Pressure fine-tuning hydraulic valve group used in coiled tubing equipment

Abstract

The utility model discloses a pressure fine-tuning hydraulic valve group used in coiled tubing equipment, which comprises an overflow pressure reducing valve, a single-bead shuttle valve, a pilot reversing valve and a hydraulic valve block, the overflow pressure reducing valve is arranged on the upper end face of the hydraulic valve block, and a T port, a third port, a fourth port, a P port, a first port and a second port are arranged on the side face of the hydraulic valve block. The pilot reversing valve is arranged on the side face of the hydraulic valve block, the single-bead shuttle valve is arranged on the side face of the hydraulic valve block, and the high-pressure ports in the first port and the second port are communicated to a pilot oil port below through the single-bead shuttle valve. According to the utility model, the pressure of an inlet high-pressure main oil path is adjusted to be reduced to the pressure required by an outlet, meanwhile, the full-flow overflow function from the outlet to an oil tank is realized, the characteristics of pressure / flow are very flat, the stability is good, the hysteresis is very low, and the action of hydraulic equipment is more accurate and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a pressure fine-tuning hydraulic valve group used in continuous oil pipe equipment. Background Art

[0002] A hydraulic valve is an automatic component operated by pressure oil. It is controlled by the pressure oil of a pressure regulating valve and is usually used in combination with an electromagnetic pressure regulating valve. It can be used to remotely control the on / off of the oil, gas, and water pipeline systems of a hydropower station. It is commonly used for clamping, controlling, lubricating, and other oil circuits.

[0003] The existing pressure used in coiled tubing equipment is relatively high and unstable, resulting in inaccurate operation and control of the hydraulic equipment.

[0004] Therefore, we propose a pressure fine-tuning hydraulic valve group for use in a coiled tubing device to solve the above-mentioned problems. Utility Model Content

[0005] The utility model aims to provide a pressure fine-tuning hydraulic valve group used in a coiled tubing device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure fine-tuning hydraulic valve group for coiled tubing equipment, comprising: a relief pressure reducing valve, a single-ball shuttle valve, a pilot reversing valve and a hydraulic valve block;

[0007] The overflow pressure reducing valve is arranged on the upper end surface of the hydraulic valve block;

[0008] The side of the hydraulic valve block is provided with a T port, a No. 3 port, a No. 4 port, a P port, a No. 1 port and a No. 2 port;

[0009] The pilot reversing valve is arranged on the side of the hydraulic valve block, and the single-ball shuttle valve is arranged on the side of the hydraulic valve block. The single-ball shuttle valve connects the port with higher pressure between the No. 1 port and the No. 2 port to the lower pilot oil port.

[0010] Preferably, the front end surface of the hydraulic valve block is provided with a T port, a No. 3 port, and a No. 4 port, and the rear end surface of the hydraulic valve block is provided with a P port, a No. 1 port, and a No. 2 port.

[0011] Preferably, the relief pressure reducing valve is of pilot-controlled type.

[0012] Preferably, the pilot reversing valve is a spring-biased two-position four-way pilot-operated cartridge valve.

[0013] Preferably, the T-port is a fuel tank connection port.

[0014] Preferably, the No. 3 port and the No. 4 port are working oil ports.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The inlet high-pressure main oil circuit pressure is adjusted to reduce the outlet pressure, and at the same time it has a full flow overflow function from the outlet to the oil tank. It also has very flat pressure / flow characteristics, good stability and extremely low hysteresis, making the movement of hydraulic equipment more precise and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 It is a side view of the utility model;

[0019] Figure 3 For this utility model Figure 1 perspective drawing;

[0020] Figure 4 This is a working principle diagram of the utility model.

[0021] In the figure: 1, overflow pressure reducing valve; 2, single-ball shuttle valve; 3, pilot reversing valve; 4, hydraulic valve block; 41, T port; 42, No. 3 port; 43, No. 4 port; 44, P port; 45, No. 1 port; 46, No. 2 port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4 The utility model provides a technical solution: a pressure fine-tuning hydraulic valve group for coiled tubing equipment, comprising: a relief pressure reducing valve 1, a single-ball shuttle valve 2, a pilot reversing valve 3 and a hydraulic valve block 4;

[0024] The relief pressure reducing valve 1 is arranged on the upper end surface of the hydraulic valve block 4. The relief pressure reducing valve 1 is a pilot control type, which adjusts the inlet high-pressure main oil circuit pressure to the required outlet pressure, and has a full flow overflow function from the outlet to the oil tank, and has a very flat pressure / flow characteristic, good stability and extremely low hysteresis;

[0025] The front end surface of the hydraulic valve block 4 is provided with a T port 41, a No. 3 port 42, and a No. 4 port 43;

[0026] The rear end surface of the hydraulic valve block 4 is provided with a P port 44, a No. 1 port 45, and a No. 2 port 46;

[0027] The pilot reversing valve 3 is arranged on the side of the hydraulic valve block 4. The pilot reversing valve 3 is a spring-biased two-position four-way pilot-operated cartridge valve. The valve core is switched by the minimum pilot pressure acting on the lower pilot oil port. The upper pilot oil port is used as an oil drain port and is connected back to the oil tank. When the pilot pressure is removed, the valve core switches to the offset position. The residual pressure of the pilot port will affect the valve core position, and the back pressure of the oil drain port will hinder the valve core switching with a 1:1 pressure offset;

[0028] The single-ball shuttle valve 2 is arranged on the side of the hydraulic valve block 4. The single-ball shuttle valve 2 connects the port with higher pressure between the No. 1 port 45 and the No. 2 port 46 to the pilot oil port below, thereby controlling the action of the pilot reversing valve core. After the pressure oil at the high-pressure oil port enters the valve block, it first enters the overflow pressure reducing valve 1. The outlet pressure can be fine-tuned by adjusting the screw. After the overflow pressure reduction, part of the pressure oil enters the pilot reversing valve 3, and the other part overflows back to the oil tank.

[0029] When the pressures of port 1 45 and port 2 46 are both lower than the minimum pilot pressure of pilot reversing valve 3, the spool of the reversing valve is kept in the left position under the action of the spring. At this time, the pressure oil working oil circuit is: port P 44, relief pressure reducing valve 1, the left position of pilot reversing valve 3, port 3 42, and the return oil circuit is: port 43, port T 41, and port T 41 is the oil tank connection port;

[0030] When the pressure at port 1 45 and port 2 46 is higher than the minimum pilot pressure of the pilot reversing valve 3 , the reversing valve switches to the right position. At this time, the pressure oil working circuit is: port P 44 , relief pressure reducing valve 1 , the right position of the pilot reversing valve 3 , port 43 , and the return oil circuit is: port 3 42 , port T 41 .

[0031] The valve group can fine-tune the system pressure and has a very flat pressure / flow characteristic and good stability.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure fine-tuning hydraulic valve group used in a coiled tubing device, characterized in that: include: Relief pressure reducing valve (1), single ball shuttle valve (2), pilot reversing valve (3) and hydraulic valve block (4); The overflow pressure reducing valve (1) is arranged on the upper end surface of the hydraulic valve block (4); The side surface of the hydraulic valve block (4) is provided with a T port (41), a No. 3 port (42), a No. 4 port (43), a P port (44), a No. 1 port (45) and a No. 2 port (46); The pilot reversing valve (3) is arranged on the side of the hydraulic valve block (4), and the single ball shuttle valve (2) is arranged on the side of the hydraulic valve block (4). The single ball shuttle valve (2) connects the port with higher pressure between the No. 1 port (45) and the No. 2 port (46) to the pilot oil port below.

2. The pressure fine-tuning hydraulic valve group used in the coiled tubing equipment according to claim 1 is characterized in that: The front end surface of the hydraulic valve block (4) is provided with a T port (41), a No. 3 port (42), and a No. 4 port (43), and the rear end surface of the hydraulic valve block (4) is provided with a P port (44), a No. 1 port (45), and a No. 2 port (46).

3. The pressure fine-tuning hydraulic valve group for coiled tubing equipment according to claim 1 is characterized in that: The relief pressure reducing valve (1) is of a pilot-controlled type.

4. The pressure fine-tuning hydraulic valve group for coiled tubing equipment according to claim 1 is characterized in that: The pilot reversing valve (3) is a spring-biased two-position four-way pilot-operated cartridge valve.

5. The pressure fine-tuning hydraulic valve group for coiled tubing equipment according to claim 2 is characterized in that: The T port (41) is a fuel tank connection port.

6. The pressure fine-tuning hydraulic valve group for coiled tubing equipment according to claim 2, characterized in that: The third port (42) and the fourth port (43) are working oil ports.

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