A bridge-type concentric integrated water distributor and water distribution method thereof

Abstract

The present invention proposes a bridge-type concentric integrated water distributor, comprising: an upper connecting tube, a main body tube, a constant flow regulating sleeve and a concentric movable tube, wherein the upper connecting head, the upper connecting tube, the main body tube and the lower connecting head are connected in sequence, a main channel, a bridge channel and a water distribution channel are arranged in the main body tube, an eccentric shaft is arranged in the water distribution channel, a central water outlet is arranged between the main body channel and the water distribution channel, and an external water outlet is arranged on the outer wall of the main body tube of the water distribution channel; the constant flow regulating sleeve is arranged between the central water outlet and the external water outlet in the water distribution channel, an inner water outlet is arranged on the side wall of the constant flow regulating sleeve, the inner thread of the constant flow regulating sleeve is fitted with a linkage water nozzle, one end of the linkage water nozzle is plugged with the eccentric shaft, and a flow channel is arranged between the side wall and the upper end face of the linkage water nozzle; the concentric movable tube is connected to the eccentric shaft in a transmission manner. The present invention also proposes a bridge-type concentric integrated water distribution method, which is implemented by using the bridge-type concentric integrated water distributor described above.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield fine water injection, and in particular relates to a bridge-type concentric integrated water distributor and a water distribution method thereof. Background Art

[0002] In combination with the needs of reservoir development and changes in water injection well types, Changqing Oilfield independently developed a bridge-type concentric stratified water injection technology, which achieved concentric test adjustment and greatly improved the success rate and efficiency of test adjustment. However, affected by factors such as changes in reservoir water absorption capacity and pressure fluctuations in the ground system, the stratified flow rate changes quickly after manual test adjustment. Due to the inability to discover in time for later test adjustment, the stratified flow rate has been unable to meet the design injection requirements for a long time, which has restricted the water drive development effect of the reservoir. Through on-site tracking, it was found that the pressure fluctuation range of the water injection system in some blocks was 0.7-4.0MPa, and the single-layer water injection volume of low-permeability reservoirs was mainly concentrated in 5-15 cubic meters / day. The pressure fluctuation had a significant impact on the stratified flow rate. At the same time, the ground system is mainly controlled by constant flow. When the pressure changes, the flow rate can only be adjusted to meet the full well injection requirements. The stratified flow rate cannot be adjusted in time to meet the injection requirements. Therefore, it is urgent to develop a water distributor that can automatically adjust the stratified flow rate underground to reduce the impact of pressure fluctuations on the stratified flow rate. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a bridge-type concentric integrated water distributor and a water distribution method thereof, so as to overcome the above-mentioned problems or at least partially solve or alleviate the above-mentioned problems.

[0004] The present invention provides a bridge-type concentric integrated water distributor, comprising:

[0005] An upper connecting tube, the upper portion of which is connected to an upper connecting head;

[0006] A main body tube, the main body tube is connected to the lower end of the upper connecting tube, the lower end of the main body tube is connected to a lower connecting head, a main body channel, a bridge channel and a water distribution channel are arranged in parallel in the main body tube, the upper end of the water distribution channel is blocked, an eccentric shaft is rotatably arranged at the lower end, a non-circular plug hole is arranged at the upper end of the eccentric shaft, a central water outlet is arranged between the main body channel and the water distribution channel, and an outgoing water outlet is arranged on the outer side wall of the water distribution channel and the main body tube;

[0007] A constant flow regulating sleeve, the constant flow regulating sleeve is axially slidably assembled in the water distribution channel and is located between the central water outlet and the external water outlet, an inner water outlet is arranged on the side wall of the constant flow regulating sleeve, a linkage water nozzle is arranged inside the constant flow regulating sleeve through a threaded sleeve, a non-circular insert is arranged at one end of the linkage water nozzle, the non-circular insert is directly connected with the non-circular plug hole on the eccentric shaft, and a flow channel is arranged between the side wall and the upper end surface of the linkage water nozzle;

[0008] A concentric movable cylinder, which is rotatably arranged between the interior of the lower connecting cylinder and the lower port of the main body channel in the main body cylinder, an adjustment groove is arranged on the side wall of the concentric movable cylinder, and the upper part of the concentric movable cylinder is drivingly connected to the eccentric shaft;

[0009] A positioning tube is connected to the edge of the upper port of the main body channel in the main body tube, the positioning tube extends into the upper connecting tube, and a positioning groove is arranged on the edge of the upper port of the positioning tube.

[0010] The present invention also has the following optional features.

[0011] Optionally, a concentric adjustment gear is provided on the side wall of the upper end of the concentric movable cylinder, an eccentric adjustment gear is provided on the eccentric shaft, the upper end of the concentric movable cylinder extends into the lower end of the main cylinder, and the concentric adjustment gear is meshed with the eccentric adjustment gear.

[0012] Optionally, the concentric adjustment gear and the concentric movable cylinder are an integrated structure.

[0013] Optionally, a constant current support seat is fixed in the upper port of the water distribution channel, and a compression spring is arranged between the constant current support seat and the constant current adjustment sleeve.

[0014] Optionally, a non-round rod is provided at the inner end of the constant current support seat, the compression spring is sleeved on the non-round rod, a non-round through hole is provided at the upper end of the constant current adjustment sleeve, and the non-round rod extends into the non-round through hole.

[0015] Optionally, the cross section of the water distribution channel is non-circular, and the cross-sectional profile of the constant flow regulating sleeve matches the water distribution channel.

[0016] Optionally, a stabilizing sleeve is provided on the inner side of the upper connecting head, and the inner diameter of the stabilizing sleeve is equal to the inner diameter of the positioning tube.

[0017] Optionally, support ribs are provided between the outer wall of the straightening sleeve and the inner wall of the upper connecting head.

[0018] The present invention also proposes a bridge-type concentric integrated water distribution method, comprising the following steps:

[0019] S001: Connect the bridge-type concentric integrated water distributor to the oil well casing and lower it into the predetermined position in the oil well along with the oil well casing;

[0020] S002: Use the cable well testing vehicle to lower the test instrument into the position of the bridge-type concentric integrated water distributor in the oil well casing, so that the positioning claw on the test instrument is connected with the positioning groove on the positioning cylinder, and the adjustment claw on the test instrument is connected with the adjustment groove in the concentric movable cylinder;

[0021] S003: Sending instructions through the ground control system causes the adjustment claw on the test instrument to drive the concentric movable cylinder to rotate, and the concentric movable cylinder drives the eccentric shaft and the linkage water nozzle to rotate in situ. When the linkage water nozzle rotates, the thread pushes the constant flow adjustment sleeve to slide axially in the water distribution channel. When the constant flow adjustment sleeve slides to the preset position, the flow passage in the linkage water nozzle connects the central water outlet in the main tube and the outflow outlet outside the main tube, so that the bridge-type concentric integrated water distributor injects water into the oil well;

[0022] S004: When the stratified flow rate reaches the injection requirement, stop the operation and remove the test instrument.

[0023] Beneficial effects of the present invention:

[0024] The bridge-type concentric integrated water distributor and the water distribution method thereof of the present invention drives the eccentric shaft and the linkage water nozzle to rotate through the concentric movable cylinder, and pushes the constant flow regulating sleeve to move in the water distribution channel through the thread between the linkage water nozzle and the constant flow regulating sleeve, thereby controlling the flow passage in the linkage water nozzle to be connected with the main channel and the well, thereby realizing the water distribution function, and can regulate the stratified flow in the oil well. At the same time, the constant flow regulating sleeve and the linkage water nozzle are also affected by the pressure in the main channel and the well to realize the automatic pressure balance adjustment function, which can reduce the increase and decrease amplitude of the stratified water volume and reduce the influence of pressure fluctuations on the stratified flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the full cross-section structure of the bridge-type concentric integrated water distributor of the present invention;

[0026] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the main tube at AA.

[0027] In the above figure: 1 upper connecting cylinder; 2 upper connecting head; 201 supporting rib; 3 main cylinder; 301 main channel; 302 bridge channel; 303 water distribution channel; 304 central water outlet; 305 external water outlet; 4 lower connecting head; 5 eccentric shaft; 501 eccentric adjustment gear; 6 constant flow adjustment sleeve; 601 internal water outlet; 7 linkage water nozzle; 701 non-circular insert; 702 flow channel; 8 concentric movable cylinder; 801 adjustment groove; 802 concentric adjustment gear; 9 positioning cylinder; 901 positioning groove; 10 constant flow support seat; 1001 non-circular rod; 11 compression spring; 12 straightening sleeve.

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] Example 1

[0030] refer to Figure 1 and Figure 2 The embodiment of the present invention proposes a bridge-type concentric integrated water distributor, comprising: an upper connecting tube 1, a main body tube 3, a constant flow regulating sleeve 6, a concentric movable tube 8 and a positioning tube 9, wherein the upper part of the upper connecting tube 1 is connected with an upper connecting head 2; the main body tube 3 is connected to the lower end of the upper connecting tube 1, and the lower end of the main body tube 3 is connected with a lower connecting tube 4, and a main channel 301, a bridge channel 302 and a water distribution channel 303 are arranged in parallel in the main body tube 3, the upper end of the water distribution channel 303 is blocked, and an eccentric shaft 5 is rotatably arranged at the lower end, and a non-circular jack is arranged at the upper end of the eccentric shaft 5, a central water outlet 304 is arranged between the main channel 301 and the water distribution channel 303, and an outgoing water outlet 305 is arranged on the outer side wall of the water distribution channel 303 and the main body tube 3; the constant flow regulating sleeve 6 is axially slidably assembled in the water distribution channel 303, and is located at the central water outlet Between the outlet 304 and the external water outlet 305, an inner water outlet 601 is arranged on the side wall of the constant flow regulating sleeve 6, and a linkage water nozzle 7 is arranged inside the constant flow regulating sleeve 6 through a threaded sleeve, and a non-circular insert 701 is arranged at one end of the linkage water nozzle 7, and the non-circular insert 701 is directly plugged into the non-circular plug hole on the eccentric shaft 5, and a flow channel 702 is arranged between the side wall and the upper end surface of the linkage water nozzle 7; the concentric movable cylinder 8 is rotatably arranged between the interior of the lower connecting cylinder 4 and the lower port of the main channel 301 in the main cylinder 3, and an adjustment groove 801 is arranged on the side wall of the concentric movable cylinder 8, and the upper part of the concentric movable cylinder 8 is drivingly connected with the eccentric shaft 5; the positioning cylinder 9 is connected to the edge of the upper port of the main channel 301 in the main cylinder 3, and the positioning cylinder 9 extends into the upper connecting cylinder 1, and the edge of the upper port of the positioning cylinder 9 is provided with a positioning groove 901.

[0031] The bridge-type concentric integrated water distributor of the present invention is connected to the oil well casing through an upper connector 2 and a lower connector 4. An upper connecting tube 1 and a main body tube 3 are connected between the upper connector 2 and the lower connector 4 from top to bottom. The main body tube 3 has a main channel 301 at the axis center. The inner diameter of the main channel 301 is smaller than the inner diameters of the upper connector 2, the upper connecting tube 1 and the lower connector 4. A concentric movable tube 8 is rotatably arranged between the lower port of the main channel 301 and the lower connector 4. A plurality of bridge-type channels 302 and a water distribution channel 303 are also arranged in parallel around the main channel 301. The upper and lower ends of each bridge-type channel 302 are respectively connected to the upper connector 2 and the lower connector 4. When the adjusting claw of the test instrument passes through the main channel 301 and cooperates with the concentric movable tube 8, the liquid flow between the upper connector 2 and the lower connector 4 can flow through the bridge-type channel 302 without being blocked.

[0032] The test instrument is lowered into the bridge-type concentric integrated water distributor in the oil well casing, and the positioning claw of the test instrument is docked with the positioning groove 901 on the positioning cylinder 9 to provide anti-reversal force for test adjustment. After the adjustment claw of the test instrument is docked with the adjustment groove 801 on the concentric movable cylinder 8, the concentric movable cylinder 8 is driven to rotate, and the concentric movable cylinder 8 drives the eccentric shaft 5 in the water distribution channel 303 to rotate, and the eccentric shaft 5 drives the linkage water nozzle 7 to rotate in situ. At this time, the thread between the linkage water nozzle 7 and the constant flow adjustment sleeve 6 will push the constant flow adjustment sleeve 6 to move. Since the overflow channel 702 is provided between the side wall and the upper end face of the linkage water nozzle 7, when the linkage When the water nozzle 7 is relatively rotated out of the constant flow regulating sleeve 6 for a section, the constant flow regulating sleeve 6 slides in the water distribution channel 303. When the port of the flow channel 702 on the side wall of the linkage water nozzle 7 exposes the lower port of the constant flow regulating sleeve 6, the flow channel 702 begins to communicate with the central water outlet 304. At the same time, the inner water outlet 601 on the side wall of the constant flow regulating sleeve 6 coincides with the outer water outlet 305 on the main tube 3, so that the flow channel 702 is communicated with the well. At this time, the liquid flow in the oil well casing can pass through the central water outlet 304, the flow channel 702, the inner water outlet 601 and the outer water outlet 305 to perform stratified water injection on the oil well.

[0033] During the stratified water injection process, when the pressure of the surface water injection system rises, the water pressure inside the oil well casing will push the linkage water nozzle 7 and the constant flow regulating sleeve 6 to move upward at the same time. At this time, the non-circular insert 701 at the lower end of the linkage water nozzle 7 is pulled out of the non-circular plug hole on the eccentric shaft 5 for a distance, and at the same time, the overlapping area of ​​the inner water outlet 601 on the constant flow regulating sleeve 6 and the outer water outlet 305 on the main tube 3 is reduced, so that the throttling pressure difference is increased, and the increase range of the stratified water injection amount is reduced, thereby reducing the stratified water injection pressure fluctuation; when the pressure of the surface water injection system decreases, the compression spring 11 will push the constant flow regulating sleeve 6 and the linkage water nozzle 7 to move downward. At this time, the non-circular insert 701 at the lower end of the linkage water nozzle 7 will retract into the non-circular plug hole on the eccentric shaft 5 for a distance, and at the same time, the overlapping area of ​​the inner water outlet 601 on the constant flow regulating sleeve 6 and the outer water outlet 305 on the main tube 3 is increased, so that the throttling pressure difference is reduced, the decrease range of the stratified water injection amount is reduced, thereby reducing the stratified water injection pressure fluctuation.

[0034] When the adjusting claw of the testing instrument drives the concentric movable cylinder 8 to rotate in the opposite direction, the eccentric shaft 5 is driven to rotate in the opposite direction, and at the same time, the water nozzle 7 is driven and linked to be screwed into the constant flow regulating sleeve 6. At this time, the flow passage 702 is closed, and the stratified water injection is ended.

[0035] Example 2

[0036] refer to Figure 1 On the basis of Example 1, a concentric adjustment gear 802 is provided on the side wall of the upper end of the concentric movable cylinder 8, and an eccentric adjustment gear 501 is provided on the eccentric shaft 5. The upper end of the concentric movable cylinder 8 extends into the lower end of the main cylinder 3, and the concentric adjustment gear 802 is meshed with the eccentric adjustment gear 501.

[0037] When the adjusting claw in the test instrument drives the concentric movable cylinder 8 to rotate, the concentric movable cylinder 8 engages with the eccentric adjusting gear 501 through the concentric adjusting gear 802 to drive the eccentric shaft 5 and the linkage water nozzle 7 to rotate, thereby controlling the sliding of the constant flow adjusting sleeve 6.

[0038] Example 3

[0039] refer to Figure 1 On the basis of Example 2, the concentric adjustment gear 802 and the concentric movable cylinder 8 are an integrated structure.

[0040] The concentric movable cylinder 8 is a hollow cylindrical structure, and the concentric adjustment gear 802 is processed on the shaft shoulder of the concentric movable cylinder 8.

[0041] Example 4

[0042] refer to Figure 1 On the basis of Example 1, a constant current support seat 10 is fixed in the upper port of the water distribution channel 303, and a compression spring 11 is arranged between the constant current support seat 10 and the constant current adjustment sleeve 6.

[0043] The constant current support seat 10 is fixed at the upper port of the water distribution channel 303. The compression spring 11 between the constant current support seat 10 and the constant current adjustment sleeve 6 pushes the constant current adjustment sleeve 6 downward, so that the constant current adjustment sleeve 6 can automatically reset after being subjected to the pressure of the water injection system, and will not stay in the pressure dead corner at the upper end of the water distribution channel 303.

[0044] Example 5

[0045] refer to Figure 1 On the basis of Example 4, a non-round rod 1001 is provided at the inner end of the constant current support seat 10, the compression spring 11 is sleeved on the non-round rod 1001, and a non-round through hole is provided at the upper end of the constant current adjustment sleeve 6, and the non-round through hole 1001 extends into the non-round through hole.

[0046] The constant current support seat 10 is fixed in the water distribution channel 303. The constant current support seat 10 itself cannot rotate. At the same time, it can slide with the non-circular through hole on the constant current adjustment sleeve 6 through the non-circular rod 1001 to prevent the constant current adjustment sleeve 6 from rotating, so that it can only slide along the water distribution channel 303, preventing the internal water outlet 601 on the constant current adjustment sleeve 6 from circumferentially coinciding with the external water outlet 305 on the main tube 3.

[0047] Example 6

[0048] On the basis of Example 4, the cross section of the water distribution channel 303 is non-circular, and the cross-sectional profile of the constant flow regulating sleeve 6 matches the water distribution channel 303 .

[0049] If the constant flow regulating sleeve 6 produces rotational displacement, the inner water outlet 601 on the constant flow regulating sleeve 6 and the outer water outlet 305 on the main tube 3 will be staggered, and water volume regulation cannot be achieved. Therefore, the cross-sections of the constant flow regulating sleeve 6 and the water distribution channel 303 are both non-circular, so that the constant flow regulating sleeve 6 cannot rotate in the water distribution channel 303.

[0050] Example 7

[0051] On the basis of Example 1, a stabilizing sleeve 12 is provided on the inner side of the upper connecting head 2 , and the inner diameter of the stabilizing sleeve 12 is equal to the inner diameter of the positioning tube 9 .

[0052] The inner diameter of the straightening sleeve 12 is equal to the inner diameter of the positioning tube 9, and can align the positioning claws and the adjusting claws on the test instrument inserted into the upper connector 2 of the bridge-type concentric integrated water distributor, so that it can smoothly enter the upper port of the positioning tube 9, and finally smoothly cooperate with the positioning groove 901 on the positioning tube 9 and the adjusting groove 801 on the concentric movable tube 8 respectively.

[0053] Example 8

[0054] refer to Figure 1 On the basis of Example 7, a support rib 201 is provided between the outer wall of the straightening sleeve 12 and the inner wall of the upper connecting head 2.

[0055] When the righting claw and the adjusting claw in the test instrument pass through the righting sleeve 12 and cooperate with the positioning cylinder 9 and the concentric movable cylinder 8, the middle part of the righting sleeve 12 is temporarily blocked. In order not to affect the flow, a plurality of axially extending supporting ribs 201 are evenly arranged between the righting sleeve 12 and the upper connector 2. The righting sleeve 12 is fixed to the inner side of the upper connector 2 by the supporting ribs 201, so that an annular space is reserved between the righting sleeve 12 and the upper connector 2 for flow.

[0056] Example 9

[0057] The embodiment of the present invention provides a bridge-type concentric integrated water distribution method, comprising the following steps: S001: connecting the bridge-type concentric integrated water distributor to the oil well casing, and lowering the bridge-type concentric integrated water distributor into a predetermined position in the oil well along with the oil well casing; S002: lowering a test instrument into the oil well casing to the position of the bridge-type concentric integrated water distributor, so that the positioning claw on the test instrument is in contact with the positioning groove 901 on the positioning cylinder 9, and the adjusting claw on the test instrument is in contact with the adjusting groove 801 in the concentric movable cylinder 8; S003: sending a command through a ground control system so that the test instrument The adjusting claw on the test instrument drives the concentric movable cylinder 8 to rotate, and the concentric movable cylinder 8 drives the eccentric shaft 5 and the linked water nozzle 7 to rotate in place. When the linked water nozzle 7 rotates, the thread pushes the constant flow adjustment sleeve 6 to slide axially in the water distribution channel 303. When the constant flow adjustment sleeve 6 slides to the preset position, the flow channel 702 in the linked water nozzle 7 connects the central water outlet 304 in the main tube 3 with the outflow outlet 305 outside the main tube 3, so that the bridge-type concentric integrated water distributor can inject water into the oil well; S004: When the stratified flow rate reaches the injection requirement, stop the operation and remove the test instrument.

[0058] In step S003, when the surface water injection pressure rises, the linked water nozzle 7 and the constant flow regulating sleeve 6 move upward in the water distribution channel 303, the overlapping surface between the inner water outlet 601 and the outer water outlet 305 becomes smaller, the throttling pressure difference increases, and the increase in the stratified water injection amount decreases; when the surface water injection pressure decreases, the linked water nozzle 7 and the constant flow regulating sleeve 6 move downward in the water distribution channel 303, the overlapping surface between the inner water outlet 601 and the outer water outlet 305 becomes larger, the throttling pressure difference decreases, and the decrease in the stratified water injection amount decreases.

[0059] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A bridge-type concentric integrated water distributor, characterized in that: include: An upper connecting tube (1), the upper portion of the upper connecting tube (1) being connected to an upper connecting head (2); A main body tube (3), the main body tube (3) being connected to the lower end of the upper connecting tube (1), the lower end of the main body tube (3) being connected to a lower connecting head (4), the main body tube (3) having a main channel (301), a bridge channel (302) and a water distribution channel (303) arranged in parallel in the main body tube (3), the upper end of the water distribution channel (303) being blocked, and an eccentric shaft (5) being rotatably arranged at the lower end, the upper end of the eccentric shaft (5) being provided with a non-circular plug hole, a central water outlet (304) being provided between the main body channel (301) and the water distribution channel (303), and an external water outlet (305) being provided on the outer side wall of the water distribution channel (303) and the main body tube (3); A constant flow regulating sleeve (6), the constant flow regulating sleeve (6) is axially slidably assembled in the water distribution channel (303) and is located between the central water outlet (304) and the external water outlet (305); a compression spring (11) is directly arranged between the upper end of the constant flow regulating sleeve (6) and the water distribution channel (303); an inner water outlet (601) is arranged on the side wall of the constant flow regulating sleeve (6); a linkage water nozzle (7) is threadedly sleeved inside the constant flow regulating sleeve (6); a non-circular insert (701) is arranged at one end of the linkage water nozzle (7); the non-circular insert (701) is directly plug-connected to the non-circular plug hole on the eccentric shaft (5); and a flow channel (702) is arranged between the side wall and the upper end surface of the linkage water nozzle (7); a concentric movable cylinder (8), the concentric movable cylinder (8) being rotatably arranged between the interior of the lower connecting head (4) and the lower end of the main body passage (301) in the main body cylinder (3), an adjustment groove (801) being arranged on the side wall of the concentric movable cylinder (8), and the upper portion of the concentric movable cylinder (8) being drivingly connected to the eccentric shaft (5); A positioning tube (9), the positioning tube (9) being connected to the edge of the upper port of the main body channel (301) in the main body tube (3), the positioning tube (9) extending into the upper connecting tube (1), and a positioning groove (901) being provided at the edge of the upper port of the positioning tube (9); A constant current support seat (10) is fixed in the upper port of the water distribution channel (303), and the compression spring (11) is located between the constant current support seat (10) and the constant current adjustment sleeve (6); The inner end of the constant current support seat (10) is provided with a non-round rod (1001), the compression spring (11) is sleeved on the non-round rod (1001), the upper end of the constant current adjustment sleeve (6) is provided with a non-round through hole, and the non-round rod (1001) extends into the non-round through hole; The cross section of the water distribution channel (303) is non-circular, and the cross-sectional profile of the constant flow regulating sleeve (6) matches the water distribution channel (303).

2. The bridge-type concentric integrated water distributor according to claim 1, characterized in that: A concentric adjustment gear (802) is provided on the side wall of the upper end of the concentric movable cylinder (8), and an eccentric adjustment gear (501) is provided on the eccentric shaft (5). The upper end of the concentric movable cylinder (8) extends into the lower end of the main cylinder (3), and the concentric adjustment gear (802) meshes with the eccentric adjustment gear (501).

3. The bridge-type concentric integrated water distributor according to claim 2, characterized in that: The concentric adjustment gear (802) and the concentric movable cylinder (8) are an integrated structure.

4. The bridge-type concentric integrated water distributor according to claim 1, characterized in that: A stabilizing sleeve (12) is provided on the inner side of the upper connecting head (2), and the inner diameter of the stabilizing sleeve (12) is equal to the inner diameter of the positioning tube (9).

5. The bridge-type concentric integrated water distributor according to claim 4, characterized in that: Support ribs (201) are provided between the outer side wall of the straightening sleeve (12) and the inner side wall of the upper connecting head (2).

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