Electric control valve

Abstract

The invention relates to the technical field of adjusting valves, and particularly discloses an electric adjusting valve which comprises a valve body, a lower valve rod and a valve deck, the valve deck is located at the upper end of the valve body, the lower end of the lower valve rod is located in the valve body, a fluid channel is formed in the valve body and is in an S streamline shape, and a fixed inner cylinder is fixedly arranged in the valve body; the fixed inner cylinder is located in the middle of the fluid channel, and the valve plug is slidably connected into the fixed inner cylinder and fixedly connected to the lower end of the lower valve rod through a first nut. A pointing piece is fixedly arranged at the upper end of the lower valve rod, a connecting rod is fixedly arranged at the upper end of the pointing piece, an upper valve rod is fixedly arranged at the upper end of the connecting rod, a filler block is fixedly arranged at the upper end of the valve deck, and the lower valve rod is slidably connected into the valve deck. The valve can be suitable for controlling various fluids with different pressures and temperatures, and the valve body is compact in structure, small in pressure drop loss, large in circulation amount, wide in adjustable range and high in flow characteristic precision.

Description

Technical Field

[0001] The present invention relates to the technical field of regulating valves, and in particular to an electric regulating valve. Background Art

[0002] Regulating valves, also known as control valves, are key components in industrial automation process control. They are used to change parameters such as flow, pressure, temperature, and liquid level within a pipeline through power operation. Regulating valves typically consist of a valve body and an actuator. The actuator pushes the valve body, which regulates flow.

[0003] Control valves are mainly divided into pneumatic control valves, electric control valves, and hydraulic control valves according to the driving method. Pneumatic control valves use compressed air as the power source and drive the valve through a pneumatic actuator; electric control valves use a motor as the power source and drive the valve through an electric actuator; hydraulic control valves use liquid pressure as the power source.

[0004] The existing technology still has the following areas for improvement: the existing regulating valve cannot accurately control the flow rate in the valve body according to the differences in fluid pressure and temperature, and the structure inside the valve body is bulky, resulting in a decrease in the accuracy of internal adjustment of the valve body, which leads to fluid leakage or performance degradation, easily causing energy waste and reduced system efficiency. The adjustable range is limited and cannot meet the precise adjustment requirements of certain complex fluid control systems, resulting in the inability to fully exert its due control function, limiting its application potential in a wider range of fields. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an electric regulating valve that can be used to control fluids of various pressures and temperatures. The valve body has a compact structure, small pressure drop loss, large flow rate, wide adjustable range, and high flow characteristic accuracy.

[0006] The purpose of the present invention can be achieved through the following technical solutions: An electric regulating valve comprises a valve body, a lower valve stem and a valve cover, wherein the valve cover is located at the upper end of the valve body, the lower end of the lower valve stem is located inside the valve body, a fluid passage is defined inside the valve body, and the fluid passage is S-streamlined, a fixed inner cylinder is fixedly provided inside the valve body, the fixed inner cylinder is located in the middle of the fluid passage, the valve plug is slidably connected to the interior of the fixed inner cylinder, and the valve plug is fixedly connected to the lower end of the lower valve stem via a first nut; The upper end of the lower valve stem is fixedly provided with a pointing piece, the upper end of the pointing piece is fixedly provided with a connecting rod, the upper end of the connecting rod is fixedly provided with an upper valve stem, the upper end of the valve cover is fixedly provided with a stuffing block, and the lower valve stem is slidably connected to the inside of the valve cover.

[0007] Furthermore, the valve cover and the valve body are fixedly connected by a plurality of second stud bolts, and each of the second stud bolts is threadedly provided with a third nut.

[0008] Furthermore, a support frame is fixedly provided on both sides of the filling block, and a scale and a controller are fixedly provided on one of the support frames. The scale is located on the inner side of the support frame, and the controller is located on the outer side of the support frame. The pointing member corresponds to the scale.

[0009] Furthermore, a packing sleeve is fixedly provided on the upper end of the packing block, a packing pressure plate is fixedly provided on the upper end of the packing pressure sleeve, a plurality of first stud bolts are fixedly provided between the packing pressure plate and the packing block, and a second nut is threadedly provided on the upper end of each first stud bolt.

[0010] Furthermore, upper connecting blocks are fixedly provided on the upper ends of the two support frames, and a pneumatic actuator is fixedly provided on the upper ends of the upper connecting blocks.

[0011] Furthermore, the controller is electrically connected to the pneumatic actuator, and a display screen is provided on the controller. The filler pressure plate is provided with a distance sensor for detecting the displacement distance of the pointing member, and the distance sensor is electrically connected to the controller.

[0012] Furthermore, the upper valve stem is slidably connected to the inside of the pneumatic actuator.

[0013] Furthermore, a rotating handle is fixedly provided on the upper end of the upper valve stem.

[0014] Furthermore, a flow opening is provided below the fixed inner cylinder, and the height of the valve plug is greater than the height of the flow opening.

[0015] Furthermore, a sleeve is fixedly provided inside the valve body, the sleeve is located below the flow port, and a first gasket is provided between the sleeve and the valve body.

[0016] Furthermore, a second gasket is provided between the fixed inner cylinder and the valve body, and a third gasket is provided between the fixed inner cylinder and the valve cover.

[0017] The beneficial effects of the present invention are: (1) By arranging the valve body, the lower valve stem and the valve cover, the technical effect that can be achieved is that the valve cover is located at the upper end of the valve body, the lower end of the lower valve stem is located inside the valve body, and a fluid channel is opened inside the valve body, and the fluid channel is S-shaped; The controller controls the pneumatic actuator to drive the upper valve stem downward, the upper valve stem drives the connecting rod downward, the connecting rod drives the pointing piece downward, the pointing piece drives the lower valve stem downward, and the lower valve stem drives the valve plug downward. The S-shaped streamlined fluid channel can effectively slow down the flow rate of the fluid, allowing the fluid to flow more smoothly in the pipeline, thereby reducing flow resistance, smaller pressure drop loss, larger flow volume, wider adjustable range, and higher flow characteristic accuracy.

[0018] (2) By setting the pointing member and the scale, the technical effect that can be achieved is that the upper end of the lower valve stem is fixedly provided with the pointing member, the upper end of the pointing member is fixedly provided with a connecting rod, the upper end of the connecting rod is fixedly provided with the upper valve stem, a supporting frame is fixedly provided with a scale and a controller, the scale is located on the inner side of the supporting frame, the controller is located on the outer side of the supporting frame, and the pointing member corresponds to the scale; The rotating handle drives the upper valve stem to move up and down, the upper valve stem drives the connecting rod to move up and down, the connecting rod drives the pointing piece to move up and down until it reaches the specified scale position, and the pointing piece drives the lower valve stem to move up and down. This design allows the operator to not only directly operate the regulating valve with the help of the rotating handle when the gas or power is cut off, but also make fine adjustments with the help of the rotating handle when the controller controls the pneumatic actuator to drive the upper valve stem to move downward. That is, the pointing piece and the scale can further accurately control the flow rate in the valve body according to the different fluid pressures and temperatures, thereby improving the accuracy of the internal adjustment of the valve body.

[0019] (3) By providing the valve plug and the fixed inner cylinder, the technical effect that can be achieved is that the fixed inner cylinder is fixedly provided inside the valve body, the fixed inner cylinder is located in the middle position of the fluid channel, the valve plug is slidably connected to the inside of the fixed inner cylinder, the valve plug is fixedly connected to the lower end of the lower valve stem through a first nut, a flow port is opened below the fixed inner cylinder, and the height of the valve plug is greater than the height of the flow port; The valve plug slides in the fixed inner cylinder to adjust the flow size of the flow port. The valve plug and the fixed inner cylinder make the structure inside the valve body more compact. It is suitable for small flow control in occasions requiring high reliability and closing performance. It can be widely used to control fluids of various pressures and temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 A partial enlarged view of middle A; Figure 3 for Figure 1 A partial enlarged view of B in the middle; Figure 4 for Figure 1 Close-up view of C; Figure 5 For Figure 1 Close-up view of D; BRIEF DESCRIPTION OF DRAWINGS In the drawings: 1, valve body; 2, first gasket; 3, sleeve; 4, valve plug; 5, first nut; 6, second gasket; 7, third gasket; 8, lower valve stem; 9, valve cover; 10, packing block; 11, packing sleeve; 12, packing plate; 13, pneumatic actuator; 14, first stud bolt; 15, second nut; 16, second stud bolt; 17, third nut; 18, rotating handle; 19, fixed inner cylinder; 20, upper connecting block; 21, upper valve stem; 22, controller; 23, scale; 24, connecting rod; 25, pointing piece; 26, support frame. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0025] Referring to Figures 1 to 5The utility model discloses an electric governing valve, including valve body 1, lower valve stem 8 and valve cover 9, valve cover 9 is located at the upper end of valve body 1, and the lower end of lower valve stem 8 is located inside valve body 1, and the inside of valve body 1 is seted with fluid passage, and the fluid passage is S streamline, and the inside of valve body 1 is fixedly provided with fixed inner tube 19, and fixed inner tube 19 is located at the intermediate position of fluid passage, and valve plug 4 is slidably connected in the inside of fixed inner tube 19, and valve plug 4 is fixedly connected in the lower end of lower valve stem 8 through first nut 5.

[0026] The S streamline fluid passage can effectively slow down the flow rate of the fluid, make the fluid flow more smoothly in the pipeline, thereby reduce the flow resistance, make the pressure drop loss smaller, the flow capacity larger, the adjustable range wider and the flow characteristic precision higher.

[0027] The upper end of lower valve stem 8 is fixedly provided with a pointing piece 25, the upper end of the pointing piece 25 is fixedly provided with a connecting rod 24, the upper end of the connecting rod 24 is fixedly provided with an upper valve stem 21, the upper end of the valve cover 9 is fixedly provided with a packing block 10, and the lower valve stem 8 is slidably connected in the inside of the valve cover 9.

[0028] The valve cover 9 and the valve body 1 are fixedly connected through a plurality of second double-headed bolts 16, and each second double-headed bolt 16 is threadedly provided with a third nut 17.

[0029] The two sides of the packing block 10 are fixedly provided with a support frame 26, the support frame 26 is fixedly provided with a scale 23 and a controller 22, the scale 23 is located on the inner side of the support frame 26, the controller 22 is located on the outer side of the support frame 26, and the pointing piece 25 corresponds to the scale 23.

[0030] The pointing piece 25 and the scale 23 can more accurately control the flow in the valve body 1 according to the different fluid pressure and temperature, and improve the accuracy of the internal adjustment of the valve body 1.

[0031] The upper end of the packing block 10 is fixedly provided with a packing pressing sleeve 11, the upper end of the packing pressing sleeve 11 is fixedly provided with a packing pressing plate 12, a plurality of first double-headed bolts 14 are fixedly arranged between the packing pressing plate 12 and the packing block 10, and each first double-headed bolt 14 is threadedly provided with a second nut 15.

[0032] The upper ends of the two support frames 26 are fixedly provided with an upper connecting block 20, the upper end of the upper connecting block 20 is fixedly provided with a pneumatic execution device 13, and the pneumatic execution device 13 is used for controlling the upper valve stem 21 to move up and down.

[0033] The controller 22 is electrically connected with the pneumatic execution device 13, the packing pressing plate 12 is provided with a distance measuring sensor for detecting the displacement distance of the pointing piece, the distance measuring sensor is electrically connected with the controller 22, the controller 22 is provided with a display screen, and the flow value of the adjustment can also be displayed through the display screen.

[0034] The upper valve stem 21 is slidably connected to the inside of the pneumatic actuator 13. A rotary handle 18 is fixedly provided on the upper end of the upper valve stem 21, and the rotary handle 18 is used to adjust the size of the flow rate.

[0035] A flow port is defined below the fixed inner cylinder 19, and the valve plug 4 is taller than the port. The valve plug 4 and the fixed inner cylinder 19 create a more compact structure within the valve body 1, making it suitable for low-flow control in applications requiring high reliability and shutoff performance. It can be widely used to control fluids of various pressures and temperatures.

[0036] A sleeve 3 is fixedly provided inside the valve body 1 . The sleeve 3 is located below the flow port. A first gasket 2 is provided between the sleeve 3 and the valve body 1 .

[0037] A second gasket 6 is provided between the fixed inner cylinder 19 and the valve body 1 , and a third gasket 7 is provided between the fixed inner cylinder 19 and the valve cover 9 .

[0038] The working principle and use process of the present invention are as follows: the controller 22 is started, and the controller 22 transmits a signal to the pneumatic actuator 13, and the pneumatic actuator 13 drives the upper valve stem 21 to move downward, the upper valve stem 21 drives the connecting rod 24 to move downward, the connecting rod 24 drives the pointing member 25 to move downward, the pointing member 25 drives the lower valve stem 8 to move downward, and the lower valve stem 8 drives the valve plug 4 to move downward until the valve plug 4 stops moving when it contacts the sleeve 3, so that the flow port is closed, and the closing of the control valve is controlled; Pipes are connected on both sides of the fluid channel of the valve body 1 respectively. The rotating handle 18 is turned, and the rotating handle 18 drives the upper valve stem 21 to move up and down. The upper valve stem 21 drives the connecting rod 24 to move up and down. The connecting rod 24 drives the pointing member 25 to move up and down. The up and down position of the pointing member 25 is adjusted by the scale 23 until it reaches the specified scale position. The pointing member 25 drives the lower valve stem 8 to move up and down. The lower valve stem 8 drives the valve plug 4 to move up and down. The valve plug 4 slides in the fixed inner tube 19 to adjust the flow size of the flow port, thereby accurately adjusting the flow value of the regulating valve.

[0039] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An electric regulating valve, characterized in that: The valve body (1) comprises a valve body (1), a lower valve stem (8) and a valve cover (9), wherein the valve cover (9) is located at the upper end of the valve body (1), the lower end of the lower valve stem (8) is located inside the valve body (1), a fluid channel is provided inside the valve body (1), and the fluid channel is S-streamlined, a fixed inner cylinder (19) is fixedly provided inside the valve body (1), and the fixed inner cylinder (19) is located at the middle position of the fluid channel, the valve plug (4) is slidably connected to the inside of the fixed inner cylinder (19), and the valve plug (4) is fixedly connected to the lower end of the lower valve stem (8) through a first nut (5); The upper end of the lower valve stem (8) is fixedly provided with a pointing member (25), the upper end of the pointing member (25) is fixedly provided with a connecting rod (24), the upper end of the connecting rod (24) is fixedly provided with an upper valve stem (21), the upper end of the valve cover (9) is fixedly provided with a stuffing block (10), and the lower valve stem (8) is slidably connected to the interior of the valve cover (9); A support frame (26) is fixedly provided on both sides of the filler block (10), and a scale (23) and a controller (22) are fixedly provided on one of the support frames (26). The scale (23) is located on the inner side of the support frame (26), and the controller (22) is located on the outer side of the support frame (26). The pointing member (25) corresponds to the scale (23).

2. The electric regulating valve according to claim 1, characterized in that: The valve cover (9) and the valve body (1) are fixedly connected via a plurality of second stud bolts (16), and each of the second stud bolts (16) is threadedly provided with a third nut (17).

3. The electric regulating valve according to claim 1, characterized in that: A packing sleeve (11) is fixedly provided at the upper end of the packing block (10), a packing pressure plate (12) is fixedly provided at the upper end of the packing pressure sleeve (11), a plurality of first stud bolts (14) are fixedly provided between the packing pressure plate (12) and the packing block (10), and a second nut (15) is threadedly provided at the upper end of each first stud bolt (14).

4. The electric regulating valve according to claim 1, characterized in that: An upper connecting block (20) is fixedly provided at the upper ends of the two support frames (26), and a pneumatic actuator (13) is fixedly provided at the upper ends of the upper connecting blocks (20).

5. The electric regulating valve according to claim 4, characterized in that: The controller is electrically connected to the pneumatic actuator, and a display screen is provided on the controller. A distance sensor for detecting the displacement distance of the pointing member is provided on the filler pressure plate, and the distance sensor is electrically connected to the controller.

6. The electric regulating valve according to claim 4, characterized in that: The upper valve stem (21) is slidably connected to the interior of the pneumatic actuator (13).

7. The electric regulating valve according to claim 1, characterized in that: A rotating handle (18) is fixedly provided on the upper end of the upper valve stem (21).

8. The electric regulating valve according to claim 1, characterized in that: A flow opening is provided below the fixed inner cylinder (19), and the height of the valve plug (4) is greater than the height of the flow opening.

9. The electric regulating valve according to claim 8, characterized in that: A sleeve (3) is fixedly arranged inside the valve body (1), and the sleeve (3) is located below the flow port. A first gasket (2) is arranged between the sleeve (3) and the valve body (1).

10. The electric regulating valve according to claim 1, characterized in that: A second gasket (6) is provided between the fixed inner cylinder (19) and the valve body (1), and a third gasket (7) is provided between the fixed inner cylinder (19) and the valve cover (9).

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