阅读说明：本技术 一种直驱式液压铆接系统 (Direct-drive hydraulic riveting system ) 是由 郭龙 贾云龙 赵祥云 张小连 李传奇 李伟 张帅 杨林 罗明洋 郭少卿 毛俊 于 2021-05-22 设计创作，主要内容包括：本发明公开了一种直驱式液压铆接系统。包括液压铆接工具、与液压铆接工具联接实现铆接驱动控制的三位四通电磁换向阀和电控系统,系统包括由发动机驱动的三组液压泵,其中,液压泵一与液压泵二输出端并联后与单向阀前端联接,单向阀另一端与液压泵三输出端并联后与三位四通电磁换向阀入口联接；单向阀前端设置溢流阀一,液压泵三输出端依次设置溢流阀二和溢流阀三；液压铆接工具设置有用于检测铆接工具有杆腔与无杆腔之间压力的压力继电器。本发明采用高压小流量和低压大流量的方式实现液压铆接,节约能源；可以铆接短尾模式拉铆钉、拉断模式拉铆钉。工作时无需外接电力系统,安全可靠。(The invention discloses a direct-drive hydraulic riveting system. The system comprises three groups of hydraulic pumps driven by an engine, wherein a first hydraulic pump is connected with a second output end of the hydraulic pump in parallel and then connected with the front end of a one-way valve, and the other end of the one-way valve is connected with a third output end of the hydraulic pump in parallel and then connected with an inlet of the three-position four-way electromagnetic directional valve; the front end of the one-way valve is provided with a first overflow valve, and the output end of the hydraulic pump III is sequentially provided with a second overflow valve and a third overflow valve; the hydraulic riveting tool is provided with a pressure relay for detecting the pressure between the rod cavity and the rodless cavity of the riveting tool. The invention realizes hydraulic riveting by adopting a mode of high pressure small flow and low pressure large flow, thereby saving energy; the rivet can be riveted with a short tail mode rivet and a snap mode rivet. The working process does not need an external power system, and is safe and reliable.)

1. The utility model provides a direct-drive hydraulic riveting system, includes hydraulic riveting instrument, realizes riveting drive control's tribit four-way solenoid directional valve and electrical system with hydraulic riveting instrument hookup, its characterized in that:

the system comprises three groups of hydraulic pumps driven by an engine, wherein a first hydraulic pump is connected with the front end of a one-way valve after being connected with the second output end of the hydraulic pump in parallel, and the other end of the one-way valve is connected with the third output end of the hydraulic pump in parallel and then is connected with the inlet of a three-position four-way electromagnetic directional valve; the front end of the one-way valve is provided with a first overflow valve, and the output end of the hydraulic pump III is sequentially provided with a second overflow valve and a third overflow valve; the hydraulic riveting tool is provided with a pressure relay for detecting the pressure between the rod cavity and the rodless cavity of the riveting tool.

2. The direct drive hydraulic riveting system of claim 1, wherein: the first overflow valve is used for detecting the pressure at two ends of the check valve, opening and closing according to set pressure, and is matched with the check valve to realize conversion pressure relief of high-pressure small flow and low-pressure large flow.

3. The direct drive hydraulic riveting system of claim 1, wherein: and the second overflow valve is a safety valve and is used for limiting the highest pressure of the system to realize safe pressure relief.

4. The direct drive hydraulic riveting system of claim 1, wherein: and the overflow valve III is a system riveting pressure regulating valve and is used for setting riveting pressure for corresponding riveting purposes, realizing riveting pressure setting required by riveting for different purposes and releasing pressure when overpressure occurs.

5. The direct drive hydraulic riveting system of claim 1, wherein: the pressure relay is used for sending a signal to release the pressure of the system for standby again after detecting that the pistons of the rod cavity and the rodless cavity of the riveting tool reset.

6. The direct drive hydraulic riveting system of claim 1, wherein: the engine is a gasoline engine or a diesel engine with a power output shaft.

7. The direct drive hydraulic riveting system of claim 1, wherein: the riveting system adopts a horizontal shaft output structure.

8. The direct drive hydraulic riveting system of claim 1, wherein: the riveting system adopts a vertical shaft output structure.

9. The direct drive hydraulic riveting system of claim 1, wherein: the hydraulic pumps are plunger hydraulic pumps, and plunger hydraulic pump heads are distributed on a single plane or a plurality of planes in parallel.

10. The direct drive hydraulic riveting system of claim 1, wherein: the riveting system is provided with a main oil tank, each pressure relief oil pipe is connected with the main oil tank in a backflow mode, and each hydraulic pump is completely immersed in the main oil tank.

Technical Field

The invention belongs to the technical field of riveting fastening, particularly belongs to the technical field of designing and manufacturing of riveting fastening equipment, and particularly relates to a direct-drive hydraulic riveting system.

Background

Along with the installation of domestic and foreign solar market supports, the riveting operation of domestic and foreign iron towers, the field of bridge steel member riveting construction and the like is greatly developed, the market of rivet pulling requirements is gradually expanded, reliable installation equipment is required to be arranged on a construction site, but under most conditions, no electric energy which can be directly and conveniently used exists, the existing riveting equipment is driven by a motor, the motor is driven by 220V alternating current or 380V alternating current power supply, and the existing riveting equipment cannot work without electric drive. Meanwhile, a small self-contained generator set is adopted to supply power to conventional hydraulic riveting equipment, the equipment components are multiple, the voltage output of the generator set is unstable, and damage to parts of a system, components and a hydraulic system is easily caused. Therefore, a power output direct-drive hydraulic riveting system is developed to meet the requirement that under the condition that no direct available electric power exists in the field, the installation efficiency is improved, and the installation of rivets is realized.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the direct-drive hydraulic riveting system, the rated pressure of the riveting system can reach 70MPa, the riveting operation can be realized without externally connecting electric energy, and the direct-drive hydraulic riveting system is compact in structure, safe and reliable.

The invention is realized by the following technical scheme:

direct-drive hydraulic riveting system, including hydraulic riveting instrument, with hydraulic riveting instrument hookup realize riveting drive control's tribit four-way solenoid directional valve and electrical system, its characterized in that:

the system comprises three groups of hydraulic pumps driven by an engine, wherein a first hydraulic pump is connected with the front end of a one-way valve after being connected with the second output end of the hydraulic pump in parallel, and the other end of the one-way valve is connected with the third output end of the hydraulic pump in parallel and then is connected with the inlet of a three-position four-way electromagnetic directional valve; the front end of the one-way valve is provided with a first overflow valve, and the output end of the hydraulic pump III is sequentially provided with a second overflow valve and a third overflow valve; the hydraulic riveting tool is provided with a pressure relay for detecting the pressure between the rod cavity and the rodless cavity of the riveting tool.

The overflow valve I is used for detecting the pressure at two ends of the check valve, opening and closing according to the set pressure and realizing the conversion pressure relief of high-pressure small flow and low-pressure large flow by matching with the check valve.

The second overflow valve is a safety valve and is used for limiting the highest pressure of the system to realize safe pressure relief.

The overflow valve III is a system riveting pressure regulating valve and is used for setting riveting pressure for corresponding riveting purposes, realizing riveting pressure setting required by riveting for different purposes and releasing pressure when overpressure occurs.

The pressure relay is used for sending a signal to release the pressure of the system for standby again after detecting that the pistons of the rod cavity and the rodless cavity of the riveting tool reset.

The engine of the invention is a gasoline engine or a diesel engine with a power output shaft.

The riveting system adopts a horizontal shaft output structure, namely, an output shaft of a gasoline engine is in a horizontal output mode, the output shaft is vertical to the installation position, and a hydraulic system is horizontally installed.

The riveting system can also adopt a vertical shaft output structure, namely, the output shaft of the gasoline engine is in a vertical output mode, the output shaft is horizontal to the installation position, and the hydraulic system is vertically installed.

The hydraulic pumps of the invention can adopt plunger hydraulic pumps, and the plunger hydraulic pump heads are distributed on a single plane or a plurality of planes in parallel.

The riveting system is provided with a main oil tank, each pressure relief oil pipe is connected with the main oil tank in a backflow mode, and each hydraulic pump is completely immersed in the main oil tank.

The invention has the beneficial effects that: the invention realizes hydraulic riveting by adopting a high-pressure small-flow and low-pressure large-flow mode, thereby saving energy. The rivet can be riveted with a short tail mode rivet and a snap mode rivet. The working process does not need an external power system, and is safe and reliable.

Drawings

FIG. 1 is a schematic diagram of a hydraulic riveting system of the present invention;

FIG. 2 is a schematic view of an engine driving two riveting systems according to the present invention;

FIG. 3 is a schematic diagram of a plunger hydraulic pump head arrangement of three sets of pump heads;

fig. 4 is a schematic diagram of a plunger hydraulic pump head arrangement for six sets of pump heads.

In the figure, 1 is a first hydraulic pump, 2 is a second hydraulic pump, 3 is a third hydraulic pump, 4 is a first overflow valve, 5 is a second overflow valve, 6 is a third overflow valve, 7 is a three-position four-way electromagnetic directional valve, 8 is a one-way valve, 9 is a pressure relay, 10 is a hydraulic riveting tool, 11 is an engine, 12 is a plunger pump head, and 13 is an eccentric bearing.

Detailed Description

The present invention is further described below in conjunction with the following detailed description, which is intended to further illustrate the principles of the invention and is not intended to limit the invention in any way, but is equivalent or analogous to the present invention without departing from its scope.

With reference to the attached drawings.

The direct-drive hydraulic riveting system comprises a hydraulic pump, a hydraulic valve, a hydraulic oil tank, an electric control part and the like, wherein a gasoline engine is adopted as a direct-drive power source in the embodiment. The output shaft of the gasoline engine is connected with a rolling bearing, and a plurality of hydraulic pump heads drive a hydraulic pump to realize the oil absorption and oil discharge process through the eccentric rolling of the bearing. The whole hydraulic pump is fully immersed in the hydraulic oil tank. All plunger pump heads and hydraulic valves of the present embodiment are integrated on an integrated block, the integrated level is high, the structure is compact, the weight is low, the volume is small, and a quick connector is mounted on the integrated block, so that the pipeline can be conveniently plugged and pulled out.

The invention adopts a hydraulic driving mode, has high-pressure small-flow and low-pressure large-flow output modes, and when the system works at low pressure, such as a riveter is in an empty load state or a low load state, multiple pumps supply oil simultaneously, and the riveter moves quickly, so that the working efficiency is improved; when the riveter is riveted, part of the pumps are in an unloading state, and only one pump is in a high-pressure state, so that a high-pressure small-flow mode is realized, and energy is saved.

In order to ensure the pressure of the system and ensure the use safety of the riveting system, the pressure of the hydraulic riveting system is adjusted, and a system pipeline and the like are connected with an overflow valve in parallel.

The reversing valve of the riveting system is a three-position four-way electromagnetic reversing valve, and the middle position function is H-shaped.

The riveting system can adopt a horizontal shaft output mode or a vertical shaft output mode, can realize riveting of one riveting gun, and can also realize simultaneous riveting of a plurality of riveting guns.

As shown in the figure, hydraulic oil at the outlets of a first hydraulic pump 1 and a second hydraulic pump 2 which are connected in parallel is connected with a one-way valve 8 through a pipeline, the other end of the one-way valve 8 is connected with a third hydraulic pump 3 in parallel through a pipeline and then connected with a three-position four-way electromagnetic directional valve 7, and the other side of the three-position four-way electromagnetic directional valve 7 is connected with a riveting gun 10 through a pipeline; an overflow valve I4 is arranged on the pipeline of the outlet ends of the hydraulic pump I1 and the hydraulic pump II 2 which are connected in parallel and the check valve 8; and an overflow valve III 6 and an overflow valve II 5 are arranged on a connecting pipeline between the hydraulic pump III 3 and the three-position four-way electromagnetic directional valve 7.

When the riveting gun is in no-load, the working pressure is lower than the set pressure of the overflow valve I4, the hydraulic pump I1, the hydraulic pump II 2 and the hydraulic pump III 3 supply oil simultaneously, the output mode is a low-pressure large-flow output mode, the riveting gun moves quickly, and the working efficiency is improved; when the riveting gun is riveted, when the working pressure of the system is greater than the set pressure of the first overflow valve 4, the first overflow valve 4 is opened, the first hydraulic pump 1 and the second hydraulic pump 2 are unloaded, the one-way valve 8 is closed, and the third hydraulic pump 3 supplies oil, so that the riveting gun is in a high-pressure small-flow mode, and the energy is saved. And the overflow valve III 6 is a system pressure regulating valve and is mainly used for regulating riveting pressure of a rivet, and a broken nail and a short-tail nail can be riveted. The second overflow valve 5 is a safety valve, limits the highest pressure of the system and plays a role in safety protection.

The riveting system can adopt a horizontal shaft output mode or a vertical shaft output mode, can realize riveting by one riveting gun, and can also realize simultaneous riveting by a plurality of riveting guns. As shown in fig. 2, fig. 2 is a schematic diagram of two riveting systems driven by one engine, and the riveting of a riveter can be realized by considering part i independently; but through the parallel mode, increase II parts, even more, can realize two riveters or more riveters riveting.

As shown in fig. 3 and 4, fig. 3 is a schematic diagram of the arrangement of plunger hydraulic pump heads of three groups of pump heads; fig. 4 is a schematic diagram of a plunger hydraulic pump head arrangement for six sets of pump heads. The riveting system can also realize riveting of a plurality of riveters by plunger hydraulic pumps with six groups of pump heads in the figure 4, wherein the plunger heads are distributed on one plane.

The working process of the scheme is as follows: pressing down a button of the riveting gun, electrifying an electromagnet a on the left side of the three-position four-way electromagnetic reversing valve 7, feeding oil into a rod gun of the riveting gun 10, and starting riveting; after riveting is completed, a button of a riveter is loosened, the left electromagnet a loses power, the right electromagnet b gets power, the rodless cavity is filled with oil, the riveter resets, when the riveter resets to a stroke end point, the pressure relay 9 sends a signal, the left electromagnet a and the right electromagnet b lose power, the system unloads, and no-load operation is realized.