Container type high-pressure gas drying purifier

Abstract

The invention discloses a container type high-pressure gas drying purifier which comprises a frame, at least two adsorption towers and an oil-water separator are installed on the frame, and the oil-water separator is sequentially connected with a pre-filter and an oil removal filter through pipelines; an integrated control board is arranged below the oil removal filter; and two electromagnetic pilot-operated type high-pressure gas two-position three-way valves are mounted on the integrated control board. According to the packaging type high-pressure gas drying purifier, through the design of the pressure reducing valve, the packaging type high-pressure gas drying purifier can be applied to the gas pressure ranging from 30 MPa to 70 MPa; therefore, the gas pressure required by the regenerated gas needs to be reduced in two stages, the pressure of the first-stage pressure reducing valve is reduced to about 15 MPa, and the pressure of the second-stage pressure reducing valve is reduced to about 1.5 MPa. Due to the fact that the output pressure of the first-stage pressure reducing valve is high, a direct acting type double-diameter piston type pressure reducing valve is adopted, and therefore a series of defects of a high-outlet-pressure pressure reducing valve in the current industry are perfectly overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry purifier, in particular to a high-pressure gas drying purifier of container type. BACKGROUND

[0002] The high-pressure gas drying purifier of container type is connected behind the compressor, and is used for dust removal, water removal and oil removal of the output gas of the compressor. One of the main control components of the high-pressure gas drying purifier of container type is an electromagnetic pilot-operated two-position three-way valve (invention patent 200710113084.X). The principle is that a commutating electromagnetic valve (invention patent 201610560373.3) controls the on-off of small flux high-pressure gas, the high-pressure gas pushes a stepped valve rod in the electromagnetic pilot-operated two-position three-way valve, and the stepped valve rod pushes a steel ball to seal the valve port of the main gas path, so as to control the on-off of the main gas path. Therefore, a certain pressure of gas is needed to reliably push the stepped valve rod during work.

[0003] In the industry, all the gas dryers currently use split components, four three-way valves and connecting pipes, and metal ball heads for two exhaust one-way valves and two regeneration gas one-way valves.

[0004] However, in the prior art, the small flux high-pressure gas used for control is directly delivered from the output gas of the compressor, and the pressure thereof is completely the same as the output gas pressure of the compressor. When the compressor is just started, the output gas pressure is very low, and the pressure cannot reliably push the stepped valve rod in the electromagnetic pilot-operated two-position three-way valve, resulting in the problem of leakage of the dry device due to the sealing of the steel ball being not tight. In addition, the gas pressure required by the regeneration gas needs to be reduced by two stages, and the first stage pressure reducing valve is reduced to about 15 MPa, and the second stage pressure reducing valve is reduced to about 1.5 MPa. However, due to the high output pressure of the first stage pressure reducing valve, the sealing property and use durability of the pressure reducing valve are a problem, and we cannot perfectly solve the series of disadvantages of the high outlet pressure reducing valve in the industry. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides a high-pressure gas drying purifier of container type, which solves the technical problems mentioned in the background.

[0006] To achieve the above purpose, the present application is realized by the following technical scheme: A high-pressure gas drying purifier of container type, comprising a frame, at least two adsorption towers and an oil-water separator are installed on the frame, a pre-filter and an oil removal filter are connected in sequence on the oil-water separator through pipelines; The oil removal filter is provided below with an integrated control panel, two electromagnetic pilot-operated high-pressure gas two-position three-way valves are installed on the integrated control panel, a gas release damping assembly and an air intake damping assembly are connected below the electromagnetic pilot-operated high-pressure gas two-position three-way valves, and the air intake damping assembly is connected with two adsorption towers; The upper end of the frame is provided with a one-way valve mounting plate, one end of the one-way valve mounting plate is connected with an adsorption tower, the other end is connected with a post-filter, the post-filter is connected with an ultra-precision filter through a pipeline, and the end of the ultra-precision filter is provided with a pressure maintaining valve, a first pressure reducing valve and a second pressure reducing valve through a pipeline and a three-way connection; The first pressure reducing valve comprises a valve body, a double-diameter piston is mounted in one end of the valve body, a sensitive compensation hole with different diameters at two ends is formed in the large-diameter piston of the double-diameter piston, the diameter of the large hole is much larger than that of the small hole, so that the pressures at the two ends of the sensitive compensation hole are equal in a static state, and the pressures at the two ends are not equal in a dynamic state; a discharge hole penetrating through the double-diameter piston is also formed transversely on the double-diameter piston, so that the pressure reducing valve has a self-discharge function; One end of the double-diameter piston is inserted into a center hole of a check ring, and the check ring forms a side sealing structure with one end of the valve body; a spring extrusion assembly is arranged on the outer circumferential surface of one end of the valve body, and is used for adjusting the spring force to extrude the double-diameter piston; An active valve seat is mounted in the other end of the valve body, an end screw is arranged on the active valve seat, a valve flap spring is mounted in the end screw, and a valve flap is inserted into a piston hole of the end screw.

[0007] As a further optimization of the technical solution, the first high-pressure gas two-position three-way valve and the second high-pressure gas two-position three-way valve are installed on the integrated control panel.

[0008] As a further optimization of the technical solution, the gas release damping assembly comprises a first gas release damping and a second gas release damping, and a first silencer and a second silencer are respectively connected to the positions of the outlets of the first gas release damping and the second gas release damping; The air intake damping assembly comprises a first air intake damping and a second air intake damping, one end of the first air intake damping and the second air intake damping is connected with the first high-pressure gas two-position three-way valve and the second high-pressure gas two-position three-way valve through the internal gas circuit of the integrated control panel, and the other end is connected with the first adsorption tower and the second adsorption tower through a pipeline.

[0009] As a further preferred embodiment of the present application, the one-way valve installation plate is provided with a one-way valve, which includes a first one-way valve, a second one-way valve, a first regenerated gas type one-way valve and a second regenerated gas type one-way valve installed in the one-way valve installation plate. The first one-way valve and the first regenerated gas type one-way valve are connected to the first adsorption tower through internal gas paths and external pipelines in the one-way valve installation plate. The second one-way valve and the second regenerated gas type one-way valve are connected to the second adsorption tower through internal gas paths and external pipelines in the one-way valve installation plate.

[0010] As a further preferred embodiment of the present application, the oil-water separator, the pre-filter, the oil removal filter, the post-filter and the ultra-precision filter are provided with blowdown pipelines at the blowdown ports. The blowdown pipeline of the oil-water separator is provided with a first high-pressure needle valve and a first blowdown electromagnetic valve. The blowdown pipelines of the pre-filter and the oil removal filter are respectively provided with a first blowdown one-way valve and a second blowdown one-way valve. A pipeline filter is arranged after the blowdown one-way valve. A second high-pressure needle valve is arranged after the pipeline filter. A second blowdown electromagnetic valve is further arranged on the blowdown pipeline. The blowdown pipelines of the post-filter and the ultra-precision filter are respectively provided with a third blowdown one-way valve and a fourth blowdown one-way valve. A third blowdown electromagnetic valve and a third high-pressure needle valve are further arranged on the blowdown pipeline.

[0011] As a further preferred embodiment of the present application, a low-pressure control island is arranged on the pipeline between the pressure maintaining valve and the second regenerated gas type one-way valve. The low-pressure control island includes a shell. A group of interfaces are arranged on the shell. An internal gas path is arranged in the shell and communicates with the group of interfaces. A first throttle valve and a second throttle valve are arranged on the shell and correspondingly matched with the internal gas path in the shell. A first pressure gauge, a second pressure gauge, an online dew point sensor, a detection port, a safety valve and a regenerated gas pressure gauge are further arranged on the shell. A heater, a first temperature sensor and a second temperature sensor are arranged between the low-pressure control island and the second regenerated gas type one-way valve.

[0012] As a further preferred embodiment of the present application, four semicircular straight grooves are formed in the front end of the end screw plug, which serve as gas inlet channels for inlet pressure.

[0013] As a further preferred embodiment of the present application, the bottom surface of the movable valve seat is sealed with an O-ring and a pressure reducing valve. A 40-60° horn is arranged in the middle of the movable valve seat as a throttle valve port.

[0014] As a further preferred embodiment of the present application, the spring pressing assembly comprises a spring sleeve which is threadedly connected to the outer circumferential surface of the valve body for clamping the check ring, the inside of the spring sleeve is sequentially provided with a spring lower support seat, a rectangular spring and a spring upper support seat, the end of the spring sleeve away from the valve body is threadedly connected with a spring sleeve upper cover, the spring sleeve upper cover is provided with a steel ball, and the spring sleeve upper cover is threadedly connected with an adjusting bolt; the adjusting bolt abuts against the steel ball, and the steel ball abuts against the spring upper support seat.

[0015] As a further preferred embodiment of the present application, the adjusting bolt is threadedly engaged with the spring sleeve upper cover, the adjusting bolt is provided with a locking nut, and the adjusting bolt is provided with an adjusting handle.

[0016] Compared with the prior art, the present application has the following advantages: The present application can be applied to the gas pressure in the range of 30 MPa-70 MPa by the design of the pressure reducing valve; since the gas pressure required for the regeneration gas needs two-stage pressure reduction, the first-stage pressure reducing valve reduces the pressure to about 15 MPa, and the second-stage pressure reducing valve reduces the pressure to about 1.5 MPa. The direct-acting double-diameter piston type pressure reducing valve is used for the first-stage pressure reducing valve due to the high output pressure, thereby perfectly solving a series of drawbacks of the high outlet pressure reducing valve in the industry. By adding a control gas path one-way valve, the higher gas pressure at the last compressor shutdown is retained in the pipeline between the control gas path one-way valve and the first high-pressure gas two-position three-way valve and the second high-pressure gas two-position three-way valve, which is used for the next time to start the drying device. Therefore, even if the output gas pressure is low when the compressor is started next time, the drying device can be normally started by relying on the retained higher gas pressure, thereby overcoming the defect that the drying device cannot be normally operated when the output gas pressure of the compressor is low.

[0017] The present application adds a low-pressure control island, which comprises a shell, a group of interfaces are arranged on the shell, an internal gas path is arranged in the shell and communicated with the group of interfaces, at least one throttle valve is installed on the shell and corresponds to the gas path in the shell; a pressure gauge for detecting gas pressure, an online dew point sensor for detecting real-time gas dew point temperature, a pressure gauge safety valve for protecting the pressure gauge and other components can be integrally installed on the shell; one end of the low-pressure control island is connected with the second pressure reducing valve, and the other end is connected with the heater. The low-pressure control island can throttle and reduce the pressure of the gas delivered by the pressure reducing valve to form the regeneration gas used by the dryer. The low-pressure control island integrates the functions of gas pressure reduction, throttling, pressure detection and dew point detection into one, greatly reduces the system complexity and improves the product reliability.

[0018] By setting the integrated control board, one-way valve installation plate, low pressure control island, greatly reduces the split components, high pressure pipeline and pipeline joint, greatly improves the reliability and durability of the whole machine system, at the same time, makes the whole machine system more simple and compact, adjustment and maintenance is particularly convenient, adsorbent regeneration is sufficient, product gas quality is excellent, man-machine interface is clear and easy to understand. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the front view structure schematic diagram of the present application; Figure 2 It is the rear view structure schematic diagram of the present application; Figure 3 It is the drying purifier process flow chart of the present application; Figure 4 It is the section structure schematic diagram of the first pressure reducing valve of the present application; Figure 5 It is the structure schematic diagram of the movable valve seat of the present application; Figure 6 It is the structure schematic diagram of the end screw plug of the present application.

[0020] In the figure: 1, oil-water separator; 2, pre-filter; 3, oil removal filter; 4a, first high-pressure gas two-position three-way valve; 4b, second high-pressure gas two-position three-way valve; 5a, first adsorption tower; 5b, second adsorption tower; 6a, first adsorption tower pressure gauge; 6b, second adsorption tower pressure gauge; 7a, first check valve; 7b, second check valve; 8a, first regeneration gas type check valve; 8b, second regeneration gas type check valve; 9, post-filter; 10, ultra-precision filter; 11, pressure maintaining valve; 12a, first pressure reducing valve; 12b, second pressure reducing valve; 13a, first pressure gauge; 13b, second pressure gauge; 14, first throttle valve; 15, second throttle valve; 16, online dew point sensor; 17, detection port; 18, safety valve; 19, regeneration gas pressure gauge; 20, heater; 21a, first temperature sensor; 21b, second temperature sensor; 22a, first silencer; 22b, second silencer; 23, pipeline filter; 24a, first blowdown solenoid valve; 24b, second blowdown solenoid valve; 24c, third blowdown solenoid valve; 25a, first high-pressure needle valve; 25b, second high-pressure needle valve; 25c, third high-pressure needle valve; 26a, first blowdown check valve; 26b, second blowdown check valve; 26c, third blowdown check valve; 26d, fourth blowdown check valve; 27a, first inlet damper; 27b, second inlet damper; 28a, first outlet damper; 28b, second outlet damper; 29, control gas path check valve; 30, check valve mounting plate; In, inlet; Out, finished product outlet; V, regeneration waste gas outlet; SO, blowdown port; 31, spring sleeve upper cover; 32, spring sleeve; 33, steel ball; 34, spring upper support seat; 35, rectangular spring; 36, spring lower support seat; 37, double-diameter piston; 38, valve flap; 39, valve body; 40, end screw; 41, valve flap spring; 42, movable valve seat; 43, sensitive compensation hole; 44, discharge hole; 45, retaining ring; 46, locking nut; 47, adjusting bolt; 48, adjusting handle. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the specification. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0022] The container type high pressure gas drying purifier mainly applies gas pressure in the range of 30MPa-70MPa, so the gas pressure required for the regeneration gas needs two-stage pressure reduction, the first stage pressure reduction valve reduces to about 15MPa, and the second stage pressure reduction valve reduces to about 1.5MPa. The first stage pressure reduction valve has high output pressure, so we use a special first pressure reduction valve 12a, thereby perfectly solving a series of drawbacks of the high outlet pressure reduction valve in the industry.

[0023] Embodiment 1 Please refer to Figures 1-3 As shown in the figure, a container type high pressure gas drying purifier includes two first adsorption towers 5a and second adsorption towers 5a, a frame for fixing the first adsorption towers 5a and second adsorption towers 5b, and an integrated control panel installed on the frame, an oil-water separator 1 is arranged on the right side of the second adsorption tower 5b, the oil-water separator 1 is connected with a pre-filter 2 through a pipeline, the pre-filter 2 is connected with an oil removal filter 3 through a pipeline, the oil removal filter 3 is connected with the integrated control panel, the integrated control panel is installed with a first high pressure gas two-position three-way valve 4a and a second high pressure gas two-position three-way valve 4b, a control gas path check valve 29 is arranged between the oil removal filter 3 and the integrated control panel through a pipeline, the bottom of the integrated control panel is provided with an air inlet damping assembly and an air outlet damping assembly, and the other end of the air inlet damping assembly is connected with the first adsorption tower 5a and the second adsorption tower 5b through a pipeline, the upper end of the frame is provided with a check valve mounting plate 30, the integrated check valve mounting plate 30 uses the patent with the application number 2011101607499 as prior art, and its structure will not be described here; a check valve is arranged in the check valve mounting plate 30, and one end of the check valve mounting plate is connected with the first adsorption tower 5a and the second adsorption tower 5b through a pipeline, and the other end is connected with a post-filter 9 through a pipeline, the other end of the post-filter 9 is connected with an ultra-precision filter 10 through a pipeline, and the other end of the ultra-precision filter 10 is connected with a pressure maintaining valve 11, a first pressure reduction valve 12a and a second pressure reduction valve 12b through a pipeline and a three-way connection.

[0024] In the embodiment of the present application, in the direction of the air flow, they are in turn an oil-water separator, a pre-filter, an oil removal filter, solid impurities, free water and oil mist particles entrained in compressed air are separated here, the outlet of the dryer is a post-filter, an ultra-precision filter for filtering the pulverized dust particles of the adsorbent; by installing two first high-pressure gas two-position three-way valves 4a and second high-pressure gas two-position three-way valves 4b on the integrated control panel, the opening and closing of the two two-position three-way valves are controlled by PLC, the adsorption and regeneration of the first adsorption tower 5a and the second adsorption tower 5b are switched, replacing the four-valve or five-valve structure control mode of the existing dryer, the first high-pressure gas two-position three-way valve 4a and the second high-pressure gas two-position three-way valve 4b are used as control devices in the product, this innovative control element and control mode simplify the system structure and improve the system operation reliability; the control gas path one-way valve 29 is a two-position three-way valve control gas path one-way valve, mainly plays the role of maintaining the control gas path pressure, that is, stabilizing the control pressure when the adsorption tower switches; after adding a "control gas path one-way valve 29", a higher gas pressure at the last compressor shutdown is retained in the pipeline between the control gas path one-way valve 29 and the first high-pressure gas two-position three-way valve 4a and the second high-pressure gas two-position three-way valve 4b, which is used for the next time the dryer is started, so that even if the output gas pressure is low when the compressor is started next time, the dryer can also be started normally relying on the retained higher gas pressure, thus overcoming the defect that the dryer cannot operate normally when the compressor output gas pressure is low.

[0025] In the embodiment of the present application, the air release damping assembly includes a first air release damping 28a and a second air release damping 28b, and the outlets of the first air release damping 28a and the second air release damping 28b are respectively connected with a first silencer 22a and a second silencer 22b; the air inlet damping assembly includes a first air inlet damping 27a and a second air inlet damping 27b, one end of each of the first air inlet damping 27a and the second air inlet damping 27b is connected with the integrated control panel through a pipeline, and the other end is respectively connected with the first adsorption tower 5a and the second adsorption tower 5b through a pipeline; when the regeneration of the second adsorption tower 5b is completed, the pressure in the tower is low, the second high-pressure gas two-position three-way valve 4b is powered on, and high-pressure gas flows to the second adsorption tower 5b instantaneously, in order to alleviate the instantaneous impact of the high-pressure gas on the molecular sieve, a second air inlet damping 27b is arranged in the air inlet channel of the second adsorption tower 5b, and the first air inlet damping 27a is arranged in the first adsorption tower 5a; the initial high-pressure gas compression spring makes the damper form a small-diameter air inlet, and after the pressure in the tower rises, the spring resets and the damper resets to form a large-diameter air inlet; in order to alleviate the instantaneous impact of the instantaneous high-pressure gas on the molecular sieve, an air release damping is arranged in the exhaust channel of the silencer, the initial high-pressure gas compression spring makes the damper form a small-diameter output, and when the pressure in the tower drops to a low pressure state, the spring resets and the damper resets to form a large-diameter output, thereby accelerating the air release speed.

[0026] In the embodiment of the present application, the one-way valve comprises a first one-way valve 7a, a second one-way valve 7b, a first regenerative gas type one-way valve 8a and a second regenerative gas type one-way valve 8b installed in the one-way valve mounting plate 30, the first one-way valve 7a and the first regenerative gas type one-way valve 8a are both connected with the first adsorption tower 5a through the internal gas path of the one-way valve mounting plate and the pipeline, and a first adsorption tower pressure gauge 6a is arranged on the pipeline, the second one-way valve 7b and the second regenerative gas type one-way valve 8b are both connected with the second adsorption tower 5b through the internal gas path of the one-way valve mounting plate and the pipeline, and a second adsorption tower pressure gauge 6b is arranged on the pipeline, the first one-way valve 7a, the second one-way valve 7b, the first regenerative gas type one-way valve 8a and the second regenerative gas type one-way valve 8b are screwed into the one-way valve mounting plate 30, which can be easily disassembled during installation and maintenance, and after using this way, the whole machine system reduces dozens of ball joints and pipelines, greatly simplifying the system structure.

[0027] In the embodiment of the present application, the oil-water separator 1, the pre-filter 2, the oil removal filter 3, the post-filter 9 and the ultra-precision filter 10 are all provided with blowdown pipelines at the blowdown ports, the blowdown pipeline of the oil-water separator 1 is provided with a first blowdown electromagnetic valve 24a and a first high-pressure needle valve 25a, the blowdown pipelines of the pre-filter 2 and the oil removal filter 3 are respectively provided with a first blowdown one-way valve 26a and a second blowdown one-way valve 26b, a pipeline filter 23 is arranged after the blowdown one-way valve, a second blowdown electromagnetic valve 24b and a second high-pressure needle valve 25b are further arranged after the pipeline filter 23, the blowdown pipelines of the post-filter 9 and the ultra-precision filter 10 are respectively provided with a third blowdown one-way valve 26c and a fourth blowdown one-way valve 26d, and the blowdown pipelines are further provided with a third blowdown electromagnetic valve 24c and a third high-pressure needle valve 25c.

[0028] In the embodiment of the present application, the super-precision filter 10 outputs to the pressure maintaining valve 11 respectively, and a low-pressure control island is arranged on the pipeline between the second regeneration gas type one-way valve 8b, the low-pressure control island comprises a shell, a group of interfaces are arranged on the shell, an internal gas path in communication with the group of interfaces is arranged in the shell, the first throttling valve 14 and the second throttling valve 15 are installed on the shell and correspondingly matched with the gas path in the shell, the first pressure gauge 13a, the first pressure gauge 13b, the online dew point sensor 16, the detection port 17, the safety valve 18 and the regeneration gas pressure gauge 19 are further arranged on the shell, the heater 20, the first temperature sensor 21a and the second temperature sensor 21b are arranged between the low-pressure control island and the second regeneration gas type one-way valve 8b, the safety valve 18 is designed in the product, and the function of the safety valve 18 is to close when the regeneration gas pipeline pressure has a large pulsation caused by the two towers pressure equalization switching, so as to ensure that the low-pressure regeneration gas pressure gauge is not damaged due to the pulsation pressure uprush, and when the switching is completed and the pressure in the regeneration gas pipeline falls to the normal state, the safety valve 18 is automatically opened, so that the low-pressure regeneration gas pressure gauge correctly displays the pressure, thereby avoiding the disadvantages of the traditional product that part of the product gas is discharged in the two tower switching moment, causing the loss of product gas; the low-pressure control island can directly throttle and reduce the pressure of the gas delivered by the pressure reducing valve into the regeneration gas used by the dryer; the low-pressure control island integrates the functions of gas pressure reduction, throttling, pressure detection and dew point detection which originally need to be used in cooperation with multiple components, so that the system complexity is greatly reduced and the product reliability is improved.

[0029] The working principle of the high-pressure gas drying and purifying device in the container type is as follows: the first adsorption tower 5a and the second adsorption tower 5b work in the adsorption-pressure relief-regeneration-pressure charging-adsorption cycle, and the working period is 40 minutes which can be adjusted. Initial pressure charging: the first adsorption tower 5a and the second adsorption tower 5b are simultaneously charged. After the power is turned on and the start button is pressed, the first high-pressure gas two-position three-way valve 4a and the second high-pressure gas two-position three-way valve 4b are simultaneously powered, and the first adsorption tower 5a and the second adsorption tower 5b are simultaneously charged for 20 seconds which can be adjusted.

[0030] Adsorption and regeneration: the first adsorption tower 5a adsorbs and the second adsorption tower 5b regenerates. First adsorption tower 5a adsorption: The first high-pressure gas two-position three-way valve 4a is powered, the second high-pressure gas two-position three-way valve 4b is de-energized, the compressed air to be dried passes through the oil-water separator 1, the pre-filter 2, and the oil removal filter 3, and the liquid water, solid impurities, and oil mist particles in the gas are separated, the filtered gas passes through the first high-pressure gas two-position three-way valve 4a and the integrated control panel from bottom to top through the first adsorption tower 5a, the water vapor in the gas is adsorbed by the molecular sieve in the tower, the dried gas flows to the post-filter 9 and the ultra-precision filter 10 through the first one-way valve 7a, the fine dust and other impurities generated by the wear of the molecular sieve are filtered out in the post-filter 9 and the ultra-precision filter 10, and the dried and clean gas enters the subsequent system through the pressure maintaining valve 11.

[0031] Regeneration of the second adsorption tower 5b: When the first adsorption tower 5a enters the adsorption state, the second adsorption tower 5b simultaneously performs regeneration of the adsorbent molecular sieve, which can be divided into a heating stage and a cold blowing stage; in the heating stage, the heater 20 is powered on to start working, and in this stage, if the outlet temperature of the heater 20 is higher than the set value (adjustable), the heater stops heating; when the outlet temperature of the heater 20 again drops to the set value (adjustable), the heater 20 starts heating again; because the adsorption capacity of the adsorbent decreases when the temperature is high, in the cold blowing stage, the heater 20 stops working, and the adsorbent is blown cold to room temperature by using the non-heated product regeneration gas to obtain better regeneration effect. The regeneration gas comes from the dried gas, the dried gas passes through the pressure reducing valve 12, the first throttling valve 14, the heater 20, and the second regeneration gas type one-way valve 8b from top to bottom through the second adsorption tower 5b to desorb the molecular sieve adsorbent, and then the wet air is discharged into the atmosphere through the second high-pressure gas two-position three-way valve 4b and the second silencer 22b, and the adsorption and regeneration time of this section is adjustable.

[0032] Pressure equalization: the second adsorption tower 5b is pressurized, and the first adsorption tower 5a is depressurized: When the regeneration of the second adsorption tower 5b is completed, the second high-pressure gas two-position three-way valve 4b is powered on, and the gas from the gas source passes through the second high-pressure gas two-position three-way valve 4b and the integrated control panel to charge the second adsorption tower 5b from bottom to top. At this time, the first high-pressure gas two-position three-way valve 4a is still in the powered state, and because the pressure in the second adsorption tower 5b is equal to the atmospheric pressure when the regeneration of the second adsorption tower 5b is completed, the high-pressure gas in the first adsorption tower 5a is also discharged to the second adsorption tower 5b, the pressure of the first adsorption tower 5a decreases, and the pressure of the second adsorption tower 5b increases quickly. When the pressures of the second adsorption tower 5b and the first adsorption tower 5a are equal, the pressure equalization is completed, and then the first high-pressure gas two-position three-way valve 4a is de-energized, the high-pressure gas in the first adsorption tower 5a is discharged into the atmosphere through the first high-pressure gas two-position three-way valve 4a and the first silencer 22a, and the first adsorption tower 5a is depressurized until it is equal to the atmospheric pressure.

[0033] At the end of the process, the two towers are switched, and a new cycle of adsorption is started, in which the second adsorption tower 5b is adsorbing and the first adsorption tower 5a is regenerating. The process is the same as before, except that the first adsorption tower 5a and the second adsorption tower 5b processes are interchanged.

[0034] Example 2 Based on Example 1, according to Figure 4 As shown in the figure, the first pressure reducing valve 12a includes a valve body 39, one end of the valve body 39 is equipped with a double-diameter piston 37, the double-diameter piston 37 is provided with two sensitive compensation holes 43 with different diameters at both ends, and the double-diameter piston 37 is also provided with a discharge hole 44 transversely passing through the double-diameter piston 37, which enables the pressure reducing valve to have a self-discharge function; the small-diameter piston of the double-diameter piston 37 is in a piston sealing structure with the center hole of the check ring 45. The large-diameter piston of the double-diameter piston 37 forms a piston sealing structure with the valve body 39; One end of the double-diameter piston 37 is inserted into the center hole of the check ring 45, and the check ring 45 forms a side sealing structure with one end of the valve body 39; a spring extrusion assembly is arranged on the outer peripheral surface of one end of the valve body 39, which is used to adjust the spring force to extrude the double-diameter piston 37; The spring extrusion assembly includes a spring sleeve 32, which is threadedly connected to the outer peripheral surface of the valve body 39 for clamping the check ring 45, and the inside of the spring sleeve 32 is sequentially provided with a spring lower support seat 36, a rectangular spring 35, and a spring upper support seat 34. One end of the spring sleeve 32 away from the valve body 39 is threadedly connected with a spring sleeve upper cover 31, the spring sleeve upper cover 31 is equipped with a steel ball 33, and the spring sleeve upper cover 31 is threadedly connected with an adjusting bolt 47; The adjusting bolt 47 is threadedly engaged with the spring sleeve upper cover 31, the adjusting bolt 47 is equipped with a locking nut 46, and the adjusting bolt 47 is provided with an adjusting handle 48.

[0035] The other end of the valve body 39 is equipped with a movable valve seat 42, the movable valve seat 42 is provided with an end screw plug 40, the end screw plug 40 adopts an O-ring side sealing structure with the valve body 39, the end screw plug 40 is equipped with a valve flap spring 41, and the end screw plug 40 is inserted with a valve flap 38 in the piston hole; during the engagement of the external threads of the end screw plug 40 and the internal threads of the valve body 39, the spherical sealing surface of the valve flap 38 is tightly attached to the throttle valve port of the movable valve seat 42, at the end of the thread engagement, the movable valve seat 42 is compressed, the bottom end face sealing is effective, and the top end of the valve flap 38 forms a spherical seal with the piston discharge hole 44.

[0036] Pressure regulating process: Turning the adjusting handle 48, the rectangular spring 35 is compressed by the adjusting bolt 47, the steel ball 33 and the spring upper support seat 34, the spring force generated by the spring upper support seat 34 and the d1 diameter upper end of the double-diameter piston 37 makes the double-diameter piston 37 move to the right, and the double-diameter piston 37 drives the valve disc 38 to move to the right. The throttling orifice in the movable valve seat 42 is opened, the inlet pressure P1 generates the outlet pressure P2 through the throttling orifice and the throttling gap formed by the valve disc 38 and the valve body 39, and when the required outlet pressure P2 is adjusted, the adjusting is completed by tightening the adjusting bolt 47 with the nut 16.

[0037] The sealing property and durability of the pressure reducing valve are greatly improved by the spherical sealing of the alloy valve disc and the movable throttling valve seat and the metal spherical sealing of the valve disc top and the piston discharge hole.

[0038] When the pressure reducing valve is adjusted to the required outlet pressure, two states are described and formulas are listed.

[0039] I. When the inlet pressure P1 and the outlet pressure P2 are constant values, and the outlet flow is also constant, we call it static. At this time, the pressures of the high-pressure gas chambers at both ends of the sensitive compensation hole are equal, P3=P2, and the spring force F2 formula at this time is: From formula 3, it can be seen that the spring force of the pressure reducing valve is independent of the d2 diameter of the piston, so when the outlet pressure P2 is constant, the small diameter d1 of the small-diameter piston of the pressure reducing valve can be selected as a smaller value to obtain a smaller spring force.

[0040] Through the above examples, the advantages can be further proved. In the example of the direct-acting piston type pressure reducing valve, the outlet pressure P2=20MPa, the piston diameter d5=22mm, and the spring force F2= 308kg is obtained. In the pressure reducing valve of the present application, d1=14mm is selected, and formula 3 is substituted to obtain F2=308kg. It can be seen that the selected spring force is reduced by about 60%.

[0041] II. When the inlet pressure P1 is constant, the required outlet pressure P2 is obtained after the pressure reducing valve is adjusted, and if the outlet flow fluctuates at this time, we call it dynamic. Assuming the extreme case, the outlet flow is shut off by the shut-off valve, i.e. the outlet flow is zero, and the outlet pressure P2 is definitely increased, and the increment value of P2 is ΔP2, at this time, since d4 at the right end of the sensitive compensation hole is a small value, P2>P3 in a short time, i.e. .

[0042] If the outlet flow is 50% of the rated value, when the outlet flow increases to the rated flow, the outlet pressure P2 will certainly decrease, which is a negative increment -ΔP2, at this time, due to the effect of the sensitive compensation hole d4 at the right end, P3>P2 in a short time; .

[0043] As described above, when the inlet pressure P1 and the outlet flow fluctuate positively and negatively, the outlet pressure P2 will generate positive and negative increment values ±ΔP2; Since d2>d1, A2>>A1, in order to clarify the actual meaning of formula 4, the value of A1 can be ignored in engineering, and formula 4 is simplified as: In static state: F2'=F2; in dynamic state, there is an additional feedback force ±A2ΔP2: From formula 5, it can be seen that in dynamic state, the spring force F2 is a constant value, when the increment value ΔP2 is positive, a feedback force A2ΔP2 is generated on the area of the large diameter of the piston, which instantaneously drives the piston to move left, opens the discharge hole, at this time, the increment ΔP2 of the high-pressure chamber at the right end of the piston is discharged to the atmosphere through the discharge hole in the center of the piston, at the same time, the piston drives the valve disc to move left, reduces the opening of the throttle port, can reduce the value of P2, also reduces the increment value of ΔP2, finally makes the two sides of formula 5 balance, eliminates the fluctuation of the outlet pressure P2.

[0044] When the increment value ΔP2 is negative, a feedback -A2ΔP2 is also generated on the area of the large diameter of the piston, since the spring force F2 is a constant value, the feedback force instantaneously drives the piston to move right, at the same time, drives the valve disc to move right, increases the opening of the throttle port, increases the intake, can increase the value of P2, to overcome the influence of -ΔP2, finally makes the ±ΔP2 on the piston tend to zero, makes the two sides of formula 5 balance, eliminates the fluctuation of the outlet pressure P2.

[0045] As described above, it can be seen that the greater the feedback force, the higher the regulation accuracy of the outlet pressure P2 of the pressure reducing valve. Since the feedback force is ±A2ΔP2, A2, i.e. d2, can be selected as a larger value. In the prior art, the diameter d5 of the piston is related to the outlet pressure P2 and the spring force F2 that can be selected, which has been described above. In the present application, the spring force F of the pressure reducing valve is only related to the small diameter d1 of the piston, and is not related to the large diameter d2. Therefore, d2 can be selected as a larger value according to the volume of the valve body, a larger A2 is obtained, and a larger feedback force is obtained, so that the regulation accuracy of the pressure reducing valve is greatly improved.

[0046] The opening and closing of the throttle valve port and the discharge valve port of the existing piston pressure reducing valve both use a metal round nozzle structure and F3 material (polytrifluorochloroethylene) plane contact sealing, as shown in Figure 1 In actual use, the F3 material has lower strength than the metal round nozzle, and causes F3 damage during opening and closing, leading to sealing leakage and thus failure of the pressure reducing valve.

[0047] In the pressure reducing valve of the present application, the throttle valve port and the discharge valve port are both metal spherical sealing. If the throttle valve seat is synchronously machined with the pressure reducing valve body during machining of the pressure reducing valve, slight deviation of the concentricity of the throttle valve seat can easily cause sealing failure of the alloy valve disc and the throttle valve seat To solve this problem, the present application proposes to set an active valve seat 42, as shown in Figure 5 The bottom surface of the active valve seat 42 uses an O-ring to seal with the plane of the pressure reducing valve, and the middle of the active valve seat 42 has a 40° horn port as the throttle valve port. Before assembling the end screw plug 40, the alloy valve disc 38 is first put in, and the lower part of the alloy valve disc 38 has two O-rings which are put into the piston hole in the end screw plug 40 to form piston sealing. As shown in Figure 6 The front end of the end screw plug 40 is provided with four semicircular straight grooves as the gas inlet channel of the inlet pressure P1. The front end of the end screw plug 40 is pressed on the upper surface of the active valve seat 42, the spherical sealing surface of the alloy valve disc 38 is tightly combined with the throttle valve port in the meshing of the threads of the end screw plug 40 and the valve body 39, and the concentricity is highly consistent. When the meshing of the threads is finished, the active valve seat 42 is pressed tightly, the bottom end surface sealing is effective, and the spherical sealing of the throttle valve seat port and the valve disc is generated.

[0048] The spherical sealing of the alloy valve disc and the throttle valve seat and the metal spherical sealing of the top end of the metal valve disc and the piston discharge hole greatly improve the sealing and durability of the pressure reducing valve of the present application.

[0049] In the present embodiment: P1, inlet pressure; P2, outlet pressure; P3, left high pressure chamber pressure; d1, small diameter of piston; d2, large diameter of piston; d3, large hole diameter of sensitive compensation hole; d4, small hole diameter of sensitive compensation hole.

[0050] Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-pressure gas drying purifier in a container, comprising a frame, at least two adsorption towers and an oil-water separator (1) mounted on the frame, a pre-filter (2) and an oil removal filter (3) connected in sequence on the oil-water separator (1) through pipes. Characterized in that; The oil removal filter (3) is provided below with an integrated control panel, two electromagnetic pilot-operated high-pressure gas two-position three-way valves are installed on the integrated control panel, a gas release damping assembly and an air intake damping assembly are connected below the electromagnetic pilot-operated high-pressure gas two-position three-way valves, and the air intake damping assembly is connected with two adsorption towers; The upper end of the frame is provided with a one-way valve mounting plate (30), one end of the one-way valve mounting plate (30) is connected with an adsorption tower, the other end is connected with a post-filter (9), the post-filter (9) is connected with an ultra-precision filter (10) through a pipeline, and the end of the ultra-precision filter (10) is provided with a pressure maintaining valve (11), a first pressure reducing valve (12a) and a second pressure reducing valve (12b) through a pipeline and a three-way connection; The first pressure reducing valve (12a) comprises a valve body (39), one end of the valve body (39) is provided with a double-diameter piston (37), a sensitive compensation hole (43) with different diameters at both ends is formed in the large-diameter piston of the double-diameter piston (37), the diameter of the large hole is much larger than that of the small hole, the pressures at both ends of the sensitive compensation hole (43) are equal in a static state, and the pressures at both ends are not equal in a dynamic state; a discharge hole (44) penetrating through the double-diameter piston (37) is also formed in the double-diameter piston (37), and the discharge hole (44) enables the pressure reducing valve to have a self-discharge function; One end of the double-diameter piston (37) is inserted into a center hole of a check ring (45), and the check ring (45) and one end of the valve body (39) form a side sealing structure; a spring extrusion assembly is arranged on the outer circumferential surface of one end of the valve body (39), and is used for adjusting the spring force to extrude the double-diameter piston (37); The other end of the valve body (39) is provided with a movable valve seat (42), the movable valve seat (42) is provided with an end screw (40), the end screw (40) is provided with a valve clack spring (41), and a valve clack (38) is inserted into the piston hole of the end screw (40).

2. A high pressure gas drying purifier of the kind referred to in claim 1, characterised in that: The first high-pressure gas two-position three-way valve (4a) and the second high-pressure gas two-position three-way valve (4b) are installed on the integrated control panel.

3. A high pressure gas drying and purifier of the self-contained type according to claim 1, characterized in that: The gas release damping assembly comprises a first gas release damping (28a) and a second gas release damping (28b), and the outlets of the first gas release damping (28a) and the second gas release damping (28b) are respectively connected with a first silencer (22a) and a second silencer (22b); The air intake damping assembly comprises a first air intake damping (27a) and a second air intake damping (27b), one end of the first air intake damping (27a) and the second air intake damping (27b) is connected with the first high-pressure gas two-position three-way valve (4a) and the second high-pressure gas two-position three-way valve (4b) through the internal gas circuit of the integrated control panel, and the other end is connected with the first adsorption tower (5a) and the second adsorption tower (5b) through a pipeline.

4. A high pressure gas drying and purifier of the self-contained type according to claim 1, characterized in that: The one-way valve installation plate (30) is internally provided with one-way valves, the one-way valves include a first one-way valve (7a), a second one-way valve (7b), a first regenerated gas type one-way valve (8a) and a second regenerated gas type one-way valve (8b) installed in the one-way valve installation plate (30), the first one-way valve (7a) and the first regenerated gas type one-way valve (8a) are connected with the first adsorption tower (5a) through internal gas paths in the one-way valve installation plate (30) and external pipelines, and the second one-way valve (7b) and the second regenerated gas type one-way valve (8b) are connected with the second adsorption tower (5b) through internal gas paths in the one-way valve installation plate (30) and external pipelines.

5. A high pressure gas drying and purifier of the self-contained type as claimed in claim 1, characterized in that: The blowdown pipes are arranged at positions of blowdown outlets of the oil-water separator (1), the pre-filter (2), the oil removal filter (3), the post-filter (9) and the super-precision filter (10), the first high-pressure needle valve (25a) and the first blowdown electromagnetic valve (24a) are arranged on the blowdown pipe of the oil-water separator (1), the first blowdown one-way valve (26a) and the second blowdown one-way valve (26b) are respectively arranged on the blowdown pipes of the pre-filter (2) and the oil removal filter (3), the pipeline filter (23) is arranged behind the blowdown one-way valve, the second high-pressure needle valve (25b) is arranged behind the pipeline filter (23), the second blowdown electromagnetic valve (24b) is further arranged on the blowdown pipe, the third blowdown one-way valve (26c) and the fourth blowdown one-way valve (26d) are respectively arranged on the blowdown pipes of the post-filter (9) and the super-precision filter (10), and the third blowdown electromagnetic valve (24c) and the third high-pressure needle valve (25c) are further arranged on the blowdown pipe.

6. A high pressure gas drying and purifier of the self-contained type as claimed in claim 1, characterized in that: A low-pressure control island is arranged on a pipeline between the pressure maintaining valve (11) and the second regenerated gas type one-way valve (8b), the low-pressure control island includes a shell, a group of interfaces are arranged on the shell, internal gas paths in communication with the group of interfaces are arranged in the shell, the first throttle valve (14) and the second throttle valve (15) are arranged on the shell and correspondingly matched with the gas paths in the shell, the first pressure gauge (13a), the second pressure gauge (13b), the online dew point sensor (16), the detection port (17), the safety valve (18) and the regenerated gas pressure gauge (19) are further arranged on the shell, and the heater (20), the first temperature sensor (21a) and the second temperature sensor (21b) are arranged between the low-pressure control island and the second regenerated gas type one-way valve (8b).

7. A high pressure gas drying and purifier of the self-contained type as claimed in claim 1, characterized in that Four semicircular straight grooves are formed in the front end of the end screw plug (40), and the four semicircular straight grooves serve as gas inlet channels of inlet pressure.

8. A high pressure gas drying purifier of the kind referred to in claim 1, characterised in that, The bottom surface of the movable valve seat (42) is sealed with an O-shaped ring and the pressure reducing valve, and the middle of the movable valve seat (42) has a 40-60° horn opening as a throttle valve opening.

9. A high pressure gas drying purifier in a package according to claim 1, characterized in that, The spring pressing assembly comprises a spring sleeve (32) which is threadedly connected to the outer circumferential surface of a valve body (39) for clamping a check ring (45), the inside of the spring sleeve (32) is sequentially provided with a spring lower support seat (36), a rectangular spring (35) and a spring upper support seat (34), the end of the spring sleeve (32) away from the valve body (39) is threadedly connected with a spring sleeve upper cover (31), the spring sleeve upper cover (31) is provided with a steel ball (33) which is arranged in the spring sleeve upper cover (31), and the spring sleeve upper cover (31) is threadedly connected with an adjusting bolt (47).

10. A high pressure gas drying purifier of the kind referred to in claim 9, characterised in that, The adjusting bolt (47) is threadedly engaged with the spring sleeve upper cover (31), the adjusting bolt (47) is provided with a locking nut (46), and the adjusting bolt (47) is provided with an adjusting handle (48).

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