CN201236793Y - Hydraulic valve cover or cylinder cap for high pressure drilling pump - Google Patents

Abstract

The utility model provides a hydraulic valve cap or a cylinder cap used for a high-reliability and high-pressure drilling pump. A hydraulic piston is arranged on the plug 10 of the cap body 1 of the hydraulic valve cap or the cylinder cap to compress the plug 10; meanwhile, a screwed plug 2 screwed with the cap body and used for fastening the hydraulic piston is arranged on a hydraulic piston 3, and the hydraulic piston is connected with a hydraulic system through an oil channel arranged in the cap body. The utility model has sufficient pressing force and the function of loosing prevention, and can effectively solve and the problem that the cylinder can be pierced due to easy damage to the seal ring of the valve cap (or the seal ring of the cylinder cap).

Description

Hydraulic valve cover or cylinder cover for high pressure drilling pump

technical field

The utility model belongs to a hydraulic valve cover or a hydraulic cylinder cover in a well drilling pump used for oil and gas exploration and development.

Background technique

At present, the bonnet or cylinder head of the drilling pump manufactured both at home and abroad all adopt threaded glands, which are tightened by hammering. When the internal pressure is pulsating, the valve cover is loose, the valve cover seal is damaged, and the cylinder is pierced.

Contents of the invention

The purpose of this utility model is to design a hydraulic valve cover or cylinder cover for a high-pressure drilling pump. The huge pressure generated by the hydraulic cylinder will press the valve cover or cylinder cover plug and tighten it with a wire plug to prevent the valve cover or cylinder cover from being damaged. loose.

Specifically, the high-pressure drilling pump uses a hydraulic valve cover or a cylinder cover. A hydraulic piston is set on the plug of the hydraulic valve cover or the cover of the cylinder cover to compress the plug. It is used to tighten the plug of the hydraulic piston, and the hydraulic piston is connected with the hydraulic system through the oil channel set in the cover.

The hydraulic piston is in the shape of "convex", and a retaining ring and a sealing ring are installed on its lower circumference, an elastic retaining ring is installed on the upper end of the upper circumference, and a retaining ring is installed in the middle of the upper circumference.

The utility model has the advantages of adopting a hydraulic valve cover or a hydraulic cylinder cover, which has sufficient pressing force and functions of preventing loosening and retreating. Will ensure the tightness of the sealing ring.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Description of figure number:

1----bonnet 2----plug 3----piston

4----retaining ring 5----oil channel 6----retaining ring

7----Retaining ring 8----Sealing ring 9----Sealing ring

10---plug 11---hydraulic cylinder.

Detailed ways

As shown in Figure 1, the hydraulic valve cover or cylinder cover for a high-pressure drilling pump is composed of a valve cover body 1, a plug 2, a piston 3 and a hydraulic system. A hydraulic piston is set on the plug 10 of the cover body 1 of the hydraulic valve cover or cylinder head to compress the plug 10, and at the same time, a plug 2 screwed with the cover body is set on the hydraulic piston 3 to tighten the hydraulic piston. The hydraulic piston is connected with the hydraulic system through the oil passage arranged in the cover body. The hydraulic piston is in the shape of "convex", and a retaining ring and a sealing ring are installed on its lower circumference, an elastic retaining ring is installed on the upper end of the upper circumference, and a retaining ring is installed in the middle of the upper circumference.

The utility model generates high-pressure hydraulic oil through the hydraulic system to push the piston 3 to compress the plug 10, and then tighten the plug 2, and the system can be depressurized. It makes the contact surface between the plug and the cylinder form a real "metal to metal", fundamentally improving the sealing performance of the valve cover.

Claims (2)

1, a kind of high pressure drilling pump hydraulic pressure valve gap or cylinder cap, it is characterized in that: on the plug (10) of the lid (1) of hydraulic pressure valve gap or cylinder cap, hydraulic piston (3) is set and compresses plug (10), go up setting at hydraulic piston (3) simultaneously and spin in order to the plug (2) of also tight hydraulic piston with lid (1) screw thread, hydraulic piston (3) joins with hydraulic system by the asphalt channel (5) that is arranged in the lid (1).

2, high pressure drilling pump according to claim 2 hydraulic pressure valve gap or cylinder cap, it is characterized in that hydraulic piston (3) is " protruding " font, and back-up ring (4) and seal ring (9) are housed on the circumference of its underpart, in the top circumferential upper end circlip (7) is housed, back-up ring (6) is housed at top circumference middle part.

Images