A circumferential rotation valve control mechanism

Abstract

The application discloses a circumferential rotation valve control mechanism, a water passage is arranged on the side wall of a flow guide pipe, a water hole is arranged on the side wall of a sealing pipe, the flow guide pipe and the sealing pipe are circumferentially fixed and the water passage and the water hole are communicated, the weight of a slow valve is greater than that of a fast valve, and slow valve arc-shaped water channels and fast valve arc-shaped water channels are arranged on the lower ends of the slow valve and the fast valve, the slow valve and the fast valve can relatively rotate and make the slow valve arc-shaped water channels and the fast valve arc-shaped water channels communicated or not communicated, the side walls of the slow valve and the fast valve are both provided with communication channels, a limiting key is fixed on the side wall of a sealing core shaft, the limiting key can extend through the two communication channels and be limited on the inner wall of the sealing pipe, the upper end and the lower end of the sealing core shaft are connected with an upper cover and a lower cover respectively, the sealing pipe, the slow valve and the fast valve are all limited between the upper cover and the lower cover, the inner passage of the sealing core shaft can be communicated with the cavity on one side of the limiting key, and the lower end of the inner passage of the sealing core shaft can be communicated with the outside. The circumferential rotation valve control mechanism can realize more efficient and high-frequency water channel switching.

Description

Technical Field

[0001] This invention relates to the field of oil and gas drilling technology, specifically to a circumferentially rotating valve control mechanism. Background Technology

[0002] Existing suction-operated valve control mechanisms use axial differential movement between valve bodies to open and close the flow channel, achieving periodic pressure changes in the upper chamber. During this process, under the influence of the valve body's gravity, when the valve control mechanism's axis is at a certain angle to the horizontal plane, friction between the valve bodies can cause jamming, making differential movement difficult and preventing the valve control mechanism from starting. Simultaneously, the large displacement generated by the axial displacement of the valve control mechanism's lateral area affects the opening and closing cycle, limiting its frequency.

[0003] Therefore, key water circuit control mechanisms, such as jet valves, core valves, and plunger valves, used in deep drilling to accelerate and enhance drilling efficiency, suffer from problems including poor erosion resistance, sensitivity to structural dimensional defects, and sensitivity to well deviation. There is an urgent need to provide a valve control mechanism to overcome these technical deficiencies and achieve more efficient, high-frequency water circuit switching, applicable to the development of high-frequency hydraulic oscillators and high-frequency hydraulic hammers. Summary of the Invention

[0004] The purpose of this invention is to provide a circumferential rotation valve control mechanism to solve the problems existing in the prior art and to achieve more efficient and high-frequency water circuit switching.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a circumferentially rotating valve control mechanism, comprising, from the outside to the inside, an outer tube, a guide tube, a packer tube, a slow valve, a fast valve, and a packer mandrel. The guide tube has a water passage on its side wall that connects to the interior of the guide tube. The packer tube has a water passage hole on its side wall. The guide tube and the packer tube are circumferentially fixed, and the water passage connects to the water passage hole. The slow valve is heavier than the fast valve. The lower end of the slow valve is rotatably connected to the lower end of the fast valve. The lower end of the slow valve has a slow valve arc-shaped water channel, and the lower end of the fast valve has a fast valve arc-shaped water channel. The water passage connects to the slow valve arc-shaped water channel. The slow valve and the fast valve... The device is capable of relative rotation, allowing the slow valve arc-shaped water channel to connect or disconnect with the fast valve arc-shaped water channel. Both the slow valve and the fast valve have connecting channels on their sidewalls. A limit key is fixed to the sidewall of the packer mandrel. The limit key extends through the two connecting channels and is positioned on the inner wall of the packer tube, with a gap between the sidewall of the connecting channel and the limit key. An upper cover and a lower cover are connected to the upper and lower ends of the packer mandrel, respectively. The packer tube, the slow valve, and the fast valve are all positioned between the upper cover and the lower cover. The inner channel of the packer mandrel can connect to a chamber on one side of the limit key, and the lower end of the inner channel of the packer mandrel can connect to the outside.

[0007] Preferably, the slow valve includes a slow valve body and a slow valve flange. The lower end of the slow valve body is fixed to the slow valve flange. The slow valve body is hollow inside and has a connecting channel on its side wall that can connect to the inside of the slow valve body. The slow valve arc-shaped water channel is opened on the slow valve flange and can penetrate the slow valve flange. The slow valve arc-shaped water channel is concentric with the slow valve body.

[0008] Preferably, the quick valve includes a quick valve body and a quick valve flange. The lower end of the quick valve body is fixed to the quick valve flange. The quick valve body is hollow inside and has a connecting channel on its side wall that can connect to the inside of the quick valve body. The quick valve arc-shaped water channel is opened on the quick valve flange and can penetrate the quick valve flange. The quick valve arc-shaped water channel is concentric with the quick valve body.

[0009] Preferably, the slow valve flange is located above the fast valve flange, and a lower limiting groove is formed on the lower end face of the slow valve flange. An upper limiting groove is formed on the upper end face of the fast valve flange corresponding to the lower limiting groove. A thrust bearing is installed between the upper limiting groove and the lower limiting groove. A bottom limiting groove is formed on the lower end face of the fast valve flange, and a top limiting groove is formed on the upper end of the lower cover. The lower cover is located at the lower end of the fast valve flange, and a thrust bearing is installed between the bottom limiting groove and the top limiting groove. The arc of the fast valve arc water channel is 90°, and the arc of the slow valve arc water channel is 30°.

[0010] Preferably, the sidewall of the guide pipe is provided with two guide surfaces, the upper ends of the two guide surfaces extend to the upper end of the guide pipe, and the two guide surfaces are able to receive the fluid flowing down through the upper opening of the outer pipe. The lower ends of the two guide surfaces do not contact each other, and the gap formed between the lower ends of the two guide surfaces is connected to the upper end of the water passage, and the lower end of the water passage extends to the lower end of the guide pipe.

[0011] Preferably, the water passage is L-shaped and includes a longitudinal passage and a transverse passage. The upper end of the longitudinal passage is connected to the gap between the two guide surfaces, and the lower end of the longitudinal passage is connected to one end of the transverse passage.

[0012] Preferably, a keyway is provided on the inner wall of the sealing tube, and the limiting key can be embedded in the keyway, wherein the side wall of the limiting key is curved.

[0013] Preferably, the packer tube has multiple water passage holes, and the multiple water passage holes are arranged along the axial direction of the packer tube.

[0014] Preferably, the lower cover has a through hole at the position corresponding to the inner channel of the sealing mandrel, and the through hole can connect the inner channel of the sealing mandrel with the lower end opening of the outer tube.

[0015] Preferably, both the upper cover and the lower cover are fixed to the sealing mandrel by screws.

[0016] The present invention achieves the following technical effects compared to the prior art:

[0017] The circumferential rotating valve control mechanism provided by this invention has a water passage on the side wall of the guide pipe that connects to the inside of the guide pipe, and a water passage hole on the side wall of the packer pipe. The guide pipe and the packer pipe can be circumferentially fixed and the water passage is connected to the water passage hole. With the arrangement of the packer pipe and the packer mandrel, the fluid can generate a suction effect when passing through the water passage, thereby facilitating the actuation of the fast valve and the slow valve. The weight of the slow valve is greater than that of the fast valve. The lower end of the slow valve is rotatably connected to the lower end of the fast valve. The lower end of the slow valve has a slow valve arc-shaped water channel, and the lower end of the fast valve has... The valve has a fast-acting arc-shaped water channel. When subjected to a pressure difference, the weight difference causes the fast and slow valves to rotate at different speeds, resulting in relative rotation between them. This allows the slow-acting arc-shaped water channel to connect or disconnect with the fast-acting arc-shaped water channel, achieving different states of the circumferential rotation valve control mechanism. The water passage connects to the slow-acting arc-shaped water channel. Both the slow and fast valves have connecting channels on their side walls. A limit key is fixed to the side wall of the packer mandrel. The limit key extends through the two connecting channels and is confined to the inner wall of the packer tube. The side walls of the connecting channels and the limit key... There is a gap between the fluid and the limiting key. When the fluid passes through the water passage and forms entrainment, a pressure difference is formed between the chambers on both sides of the limiting key, which in turn drives the fast valve and the slow valve to rotate. The upper and lower ends of the sealing mandrel are respectively connected to the upper and lower covers, and the sealing tube, slow valve, and fast valve are all confined between the upper and lower covers to facilitate relative movement between the various structures. The internal channel of the sealing mandrel can communicate with the chamber on one side of the limiting key, and the lower end of the internal channel of the sealing mandrel can communicate with the outside. Through the above design, the axial differential under the entrainment action is changed to circumferential differential, which improves the relationship between the valve bodies. The friction is reduced, which controllably decreases the discharge required from valve closure to valve opening, improves the ability of the circumferential rotating valve control mechanism to cope with different well inclinations, and greatly increases the switching frequency of the circumferential rotating valve control mechanism. Moreover, compared with conventional axial differential suction valves that are directly exposed in the fluid flow channel and cause the fluid to directly erode the surfaces of the mating moving pairs between the valve bodies, this invention uses a design structure that encapsulates the fast valve and the slow valve with a packer tube and a packer mandrel, which avoids the direct erosion of the rotating pairs between the fast valve and the slow valve by high-speed fluid and improves the service life of the valve body. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the circumferential rotation valve control mechanism provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the installation of the fast valve and the slow valve in this invention;

[0021] Figure 3 This is a schematic diagram of the flow guide tube in this invention;

[0022] Figure 4 This is a schematic diagram of the packer tube in this invention;

[0023] Figure 5 This is a schematic diagram of the slow valve in this invention;

[0024] Figure 6 yes Figure 5 Top view;

[0025] Figure 7 This is a schematic diagram of the fast valve in this invention;

[0026] Figure 8 yes Figure 7 Top view;

[0027] Figure 9 This is a top view of the circumferential rotation valve control mechanism in the present invention when it is in the (a) return valve state;

[0028] Figure 10 This is a top view of the circumferential rotating valve control mechanism in the present invention when it is in the (b) water hammer state;

[0029] Figure 11 This is a top view of the circumferential rotation valve control mechanism in the present invention when it is in the (c) push valve state;

[0030] Figure 12 This is a top view of the circumferential rotation valve control mechanism in the present invention when it is in the (d) return valve state;

[0031] In the diagram: 100 - Circumferential rotating valve control mechanism, 1 - Outer pipe, 2 - Guide pipe, 21 - Guide surface, 22 - Water passage, 3 - Top cover, 4 - Seal pipe, 41 - Water passage hole, 42 - Keyway, 5 - Slow valve, 51 - Slow valve body, 52 - Slow valve flange, 53 - Slow valve arc-shaped waterway, 6 - Fast valve, 61 - Fast valve body, 62 - Fast valve flange, 63 - Fast valve arc-shaped waterway, 64 - Upper limit groove, 65 - Lower arc-shaped end face, 7 - Seal mandrel, 71 - Limit key, 72 - Limit surface, 73 - First chamber, 74 - Second chamber, 8 - Thrust bearing, 9 - Lower cover, 10 - Screw. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The purpose of this invention is to provide a circumferential rotating valve control mechanism to solve the technical problems of existing valve control mechanisms, such as wear resistance, erosion, and low switching frequency.

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1-8As shown, this embodiment provides a circumferentially rotating valve control mechanism 100, including an outer tube 1, a guide tube 2, a packer tube 4, a slow valve 5, a fast valve 6, and a packer spindle 7, which are sequentially arranged from the outside to the inside. The inner wall of the outer tube 1 and the outer wall of the guide tube 2 can be configured to be interference-fitted, and both are provided with limiting step surfaces. The two limiting step surfaces can be arranged vertically and overlapped to achieve the limiting function. A water passage 22 that can connect to the inside of the guide tube 2 is opened on the side wall, so that when the fluid flows down through the opening at the upper end of the outer tube 1, it can enter the water passage 22. A water passage hole 41 is opened on the side wall of the packer tube 4. The guide tube 2 and the packer tube 4 can be circumferentially fixed by means of hole-shaft interference fit, etc., and the water passage 22 is connected to the water passage hole 41. The placement of the mandrel 7 allows for a suction effect when fluid passes through the water passage 22, creating a pressure drop in the first chamber 73. This facilitates the actuation of the fast valve 6 and the slow valve 5. The slow valve 5 is heavier than the fast valve 6, resulting in a lower rotational speed for the slow valve 5 compared to the fast valve 6. The lower end of the slow valve 5 is rotatably connected to the lower end of the fast valve 6. The lower end of the slow valve 5 has a slow valve arc-shaped water channel 53, and the lower end of the fast valve 6 has a fast valve arc-shaped water channel 63. The water passage 22 connects to the slow valve arc-shaped water channel 53. Therefore, under pressure differential, the weight difference causes the fast valve 6 and the slow valve 5 to rotate at different speeds, resulting in relative rotation between them. This allows the slow valve arc-shaped water channel 53 to connect or disconnect from the fast valve arc-shaped water channel 63, achieving the non-circular rotation of the valve control mechanism 100. In the same state, slow valve 5 and fast valve 6 can rotate relative to each other, allowing the arc-shaped water channel 53 of the slow valve to connect or disconnect with the arc-shaped water channel 63 of the fast valve. Both slow valve 5 and fast valve 6 have connecting channels on their side walls. A limit key 71 is fixed to the side wall of the packer spindle 7. The limit key 71 extends through the two connecting channels and is confined to the inner wall of the packer tube 4. There is a gap between the side wall of the connecting channel and the limit key 71. When fluid passes through the water passage 22 and forms a suction effect, a pressure difference is formed between the two chambers of the limit key 71 (i.e., the first chamber 73 and the second chamber 74 formed between the two end faces of the connecting channel and the outer wall and limit surface 72 of the limit key 71), thereby pushing the fast valve 6 and slow valve 5 to rotate. The upper and lower ends of the packer spindle 7 are respectively connected to the upper cover 3 and the lower cover 9, and the packer tube 4... Both the slow valve 5 and the fast valve 6 are confined between the upper cover 3 and the lower cover 9 to facilitate relative movement between the various structures. The lower end face of the upper cover 3 contacts the upper end faces of the sealing mandrel 7, fast valve 6, slow valve 5, and sealing tube 4. The upper end faces of the fast valve 6 and slow valve 5 are clearance-fitted with the lower end face of the upper cover 3. A limiting step surface is also provided on the inner wall of the guide tube 2, allowing part of the outer edge of the upper cover 3 to be confined at the limiting step surface. The inner channel of the sealing mandrel 7 can communicate with the second chamber 74, and the lower end of the inner channel of the sealing mandrel 7 can communicate with the outside. Through this design, the axial differential motion under the suction effect is changed to circumferential differential motion, improving the friction between valve bodies, alleviating the direct erosion of the valve body by the fluid, and controllably reducing the discharge volume required from valve closure to valve opening.This improves the ability of the circumferential rotary valve control mechanism 100 to cope with different well inclinations and significantly increases its switching frequency and service life.

[0036] Specifically, the slow valve 5 includes a slow valve body 51 and a slow valve flange 52. The lower end of the slow valve body 51 is fixed to the slow valve flange 52. The slow valve body 51 is hollow inside and has a connecting channel on its side wall that connects to the interior of the slow valve body 51. The slow valve arc-shaped water channel 53 is formed on the slow valve flange 52 and can penetrate the slow valve flange 52 to facilitate fluid passage. The slow valve arc-shaped water channel 53 is concentric with the slow valve body 51. The lower ends of the packer pipe 4 and the guide pipe 2 are both clearance-fitted with the upper end of the slow valve flange 52 to reduce friction during rotation.

[0037] The quick-acting valve 6 includes a quick-acting valve body 61 and a quick-acting valve flange 62. The lower end of the quick-acting valve body 61 is fixed to the quick-acting valve flange 62. The quick-acting valve body 61 is hollow inside, and a connecting channel is opened on its side wall to connect to the interior of the quick-acting valve body 61. The quick-acting valve arc-shaped water channel 63 is opened on the quick-acting valve flange 62 and can penetrate the quick-acting valve flange 62 to facilitate fluid passage. The quick-acting valve arc-shaped water channel 63 is concentric with the quick-acting valve body 61. The lower end face of the quick-acting valve flange 62 is clearance-fitted with the upper end face of the lower cover 9 and is limited by the thrust bearing 8 between the quick-acting valve flange 62 and the lower cover 9.

[0038] The outer cylindrical surfaces of the slow valve flange 52 and the fast valve flange 62 are both fitted with the inner wall of the outer pipe 1 with a clearance fit. The inner and outer cylindrical surfaces of the slow valve body 51, the inner and outer cylindrical surfaces of the fast valve body 61, the inner cylindrical surface of the packer pipe 4, and the outer cylindrical surface of the packer mandrel 7 are fitted with a clearance fit. The slow valve body 51 is sleeved on the outer periphery of the fast valve body 61. The slow valve flange 52 is located on the upper end of the fast valve flange 62, and a lower limit groove is opened on the lower end face of the slow valve flange 52, which corresponds to the upper end face of the fast valve flange 62. An upper limit groove 64 is provided at the lower limit groove position, and a thrust bearing 8 is installed between the upper limit groove 64 and the lower limit groove to achieve stable relative rotation of the fast valve 6 and the slow valve 5. A bottom limit groove is provided on the lower end face of the fast valve flange 62, and a top limit groove is provided on the upper end of the lower cover 9. The lower cover 9 is located at the lower end of the fast valve flange 62, and a thrust bearing 8 is installed between the bottom limit groove and the top limit groove to achieve stable rotation of the fast valve 6 relative to the lower cover 9. The end faces of the fast valve 6, the slow valve 5, and the lower cover 9 are all clearance fit. The arc of the fast valve arc water channel 63 is 90°, and the arc of the slow valve arc water channel 53 is 30°. In the actual design process, those skilled in the art can make adaptive changes to the arc of the fast valve arc water channel 63 and the slow valve arc water channel 53 according to actual needs.

[0039] Two guide surfaces 21 are provided on the side wall of the guide pipe 2. The guide surfaces 21 are arc-shaped curved surfaces formed at the upper end of the guide pipe 2. From top to bottom, the two guide surfaces 21 gradually approach each other, that is, the opening formed between the two guide surfaces 21 gradually decreases. The upper ends of the two guide surfaces 21 extend to the upper end of the guide pipe 2. The two guide surfaces 21 can receive the fluid flowing down through the upper opening of the outer pipe 1. The lower ends of the two guide surfaces 21 do not contact each other, and the gap formed between the lower ends of the two guide surfaces 21 is connected to the upper end of the water passage 22. This allows the fluid flowing down through the guide surfaces 21 to enter the water passage 22. The lower end of the water passage 22 extends to the lower end of the guide pipe 2, so that the fluid can flow into the slow valve arc-shaped water channel 53 through the lower end of the water channel 22.

[0040] The water passage 22 is L-shaped and includes a longitudinal channel and a transverse channel. The upper end of the longitudinal channel is connected to the gap between the two guide surfaces 21, and the lower end of the longitudinal channel is connected to one end of the transverse channel. By using the L-shaped water passage 22 in conjunction with the circumferential rotary valve design, the requirements for the suction effect are reduced, which improves the sensitivity of the circumferential rotary valve control mechanism 100 in starting and the requirements for the starting flow rate.

[0041] A keyway 42 is provided on the inner wall of the packer tube 4. The limiting key 71 can be embedded in the keyway 42 to achieve circumferential positioning of the packer tube 4 and the packer spindle 7. The side wall of the limiting key 71 is curved, and two limiting surfaces 72 are provided on both sides of the limiting key 71. The two limiting surfaces 72 on the same side are used to limit the end faces of the two connecting channels during the rotation of the fast valve 6 and the slow valve 5.

[0042] There are multiple water passage holes 41 on the packer pipe 4, and the multiple water passage holes 41 are arranged along the axial direction of the packer pipe 4.

[0043] The lower cover 9 has a through hole at the position corresponding to the inner channel of the sealing mandrel 7. The through hole can connect the inner channel of the sealing mandrel 7 with the lower opening of the outer tube 1 to realize the flow of fluid.

[0044] Both the upper cover 3 and the lower cover 9 are fixed to the sealing mandrel 7 by screws 10. In the actual installation process, the number of screws 10 can be selected according to actual needs to ensure a stable connection.

[0045] The lower edge of the limiting key 71 of the sealing mandrel 7 is in clearance fit with the upper end face of the slow valve flange 52 and the lower arc-shaped end face 65 of the connecting channel, and the above-mentioned clearance fit is achieved and adjusted by adjusting the axial length of the sealing mandrel 7.

[0046] In the circumferential rotating valve control mechanism 100 provided in this embodiment, the external flow fluid flows in from the inlet at the upper end of the outer pipe 1, flows along the guide surface 21 of the guide pipe 2, flows into the water passage 22, then enters the slow valve arc water passage 53, then enters the fast valve arc water passage 63, and finally flows out from the outlet at the lower end of the outer pipe 1.

[0047] The fluid in the inner channel flows out of the first chamber 73 through the water passage 41, and at the same time flows into the second chamber 74 from the outlet at the lower end of the outer tube 1, the through hole of the lower cover 9, and the inner channel of the sealing mandrel 7. Alternatively, the fluid in the inner channel flows into the first chamber 73 through the water passage 41, and at the same time flows out of the second chamber 74 from the inner channel of the sealing mandrel 7, the through hole of the lower cover 9, and the outlet at the lower end of the outer tube 1.

[0048] The working process of the circumferential rotation valve control mechanism 100 provided in this embodiment is as follows:

[0049] (a) Return valve: such as Figure 9 As shown, when the slow valve arc-shaped water channel 53 and the fast valve arc-shaped water channel 63 are connected, the fluid flows in from the inlet of the outer pipe 1 and flows through the guide surface 21 and the water passage 22 in sequence, and flows out from the connection between the slow valve arc-shaped water channel 53 and the fast valve arc-shaped water channel 63. When the fluid flows through the longitudinal channel of the water channel 22, a low pressure is generated in the first chamber 73 connected to the water passage 41 of the sealing pipe 4 under the entrainment effect. The pressure difference between the second chamber 74 and the first chamber 73 drives the fast valve 6 and the slow valve 5 to rotate circumferentially. Since the fast valve 6 and the slow valve 5 have different masses, the fast valve 6 is lighter and rotates faster, while the slow valve 5 is heavier and rotates slower. During this process, the fluid flows into the second chamber 74 from the outlet at the lower end of the outer pipe 1, the through hole of the lower cover 9, and the channel inside the sealing mandrel 7, and flows into the water passage 22 from the first chamber 73.

[0050] (b) Water hammer: such as Figure 10 As shown, the fast valve 6 stops rotating after one side wall of the connecting channel contacts the limiting surface 72 of the limiting key 71. The slow valve 5 continues to rotate until the slow valve arc water channel 53 and the fast valve arc water channel 63 are completely misaligned, so that the external flow channel is closed and water hammer is generated. At this time, high pressure is generated in the first chamber 73 and the inlet of the connected external pipe 1.

[0051] (c) Push valve: such as Figure 11 As shown, after water hammer occurs, since the flow rate of fluid flowing into the inlet of the outer pipe 1 is constant, the fluid quickly fills the first chamber 73. The fluid in the second chamber 74 flows out to the lower end of the outer pipe 1 through the channel inside the sealing mandrel 7 and the through hole of the lower cover 9. Under the strong push of the fluid, both the fast valve 6 and the slow valve 5 rotate in the opposite direction to the return valve. The side wall of the connecting channel of the fast valve 6 contacts the limiting surface 72 of the limiting key 71 and stops first. The slow valve 5 continues to rotate until the arc-shaped water channel 53 of the slow valve and the arc-shaped water channel 63 of the fast valve are connected and the external flow channel is opened.

[0052] (d) Return valve: such as Figure 12As shown, after the outer flow channel is opened, under the suction effect, the pressure difference between the second chamber 74 and the first chamber 73 drives the fast valve 6 to rotate in the opposite direction to the push valve process (i.e., process c). At the same time, the force generated by this pressure difference causes the slow valve 5 to decelerate to zero and then accelerate in the opposite direction to the push valve process (i.e., process c), entering the next cycle.

[0053] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A circumferential rotary valve control mechanism characterized by: The application relates to a valve device for a water conservancy project, which comprises, from outside to inside, an outer pipe, a flow guide pipe, a packer, a slow valve, a fast valve and a packer shaft, a water passage is arranged on the lateral wall of the flow guide pipe and can communicate with the inside of the flow guide pipe, a water hole is arranged on the lateral wall of the packer, the flow guide pipe and the packer can be fixed in a circumferential direction and make the water passage communicate with the water hole, the weight of the slow valve is greater than that of the fast valve, the lower end of the slow valve is rotationally connected with the lower end of the fast valve, an arc-shaped water channel of the slow valve is arranged at the lower end of the slow valve, an arc-shaped water channel of the fast valve is arranged at the lower end of the fast valve, the water passage can communicate with the arc-shaped water channel of the slow valve, the slow valve and the fast valve can rotate relative to each other and make the arc-shaped water channel of the slow valve communicate with or not communicate with the arc-shaped water channel of the fast valve, a communication channel is arranged on the lateral wall of the slow valve and the fast valve, a limiting key is fixed on the lateral wall of the packer shaft, the limiting key can extend through the two communication channels and be limited on the inner wall of the packer, and there is a gap between the lateral wall of the communication channel and the limiting key, the upper end and the lower end of the packer shaft are respectively connected with an upper cover and a lower cover, and the packer, the slow valve and the fast valve are all limited between the upper cover and the lower cover, an inner channel of the packer shaft can communicate with a cavity on one side of the limiting key, and the lower end of the inner channel of the packer shaft can communicate with the outside.

2. The circumferential rotary valve control mechanism according to claim 1, characterized in that: The slow valve comprises a slow valve body and a slow valve flange, the lower end of the slow valve body is fixed on the slow valve flange, the inside of the slow valve body is hollow and the lateral wall of the slow valve body is provided with the communication channel which can communicate with the inside of the slow valve body, the arc-shaped water channel of the slow valve is arranged on the slow valve flange and can penetrate through the slow valve flange, and the arc-shaped water channel of the slow valve is concentric with the slow valve body.

3. The circumferential rotary valve control mechanism according to claim 2, characterized in that: The fast valve comprises a fast valve body and a fast valve flange, the lower end of the fast valve body is fixed on the fast valve flange, the inside of the fast valve body is hollow and the lateral wall of the fast valve body is provided with the communication channel which can communicate with the inside of the fast valve body, the arc-shaped water channel of the fast valve is arranged on the fast valve flange and can penetrate through the fast valve flange, and the arc-shaped water channel of the fast valve is concentric with the fast valve body.

4. The circumferential rotary valve control mechanism according to claim 3, characterized in that: The slow valve flange is located on the upper end of the fast valve flange, the lower end surface of the slow valve flange is provided with a lower limiting groove, the upper end surface of the fast valve flange is provided with an upper limiting groove corresponding to the position of the lower limiting groove, a thrust bearing is arranged between the upper limiting groove and the lower limiting groove, the lower end surface of the fast valve flange is provided with a bottom limiting groove, the upper end of the lower cover is provided with a top limiting groove, the lower cover is located on the lower end of the fast valve flange, a thrust bearing is arranged between the bottom limiting groove and the top limiting groove, the arc of the arc-shaped water channel of the fast valve is 90 DEG, and the arc of the arc-shaped water channel of the slow valve is 30 DEG.

5. The circumferential rotary valve control mechanism of claim 1, wherein: Two flow guide surfaces are arranged on the side wall of the flow guide pipe, the upper ends of the two flow guide surfaces extend to the upper end of the flow guide pipe, the two flow guide surfaces can receive fluid flowing through the upper end opening of the outer pipe, the lower ends of the two flow guide surfaces are not in contact, and a gap between the lower ends of the two flow guide surfaces is communicated with the upper end of the water passage, and the lower end of the water passage extends to the lower end of the flow guide pipe.

6. The circumferential rotary valve control mechanism according to claim 5, characterized in that: The water passage is L-shaped and includes a longitudinal passage and a transverse passage, the upper end of the longitudinal passage is communicated with the gap between the two flow guide surfaces, and the lower end of the longitudinal passage is communicated with one end of the transverse passage.

7. The circumferential rotary valve control mechanism of claim 1, wherein: A key groove is arranged on the inner wall of the packer, the limiting key can be embedded in the key groove, and the side wall of the limiting key is curved.

8. The circumferential rotary valve control mechanism of claim 1, wherein: The water passage holes on the packer are multiple, and the multiple water passage holes are arranged along the axial direction of the packer.

9. The circumferential rotary valve control mechanism of claim 1, wherein: A through hole is arranged on the lower cover at a position corresponding to the inner passage of the packer shaft, and the through hole can communicate the inner passage of the packer shaft with the lower end opening of the outer pipe.

10. The circumferential rotary valve control mechanism of claim 1, wherein: The upper cover and the lower cover are fixed on the packer shaft by screws.

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