Pressure reducing valve group and marine valve

Abstract

The invention relates to the technical field of valves for sewage treatment, in particular to a pressure reducing valve group and a marine valve, one end of a first adjusting valve controls the internal pressure of an adjusting cavity through an external air pressure assembly, the adjusting cavity is communicated with an adjusting pipe capable of adjusting the volume of the inner cavity through a communicating valve, and a second adjusting valve is arranged at the low-pressure end; one end of the second adjusting valve is communicated with the drainage end, and one end of the second adjusting valve controls opening and closing of the communicating valve through the driving assembly. Accordingly, the situation that sewage enters the valve adjusting position to cause structural pollution or blockage is avoided, the pressure reducing valve is matched with sewage treatment, meanwhile, a pair of adjusting valves is arranged, the pressure of sewage on the two sides of the valve set is expressed, and the purpose of accurately adjusting the pressure is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of valves for sewage treatment, in particular to a pressure reducing valve group and a marine valve. Background Art

[0002] During sewage treatment, especially sewage treatment on ships, sewage is usually temporarily stored. When a certain storage volume is reached, it will be discharged regularly or separated for treatment. However, due to the large storage volume of sewage and the fact that it will be pumped out by water pumps during the discharge process, the flow rate and water pressure of the sewage are relatively high, while the discharge flow rate or sewage treatment efficiency is relatively low. Therefore, it is necessary to throttle and reduce the pressure of the sewage so that it can be discharged safely.

[0003] A common solution is to install a pressure reducing valve group in the sewage discharge pipe. The principle of the pressure reducing valve is to set up a regulating chamber connected to the high-pressure end, use high-pressure water flow to control the opening and closing amplitude of the main valve, and set a regulating valve on the outside of the valve. The regulating valve connects the regulating chamber and the low-pressure end, and uses the pressure change at the low-pressure end to control the opening and closing of the regulating valve, thereby achieving the purpose of pressure reduction. By adjusting the valve stem of the regulating valve, precise control of the low-pressure discharge pressure can be achieved.

[0004] Therefore, the existing pressure reducing valve uses the change of water pressure to control the valve. However, for sewage treatment, there are a lot of impurities and suspended matter in the water flow. Draining the sewage into the valve cavity for precise adjustment will cause blockage of the cavity and pipeline, making it difficult to adapt to the reduced pressure transportation of sewage. Summary of the Invention

[0005] The object of the present invention is to provide a pressure reducing valve group and a marine valve to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A pressure reducing valve group comprises a pressure reducing valve and a regulating component for controlling the pressure of the pressure reducing valve, the pressure reducing valve comprising a valve seat and a valve cover, a valve stem for controlling opening and closing being installed on the valve cover, a regulating chamber for controlling the lifting height of the valve stem being provided in the valve cover, the two ends of the pressure reducing valve being connected to the water inlet end and the drainage end respectively, the side of the pressure reducing valve connected to the water inlet end is set as the high-pressure end, the side of the pressure reducing valve connected to the drainage end is set as the low-pressure end, a first regulating valve is provided on one side of the high-pressure end, one end of the first regulating valve is connected to the water inlet end, one end of the first regulating valve controls the internal pressure of the regulating chamber through an external air pressure component, the regulating chamber is connected to a regulating pipe with adjustable inner chamber volume through a connecting valve, a second regulating valve is provided on the low-pressure end, one end of the second regulating valve is connected to the drainage end, and one end of the second regulating valve controls the opening and closing of the connecting valve through a driving component.

[0008] Preferably, an inner seat is provided inside the valve seat, and the inner seat divides the inner cavity of the valve seat into a high-pressure inner cavity and a low-pressure inner cavity. A valve hole is provided on the inner seat, and the high-pressure inner cavity is connected to the water inlet end, and the low-pressure inner cavity is connected to the drainage end. A valve stem is elastically installed on the valve cover, and the lower end of the valve stem is provided with a valve core that cooperates with the valve hole to seal.

[0009] Preferably, an annular tray is provided between the valve cover and the valve seat, a rubber diaphragm is fixedly mounted on the tray, the gap between the rubber diaphragm and the valve cover is set as an adjusting chamber, the middle section of the valve stem is fixed on the rubber diaphragm, the valve core is fixed to one end of the valve stem, the other end of the valve stem extends into the adjusting chamber, and a first spring is pressed between the upper end of the valve stem and the inner wall of the adjusting chamber.

[0010] Preferably, the first regulating valve is provided with three groups of interfaces, namely a first input pipe, a first output pipe and a first pressure relief pipe. The first regulating valve can control the switching and connection of the three groups of interfaces. The first input pipe is connected to the water inlet end, the first pressure relief pipe is connected to the low-pressure inner cavity, and an output component is elastically mounted on the first output pipe. The air pressure component includes a folding tube, one end of the folding tube is connected to the inner cavity of the regulating cavity through the first air pipe, and the other end of the folding tube is pressed with the output component.

[0011] Preferably, the second regulating valve is provided with three groups of interfaces, namely a second input pipe, a second pressure relief pipe and a second output pipe. The second input pipe is connected to the low-pressure inner cavity, and the second pressure relief pipe is connected to the drainage end. The second regulating valve can control the switching connection of the three groups of interfaces. An output assembly is installed on the second output pipe. The driving assembly includes a rotating rod connected to the connecting valve regulating member and a gear plate connected to the output assembly. The end of the rotating rod is provided with a gear meshing with the gear plate. The rotation of the rotating rod can control the opening and closing of the connecting valve.

[0012] Preferably, the output assembly includes a piston rod, a second spring and an end cover, the piston at the end of the piston rod is slidably inserted into the inner cavity of the first output tube or the second output tube, the vertical rod of the piston rod passes through the end cover, the end cover is fixed on the port of the first output tube or the second output tube, the second spring is sleeved on the vertical rod of the piston rod, and the second spring is pressed between the piston and the end cover.

[0013] Preferably, the outer side of the first output pipe is fixedly connected to the first outer frame, one side of the folding tube is fixed to the first outer frame, and the other side of the folding tube is provided with a mounting plate facing the first output pipe port, and the mounting plate is provided with an external thread, and a pressure ball is provided at the end of the piston rod on the first output pipe, and the pressure ball is pressed on the mounting plate, and the pressure ball is fixed to the mounting plate through a connecting cover threadedly connected to the mounting plate.

[0014] Preferably, a second outer frame is fixedly connected to the outer side of the second output pipe, a T-shaped rod facing the port of the second output pipe is slidably inserted on the second outer frame, the T-shaped rod is fixedly connected to the end of the tooth plate, and the tooth plate is fixedly connected to the end of the piston rod of the second output pipe.

[0015] Preferably, the regulating chamber is connected to the lower end inner cavity of the regulating tube through the second air pipe and the connecting valve, and a screw hole cover with a screw hole is provided at the upper end of the regulating tube, and a piston block is provided in the inner cavity of the regulating tube. A screw rod is rotatably installed on the bearing at the upper end of the piston block, and the middle section of the screw rod passes through the screw hole cover and is rotatably connected with the screw hole thread of the screw hole cover.

[0016] A marine valve comprises the pressure reducing valve group.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention provides a pneumatically regulated structure with a hydraulically regulated mode on the basis of the existing pressure reducing valve, thereby preventing sewage from entering the valve adjustment position and causing pollution or blockage of the structure, making the pressure reducing valve suitable for sewage treatment. At the same time, a pair of regulating valves are provided to respectively express the sewage pressure on both sides of the valve group, thereby achieving the purpose of accurately regulating the pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 This is a schematic structural diagram of a first regulating valve according to the present invention;

[0021] Figure 3 This is a schematic structural diagram of a second regulating valve according to the present invention;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the first regulating valve of the present invention;

[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the second regulating valve of the present invention;

[0024] Figure 6 This is a schematic diagram of the three-dimensional structure of the connection between the second regulating valve and the connecting valve of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the connection between the second regulating valve and the regulating pipe of the present invention.

[0026] In the figure: 1, water inlet end; 2, water outlet end; 3, valve seat; 4, valve cover; 5, tray; 6, rubber diaphragm; 7, inner seat; 8, valve hole; 9, valve core; 10, high-pressure cavity; 11, low-pressure cavity; 12, valve stem; 13, first spring; 14, first regulating valve; 15, second regulating valve; 16, first air pipe; 17, first input pipe; 18, second air pipe; 19, regulating chamber; 20, second pressure relief pipe; 21, second Input pipe; 22. First output pipe; 23. First pressure relief pipe; 24. End cover; 25. Piston rod; 26. Pressure ball; 27. Connecting cover; 28. First outer frame; 29. ​​Folding pipe; 30. Second spring; 31. Tooth plate; 32. Second output pipe; 33. Second outer frame; 34. Adjusting pipe; 35. Connecting valve; 36. Piston block; 37. Screw; 38. Screw hole cover; 39. Rotating rod; 40. Gear; 41. T-bar. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1 to 7 , the present invention provides a technical solution:

[0029] A pressure reducing valve group, including a pressure reducing valve and a regulating component for controlling the pressure of the pressure reducing valve, the pressure reducing valve includes a valve seat 3 and a valve cover 4, a valve stem 12 for controlling opening and closing is installed on the valve cover 4, and an regulating chamber 19 for controlling the lifting height of the valve stem 12 is provided in the valve cover 4, the two ends of the pressure reducing valve are respectively connected to the water inlet end 1 and the drainage end 2, the side of the pressure reducing valve connected to the water inlet end 1 is set as the high-pressure end, and the side of the pressure reducing valve connected to the drainage end 2 is set as the low-pressure end, the interior of the valve seat 3 is provided with an inner seat 7, the inner seat 7 divides the inner cavity of the valve seat 3 into a high-pressure inner cavity 10 and a low-pressure inner cavity 11, the inner seat 7 is provided with a valve hole 8, the high-pressure inner cavity 1 0 is connected to the water inlet end 1, the low-pressure inner cavity 11 is connected to the drain end 2, a valve stem 12 is elastically mounted on the valve cover 4, the lower end of the valve stem 12 is provided with a valve core 9 that cooperates with the valve hole 8 to seal, a circular tray 5 is provided between the valve cover 4 and the valve seat 3, a rubber diaphragm 6 is fixedly mounted on the tray 5, the gap between the rubber diaphragm 6 and the valve cover 4 is set as an adjustment chamber 19, the middle section of the valve stem 12 is fixed on the rubber diaphragm 6, the valve core 9 is fixed to one end of the valve stem 12, the other end of the valve stem 12 extends into the adjustment chamber 19, and a first spring 13 is pressed between the upper end of the valve stem 12 and the inner wall of the adjustment chamber 19.

[0030] By setting the first spring 13, the elastic vertical installation of the valve stem 12 is realized, and the rubber diaphragm 6 is used to seal the regulating chamber 19. At the same time, the deformation of the rubber diaphragm 6 is adapted to the lifting and lowering adjustment of the valve stem 12. Under the pressure of the high-pressure end, the valve stem 12 overcomes the traction of the first spring 13 and moves downward, so that the valve core 9 blocks the valve hole 8, thereby closing the pressure reducing valve. When the internal pressure of the regulating chamber 19 decreases, the traction force of the first spring 13 is greater than the internal pressure of the regulating chamber 19, driving the valve stem 12 to rise, thereby opening the valve hole 8, and allowing the sewage in the high-pressure inner chamber 10 to flow into the low-pressure inner chamber 11.

[0031] A first regulating valve 14 is provided on the high-pressure end side, one end of the first regulating valve 14 is connected to the water inlet end 1, and one end of the first regulating valve 14 controls the internal pressure of the regulating chamber 19 through an external air pressure component. The first regulating valve 14 is provided with three groups of interfaces, namely a first input pipe 17, a first output pipe 22 and a first pressure relief pipe 23. The first regulating valve 14 can control the switching and connection of the three groups of interfaces. The first input pipe 17 is connected to the water inlet end 1, and the first pressure relief pipe 23 is connected to the low-pressure inner cavity 11. An output component is elastically installed on the first output pipe 22, and the air pressure component includes a folding tube 29. One end of the folding tube 29 is connected to the inner cavity of the regulating chamber 19 through the first air pipe 16, and the other end of the folding tube 29 is pressed with the output component.

[0032] The sewage from the high-pressure end enters the first regulating valve 14 through the first input pipe 17, driving the output assembly to extend outward, thereby squeezing the folded tube 29, causing the folded tube 29 to shrink and reduce its volume. The airflow enters the regulating chamber 19 along the first air pipe 16, causing the internal pressure of the regulating chamber 19 to increase, thereby causing the valve stem 12 to descend, thereby achieving the purpose of closing the pressure reducing valve.

[0033] The regulating chamber 19 is connected to the regulating tube 34 with adjustable inner chamber volume through the connecting valve 35. The low-pressure end is provided with a second regulating valve 15. One end of the second regulating valve 15 is connected to the drainage end 2. One end of the second regulating valve 15 controls the opening and closing of the connecting valve 35 through a driving component. The second regulating valve 15 is provided with three groups of interfaces, namely the second input pipe 21, the second pressure relief pipe 20 and the second output pipe 32. The second input pipe 21 is connected to the low-pressure inner chamber 11, and the second pressure relief pipe 20 is connected to the drainage end 2. The second regulating valve 15 can control the switching connection of the three groups of interfaces. An output component is installed on the second output pipe 32. The driving component includes a rotating rod 39 connected to the adjusting part of the connecting valve 35 and a gear plate 31 connected to the output component. The end of the rotating rod 39 is provided with a gear 40 meshing with the gear plate 31. The rotation of the rotating rod 39 can control the opening and closing of the connecting valve 35.

[0034] The sewage in the low-pressure inner cavity 11 enters the second regulating valve 15 through the second input pipe 21. At this time, the output assembly on the second output pipe 32 is driven under the action of pressure, so that the gear plate 31 engages with the gear 40, thereby achieving the purpose of controlling the opening and closing of the connecting valve 35. When the connecting valve 35 is opened, the air pressure in the regulating chamber 19 enters the regulating pipe 34, the internal pressure of the regulating chamber 19 decreases, the valve stem 12 rises, and the pressure reducing valve is opened.

[0035] Working principle: First, high-pressure sewage enters the first regulating valve 14 along the first input pipe 17, driving the output assembly to squeeze the folded tube 29, so that the internal pressure of the regulating chamber 19 increases, causing the valve stem 12 to drop, resulting in a smaller sewage pressure on the side of the low-pressure inner chamber 11. At this time, the internal pressure of the low-pressure inner chamber 11 cannot support the position of the output assembly on the second output pipe 32. The output assembly on the second output pipe 32 drops, causing the gear plate 31 to drive the gear 40 to rotate in the opposite direction, and then drive the rotating rod 39 to rotate and open the connecting valve 35, so that the regulating chamber 19 is connected with the regulating pipe 34, to achieve pressure relief in the regulating chamber 19, and the valve stem 12 rises, increasing the opening amplitude of the valve hole 8, so that the internal pressure on the side of the low-pressure inner chamber 11 gradually increases to the equilibrium position. If the pressure on the side of the low-pressure inner chamber 11 does not reach the specified value at this time, the volume of the regulating pipe 34 can be adjusted, thereby achieving the purpose of regulating the internal pressure of the regulating chamber 19 until the specified drainage pressure is reached.

[0036] When sewage discharge is stopped, switch the connecting interface of the regulating valve so that the output pipe is connected to the pressure relief pipe. The sewage in the output pipe is discharged by utilizing the pressure difference of the water pressure, ensuring the stability and internal cleanliness of the regulating valve when it is stationary, and avoiding sewage impurities from settling in the pipeline and causing pollution.

[0037] Example 2: Based on Example 1, the output assembly includes a piston rod 25, a second spring 30 and an end cover 24. The piston at the end of the piston rod 25 is slidably inserted into the inner cavity of the first output tube 22 or the second output tube 32. The vertical rod of the piston rod 25 passes through the end cover 24. The end cover 24 is fixed on the port of the first output tube 22 or the second output tube 32. The second spring 30 is sleeved on the vertical rod of the piston rod 25, and the second spring 30 is pressed between the piston and the end cover 24.

[0038] By setting the second spring 30, the piston rod 25 is elastically installed. The water pressure of the sewage acts on the piston rod 25, driving the piston rod 25 to squeeze the second spring 30 and slide. The return elastic force of the second spring 30 is used to relieve the pressure in the regulating chamber 19 and clean the regulating valve pipeline.

[0039] The outer side of the first output pipe 17 is fixedly connected to the first outer frame 28, one side of the folding tube 29 is fixed to the first outer frame 28, and the other side of the folding tube 29 is provided with a mounting plate facing the port of the first output pipe 17, and the mounting plate is provided with an external thread. The end of the piston rod 25 on the first output pipe 17 is provided with a pressure ball 26, which is pressed onto the mounting plate and fixed to the mounting plate by a connecting cover 27 threadedly connected to the mounting plate.

[0040] By providing the pressure ball 26 , the sliding of the piston rod 25 can squeeze the folding tube 29 , thereby driving the folding tube 29 to fold.

[0041] A second outer frame 33 is fixedly connected to the outer side of the second output pipe 32, and a T-shaped rod 41 facing the end of the second output pipe 32 is slidably inserted into the second outer frame 33. The T-shaped rod 41 is fixedly connected to the end of the tooth plate 31, and the tooth plate 31 is fixedly connected to the end of the piston rod 25 of the second output pipe 32.

[0042] The T-shaped rod 41 is provided to limit and guide the movement of the piston rod 25 , thereby ensuring the meshing connection between the toothed plate 31 and the gear 40 .

[0043] Example 3: On the basis of Example 2, the regulating chamber 19 is connected to the lower end inner cavity of the regulating tube 34 through the second air pipe 18 and the connecting valve 35. The upper end of the regulating tube 34 is provided with a screw hole cover 38 with a screw hole. A piston block 36 is provided in the inner cavity of the regulating tube 34. A screw rod 37 is rotatably mounted on the bearing at the upper end of the piston block 36. The middle section of the screw rod 37 passes through the screw hole cover 38 and is rotatably connected to the screw hole of the screw hole cover 38.

[0044] The height of the piston block 36 is adjusted by setting a screw 37 for rotation of the thread, thereby adjusting the internal volume of the regulating tube 34. When the regulating tube 34 is connected to the regulating chamber 19, the purpose of regulating and controlling the internal pressure is achieved, thereby controlling the height of the valve stem 12 and realizing the control of the drainage flow rate of the pressure reducing valve.

[0045] A marine valve comprises a pressure reducing valve group.

[0046] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A pressure reducing valve assembly, comprising a pressure reducing valve and a regulating assembly for controlling the pressure of the pressure reducing valve, wherein the pressure reducing valve comprises a valve seat (3) and a valve cover (4), a valve stem (12) for controlling opening and closing is mounted on the valve cover (4), an regulating chamber (19) for controlling the height of the valve stem (12) is provided in the valve cover (4), two ends of the pressure reducing valve are respectively connected to a water inlet end (1) and a water discharge end (2), a side of the pressure reducing valve connected to the water inlet end (1) is set as a high-pressure end, and a side of the pressure reducing valve connected to the water discharge end (2) is set as a low-pressure end, and the characteristics are: A first regulating valve (14) is provided on one side of the high-pressure end, one end of the first regulating valve (14) is connected to the water inlet end (1), one end of the first regulating valve (14) controls the internal pressure of the regulating chamber (19) through an external air pressure component, and the regulating chamber (19) is connected to a regulating pipe (34) capable of adjusting the volume of the internal chamber through a connecting valve (35), and a second regulating valve (15) is provided on the low-pressure end, one end of the second regulating valve (15) is connected to the drainage end (2), and one end of the second regulating valve (15) controls the opening and closing of the connecting valve (35) through a driving component.

2. A pressure reducing valve assembly according to claim 1, characterized in that: An inner seat (7) is provided inside the valve seat (3), and the inner seat (7) divides the inner cavity of the valve seat (3) into a high-pressure inner cavity (10) and a low-pressure inner cavity (11). A valve hole (8) is provided on the inner seat (7), and the high-pressure inner cavity (10) is connected to the water inlet end (1), and the low-pressure inner cavity (11) is connected to the drainage end (2). A valve stem (12) is elastically installed on the valve cover (4), and a valve core (9) is provided at the lower end of the valve stem (12) for sealing with the valve hole (8).

3. A pressure reducing valve assembly according to claim 2, characterized in that: A circular tray (5) is provided between the valve cover (4) and the valve seat (3), a rubber diaphragm (6) is fixedly mounted on the tray (5), a gap between the rubber diaphragm (6) and the valve cover (4) is provided as an adjustment chamber (19), a middle section of the valve stem (12) is fixed on the rubber diaphragm (6), a valve core (9) is fixed on one end of the valve stem (12), the other end of the valve stem (12) extends into the adjustment chamber (19), and a first spring (13) is pressed between the upper end of the valve stem (12) and the inner wall of the adjustment chamber (19).

4. A pressure reducing valve assembly according to claim 3, characterized in that: The first regulating valve (14) is provided with three groups of interfaces, namely a first input pipe (17), a first output pipe (22) and a first pressure relief pipe (23). The first regulating valve (14) can control the switching and connection of the three groups of interfaces. The first input pipe (17) is connected to the water inlet end (1), the first pressure relief pipe (23) is connected to the low-pressure inner cavity (11), and an output component is elastically mounted on the first output pipe (22). The air pressure component includes a folding pipe (29), one end of the folding pipe (29) is connected to the inner cavity of the regulating cavity (19) through the first air pipe (16), and the other end of the folding pipe (29) is pressed with the output component.

5. The pressure reducing valve assembly according to claim 4, characterized in that: The second regulating valve (15) is provided with three groups of interfaces, namely a second input pipe (21), a second pressure relief pipe (20) and a second output pipe (32). The second input pipe (21) is connected to the low-pressure inner cavity (11), and the second pressure relief pipe (20) is connected to the drainage end (2). The second regulating valve (15) can control the switching and connection of the three groups of interfaces. An output assembly is installed on the second output pipe (32). The driving assembly includes a rotating rod (39) connected to the regulating member of the connecting valve (35) and a tooth plate (31) connected to the output assembly. The end of the rotating rod (39) is provided with a gear (40) meshing with the tooth plate (31). The rotation of the rotating rod (39) can control the opening and closing of the connecting valve (35).

6. The pressure reducing valve assembly according to claim 5, characterized in that: The output assembly comprises a piston rod (25), a second spring (30) and an end cover (24); the piston at the end of the piston rod (25) is slidably inserted into the inner cavity of the first output tube (22) or the second output tube (32); the vertical rod of the piston rod (25) passes through the end cover (24); the end cover (24) is fixed on the port of the first output tube (22) or the second output tube (32); the second spring (30) is sleeved on the vertical rod of the piston rod (25), and the second spring (30) is pressed between the piston and the end cover (24).

7. The pressure reducing valve assembly according to claim 6, characterized in that: The outer side of the first output tube (17) is fixedly connected to a first outer frame (28), one side of the folding tube (29) is fixed to the first outer frame (28), and the other side of the folding tube (29) is provided with a mounting plate facing the port of the first output tube (17), and the mounting plate is provided with an external thread. A pressure ball (26) is provided at the end of the piston rod (25) on the first output tube (17), and the pressure ball (26) is pressed on the mounting plate, and the pressure ball (26) is fixed to the mounting plate through a connecting cover (27) threadedly connected to the mounting plate.

8. The pressure reducing valve assembly according to claim 6, characterized in that: The outer side of the second output pipe (32) is fixedly connected to a second outer frame (33); a T-shaped rod (41) facing the port of the second output pipe (32) is slidably inserted on the second outer frame (33); the T-shaped rod (41) is fixedly connected to the end of the tooth plate (31); and the tooth plate (31) is fixedly connected to the end of the piston rod (25) of the second output pipe (32).

9. The pressure reducing valve assembly according to claim 6, characterized in that: The regulating chamber (19) is connected to the inner cavity of the lower end of the regulating tube (34) through the second air pipe (18) and the connecting valve (35). The upper end of the regulating tube (34) is provided with a screw hole cover (38) with a screw hole. A piston block (36) is provided in the inner cavity of the regulating tube (34). A screw rod (37) is rotatably mounted on the upper end bearing of the piston block (36). The middle section of the screw rod (37) passes through the screw hole cover (38) and is rotatably connected to the screw hole of the screw hole cover (38).

10. A marine valve, characterized in that: The marine valve comprises the pressure reducing valve assembly according to any one of claims 1 to 9.

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