An integrated electric throttle globe valve without a valve stem packing

Abstract

The present invention discloses an integrated electric throttle globe valve without a valve stem packing, which includes a throttle globe valve body. The throttle globe valve comprises a valve body, the valve body is provided with a valve cavity, an air inlet and an air outlet. A valve sleeve is installed in the valve cavity, and a valve cover for fixing the valve sleeve is installed on the valve body. A valve core is installed in the valve sleeve, a sealing gasket is installed at the front end of the valve core, a driving concave cavity is arranged at the rear end of the valve core, a valve core driving lead screw is threadedly connected in the driving concave cavity, and the rear end of the valve core driving lead screw is fixedly connected with a driving motor. By rotating the valve core driving lead screw by the driving motor, the movement of the valve core is realized, so as to control the opening and closing of the valve. An integrated valve stemless motion mechanism of the valve core and the transmission mechanism is adopted, and the valve stem and the sealing packing mechanism of the traditional valve are cancelled, so that the actuator of the valve and the valve can be integrated into one body, and the overall volume of the electric valve can be further reduced.

Description

Technical Field

[0001] The present invention relates to a globe valve, in particular to an electric throttle globe valve with an integrated valve stem packingless structure. Background Art

[0002] The valve stem is an important component for transmission on a valve. One end of the valve stem is connected to an actuator, and the other end is directly connected to the valve core to rotate or move, so as to realize the opening and closing function of the valve. The actuator connected to the valve stem is usually some relatively large driving motors, which causes the overall volume of the valve to increase and occupy more space. At the same time, the valve stem also needs to maintain good sealing performance. However, during the long-term use of the valve, the frequent rotation or linear movement of the valve stem easily leads to wear of the packing, resulting in a decline in the sealing performance of the valve stem packing or even the failure of the packing system sealing. Especially for media such as toxic, flammable, and explosive substances, if the packing system leaks or fails, major accidents will occur. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides an electric throttle globe valve with an integrated valve stem packingless structure.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0005] An electric throttle globe valve with an integrated valve stem packingless structure includes a throttle globe valve body. The throttle globe valve includes a valve body, which is provided with a valve cavity, an air inlet and an air outlet. The side wall of the valve cavity is provided with an air inlet passage communicating with the air inlet, and the front end of the valve cavity is provided with an air outlet passage communicating with the air outlet. A valve sleeve is installed in the valve cavity, and a valve cover for fixing the valve sleeve is installed on the valve body. The valve sleeve is provided with a plurality of first through holes corresponding to the position of the air inlet passage, and the valve sleeve is provided with second through holes corresponding to the position of the air outlet passage. A valve core is installed in the valve sleeve. A sealing gasket is installed at the front end of the valve core, and a driving concave cavity is provided at the rear end of the valve core. Threads are provided on the inner wall of the driving concave cavity, and a valve core driving screw rod is threadedly connected in the driving concave cavity. The rear end of the valve core driving screw rod is fixedly connected to a driving motor, and the driving motor is fixedly installed on the valve cover.

[0006] A rotation prevention groove is provided on the side wall of the valve core, and a valve core rotation prevention pin is installed on the side wall of the valve sleeve. After assembly, the end of the valve core rotation prevention pin is inserted into the rotation prevention groove.

[0007] The length of the rotation prevention groove is greater than the diameter of the first through hole.

[0008] A fixing cover for fixing the sealing gasket is installed at the front end of the valve core.

[0009] The diameter of the fixed cover is smaller than that of the second flow-through hole, and the diameter of the sealing gasket is larger than that of the second flow-through hole.

[0010] A motor shaft cavity is arranged at the rear end of the valve core driving lead screw, and a key connection is adopted between the motor shaft cavity and the driving motor.

[0011] An angular contact ball bearing is installed between the valve core driving lead screw and the valve cover.

[0012] A sealing ring is installed between the valve cover and the valve body.

[0013] The intake passage and the exhaust passage are respectively communicated with a pressure sensor, and the pressure sensor is installed on the valve body.

[0014] The beneficial effects of the present invention are as follows: A valve core driving lead screw is threadedly connected to the rear end of the valve core of the present invention. By rotating the valve core driving lead screw with a driving motor, the movement of the valve core is realized, thereby controlling the opening and closing of the valve. A valve rodless motion mechanism integrating the valve core and the transmission mechanism is adopted, canceling the valve rod and the packing seal mechanism of the traditional valve. The actuator of the valve and the valve can be integrated, further reducing the overall volume of the electric valve. In addition, seals are installed between the front end of the valve core, the valve cover and the valve body, and the seals are not easily worn during the movement of the valve core, ensuring the sealing performance of the valve and preventing leakage, and increasing the service life of the valve. Brief Description of the Drawings

[0015] The present invention will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a schematic cross-sectional view of the present invention;

[0017] Figure 2 is a schematic cross-sectional view of the valve body;

[0018] Figure 3 is a schematic cross-sectional view of the valve sleeve;

[0019] Figure 4 is a schematic cross-sectional view of the valve core;

[0020] Figure 5 is a schematic cross-sectional view of the valve core driving lead screw. Detailed Description of the Invention

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] Referring to Figures 1 to 5 , an integrated electric throttle globe valve without a valve stem packing, comprising a throttle globe valve body. The throttle globe valve includes a valve body 1, the valve body 1 is provided with a valve cavity 2, an air inlet 3 and an air outlet 4. An air inlet passage 5 communicating with the air inlet 3 is provided on the side wall of the valve cavity 2, and an air outlet passage 6 communicating with the air outlet 4 is provided at the front end of the valve cavity 2. A valve sleeve 7 is installed in the valve cavity 2, and a valve cover 12 for fixing the valve sleeve 7 is installed on the valve body 1. A plurality of first flow holes 8 are provided at the position of the valve sleeve 7 corresponding to the air inlet passage 5, and a second flow hole 15 is provided at the position of the valve sleeve 7 corresponding to the air outlet passage 6. This kind of throttle globe valve is designed with flow holes with a throttling function on the valve sleeve 7. When the valve core 9 moves, a part of the area of the flow hole is covered, and the size of the area is determined by the position of the valve core 9. The flow rate can be adjusted from the maximum to nearly zero. A valve core 9 is installed in the valve sleeve 7, a sealing gasket 14 is installed at the front end of the valve core 9, a driving concave cavity 10 is provided at the rear end of the valve core 9, threads are provided on the inner wall of the driving concave cavity 10, and a valve core driving screw rod 11 is threadedly connected in the driving concave cavity 10. The rear end of the valve core driving screw rod 11 is fixedly connected with a driving motor 13, and the driving motor 13 is fixedly installed on the valve cover 12. An integrated valve stemless motion mechanism of the valve core 9 and the transmission mechanism is adopted, canceling the valve stem and the sealing packing mechanism of the traditional valve, and the actuator of the valve and the valve can be integrated, further reducing the overall volume of the electric valve.

[0024] A rotation prevention groove 17 is provided on the side wall of the valve core 9, and a valve core rotation prevention pin 18 is installed on the side wall of the valve sleeve 7. After assembly, the end of the valve core rotation prevention pin 18 is inserted into the rotation prevention groove 17, and the length of the rotation prevention groove 17 is greater than the diameter of the first flow hole 8 to ensure that the valve core 9 does not rotate during movement.

[0025] A fixing cover 21 for fixing the sealing gasket 14 is installed at the front end of the valve core 9. The diameter of the fixing cover 21 is smaller than that of the second flow-through hole 15, and the diameter of the sealing gasket 14 is larger than that of the second flow-through hole 15. A sealing seat is arranged on the end face of the second flow-through hole 15 facing the sealing gasket 14. When the sealing gasket 14 contacts the sealing seat, the cut-off function when the valve is closed is realized. A sealing ring 22 is installed between the valve cover 12 and the valve body 1. Sealing elements are installed between the front end of the valve core 9, the valve cover 12 and the valve body 1, and the sealing elements are not easily worn during the movement of the valve core 9, ensuring the sealing performance of the valve and preventing leakage, and increasing the service life of the valve.

[0026] A motor shaft cavity 19 is arranged at the rear end of the valve core driving lead screw 11. The motor shaft cavity 19 and the driving motor 13 are connected by a key, so that the driving motor 13 does not bear axial force.

[0027] An angular contact ball bearing 20 is installed between the valve core driving lead screw 11 and the valve cover 12. The valve core driving lead screw 11 bears axial force by the angular contact bearing, including the large axial force generated when closing the valve. Therefore, the driving motor 13 does not bear axial force, and a motor without a thrust structure can be used.

[0028] The intake passage 5 and the outlet passage 6 are respectively connected to a pressure sensor 16. The pressure sensor 16 is installed on the valve body 1. Pressure sensors 16 are installed at both the inlet and outlet of the fluid on the valve body 1 to send out the differential pressure signal of the inlet / outlet. The control system feeds back the pressure signals at the inlet and outlet of the valve to the driving motor 13, and drives the valve core 9 by controlling the rotation of the motor to realize the throttling, pressure regulating and cut-off functions of the valve.

[0029] The above embodiments cannot limit the protection scope of the present invention. Those skilled in the professional technical field, without departing from the overall concept of the present invention, make equal modifications and changes, which still fall within the scope covered by the present invention.

Claims

1. An electric throttle globe valve with an integrated valve stem packing, comprising a throttle globe valve body, characterized in that The throttle stop valve includes a valve body (1), the valve body (1) is provided with a valve cavity (2), an air inlet (3) and an air outlet (4), the side wall of the valve cavity (2) is provided with an air inlet passage (5) communicating with the air inlet (3), the front end of the valve cavity (2) is provided with an air outlet passage (6) communicating with the air outlet (4), a valve sleeve (7) is installed in the valve cavity (2), a valve cover (12) for fixing the valve sleeve (7) is installed on the valve body (1), a plurality of first through holes (8) are arranged at the position of the valve sleeve (7) corresponding to the air inlet passage (5), a second through hole (15) is arranged at the position of the valve sleeve (7) corresponding to the air outlet passage (6), a valve core (9) is installed in the valve sleeve (7), a sealing gasket (14) is installed at the front end of the valve core (9), a driving concave cavity (10) is arranged at the rear end of the valve core (9), the inner wall of the driving concave cavity (10) is provided with threads, a valve core driving screw rod (11) is threadedly connected in the driving concave cavity (10), the rear end of the valve core driving screw rod (11) is fixedly connected with a driving motor (13), and the driving motor (13) is fixedly installed on the valve cover (12); A fixing cover (21) for fixing the sealing gasket (14) is installed at the front end of the valve core (9); The diameter of the fixing cover (21) is smaller than the diameter of the second through hole (15), and the diameter of the sealing gasket (14) is larger than the diameter of the second through hole (15); A sealing seat is arranged on the end face of the second through hole (15) facing the sealing gasket (14). When the sealing gasket (14) contacts the sealing seat, the cut-off function during valve shut-off is realized; A sealing ring (22) is installed between the valve cover (12) and the valve body (1).

2. The electric throttle stop valve with an integrated valve stemless packing according to claim 1, characterized in that A rotation stop groove (17) is arranged on the side wall of the valve core (9), and a valve core rotation stop pin (18) is installed on the side wall of the valve sleeve (7). After assembly, the end of the valve core rotation stop pin (18) is inserted into the rotation stop groove (17).

3. The electric throttle stop valve with an integrated valve stemless packing according to claim 2, characterized in that The length of the rotation stop groove (17) is greater than the diameter of the first through hole (8).

4. The electric throttle globe valve with an integrated valve stemless packing according to claim 1, characterized in that A motor shaft cavity (19) is arranged at the rear end of the valve core driving screw rod (11), and a key connection is adopted between the motor shaft cavity (19) and the driving motor (13).

5. The electric throttle globe valve with an integrated valve stemless packing according to claim 1, characterized in that An angular contact ball bearing (20) is installed between the valve core driving screw rod (11) and the valve cover (12).

6. The electric throttle globe valve with an integrated valve stemless packing according to claim 1, characterized in that Pressure sensors (16) are respectively communicated with the air inlet passage (5) and the air outlet passage (6), and the pressure sensors (16) are installed on the valve body (1).

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