Cage type single-seat regulating valve

Abstract

The utility model relates to the technical field of regulating valves, in particular to a cage type single-seat regulating valve, which comprises a valve body, a water inlet and a water outlet are respectively arranged at two ends of the valve body, the water inlet is connected with the water outlet through a fluid channel, a regulating hole is arranged at the top of the valve body, a valve seat is arranged in the valve body below the regulating hole, and a valve rod is arranged on the valve seat. The top of the valve seat is connected with a valve cage, a valve clack is arranged on the inner side of the valve cage, the top of the valve clack is connected with a valve rod, the top of the valve rod penetrates through a filler barrel with filler inside to be connected with a connecting block, the top of the connecting block is connected with the driving end of an actuator, and the connecting block can be driven through driving of the actuator. The valve rod and the valve clack are further driven to move, opening and closing of the adjusting valve are achieved, the whole adjusting valve is simple in structure, few parts are used in the sealing structure, the sealing effect is good, the fault rate of the adjusting valve is reduced, and the service life of the adjusting valve is effectively prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of governing valve, especially a cage type single seat governing valve. BACKGROUND

[0002] In the gas, liquid (fluid) delivery pipeline, all want to set up multiple valves to control, control pipeline's opening, closing or the size of opening degree etc.

[0003] In other pipeline uses low pressure governing valve, its valve body both ends pressure difference is smaller, just reduced the valve body's cooperation, sealing, action stability requirement, can adopt single seat governing valve to realize control function, but the single seat governing valve of prior art, mostly complex structure, the sealing structure parts more, sealing effect is not ideal, valve rod moves inflexibly, can not adapt to the need of pipeline flexible control.

[0004] Therefore, it is necessary to provide a cage type single seat governing valve to solve the above technical problems. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides a cage type single seat governing valve.

[0006] The cage type single seat governing valve provided by the utility model, including: valve body, the both ends of valve body are equipped with water inlet and water outlet respectively, water inlet and water outlet are connected through fluid passage, the top of valve body is equipped with adjusting hole, the inside of valve body below adjusting hole is installed with valve seat, the top of valve seat is connected with valve cage, the inside of valve cage is equipped with valve clack, the top of valve clack is connected with valve rod, the top of valve rod is connected with connecting block through filler tube with built-in filler, the top of connecting block is connected with the drive end of actuator, the top of valve body is connected with protection plate through lower nut.

[0007] Preferably, the connecting block and the filler tube are located inside the protective frame, the bottom of the filler tube penetrates the top of the protective frame and is connected with the valve cover, the valve cover is in the shape of a cylinder, and part of the valve rod is located inside the valve cover.

[0008] Preferably, the filler is selected from V-shaped polytetrafluoroethylene, impregnated polytetrafluoroethylene asbestos, or graphite.

[0009] Preferably, the valve cage includes a cylinder body, and a plurality of through holes are arranged on the side surface of the cylinder body.

[0010] Preferably, the fluid channel is S-shaped, and the water inlet and the water outlet are located at the same height.

[0011] Preferably, the actuator used by the actuator is one of a spring diaphragm type, a piston type, an electric actuator, a hydraulic actuator, and an electro-hydraulic linkage actuator.

[0012] Preferably, a first metal gasket is provided between the bottom of the valve disc and the bottom end of the valve seat, and a second metal gasket is provided between the top of the valve cage and the bottom of the protective plate.

[0013] Compared with the related art, the cage-type single-seat regulating valve provided by the present invention has the following beneficial effects:

[0014] 1. The utility model provides an actuator, which can drive the connecting block through the actuator, thereby driving the valve stem and the valve disc to move, thereby realizing the opening and closing of the regulating valve. The actuator drives the valve stem to move flexibly, the regulating valve has high sensitivity and high control accuracy, and the valve cage and valve seat are provided to cooperate with the valve stem and the valve disc, so that the valve stem and the valve disc move smoothly and the sealing effect is enhanced. In addition, the entire regulating valve has a simple structure, the sealing structure uses fewer parts, the sealing effect is better, the failure rate of the regulating valve is reduced, and the service life of the regulating valve is effectively increased.

[0015] 2. The utility model sets the fluid channel as S-shaped, which can reduce the pressure drop loss during adjustment, increase the flow rate of the regulating valve, and increase the adjustment range of the regulating valve;

[0016] 3. The utility model can improve the selectivity of the overall regulating valve device by selecting one of multiple structures for the actuator used by the actuator, and then select different actuators according to different needs to improve the adaptability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A structural schematic diagram of a preferred embodiment of a cage-type single-seat regulating valve provided by the utility model;

[0018] Figure 2 for Figure 1 The schematic diagram of the structure inside the valve body is shown;

[0019] Numbers in the figure: 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Valve stem; 5. Stuffing cylinder; 6. Connecting block; 7. Actuator; 8. Protective frame; 9. Valve cover; 10. Protective plate; 11. Valve cage; 12. Cylinder; 13. Through hole; 14. Valve disc; 15. Fluid channel; 16. Stuffing. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely 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 can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0022] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, if the terms "first", "second", "third" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the embodiments of the present application, it should also be noted that unless otherwise explicitly specified and limited, if the terms "set", "mount", "connected", "connected" appear, they should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, or can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The new type of cage single-seat regulating valve is described in detail below in combination with specific embodiments.

[0027] Reference Figures 1 to 2 The cage single-seat regulating valve comprises a valve body 1, water inlets 2 and water outlets 3 arranged at two ends of the valve body 1, fluid passages 15 connecting the water inlets 2 and the water outlets 3, an adjusting hole arranged at the top of the valve body 1, a valve seat arranged inside the valve body 1 below the adjusting hole, a valve cage 11 connected to the top of the valve seat, a valve flap 14 arranged inside the valve cage 11, a valve rod 4 connected to the top of the valve flap 14, a packing gland 5 with packing 16 arranged inside the valve rod 4, a connecting block 6 connected to the valve rod 4, a drive end of an actuator 7 connected to the top of the connecting block 6, and a lower nut and a protective plate 10 connected to the top of the valve body 1.

[0028] In the embodiment of the utility model, as shown in the figure, the connecting block 6 and the packing gland 5 are located inside the protective frame 8, the bottom of the packing gland 5 penetrates through the top of the protective frame 8 and is connected to the valve cover 9, the valve cover 9 is in the shape of a cylinder, and part of the valve rod 4 is located inside the valve cover 9. Figure 1 It should be noted that: by arranging the actuator 7, the actuator 7 can be driven to drive the connecting block 6, thereby driving the valve rod 4 and the valve flap 14 to move, so as to open and close the regulating valve. The valve rod 4 moves flexibly under the drive of the actuator 7, the regulating valve has high sensitivity and high control precision, the valve cage 11 and the valve seat are arranged to cooperate with the valve rod 4 and the valve flap 14, so as to make the valve rod 4 and the valve flap 14 move stably, enhance the sealing effect, and the whole regulating valve has simple structure, fewer parts for the sealing structure, better sealing effect, reduced failure rate of the regulating valve, and effectively prolonged service life of the regulating valve.

[0029] In the embodiment of the utility model, as shown in the figure, the packing 16 is made of V-shaped polytetrafluoroethylene, polytetrafluoroethylene asbestos or graphite.

[0030] Figure 1 It should be noted that: by selecting the packing 16 from V-shaped polytetrafluoroethylene, polytetrafluoroethylene asbestos or graphite, the selectability of the material of the regulating valve can be improved, the sealing performance of the connection between the valve rod 4 and the valve body 1 can be effectively improved, and the friction can be reduced, so as to facilitate the up-and-down movement of the valve rod 4.

[0031] In the embodiment of the utility model, as shown in the figure, the valve cage 11 comprises a cylinder body 12, and a plurality of through holes 13 are arranged on the side surface of the cylinder body 12.

[0032] It should be noted that: by selecting the packing 16 from V-shaped polytetrafluoroethylene, polytetrafluoroethylene asbestos or graphite, the selectability of the material of the regulating valve can be improved, the sealing performance of the connection between the valve rod 4 and the valve body 1 can be effectively improved, and the friction can be reduced, so as to facilitate the up-and-down movement of the valve rod 4. Figure 2 In the embodiment of the utility model, as shown in the figure, the valve cage 11 comprises a cylinder body 12, and a plurality of through holes 13 are arranged on the side surface of the cylinder body 12.​

[0033] Need to explain: by setting the valve cage 11 structure with through hole 13, can effectively prevent the liquid flash and cavitation.

[0034] In the embodiment of the utility model, reference Figure 2 As shown in the figure, the shape of the fluid passage 15 is S-shaped, and the water inlet 2 and the water outlet 3 are at the same height.

[0035] Need to explain: by setting the fluid passage 15 as S-shaped, the pressure drop loss is small during adjustment, the flow of the regulating valve is increased, and the adjustment range of the regulating valve is increased.

[0036] In the embodiment of the utility model, reference Figure 1 As shown in the figure, the actuator 7 adopts one of spring diaphragm type, piston type, electric actuator, hydraulic, electro-hydraulic linkage.

[0037] Need to explain: by selecting one of multiple structures for the actuator 7, the selectability of the overall regulating valve device can be improved, and different actuators can be selected according to different needs to improve the adaptability of the device.

[0038] In the embodiment of the utility model, reference Figure 1 As shown in the figure, the bottom of the valve disc 14 and the bottom end of the valve seat are provided with a first metal gasket, and the top of the valve cage 11 and the bottom of the protection plate 10 are provided with a second metal gasket.

[0039] Need to explain: by setting the first metal gasket and the second metal gasket, the sealing between the valve disc 14 and the valve seat, and the protection plate 10 and the valve cage 11 is effectively improved.

[0040] The working principle of the cage type single seat regulating valve provided by the utility model is as follows:

[0041] By setting the actuator 7, the actuator 7 can be driven to drive the connecting block 6, and then drive the valve stem 4 and the valve disc 14 to move, realize the opening and closing of the regulating valve, and the valve stem 4 moves flexibly through the driving of the actuator 7, the regulating valve has high sensitivity and high control precision, and through the setting of the valve cage 11 and the valve seat, the valve stem 4 and the valve disc 14 can be matched with the valve stem 4 and the valve disc 14, so that the valve stem 4 and the valve disc 14 move stably, the sealing effect is enhanced, the whole regulating valve structure is simple, the sealing structure uses fewer parts, the sealing effect is better, the failure rate of the regulating valve is reduced, and the service life of the regulating valve is effectively improved.

[0042] The circuit and control involved in the utility model are prior art, and will not be described in detail here.

[0043] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which are made by using the content of the present application specification and drawings, are also included in the patent protection scope of the present application.

Claims

1. A cage-type single-seat regulating valve, characterized in that: include: A valve body (1), wherein both ends of the valve body (1) are provided with a water inlet (2) and a water outlet (3), the water inlet (2) and the water outlet (3) are connected via a fluid channel (15), an adjustment hole is provided at the top of the valve body (1), a valve seat is installed inside the valve body (1) below the adjustment hole, the top of the valve seat is connected to a valve cage (11), a valve disc (14) is provided on the inner side of the valve cage (11), the top of the valve disc (14) is connected to a valve stem (4), the top of the valve stem (4) passes through a stuffing cylinder (5) with built-in stuffing (16) and is connected to a connecting block (6), the top of the connecting block (6) is connected to a driving end of an actuator (7), and the top of the valve body (1) is connected to a protective plate (10) via a lower nut.

2. A cage-type single-seat regulating valve according to claim 1, characterized in that: The connecting block (6) and the stuffing tube (5) are located on the inner side of the protective frame (8); the bottom of the stuffing tube (5) passes through the top of the protective frame (8) and is connected to the valve cover (9); the valve cover (9) is cylindrical in shape; part of the valve stem (4) is located on the inner side of the valve cover (9).

3. The cage-type single-seat regulating valve according to claim 2, characterized in that: The filler (16) is selected from V-type polytetrafluoroethylene, polytetrafluoroethylene-impregnated asbestos or graphite.

4. The cage-type single-seat regulating valve according to claim 1, characterized in that: The valve cage (11) comprises a cylinder (12), and a plurality of through holes (13) are provided on a side surface of the cylinder (12).

5. The cage-type single-seat regulating valve according to claim 1, characterized in that: The fluid channel (15) is in an S-shaped shape, and the water inlet (2) and the water outlet (3) are located at the same height.

6. The cage-type single-seat regulating valve according to claim 1, characterized in that: The actuator (7) adopts an actuator selected from the group consisting of a spring film type, a piston type, an electric actuator, a hydraulic actuator, and an electro-hydraulic linkage actuator.

7. The cage-type single-seat regulating valve according to claim 1, characterized in that: A first metal gasket is provided between the bottom of the valve disc (14) and the bottom end of the valve seat, and a second metal gasket is provided between the top of the valve cage (11) and the bottom of the protective plate (10).

Images