Straight-through balanced pressure adjustable faucet

Abstract

The present invention discloses a straight-through balanced pressure adjustable water faucet, which is arranged at one side of the lower joint and is used to control the conduction state between the water inlet and the water outlet, and the water faucet comprises a cylinder, a rear end screw transmission assembly, and an opening adjustment mechanism; the cylinder is provided with a rear end screw transmission assembly and an opening adjustment mechanism in order from top to bottom along the axial direction, and a balanced pressure chamber is arranged between the cylinder and the opening adjustment mechanism, and the balanced pressure chamber is connected with the central channel of the lower joint through the pressure-conducting hole on the cylinder and the balanced pressure hole at the corresponding position on the lower joint; the opening adjustment mechanism is connected with the rear end screw transmission assembly, and is used to move up and down under the drive of the rear end screw transmission assembly to change the conduction state between the water inlet and the water outlet. The straight-through adjustable water faucet of the present invention has no differential pressure, a small motor load, and a straight-through flow channel of the faucet, and water enters from the front end of the faucet, which greatly reduces the risk of blockage.

Description

Technical Field

[0001] The invention belongs to the field of intelligent water injection in oil fields, and in particular relates to a straight-through balanced pressure adjustable water nozzle. Background Art

[0002] The intelligent stratified water injection process is a new water injection process that has gradually emerged in recent years. It is of great significance to increase oil field production. The main equipment used in this process is an integrated intelligent water distributor, which integrates the functions of measurement, adjustment, sealing, and measurement, greatly improving work efficiency and saving manpower and material costs. In the intelligent water distributor, the most critical component is the adjustable water nozzle. By controlling the motor of the adjustable water nozzle through programs and circuits, the switch and opening size can be adjusted, and then the injection flow rate can be adjusted.

[0003] Previously, there were three main types of adjustable faucets.

[0004] The first is a piston-type balanced water pressure nozzle, which relies on a lead screw to convert the rotational motion of the motor into reciprocating motion, and is connected to a ceramic body through a pull rod to move together, thereby realizing the switching and adjustment of the water nozzle. This structure leaves an air cavity at the front end of the water nozzle to balance the pressure difference force generated by the downhole pressure, but at the same time also blocks the flow channel at the front end of the water nozzle, so that the water flow can only flow around the rear end of the ceramic body and flow out after passing through the annular space in the middle. Its flow channel is complex, the space gap is small, and it is easy to get clogged.

[0005] The second is a semi-balanced pressure structure. In this structure, there are downhole fluids in front and behind the ceramic body of the faucet with equal pressure. The ceramic body is driven to reciprocate by a screw that is sealed at the root and fixed with a thrust bearing. The front end of the faucet is the water inlet, and the flow channel is direct and not easy to be blocked. However, the screw that transmits the motion is also immersed in the fluid, which is prone to sand jam. In addition, the pressure difference force will act on the screw and thrust bearing, increasing the load on the motor.

[0006] The last type is a rotary valve plate structure, which is similar to the second structure, but without a transmission screw. It relies on a motor to drive the rotary valve plate to rotate, switch and cover the flow holes on the fixed valve plate to achieve regulation. The faucet has a simple structure, but the two valve plates are hard seals and require a large pre-tightening force. At the same time, the faucet has an unbalanced pressure structure, and the motor load is large, so it often cannot be adjusted. In addition, the valve plate is easy to wear and has a limited life. Summary of the invention

[0007] In view of this, the main purpose of the present invention is to provide a straight-through balanced pressure adjustable water faucet.

[0008] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0009] The embodiment of the present invention provides a straight-through balanced pressure adjustable water faucet, which is arranged on one side of the lower joint and is used to control the conduction state between the water inlet and the water outlet. The water faucet includes a cylinder, a rear end screw transmission assembly, and an opening adjustment mechanism;

[0010] A rear end lead screw transmission assembly and an opening adjustment mechanism are arranged in the cylinder body in order from top to bottom along the axial direction, and a balanced pressure chamber is arranged between the cylinder body and the opening adjustment mechanism, and the balanced pressure chamber is connected with the central channel of the lower joint through the pressure guide hole on the cylinder body and the balanced pressure hole at the corresponding position on the lower joint;

[0011] The opening adjustment mechanism is connected to the rear end lead screw transmission assembly and is used for moving up and down driven by the rear end lead screw transmission assembly to change the conduction state between the water inlet and the water outlet.

[0012] In the above scheme, the rear end screw transmission assembly includes a reduction motor and a coupling screw. The motor output shaft of the reduction motor is connected to the coupling screw, and the coupling screw is connected to the opening adjustment mechanism.

[0013] The above scheme also includes an opening counting component, which is arranged between the cylinder and the rear end screw transmission component and is used to count the number of forward or reverse rotations of the rear end screw transmission component and determine the current opening.

[0014] In the above scheme, the opening counting component includes a circle counting module and a stroke control module. The circle counting module is arranged at the upper end position of the connecting screw, and is used to sense and record the number of rotation circles and approximate angle of the connecting screw. The stroke control module is arranged on the upper and lower sides of the connecting screw to determine whether the conduction state between the water inlet and the water outlet is fully open or fully closed. The stroke control module is also connected to the circle counting module, and is used to send a reset instruction to the circle counting module when the conduction state between the water inlet and the water outlet is fully open.

[0015] In the above scheme, the turn counting module includes a magnet and a Hall element. The magnet is arranged on the side wall of the upper end of the coupling screw, and the Hall element is arranged on the cylinder.

[0016] In the above scheme, the stroke control module includes a stroke frame, an upper stroke switch, a lower stroke switch, and a limit block. The upper and lower ends of the coupling screw are arranged in the cylinder through the stroke frame. The upper stroke switch and the lower stroke switch are respectively arranged on the upper and lower sides of the stroke frame. The limit block is located between the upper stroke switch and the lower stroke switch and is arranged on the coupling screw; the stroke switch is connected to the Hall element.

[0017] In the above scheme, the opening adjustment mechanism includes a transmission screw and a thrust rod. The upper end of the transmission screw is connected to the coupling screw of the rear end screw transmission assembly, and the lower end is connected to the thrust rod. The thrust rod changes the conduction state of the water outlet by moving up and down.

[0018] In the above scheme, a balanced pressure chamber is formed between the transmission screw and the cylinder, the upper end of the thrust rod is sleeved on the transmission screw and a first air chamber is formed between the two, and a second air chamber is formed between the thrust rod and the cylinder, and the first air chamber and the second air chamber are connected through the vent hole on the thrust rod.

[0019] In the above scheme, a first sealing ring is arranged between the thrust rod and the transmission screw, and a second sealing ring and a third sealing ring are arranged between the thrust rod and the cylinder at the upper and lower sides of the second air cavity, respectively.

[0020] In the above scheme, the thrust rod is located at the lower side of the third sealing ring and is sequentially sleeved with a pressure ring, an anti-scour sleeve and a pressure sleeve at the end; the cylinder is located at the lower side of the water outlet and is provided with a faucet sealing ring; and the lower end of the cylinder is provided with a water inlet joint.

[0021] Compared with the prior art, the straight-through adjustable faucet of the present invention has no differential pressure, a small motor load, and a straight-through flow channel of the faucet, with water entering from the front end of the faucet, which greatly reduces the risk of blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to disclose a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 It is a structural schematic diagram of a straight-through balanced pressure adjustable water faucet provided by an embodiment of the present invention;

[0024] Figure 2 It is a partial schematic diagram of a straight-through balanced pressure adjustable water faucet provided by an embodiment of the present invention;

[0025] Figure 3 It is an installation schematic diagram of the present invention installed on the lower joint of the intelligent water distributor. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0027] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, article or device. In the absence of more restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, article or device including the element.

[0029] The embodiment of the present invention provides a straight-through balanced pressure adjustable water nozzle, which is arranged on one side of the lower joint 5 and is used to control the conduction state between the water inlet 51 and the water outlet 52, such as Figure 1 As shown, the water nozzle includes a cylinder 1, a rear end screw transmission assembly 2, and an opening adjustment mechanism 3;

[0030] The cylinder 1 is provided with a rear end screw transmission assembly 2 and an opening adjustment mechanism 3 in order from top to bottom along the axial direction. A balanced pressure chamber 4 is provided between the cylinder 1 and the opening adjustment mechanism 3. The balanced pressure chamber 4 is connected with the central channel of the lower joint 5 through the pressure guide hole on the cylinder 1 and the balanced pressure hole 53 at the corresponding position on the lower joint 5.

[0031] The opening adjustment mechanism 3 is connected to the rear end screw transmission assembly 2 and is used to move up and down driven by the rear end screw transmission assembly 2 to change the conduction state between the water inlet 51 and the water outlet 52.

[0032] The rear end screw transmission assembly 2 includes a reduction motor 21 and a coupling screw 22 . The motor output shaft 211 of the reduction motor 21 is connected to the coupling screw 22 , and the coupling screw 22 is connected to the opening adjustment mechanism 3 .

[0033] It also includes an opening counting component 6, which is arranged between the cylinder 1 and the rear end screw transmission component 2, and is used to count the number of positive or reverse rotations of the rear end screw transmission component 2 and determine the current opening.

[0034] The opening counting component 6 includes a circle counting module 61 and a stroke control module 62. The circle counting module 61 is arranged at the upper end position of the connecting screw 22, and is used to sense and record the number of rotation circles and approximate angle of the connecting screw 22. The stroke control module 62 is arranged on the upper and lower sides of the connecting screw 22 to determine whether the conduction state between the water inlet 51 and the water outlet 52 is fully open or fully closed. The stroke control module 62 is also connected to the circle counting module 61, and is used to send a reset instruction to the circle counting module 61 when the conduction state between the water inlet 51 and the water outlet 52 is fully open.

[0035] The revolution counting module 61 includes a magnetic steel 611 and a Hall element 612 . The magnetic steel 611 is arranged on the side wall of the upper end of the coupling screw 22 , and the Hall element 612 is arranged on the cylinder 1 .

[0036] The stroke control module 62 includes a stroke frame 621, an upper stroke switch 622, a lower stroke switch 623, and a limit block 624. The upper and lower ends of the coupling screw 22 are arranged in the cylinder 1 through the stroke frame 621. The upper stroke switch 622 and the lower stroke switch 623 are respectively arranged on the upper and lower sides of the stroke frame 621. The limit block 624 is located between the upper stroke switch 622 and the lower stroke switch 623 and is arranged on the coupling screw 22; the stroke switch 622 is connected to the Hall element 612.

[0037] The reduction motor 21 is fixed to the motor seat 213 by the motor screw 212. The motor seat 213 is screwed to the upper end of the travel frame by threaded connection, and the two are prevented from rotating by screws. The part of the coupling screw 22 where the magnetic steel 611 is installed is limited between the motor seat 213 and the travel frame 621, and can rotate freely but is not allowed to move axially, so as to ensure the accuracy of the feedback position of the limit block 624.

[0038] A Hall element 612 is installed at the upper end of the travel frame 621 at a position corresponding to the magnetic steel 611 . When the coupling screw 22 rotates, the number of rotations and the approximate angle can be recorded through the induction of the magnetic steel 611 and the Hall element 612 .

[0039] The motor output shaft 211 of the reduction motor 21 extends into the tail end of the coupling screw 22 and rotates with it. When the coupling screw 22 rotates, the limit block 624 will move up and down. After adjustment, when the limit block 624 contacts the upper travel switch 622, the water spout is in the fully open position, and when the limit block 624 contacts the lower travel switch 622, the water spout is in the fully closed position. The thread of the coupling screw 22 only transmits motion but not force, so its pitch can be set to a small pitch (for example, 1 mm) to shorten the length.

[0040] The opening adjustment mechanism 3 includes a transmission screw 31 and a thrust rod 32. The upper end of the transmission screw 31 is connected to the coupling screw 22 of the rear end screw transmission assembly 2, and the lower end is connected to the thrust rod 3. The thrust rod 3 changes the conduction state of the water outlet 52 by moving up and down.

[0041] The transmission screw 31 is also provided with a thrust bearing 311, which bears the axial force generated when the transmission screw 31 moves. The thread of the transmission screw 31 is a trapezoidal thread with a large gap, which can compensate for the coaxiality error of each part. The transmission screw 31 and the coupling screw 22 rotate together with the motor output shaft 211 of the reduction motor 21.

[0042] A balanced pressure chamber 4 is formed between the transmission screw 31 and the cylinder 1, the upper end of the thrust rod 32 is sleeved on the transmission screw 31 and a first air chamber 321 is formed between the two, and a second air chamber 322 is formed between the thrust rod 32 and the cylinder 1, and the first air chamber 321 and the second air chamber 322 are connected through the vent hole 323 on the thrust rod 32.

[0043] A first sealing ring 33 is disposed between the thrust rod 32 and the driving screw 31 , and a second sealing ring 34 and a third sealing ring 35 are disposed between the thrust rod 32 and the cylinder body 1 at upper and lower sides of the second air cavity 322 .

[0044] The thrust rod 32 is located at the lower side of the third sealing ring 35 and is sequentially sleeved with a pressure ring 36 and an anti-scouring sleeve 37 and a pressure sleeve 38 is provided at the end. The cylinder 1 is located at the lower side of the water outlet 52 and is provided with a faucet sealing ring 39. The lower end of the cylinder 1 is provided with a water inlet joint 11.

[0045] The middle of the thrust rod 32 is processed with a trapezoidal female buckle, which forms a screw transmission pair with the transmission screw 31.

[0046] When the lower end of the thrust rod 32 enters the water nozzle sealing ring 39, the water nozzle is in a fully closed state (such as Figure 1 ), when the thrust rod 32 escapes from the faucet sealing ring 39 and moves upward, the flow rate is adjusted by changing the blocking size of the water outlet 52, and when it moves to the top and completely unblocks the water outlet 52, the faucet is in a fully closed state.

[0047] like Figure 2 As shown, the diameter of the sealed portion of the cylinder 1 and the thrust rod 32 is d1, the diameter of the lower end of the thrust rod 32 is d2, and the annular area of ​​the second air cavity 322 is S1. The equivalent areas of the three must be equal, that is:

[0048]

[0049] The present invention uses two air cavities to balance the pressure difference force on the adjustable water nozzle underground, thereby reducing the motor load. The two air cavities are both located at the rear end of the water outlet 52, so that the water inlet 51 can be directly located at the front end of the water nozzle to form a straight-through flow channel, greatly reducing the risk of sand jamming.

[0050] When the water spout adjustment command is given, the main control circuit controls the reduction motor 21 to rotate forward, the motor output shaft 211 drives the coupling screw 22 and the transmission screw 31 to rotate, and the thrust rod 32 moves upward to open the water spout. When the coupling screw 22 rotates, the magnet 611 passes through the Hall element 612, and a count value is recorded to calculate the opening of the water spout. When the thrust rod 32 moves, the downhole liquid enters the balance pressure chamber 4 from the balance pressure hole 53, and all parts are in a balance pressure state. The transmission screw 31 is fully sealed, and the water flows according to Figure 3 The flow path shown is direct outflow.

[0051] When the limit block 624 hits the upper travel switch 621, the water nozzle is in a fully open state, stops moving, and resets the count value of the Hall element 612 to eliminate the transmission cumulative error.

[0052] When the water tap is closed or the flow rate is reduced, the reduction motor 21 is controlled to rotate in the reverse direction, and the action process is similar to that of opening the water tap.

[0053] When the faucet nipple is under external pressure, no matter how it reciprocates, its various components are in a balanced pressure state and do not bear additional pressure difference force, thereby reducing the force on the screw and the load on the motor.

[0054] When the faucet is working, water flows in from the water inlet joint 11 at the bottom and is discharged from the water outlet 52. There are no parts blocking the entire flow channel, and there is no structure such as a neck annulus that is prone to blockage, which greatly reduces the risk of blockage.

[0055] Even if the air cavity seal leaks, the first sealing ring 33, the second sealing ring 34, and the third sealing ring 35 perform secondary sealing, and the liquid will not flow into the instrument; at the same time, since the first air cavity 321 and the second air cavity 322 are interconnected, they can accommodate more liquid, and minor leakage will not affect the normal operation of the instrument.

[0056] The flow passage of the present invention has a large area and can be used in an environment with a large flow rate.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A straight-through balanced pressure adjustable water faucet, which is arranged on one side of the lower joint and is used to control the conduction state between the water inlet and the water outlet, characterized in that: The water nozzle comprises a cylinder, a rear end screw transmission assembly, and an opening adjustment mechanism; the rear end screw transmission assembly and the opening adjustment mechanism are arranged in the cylinder in order from top to bottom along the axial direction, and a balanced pressure chamber is arranged between the cylinder and the opening adjustment mechanism, and the balanced pressure chamber is connected with the central channel of the lower joint through the pressure guide hole on the cylinder and the balanced pressure hole at the corresponding position on the lower joint; the opening adjustment mechanism is connected with the rear end screw transmission assembly, and is used for moving up and down under the drive of the rear end screw transmission assembly to change the conduction state between the water inlet and the water outlet; The opening adjustment mechanism includes a transmission screw and a thrust rod. The upper end of the transmission screw is connected to the coupling screw of the rear end screw transmission assembly, and the lower end is connected to the thrust rod. The thrust rod changes the conduction state of the water outlet by moving up and down. A balanced pressure chamber is formed between the transmission screw and the cylinder. The upper end of the thrust rod is sleeved on the transmission screw and a first air chamber is formed between the two. A second air chamber is formed between the thrust rod and the cylinder. The first air chamber and the second air chamber are connected through the vent hole on the thrust rod. The diameter of the sealing part of the cylinder and the thrust rod is d1, the diameter of the lower end of the thrust rod is d2, and the annular area of ​​the second air chamber is S1. The equivalent areas of the three are equal, that is: ; When the thrust rod moves, the downhole liquid enters the balanced pressure chamber from the balanced pressure hole, and all components are in a balanced pressure state.

2. The straight-through balanced pressure adjustable faucet according to claim 1, characterized in that: The rear end lead screw transmission assembly comprises a reduction motor and a coupling lead screw. The motor output shaft of the reduction motor is connected to the coupling lead screw, and the coupling lead screw is connected to the opening adjustment mechanism.

3. The straight-through balanced pressure adjustable faucet according to claim 2, characterized in that: It also includes an opening counting component, which is arranged between the cylinder and the rear end screw transmission component and is used to count the number of forward or reverse rotations of the rear end screw transmission component and determine the current opening.

4. The straight-through balanced pressure adjustable faucet according to claim 3 is characterized in that: The opening counting component includes a circle counting module and a stroke control module. The circle counting module is arranged at the upper end of the connecting screw and is used to sense and record the number of rotation circles and approximate angle of the connecting screw. The stroke control module is arranged on the upper and lower sides of the connecting screw and is used to determine whether the conduction state between the water inlet and the water outlet is fully open or fully closed. The stroke control module is also connected to the circle counting module and is used to send a reset instruction to the circle counting module when the conduction state between the water inlet and the water outlet is fully open.

5. The straight-through balanced pressure adjustable faucet according to claim 4, characterized in that: The circle counting module includes a magnet and a Hall element. The magnet is arranged on the side wall of the upper end of the coupling screw, and the Hall element is arranged on the cylinder.

6. The straight-through balanced pressure adjustable faucet according to claim 5, characterized in that: The stroke control module includes a stroke frame, an upper stroke switch, a lower stroke switch, and a limit block. The upper and lower ends of the coupling screw are arranged in the cylinder through the stroke frame. The upper stroke switch and the lower stroke switch are respectively arranged on the upper and lower sides of the stroke frame. The limit block is located between the upper stroke switch and the lower stroke switch and is arranged on the coupling screw; the stroke switch is connected to the Hall element.

7. The straight-through balanced pressure adjustable faucet according to claim 6, characterized in that: A first sealing ring is arranged between the thrust rod and the transmission screw, and a second sealing ring and a third sealing ring are arranged between the thrust rod and the cylinder at upper and lower sides of the second air cavity, respectively.

8. The straight-through balanced pressure adjustable faucet according to claim 7, characterized in that: The thrust rod is located at the lower side of the third sealing ring and is sequentially sleeved with a pressure ring, an anti-scouring sleeve and a pressure sleeve at the end; the cylinder is located at the lower side of the water outlet and is provided with a water nozzle sealing ring; the lower end of the cylinder is provided with a water inlet joint.

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