阅读说明：本技术 一种内高压水胀管材成型的液压控制系统 (Hydraulic control system for forming internal high-pressure water-swelling pipe ) 是由 叶臻 于 2019-11-28 设计创作，主要内容包括：本发明公开一种内高压水胀管材成型的液压控制系统,包括用于夹持管件的成型机构和供压管路单元,供压管路单元与成型机构连通给管件的内部施加超高压液体,本发明解决了现有技术中形状复杂的管型件难以加工实现的技术问题。(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.)

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.

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.