CN204422315U - A kind of additional locking devices for valve pressure test - Google Patents

Abstract

The utility model relates to the technical field of mechanical connection devices, in particular to an auxiliary locking device for valve pressure tests, including a pressure tester, on which a connection plate is connected, and the connection plate and the sealing plate are fixedly connected by screws. A pressure hole is provided between the connecting plate and the sealing plate. Compared with the prior art, the utility model has the advantage that the connecting plate of the utility model is connected with the pressure tester, the sealing plate is connected with the connecting plate, and a pressure hole is processed between the sealing plate and the connecting plate, so as to ensure the The pressure balance between the connection plate and the sealing plate does not require additional locking force from the oil cylinder, ensuring the safety of the valve during the pressure test.

Description

Auxiliary locking device for valve pressure test

[technical field]

The utility model relates to the technical field of mechanical connection devices, in particular to an auxiliary locking device for valve pressure tests.

[Background technique]

With the improvement of the design and process level of natural gas, petroleum, chemical, environmental protection and other transmission pipelines and steam storage devices, the use of high-pressure large-diameter valves is increasing year by year, and the sales of high-pressure large-diameter valves for valve manufacturers are increasing. , production have put forward new requirements.

Before the valve is put into operation, it needs to carry out strict pressure test in the pressure test device. The purpose of the pressure test is to check the strength and tightness of the pressure-bearing parts of the pressure vessel. During the test, by observing whether the pressure-bearing parts have obvious deformation or rupture, it is verified whether the pressure vessel has the pressure-bearing capacity necessary for safe operation under the design pressure. At the same time, check the tightness of the pressure vessel by observing whether there is leakage at the joints such as welds and flanges. During the pressure test of high-pressure large-diameter valves, because the test pressure of the shell strength is 1.5 times the design pressure of the valve, when the valve is subjected to the shell test, when the sealing cover of the test press reaches the high-pressure part, the two ends of the test press are sealed. Under the action of the total force, the cover will increase the load of the locking cylinder of the press test machine, resulting in insufficient locking force of the cylinder, causing the sealing cover of the valve to detach during the pressure test, and the dangerous situation of high-pressure test medium ejection occurs.

[utility model content]

The purpose of this utility model is to solve the deficiencies and defects of the valve pressure test device in the prior art that are prone to dangerous situations such as the sealing cover detaching during the test process, and to provide a novel structure, safe and reliable, and can effectively lock the pressure test auxiliary valve. The auxiliary locking device for the valve pressure test of the device includes a pressure test machine, a connection plate is connected to the pressure test machine, the connection plate and the sealing plate are fixedly connected by screws, and there is a passage between the connection plate and the sealing plate Pressure hole.

Two grooves are respectively arranged on the upper surface and the lower surface of the sealing disk, and a sealing ring is arranged in the groove, and a fixing hole is also arranged on the sealing disk.

The sealing ring is a rubber O-ring.

The connecting disk includes a disk body, the center of the disk body is provided with a shaft hole and is connected to the testing machine through the shaft hole, and a fixing hole is arranged around the disk body, and the position of the fixing hole is connected with the fixing hole on the sealing disk. corresponding to the hole position.

Several sets of corresponding grooves and protrusions are respectively provided on the connection end surfaces of the connection plate and the sealing plate, and the protrusions and the grooves are engaged with each other and connected by screws during connection.

There are 47 sets of corresponding grooves and protrusions on the connecting end surface of the sealing disc.

Compared with the prior art, the utility model has the advantage that the connecting plate of the utility model is connected with the pressure tester, the sealing plate is connected with the connecting plate, and a pressure hole is processed between the sealing plate and the connecting plate, so as to ensure the The pressure balance between the connection plate and the sealing plate does not require additional locking force from the oil cylinder, ensuring the safety of the valve during the pressure test.

[Description of drawings]

Fig. 1 is a structural schematic diagram of an auxiliary locking device for a pressure test according to an embodiment of the utility model;

Fig. 2 is a schematic structural diagram of the working state of the pressure test auxiliary device of the embodiment of the present invention applied to the pressure test device;

As shown in the figure, in the figure: 1. Connecting disc 2. Sealing disc 3. Sealing ring 4. Connecting screw;

Designated Fig. 2 is the abstract accompanying drawing of the utility model.

[Detailed ways]

Below in conjunction with accompanying drawing, the utility model is further described, and the structure and principle of this device are very clear to those skilled in the art. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1 and Figure 2, a pressure test auxiliary device includes a connecting plate and a sealing plate, which are connected by screws, with a sealing ring between them to ensure sealing, and a pressure hole is processed between the connecting plate and the sealing plate to ensure When the device is working, the pressure is balanced to avoid accidents.

When in use, first connect the connection plate to the pressure tester, install it correspondingly with the pressure tester through the shaft hole of the connection plate, and then carry out the sealing connection through the sealing plate. The upper surface and the lower surface of the sealing disc are respectively provided with two grooves, and a sealing ring is arranged in the groove, and the sealing ring is preferably a rubber O-ring. Several groups of corresponding grooves and protrusions are respectively provided on the connecting end faces of the connection plate and the sealing plate, preferably 4 to 7 groups, and the protrusions and grooves are engaged with each other and connected by screws during connection.

When the test press is tested, it is sealed through the cooperation of the connecting plate and the sealing plate. When the seal cover of the test press reaches the high pressure part, the seal covers at both ends of the test press will increase the test pressure under the action of the total force. The load of the machine locks the oil cylinder, and the locking force of the oil cylinder ensures the locking degree under the cooperation of the device of the utility model, so that the valve is guaranteed to be sealed during the pressure test process, and there will be no dangerous situation of high-pressure test medium ejection, which is safe and reliable. .

Claims (6)

1. An auxiliary locking device for a valve pressure test, comprising a pressure tester, characterized in that a connection plate is connected to the pressure tester, the connection plate and the sealing plate are fixedly connected by screws, and the connection plate There is a pressure hole between the seal plate and the seal plate. 2. An auxiliary locking device for valve pressure test as claimed in claim 1, characterized in that two grooves are respectively provided on the upper surface and the lower surface of the sealing disc, and a seal is arranged in the groove. ring, and the sealing disc is also provided with fixing holes. 3. The auxiliary locking device for valve pressure test according to claim 2, characterized in that said sealing ring is a rubber O-ring. 4. A kind of auxiliary locking device for valve pressure test as claimed in claim 1, it is characterized in that said connecting plate comprises a disc body, and the center of said disc body is provided with a shaft hole and passes through the shaft hole and the test The machine is connected with the phase, and there are fixing holes around the disc body, and the positions of the fixing holes correspond to the positions of the fixing holes on the sealing disc. 5. An auxiliary locking device for valve pressure test as claimed in claim 1, characterized in that several groups of corresponding grooves and bumps are respectively provided on the connection end faces of the connection plate and the sealing plate, and the connection When the protrusions and grooves are engaged and connected by screws. 6. The auxiliary locking device for valve pressure test according to claim 5, characterized in that 4-7 sets of corresponding grooves and protrusions are provided on the connecting end surface of the sealing disc.