CN223806263U - A slide valve type pump unit - Google Patents

Abstract

The utility model relates to the technical field of lubricating devices, in particular to a sliding valve type pump unit which comprises a pump body and a sliding valve assembly, wherein the pump body is divided into a sliding valve pump body and a plunger pump body, the sliding valve pump body is divided into a connecting section and a working section which are connected, the top connecting section is communicated with the plunger pump body, the inner diameters of the sliding valve pump body and the plunger pump body are identical, the sliding valve assembly is arranged in the sliding valve pump body, the sliding valve assembly comprises a valve core, a restoring spring and a plug, an oil outlet notch is formed in the plug, the valve core is arranged in the center of the plug in a sliding manner, an oil outlet cylinder is arranged at the head part of the valve core, the oil outlet cylinder is tightly attached to the inner wall of the connecting section of the sliding valve pump body, an oil outlet guide hole is formed in the bottom of the wall of the oil outlet cylinder, a plunger rod is arranged in the plunger pump body, a pump oil inlet hole is formed in the plunger pump body, and the device is sealed tightly, leakage is reduced, foreign matters are prevented, working efficiency is improved, and service life is prolonged.

Description

Sliding valve type pump unit

Technical Field

The utility model relates to the technical field of lubricating pumps, in particular to a sliding valve type pump unit.

Background

In the development process of oil fields, a plunger oil pump is one of main lifting devices, a fixed valve and a traveling valve are arranged in the traditional plunger oil pump, a cone valve core and a spherical valve core are mainly used in the original structure, the flow control performance and the pressure resistance performance of the plunger oil pump are low, the plunger oil pump cannot be suitable for extreme environments, due to the influences of well condition environments and water hammer effects, the phenomena of valve seat puncture, valve ball sealing inaccuracy and the like easily occur in the operation process of the plunger oil pump, pump efficiency is reduced or failure is caused, air lock and sand blocking phenomena are easily generated, a sliding block of the traveling valve slides up and down in an oil outlet cover, the top of an inner cavity of the oil outlet cover is sealed, the sliding valve moves in the oil outlet cover easily to be misplaced, balance is lost, the equipment structure is unstable, and the cost ratio occupied by a valve ball seat is high in the processing and manufacturing processes.

Disclosure of utility model

The application aims to provide a sliding valve type pump unit, which aims to solve the problems in the prior art.

The embodiment of the application provides a slide valve type pump unit, which comprises a pump body and a slide valve component; the plunger pump body is divided into a connecting section and a working section which are connected, the top connecting section is communicated with the plunger pump body, the inner diameters of the top connecting section and the plunger pump body are the same, a plunger valve assembly is arranged in the plunger valve pump body, the plunger valve assembly comprises a valve core, a restoring spring and a plug, the plug is fixedly connected to the tail part of the working section of the plunger valve pump body, an oil outlet notch is formed in the plug, the valve core is arranged in the center of the plug in a sliding mode, an oil outlet cylinder is arranged at the end part of the valve core, the oil outlet cylinder is located in the connecting section of the plunger valve pump body, the oil outlet cylinder is closely attached to the inner wall of the connecting section of the plunger valve pump body, an oil outlet guide hole is formed in the bottom of the wall of the oil outlet cylinder, a plunger rod is arranged in the plunger pump body, a plug is arranged at the movable end outside the plunger rod, a pump oil chamber is formed between the plunger rod and the valve core, an oil inlet hole is formed in the plunger pump body, a compression spring is arranged outside the plunger rod, the movable end outside the plunger rod extends into an adjusting cylinder, and a cam is arranged in the adjusting cylinder.

Further, the tail part of the working section of the slide valve pump body is an oil outlet which is communicated with an external oil delivery pipe.

Further, the inner diameter of the connecting section of the slide valve pump body is smaller than that of the working section, and a restoring spring is arranged outside a valve core in the working section of the slide valve pump body.

Further, a circular convex block is arranged at the bottom of the oil outlet cylinder and is positioned in the working section of the slide valve pump body, and a flow gap is formed between the circular convex block and the inner wall of the working section of the pump body.

Further, an eccentric rotating shaft is arranged on the eccentric cam and is in rotary connection with the adjusting cylinder, and the eccentric rotating shaft is connected with the output end of an external motor.

The sliding valve has the advantages that the structure is simple, the original conical valve core and the spherical valve core are updated to be the sliding valve core, the flow and pressure performance of the pump unit are improved, the production cost is reduced, the sliding valve type plunger pump unit is tightly sealed, leakage can be effectively reduced, the bottom of the sliding valve pump body is provided with the plug, the top of the valve core is tightly contacted with the pump body, dislocation is not easy to occur in the sliding process, the equipment operation is relatively stable, the sliding valve is suitable for extreme environments, foreign matters are prevented, and the service life is prolonged.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic diagram of the structure of the pump body during oil feeding.

Fig. 3 is a schematic diagram of the structure of the pump body during oil discharge.

In the figure:

1. The hydraulic oil pump comprises a sealing block, a compression spring, a recovery spring, a plug, a 40 oil outlet notch, a 5 plunger rod, a 6 pump body, a 60 slide valve pump body working section, a 61 slide valve pump body connecting section, a 62 plunger pump body, a 7 valve core, a 70 circular convex block, a 8 gasket, a 9 oil inlet hole, a 10 oil outlet cylinder, a 11 oil outlet guide hole, a 13 oil pumping chamber, a 14 oil outlet, a 150 eccentric cam, a 151 and a rotating shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The sliding valve type pump unit comprises a pump body 6 and a sliding valve assembly, wherein the pump body 6 is a cylindrical body and is divided into a sliding valve pump body and a plunger pump body 62, the sliding valve pump body is divided into a connecting section 61 and a working section 60 which are connected, the top connecting section 61 is communicated with the plunger pump body 62, the inner diameters of the two connecting sections are the same, the sliding valve assembly is arranged in the sliding valve pump body, the sliding valve assembly comprises a valve core 7, a restoring spring 3 and a plug 4, the plug 4 is fixedly connected to the tail of a working section 60 of the sliding valve pump body, an oil outlet notch 40 is formed in the plug 4, lubricating oil can flow out from the notch, the valve core 7 is arranged in the center of the plug 4 in a sliding mode, the end portion of the valve core 7 is an oil outlet cylinder 10, the oil outlet cylinder 10 is positioned in the sliding valve pump body connecting section 61, the oil outlet cylinder 10 is closely attached to the inner wall of the sliding valve pump body connecting section 61, an oil outlet guide hole 11 is formed in the bottom of the wall of the oil outlet cylinder 10, a plunger rod 5 is arranged in the plunger pump body 62, a plug 1 is arranged at the outer end of the plunger rod 5, an oil outlet hole 13 is formed between the plunger 5 and the oil outlet cylinder 10, the plug 5 is fixedly connected to the tail of the working section 60, an oil outlet notch 40 is arranged at the end of the plunger piston 5, an oil outlet hole is arranged at the piston 5, an oil inlet end is arranged at the piston end, an eccentric end is arranged at the piston end of the plunger piston 2is arranged in the piston rod 2, an eccentric piston rod 2is arranged in the piston rod is arranged in the piston cylinder 2, and is arranged at an eccentric end is arranged at an adjusting end, and is connected to an eccentric piston end, and is arranged in a piston rod 2.

The tail part of the working section 60 of the slide valve pump body is an oil outlet 14, and the oil outlet 13 is communicated with an external oil delivery pipe.

The inner diameter of the slide valve pump body connecting section 61 is smaller than that of the working section 60, a restoring spring 3 is arranged outside the valve core 7 in the slide valve pump body working section 60, a gasket 8 is arranged on the restoring spring 3, and the restoring spring 3 is used for restoring the valve core 7.

The bottom of the oil outlet cylinder 10 is provided with a circular convex stop block 70, the circular convex stop block 70 is positioned in the slide valve pump body working section 60, a flow gap exists between the circular convex stop block 70 and the inner wall of the pump body working section 60, the circular convex stop block 70 and the plug 4 are used for limiting the position of the restoring spring 3, and lubricating oil can flow to the tail of the slide valve pump body working section 60 from the flow gap.

The eccentric cam 150 is provided with an eccentric rotating shaft 151, the eccentric rotating shaft 151 is rotationally connected with the adjusting cylinder, the eccentric rotating shaft 151 is connected with the output end of an external motor, the eccentric cam is of an existing eccentric wheel structure, the shape of the eccentric cam is not limited, two running lengths with different lengths are generated when the eccentric wheel rotates to control compression rebound of the plunger rod 5, when the long end of the eccentric cam 150 contacts with the movable end of the plunger rod 5 due to rotation, the plunger rod 5 and the compression spring 2 are compressed inwards, the eccentric cam 150 continues to rotate to enable the long end to leave the movable end of the plunger rod 5, the short end of the eccentric cam 150 does not contact with the plunger rod 5, and the plunger rod 5 moves outwards in a rebound mode under the action of the compression spring 2.

When the pump body is used for oil feeding, the eccentric cam 150 rotates and is not contacted with the plunger rod 5, the plunger rod 5 moves outwards under the action of the compression spring 2, the oil inlet hole 9 on the plunger pump body 62 is opened, the slide valve core 7 returns to the original position under the action of the return spring 3, the pump oil chamber 13 generates vacuum degree, lubricating oil enters the pump oil chamber 13 from the oil inlet hole 9, when the eccentric cam 150 rotates to the long shaft end and contacts with the plunger rod 5 to press the plunger rod 5, the plunger rod 5 moves inwards to drive the pump oil chamber 13 and the slide valve core 7 to synchronously displace in the same direction, the bottom of the oil outlet cylinder 10 at the end part of the valve core moves away from the slide valve pump body connecting section 61, the oil outlet guide hole 11 is opened, the lubricating oil flows to the inner cavity of the slide valve pump body working section 60 from the pump oil outlet hole 11, and then flows to the oil outlet 14 from the oil outlet notch 40 on the plug 4, and enters an external oil delivery pipe.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (5)

1. The sliding valve type pump unit is characterized by comprising a pump body and a sliding valve assembly, wherein the pump body is a cylindrical body and is divided into a sliding valve pump body and a plunger pump body, the sliding valve pump body is divided into a connecting section and a working section which are connected, the connecting section is communicated with the plunger pump body, the inner diameters of the connecting section and the plunger pump body are identical, the sliding valve assembly is arranged in the sliding valve pump body, the sliding valve assembly comprises a valve core, a restoring spring and a plug, the plug is fixedly connected to the tail of the working section of the sliding valve pump body, an oil outlet notch is formed in the plug, the valve core is arranged in the center of the plug in a sliding manner, an oil outlet cylinder is arranged at the end part of the valve core and is positioned in the connecting section of the sliding valve pump body, the oil outlet cylinder is tightly attached to the inner wall of the connecting section of the sliding valve body, an oil outlet guide hole is formed in the bottom of the wall of the oil outlet cylinder, a plunger rod is arranged in the plunger pump body, a plug piston rod is arranged at the outer moving end of the plunger rod, a pump oil chamber is formed between the plunger rod and the plunger rod, an oil inlet hole is formed in the pump body, the plunger spring is arranged outside the plunger pump body, the plunger rod extends into an adjusting cylinder, and the eccentric cylinder is arranged in the adjusting cylinder.

2. The slide valve pump unit of claim 1, wherein the tail of the working section of the slide valve pump body is an oil outlet, and the oil outlet is communicated with an external oil delivery pipe.

3. The slide valve pump unit according to claim 1, wherein the inner diameter of the spool pump body connecting section is smaller than the inner diameter of the working section, and a restoring spring is provided outside the spool in the spool pump body working section.

4. The slide valve pump unit according to claim 1, wherein the bottom of the oil outlet cylinder is provided with a circular convex block, the circular convex block is positioned in the working section of the slide valve pump body, and a flow gap exists between the circular convex block and the inner wall of the working section of the pump body.

5. The slide valve pump unit according to claim 1, wherein the eccentric cam is provided with an eccentric rotating shaft, the eccentric rotating shaft is rotatably connected with the adjusting cylinder, and the eccentric rotating shaft is connected with an output end of an external motor.