Pressure reducing valve and depth self-adaptive water inlet device

Abstract

The pressure reducing valve comprises a shell and a control body, and a first cavity, a second cavity and a third cavity are formed in the shell; the control body comprises a piston, a connecting rod and a valve element, the piston is arranged in the third cavity and is in sealed sliding connection with the inner wall of the third cavity, one end of the connecting rod is connected with the piston, and the other end of the connecting rod is connected with the valve element which is arranged at the throttling opening; sliding of the piston can drive the valve element to move so as to change the distance between the valve element and the throttling opening, and therefore the opening degree of the throttling opening is adjusted. The invention further provides a depth self-adaptive water inlet device which comprises a pressure reducing valve and a water inlet valve, and the water inlet valve is connected with the outlet. Compared with the prior art, the piston of the pressure reducing valve can move along with the change of the water pressure, so that the valve element is driven to move, the opening degree of the throttling opening is adjusted, and the change of the water pressure and the change of the opening degree of the throttling opening are mutually counteracted; according to the depth self-adaptive water inlet device, stability of water inlet flow can be achieved through self-adaptive adjustment of the pressure reducing valve.

Description

Technical Field

[0001] The present invention relates to the technical field of deep sea equipment, and in particular to a pressure reducing valve and a depth-adaptive water inlet device. Background Art

[0002] With the development of the times, the breadth and depth of ocean exploration are constantly expanding. Many deep-sea equipment need to draw water from seawater. At this time, they have to face the high pressure of the deep sea, and the flow pipeline will face the impact of seawater caused by the huge pressure difference. Usually, it is necessary to design according to the maximum seawater depth, and adopt methods such as strengthening the structure and increasing the flow resistance to resist the deep-sea pressure.

[0003] In recent years, a deep-sea water inlet valve (CN113775773A) has been proposed, which converts the back pressure of seawater into the shear force of the steel ball and transmits the force to the control mechanism through the pin shaft. The control mechanism only needs a small force to open the water inlet valve.

[0004] However, the above-mentioned water inlet valve can only complete the water inlet action of deep-sea equipment, and cannot adapt to the requirements of certain equipment for a constant water inlet rate under different seawater depth conditions. It may face the situation of faster water inlet rate in deep sea areas or slower water inlet rate in shallow sea areas. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, and to propose a pressure reducing valve and a depth adaptive water inlet device to solve the technical problem in the prior art that the water inlet rate of the water inlet valve is not constant under different seawater depth conditions.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a pressure reducing valve, comprising: a housing, a first cavity, a second cavity and a third cavity are formed in the housing, an inlet connected to the first cavity and an outlet connected to the second cavity are formed on the surface of the housing, a throttle port connected to the first cavity and the second cavity is formed inside the housing, and the second cavity is connected to the third cavity; The control body includes a piston, a connecting rod and a valve core. The piston is arranged in the third cavity and is sealed and slidably connected to the inner wall of the third cavity. One end of the connecting rod is connected to the piston, and the other end is connected to the valve core. The valve core is arranged at the throttle port. The sliding of the piston can drive the valve core to move to change the distance between the valve core and the throttle port, thereby adjusting the opening of the throttle port.

[0007] In some embodiments, the shell includes a partition, which forms a first cavity, a second cavity, and a third cavity in the shell. The partition also forms a throttling port and a through hole connecting the second cavity and the third cavity.

[0008] In some embodiments, the connecting rod passes through the partition and the throttle port and is connected to the valve core, and the connecting rod is sealingly and slidably connected to the partition.

[0009] In some embodiments, the piston divides the third chamber into a first sub-chamber and a second sub-chamber, the second chamber is connected to the first sub-chamber, and the pressure reducing valve also includes an elastic member, which is arranged in the second sub-chamber and connects the piston and the inner wall of the second sub-chamber, and the elastic member is in a compressed state to apply an elastic force to the piston toward the valve core.

[0010] In some embodiments, the housing further comprises an upper cover and an upper valve body, the upper cover and the upper valve body are detachably and hermetically connected to form a third cavity, and the upper cover is formed with a cylindrical cavity for accommodating the elastic member.

[0011] In some embodiments, one end of the cylindrical cavity is open, and the shell further includes a blocking piece, which is movably connected to the opening in a sealing manner, and the elastic piece is in abutment with the blocking piece, and the blocking piece can adjust the compression amount of the elastic piece.

[0012] In some embodiments, the shell also includes a lower valve body, the upper valve body and the lower valve body are detachably sealed and connected, the partition and the upper valve body together form a first cavity, and the partition, the upper valve body and the lower valve body together form a second cavity; the inlet and the outlet are located in the upper valve body.

[0013] In a second aspect, the present invention further provides a depth-adaptive water inlet device, comprising a pressure reducing valve and a water inlet valve, wherein the water inlet valve is connected to the outlet.

[0014] In some embodiments, the water inlet valve includes a water inlet valve body, a water inlet valve core and an actuator. The water inlet valve body has a valve water inlet and a valve water outlet. The valve water inlet is connected to the outlet. The water inlet valve core is built into the water inlet valve body. The actuator is transmission-connected to the water inlet valve core to drive the water inlet valve core to close or open the valve outlet.

[0015] In some embodiments, the actuating member includes a push rod, one end of which is fixedly connected to the water inlet valve core, and the other end of the push rod passes through the water inlet valve body and is sealingly and slidably connected to the water inlet valve body.

[0016] Compared with the prior art, the piston of the pressure reducing valve provided by the present invention can move with the change of water pressure, thereby driving the valve core to move and adjusting the opening of the throttle port, so that the change of water pressure and the change of throttle port opening offset each other, so that the water inlet flow rate remains stable; the depth adaptive water inlet device provided by the present invention can achieve the stability of the water inlet flow rate through the adaptive adjustment of the pressure reducing valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a cross-sectional view of a pressure reducing valve provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of a depth adaptive water inlet device provided by an embodiment of the present invention; Figure 3 yes Figure 2 Cross-sectional view of the water inlet valve. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem in the prior art that the water inlet rate of the water inlet valve is not constant under different seawater depth conditions, the present invention provides a pressure reducing valve and a depth adaptive water inlet device, which can achieve adaptive adjustment under different water pressures to stabilize the water inlet flow.

[0020] It should be noted that the pressure reducing valve and the depth adaptive water inlet device described in the present invention are used for but not limited to sea conditions at different depths. For the convenience of explanation, in the present invention, only the application of the pressure reducing valve and the depth adaptive water inlet device to sea conditions at different depths is used as an example for explanation. The principles of the application of the pressure reducing valve and the depth adaptive water inlet device in other scenarios are essentially the same as those applied to sea conditions at different depths, and will not be elaborated here.

[0021] See also Figure 1 , Figure 1 Schematic diagram of the structure of a pressure reducing valve in one embodiment of the present invention. The pressure reducing valve includes a housing 1 and a control body 2.

[0022] The shell 1 is formed with a first cavity 11, a second cavity 12 and a third cavity 13. The surface of the shell 1 is also formed with an inlet connected to the first cavity 11 and an outlet connected to the second cavity 12. As shown by the arrows in the figure, seawater flows in from the inlet and flows out from the outlet. A throttle port 14 connecting the first cavity 11 and the second cavity 12 is also formed inside the shell 1, and the second cavity 12 is connected to the third cavity 13.

[0023] The control body 2 includes a piston 21, a connecting rod 22 and a valve core 23. The piston 21 is disposed in the third cavity 13 and is sealed and slidably connected to the inner wall of the third cavity 13. One end of the connecting rod 22 is connected to the piston 21, and the other end is connected to the valve core 23. The valve core 23 is disposed at the throttle port 14. The sliding of the piston 21 can drive the valve core 23 to move to change the distance between the valve core 23 and the throttle port 14, thereby adjusting the opening of the throttle port 14.

[0024] That is, when the water pressure at the inlet increases, since the first cavity 11, the second cavity 12 and the third cavity 13 are interconnected, the water pressure in the third cavity 13 also increases, pushing the piston 21 upward. At the same time, the valve core 23 is also driven to move upward, reducing the opening of the throttle port 14. The increase in water pressure and the decrease in throttle port 14 offset each other, so that the water flow through the pressure reducing valve remains stable.

[0025] In some embodiments, the housing 1 includes a partition 15 , which forms a first cavity 11 , a second cavity 12 , and a third cavity 13 in the housing 1 . The partition 15 also forms a throttle port 14 and a through hole connecting the second cavity 12 and the third cavity 13 .

[0026] The housing 1 further comprises an upper cover 16 and an upper valve body 17, and the upper cover 16 and the upper valve body 17 are detachably and hermetically connected to form a third cavity 13. The housing 1 further includes a lower valve body 18, and the upper valve body 17 and the lower valve body 18 are detachably sealed. The partition 15 and the upper valve body 17 together form a first cavity 11, and the partition 15, the upper valve body 17 and the lower valve body 18 together form a second cavity 12. The inlet and the outlet are located at the upper valve body 17. The above-mentioned sealing can be achieved by setting a sealing ring.

[0027] In some embodiments, the piston 21 divides the third cavity 13 into a first sub-cavity 131 and a second sub-cavity 132. The second cavity 12 is connected to the first sub-cavity 131, that is, the first sub-cavity 131 is located below the piston 21 in the figure, and the second sub-cavity 132 is located above the piston 21 in the figure.

[0028] The connecting rod 22 extends downward, passes through the partition 15 and the throttle port 14, and is connected to the valve core 23. The connecting rod 22 is sealed and slidably connected to the partition 15. The valve core 23 is specifically located in the second cavity 12, below the throttle port 14. The distance between the valve core 23 and the throttle port 14 controls the opening size of the throttle port 14.

[0029] In some embodiments, the pressure reducing valve further includes an elastic member 3, which is disposed in the second sub-chamber 132 and connected to the piston 21 and the inner wall of the second sub-chamber 132. The elastic member 3 is in a compressed state to apply an elastic force toward the valve core 23 to the piston 21. When the seawater pressure decreases, the elastic force of the elastic member 3 can push the piston 21 downward, so that the valve core 23 is away from the throttle 14, and the opening of the throttle 14 is increased. The increase in the throttle 14 is used to supplement the decrease in the seawater pressure, so that the water flow through the pressure reducing valve remains stable.

[0030] In a preferred embodiment, the upper cover 16 is formed with a cylindrical cavity for accommodating the elastic member 3. The elastic member 3 can be a spring of a suitable type.

[0031] In some embodiments, one end of the cylindrical cavity is open, and the housing 1 further includes a plugging member 19, which is movably connected to the opening in a sealed manner. The elastic member 3 abuts against the plugging member 19, and the plugging member 19 can adjust the compression amount of the elastic member 3. For example, the plugging member 19 can be threadedly connected to the upper cover 16, and the depth of the plugging member 19 extending into the cylindrical cavity can be changed by screwing the plugging member 19, thereby changing the compression amount of the elastic member 3, and then adjusting the elastic force of the elastic member 3.

[0032] See also Figure 2, Figure 2 4 is a schematic diagram of the structure of the depth adaptive water inlet device provided by an embodiment of the present invention. The depth adaptive water inlet device includes a pressure reducing valve 400 and a water inlet valve 500, and the water inlet valve 500 is connected to the outlet. The water inlet valve 500 is used to control the opening and closing of the water inlet.

[0033] See also Figure 3 In some embodiments, the water inlet valve 500 includes a water inlet valve body 510, a water inlet valve core 520, and an actuator 530. The water inlet valve body 510 has a valve water inlet 511 and a valve water outlet 512. The valve water inlet 511 is connected to the outlet, and the valve water outlet 512 is connected to an external water receiving device. The water inlet valve core 520 is built into the water inlet valve body 510. The actuator 530 is connected to the water inlet valve core 520 to drive the water inlet valve core 520 to move, so that the water inlet valve core 520 closes or opens the valve water outlet 512.

[0034] In some embodiments, the actuator 530 includes a push rod, one end of which is fixedly connected to the water inlet valve core 520, and the other end of which passes through the water inlet valve body 510 and is sealed and slidably connected to the water inlet valve body 510. The push rod can be connected to a driving structure such as a hydraulic cylinder, an air cylinder, or a motor connecting rod mechanism to drive the push rod to move to open and close the water inlet valve 500.

[0035] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A pressure reducing valve, characterized in that: include: A shell, wherein a first cavity, a second cavity and a third cavity are formed in the shell, an inlet communicating with the first cavity and an outlet communicating with the second cavity are also formed on the surface of the shell, a throttle port communicating with the first cavity and the second cavity is also formed inside the shell, and the second cavity is communicated with the third cavity; A control body, the control body includes a piston, a connecting rod and a valve core, the piston is arranged in the third cavity and is sealingly and slidingly connected to the inner wall of the third cavity, one end of the connecting rod is connected to the piston, and the other end thereof is connected to the valve core, and the valve core is arranged at the throttle port; the sliding of the piston can drive the valve core to move to change the distance between the valve core and the throttle port, thereby adjusting the opening of the throttle port.

2. The pressure reducing valve according to claim 1, characterized in that: The shell includes a partition, which forms the first cavity, the second cavity and the third cavity in the shell. The partition also forms the throttling port and a through hole connecting the second cavity and the third cavity.

3. The pressure reducing valve according to claim 2, characterized in that: The connecting rod passes through the partition and the throttle port and is connected to the valve core, and the connecting rod is sealingly and slidably connected to the partition.

4. The pressure reducing valve according to claim 2, characterized in that: The piston divides the third cavity into a first sub-cavity and a second sub-cavity, the second cavity is connected to the first sub-cavity, and the pressure reducing valve also includes an elastic member, which is arranged in the second sub-cavity and connects the piston and the inner wall of the second sub-cavity, and the elastic member is in a compressed state to apply an elastic force to the piston toward the valve core.

5. The pressure reducing valve according to claim 4, characterized in that: The housing further comprises an upper cover and an upper valve body, wherein the upper cover and the upper valve body are detachably and hermetically connected to form the third cavity, and the upper cover is formed with a cylindrical cavity for accommodating the elastic member.

6. The pressure reducing valve according to claim 5, characterized in that: One end of the cylindrical cavity is open, and the shell further comprises a blocking piece, which is movably connected to the opening in a sealing manner, and the elastic piece is in abutment with the blocking piece, and the blocking piece can adjust the compression amount of the elastic piece.

7. The pressure reducing valve according to claim 5, characterized in that: The shell also includes a lower valve body, the upper valve body and the lower valve body are detachably sealed and connected, the partition and the upper valve body together form the first cavity, and the partition, the upper valve body and the lower valve body together form the second cavity; the inlet and the outlet are located on the upper valve body.

8. A depth-adaptive water inlet device, characterized in that: It comprises the pressure reducing valve as described in any one of claims 1 to 7 and a water inlet valve, wherein the water inlet valve is connected to the outlet.

9. The depth-adaptive water inlet device according to claim 8, characterized in that: The water inlet valve comprises a water inlet valve body, a water inlet valve core and an actuator, the water inlet valve body has a valve water inlet and a valve water outlet, the valve water inlet is connected to the outlet, the water inlet valve core is built into the water inlet valve body, and the actuator is transmission-connected to the water inlet valve core to drive the water inlet valve core to close or open the valve water outlet.

10. The depth-adaptive water inlet device according to claim 9, characterized in that: The actuating member comprises a push rod, one end of which is fixedly connected to the water inlet valve core, and the other end of which passes through the water inlet valve body and is sealed and slidably connected to the water inlet valve body.

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