CN216767905U

CN216767905U - External hanging type prestress tensioning system for oil tank

Info

Publication number: CN216767905U
Application number: CN202220369883.3U
Authority: CN
Inventors: 罗斌; 牟笑静; 廖强; 詹志峰; 方正; 方宗平
Original assignee: Nanjing Research Institute Of Chongqing University; Sichuan Jiaoda Prestressed Engineering Testing Technology Co ltd
Current assignee: Nanjing Research Institute Of Chongqing University; Sichuan Jiaoda Prestressed Engineering Testing Technology Co ltd
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2022-06-17
Anticipated expiration: 2032-02-23

Abstract

The utility model provides an external-hanging type prestress tensioning system of an oil tank, which comprises the oil tank and a closed hydraulic system which is connected with the oil tank and provides power for a hydraulic executive part, wherein the oil tank is provided with an oil outlet and an oil return opening; the oil tank oil-out and oil tank oil return opening all are connected with hydraulic pressure and proclaim oneself quick interface, are the interface that connects soon and the oil return of producing oil respectively, and the interface that connects soon and the oil return of producing oil can with closed hydraulic system's oil inlet and oil return opening difference plug-in connection. The oil tank is externally hung on a closed hydraulic system, is used for tensioning construction of a prestressed project, and can be compatible with all application scenes of the prestressed project. The oil tank is designed according to needs, the overall dimension of the tensioning system is reduced, the weight of the tensioning system is reduced, the service life of the machine is prolonged, and the maintenance cost of equipment is reduced.

Description

External hanging type prestress tensioning system for oil tank

Technical Field

The utility model belongs to the technical field of prestress tensioning, and particularly relates to an external-hanging type prestress tensioning system for an oil tank.

Background

In the field of infrastructure construction of highways, railways, water conservancy, energy, municipal administration and the like, the prestress technology is widely applied to engineering structures such as bridges, tunnels, side slopes, dams and the like due to the unique economic advantages of the prestress technology.

At present, the common prestressed tensioning jack has more than 10 types from 25 tons to 500 tons, and the corresponding hydraulic oil capacity requirement is from 1L to 55L. In order to keep the universality during production and manufacturing, equipment manufacturers basically adopt oil tanks with uniform specifications, and do not customize the oil tanks according to the calculation of oil supply quantity, so that tensioning construction machines and tools generally have the phenomena of thickness, size and bulkiness. For example, in a tensioning system of a certain company, the overall dimensions are (length × width × height): 65X 60X 105cm, the weight is 110Kg, the external dimension of the oil tank is (length X width X height): 35X 50X 30cm and a weight of 45 Kg. Therefore, the external dimension of the oil tank accounts for about 1/7 and the weight accounts for about 50 percent.

The oil tank of the existing tensioning system abandons the principle of design according to needs and adopts a rough compatible means, which directly causes the problems of poor adaptability, poor economical efficiency, inconvenient use and the like of the tensioning system. Specific disadvantages and shortcomings are:

(1) because the scene of the engineering construction site is complex and the differentiation is large, other application scenes except the precast beam field are mostly in dangerous environments such as high altitude, narrow or adjacent edges, in some positions and spaces, the overall dimension of the prestressed construction machine is large and is difficult to reach or effective construction operation is difficult to carry out, the condition of not constructing or not constructing in place exists, the engineering quality is difficult to ensure comprehensively, and the quality safety risk problem also exists.

(2) Due to frequent progress and process conversion of the engineering construction site, machines and tools need to be transferred for many times in the construction process, and a large-size and high-weight tensioning system generally needs multiple workers to carry in the narrow and steep application scenes of the site roads. In order to solve the carrying problem, some special working conditions need to arrange appointed personnel to assist on site, which wastes time and labor. The traditional organization form wastes a large amount of manpower and material resources, and has the problem of low efficiency although the cost is high.

(3) At present, an open oil tank is mainly adopted in a prestress tensioning system. However, the construction site of the prestressed engineering has heavy dust, hydraulic oil can be frequently replaced after being polluted, the failure rate of the hydraulic oil is greatly increased after being polluted, and machine tools can be frequently maintained in a shutdown way, so that the problems of low service life of equipment, high maintenance cost and the like are solved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems in the prior art, and aims to provide an external-hanging type prestress tensioning system for an oil tank.

In order to achieve the purpose, the utility model adopts the following technical scheme: the external-hanging type prestress tensioning system comprises an oil tank and a closed hydraulic system which is connected with the oil tank and provides power for a hydraulic actuating element, wherein the oil tank is provided with an oil outlet and an oil return port; the oil tank and the split of closed hydraulic system set up and the oil tank is hung externally on closed hydraulic system, and oil tank oil-out and oil tank oil return opening all are connected with hydraulic pressure and proclaim oneself quick interface, connect interface and oil return fast interface for producing oil respectively, and the interface is connected with the oil return fast to produce oil and the oil return fast interface can be connected with closed hydraulic system's oil inlet and oil return opening grafting respectively.

According to the technical scheme, the oil tank is externally hung on the closed hydraulic system, is used for tensioning construction of the prestress engineering, and can be compatible with all application scenes of the prestress engineering. The oil tank is designed as required, the overall dimension of the tensioning system is reduced, the weight of the tensioning system is reduced, the service life of the machine tool is prolonged, and the maintenance cost of the equipment is reduced.

In a preferred embodiment of the utility model, the oil tank is positioned at the top of the closed hydraulic system, and the two hydraulic self-sealing quick connectors are arranged at the bottom of the oil tank.

Among the above-mentioned technical scheme, set up the oil tank at closed hydraulic system's top, can reduce this tensioning system's whole length and width, do benefit to the effective development of construction operation.

In a preferred embodiment of the utility model, after the oil tank is connected with the closed hydraulic system, the hydraulic self-sealing quick connector can be automatically opened under the action of hydraulic oil in the oil tank; or the hydraulic self-sealing quick connector is integrated with a switch valve.

In the technical scheme, two modes for controlling the on-off of the oil in the oil tank and the closed hydraulic system are provided. The first hydraulic self-sealing quick connector is normally closed, and is opened by the pressure of hydraulic oil in the oil tank; the other is to control the on-off of the oil by operating a switch valve.

In a preferred embodiment of the present invention, the oil tank is a sealed oil tank, and an energy storage air bag filled with pressure gas is further installed inside the oil tank.

Among the above-mentioned technical scheme, airtight oil tank can stop fluid and outside contact, guarantees the cleanliness of fluid. The energy storage air bag is used for self-adaptively adjusting the internal pressure of the oil tank, provides oil inlet pressure for the hydraulic pump when the closed hydraulic system works, reduces the requirement on the self-priming pressure of the hydraulic pump, and fundamentally avoids the problems that the hydraulic pump cannot absorb oil due to weak self-priming capacity and equipment faults are caused by air entering the hydraulic pump.

In a preferred embodiment of the utility model, the gas filled in the energy storage airbag is an inert gas.

In another preferred embodiment of the utility model, the closed hydraulic system comprises a case shell, an oil inlet and an oil return port of the closed hydraulic system are both arranged on the case shell, and a hydraulic pump and a hydraulic valve block integrated with a hydraulic valve group are arranged in the case shell; the hydraulic pump is provided with a low-pressure inlet and a high-pressure outlet, and the hydraulic valve block is provided with a first oil port for oil inlet, a second oil port for pressure relief and overflow, and a third oil port and a fourth oil port which are respectively connected with an oil inlet and an oil outlet of the hydraulic actuating piece; the low pressure inlet of the hydraulic pump is connected with the oil outlet quick connector, the high pressure outlet of the hydraulic pump is connected with the first oil port of the hydraulic valve block, and the second oil port of the hydraulic valve block is connected with the oil return quick connector.

In another preferred embodiment of the present invention, the hydraulic valve group includes a three-position four-way electromagnetic directional valve, a pressure sensor for measuring an oil outlet pressure of the hydraulic pump, and a flow sensor for measuring an oil outlet flow of the hydraulic pump, and the three-position four-way electromagnetic directional valve has four ports, and the four ports are respectively connected to the first oil port, the second oil port, the third oil port, and the fourth oil port of the hydraulic valve block.

In another preferred embodiment of the present invention, the hydraulic valve block further includes a check valve provided on an oil supply line connecting the high pressure outlet of the hydraulic pump and the first port of the hydraulic valve block.

Among the above-mentioned technical scheme, set up the check valve and make hydraulic oil from the one-way flow direction of oil tank oil supply line.

In another preferred embodiment of the present invention, the hydraulic valve block further comprises a high pressure relief valve; the high-pressure overflow valve is arranged on an overload protection pipeline which is connected with the first oil port and the second oil port of the hydraulic valve block, or the high-pressure overflow valve is arranged on the overload protection pipeline which is connected with the high-pressure outlet of the hydraulic pump and the second oil port of the hydraulic valve block.

Among the above-mentioned technical scheme, set up high-pressure overflow valve in order to carry out overload protection to the oil supply pipeline.

In another preferred embodiment of the utility model, a controller is also mounted in the housing and is connected to the hydraulic valve block.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic sectional view of an external-hanging type prestress tensioning system of an oil tank according to the application.

Fig. 2 is a hydraulic schematic diagram of the externally-hung type prestress tensioning system of the oil tank.

Reference numerals in the drawings of the specification include: the hydraulic control system comprises an oil tank 10, an oil outlet quick connection interface 11, an oil return quick connection interface 12, an energy storage air bag 13, a closed hydraulic system 20, a tank shell 21, a hydraulic pump 21, a low-pressure inlet 211, a high-pressure outlet 212, a hydraulic valve block 23, a first oil port P, a second oil port T, a third oil port A, a fourth oil port B, a hydraulic valve group 24, a check valve 241, a high-pressure overflow valve 242, a three-position four-way electromagnetic reversing valve 243, a sensor 244, a controller 25 and a hydraulic actuator 30.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

The utility model provides an oil tank externally-hung type prestress tensioning system, which is shown in figures 1 and 2 and comprises an oil tank 10 and a closed hydraulic system 20 which is connected with the oil tank 10 and is used for providing power for a hydraulic actuating member 30 (a tensioning jack) in a preferred embodiment of the utility model. The oil tank 10 is provided with an oil outlet and an oil return port, the oil outlet of the oil tank 10 is connected with the oil inlet of the closed hydraulic system 20, and the oil return port of the oil tank 10 is connected with the oil return port of the closed hydraulic system 20. In the present embodiment, the closed hydraulic system 20 may adopt a hydraulic system commonly used in a tensioning system in the prior art, and the hydraulic actuator 30 is supplied with high-pressure oil by the hydraulic pump 21.

The oil tank 10 and the closed hydraulic system 20 are arranged separately, the oil tank 10 is externally hung on the closed hydraulic system 20, and preferably, the oil tank 10 is located at the top of the closed hydraulic system 20. The oil outlet of the oil tank 10 and the oil return port of the oil tank 10 are both connected with hydraulic self-sealing quick connectors which are respectively an oil outlet quick connector 11 and an oil return quick connector 12. Two hydraulic self-sealing quick connectors are arranged at the bottom of the oil tank 10, and the oil outlet quick connector 11 and the oil return quick connector 12 can be respectively connected with an oil inlet and an oil return opening of the closed hydraulic system 20 in an inserting manner.

Specifically, the hydraulic self-sealing quick connector is integrated with a pressure switch valve in the prior art, when the oil tank 10 is upright, the hydraulic self-sealing quick connector is positioned at the top of the oil tank 10, and the pressure switch valve is closed; when the oil tank 10 is inserted in the closed hydraulic system 20 in an inverted manner, the pressure switch valve is opened under the action of oil pressure in the oil tank 10, so that the oil tank 10 is communicated with the pipeline of the closed hydraulic system 20. Or the hydraulic self-sealing quick connector is integrated with a switch valve, and the on-off of the oil is controlled by operating the switch valve. Certainly, the hydraulic self-sealing quick connector can also be sealed by plastic package paper, when the oil tank 10 is inversely inserted on the closed hydraulic system 20, the plastic package paper is damaged, the communication between the oil tank 10 and the pipeline of the closed hydraulic system 20 is realized, the structure is similar to that of the interface of barreled water of a water dispenser, and details are not described herein.

By adopting the technical scheme, the oil tank 10 is externally hung on the closed hydraulic system 20, the proper oil tank 10 can be selected according to the field tensioning working condition and the requirement (the size of a tensioning jack) of an engineering construction project, and the hydraulic self-sealing quick connector of the oil tank 10 is inserted into the closed hydraulic system 20 to complete the installation of the oil tank 10.

In another preferred embodiment, the oil tank 10 is a sealed oil tank, the energy storage air bag 13 filled with pressure gas is further installed inside the oil tank 10, and the gas filled in the energy storage air bag 13 is inert gas. The energy storage air bag 13 is used for self-adaptively adjusting the internal pressure of the oil tank 10, and provides oil inlet pressure for the hydraulic pump 21 when the closed hydraulic system 20 works, so that the requirement on the self-priming pressure of the hydraulic pump 21 is reduced, and the problems that the hydraulic pump 21 cannot absorb oil due to weak self-priming capability and equipment is failed due to air entering the hydraulic pump 21 are fundamentally avoided.

In another preferred embodiment, the closed hydraulic system 20 includes a housing 21, an oil inlet and an oil return of the closed hydraulic system 20 are both provided on the housing 21, and a hydraulic pump 21 and a hydraulic valve block 23 integrated with a hydraulic valve group 24 are installed in the housing 21. The hydraulic pump 21 has a low pressure inlet 211 and a high pressure outlet 212, and the hydraulic valve block 23 has a first port P for oil intake, a second port T for pressure relief and overflow, and a third port a and a fourth port B respectively connected to an oil inlet and an oil outlet of the hydraulic actuator 30. A low-pressure inlet 211 of the hydraulic pump 21 is connected with the oil outlet quick connector 11, a high-pressure outlet 212 of the hydraulic pump 21 is connected with a first oil port P of the hydraulic valve block 23, and a second oil port T of the hydraulic valve block 23 is connected with the oil return quick connector 12.

Specifically, the hydraulic valve group 24 includes a check valve 241, a high-pressure relief valve 242, a three-position four-way electromagnetic directional valve 243, and a sensor 244, and the sensor 244 includes a pressure sensor for measuring the discharge pressure of the hydraulic pump 21, and a flow sensor for measuring the discharge flow rate of the hydraulic pump 21. The check valve 241 is provided on an oil supply line connecting the high-pressure outlet 212 of the hydraulic pump 21 and the first port P of the hydraulic valve block 23. The high-pressure relief valve 242 is provided on an overload protection pipe connecting the first port P and the second port T of the hydraulic valve block 23, or the high-pressure relief valve 242 is provided on an overload protection pipe connecting the high-pressure outlet 212 of the hydraulic pump 21 and the second port T of the hydraulic valve block 23. The three-position four-way electromagnetic directional valve 243 has four ports, and the four ports are respectively connected to the first port P, the second port T, the third port a, and the fourth port B of the hydraulic valve block 23. The oil tank 10, the hydraulic pump 21, the check valve 241, the three-position four-way electromagnetic directional valve 243, the hydraulic actuator 30, the three-position four-way electromagnetic directional valve 243, and the oil tank 10 form a closed circulation oil path.

In another preferred embodiment, a controller 25 connected to the hydraulic valve assembly 24 is further installed in the housing 21, specifically, a signal output terminal of the sensor 244 (a pressure sensor and a flow sensor) is connected to an input terminal of the controller 25, a first output control terminal of the controller 25 is connected to the hydraulic pump 21, and a second output control terminal of the controller 25 is connected to the three-position four-way electromagnetic directional valve 243. The controller 25 implements construction control of the construction machine and loading, unloading, oil return and other operations of the tensioning system by logically controlling the hydraulic pump 21 and the three-position four-way electromagnetic directional valve 243 according to preset or field input parameters, and is not described in detail herein for the prior art.

This is novel based on closed hydraulic system 20, carries out miniaturization, lightweight, the stabilization to prestressed construction machines and tools and designs, is favorable to overcoming traditional equipment thick, big, stupid, economic nature is poor to and the easy damage scheduling problem of equipment, to improve equipment universality, reduce all can provide beneficial effect in the aspect of site operation intensity of labour etc..

In the description herein, reference to the description of the terms "preferred embodiment," "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like means 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 utility model. In this specification, the schematic representations of the terms used above do not necessarily 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.

While embodiments of the utility model 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 the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The external-hanging type prestress tensioning system comprises an oil tank and a closed hydraulic system which is connected with the oil tank and provides power for a hydraulic actuating element, wherein the oil tank is provided with an oil outlet and an oil return opening; the oil tank is arranged in a split mode with the closed hydraulic system, the oil tank is externally hung on the closed hydraulic system, an oil outlet of the oil tank and an oil return port of the oil tank are connected with hydraulic self-sealing quick connectors which are respectively an oil outlet quick connector and an oil return quick connector, and the oil outlet quick connector and the oil return quick connector can be respectively connected with an oil inlet and an oil return port of the closed hydraulic system in a plug-in mode.

2. The externally-hung type prestress tensioning system of an oil tank as claimed in claim 1, wherein the oil tank is positioned at the top of a closed hydraulic system, and the two hydraulic self-sealing quick connectors are arranged at the bottom of the oil tank.

3. The externally-hung type prestress tensioning system of the oil tank as claimed in claim 2, wherein after the oil tank is connected with the closed type hydraulic system, the hydraulic self-sealing quick connector can be automatically opened under the action of hydraulic oil in the oil tank;

or the hydraulic self-sealing quick connector is integrated with a switch valve.

4. The externally-hung type prestress tensioning system of the oil tank as claimed in claim 1, wherein the oil tank is a closed oil tank, and an energy storage air bag filled with pressure gas is further installed inside the oil tank.

5. The externally hung type prestress tensioning system according to claim 4, wherein the gas filled in the energy storage air bag is inert gas.

6. The externally-hung type prestress tensioning system of the oil tank as claimed in any one of claims 1 to 5, wherein the closed hydraulic system comprises a tank shell, an oil inlet and an oil return port of the closed hydraulic system are both arranged on the tank shell, and a hydraulic pump and a hydraulic valve block integrated with a hydraulic valve group are mounted in the tank shell;

the hydraulic pump is provided with a low-pressure inlet and a high-pressure outlet, and the hydraulic valve block is provided with a first oil port for oil inlet, a second oil port for pressure relief and overflow, and a third oil port and a fourth oil port which are respectively connected with an oil inlet and an oil outlet of the hydraulic actuating piece; the low-pressure inlet of the hydraulic pump is connected with the oil outlet quick-connection interface, the high-pressure outlet of the hydraulic pump is connected with the first oil port of the hydraulic valve block, and the second oil port of the hydraulic valve block is connected with the oil return quick-connection interface.

7. The externally-hung type prestress tensioning system of the oil tank as claimed in claim 6, wherein the hydraulic valve set comprises a three-position four-way electromagnetic directional valve, a pressure sensor for measuring the oil outlet pressure of the hydraulic pump, and a flow sensor for measuring the oil outlet flow of the hydraulic pump, and the three-position four-way electromagnetic directional valve has four ports respectively connected to the first oil port, the second oil port, the third oil port and the fourth oil port of the hydraulic valve block.

8. The externally hung type prestress tensioning system for the oil tank as claimed in claim 7, wherein the hydraulic valve set further comprises a check valve disposed on an oil supply line connecting a high pressure outlet of the hydraulic pump and the first oil port of the hydraulic valve block.

9. The externally hung type prestress tensioning system for the oil tank as claimed in claim 7, wherein the hydraulic valve bank further comprises a high-pressure overflow valve;

the high-pressure overflow valve is arranged on an overload protection pipeline which is connected with a first oil port and a second oil port of the hydraulic valve block, or the high-pressure overflow valve is arranged on an overload protection pipeline which is connected with a high-pressure outlet of the hydraulic pump and the second oil port of the hydraulic valve block.

10. The externally-hung type prestress tensioning system for the oil tank as claimed in claim 6, wherein a controller connected with the hydraulic valve bank is further installed in the tank shell.