CN211398102U

CN211398102U - Multi-sensitive-pump confluence loop of drilling machine

Info

Publication number: CN211398102U
Application number: CN201922221898.6U
Authority: CN
Inventors: 张树岗; 张兴旺; 王建兵; 董珍书; 刘情
Original assignee: Shandong Kerui Machinery Manufacturing Co Ltd
Current assignee: Shandong Kerui oil and gas equipment Co.,Ltd.
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-09-01
Anticipated expiration: 2029-12-12

Abstract

A multi-sensitive pump confluence loop of a drilling machine belongs to the field of multi-pump confluence loops, and comprises a first load-sensitive pump, a second load-sensitive pump and an nth load-sensitive pump, wherein n is a natural number more than or equal to 2, a pump port of the first load-sensitive pump is connected with a first one-way valve, a pump port of the second load-sensitive pump is connected with a second one-way valve, a pump port of the nth load-sensitive pump is connected with an nth one-way valve, the upper sides of the first one-way valve, the second one-way valve and the nth one-way valve are connected with a high-pressure filter after confluence through a main pressure pipeline of the pressure pump, the main pressure pipeline of the pressure pump is also connected with an oil inlet of a pilot control type pressure reducing valve after confluence, and the pilot control type pressure reducing valve and the high-pressure filter are in parallel connection; the upper side of the high-pressure filter is connected with a P port of the closed core load sensitive valve, the upper side of the high-pressure filter is also connected with a pressure gauge, and the closed core load sensitive valve and the pressure gauge are in parallel connection.

Description

Multi-sensitive-pump confluence loop of drilling machine

Technical Field

The utility model belongs to the technical field of many pumps confluence return circuit technique and specifically relates to just one kind rig is many sensitive pumps confluence return circuit.

Background

With the upgrading of petroleum machinery in China, hydraulic systems are widely applied in design and manufacture. The lifting and lowering of a skid-mounted oil drilling machine base and the lifting and lowering of a drilling machine derrick are widely realized by adopting a hydraulic oil cylinder which is safer and more stable; the actuators of the drilling platform surface, such as oil pipe tongs, casing tongs, iron roughneck and the like, are generally driven by hydraulic pressure. The drilling machine base and the derrick are lifted and loaded, the cylinder diameter of an actuator oil cylinder is large, and the flow of a hydraulic system is required to be large enough to meet a certain lifting speed; the flow required for a table top actuator is much smaller. The base and the derrick are lifted and lowered once in a drilling work period, so that if a hydraulic system is designed according to large flow, waste is avoided, and the development purpose of energy conservation and environmental protection is not met. In order to meet the requirement of a drilling machine, a hydraulic system adopts a multi-pump confluence mode, which is a better solution. Because the distance between a power element and a control element of a hydraulic system of the drilling machine is far, a load feedback signal (LS) pipeline is too long, the problems of delay in matching of the pressure of the hydraulic system and the pressure required by an actuator, slow response and the like are caused, and the defects that the pressure of the hydraulic system is low, high pressure cannot be adjusted and the like exist after multiple pumps are combined.

Disclosure of Invention

In order to solve the problem, the utility model provides a many sensitive pumps of rig confluence return circuit.

The utility model provides a technical scheme that its technical problem adopted is: a multi-sensitive-pump confluence loop of a drilling machine comprises a first load sensitive pump, a second load sensitive pump and an nth load sensitive pump, wherein n is a natural number which is more than or equal to 2, a pump port of the first load sensitive pump is connected with a first one-way valve, a pump port of the second load sensitive pump is connected with a second one-way valve, a pump port of the nth load sensitive pump is connected with the nth one-way valve, n is a natural number which is more than or equal to 2, the upper sides of the first one-way valve, the second one-way valve and the nth one-way valve are connected with a high-pressure filter after confluence through a main pressure pipeline of the pressure pump, the main pressure pipeline of the pressure pump is also connected with an oil inlet of a pilot-operated pressure reducing valve after confluence, and the pilot-operated pressure reducing valve and the high-pressure filter are in; the upper side of the high-pressure filter is connected with a P port of a closed core load sensitive valve, the upper side of the high-pressure filter is also connected with a pressure gauge, the closed core load sensitive valve and the pressure gauge are in parallel connection, and a T port of the closed core load sensitive valve is directly connected with a hydraulic oil tank through a pipeline; the LS oil port of the closed core load sensitive valve is connected with the pilot control oil port of the pilot control type pressure reducing valve through a hydraulic pipeline, and the load oil port of the pilot control type pressure reducing valve is respectively connected with the oil port of the first load sensitive pump, the oil port of the second load sensitive pump and the oil port of the nth load sensitive pump.

Preferably, the pilot ratio of the pilot control type reducing valve is 1: 1.

Preferably, the first load-sensitive pump, the second load-sensitive pump and the nth load-sensitive pump are in parallel relation, wherein n is a natural number greater than or equal to 2.

The utility model has the advantages that: by additionally arranging a pilot control type pressure reducing valve with a pilot ratio of 1:1 in a control valve and hydraulic pump load feedback LS pipeline, the flow of a load pressure signal fed back to a pump by the control valve is amplified, so that the problem of pressure matching delay between the control valve and the pump is solved, and the response speed of a system is improved; meanwhile, the large LS flow can meet the leakage amount of the flow and the pressure matching module of a plurality of sensitive pumps, so that the problems that the pressure of a hydraulic system is low and cannot be increased are solved.

Drawings

Fig. 1 is a schematic diagram of the circuit principle of the present invention.

Fig. 2 is a schematic diagram of the principle of the pilot-operated pressure reducing valve of the present invention.

The system comprises a first load sensitive pump 1, a second load sensitive pump 2, an nth load sensitive pump 3, a hydraulic oil tank 4, a pilot control type reducing valve 5, a hydraulic pipeline 6, a first check valve 7, a second check valve 8, an nth check valve 9, a pressure gauge 10, a high-pressure filter 11 and a closed core load sensitive valve 12.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the embodiment shown in fig. 1, the multi-sensitive-pump confluence circuit for the drilling machine comprises a first load-sensitive pump 1, a second load-sensitive pump 2 and an nth load-sensitive pump 3, wherein n is a natural number which is greater than or equal to 2. The pump ports are respectively connected with a first check valve 7, a second check valve 8 and an nth check valve 9, the main pressure pipeline of the hydraulic pump is connected with a high-pressure filter 11 after confluence, and is simultaneously connected with the oil port of a pilot control type pressure reducing valve 5 with a pilot ratio of 1: 1; the P port of the closed core load sensitive valve 12 is connected after passing through the high pressure filter 11, and is also connected with the pressure gauge 10, and the T port of the closed core load sensitive valve 12 is directly connected with the hydraulic oil tank 4 through a pipeline; the closed-core load sensitive valve 12 connects the working pressure of the actuator with the oil port of the pilot control type reducing valve 5 with the pilot ratio of 1:1 through the oil port of the valve body LS via the hydraulic pipeline 6, and the oil ports 5-1 of the pilot control type reducing valve 5 with the pilot ratio of 1:1 are respectively connected with the oil ports of the first load sensitive pump 1, the second load sensitive pump 2 and the nth load sensitive pump 3. The pilot control type reducing valve 5 with the pilot ratio of 1:1 feeds the closed-core load sensitive valve 12 back to the flow amplification of the load pressure signals of the first load sensitive pump 1, the second load sensitive pump 2 and the nth load sensitive pump 3, and the response speed of the load sensitive pumps is improved. Meanwhile, the flow of a large load pressure signal can meet the flow of a plurality of load sensitive pumps and the internal leakage of the pressure matching module, so that the plurality of load sensitive pumps can work normally after confluence.

The above embodiments are only specific cases of the present invention, and the protection scope of the present invention includes but is not limited to the product form and style of the above embodiments, any suitable changes or modifications to the multi-sensitive pump confluence circuit of the drilling machine and any person of ordinary skill in the art according to the claims of the present invention shall fall into the protection scope of the present invention.

Claims

1. A confluence loop of a plurality of sensitive pumps of a drilling machine is characterized in that: comprises a first load-sensitive pump (1), a second load-sensitive pump (2) and an nth load-sensitive pump (3), wherein n is a natural number more than or equal to 2, the pump port of the first load-sensitive pump (1) is connected with a first one-way valve (7), the pump port of the second load-sensitive pump (2) is connected with a second one-way valve (8), the pump port of the nth load sensitive pump (3) is connected with an nth check valve (9), wherein n is a natural number more than or equal to 2, the upper sides of the first check valve (7), the second check valve (8) and the nth check valve (9) are connected with a high-pressure filter (11) after converging through a main pressure pipeline of the pressure pump, the main pressure pipeline of the pressure pump is also connected to an oil inlet of the pilot control type reducing valve (5) after converging, the pilot control type reducing valve (5) is connected with the high-pressure filter (11) in parallel; the upper side of the high-pressure filter (11) is connected with a P port of a closed core load sensitive valve (12), the upper side of the high-pressure filter (11) is also connected with a pressure gauge (10), the closed core load sensitive valve (12) and the pressure gauge (10) are in parallel connection, and a T port of the closed core load sensitive valve (12) is directly connected with the hydraulic oil tank (4) through a pipeline; an LS oil port of the closed core load sensitive valve (12) is connected with a pilot control oil port of the pilot control type reducing valve (5) through a hydraulic pipeline (6), and a load oil port of the pilot control type reducing valve (5) is respectively connected with an oil port of the first load sensitive pump (1), an oil port of the second load sensitive pump (2) and an oil port of the nth load sensitive pump (3).

2. The multi-sensitive-pump confluence circuit of a drilling rig as claimed in claim 1, wherein: the pilot ratio of the pilot control type reducing valve (5) is 1: 1.

3. The multi-sensitive-pump confluence circuit of a drilling rig as claimed in claim 1, wherein: the first load sensitive pump (1), the second load sensitive pump (2) and the nth load sensitive pump (3) are in parallel relation, wherein n is a natural number which is more than or equal to 2.