CN201145074Y - Pressure release valve with pressure is examined and is known - Google Patents

Abstract

The utility model is a pressure relief valve with pressure detection which combines a pressure relief valve with a pressure switch to have a pressure detection function. When the pressure of hydraulic oil entering the pressure relief valve exceeds a set pressure value, the oil pressure will push an operating rod to move toward an elastic component and simultaneously start a micro switch of a pressure detector to generate a pressure detection function. When oil pressure overload is detected, the operating rod continues to move and simultaneously opens an L-shaped guide hole on the operating rod to communicate with an oil drain port, so that the hydraulic oil is released and the pressure is reduced. After the pressure returns to a stable value, the operating rod returns to its original position and maintains the set pressure.

Description

A pressure relief valve with pressure detection

technical field

The utility model relates to a pressure relief valve with pressure detection.

Background technique

In the prior art, generally speaking, the structure of the punching machine is to use the hydraulic cylinder to drive the punch of the punching machine to move up and down to punch the workpiece. The punching action of the punching machine is to use the hydraulic device to balance and stabilize the pressure. When the load is on or the pressure is insufficient, the limit switch will be activated to urgently control the operation of the machine to protect the mold and punch machine.

The general micro switch device must maintain the pressure balance between the booster pump and the oil chamber body, so the setting position of the micro switch must be quite precise, and the installation is troublesome.

Contents of the invention

In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a pressure relief valve structure with a pressure detection function. When the pressure of hydraulic oil entering the pressure relief valve exceeds the set pressure value, the oil pressure will It will push the action rod to move towards the direction of the elastic component, and at the same time activate the micro switch of the pressure detector to generate the pressure detection function. The hole is connected to the oil drain port to release the hydraulic oil to reduce the pressure; after the pressure returns to a stable value, the actuating rod returns to its original position and maintains the set pressure.

The technical solution adopted by the utility model is: a pressure relief valve with pressure detection, including: a pressure relief valve body and a pressure detector, the pressure relief valve body is provided with an action chamber, a first slot, a second Two slots and side slots, the action chamber is provided with an oil inlet and an oil drain, wherein,

The action chamber of the pressure relief valve body is provided with a bushing, and the bush is provided with a through hole in the axial direction, and an oil guide groove connected to the through hole in the radial direction. Action rod. The shaft of the action rod is accommodated in the connecting channel and runs through the bushing. The end of the shaft of the action rod has an L-shaped guide hole. The other end of the action rod is provided with a pressure plate, which is extended to the side opening At the groove part, an oil inlet valve is fixed in the first slot, and the oil inlet end of the oil inlet valve is provided in the action chamber with an L-shaped through hole for conduction. The hydraulic oil can flow from the oil inlet through the gap to the through hole to the In the action chamber, elastic components and adjusting bolts are arranged in the second slot;

The pressure detector is located in the side slot, which includes a plug and a micro switch.

Wherein, the action chamber communicates with the first slot and the second slot back and forth, and a connecting channel is connected between the action chamber and the second slot.

Wherein, the inside of the second slot of the body communicates with a side slot part provided on the body.

Wherein, there is a gap between the oil inlet end of the oil inlet valve and the action chamber.

The utility model has the following advantages: simple structure, automatic pressure relief and pressurization after the highest set pressure can be realized, and oil pipe bursting can be avoided, and at the same time, the function of protecting the mold and the machine can be realized.

Description of drawings

Fig. 1 is the composite structure schematic diagram of the present utility model;

Fig. 2 is a structural exploded view of the utility model;

Fig. 3 is a schematic diagram of the normal state of the hydraulic pressure of the utility model;

Fig. 4 is a schematic diagram of the hydraulic pressure release state of the utility model.

Explanation of reference signs: 1 body; 11. Action chamber; 111 connecting channel; 112 oil inlet; 113 oil drain; 12 first slot; 13 second slot; 14 side slot; 15 oil inlet valve; 151 Oil inlet end; 152 through hole; 16 bushing; 161 through hole; 162 oil guide groove; 17 action rod; 171L type guide hole; 172 pressure plate; 2 pressure detector; 21 plug; 22 micro switch; 10 leak-proof ring diagram.

Detailed ways

In order to make the technical content and principle used by the utility model easy to understand, the accompanying drawings of specific embodiments are described as follows.

Please refer to Fig. 1, Fig. 2 and Fig. 3, the pressure relief valve with pressure detection of the utility model mainly includes a body 1 and a pressure detector 2, and the pressure relief valve is combined with a pressure switch to have With pressure detection function.

The pressure relief valve body 1 is provided with an action chamber 11, a first slot 12 and a second slot 13, wherein the action chamber 11 communicates with the first slot 12 and the second slot 13 front and back, and the action chamber 11 is connected to the second slot. A connecting channel 111 is connected between the grooves 13 , and an oil inlet 112 and an oil drain 113 are located in the action chamber 11 .

The action chamber 11 of the above-mentioned main body 1 is provided with a bushing 16. The bushing 16 is provided with a through hole 161 in the axial direction, and an oil guide groove 162 connected with the through hole 161 in the radial direction. The bushing 16 is accommodated in the The action chamber 11 is front and back, and the anti-leakage ring 10 is used to implement the leak-proof function; and the action rod 17 is arranged between the second slot 13 and the action chamber 11, and the action rod 17 is accommodated behind the connecting channel 111 with its shaft. Through the through hole 161 provided in the axial direction of the bushing 16, the end of the shaft of the action rod 17 has an L-shaped guide hole 171, and the other end of the action rod 17 is provided with a pressing plate 172 and a pressing portion 173, and the pressing plate 172 is extended To the side slot 14 part.

The first slot 12 is fixedly provided with an oil inlet valve 15, the oil inlet end 151 of the oil inlet valve 15 is arranged in the action chamber 11 and has a through hole 152 in an L shape, and the oil inlet end 151 is connected to the action chamber 11. There is a gap between them, and hydraulic oil can flow from the oil inlet 112 through the gap into the through hole 152 into the working chamber 11 .

The second slot 13 is provided with an elastic assembly 18 and an adjusting bolt 19, wherein the elastic assembly 18 is arranged between the actuating rod 17 and the adjusting bolt 19, and the elastic assembly 18 is provided with a spring seat 181 at the front and back, which facilitates pushing the actuating rod 17 when moving. The elastic component 18 produces a compressive action.

In addition, the side slot 14 is provided with a pressure detector 2, which includes a plug 21 and a micro switch 22. When the operating rod 17 changes due to oil pressure, the operating rod 17 and the micro switch 22 are touched to sense the pressure. Pressure value and provide signal to plug 21 to further control the pressure state.

The operating principle of the pressure relief valve with pressure detection of the utility model is shown in Fig. 3 and Fig. 4. When the hydraulic pressure of the hydraulic oil entering from the oil inlet 112 exceeds the set pressure value, the overload oil Pressing will push the action lever 17 to push it toward the elastic component 18, and the compression of the elastic component 18 will also cause the action lever 17 and the elastic component 18 to move. At this time, the action lever 17 that is in contact with the micro switch 22 also turns on the micro switch 22, and then produce the pressure detection function; and when the oil pressure continues to rise, the moving stroke of the action rod 17 is large, and at this time the L-shaped guide hole 171 set by the action bar 17 passes through the leak-proof ring set in front of the bush 16 10. When the hydraulic oil passes through the L-shaped guide hole 171, the hydraulic oil flows out from the oil drain port 113, and the pressure is released at the same time to protect the oil pipe from bursting; when the pressure drop at the oil inlet 112 is released, the oil pressure is no longer correct. The actuation rod 17 produces a pushing action, and the actuation rod 17 is pushed back by the elastic assembly 18 again at once, and the actuation rod 17 closes the microswitch 22 with its pressing plate 172 .

To sum up, the technical means disclosed in the utility model can indeed achieve the expected purpose and effect and has long-term progress. Above is only the preferred embodiment of the present utility model, when can not limit the scope that the present utility model is implemented with this, promptly all equivalent changes and modifications done according to the patent scope of the utility model and the content of the creation manual should still belong to this utility model. within the scope of utility model patents.

Claims (4)

1, the Decompression valves that detects of a kind of tool pressure, comprising: Decompression valves body and pressure detector is characterized in that: described Decompression valves body is provided with application chamber, first fluting, second fluting and side fluting, and described application chamber is provided with oiler and drain tap, wherein,

Be provided with lining in the application chamber of described Decompression valves body, this lining is axially arranged with perforation, radially be provided with the oily guide groove of connection at perforation, slot by second and to be provided with actuating strut between the application chamber, this actuating strut is contained in to connect with its shaft and is applied in behind the channel among the lining, actuating strut shaft end has a L type guide hole, actuating strut end in addition is provided with pressing plate, this pressing plate extension is arranged to side slotted section place, the first fluting internal fixation is provided with into fuel tap, the oil-inlet end of going into fuel tap is located at has the through hole that is the conducting of L shape in the application chamber, hydraulic oil can flow into through hole to application chamber through the gap by oiler, is provided with elastic component in second fluting and adjusts bolt;

The pressure detector is located at the side fluting, and it comprises plug and sensitive switch.

2, the Decompression valves that detects of tool pressure according to claim 1 is characterized in that: be communicated with before and after the described application chamber at first fluting and second fluting, application chamber is connected with channel between slotting with second.

3, the Decompression valves that detects of tool pressure according to claim 1 is characterized in that: second fluting of described body is inner to be communicated with a side slotted section that is located at body.

4, the Decompression valves that detects of tool pressure according to claim 1 is characterized in that: be provided with the gap between in described oil-inlet end of going into fuel tap and the application chamber.

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