CN219120350U

CN219120350U - Bypass relief valve

Info

Publication number: CN219120350U
Application number: CN202222884841.6U
Authority: CN
Inventors: 杨杰; 李子光; 王占平; 徐智; 张利雄; 刘诚; 李志成
Original assignee: Huaneng Lancang River Hydropower Co Ltd
Current assignee: Huaneng Lancang River Hydropower Co Ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-06-02
Anticipated expiration: 2032-10-31

Abstract

The utility model provides a bypass pressure relief valve, which comprises a high-pressure pump, a water inlet pipe connected with the input end of the high-pressure pump and a water outlet pipe connected with the output end of the high-pressure pump, and is characterized in that the water outlet pipe is provided with a bypass pressure relief valve on which a bypass pressure relief pipe is arranged, and an adjustable valve plate which is respectively connected with the bypass pressure relief pipe and the water outlet pipe in a matched and closed way is arranged in the bypass pressure relief valve. When the high-pressure pump is abnormally stopped, the water outlet pipe is closed through the adjustable valve plate, the bypass pressure relief pipe is opened, water with impact force is discharged and relieved through the bypass pressure relief pipe, and when the high-pressure pump is in normal operation, the water outlet pipe is opened through the adjustable valve plate, and the bypass pressure relief pipe is closed, so that the water flow is in normal operation. The whole device can be switched by using or not using extra power, so that the safety of the whole pipeline and equipment is effectively protected.

Description

Bypass relief valve

Technical Field

The utility model relates to a pressure relief valve, in particular to a bypass pressure relief valve, and belongs to the technical field of valve design and manufacturing.

Background

When the large-caliber high-pressure pump is operated and lifted, once internal mechanical faults or external reasons are met and the power is cut off and the high-pressure pump is stopped, water in the lifting water pipe can form a water hammer due to backwater and generate larger impact force, the heavy shock of the pipeline is caused by light weight, the pipeline support and hanger is damaged, the pipeline elbow welding port is pulled and broken, and even the valve, the water pump and the like are damaged due to the impact of the water, so that equipment accidents are caused. There is therefore a need for improvements in the art.

Disclosure of Invention

The utility model provides a bypass pressure relief valve, which aims to solve the problems that water impact is generated in the existing pipeline due to equipment failure to damage the pipeline and equipment and the like.

The utility model is completed by the following technical scheme: the utility model provides a bypass relief valve, including the high-pressure pump, the inlet tube that links to each other with the high-pressure pump input, and the outlet pipe that links to each other with the high-pressure pump output, be equipped with the bypass relief valve of establishing the bypass relief pipe on it on the outlet pipe, be equipped with in the bypass relief valve respectively with bypass relief pipe and outlet pipe match and connect and confined adjustable valve plate, so that when the high-pressure pump appears unusual shut down, close the outlet pipe and open the bypass relief pipe through adjustable valve plate, make the rivers of taking the impact force discharge pressure release through the bypass relief pipe, open the outlet pipe and close the bypass relief pipe through adjustable valve plate when the high-pressure pump normally operates, thereby make rivers normal operating.

The bypass relief valve is set to the three-way valve of the valve pocket of establishing in it, and this three-way valve includes the valve pocket in it, upper joint, the lower joint of communicating with the valve pocket to and the side joint of locating between upper and lower joint horizontally, wherein: the lower joint is connected with the output end of the high-pressure pump, the upper joint is connected with the water outlet end of the high-pressure pump, the side joint is connected with the bypass pressure relief, the valve cavity is arranged in the center of the three-way valve, the adjustable valve plate is hinged in the joint junction in the valve cavity through the rotating shaft, one end of the rotating shaft penetrates through the valve wall and is connected with an external power motor so as to drive the rotating shaft and the adjustable valve plate connected with the rotating shaft to swing between the joints under the drive of the power motor, and the two joints are alternately opened and closed, namely, water flows from bottom to top when the high-pressure pump is in normal operation, and at the moment, the water flows upwards jack the adjustable valve plate to seal the side joint, so that the water is normally sent out through the water outlet pipe; when the high-pressure pump is stopped due to reasons, the adjustable valve plate falls down to seal the lower joint, so that the water with impact force is discharged and decompressed through the bypass decompression pipe.

The surfaces of the adjustable valve plate, which are contacted with the side joint, are all inner inclined surfaces which incline towards the inside of the cavity, so that the gravity center of the adjustable valve plate deviates towards the cavity when the adjustable valve plate is matched with the side joint, and when the high-pressure pump stops running and water flow is cut off, the adjustable valve plate automatically falls under the action of dead weight due to the loss of water flow support, and the lower joint is closed; when the high-pressure pump resumes work, open adjustable valve plate under the effect of rivers from bottom to top, seal the side joint simultaneously, need not the switching of extra power control adjustable valve plate.

And a pressure gauge is arranged on the water outlet pipe.

The utility model has the following advantages and effects: by adopting the scheme, when the high-pressure pump is abnormally stopped, the water outlet pipe is conveniently closed through the adjustable valve plate, the bypass pressure relief pipe is opened, water with impact force is discharged and decompressed through the bypass pressure relief pipe, and when the high-pressure pump is in normal operation, the water outlet pipe is opened through the adjustable valve plate, and the bypass pressure relief pipe is closed, so that the water flow is in normal operation. The whole device can be switched by using or not using extra power, so that the safety of the whole pipeline and equipment is effectively protected. Is an ideal pressure relief valve.

Drawings

FIG. 1 is a block diagram of the present utility model;

FIG. 2 is a diagram of the bypass relief valve in its normal state;

fig. 3 is a view showing a structure of a pressure release state of the bypass pressure release valve.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The bypass pressure relief valve provided by the utility model comprises a high-pressure pump 2, a water inlet pipe 1 connected with the input end of the high-pressure pump 2, and a water outlet pipe 5 connected with the output end of the high-pressure pump 2, wherein a bypass pressure relief valve 4 on which a bypass pressure relief pipe 6 is arranged on the water outlet pipe 5, and an adjustable valve plate 10 which is respectively matched with and sealed with the bypass pressure relief pipe 6 and the water outlet pipe 5 is arranged in the bypass pressure relief valve 4, so that when the high-pressure pump 2 is abnormally stopped, the water outlet pipe 5 is closed and the bypass pressure relief pipe 6 is opened through the adjustable valve plate 10, and water with impact force is discharged and decompressed through the bypass pressure relief pipe 6 as shown in figures 1 and 3; when the high-pressure pump 2 operates normally, the water outlet pipe 5 is opened through the adjustable valve plate 10, and the bypass pressure relief pipe 6 is closed, as shown in fig. 1 and 2, so that water is normally sent out through the water outlet pipe 5;

the bypass relief valve 4 is provided with a three-way valve with a valve cavity 9 inside, the three-way valve comprises the valve cavity 9 inside, an upper joint 11 and a lower joint 7 which are communicated with the valve cavity, and a side joint 12 horizontally arranged between the upper joint and the lower joint, wherein: the lower joint 7 is connected with the output end of the high-pressure pump 2, the upper joint 11 is connected with the water outlet pipe 5 of the high-pressure pump 2, the side joint 12 is connected with the bypass pressure relief pipe 6, the valve cavity 9 is arranged in the center of the three-way valve, the adjustable valve plate 10 is hinged in the

joint

7 and 12 in the valve cavity 9 through the rotating shaft 8, one end of the rotating shaft 8 penetrates through the valve wall and is connected with an external power motor (not shown in the figure) so as to drive the rotating shaft 8 and the adjustable valve plate 10 connected with the rotating shaft 8 to swing between the

joints

7 and 12 under the driving of the power motor, and the alternate opening and closing of the two

joints

7 and 12 are completed; so that the water flow flows from bottom to top when the high-pressure pump 2 is in normal operation, and the water flow upwards jacks the adjustable valve plate 10 to seal the side joint 12, so that the water flow is normally sent out through the water outlet pipe 5; when the high-pressure pump 2 is stopped due to reasons, the adjustable valve plate 10 falls to seal the lower joint 7, so that the water with impact force is discharged and decompressed through the bypass decompression pipe 6;

the surface of the adjustable valve plate 10, which is contacted with the side joint 12, is set to be an inward inclined surface inclined towards the inside of the cavity 9, so that the gravity center of the adjustable valve plate 10 is deviated towards the cavity when the adjustable valve plate 10 is matched with the side joint 12, and when the high-pressure pump 2 stops running and water flow is cut off, the adjustable valve plate 10 automatically falls under the action of dead weight due to the loss of water flow support, and the lower interface 7 is closed; when the high-pressure pump 2 resumes operation, the side joint 12 is closed while the adjustable valve plate 10 is opened by the water flow from bottom to top, and no additional power is required to control the opening or closing of the adjustable valve plate 10.

The water outlet pipe 7 is provided with a pressure gauge 3.

Claims

1. The bypass pressure relief valve comprises a high-pressure pump, a water inlet pipe connected with the input end of the high-pressure pump and a water outlet pipe connected with the output end of the high-pressure pump, and is characterized in that a bypass pressure relief valve with a bypass pressure relief pipe is arranged on the water outlet pipe, and an adjustable valve plate which is respectively connected with the bypass pressure relief pipe and the water outlet pipe in a matched mode and is closed is arranged in the bypass pressure relief valve.

2. The bypass relief valve of claim 1, wherein the bypass relief valve is provided as a three-way valve having a valve chamber therein, the three-way valve comprising a valve chamber therein, an upper connector in communication with the valve chamber, a lower connector, and a side connector disposed horizontally between the upper and lower connectors, wherein: the lower joint is connected with the output end of the high-pressure pump, the upper joint is connected with the water outlet of the high-pressure pump, the side joint is connected with bypass pressure relief, the valve cavity is arranged in the center of the three-way valve, the adjustable valve plate is hinged to the joint junction in the valve cavity through a rotating shaft, and one end of the rotating shaft penetrates through the valve wall and is connected with an external power motor.

3. The bypass relief valve as claimed in claim 1 wherein the surfaces of the adjustable valve plate that contact the side fittings are each provided as an inwardly sloped surface sloped into the cavity such that the center of gravity of the adjustable valve plate is offset toward the cavity when the adjustable valve plate is mated with the side fittings.

4. The bypass relief valve of claim 1 wherein said outlet pipe is provided with a pressure gauge.