -40 ℃. Again, the present invention can real-time monitor, Judging and feeding back information on whether the switching mode between the first drying cylinder and the second drying cylinder is normal, and when there is a failure in switching between the first drying cylinder and the second drying cylinder, an alarm message can be issued in time to eliminate the switching in time Fault. The invention has compact structure and smaller volume under the same use parameters.

Description of drawings

Fig. 1 is the perspective view of a preferred embodiment as double tower drier of the present invention;

Figure 2 is an electrical wiring diagram of the embodiment shown in Figure 1 of the double tower dryer according to the invention.

Explanation of reference signs:

1 first drying cylinder; 2 second drying cylinder; 3 first pressure indicator; 4 second pressure indicator; 5 first air intake valve; 6 second air intake valve; 7 first check valve; 8 second Check valve; 9 the first heater; 10 the second heater; 11 the first exhaust valve; 12 the second exhaust valve; 13 the first pressure sensor; 14 the second pressure sensor; 15 the first solenoid valve; 16 the first 2 solenoid valve; 17 controller; 18 pre-control valve; 19 temperature sensor; 20 first input port; 21 second input port; 22 first output port; 23 second output port; 24 first exhaust port; 25 second Two exhaust ports; 26 air intake direction; 27 regeneration direction; 28 control direction; 29 temperature switch; 30 single-chip microcomputer.

detailed description

This embodiment is only a preferred technical solution, and the various components and connection relationships involved are not limited to the following implementation described in this embodiment. The configuration and connection relationship of the various components in the preferred solution can be Carry out arbitrary permutations and combinations to form a complete technical solution.

Below in conjunction with Fig. 1, 2 describe in detail the technical scheme of described twin-tower drier:

The double-tower dryer includes a first drying cylinder 1 and a second drying cylinder 2 , a first pressure indicator 3 is arranged on the top of the first drying cylinder 1 , and a second pressure indicator 4 is arranged on the top of the second drying cylinder 2 . A first exhaust valve 11 is arranged on the bottom side of the first drying cylinder 1 , and a first heater 9 is arranged above the first exhaust valve 11 . A second exhaust valve 12 is provided on the bottom side of the second drying cylinder 2 , and a temperature sensor 19 and a second heater 10 are arranged side by side above the second exhaust valve 12 . The left and right sides of the lower part of the first drying cylinder 1 are respectively provided with a first exhaust port 24 and a first air inlet valve 5 , and a first pressure sensor 13 is arranged below the first air inlet valve 5 . The left and right sides of the lower part of the second drying cylinder 2 are respectively provided with a second intake valve 6 and a second exhaust port 25 , and a second pressure sensor 14 is provided below the second intake valve 6 .

A first check valve 7 is installed at the center bottom of the first drying cylinder 1 . The left side of the first check valve 7 is a first exhaust valve 11 , and a first output port 22 is opened on the left side of the first exhaust valve 11 . A second check valve 8 is provided at the center bottom of the second drying cylinder 2 . The second check valve 8 is on the right side of the second exhaust valve 12 , and the second outlet valve 12 is opened on the right side with a second output port 23 .

A controller 17, a first solenoid valve 15 and a second solenoid valve 16 are arranged in the middle between the first drying cylinder 1 and the second drying cylinder 2, and the controller 17 is connected with the first solenoid valve 15 and the second solenoid valve respectively. 16 phase connections. A first input port 20 is opened between the outer wall on the right side close to the first drying cylinder 1 and the left side of the first electromagnetic valve 15 . A second input port 21 is opened between the left outer wall near the second drying cylinder 2 and the right side of the second solenoid valve 16 . A pre-control valve 18 is provided at the bottom of the center between the first drying cylinder 1 and the second drying cylinder 2 . Controller 17 comprises single-chip microcomputer 30, the first pressure sensor 13, the second pressure sensor 14 and temperature sensor 19, and the first pressure sensor 13, the second pressure sensor 14 and temperature sensor 19 are connected with single-chip microcomputer 30 respectively, and temperature sensor 19 can select Replaced by temperature switch 29.

The pressure indicator includes a valve rod, an adjusting nut, an anti-rotation washer, a lower spring seat, a spring, an upper spring seat and a valve body, a central hole is arranged on the lower end surface of the valve body, and a There is a downwardly extending annular boss around, the central hole is the inner hole of the annular boss, and the upper end of the shutter rod is inserted upward into the inner hole of the valve body through the inner hole of the annular boss. The cavity is connected with the valve mechanism, the lower end of the valve rod is provided with an external thread, the adjusting nut is screwed on the external thread at the lower end of the valve rod, the anti-rotation washer is set on the valve rod and located on the On the top of the adjusting nut, the lower spring seat is sleeved on the valve rod and located on the top of the anti-rotation washer, the upper spring seat is sleeved on the outside of the annular boss, and the spring is sleeved on the valve On the rod, the upper end of the spring withstands the upper spring seat, the lower end of the spring withstands the lower spring seat, and a cylinder extending downward is provided on the lower end surface of the valve body. The upper end of the cylinder and the lower end surface of the valve body are connected as a whole through integral processing, the cylinder is coaxial with the valve rod, and there are one to four valves extending axially along the cylinder on the cylinder. There are indicator grooves evenly distributed along the circumference, and there are indicator scales on both sides of the indicator groove, including a pointer. The pointer is connected by the lower ring and the upper broken line needle. Section and the vertical section of the lower part, the lower end of the vertical section of the broken line needle is welded as a whole with the outer edge of the ring, and the ring at the lower part of the pointer is located on the lower surface of the lower spring seat and the Between the upper surface of the anti-rotation washer, the horizontal section of the broken line needle of the pointer is located in the cylinder, and the end of the horizontal section of the broken line needle of the pointer protrudes outward from one of the indicating grooves.

By setting different parameters of the controller 17, the first pressure sensor 13 can be replaced by a first pressure switch, and the second pressure sensor 14 can be replaced by a second pressure switch.

The invention is used to filter the compressed air containing a large amount of gaseous water output from the drying compressor, so as to ensure that the clean and dry compressed air is provided for the vehicle system. The displacement of the compressor matched with the double-tower drier of the present invention can be selected at about 1000L/min, and the air resistance is less than 50KPa.

Working principle of the present invention: first input port 20 and first output port 22 are respectively provided at both ends of the first drying cylinder 1, and second input port 21 and second output port 23 are respectively provided at both ends of the second drying cylinder 2, The user can freely choose to use the first input port 20, the first output port 22, the second input port 21 and the second output port 23 according to actual needs, both the input port and the output port can be used at the same time, and some of the above-mentioned The input port and the output port, and the unused input port and output port are sealed by plugs.

For the convenience of description, it is now assumed that only the second input port 21 and the second output port 23 are connected, and the first input port 20 and the first output port 22 are sealed by a plug.

When the second input port 21 takes in air and passes through the second air intake valve 6, usually the second air intake valve 6 is in an open state, and the air flow is output to the second drying cylinder 2, which is equipped with a disturbing metal pipe and Molecular sieve, the air flow is firstly disturbed to be in a uniform state, then dried by the molecular sieve, filtered by filter paper again, and then reaches the second check valve 8 through the intermediate air pipe. When the air pressure reaches a certain value, the second check valve 8 is closed. Open, the air flow reaches the second output port 23, so far the air flow output is completed.

Part of the above-mentioned dried air flow is diverted to the lower end of the pre-control valve 18 through the second output port 23. The outer end of the pre-control valve 18 is provided with a small filter component. When the pressure at the lower end of the pre-control valve 18 reaches a certain value, the valve is opened. At this time, the air flow reaches the lower end of the second electromagnetic valve 16. If the second electromagnetic valve 16 is energized and opened, the air flow reaches the closed cavity of the piston of the second intake valve 6 and the open cavity of the piston of the second exhaust valve 12. At this time, the first The second intake valve 6 is closed, the second exhaust valve 12 is opened, and the regeneration airflow is discharged.

Before the airflow dried by the second drying cylinder 2 reaches the second check valve 8, part of the airflow is diverted to the first drying cylinder 1, and the split airflow moves from bottom to top through the middle pipe of the first drying cylinder 1. After the top, the upper end of the molecular sieve in the first drying cylinder 1 moves to its lower end, the water adsorbed in the molecular sieve is blown out, reaches the first exhaust valve 11, and is discharged from the first exhaust port 24. The air flow can achieve different design requirements of regeneration air consumption by changing the path.

The controller 17 can control the power on and off of the first solenoid valve 15 and the second solenoid valve 16. When the second solenoid valve 16 is powered on, the second intake valve 6 of the second drying cylinder 2 is closed, and the second row The air port 25 is opened, and at this moment, the second drying cylinder 2 is not drying but is in the molecular sieve regeneration state. Conversely, the function is also the same when the first electromagnetic valve 15 is energized and opened. The working mode of the controller 17 can be optimally designed according to the actual needs of different users for circuit and function design.

When the temperature monitored by the temperature sensor 19 reaches the set start temperature value, the controller 17 instructs the second heater 10 to start, and when the set stop temperature value is reached, the controller 17 instructs the second heater 10 to stop working.

The first pressure sensor 13 and the second pressure sensor 14 are used to monitor whether the working mode of the first electromagnetic valve 15 and the second electromagnetic valve 16 is normal, that is, to judge the switching between the first drying cylinder 1 and the second drying cylinder 2 Whether the working mode is normal.

When the second heater 10 is in a normal working state, if the working mode of the first pressure sensor 13 or the second pressure sensor 14 is abnormal, the switching mode of the first solenoid valve 15 and the second solenoid valve 16 is abnormal, the current is abnormal, etc. At this time, the controller 17 can send relevant and different abnormal signals to the outside world in time, so that relevant technical measures can be taken in time to effectively eliminate them.

The controller 17 of the present invention has a storage and memory function. When there are situations that require analysis and judgment in actual work, the total working time of the double-tower dryer can be read through the controller 17. The first electromagnetic valve 15 and the second electromagnetic valve The total number of switching times between the valves 16, and the details of the working information in a relatively long period of work.

When there is air pressure in the drying cylinder, the ejector rod of the pressure indicator will pop out; when there is no air pressure in the drying cylinder, the ejector rod of the pressure indicator will automatically retract, which is usually used to identify the first The working conditions of the drying cylinder 1 and the second drying cylinder 2 can also be used to ensure the safety of the disassembly and replacement work when the first drying cylinder 1 and the second drying cylinder 2 are being disassembled and replaced.

Claims (10)

1. double-tower dryer, including the first drying（1）With the second drying（2）, it is characterised in that the first drying（1）Top Portion is provided with first pressure indicator（3）, the second drying（2）Top is provided with second pressure indicator（4）.

2. double-tower dryer as claimed in claim 1, it is characterised in that the first drying（1）Bottom side is provided with first Drain tap（11）, first exhaust valve（11）Top is provided with primary heater（9）.

3. double-tower dryer as claimed in claim 1, it is characterised in that the second drying（2）Bottom side is provided with second Drain tap（12）, second exhaust valve（12）Top is disposed with temperature sensor side by side（19）And secondary heater （10）.

4. double-tower dryer as claimed in claim 1, it is characterised in that the first drying（1）The left and right sides difference of bottom It is provided with first row gas port（24）With the first air intake valve（5）, the first air intake valve（5）Lower section is provided with first pressure sensor （13）.

5. double-tower dryer as claimed in claim 1, it is characterised in that the second drying（2）The left and right sides difference of bottom It is provided with the second air intake valve（6）And second exhaust port（25）, the second air intake valve（6）Lower section is provided with second pressure sensor （14）.

6. double-tower dryer as claimed in claim 2, it is characterised in that the first drying（1）Centre bottom position set There is first check-valve door（7）, first check-valve door（7）Left side is first exhaust valve（11）, first exhaust valve（11）Left side It is provided with the first delivery outlet（22）.

7. double-tower dryer as claimed in claim 3, it is characterised in that the second drying（2）Centre bottom position set There is second check-valve door（8）, second check-valve door（8）Right side is second exhaust valve（12）, second exhaust valve（12）Right side It is provided with the second delivery outlet（23）.

8. double-tower dryer as claimed in claim 1, it is characterised in that in the first drying（1）With the second drying（2）It Between medium position be provided with controller（17）, the first magnetic valve（15）And second solenoid valve（16）, controller（17）Respectively with First magnetic valve（15）And second solenoid valve（16）It is connected.

9. double-tower dryer as claimed in claim 8, it is characterised in that close to the first drying（1）Outer right wall and the One magnetic valve（15）The first input port is provided between left side（20）.

10. double-tower dryer as claimed in claim 8, it is characterised in that close to the second drying（2）Left side outer wall and Two magnetic valves（16）The second input port is provided between right side（21）.