CN201706054U - Screw pump front automatic air release valve - Google Patents

Abstract

The automatic air release valve before the screw pump is applied to the crude oil gathering and transportation pipeline in oil field. A floating valve core is arranged in the valve body, the floating valve core is cylindrical, the inside of the floating valve core is sealed hollow, and a cone is arranged at the center of the top of the floating valve core. An upper gland is fixed on the upper part of the valve body and provided with a central hole, and a joint is arranged at the outer end of the upper gland. The upper end of the cone of the floating valve core can be inserted into the central hole of the upper gland and close the oil channel. The effect is as follows: when the screw pump operates, gas in the oil pipeline can be discharged through the automatic air discharge valve, and when the pump stops operating, the valve core in the air discharge valve closes the air discharge duct, so that liquid is prevented from flowing out, and normal operation of unattended equipment is ensured; the working strength of operators is reduced, and the working efficiency is improved.

Description

Screw pump front automatic air release valve

technical field

The utility model relates to a crude oil gathering and transportation pipeline in oil field development and production, in particular to an automatic gas discharge valve in the crude oil gathering and transportation pipeline. the

Background technique

In the process of oilfield development and production, screw pumps are often used as power pressurization equipment for crude oil gathering and transportation. When the screw pump is in use, the gas in the conveying medium will produce an air lock phenomenon on the pump, which will reduce the efficiency of the screw pump. In severe cases, the screw pump will vibrate violently during operation, which will easily cause damage to the screw pump and its accessories. At present, the way to solve the gas discharge in the pipeline is: during the operation of the screw pump, the worker opens the manual air release valve arranged on the pipeline in front of the screw pump to realize the discharge of gas. To reduce the impact of gas on the screw pump, the vent valve must be closed when the screw pump is stopped to prevent the mixture in the pump from flowing out and causing pollution. the

Utility model content

The purpose of this utility model is: to provide an automatic air release valve in front of the screw pump, which is installed on the oil pipeline. When the screw pump is running, the gas in the oil pipeline can be automatically discharged through the automatic air release valve; The inner spool of the gas valve closes the exhaust channel to prevent the liquid from flowing out, so that the unattended equipment can operate normally. the

The technical solution adopted by the utility model is: the automatic air release valve in front of the screw pump mainly consists of an upper gland and a floating valve core valve body, the valve body is cylindrical with a bottom, and there is a connecting joint outside the bottom of the valve body Can be fixed on the oil pipeline. The connecting joint has a central hole, and is characterized in that: there is a floating spool in the valve body, the floating spool is cylindrical, the inside of the floating spool is airtight and hollow, and there is a cone at the center of the top of the floating spool. An upper gland is fixed on the top of the valve body, the upper gland has a central hole, and the outer end of the upper gland has a joint, which can be connected to the valve. The upper end of the cone of the floating spool can be inserted into the central hole of the upper gland and close the oil passage. the

The floating spool is made of PTFE. the

The top of the floating spool cone is spherical. the

Briefly describe the working principle of the automatic air release valve before the screw pump. See Figure 2. A filter 5 is connected to the oil delivery pipeline 4, a joint is welded on the downstream pipeline of the filter 5, and an automatic air release valve 6 before the screw pump is installed on the joint. A manual valve 7 is connected to the upper end of the automatic deflation valve 6 in front of the screw pump. During the infusion process of the screw pump, after the gas-liquid mixture passes through the filter 5, the internal gas escapes and enters the valve body 3. The gas passes through the annular space between the floating valve core 2 and the valve body 3, enters the valve 7 from the upper gland 1, and is discharged from the valve 7. When the screw pump stops working, the pressure in the oil pipeline 4 rises, and the mixed liquid enters the valve body 3 . The floating spool 2 rises to block the center hole of the upper gland 1 and block the air release channel, so as to realize the purpose of air release without liquid discharge during the whole process of equipment operation. the

Beneficial effects of the utility model: the automatic air release valve in front of the screw pump of the utility model, when the screw pump is running, the gas in the oil pipeline will be discharged through the automatic air release valve, and the valve core in the air release valve will be closed when the pump is out of operation The exhaust hole prevents the liquid from flowing out, ensuring the normal operation of the equipment when unattended; reducing the work intensity of the operator and improving work efficiency. the

Description of drawings

Figure 1 is a schematic cross-sectional view of the structure of the automatic air release valve in front of the screw pump of the present invention. the

Figure 2 is a schematic diagram of the installation and use of the automatic air release valve in front of the screw pump of the present invention. the

In the figure, 1. Upper gland, 2. Floating spool, 3. Valve body, 4. Oil pipeline, 5. Filter, 6. Automatic air release valve in front of screw pump, 7. Valve. the

Detailed ways

Embodiment 1: Taking the automatic air release valve before a screw pump pump as an example, the utility model is described in further detail. the

See Figure 1. The automatic venting valve before the screw pump of the utility model is mainly composed of an upper gland 1, a floating valve core 2 and a valve body 3. The valve body 3 is cylindrical with a bottom, and the inner diameter of the valve body 3 is 50 mm. There are connecting joints outside the bottom of the valve body 3 . The connecting nipple has a central hole. There is a floating spool 2 in the valve body 3, the floating spool 2 is cylindrical, and the outer diameter of the floating spool 2 is 48 mm. The inside of the floating spool 2 is airtight and hollow, and the floating spool 2 is made of polytetrafluoroethylene. There is a cone at the top center of the floating spool 2. An upper gland 1 is fixed on the top of the valve body 3, the upper gland 1 has a central hole, and the outer end of the upper gland 1 has a joint. The upper end of the cone of the floating spool 2 can be inserted into the central hole of the upper gland 1 and close the oil passage. the

Claims (3)

1. valve air relief before the screw pump pump, mainly form by upper press cover (1), floating plug (2) and valve body (3), valve body (3) is for there being the cylindrical shape at the end, in valve body (3) outside, the end jointing is arranged, jointing has center hole, it is characterized in that: a floating plug (2) is arranged in valve body (3), and floating plug (2) is the cylinder bodily form, floating plug (2) inside is airtight hollow shape, in the top center of floating plug (2) cone is arranged; Be fixed with upper press cover (1) on the top of valve body (3), upper press cover (1) has center hole, and there is joint the outer end of upper press cover (1), and the cone upper end portion of floating plug (2) can be inserted the center hole of upper press cover (1) and be closed oily passage.

2. valve air relief before the screw pump pump according to claim 1, it is characterized in that: floating plug (2) is made by teflon.

3. valve air relief before the screw pump pump according to claim 1, it is characterized in that: the top of described floating plug (2) cone is a sphere shape.

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