RU2191308C2 - Device for control of pressure differential - Google Patents

Abstract

FIELD: gas and oil producing industry; control of level in separation reservoirs; shut-off units in production lines for forming preset pressure differential. SUBSTANCE: proposed device has body with opening which may be shut-off, cover, gate valve with throughway hole which is located between body and cover, sealing members and lever acting on gate valve through shaft. Gate valve is provided with hole in form of loop with concave side. Concavity of this side corresponds to profile of passage area of hole to be shut-off. EFFECT: enhanced operational efficiency; increased service life due to reduced wear of sealing elements. 2 dwg

Description

 The invention relates to devices for regulating the differential pressure and can be used in the oil and gas industry to control the level in separation tanks, as well as a locking device on production lines to create a given differential pressure.

 Known regulating damper (IPC 20.00.00.000, TU 4315-002-33981243-96), containing a steel cylindrical body, on the surface of which are two diametrically opposite holes for the shaft, on which an eccentric mounted fixedly by a wedge is mounted. The eccentric is in direct contact with the damper. The rotation of the shaft, and therefore the eccentric, affects the damper and sets the position open or closed.

 A disadvantage of the known device is the inability to control the pressure drop at high gas flow rates due to incomplete opening of the passage opening section.

 The closest technical solution to the claimed invention is a device (DE 3538404 A1, 04/30/1987, F 16 K 3/06), comprising a housing with a blocked opening, a cover, a gate with a through hole located between the housing and the cover, sealing elements, a lever, acting on the gate through the roller.

 A disadvantage of the known device is the slow opening of the bore, which prevents the rapid release of the differential pressure, impairs the operation of the valve and, as a result, the accuracy of measuring the flow rate of the liquid. A disadvantage of the known device is also a short service life associated with the rapid wear of the sealing elements.

 The invention solves the problem of increasing the efficiency and accuracy of regulating the pressure drop and the device as a whole, increasing its service life.

 The technical result achieved by using the invention is to reduce the opening angle of the gate.

 The specified technical result is achieved in that in a device comprising a housing with a blocked opening, a cover, a gate with a through hole located between the housing and the cover, sealing elements, a lever acting on the gate through the roller, it is new that the gate is made with an opening in in the form of a loop with a concave side, and the concavity of this side corresponds to the profile of the passage section of the overlapped hole made eccentric.

 In FIG. 1 shows a front view of the proposed device, figure 2 is a side view.

 A device for controlling the differential pressure comprises a housing 1 (FIG. 2) with a blocked hole 2 (FIG. 2), a cover 3 (FIG. 2), a gate 4 (FIG. 1) with a passage hole 5 (FIG. 1), a lever 6 (figure 2) with a roller 7 (figure 2), the sealing elements of the housing and cover 8 (figure 2).

 The proposed device operates as follows. With an increase in the liquid level in an adjustable separation tank (not shown in the figures), the gate 4, under the action of the lever 6, closes the passage opening 2 of the device, as a result of which a pressure differential begins to arise in the well flow rate measuring system. Under the action of a pressure drop, the level in the separation tank begins to decrease. The change in level causes the reverse movement of the lever 6 and the gate 4. In this case, the maximum opening of the overlapped opening 2 of the device and the rapid release of the differential pressure with a small angle of rotation of the gate 4 are achieved.

 Thus, the invention in comparison with the prototype increases the efficiency of the device for regulating the differential pressure and increases its service life by reducing the wear of the sealing elements.

 The proposed device can be used to control the differential pressure when measuring the flow rate of the well as shutoff valves on production lines during transportation of natural gas and petroleum products.

Claims (1)

 A device for regulating the differential pressure, comprising a housing with a blocked opening, a cover, a gate with a through hole located between the housing and the cover, sealing elements, a lever acting on the gate through the roller, characterized in that the gate is made with a hole in the form of a loop with a concave side moreover, the concavity of this side corresponds to the profile of the passage section of the overlapped hole.

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