CN216975361U

CN216975361U - Accumulator safety valve

Info

Publication number: CN216975361U
Application number: CN202220726157.2U
Authority: CN
Inventors: 张羊; 侯少帅; 曹小桥
Original assignee: Shanghai Shengkesisi Hydraulic Co ltd
Current assignee: Shanghai Shengkesisi Hydraulic Co ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-07-15
Anticipated expiration: 2032-03-28

Abstract

The utility model provides an accumulator safety valve, comprising: the valve comprises a manifold block, a first stop valve and a second stop valve. The integrated block is provided with an oil inlet, a working oil port, an oil unloading port, a first mounting port and a second mounting port, and the oil inlet is connected with the working oil port and the oil unloading port through internal pore channels. The first stop valve is installed in the first installation opening, the first stop valve is connected between the oil inlet and the working oil port, and the first stop valve is in a normally open state. The first stop valve is installed in the first installation opening, the second stop valve is connected between the oil inlet and the oil discharge opening, and the first stop valve is in a normally closed state. The device can not only realize the connection and disconnection of the energy accumulator, but also realize the rapid pressure relief of the energy accumulator, thereby ensuring the safety of the energy accumulator during working and being convenient for the pressure relief maintenance of the energy accumulator.

Description

Accumulator safety valve

Technical Field

The utility model relates to an accumulator safety valve.

Background

Accumulators are one of the important components of hydraulic systems. In a hydraulic system, the functions of an accumulator are mainly classified into four categories, i.e., energy storage, hydraulic shock absorption, pulsation elimination, and energy recovery. The function is detailed as follows:

the first type: energy is stored. This kind of function can be subdivided into the following in practical use: firstly, the power is used as an auxiliary power source to reduce the installed capacity; compensating leakage; thirdly, thermal expansion compensation is carried out; fourthly, the power source is taken as an emergency power source; form a constant pressure oil source.

The second type: absorbing hydraulic shock. Sudden reversal of the reversing valve and sudden stopping of the actuator movement can generate pressure shock in the hydraulic system, which can cause the system pressure to rise rapidly in a short time, causing damage to instruments, components and sealing devices, and generating vibration and noise. To ensure the absorption effect, the accumulator should be arranged near the impact point, so the accumulator is generally arranged in front of the impact source such as a control valve or a hydraulic cylinder, and the like, and can well absorb and buffer the hydraulic impact.

In the third category: eliminating pulsation and reducing noise. For hydraulic systems that employ plunger pumps with a low number of plungers, the periodic variation of the pump flow causes the system to vibrate. The accumulator is arranged to absorb a large amount of energy in pulsating pressure and flow within one period of flow pulsation. The part of oil liquid with the instantaneous flow higher than the average flow is absorbed by the energy accumulator, and the part of oil liquid with the instantaneous flow lower than the average flow is supplemented by the energy accumulator, so that the energy in the pulsation is absorbed, the pulsation is reduced, and the damage degree to sensitive instruments and equipment is reduced.

The fourth type: and recovering energy. Energy recovery with accumulators is an area of intense research. Energy recovery can improve energy utilization rate, and is an important way for energy conservation. The energy accumulator can temporarily store energy, so that the energy accumulator can be used for recovering potential energy with multiple functions and positions. The main studies in this regard are: firstly, recovering vehicle braking energy; recovering potential energy of the engineering mechanical movable arm mechanism; thirdly, recovering braking energy of the rotary table of the hydraulic excavator; recovering the falling gravitational potential energy of the petroleum workover rig and the drill pipe; fifth, recovering the descending gravitational potential energy of the elevator.

Accumulators are hazardous components in hydraulic systems, so particular attention must be paid to safety during operation, and safety must be ensured during failure diagnosis, removal and maintenance of the accumulators. The common mode at present is to connect a stop valve at the connection port of the accumulator, so as to close or open the accumulator in time. However, this method cannot ensure safety well and cannot meet daily requirements for maintenance and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect that the safety of an energy accumulator in the prior art cannot be effectively ensured, and provides an energy accumulator safety valve capable of solving the problem.

The utility model solves the technical problems through the following technical scheme:

an accumulator relief valve characterized in that it comprises:

the integrated block is provided with an oil inlet, a working oil port, an oil discharge port, a first mounting port and a second mounting port, and the oil inlet is connected with the working oil port and the oil discharge port through internal pore passages;

the first stop valve is arranged in the first installation opening, connected between the oil inlet and the working oil port and in a normally open state;

the second stop valve is installed in the second installation opening, connected between the oil inlet and the oil unloading opening and in a normally-closed state.

Preferably, the accumulator safety valve further comprises an overflow valve, a third mounting hole is formed in the manifold block, the overflow valve is mounted at the third mounting hole, and the overflow valve and the second stop valve are connected in parallel between the oil inlet and the oil outlet.

Preferably, the manifold block is provided with a pressure measuring port, and the pressure measuring port is communicated with the oil inlet.

Preferably, the manifold block has a mounting hole therethrough for fixing the manifold block to an external facility.

Preferably, the first mounting port has internal threads, and the first shut-off valve is threadedly coupled to the first mounting port.

Preferably, the second mounting port has internal threads, and the second shut-off valve is threadably connected to the second mounting port.

Preferably, the third mounting port has internal threads, and the relief valve is threadedly connected to the third mounting port.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the utility model.

The positive progress effects of the utility model are as follows: the device can not only realize the connection and disconnection of the energy accumulator, but also realize the rapid pressure relief of the energy accumulator, thereby ensuring the safety of the energy accumulator during working and being convenient for the pressure relief maintenance of the energy accumulator.

Drawings

Fig. 1 is a schematic diagram of an explosive structure of an accumulator relief valve in a preferred embodiment of the utility model.

Fig. 2 is a bottom view of an accumulator relief valve in a preferred embodiment of the utility model.

Fig. 3 is a hydraulic schematic of an accumulator relief valve in a preferred embodiment of the utility model.

Description of reference numerals:

integrated block 100

Oil inlet 110

Working oil port 120

Oil discharge port 130

Second mounting opening 140

Third mounting opening 150

Pressure measuring port 160

Mounting hole 170

First stop valve 200

Second stop valve 300

Relief valve 400

Detailed Description

The present invention will be more clearly and completely described in the following description of preferred embodiments, taken in conjunction with the accompanying drawings.

Fig. 1-3 show an accumulator relief valve comprising: a manifold 100, a first shut-off valve 200, and a second shut-off valve 300. The manifold block 100 is provided with an oil inlet 110, a working oil port 120, an oil discharge port 130, a first mounting port (not shown) and a second mounting port 140, wherein the oil inlet 110 is connected with the working oil port 120 and the oil discharge port 130 through internal channels. The first check valve 200 is installed in the first installation port, the first check valve 200 is connected between the oil inlet 110 and the working oil port 120, and the first check valve 200 is in a normally open state. The second cut-off valve 300 is installed in the second installation port 140, the second cut-off valve 300 is connected between the oil inlet 110 and the oil discharge port 130, and the second cut-off valve 300 is in a normally closed state.

When the device is used, the opening of the energy accumulator is connected with the oil inlet 110 of the safety valve through a pipeline, the working oil port 120 of the safety valve is connected with a working pipeline, and the oil discharge port 130 is connected with an oil tank through a pipeline. In daily work, the first stop valve 200 is normally open, and the second stop valve 300 is normally closed. If the working pipeline has a fault and causes the pipeline to be blocked, closing the first stop valve 200; if the pressure of the energy accumulator is overlarge, the second stop valve 300 is opened to release the pressure in time; when the accumulator needs to be overhauled, the first stop valve 200 is closed, the second stop valve 300 is opened, and all hydraulic oil in the accumulator is drained.

The top ends of the first stop valve 200 and the second stop valve 300 are provided with adjusting control value knobs, and the operation is very convenient. The first and

second cutoff valves

200 and 300 are manually operated to open or close the oil storage capacity of the accumulator, facilitating the repair and replacement of the accumulator.

During daily work, in order to detect the oil pressure condition of the accumulator and timely relieve the pressure, the accumulator safety valve further comprises an overflow valve 400, a third mounting hole 150 is formed in the manifold block 100, the overflow valve 400 is mounted at the third mounting hole 150, and the overflow valve 400 and the second stop valve 300 are connected between the oil inlet 110 and the oil discharge hole 130 in parallel. When the pressure value in the accumulator is higher than the set pressure value of the relief valve 400, the pressure oil in the accumulator overflows from the first relief valve 400. When the pressure value in the accumulator is lower than the set pressure value of the overflow valve 400, the overflow valve 400 is closed immediately, and the pressure oil in the accumulator cannot overflow from the overflow valve 400 any more. The relief valve 400 is used to protect the accumulator and prevent the accumulator from being damaged due to pressure overload.

In this embodiment, the integrated package 100 has a pressure measuring port 160, and the pressure measuring port 160 is communicated with the oil inlet 110. The pressure measuring port 160 is used for installing a pressure measuring meter, so that the internal working pressure of the energy accumulator can be monitored in time, and the energy accumulator is prevented from being damaged due to pressure overload.

The manifold block 100 has a mounting hole 170 therethrough, and the mounting hole 170 is used to fix the manifold block 100 to an external facility.

In order to facilitate the installation of the first stop valve 200, the second stop valve 300 and the overflow valve 400 on the manifold block 100 and ensure the sealing connection, the first mounting port, the second mounting port 140 and the third mounting port 150 are internally provided with internal threads, and the first stop valve 200, the second stop valve 300 and the overflow valve 400 are in threaded connection with the first mounting port, the second mounting port 140 and the third mounting port 150.

In the scheme, the integrated block 100 is a cuboid component, has compact design and convenient operation, and can also be developed towards a standardized series direction. The manifold block 100 can be made of materials selected according to actual working pressure, such as aluminum alloy, nodular cast iron QT450 and the like. The pore processing with the required control function is realized through a certain design and processing mode.

While specific embodiments of the utility model have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the utility model is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the utility model, and these changes and modifications are within the scope of the utility model.

Claims

1. An accumulator relief valve, comprising:

2. The accumulator safety valve of claim 1, further comprising an overflow valve, the manifold block having a third mounting port, the overflow valve being mounted to the third mounting port, the overflow valve and the second stop valve being connected in parallel between the oil inlet and the oil discharge port.

3. The accumulator relief valve of claim 2, wherein the manifold block has a pressure tap therein, the pressure tap communicating with the oil inlet.

4. The accumulator relief valve of claim 3, wherein the manifold has a mounting hole therethrough for securing the manifold to an external facility.

5. The accumulator relief valve of claim 4, wherein the first mounting port has internal threads and the first shut-off valve is threadably connected to the first mounting port.

6. The accumulator relief valve of claim 4, wherein the second mounting port has internal threads and the second shut-off valve is threadably connected to the second mounting port.

7. The accumulator relief valve of claim 4, wherein the third mounting port has internal threads and the relief valve is threadably connected to the third mounting port.