A throttling one-way valve

Abstract

The present invention discloses a throttling one-way valve, which relates to the technical field of throttling one-way valves. The present invention comprises two groups of valve bodies, wherein a ball valve cavity is provided inside the valve body, a magnet cavity is provided on the inner wall of the ball valve cavity, a switching magnet is fixedly installed inside the magnet cavity, and the opposite surfaces of the switching magnets in the two groups of valve bodies have opposite magnetic properties. A ball valve core is rotatably installed inside the ball valve cavity, and a throttling valve hole and a one-way valve hole are provided inside the ball valve core. Two groups of one-way valve rings are provided inside the one-way valve hole, and a one-way valve core is provided inside the two groups of one-way valve rings. Four groups of connecting spring bars are provided on the outside of the one-way valve core, and the four groups of connecting spring bars are distributed circumferentially. A hinge is provided on the end of the connecting spring bar away from the one-way valve core. The present invention adopts a multifunctional integrated design, which not only integrates the needs of multiple valves, saves space and cost, but also solves the problem of difficult maintenance in a small space.

Description

Technical Field

[0001] The present invention relates to the technical field of throttling one-way valves, in particular to a throttling one-way valve. Background Art

[0002] Throttling check valves are used in circuits where flow control in one direction is required while unimpeded flow in the other (reverse) direction is required. This allows for adjustable speed of the actuator in the forward direction while allowing for rapid retraction in the reverse direction. They are often used to control the speed of cylinders and are therefore also called speed control valves. These valves are commonly used in hydraulic, pneumatic, and various fluid control systems, primarily to control fluid flow direction and precisely regulate flow. Throttling check valves have a wide range of applications in industrial applications, offering significant advantages in scenarios requiring flow regulation and unidirectional flow control.

[0003] In a Chinese patent (publication number: CN210290871U), a throttling one-way valve is disclosed, including a one-way valve assembly and an adjusting assembly; the one-way valve assembly includes a valve body, a valve seat, a one-way valve core, a spring, and an oil inlet; a valve hole is provided inside the valve body, and multiple oil inlets are provided below the valve body, and the multiple oil inlets are connected to each other. A valve seat, a one-way valve core, and a spring are provided inside the valve body, and the valve seat is received in the valve hole and fixedly installed in the valve body. A one-way valve core is provided above the valve seat, and the one-way valve core is received in the valve hole, and the one-way valve core is pressed against the inner surface of the valve body. And it is in sliding contact with it, and the lower side of the one-way valve core rests on the valve seat; the one-way valve core is hollow, and a spring is accommodated in the one-way valve core, and the spring rests on the inner surface of the one-way valve core; the adjusting assembly includes a fixed seat, a push rod, and a screw rod; the push rod is cross-shaped, one end of the spring is sleeved on the push rod, the push rod rests on the inner surface of the valve body and is in sliding contact with it, and the screw rod rests on the top of the push rod; the fixed seat is arranged above the valve body, one end of the fixed seat is accommodated in the valve hole and is fixed on the valve body, the fixed seat is hollow, and the push rod and screw rod are accommodated in the fixed seat.

[0004] This patent and the prior art have the following technical problems in actual use:

[0005] 1. In small equipment or precision control systems, flow control accuracy requirements are usually high. Existing throttling check valves may not be able to provide sufficiently accurate flow regulation in some cases, especially in the regulation of small flows, where the design and adjustment range of the throttling orifice are limited.

[0006] 2. Since the throttling check valve needs to control the fluid in a specific direction, if it is installed in an improper position or in the wrong direction, it will cause the fluid to flow in the opposite direction, damaging the valve and other components of the system, especially in places with small spaces or difficult to access, which can easily lead to the incorrect installation direction of the valve.

[0007] 3. Since the throttling check valve needs to control the fluid in a specific direction, the throttling direction of the throttling check valve is fixed after installation, and the control direction cannot be changed during subsequent use. When the flow direction of the pipeline changes, the throttling check valve can only be disassembled and reinstalled for adjustment, which is inconvenient to modify.

[0008] 4. The working principle of the throttling check valve relies on the fluid passing through a smaller aperture or channel, which can easily cause particles, impurities, etc. to clog the valve, especially in fluids containing solid particles or sticky substances. This causes the valve to need to be disassembled and cleaned regularly, and maintenance in a small space is difficult. Summary of the Invention

[0009] The purpose of the present invention is to solve the above problems and provide a throttling one-way valve.

[0010] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0011] A throttling check valve comprises two valve bodies, wherein a ball valve cavity is defined within the valve bodies, a magnet cavity is defined within the inner wall of the ball valve cavity, a switching magnet is fixedly mounted within the magnet cavity, and the opposing surfaces of the switching magnets in the two valve bodies have opposite magnetic properties. A ball valve core is rotatably mounted within the ball valve cavity, and a throttling valve hole and a check valve hole are formed through the ball valve core;

[0012] A throttle plate that can be raised and lowered is installed inside the throttle valve hole, and two groups of one-way valve rings are provided inside the one-way valve hole, and the two groups of one-way valve rings are located at the one-way valve hole port, and a one-way valve core is provided inside the two groups of one-way valve rings, and four groups of connecting elastic bars are provided on the outside of the one-way valve core, and the four groups of connecting elastic bars are distributed in a circle, and a hinge is provided at the end of the connecting elastic bar away from the one-way valve core, and the hinge is hinged to the inner wall of the one-way valve hole, and an inner magnetic block is provided on the side of the one-way valve core close to the one-way valve hole port.

[0013] Furthermore, an upper sealing sleeve is provided on the top of the valve body, a valve shaft is provided on the top of the ball valve core, a guide groove is provided on the outside of the valve shaft, the internal sealing thread of the upper sealing sleeve is connected with an adjusting screw sleeve, the inner wall of the adjusting screw sleeve is provided with a transmission protrusion, the adjusting screw sleeve is sleeved on the outside of the valve shaft, and the transmission protrusion is inserted in the guide groove.

[0014] Furthermore, a transmission chamber is opened at the top of the ball valve core, the valve shaft is fixedly installed on the top of the transmission chamber, the internal thread of the valve shaft is connected to a throttling adjustment shaft rod, the bottom end of the throttling adjustment shaft rod extends into the transmission chamber, and a connecting piece is rotatably installed at the bottom of the throttling adjustment shaft rod, and the throttle plate is fixedly installed at the bottom of the connecting piece.

[0015] Furthermore, an adjusting chamber is provided at the inner top of the throttle valve hole, the throttle plate can be sealed and accommodated in the adjusting chamber, the adjusting chamber is communicated with the transmission chamber, and the adjusting chamber and the transmission chamber are sealed by a sealing block.

[0016] Furthermore, an indicator rod is fixedly installed on the top of the valve shaft, and the axis of the indicator rod is parallel to the axes of the throttle valve hole and the one-way valve hole.

[0017] Furthermore, an indicator roller is rotatably mounted on the bottom of the indicator rod, and indicator arrows are provided on both sides of the indicator roller, with the two groups of indicator arrows pointing in opposite directions.

[0018] Furthermore, a gear is fixedly installed on the side of the indicator roller close to the valve shaft, a slide rail is provided on the outside of the indicator frame rod, the bottom of the slide rail is slidably connected to a gear rod, the gear rod is engaged with the gear, and a limit baffle is provided on the top of the two groups of valve bodies.

[0019] Furthermore, slots are provided on the tops of the two groups of valve bodies, and the limiting baffles are tightly inserted into the slots.

[0020] Furthermore, two sealing rings are provided on the inner wall of the ball valve cavity, and the two sealing rings seal the ball valve core and the ball valve cavity.

[0021] The beneficial effects of the present invention are as follows:

[0022] The present invention arranges the throttle valve hole and the one-way valve hole in the ball valve core, and can combine the flow control characteristic of the ball valve with the throttle valve hole to achieve dual flow control, thereby increasing the flow adjustment range and having a wide range of applications.

[0023] The present invention adopts the design of a two-way variable one-way valve hole. The ball valve drives the one-way valve core to approach different switching magnetic blocks. The two groups of switching magnetic blocks can respectively give suction or thrust to the one-way valve core through the inner magnetic block to realize the swing of the connecting elastic bar. The connecting elastic bar can press the one-way valve core onto the two groups of one-way valve rings, thereby realizing one-way switching, so that the valve can be installed in any orientation during installation. After the installation is completed, the direction can be switched. At the same time, in the subsequent pipeline modification process, there is no need to disassemble the valve, and the operation is convenient.

[0024] The present invention can realize control direction switching by directly rotating the ball valve 180°, and can also realize control direction switching by reciprocatingly rotating the ball valve 90°. Through the cooperation of dual control switching functions, the direction of the throttle valve hole can be changed without changing the flow direction, and then the internal components of the throttle valve hole can be self-cleaned by liquid backwashing. This can be carried out directly in the flow pipeline without disassembling the valve, and is suitable for maintenance in a small space.

[0025] In summary, the present invention adopts a multifunctional integrated design, which not only integrates the needs of multiple valves, saves space and cost, but also solves the problem of difficult maintenance in a small space. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is an overall exploded view of the present invention;

[0028] Figure 3 This is an exploded view of the ball valve core of the present invention;

[0029] Figure 4 This is a schematic diagram of the cross-sectional structure of the ball valve core of the present invention;

[0030] Figure 5 This is a schematic diagram of the indicator rod structure of the present invention Figure 1 ;

[0031] Figure 6 This is a schematic diagram of the indicator rod structure of the present invention Figure 2 .

[0032] Figure markings: 1. Valve body; 11. Ball valve cavity; 12. Magnet cavity; 13. Switching magnet; 14. Upper sealing sleeve; 15. Limit baffle; 2. Ball valve core; 21. Transmission cavity; 22. Valve shaft; 23. Guide groove; 24. Adjusting screw sleeve; 25. Transmission protrusion; 3. Sealing ring; 4. Throttle valve hole; 41. Adjusting cavity; 42. Throttle plate; 43. Sealing block; 44. Throttle adjusting shaft; 45. Connecting part; 5. One-way valve hole; 51. One-way valve ring; 52. One-way valve core; 53. Hinge; 54. Connecting spring bar; 55. Inner magnet; 6. Indicator rack; 61. Indicator roller; 62. Gear; 63. Slide rail; 64. Gear rod. DETAILED DESCRIPTION

[0033] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] Example 1, as Figures 1-6 As shown, a throttling check valve comprises two valve bodies 1. A ball valve cavity 11 is defined within the valve body 1. A magnet cavity 12 is defined within the inner wall of the ball valve cavity 11. A switching magnet 13 is fixedly mounted within the magnet cavity 12. The opposing surfaces of the switching magnets 13 in the two valve bodies 1 have opposite magnetic properties. A ball valve core 2 is rotatably mounted within the ball valve cavity 11. A throttling valve hole 4 and a check valve hole 5 are defined within the ball valve core 2.

[0035] A throttle plate 42 that can be raised and lowered is installed inside the throttle valve hole 4, and two groups of one-way valve rings 51 are provided inside the one-way valve hole 5. The two groups of one-way valve rings 51 are located at the port of the one-way valve hole 5. A one-way valve core 52 is provided inside the two groups of one-way valve rings 51, and four groups of connecting elastic bars 54 are provided on the outside of the one-way valve core 52. The four groups of connecting elastic bars 54 are distributed in a circle, and a hinge 53 is provided at one end of the connecting elastic bar 54 away from the one-way valve core 52. The hinge 53 is hinged to the inner wall of the one-way valve hole 5, and an inner magnetic block 55 is provided on the side of the one-way valve core 52 close to the port of the one-way valve hole 5.

[0036] Two sealing rings 3 are provided on the inner wall of the ball valve cavity 11 , and the two sealing rings 3 seal the ball valve core 2 and the ball valve cavity 11 .

[0037] The initial state of the valve of the present invention is as shown in the attached figure. Figure 4 The status shown (the orientation of this paragraph refers to the attached Figure 4 ), the one-way valve core 52 is tightly pressed against the one-way valve ring 51 at the outer end under the action of the connecting spring bar 54, the inner magnetic block 55 is N-pole downward, the right end of the switching magnetic block 13 in the left valve body 1 is S-pole, and the left end of the switching magnetic block 13 in the right valve body 1 is N-pole;

[0038] During installation, the throttling check valve can be installed at any angle without paying attention to the control direction. After installation, two methods can be used to adjust the control direction: (1) directly rotate the ball valve core 2 180° to change the direction of the check valve hole 5, thereby changing the control direction. It should be noted that the ball valve core 2 drives the inner magnetic block 55 to pass through the switching magnetic block 13 in the left valve body 1, and the opposite poles attract each other, so that the check valve core 52 is still pressed tightly against the check valve ring 51 at the outer end;

[0039] Rotate the ball valve core 2 back and forth 90°, driving the inner magnetic block 55 to rotate toward the switching magnetic block 13 in the right valve body 1. Like magnets repel each other, and the one-way valve core 52 moves away from the outer one-way valve ring 51. The magnetic force is much greater than the elastic force of the connecting spring 54, causing the connecting spring 54 to swing back toward the inner one-way valve ring 51, thereby pressing the one-way valve core 52 against the inner one-way valve core 52. At this time, the flow control direction of the one-way valve hole 5 changes, but the direction of the one-way valve hole 5 remains unchanged. Two methods can be selected according to the actual operating environment.

[0040] When throttling is required, not only can the throttle plate 42 be controlled to descend to control the flow, but the ball valve core 2 can also be controlled to rotate to change the size of the inlet and outlet of the throttle valve hole 4. Through dual control, the adjustment range and adjustment accuracy are increased.

[0041] After the valve has been used for a period of time, the ball valve core 2 is first rotated 180° to change the direction of the throttle valve hole 4 and the one-way valve hole 5. It should be noted that the ball valve core 2 drives the inner magnetic block 55 to pass through the switching magnetic block 13 in the right valve body 1. Like poles repel each other, and the one-way valve core 52 moves away from the one-way valve ring 51 at the outer end. The magnetic force is much greater than the elastic force of the connecting spring bar 54, causing the connecting spring bar 54 to swing back to the one-way valve ring 51 on the inside, thereby pressing the one-way valve core 52 tightly against the one-way valve core 52 on the inside. At this time, the flow control direction of the one-way valve hole 5 changes. Since the direction of the one-way valve hole 5 also changes, the overall control direction of the valve does not change, and the normal use of the valve is not affected. However, the direction of the throttle valve hole 4 changes, so that the flow can backwash the position of the throttle plate 42. There is no need to disassemble the valve for maintenance, and it does not affect the normal operation of the pipeline. It is easy to use.

[0042] The multifunctional integrated design not only meets the needs of multiple valves, saves space and cost, but also solves the problem of difficult maintenance in a small space. It should be noted that the valve of the present invention is mainly used in small equipment or precision control systems in a download environment. The flow rate is small, and there is no need to connect the spring bar 54 with a large elastic force. Therefore, the magnetic force of the switching magnetic block 13 can be reduced accordingly, and the volume does not need to be set larger, which can meet the valve volume requirements. When the connecting spring bar 54 presses the one-way valve core 52, it is in a tilted top state. Therefore, at normal flow, the liquid pushes the one-way valve core 52 away from the one-way valve ring 51, and the connecting spring bar 54 only bends, but is not enough to swing to the other side. The magnetic force is much greater than the flow rate design. Therefore, under the push of the magnetic force, the one-way valve core 52 moves a long distance. The connecting spring bar 54 will not only bend, but also cause the hinge 53 to swing to the other side, thereby causing the connecting spring bar 54 to tilt to the other side to complete the one-way control switch. The specific changes are shown in the attached figure. Figure 4 shown.

[0043] Embodiment 2, on the basis of the above embodiment, further includes: an upper sealing sleeve 14 is provided on the top of the valve body 1, a valve shaft 22 is provided on the top of the ball valve core 2, a guide groove 23 is provided on the outer side of the valve shaft 22, the internal sealing thread of the upper sealing sleeve 14 is connected with an adjusting screw sleeve 24, the inner wall of the adjusting screw sleeve 24 is provided with a transmission protrusion 25, the adjusting screw sleeve 24 is sleeved on the outer side of the valve shaft 22, and the transmission protrusion 25 is inserted in the guide groove 23.

[0044] This embodiment is a control method for the ball valve core 2. By rotating the adjusting screw sleeve 24, the adjusting screw sleeve 24 spirally rises and falls in the upper sealing sleeve 14. The adjusting screw sleeve 24 drives the valve shaft 22 to rotate through the transmission protrusion 25 and the guide groove 23, and the valve shaft 22 drives the ball valve core 2 to rotate. Under the action of the self-locking thread of the adjusting screw sleeve 24 and the upper sealing sleeve 14, the overall stability of the ball valve core 2 can be ensured. It is suitable for environments where no adjustment is required, and the threaded connection can improve the sealing performance.

[0045] Embodiment three, based on the above embodiment, further includes: a transmission chamber 21 is opened at the top of the ball valve core 2, the valve shaft 22 is fixedly installed at the top of the transmission chamber 21, the internal thread of the valve shaft 22 is connected to a throttling adjustment shaft 44, the bottom end of the throttling adjustment shaft 44 extends into the transmission chamber 21, the bottom of the throttling adjustment shaft 44 is rotatably installed with a connecting piece 45, and the throttle plate 42 is fixedly installed at the bottom of the connecting piece 45.

[0046] This embodiment adopts the throttle plate 42 control mode, and the throttle adjustment shaft 44 is rotated. Under the action of the valve shaft 22, the throttle adjustment shaft 44 rotates downward, and the throttle adjustment shaft 44 drives the throttle plate 42 to descend through the connecting member 45 to perform throttling control, and the connecting member 45 only rises and falls with the throttle adjustment shaft 44, and does not rotate with the throttle adjustment shaft 44.

[0047] Embodiment 4, based on the above embodiment, further includes: an adjusting chamber 41 is opened at the inner top of the throttle valve hole 4, the throttle plate 42 can be sealed and accommodated in the adjusting chamber 41, the adjusting chamber 41 is connected to the transmission chamber 21, and the adjusting chamber 41 and the transmission chamber 21 are blocked by a sealing block 43.

[0048] Through this design, the sealing of the regulating chamber 41 can be ensured during transmission, and under the double sealing effect of the sealing block 43 and the valve shaft 22, the liquid will not flow out of the ball valve core 2.

[0049] Embodiment 5, based on the above embodiment, further includes: an indicator rod 6 is fixedly mounted on the top of the valve shaft 22 , and the axis of the indicator rod 6 is parallel to the axes of the throttle valve hole 4 and the one-way valve hole 5 .

[0050] An indicator roller 61 is rotatably mounted on the bottom of the indicator rack 6 , and indicator arrows are provided on both sides of the indicator roller 61 , with the two groups of indicator arrows pointing in opposite directions.

[0051] A gear 62 is fixedly installed on the side of the indicator roller 61 close to the valve shaft 22, and a slide rail 63 is provided on the outside of the indicator frame rod 6. The bottom of the slide rail 63 is slidably connected to a gear rod 64, which is engaged with the gear 62. A limit baffle 15 is provided on the top of the two groups of valve bodies 1.

[0052] Slots are provided on the tops of the two valve bodies 1, and the limiting baffles 15 are tightly inserted into the slots.

[0053] The flow direction of the one-way valve hole 5 can be determined by the indication of the indicator arrow. When the flow direction is adjusted by rotating the ball valve core 2 back and forth 90°, the ball valve core 2 drives the indicator rod 6 to rotate via the valve shaft 22. When the ball valve core 2 rotates 90°, the gear rod 64 hits the limit baffle 15. The gear rod 64 drives the indicator roller 61 to rotate 180° via the gear 62. The other side of the indicator roller 61 rotates in the opposite direction of the arrow to the front, thereby determining the one-way flow direction of the valve.

[0054] When the flow direction is adjusted by directly rotating the ball valve core 2 180°, the ball valve core 2 drives the indicator rack 6 to rotate through the valve shaft 22. When it rotates 90°, the gear rod 64 presses on the limit baffle 15, and the gear rod 64 drives the indicator roller 61 to rotate 180° through the gear 62. The reverse arrow on the other side of the indicator roller 61 rotates to the front, and the forward arrow surface is on the back. Then the limit baffle 15 is pulled out of the slot. When the ball valve core 2 continues to rotate 90°, it is equivalent to turning over the indicator roller 61, so the forward arrow surface faces the front, and the direction indicated by the forward arrow is the one-way flow direction of the valve.

[0055] When backwashing is required, first pull the limit baffle 15 out of the slot, which is equivalent to the indicator rod 6 directly driving the indicator roller 61 to rotate 180 degrees. The indicator roller 61 turns over, with the reverse arrow facing the front and the reverse arrow pointing to the original flow direction.

[0056] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A throttling one-way valve, comprising two sets of valve bodies (1), characterized in that: A ball valve cavity (11) is provided inside the valve body (1), a magnet cavity (12) is provided on the inner wall of the ball valve cavity (11), a switching magnet block (13) is fixedly installed inside the magnet cavity (12), and the opposing surfaces of the switching magnet blocks (13) in the two groups of valve bodies (1) have opposite magnetic properties. A ball valve core (2) is rotatably installed inside the ball valve cavity (11), and a throttle valve hole (4) and a one-way valve hole (5) are provided inside the ball valve core (2); A throttle plate (42) capable of being raised and lowered is installed inside the throttle valve hole (4), two groups of one-way valve rings (51) are provided inside the one-way valve hole (5), the two groups of one-way valve rings (51) are located at the port of the one-way valve hole (5), a one-way valve core (52) is provided inside the two groups of one-way valve rings (51), four groups of connecting spring bars (54) are provided on the outside of the one-way valve core (52), the four groups of connecting spring bars (54) are distributed in a circumference, a hinge (53) is provided at one end of the connecting spring bars (54) away from the one-way valve core (52), the hinge (53) is hinged to the inner wall of the one-way valve hole (5), and an inner magnetic block (55) is provided on the side of the one-way valve core (52) close to the port of the one-way valve hole (5).

2. A throttling check valve according to claim 1, characterized in that: An upper sealing sleeve (14) is provided on the top of the valve body (1), a valve shaft (22) is provided on the top of the ball valve core (2), a guide groove (23) is provided on the outer side of the valve shaft (22), an adjusting screw sleeve (24) is connected to the inner sealing thread of the upper sealing sleeve (14), a transmission protrusion (25) is provided on the inner wall of the adjusting screw sleeve (24), the adjusting screw sleeve (24) is sleeved on the outer side of the valve shaft (22), and the transmission protrusion (25) is inserted into the guide groove (23).

3. A throttling check valve according to claim 2, characterized in that: A transmission chamber (21) is formed at the top of the ball valve core (2), and a valve shaft (22) is fixedly mounted on the top of the transmission chamber (21). The internal thread of the valve shaft (22) is connected to a throttling adjustment shaft rod (44), and the bottom end of the throttling adjustment shaft rod (44) extends into the transmission chamber (21). A connecting piece (45) is rotatably mounted on the bottom of the throttling adjustment shaft rod (44), and a throttle plate (42) is fixedly mounted on the bottom of the connecting piece (45).

4. A throttling one-way valve according to claim 3, characterized in that: The inner top of the throttle valve hole (4) is provided with an adjusting chamber (41), and the throttle plate (42) can be sealed and received in the adjusting chamber (41). The adjusting chamber (41) is communicated with the transmission chamber (21), and the adjusting chamber (41) and the transmission chamber (21) are sealed by a sealing block (43).

5. A throttling one-way valve according to claim 4, characterized in that: An indicator rod (6) is fixedly mounted on the top of the valve shaft (22), and the axis of the indicator rod (6) is parallel to the axes of the throttle valve hole (4) and the one-way valve hole (5).

6. A throttling check valve according to claim 5, characterized in that: An indicating roller (61) is rotatably mounted on the bottom of the indicating rack (6), and indicating arrows are provided on both sides of the indicating roller (61), with the two groups of indicating arrows pointing in opposite directions.

7. A throttling one-way valve according to claim 6, characterized in that: A gear (62) is fixedly mounted on one side of the indicating roller (61) close to the valve shaft (22), a slide rail (63) is provided on the outer side of the indicating frame rod (6), a gear rod (64) is slidably connected to the bottom of the slide rail (63), and the gear rod (64) is meshed with the gear (62), and a limit baffle (15) is provided on the top of the two groups of valve bodies (1).

8. A throttling one-way valve according to claim 7, characterized in that: Slots are provided on the tops of the two groups of valve bodies (1), and the limiting baffles (15) are tightly inserted into the slots.

9. A throttling one-way valve according to any one of claims 1 to 8, characterized in that: Two sealing rings (3) are provided on the inner wall of the ball valve cavity (11), and the two sealing rings (3) seal the ball valve core (2) and the ball valve cavity (11).

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