Throttling cut-off device

Abstract

The utility model relates to the technical field of valves, and discloses a throttling stop device which comprises a throttling stop valve, a driving assembly, a pressure sensor, a flowmeter and a controller, the throttling stop valve comprises a valve body, a valve rod, a valve seat and a valve element, an input port is formed in the bottom of the valve body, and an output port is formed in one side of the valve body. A mounting hole communicated with the output port is formed in the top of the valve seat, the valve rod can be inserted into the mounting hole in an up-down moving mode, the valve seat is mounted at the bottom of the mounting hole and provided with a valve seat hole, the top end of the valve seat hole is communicated with the mounting hole, and the bottom end of the valve seat hole is communicated with the input port. A valve cone which is gradually narrowed from top to bottom is arranged at the bottom of the valve element, the bottom end of the valve cone is embedded into the top end of the valve seat hole and blocks the valve seat hole, the driving assembly is connected with the valve rod and can drive the valve rod to move up and down, and the controller is electrically connected with the driving assembly, the pressure sensor and the flow meter. According to the utility model, the flow and pressure at the output port can be accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a throttling cut-off device. Background Art

[0002] A valve is an important component in a fluid (or liquid) transmission system, which plays a role in closing or conducting the fluid transmission channel and thus controlling the transmission rate and transmission volume of the fluid. A throttling cut-off valve is a type of fluid control valve, mainly used for regulating the flow rate and pressure of the fluid. Throttling cut-off valves are widely used in fields such as petroleum, chemical industry, electric power, metallurgy, and urban water supply, and are one of the common fluid control devices in industrial production. However, the existing throttling cut-off valves are mainly controlled manually, pneumatically, or hydraulically, and cannot accurately control the flow rate and pressure at their outlet. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a throttling cut-off device that can accurately control the flow rate and pressure at the outlet.

[0004] To solve the above technical problem, the utility model provides a throttling cut-off device, which includes a throttling cut-off valve, a driving assembly, a pressure sensor, a flow meter, and a controller. The throttling cut-off valve includes a valve body, a valve stem, a valve seat, and a valve core. The bottom of the valve body is provided with an inlet, and one side of the valve body is provided with an outlet. The top of the valve seat is provided with a mounting hole communicating with the outlet. The valve stem is inserted into the mounting hole in a vertically movable manner. The valve seat is installed at the bottom of the mounting hole. The valve seat is provided with a valve seat hole. The top end of the valve seat hole communicates with the mounting hole, and the bottom end of the valve seat hole communicates with the inlet. The valve core is arranged at the bottom of the valve stem. The bottom of the valve core is provided with a valve cone that gradually narrows from top to bottom. The bottom end of the valve cone is embedded in the top end of the valve seat hole and blocks the valve seat hole. The driving assembly is connected to the valve stem and can drive the valve stem to move up and down. The pressure sensor is used to detect the pressure at the outlet, and the flow meter is used to detect the flow rate at the outlet. The controller is electrically connected to the driving assembly, the pressure sensor, and the flow meter respectively.

[0005] As a preferred embodiment of the present utility model, the throttle stop valve further includes a connection base. A connection hole is provided at the bottom of the valve body and is located below the installation hole. A first communication hole that communicates with both the connection hole and the installation hole is provided at the top of the connection hole. The valve seat is disposed within the connection hole, and the top of the valve seat abuts against the top wall of the connection hole. The valve seat hole communicates with the installation hole through the first communication hole. The connection base is threadedly connected to the connection hole, and the top of the connection base abuts against the bottom of the valve seat. The connection base is provided with a second communication hole, and the input port is disposed at the bottom of the connection base and communicates with the valve seat hole through the second communication hole.

[0006] As a preferred embodiment of the present utility model, a first positioning groove that cooperates with the top of the valve seat is provided at the top of the connection hole, and a second positioning groove that cooperates with the bottom of the valve seat is provided at the top of the connection base.

[0007] As a preferred embodiment of the present utility model, a first tapered surface that gradually expands from top to bottom is provided at the top of the valve seat, and a second tapered surface that gradually narrows from top to bottom is provided at the bottom of the valve seat.

[0008] As a preferred embodiment of the present utility model, a sealing sleeve is hermetically connected within the installation hole, the valve core is slidably inserted within the sealing sleeve, the bottom end of the valve core extends outside the sealing sleeve, and a flow channel that communicates with both the valve seat hole and the input port is provided at the bottom of the sealing sleeve.

[0009] As a preferred embodiment of the present utility model, an installation sleeve is provided at the top of the sealing sleeve, the installation sleeve is threadedly connected to the installation hole, and the valve rod is vertically movably inserted within the installation sleeve.

[0010] As a preferred embodiment of the present utility model, the drive assembly is an electric cylinder. The electric cylinder includes a cylinder body, a piston rod, and a motor. The cylinder body is fixedly connected to the valve body through a connecting rod. The piston rod is vertically disposed and fixedly connected to the valve rod, and the motor is electrically connected to the controller.

[0011] As a preferred embodiment of the present utility model, the device further includes a control display, and the control display is electrically connected to the controller.

[0012] In an embodiment of the utility model, a throttling and cut-off device has the following beneficial effects compared with the prior art: when the device is in the cut-off state, the bottom end of the valve cone is embedded in the top end of the valve seat hole and blocks the valve seat hole, and the input port is not connected to the output port, thus realizing the cut-off function; thereafter, when the device needs to be switched to the throttling state, the driving assembly drives the valve stem to move upward, thereby driving the valve core to move upward, so that the valve cone no longer blocks the top end of the valve seat hole, and the input port is connected to the output port. Since the valve cone gradually narrows from top to bottom, by adjusting the height of the valve cone, the opening degree of the valve seat hole can be adjusted, thereby realizing the throttling function; during use, the controller controls the driving assembly to drive the valve stem to move up and down to adjust the height of the valve cone according to the pressure and flow rate detected by the pressure sensor and the flow meter, so as to adjust the opening degree of the valve seat hole, ensure that the pressure and flow rate at the output port are within the set range, and realize precise control. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the utility model;

[0014] Figure 2 is a schematic connection structure diagram of the driving assembly and the throttling and cut-off valve of the utility model;

[0015] Figure 3 is a schematic structural diagram of the throttling and cut-off valve of the utility model;

[0016] In the figure, 1. Throttling and cut-off valve; 11. Valve body; 111. Input port; 112. Output port; 113. Installation hole; 114. Connection hole; 115. First communication hole; 116. First positioning groove; 12. Valve stem; 13. Valve seat; 131. Valve seat hole; 14. Valve core; 15. Valve cone; 16. Connection base; 161. Second communication hole; 162. Second positioning groove; 17. Sealing sleeve; 171. Flow channel; 18. Installation sleeve; 2. Driving assembly; 21. Cylinder block; 211. Connecting rod; 22. Piston rod; 23. Motor; 3. Pressure sensor; 4. Flow meter; 5. Controller; 6. Control display. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0018] In the description of the present utility model, it should be understood that the azimuth or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. of the present utility model is based on the azimuth or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and therefore cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0019] As Figures 1-3 shown, a throttling cut-off device of a preferred embodiment of the present utility model includes a throttling cut-off valve 1, a driving assembly 2, a pressure sensor 3, a flow meter 4, and a controller 5. The throttling cut-off valve 1 includes a valve body 11, a valve stem 12, a valve seat 13, and a valve core 14. An input port 111 is provided at the bottom of the valve body 11, and an output port 112 is provided on one side of the valve body 11. An installation hole 113 communicating with the output port 112 is provided at the top of the valve seat 13. The valve stem 12 is inserted into the installation hole 113 so as to be able to move up and down. The valve seat 13 is installed at the bottom of the installation hole 113. The valve seat 13 is provided with a valve seat hole 131. The top end of the valve seat hole 131 communicates with the installation hole 113, and the bottom end of the valve seat hole 131 communicates with the input port 111. The valve core 14 is provided at the bottom of the valve stem 12. A valve cone 15 that gradually narrows from top to bottom is provided at the bottom of the valve core 14. The bottom end of the valve cone 15 is embedded in the top end of the valve seat hole 131 and blocks the valve seat hole 131. At this time, the side portion of the valve cone 15 abuts against the top end of the side wall of the valve seat hole 131 to ensure the sealing performance between the valve cone 15 and the valve seat hole 131. The driving assembly 2 is connected to the valve stem 12 and can drive the valve stem 12 to move up and down. The pressure sensor 3 is used to detect the pressure at the output port 112, and the flow meter 4 is used to detect the flow rate at the output port 112. The controller 5 is electrically connected to the driving assembly 2, the pressure sensor 3, and the flow meter 4 respectively.

[0020] The working principle of this embodiment is as follows: When the device is in the cut-off state, the bottom end of the valve cone 15 is embedded in the top end of the valve seat hole 131 and blocks the valve seat hole 131. And under the action of the driving assembly 2 (the driving assembly 2 drives the valve stem 12 to move downward, so that the valve core 14 presses against the valve seat 13), the side of the valve cone 15 remains in contact with the top end of the side wall of the valve seat hole 131. At this time, the top end of the valve seat hole 131 is blocked by the valve cone 15, and the input port 111 is not communicated with the output port 112, thus realizing the cut-off function. After that, when the device needs to be switched to the throttling state, the driving assembly 2 drives the valve stem 12 to move upward, thereby driving the valve core 14 to move upward, so that the side of the valve cone 15 is separated from the top end of the side wall of the valve seat hole 131. At this time, the valve cone 15 no longer blocks the top end of the valve seat hole 131, and the input port 111 is communicated with the output port 112. Since the valve cone 15 gradually narrows from top to bottom, by adjusting the height of the valve cone 15 (before the valve cone 15 disengages from the valve seat hole 131), the opening degree of the valve seat hole 131 can be adjusted, thereby realizing the throttling function. During use, the pressure sensor 3 detects the pressure at the output port 112, the flow meter 4 detects the flow rate at the output port 112, and the controller 5 controls the driving assembly 2 to drive the valve stem 12 to move up and down according to the detected pressure and flow rate to adjust the height of the valve cone 15, thereby adjusting the opening degree of the valve seat hole 131 to ensure that the pressure and flow rate at the output port 112 are within the set range and realizing precise control.

[0021] Exemplarily, the throttle cut-off valve 1 further includes a connection base 16. The bottom of the valve body 11 is provided with a connection hole 114 located below the installation hole 113. The top of the connection hole 114 is provided with a first communication hole 115 that communicates with both the connection hole 114 and the installation hole 113. The valve seat 13 is arranged in the connection hole 114, and the top of the valve seat 13 abuts against the top wall of the connection hole 114. The top end of the valve seat hole 131 communicates with the installation hole 113 through the first communication hole 115. The connection base 16 is threadedly connected to the connection hole 114, and the top of the connection base 16 abuts against the bottom of the valve seat 13. That is, the valve seat 13 is fixed in the connection hole 114 through the connection base 16. After removing the connection base 16, the valve seat 13 can be removed to facilitate replacing valve seats 13 of different specifications (valve seat holes 131 with different apertures) to meet different usage requirements. The connection base 16 is provided with a second communication hole 161. The input port 111 is arranged at the bottom of the connection base 16 and communicates with the bottom end of the valve seat hole 131 through the second communication hole 161. When the device is in the throttling state, the fluid sequentially passes through the input port 111, the second communication hole 161, the valve seat hole 131, the first communication hole 115, the installation hole 113, and the output port 112.

[0022] Exemplarily, the top of the connection hole 114 is provided with a first positioning groove 116 that cooperates with the top of the valve seat 13, and the top of the connection base 16 is provided with a second positioning groove 162 that cooperates with the bottom of the valve seat 13, which is convenient for the positioning and installation of the valve seat 13.

[0023] Exemplarily, the top of the valve seat 13 is provided with a first conical surface that gradually expands from top to bottom to ensure the sealing performance between the top of the valve seat 13 and the first positioning groove 116. The bottom of the valve seat 13 is provided with a second conical surface that gradually narrows from top to bottom to ensure the sealing performance between the bottom of the valve seat 13 and the second positioning groove 162.

[0024] Exemplarily, a sealing sleeve 17 is hermetically connected in the mounting hole 113. The valve core 14 is slidably inserted into the sealing sleeve 17. The bottom end of the valve core 14 extends out of the sealing sleeve 17. The bottom of the sealing sleeve 17 is provided with a flow channel 171 that communicates with the valve seat hole 131 and the input port 111 respectively. When the valve cone 15 no longer blocks the top end of the valve seat hole 131, the valve seat hole 131 communicates with the mounting hole 113 through the flow channel 171, thereby ensuring the communication between the input port 111 and the output port 112.

[0025] Exemplarily, the top of the sealing sleeve 17 is provided with a mounting sleeve 18. The mounting sleeve 18 is threadedly connected to the mounting hole 113. The valve rod 12 is vertically movably inserted into the mounting sleeve 18. During assembly, first install the sealing sleeve 17 in the mounting hole 113, and then threadedly connect the mounting sleeve 18 to the mounting hole 113 to press the sealing sleeve 17 to prevent the sealing sleeve 17 from shifting and ensure the sealing performance between the sealing sleeve 17 and the mounting hole 113 and between the sealing sleeve 17 and the valve core 14.

[0026] Exemplarily, the driving assembly 2 is an electric cylinder. The electric cylinder includes a cylinder block 21, a piston rod 22, and a motor 23. The vertical movement precision of the piston cylinder of the electric cylinder can reach 0.01 mm, and its rated load can reach 10,000 N. The cylinder block 21 is fixedly connected to the valve body 11 through a connecting rod 211. The piston rod 22 is vertically arranged and fixedly connected to the valve rod 12. The motor 23 is electrically connected to the controller 5. The controller 5 can control the movement of the piston rod 22, thereby driving the movement of the valve rod 12.

[0027] Exemplarily, the device further includes a control display 6. The control display 6 is electrically connected to the controller 5, which is convenient for the user to observe and control.

[0028] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and replacements can still be made, and these improvements and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A throttling cut-off device, characterized in that: The utility model comprises a throttling stop valve, a driving component, a pressure sensor, a flow meter and a controller. The throttling stop valve comprises a valve body, a valve stem, a valve seat and a valve core. The bottom of the valve body is provided with an input port, one side of the valve body is provided with an output port, the top of the valve seat is provided with a mounting hole connected with the output port, the valve stem can be inserted into the mounting hole so as to move up and down, the valve seat is installed at the bottom of the mounting hole, the valve seat is provided with a valve seat hole, the top end of the valve seat hole is connected with the mounting hole, the bottom end of the valve seat hole is connected with the input port, the valve core is arranged at the bottom of the valve stem, the bottom of the valve core is provided with a valve cone which gradually narrows from top to bottom, the bottom end of the valve cone is embedded in the top end of the valve seat hole and blocks the valve seat hole, the driving component is connected with the valve stem and can drive the valve stem to move up and down, the pressure sensor is used to detect the pressure at the output port, the flow meter is used to detect the flow at the output port, and the controller is electrically connected with the driving component, the pressure sensor and the flow meter respectively.

2. The throttling cut-off device according to claim 1, characterized in that: The throttling stop valve also includes a connecting base, the bottom of the valve body is provided with a connecting hole located below the mounting hole, the top of the connecting hole is provided with a first connecting hole respectively connected with the connecting hole and the mounting hole, the valve seat is arranged in the connecting hole, the top of the valve seat is abutted against the top wall of the connecting hole, the valve seat hole is connected with the mounting hole through the first connecting hole, the connecting base is threadedly connected with the connecting hole, the top of the connecting base is abutted against the bottom of the valve seat, the connecting base is provided with a second connecting hole, and the input port is arranged at the bottom of the connecting base and is connected with the valve seat hole through the second connecting hole.

3. The throttling cut-off device according to claim 2, characterized in that: A first positioning groove matched with the top of the valve seat is provided at the top of the connecting hole, and a second positioning groove matched with the bottom of the valve seat is provided at the top of the connecting base.

4. The throttling cut-off device according to claim 3, characterized in that: The top of the valve seat is provided with a first conical surface which gradually expands from top to bottom, and the bottom of the valve seat is provided with a second conical surface which gradually narrows from top to bottom.

5. The throttling cut-off device according to claim 1, characterized in that: A sealing sleeve is sealed in the installation hole, the valve core can be slidably inserted in the sealing sleeve, the bottom end of the valve core extends out of the sealing sleeve, and the bottom of the sealing sleeve is provided with flow channels respectively connected to the valve seat hole and the input port.

6. The throttling cut-off device according to claim 5, characterized in that: A mounting sleeve is provided on the top of the sealing sleeve, the mounting sleeve is threadedly connected to the mounting hole, and the valve stem is inserted in the mounting sleeve so as to be movable up and down.

7. The throttling cut-off device according to claim 1, characterized in that: The driving assembly is an electric cylinder, which includes a cylinder body, a piston rod and a motor. The cylinder body is fixedly connected to the valve body through a connecting rod, the piston rod is vertically arranged and fixedly connected to the valve stem, and the motor is electrically connected to the controller.

8. The throttling cut-off device according to claim 1, characterized in that: It also includes a manipulation display, which is electrically connected to the controller.

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