Flow regulating valve of marine cooling water system and using method

Abstract

The flow regulating valve comprises a valve body, a valve rod, a valve element and a valve element movement regulating mechanism, a valve seat is arranged on the inlet side of the valve body, a valve cover matched with the valve body in a sealed mode is arranged at the top of the valve body, and the valve rod perpendicularly penetrates through a center hole in the valve cover and extends into an inner cavity of the valve body; the valve element movement adjusting mechanism comprises a rotation driving assembly and a translation transmission assembly, the top end of the valve rod is located outside the valve body and connected with the rotation driving assembly, the bottom end of the valve rod is located inside the valve body and connected with the translation transmission assembly, and the translation transmission assembly is connected with the valve element and drives the valve element to move horizontally. The low-resistance and low-noise design of the flow regulating valve is achieved, and the flow regulating performance of the flow regulating valve is improved.

Description

Technical Field

[0001] The present application relates to the technical field of design of ship cooling source guarantee system, specifically to the flow control related technology of electromechanical equipment cooling water system, and relates to a flow regulating valve of ship cooling water system and a use method thereof. Background Art

[0002] Flow control valves are common pipeline valves in the cooling water system of ship electromechanical equipment. They are usually used to adjust the cooling water flow, improve the pipeline flow distribution characteristics and user cooling effect. At present, the flow control valves used in the ship field lack appropriate design standards and specifications. They are usually designed with reference to CB / T 314-94 "Flanged Bronze Throttle Valve", or directly use stop valves for flow regulation. The flow regulation effect obtained by these means is usually not ideal. The flow rate and the valve disc stroke show a nonlinear relationship, and the curvature of the flow change curve is high. At the same time, due to the zigzag flow channel structure, the valve flow resistance is large and the turbulence is high, which causes large pipeline fluid noise, which is an important noise source for the internal environment of the ship cabin. Based on the above background, it is necessary to design a low-resistance, low-noise flow control valve. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a flow regulating valve and a method of use for a marine cooling water system in response to the above-mentioned problems, which has excellent flow regulating ability, adapts to various cooling conditions, and meets the flow characteristics of low resistance and low noise.

[0004] The embodiment of the present application is implemented as follows:

[0005] The embodiment of the present application provides a flow regulating valve for a marine cooling water system, characterized in that it comprises a valve body, a valve stem, a valve core and a valve core movement regulating mechanism, wherein a valve seat is provided on the inlet side of the valve body, a valve cover is provided on the top of the valve body to be sealed therewith, the valve stem vertically passes through the center hole on the valve cover and extends into the inner cavity of the valve body, and the valve core is configured with the valve seat;

[0006] The valve core movement adjustment mechanism includes a rotation drive assembly and a translation transmission assembly. The top end of the valve stem is located outside the valve body and is connected to the rotation drive assembly. The bottom end of the valve stem is located inside the valve body and is connected to the translation transmission assembly. The translation transmission assembly is connected to the valve core to drive the valve core to move horizontally.

[0007] In some optional embodiments, the rotary drive assembly is a rotary handwheel, and the translation transmission assembly includes a bevel gear transmission group, a transmission screw and a gear seal support frame, the bevel gear transmission group includes an active bevel gear connected to the valve stem, and a driven bevel gear meshing with the active bevel gear, the transmission screw is horizontally penetrated through the gear seal support frame and is threadedly connected to the driven bevel gear, and the inner end of the transmission screw is connected to the valve core.

[0008] In some optional implementation schemes, the valve core is a conical structure with a spherical top, a conical slot is provided at the center of the valve seat, and the sealing working surface where the conical slot contacts the valve core is a conical surface.

[0009] In some optional implementation schemes, the middle portion of the transmission screw is provided with an external thread, which is threadedly connected to the driven bevel gear, and both ends of the transmission screw are smooth rods, which are gap-matched with the gear sealing support frame.

[0010] In some optional embodiments, the gear sealing support frame includes a gear sealing frame and a fixed rod, the gear sealing frame is a cylindrical structure, which is externally mounted on the bevel gear transmission group, the valve stem passes through the top center of the gear sealing frame, the top end of the fixed rod is fixedly connected to the bottom center of the gear sealing frame, and the bottom end is fixedly connected to the bottom surface of the valve body.

[0011] In some optional embodiments, a sealing packing is provided in the center hole of the valve cover and is sealingly fitted with the valve stem, and a packing gland is connected to the top of the valve cover.

[0012] In some optional embodiments, a limiting ring is provided at the outer end of the transmission screw, and the distance between the limiting ring and the gear seal support frame is the same as the thickness of the valve seat.

[0013] In some optional embodiments, the maximum diameter of the conical surface of the valve core is the same as the outer diameter of the gear sealing frame.

[0014] In some optional embodiments, the valve cover is a cylindrical structure with an outer edge on the top, the valve body is provided with a valve stem fixing seat on the top, the valve stem fixing seat is a cylindrical structure configured and fitted with the valve cover, the top surface of the valve stem fixing seat is fitted with the outer edge of the valve cover, and a sealing gasket is provided between the fitting surfaces.

[0015] A method for a flow regulating valve of a marine cooling water system, characterized in that it comprises the following steps:

[0016] Step a: The inlet and outlet of the flow control valve are provided with connecting flanges, which are fixed in the pipeline system by bolt connection. The valve installation direction is consistent with the flow direction of the pipeline medium, and a horizontal installation method is adopted;

[0017] Step b, rotate the handwheel to drive the valve stem and the active bevel gear to rotate, and then drive the driven bevel gear to rotate; the rotation of the driven bevel gear drives the transmission screw to move horizontally, and the valve core moves with the transmission screw. The annular gap between the valve seat and the valve core constitutes the internal flow channel of the valve, and the valve core performs linear reciprocating motion to change the flow area of ​​the valve.

[0018] The beneficial effects of the present application are as follows: the present application provides a flow regulating valve for a marine cooling water system and a method of use, which is designed to meet the flow regulation needs of a cooling water system for ship electromechanical equipment, has excellent flow regulation performance, a simple structure, high feasibility, and low resistance and low noise flow characteristics, can improve the resistance characteristics and noise level of the cooling water pipe network system, effectively adapt to various cooling conditions, and can also be expanded to flow regulation scenarios in the fields of construction, petrochemicals, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A cross-sectional view of a flow regulating valve according to an embodiment of the present application;

[0021] Figure 2 for Figure 1 AA view;

[0022] Figure 3 This is a curve diagram of the flow area of ​​the flow control valve according to the embodiment of the present application as a function of the displacement distance of the valve core. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0028] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0031] like Figure 1As shown, the present invention proposes a flow regulating valve for a marine cooling water system, comprising a valve body 1, a valve stem 2, a valve core 3 and a valve core movement regulating mechanism, a valve seat 4 is arranged on the inlet side of the valve body, a valve cover 5 is arranged on the top of the valve body and is sealed therewith, the valve stem vertically passes through the center hole on the valve cover and extends into the inner cavity of the valve body, and the valve core is arranged with the valve seat.

[0032] The valve core movement adjustment mechanism includes a rotation drive assembly and a translation transmission assembly. The top end of the valve stem is located outside the valve body and connected to the rotation drive assembly. The bottom end of the valve stem is located inside the valve body and connected to the translation transmission assembly. The translation transmission assembly is connected to the valve core to drive the valve core to move horizontally.

[0033] The rotary drive component is a rotary handwheel 6, and turning the rotary handwheel drives the valve stem to rotate; the translation transmission component includes a bevel gear transmission group, a transmission screw 7 and a gear seal support frame, the bevel gear transmission group includes an active bevel gear 8 connected to the valve stem, and a driven bevel gear 9 meshing with the active bevel gear, the transmission screw is horizontally penetrated on the gear seal support frame, and is threadedly connected to the driven bevel gear, and the inner end of the transmission screw is connected to the valve core.

[0034] The flow control valve adopts a flow channel structure parallel to the pipeline axis, and the valve seat, valve core, transmission screw, valve body and the inlet and outlet flanges of the valve body are all coaxial.

[0035] The valve core is a conical structure with a spherical top. The center of the valve seat is provided with a conical slot, and the sealing working surface where the conical slot contacts the valve core is a conical surface. The valve seat is fixed on the inlet side of the valve. The annular gap between the valve seat and the valve core constitutes the flow area of ​​the flow channel inside the valve. The valve core is fixed on the front end of the transmission screw and moves linearly with the transmission screw, thereby changing the flow area of ​​the valve. The flow area A is approximately linearly related to the moving distance X of the bullet-shaped valve core.

[0036] The middle part of the transmission screw is provided with an external thread, which is threadedly connected with the driven bevel gear. The two ends of the transmission screw are smooth rods, which are gap-matched with the gear seal support frame. The transmission screw has threads only in the middle section. The thread lead angle of the transmission screw is adjusted to achieve thread self-locking. The transmission screw can only be driven to move by rotating the driven bevel gear to fix the flow area of ​​the valve.

[0037] A limit ring 10 is provided at the outer end of the transmission screw. The distance between the limit ring and the gear seal support frame is the same as the thickness of the valve seat, that is, the maximum stroke of the valve core. The limit ring limits the displacement distance of the transmission screw.

[0038] The gear seal support frame includes a gear seal frame 11 and a fixed rod 12. The gear seal frame is a cylindrical structure and is sleeved on the bevel gear transmission group. The valve stem passes through the top center of the gear seal frame. The top end of the fixed rod is fixedly connected to the bottom center of the gear seal frame, and the bottom end is fixedly connected to the bottom surface of the valve body.

[0039] In order to avoid corrosion and flow impact of fluid medium on gears, improve the smoothness of the flow channel structure inside the valve and reduce flow resistance, the bevel gear transmission group is set in the gear sealing frame. At the same time, the gear sealing frame plays a role in fixing and supporting the transmission screw.

[0040] A sealing packing 13 is arranged in the center hole of the valve cover, which is sealed with the valve stem and used for valve sealing. A packing gland 14 is connected to the top of the valve cover to fix the packing and the valve stem. The valve cover is a cylindrical structure with an outer edge on the top. A valve stem fixing seat 15 is arranged on the top of the valve body. The valve stem fixing seat is a cylindrical structure configured and fitted with the valve cover. The top surface of the valve stem fixing seat fits with the outer edge of the valve cover, and a sealing gasket 16 is arranged between the fitting surfaces.

[0041] The maximum diameter of the conical surface of the valve core is the same as the outer diameter of the gear sealing frame, which improves the regularity of the valve flow channel structure; the smooth conical profile surface of the valve core can play a guiding role, and the regular flow channel structure can reduce flow resistance and turbulence, thereby reducing valve fluid noise.

[0042] When the above-mentioned flow control valve is in use, firstly, connecting flanges are set at the inlet and outlet of the flow control valve, and fixed in the pipeline system by bolt connection. The valve installation direction is consistent with the flow direction of the pipeline medium, and a horizontal installation method is adopted; when adjusting the flow, the hand wheel is rotated to drive the valve stem and the active bevel gear to rotate, and then the driven bevel gear is driven to rotate; the rotation of the driven bevel gear drives the transmission screw to move horizontally, and the valve core moves with the transmission screw. The annular gap between the valve seat and the valve core constitutes the internal flow channel of the valve, and the valve core makes a linear reciprocating motion to change the flow area of ​​the valve.

[0043] The installation direction of the flow control valve should be consistent with the flow direction of the medium. The medium flows through the inlet flange, valve seat, valve core in sequence into the valve body, bypasses the outer surface of the gear sealing frame, and flows out of the valve body from the outlet flange; the regular flow channel structure can reduce flow resistance and turbulence, thereby reducing valve fluid noise and improving the resistance characteristics and noise level of the pipeline system.

[0044] The flow area A of a typical valve is calculated as the valve core moves a certain distance X, and the resulting curve is (see Figure 3 ), it can be seen that the flow control valve has a smoother, nearly linear flow control characteristic, and will not have a situation where the flow area changes sharply with the valve core displacement like the traditional throttle valve or stop valve, and the flow control performance is better.

[0045] The above is only a preferred embodiment of the present intellectual achievement, but the present intellectual achievement should not be limited to the contents disclosed in the embodiment and the accompanying drawings. All equivalents or modifications completed without departing from the spirit disclosed in the present invention fall within the scope of protection of the present invention.

Claims

1. A flow control valve for a marine cooling water system, characterized in that: It includes a valve body, a valve stem, a valve core and a valve core movement adjustment mechanism, wherein the inlet side of the valve body is provided with a valve seat, the top of the valve body is provided with a valve cover configured to seal with it, the valve stem vertically passes through the center hole on the valve cover and extends into the inner cavity of the valve body, and the valve core is configured with the valve seat; The valve core movement adjustment mechanism includes a rotation drive assembly and a translation transmission assembly. The top end of the valve stem is located outside the valve body and is connected to the rotation drive assembly. The bottom end of the valve stem is located inside the valve body and is connected to the translation transmission assembly. The translation transmission assembly is connected to the valve core to drive the valve core to move horizontally.

2. A flow control valve for a marine cooling water system according to claim 1, characterized in that: The rotary drive assembly is a rotary hand wheel, and the translation transmission assembly includes a bevel gear transmission group, a transmission screw and a gear seal support frame. The bevel gear transmission group includes an active bevel gear connected to the valve stem, and a driven bevel gear meshing with the active bevel gear. The transmission screw is horizontally penetrated through the gear seal support frame and is threadedly connected to the driven bevel gear. The inner end of the transmission screw is connected to the valve core.

3. A flow control valve for a marine cooling water system according to claim 2, characterized in that: The valve core is a conical structure with a spherical top, a conical slot hole is arranged at the center of the valve seat, and the sealing working surface where the conical slot hole contacts the valve core is a conical surface.

4. A flow control valve for a marine cooling water system according to claim 3, characterized in that: The middle part of the transmission screw is provided with an external thread, which is threadedly connected with the driven bevel gear. The two ends of the transmission screw are smooth rods, which are gap-matched with the gear sealing support frame.

5. A flow control valve for a marine cooling water system according to claim 4, characterized in that: The gear seal support frame includes a gear seal frame and a fixed rod. The gear seal frame is a cylindrical structure and is sleeved on the bevel gear transmission group. The valve stem passes through the top center of the gear seal frame. The top end of the fixed rod is fixedly connected to the bottom center of the gear seal frame, and the bottom end is fixedly connected to the bottom surface of the valve body.

6. A flow control valve for a marine cooling water system according to claim 1 or 5, characterized in that: A sealing packing is arranged in the central hole of the valve cover and is sealed and fitted with the valve stem, and a packing gland is connected to the top of the valve cover.

7. A flow control valve for a marine cooling water system according to claim 4 or 5, characterized in that: A limiting ring is provided at the outer end of the transmission screw, and the distance between the limiting ring and the gear seal support frame is the same as the thickness of the valve seat.

8. The flow control valve for a marine cooling water system according to claim 5, characterized in that: The maximum diameter of the conical surface of the valve core is the same as the outer diameter of the gear sealing frame.

9. A flow control valve for a marine cooling water system according to claim 6, characterized in that: The valve cover is a cylindrical structure with an outer edge on the top, and a valve stem fixing seat is provided on the top of the valve body. The valve stem fixing seat is a cylindrical structure configured and fitted with the valve cover, and the top surface of the valve stem fixing seat fits with the outer edge of the valve cover, and a sealing gasket is provided between the fitting surfaces.

10. A method for using a flow control valve for a marine cooling water system as claimed in claim 5, characterized in that: The steps include: Step a: The inlet and outlet of the flow control valve are provided with connecting flanges, which are fixed in the pipeline system by bolt connection. The valve installation direction is consistent with the flow direction of the pipeline medium, and a horizontal installation method is adopted; Step b, rotate the handwheel to drive the valve stem and the active bevel gear to rotate, and then drive the driven bevel gear to rotate; the rotation of the driven bevel gear drives the transmission screw to move horizontally, and the valve core moves with the transmission screw. The annular gap between the valve seat and the valve core constitutes the internal flow channel of the valve, and the valve core performs linear reciprocating motion to change the flow area of ​​the valve.

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