CN110778547A - Hydraulic control system for forming internal high-pressure water-swelling pipe - Google Patents

Hydraulic control system for forming internal high-pressure water-swelling pipe Download PDF

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Publication number
CN110778547A
CN110778547A CN201911196612.1A CN201911196612A CN110778547A CN 110778547 A CN110778547 A CN 110778547A CN 201911196612 A CN201911196612 A CN 201911196612A CN 110778547 A CN110778547 A CN 110778547A
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CN
China
Prior art keywords
pressure
communicated
valve
water
way valve
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Withdrawn
Application number
CN201911196612.1A
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Chinese (zh)
Inventor
叶臻
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Jiangsu Jiatai Forging Machinery Co Ltd
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Jiangsu Jiatai Forging Machinery Co Ltd
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Priority to CN201911196612.1A priority Critical patent/CN110778547A/en
Publication of CN110778547A publication Critical patent/CN110778547A/en
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means

Abstract

The invention discloses a hydraulic control system for forming an internal high-pressure water-swelling pipe, which comprises a forming mechanism for clamping a pipe fitting and a pressure supply pipeline unit, wherein the pressure supply pipeline unit is communicated with the forming mechanism to apply ultrahigh-pressure liquid to the inside of the pipe fitting.

Description

Hydraulic control system for forming internal high-pressure water-swelling pipe
Technical Field
The invention relates to the technical field of internal high-pressure water expansion forming, in particular to a hydraulic control system for forming an internal high-pressure water expansion pipe.
Background
With the rapid development of modern industry, in the fields of automobile manufacturing, aerospace, engineering machinery and the like, the designers are attentive to save the raw material cost and reduce the operation energy consumption by reducing the mass, so that the light structure becomes an important development direction of modern advanced manufacturing technology.
At present, in the aspect of structural lightweight design, besides adopting a light composite material, another approach is to adopt a hollow pipe and a variable-section equal-strength member, and because the hollow structure can reduce weight and improve the utilization rate of materials, and can fully utilize the strength and rigidity of the materials, the method is difficult to realize by adopting other processes for some straight shafts or pipes with large geometric dimension and complicated section shapes and more bends.
Disclosure of Invention
The invention aims to provide a hydraulic control system for forming an internal high-pressure water-swelling pipe, which solves the technical problem that a pipe-shaped part with a complex shape is difficult to machine and realize.
A hydraulic control system for forming an internal high-pressure water-swelling pipe comprises a forming mechanism for clamping a pipe fitting and a pressure supply pipeline unit, wherein the pressure supply pipeline unit is communicated with the forming mechanism to apply ultrahigh-pressure liquid to the inside of the pipe fitting;
the pressure supply pipeline unit comprises a hydraulic oil tank, a first water tank, a second water tank, a high-pressure filter, a system proportion pressure regulating valve group, a high-pressure oil pump power unit, a first control valve group, a supercharger, a high-pressure three-way valve group, a second control valve group, a high-pressure water pump power unit, a low-pressure filter, a low-pressure water pump power unit and an unloading valve;
an oil inlet of the high-pressure oil pump power unit is communicated with the hydraulic oil tank, and an oil outlet of the high-pressure oil pump power unit is communicated with the system proportional pressure regulating valve bank; the high-pressure filter is respectively communicated with the system proportional pressure regulating valve group and a first control valve group, an oil outlet of the first control valve group is communicated with the supercharger, and the supercharger is communicated with the high-pressure three-way valve group; the water inlet of the high-pressure water pump power unit is communicated with the first water tank, the water outlet of the high-pressure water pump power unit is communicated with the second control valve group, the second control valve group is communicated with the high-pressure three-way valve group, and the high-pressure three-way valve group is communicated with the forming mechanism; the second water tank is communicated with the unloading valve, and the unloading valve is communicated with the forming mechanism; the first water tank and the second water tank are communicated through a low-pressure filter and a low-pressure water pump power unit.
The invention has the advantages that the number of extra supercharger branches is increased to provide extra required flow, and the water-based emulsifier is ensured to rapidly enter the pipe fitting to complete the forming processing of the pipe fitting; the product produced by the invention has light weight, good strength and rigidity and high material utilization rate, and meanwhile, the manufacturing process flow adopting the system is less, and the production cost is reduced.
On the basis of the technical scheme, the invention can be further improved as follows:
further, the waste liquid recycling device further comprises a waste liquid collecting box, wherein the waste liquid collecting box is arranged on the periphery of the forming mechanism, the bottom of the waste liquid collecting box is communicated with the second water tank, and the waste liquid recycling device has the beneficial effect that waste liquid recycling is convenient to realize.
Furthermore, the system proportion pressure regulating valve group comprises a two-way cartridge valve, a first pressure limiting valve, a proportion pressure regulating valve and a one-way valve, wherein an A port of the two-way cartridge valve is communicated with an oil outlet of the high-pressure oil pump power unit, a B port of the two-way cartridge valve is respectively communicated with the pressure limiting valve and the proportion pressure regulating valve, the pressure limiting valve and the proportion pressure regulating valve are connected in parallel and then communicated with an oil inlet of the one-way valve, and an oil outlet of the one-way valve is communicated with the high-pressure filter.
Further, the first control valve group comprises a servo flow valve, a pressure sensor and a three-position four-way valve, an A port of the servo flow valve is communicated with the high-pressure filter, a T port of the servo flow valve is communicated with a T port of the three-position four-way valve, a B port of the servo flow valve is communicated with a P port of the three-position four-way valve after the pressure sensor is connected in series, the A port and the B port of the three-position four-way valve are respectively communicated with the supercharger, and the booster supercharger has the beneficial effect that the booster can complete accurate flow control through the first control valve group.
Further, high-pressure tee bend valve body includes first superhigh pressure check valve and second superhigh pressure check valve, the water inlet of first superhigh pressure check valve and the delivery port intercommunication of second superhigh pressure check valve, and the delivery port of first superhigh pressure check valve with the forming mechanism intercommunication, the delivery port of booster with the water inlet intercommunication of first superhigh pressure check valve, the beneficial effect who adopts this step is that can keep apart high-low pressure medium and avoid water base emulsion backward flow through high-pressure tee bend valve body.
Further, the second control valve group comprises a two-position two-way valve and a second pressure limiting valve, the two-position two-way valve is communicated with the high-pressure water pump power unit, and the second pressure limiting valve is connected with the high-pressure water pump power unit in parallel.
Further, forming mechanism includes left pressure head, right pressure head, goes up mould and die holder, the periphery of die holder is provided with waste liquid collecting box, it is located the die holder top to go up the mould, and goes up the cavity that mould and die holder mutually supported formation centre gripping pipe fitting, left side pressure head, right pressure head set up respectively the pipe fitting both ends, left side pressure head, the inside hydraulic passage that has all seted up of right pressure head, hydraulic passage all with the inside intercommunication of pipe fitting, the hydraulic passage of left side pressure head with the second water tank intercommunication, the hydraulic passage of right side pressure head with first water tank intercommunication.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a hydraulic control system for forming an internal high-pressure water-swelling pipe according to embodiment 1 of the present invention;
fig. 2 is a schematic diagram of a system proportional pressure regulating valve bank of a hydraulic control system for internal high-pressure water-swelling pipe forming according to embodiment 1 of the present invention;
fig. 3 is a schematic diagram of a first control valve group of a hydraulic control system for forming an internal high-pressure water-swelling pipe according to embodiment 1 of the present invention;
reference numerals:
1-a pipe fitting; 2-a forming mechanism; 3-a pressure supply pipeline unit; 4-a waste liquid collecting box;
201-left ram; 202-right ram; 203-upper die; 204-a lower die holder; 205-a cavity; 206-hydraulic channel;
301-hydraulic oil tank; 302-a first water tank; 303-a second water tank; 304-a high pressure filter; 305-system proportional pressure regulating valve group; 306-a high pressure oil pump power unit; 307-a first control valve group; 308-a supercharger; 309-high pressure three-way valve group; 310-a second control valve group; 311-high pressure water pump power unit; 312-a low pressure filter; 313-a low pressure water pump power unit; 314-an unloading valve;
315-two-way cartridge valve; 316-a first pressure limiting valve; 317-proportional pressure regulating valve; 318-one-way valve;
319-servo flow valve; 320-a pressure sensor; 321-three-position four-way valve;
322-a first extra-high pressure check valve; 323-second extra-high pressure check valve;
324-a two-position two-way valve; 325 — a second pressure limiting valve.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
As shown in fig. 1-3, the hydraulic control system for forming an internal high-pressure water-swelling pipe provided in this embodiment includes a forming mechanism 2 for clamping a pipe 1 and a pressure supply pipeline unit 3, where the pressure supply pipeline unit 3 is communicated with the forming mechanism 2 to apply ultrahigh pressure to the inside of the pipe 1; the hydraulic control system provided by the embodiment is mainly used for applying ultrahigh pressure liquid to the interior of a pipe so as to complete workpiece forming; in this embodiment, the low pressure means a pressure lower than 16MPa, the high pressure means a pressure not lower than 16MPa, and the ultrahigh pressure means a pressure not lower than 40 MPa.
As shown in fig. 1, the pressure supply pipeline unit 3 includes a hydraulic oil tank 301, a first water tank 302, a second water tank 303, a high-pressure filter 304, a system proportional pressure regulating valve group 305, a high-pressure oil pump power unit 306, a first control valve group 307, a pressure booster 308, a high-pressure three-way valve group 309, a second control valve group 310, a high-pressure water pump power unit 311, a low-pressure filter 312, a low-pressure water pump power unit 313, and an unloading valve 314;
an oil inlet of the high-pressure oil pump power unit 306 is communicated with the hydraulic oil tank 301, and an oil outlet of the high-pressure oil pump power unit 306 is communicated with the system proportional pressure regulating valve bank 305; the high-pressure oil pump power unit 306 in this embodiment draws hydraulic oil from the hydraulic oil tank 301 for delivery, and can perform pressure regulation through the system proportional pressure regulating valve group 305;
the high-pressure filter 304 is respectively communicated with the system proportional pressure regulating valve group 305 and the first control valve group 307, an oil outlet of the first control valve group 307 is communicated with the supercharger 308, the supercharger 304 is communicated with the high-pressure three-way valve group 309, the high-pressure filter 304 is connected in series to a hydraulic channel entering the supercharger 304, hydraulic oil is filtered, and the service life of the whole system is prolonged; the water inlet of the high-pressure water pump power unit 311 is communicated with the first water tank 302, and the water outlet is communicated with the second control valve group 310; the second control valve group 310 is communicated with the high-pressure three-way valve group 309, and the high-pressure three-way valve group 309 is communicated with the forming mechanism 2; the second water tank 303 is communicated with the unloading valve 314, and the unloading valve 314 is communicated with the molding mechanism 2; the first water tank 302 is communicated with the second water tank 303 through a low-pressure filter 312 and a low-pressure water pump power unit 313; in this embodiment, the high-pressure water pump power unit 311, the second control valve group 310 and the high-pressure three-way valve group 309 form a water inlet branch, the high-pressure water pump power unit 311 is used for quickly pumping water into the water inlet branch to fill the whole water inlet branch with water, and then the supercharger 308 is used for providing pressure for the water inlet branch to quickly pressurize the interior of the pipe fitting, so that ultrahigh pressure can be provided for the interior of the pipe fitting, wherein the ultrahigh pressure mentioned in this embodiment refers to a pressure higher than 40 MPa; the first control valve group 307, the high-pressure filter 304, the system proportion pressure regulating valve group 305 and the high-pressure filter 304 form a booster branch, and the booster 308 provides ultrahigh pressure for the water inlet branch; the branch at which the unloading valve 314 is located serves as a liquid return branch, after the pipe fitting is machined, liquid can return to the second water tank 303 and is reserved for next use, and in this embodiment, the liquid in the first water tank 302 and the liquid in the second water tank 303 are water-based emulsion and are used for being conveyed into the pipe fitting to perform internal expansion forming of the pipe fitting.
As shown in fig. 1, it further comprises a waste liquid collecting box 4, the waste liquid collecting box 4 is arranged on the periphery of the forming mechanism 2, and the bottom of the waste liquid collecting box 4 is communicated with the second water tank 303; in the processing process, water-based emulsion residues are collected by the waste liquid collecting box and then sent to the second water tank 303, so that recycling is completed.
As shown in fig. 2, the system proportional pressure regulating valve group 305 includes a two-way cartridge valve 315, a first pressure limiting valve 316, a proportional pressure regulating valve 317 and a check valve 318, an a port of the two-way cartridge valve 315 is communicated with an oil outlet of the high-pressure oil pump power unit 306, a B port of the two-way cartridge valve 315 is respectively communicated with the first pressure limiting valve 316 and the proportional pressure regulating valve 317, the first pressure limiting valve 316 and the proportional pressure regulating valve 317 are connected in parallel and then communicated with an oil inlet of the check valve 318, and an oil outlet of the check valve 318 is communicated with the high-pressure filter 304; the system proportion pressure regulating valve group 305 arranged in the embodiment can regulate the pressure of the high-pressure branch, and the control of the pressure size and the precision in the pipe blank is realized through the pressurization ratio of the supercharger 308.
As shown in fig. 3, the first control valve group 307 includes a servo flow valve 319, a pressure sensor 320 and a three-position four-way valve 321, an a port of the servo flow valve 319 is communicated with the high pressure filter 304, a T port of the servo flow valve 319 is communicated with a T port of the three-position four-way valve 321, a B port of the servo flow valve 319 and the pressure sensor 320 are connected in series and then communicated with a P port of the three-position four-way valve 321, and the a port and the B port of the three-position four-way valve 321 are respectively communicated with an oil inlet and an oil outlet of the supercharger 308; the control valve group is mainly used for controlling the flow of oil in and out of the supercharger 308 so as to realize quick supercharging inside the pipe blank.
As shown in fig. 1-3, the high-pressure three-way valve body 309 includes a first ultrahigh-pressure check valve 322 and a second ultrahigh-pressure check valve 323, a water inlet of the first ultrahigh-pressure check valve 322 is communicated with a water outlet of the second ultrahigh-pressure check valve 323, a water outlet of the first ultrahigh-pressure check valve 322 is communicated with the molding mechanism 2, and a water outlet of the supercharger 308 is communicated with a water inlet of the first ultrahigh-pressure check valve 322; in this embodiment, the high-pressure three-way valve body 309 mainly comprises two check valves, and the second extra-high pressure check valve 323 is communicated with the second control valve group 310, so that when the pressure booster 308 provides pressure, high-pressure and low-pressure media can be isolated and high-pressure water can be prevented from flowing back.
As shown in fig. 1, the second control valve set 310 includes a two-position two-way valve 324 and a second pressure limiting valve 325, the two-position two-way valve 324 is communicated with the high pressure water pump power unit 311, and the second pressure limiting valve 325 is connected in parallel with the high pressure water pump power unit 311.
As shown in fig. 1, the forming mechanism 2 includes a left press head 201, a right press head 202, an upper die 203 and a lower die holder 204, the waste liquid collecting box 4 is disposed on the periphery of the lower die holder 204, the upper die 203 is located above the lower die holder 204, the upper die 203 and the lower die holder 204 are matched with each other to form a cavity 205 for clamping the pipe fitting, the left press head 201 and the right press head 202 are respectively disposed at two ends of the pipe fitting 1, hydraulic passages 206 are respectively disposed inside the left press head 201 and the right press head 202, and the hydraulic passages 206 are respectively communicated with the inside of the pipe fitting 1 and a second water tank 303; in the embodiment, the forming mechanism 2 only needs to clamp a workpiece, and in actual operation, pressure needs to be provided for the upper die, the left pressure head and the right pressure head respectively to clamp the pipe fitting; the hydraulic channel 206 of the right ram is communicated with the water inlet branch as a main liquid inlet channel, and the hydraulic channel 206 of the left ram is communicated with the liquid return branch to mainly realize the pressure balance function.
The working principle of the embodiment is as follows:
when the pipe fitting is actually used, the pipe fitting 1 is clamped by the upper die 203 and the lower die holder 204, and then the left pressure head 201 and the right pressure head 202 are pressed to two ends of the pipe fitting 1, so that the hydraulic channel 206 is communicated with the interior of the pipe fitting 1; the high-pressure water pump power unit 311 is started firstly, so that water-based emulsion enters the interior of the pipe fitting through the second control valve group 310 and the high-pressure three-way valve group 309, water is filled in the water inlet branch, after the internal pressure of the pipe fitting reaches a certain value, the pressure provided by the high-pressure water pump power unit 311 is insufficient, at the moment, the high-pressure oil pump power unit 306 is started, hydraulic oil passes through the preset proportional pressure regulating valve group 305, the high-pressure filter 304 filters the hydraulic oil, the flow is controlled by the first control valve group 307, so that power transmission to the booster 308 is completed, at the moment, the booster 308 provides ultrahigh pressure for the water inlet branch, so that the water-based emulsion continues to enter the interior of the pipe fitting 1, the pressure in the interior.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (7)

1. The hydraulic control system for forming the internal high-pressure water-swelling pipe is characterized by comprising a forming mechanism for clamping a pipe fitting and a pressure supply pipeline unit, wherein the pressure supply pipeline unit is communicated with the forming mechanism to apply ultrahigh-pressure liquid to the inside of the pipe fitting;
the pressure supply pipeline unit comprises a hydraulic oil tank, a first water tank, a second water tank, a high-pressure filter, a system proportion pressure regulating valve group, a high-pressure oil pump power unit, a first control valve group, a supercharger, a high-pressure three-way valve group, a second control valve group, a high-pressure water pump power unit, a low-pressure filter, a low-pressure water pump power unit and an unloading valve;
an oil inlet of the high-pressure oil pump power unit is communicated with the hydraulic oil tank, and an oil outlet of the high-pressure oil pump power unit is communicated with the system proportional pressure regulating valve bank; the high-pressure filter is respectively communicated with the system proportional pressure regulating valve group and a first control valve group, an oil outlet of the first control valve group is communicated with the supercharger, and the supercharger is communicated with the high-pressure three-way valve group; the water inlet of the high-pressure water pump power unit is communicated with the first water tank, the water outlet of the high-pressure water pump power unit is communicated with the second control valve group, the second control valve group is communicated with the high-pressure three-way valve group, and the high-pressure three-way valve group is communicated with the forming mechanism; the second water tank is communicated with the unloading valve, and the unloading valve is communicated with the forming mechanism.
2. The hydraulic control system for forming the internal high-pressure water-swelling pipe according to claim 1, further comprising a waste liquid collecting tank, wherein the waste liquid collecting tank is arranged on the periphery of the forming mechanism, and the bottom of the waste liquid collecting tank is communicated with the second water tank.
3. The hydraulic control system for forming the internal high-pressure water-swelling pipe according to claim 2, wherein the system proportional pressure regulating valve group comprises a two-way cartridge valve, a first pressure limiting valve, a proportional pressure regulating valve and a one-way valve, an A port of the two-way cartridge valve is communicated with an oil outlet of the high-pressure oil pump power unit, a B port of the two-way cartridge valve is communicated with the pressure limiting valve and the proportional pressure regulating valve respectively, the pressure limiting valve and the proportional pressure regulating valve are connected in parallel and then communicated with an oil inlet of the one-way valve, and an oil outlet of the one-way valve is communicated with the high-pressure filter.
4. The hydraulic control system for forming the internal high-pressure water-swelling pipe according to claim 3, wherein the first control valve set comprises a servo flow valve, a pressure sensor and a three-position four-way valve, wherein an A port of the servo flow valve is communicated with the high-pressure filter, a T port of the servo flow valve is communicated with a T port of the three-position four-way valve, a B port of the servo flow valve is communicated with a P port of the three-position four-way valve after being connected with the pressure sensor in series, and the A port and the B port of the three-position four-way valve are respectively communicated with an oil inlet and an oil outlet of the supercharger.
5. The hydraulic control system for forming the internal high-pressure water-swelling pipe according to claim 4, wherein the high-pressure three-way valve body comprises a first ultrahigh-pressure one-way valve and a second ultrahigh-pressure one-way valve, a water inlet of the first ultrahigh-pressure one-way valve is communicated with a water outlet of the second ultrahigh-pressure one-way valve, a water outlet of the first ultrahigh-pressure one-way valve is communicated with the forming mechanism, and a water outlet of the supercharger is communicated with a water inlet of the first ultrahigh-pressure one-way valve.
6. The hydraulic control system for forming the internal high-pressure water expansion pipe as claimed in claim 5, wherein the second control valve set comprises a two-position two-way valve and a second pressure limiting valve, the two-position two-way valve is communicated with the high-pressure water pump power unit, and the second pressure limiting valve is connected with the high-pressure water pump power unit in parallel.
7. The hydraulic control system for forming the internal high-pressure water swelling pipe according to any one of claims 1 to 6, wherein the forming mechanism comprises a left pressing head, a right pressing head, an upper die and a lower die holder, the waste liquid collecting box is arranged on the periphery of the lower die holder, the upper die is positioned above the lower die holder, the upper die and the lower die holder are matched with each other to form a cavity for clamping the pipe, the left pressing head and the right pressing head are respectively arranged at two ends of the pipe, hydraulic channels are respectively arranged inside the left pressing head and the right pressing head and are communicated with the inside of the pipe, the hydraulic channel of the left pressing head is communicated with the second water tank, and the hydraulic channel of the right pressing head is communicated with the first water tank.
CN201911196612.1A 2019-11-28 2019-11-28 Hydraulic control system for forming internal high-pressure water-swelling pipe Withdrawn CN110778547A (en)

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Application Number Priority Date Filing Date Title
CN201911196612.1A CN110778547A (en) 2019-11-28 2019-11-28 Hydraulic control system for forming internal high-pressure water-swelling pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911196612.1A CN110778547A (en) 2019-11-28 2019-11-28 Hydraulic control system for forming internal high-pressure water-swelling pipe

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Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111922197A (en) * 2020-07-29 2020-11-13 江苏银羊不锈钢管业有限公司 Automatic production equipment for bent pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111922197A (en) * 2020-07-29 2020-11-13 江苏银羊不锈钢管业有限公司 Automatic production equipment for bent pipes

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Application publication date: 20200211