CN219529723U

CN219529723U - Transmission assembly of valve head of suspension type mud pulse generator

Info

Publication number: CN219529723U
Application number: CN202320514247.XU
Authority: CN
Inventors: 李刚
Original assignee: Chengdu Ruixin Tuoda Energy Technology Co ltd
Current assignee: Chengdu Ruixin Tuoda Energy Technology Co ltd
Priority date: 2023-03-16
Filing date: 2023-03-16
Publication date: 2023-08-15
Anticipated expiration: 2033-03-16

Abstract

The utility model relates to the field of downhole drilling tools, and discloses a transmission assembly of a valve head of a suspension type mud pulse generator, which comprises a shell cover arranged on a protective shell, wherein a motion control assembly, an input shaft, a planetary reduction gearbox, a ball screw pair and a main shaft which are connected with each other are sequentially arranged in the protective shell along the bottom of the protective shell, the main shaft penetrates through the shell cover, a connecting cylinder is arranged on a nut of the ball screw pair, one end, far away from the nut, of the connecting cylinder is arranged on the main shaft, a limit groove is formed in the main shaft, an anti-rotation pin is arranged in the protective shell, and the anti-rotation pin is slidably arranged in the limit groove. The beneficial effects of the utility model are as follows: the torque output by the motor is transmitted to the ball screw pair after being increased through the planetary reduction gearbox, the rotational motion is converted into linear motion through the ball screw pair and transmitted to the main shaft, the valve head is opened and closed through the back and forth sliding of the main shaft to generate pressure difference, the pressure difference generated by rotary shearing of mud flow is replaced, the work load of a transmission part is reduced, and the risk of shaft breakage is reduced.

Description

Transmission assembly of valve head of suspension type mud pulse generator

Technical Field

The utility model relates to the field of downhole drilling tools, in particular to a transmission assembly of a valve head of a suspension type mud pulse generator.

Background

In the conventional mud pulser, a motor drives a screw rod or an electromagnetic valve to control and drive a small valve head to reciprocate so as to switch the small valve, and when the small valve is in an open state, the shunt mud pressure and a main valve spring jointly act to drive a main valve rod to move downwards, so that the aim of closing most mud flow channels (generating mud pulse signals) is fulfilled. However, due to the structural design, the main valve rod is easily blocked by sand grains or particles in the slurry in the up-and-down motion process in the inclined inner part, so that the action is stopped or blocked, and no slurry pulse signal is generated by the instrument. Although rotary valve pulsers can perfectly solve the problem of sand blocking, such as the one of Chinese patent (issued patent number: CN211549676U name: a rotary valve pulser with high reliability), the use cost is very high due to the mechanical structure and design. The pulse device Gao Pinci switch valve (rotor Gao Pinci is positively and negatively rotated) is easy to break due to the fact that materials are consumed too fast due to fatigue of a main shaft and an output shaft of a reduction gearbox (pulse signals are generated by rotating a fan-shaped rotor to intercept a liquid inlet end of a fan-shaped surface of a stator to form a pressure difference so as to generate slurry pulse signals), particularly under the working condition that the displacement reaches 65-70L/S, the rotor bears extremely large shearing force, so that a mechanical transmission part and a motor are heated seriously under high load, a control circuit board is heated seriously under high load, the motor and the circuit board are damaged easily, the structure of the valve head is required to be redesigned to solve the problem of sand blocking, and meanwhile, the problem that the sand blocking is easy to break can be solved by the rotary valve pulse device by matching with a new transmission assembly.

Disclosure of Invention

The utility model aims to provide a transmission assembly of a valve head of a suspension type mud pulse generator, which overcomes the defects of the prior art.

The aim of the utility model is achieved by the following technical scheme: the utility model provides a transmission assembly of suspension type mud pulse generator's valve head, includes protective housing and cap, the detachable installation of cap is in on the port of protective housing, install motion control assembly, input shaft, planetary reduction box, ball pair and main shaft in proper order along its bottom in the protective housing, the main shaft runs through the cap, motion control assembly's power take off installs magnetic coupling device, magnetic coupling device is used for connecting the power input of input shaft, the power take off of input shaft with planetary reduction box is connected, the shaft coupling is installed to planetary reduction box's power take off, the shaft coupling is used for connecting ball pair's lead screw's power input, demountable installation has the connecting cylinder on ball pair's the nut, the connecting cylinder is kept away from the one end demountable installation of nut is in the power input of main shaft, the spacing groove has been seted up along its axial lead direction on the main shaft, the spacing groove radially runs through the main shaft, be provided with anti-rotation pin in the protective housing, anti-rotation pin slidable mounting is in the spacing groove.

Preferably, a pressure balance piston is arranged in the protective shell in a tight fit manner, the pressure balance piston is sleeved at the power output end of the main shaft, an oil filling hole is formed in the protective shell, a plug is arranged in the oil filling hole, and the plug is far away from the anti-rotation pin.

Preferably, the motion control assembly comprises a high-temperature motor and a driving circuit board, the magnetic coupling device is arranged at the power output end of the high-temperature motor, and the driving circuit board is used for controlling the high-temperature motor to rotate positively and negatively.

Preferably, the end of the spindle located outside the cover is detachably fitted with a small valve head.

Preferably, the protective housing comprises stopper screen shell, main shaft shell, lead screw shell, input shaft shell and the control shell that connect gradually, the protective housing passes through stopper screen shell demountable installation is in on the valve head, stopper screen shell with the main shaft shell be connected, the main shaft shell with the lead screw shell be connected, the lead screw shell with the input shaft shell be connected, the input shaft shell with the connection of control shell is threaded connection.

Preferably, the stopper screen shell is provided with a liquid discharge hole.

Compared with the prior art, the utility model has the beneficial effects that:

the torque output by the motor is transmitted to the ball screw pair after being increased through the planetary reduction gearbox, the rotational motion is converted into linear motion through the ball screw pair and transmitted to the main shaft, the valve head is opened and closed through the back and forth sliding of the main shaft to generate pressure difference, the pressure difference generated by rotary shearing of mud flow is replaced, the work load of a transmission part is reduced, and the risk of shaft breakage is reduced.

Drawings

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

FIG. 2 is a schematic cross-sectional view of A-A of FIG. 1;

FIG. 3 is an enlarged partial schematic view at B in FIG. 2;

FIG. 4 is an enlarged partial schematic view of FIG. 2 at C;

FIG. 5 is a partially enlarged schematic illustration of FIG. 2D;

FIG. 6 is an enlarged partial schematic view of FIG. 2 at E;

FIG. 7 is a schematic view of the mounting structure of the present utility model;

in the figure, the valve body is 1-, the main valve rod is 2-, the flow limiting ring is 3-, the compression spring is 4-, the main valve sleeve is 5-, the flow guiding hole is 7-, the valve cover is 11-, the input shaft is 12-, the planetary reduction box is 13-, the ball screw pair is 14-, the main shaft is 15-, the magnetic coupling device is 16-, the coupling is 17-, the connecting cylinder is 18-, the limiting groove is 19-, the pin is 20-rotation preventing, the pressure balancing piston is 21-, the plug is 22-, the high-temperature motor is 23-, the driving circuit board is 24-, the valve head is 25-, the screen housing is 26-, the main shaft housing is 27-, the screw housing is 28-, the input shaft housing is 29-the control housing is 30-and the liquid draining hole is 31-.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. The components of the embodiments of the present utility model 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 utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present utility model and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 6, a transmission assembly of a valve head of a suspension type slurry pulse generator comprises a protective shell and a shell cover 11, wherein the shell cover 11 is detachably arranged on a port of the protective shell, a motion control assembly, an input shaft 12, a planetary reduction gearbox 13, a ball screw pair 14 and a main shaft 15 are sequentially arranged in the protective shell along the bottom of the protective shell, the main shaft 15 penetrates through the shell cover 11, a power output end of the motion control assembly is provided with a magnetic coupling device 16, the magnetic coupling device 16 is used for connecting a power input end of the input shaft 12, the magnetic coupling device consists of an inner magnet, an outer magnet and a sealed shell, the inner magnet is arranged on the input shaft 12, the outer magnet is arranged in the sealed shell on the power output end of the motion control assembly, the outer magnet is sleeved on the inner magnet, the power output end of the input shaft 12 is connected with the planetary reduction gearbox 13, the power output end of the planetary reduction gearbox 13 is provided with a coupling 17, the coupling 17 is used for connecting the power input end of the screw rod of the ball screw pair 14, the nut of the ball screw pair 14 is detachably provided with the connecting cylinder 18, the connecting cylinder 18 is sleeved on the nut and clamps the nut through the retainer ring, one end of the connecting cylinder 18, which is far away from the nut, is detachably arranged at the power input end of the main shaft 15, the main shaft 15 is inserted into the connecting cylinder 18, then the main shaft 15 is locked by screwing the screw into the connecting cylinder 18, the main shaft 15 is provided with a limit groove 19 along the axial lead direction thereof, the limit groove 19 radially penetrates through the main shaft 15, the protective shell is internally provided with an anti-rotation pin 20, the anti-rotation pin 20 is slidably arranged in the limit groove 19, the motion control assembly comprises a high temperature motor 23 and a driving circuit board 24, the magnetic coupling device 16 is arranged at the power output end of the high temperature motor 23, the driving circuit board 24 (the mark in the figure is an installation framework, the driving circuit board is not shown) is used for controlling the high-temperature motor 23 to rotate positively and negatively, torque output by the motor is transmitted to the ball screw pair 14 after being increased through the planetary reduction gearbox 13, rotary motion is converted into linear motion through the ball screw pair 14 and transmitted to the main shaft 15, and the main shaft 15 slides back and forth to open and close the valve head to generate pressure difference, so that the pressure difference generated by rotary shearing of mud flow is replaced, the work load of a transmission part is reduced, and the risk of shaft breakage is reduced.

In this embodiment, as shown in fig. 3, the small valve head 25 is detachably mounted at the end of the main shaft 15 located outside the cover 11, the main shaft 15 seals the valve head, so that the replacement cost is high, the small valve head 25 seals the valve head, and the maintenance cost for replacement after abrasion is reduced.

In this embodiment, as shown in fig. 1, the protection shell is composed of a plug screen shell 26, a spindle shell 27, a screw shell 28, an input shaft shell 29 and a control shell 30 which are sequentially connected, the protection shell is detachably mounted on the valve head through the plug screen shell 26, the plug screen shell 26 is connected with the spindle shell 27, the spindle shell 27 is connected with the screw shell 28, the screw shell 28 is connected with the input shaft shell 29, and the input shaft shell 29 is connected with the control shell 30 through threads, and the detachably connected protection shell is convenient for sectional assembly and replacement of all components in the shell without complete disassembly and assembly.

In this embodiment, as shown in fig. 7, a drain hole 31 is formed on a stopper screen housing 26, the valve head comprises a valve body 1 and a main valve rod 2, a main flow channel is formed on the valve body 1, the main valve rod 2 is inserted into the main flow channel and detachably connected with the valve body 1, the main valve rod positioned outside the valve body 1 is in threaded connection with the stopper screen housing 26, a start-stop member is installed in the main flow channel, the start-stop member comprises a flow limiting ring 3, a compression spring 4 and a main valve sleeve 5, the flow limiting ring 3 is detachably installed in the main flow channel, the compression spring 4 and the main valve sleeve 5 are both sleeved on the main valve rod 2, the compression spring 4 is used for pushing the main valve sleeve 5 to the flow limiting ring 3, the main flow channel is closed by propping the main valve sleeve 5 against the inner ring of the flow limiting ring 3, a flow dividing channel is formed on the main valve rod 2 along the direction of the main flow channel, the diversion channel is opened through the small valve head 25 to enable the opening and closing member to close the main flow channel, the diversion channel is provided with the diversion hole 7, the diversion hole 7 is used for communicating the inner cavity of the main valve sleeve 5 with the diversion channel, a part of slurry is diverted into the main valve rod 2, a small part of slurry in the diversion part is supplied to the pressure of the main valve head through the diversion hole 7, the upward force of the spring is overlapped again to enable the main valve head to move upwards and approach the flow limiting ring 3, the slurry pressure in the valve body 1 is instantly increased (30-80 PSi 30/145=0.206-0.55 MPa, the slurry pressure difference is a slurry pulse signal), and the rest of slurry flows into the screen plugging shell 26 and then flows out through the liquid discharge hole 31 on the screen plugging shell 26, so that the slurry pulse signal is repeatedly generated continuously.

In this embodiment, as shown in fig. 3 and 6, a pressure balance piston 21 made of rubber is tightly fitted in a protective housing, the pressure balance piston 21 is sleeved on a power output end of the main shaft 15, an oil filling hole is formed in the protective housing, a plug 22 is installed in the oil filling hole, the plug 22 is far away from the anti-rotation pin 20, the pressure balance piston 21 prevents sediment from entering the main shaft housing, and the magnetic coupler 16 prevents lubricating oil from entering the high-temperature motor 23.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a transmission assembly of valve head of suspension type mud pulse generator, includes protective housing and cap (11), cap (11) detachable installs on the port of protective housing, install motion control assembly, input shaft (12), planetary reduction case (13), ball pair (14) and main shaft (15) in proper order along its bottom in the protective housing, main shaft (15) run through cap (11), its characterized in that: the utility model discloses a motor control assembly, including motor control assembly, input shaft (12), coupling device (16), coupling device (18) are installed to the power take off end of motion control assembly, coupling device (16) are used for connecting the power take off end of input shaft (12), the power take off end of input shaft (12) with planetary reduction gearbox (13) are connected, shaft coupling (17) are installed to the power take off end of planetary reduction gearbox (13), shaft coupling (17) are used for connecting the power take off end of the lead screw of ball screw pair (14), demountable installation has connecting cylinder (18) on the nut of ball screw pair (14), one end demountable installation that connecting cylinder (18) kept away from the nut is in the power take off end of main shaft (15), limiting groove (19) have been seted up along its axial lead direction on main shaft (15), limiting groove (19) radially run through main shaft (15), be provided with anti-rotation pin (20) in the protective housing, anti-rotation pin (20) slidable mounting is in limiting groove (19).

2. A drive assembly for a valve head of a suspended mud pulser as set forth in claim 1, wherein: the pressure balance piston (21) is arranged in the protective shell in a tight fit mode, the pressure balance piston (21) is sleeved at the power output end of the main shaft (15), an oil filling hole is formed in the protective shell, a plug (22) is arranged in the oil filling hole, and the plug (22) is far away from the anti-rotation pin (20).

3. A drive assembly for a valve head of a suspended mud pulser as set forth in claim 1, wherein: the motion control assembly comprises a high-temperature motor (23) and a driving circuit board (24), the magnetic coupling device (16) is arranged at the power output end of the high-temperature motor (23), and the driving circuit board (24) is used for controlling the high-temperature motor (23) to rotate positively and negatively.

4. A drive assembly for a valve head of a suspended mud pulser as set forth in claim 1, wherein: a small valve head (25) is detachably arranged at the end part of the main shaft (15) positioned outside the shell cover (11).

5. A drive assembly for a valve head of a suspended mud pulser as set forth in claim 1, wherein: the protective housing comprises stopper screen shell (26), main shaft shell (27), lead screw shell (28), input shaft shell (29) and control shell (30) that connect gradually, the protective housing passes through stopper screen shell (26) demountable installation is in on the valve head, stopper screen shell (26) with be connected of main shaft shell (27), main shaft shell (27) with be connected of lead screw shell (28), lead screw shell (28) with be connected of input shaft shell (29), input shaft shell (29) with be connected of control shell (30) is threaded connection.

6. The drive assembly for a valve head of a suspended mud pulser according to claim 5, wherein: the stopper screen shell (26) is provided with a liquid discharge hole (31).