CN209875967U - An integrated electric throttling stop valve without stem packing - Google Patents

Abstract

The utility model discloses an integrated electric throttling stop valve without valve rod filling, which comprises a throttling stop valve body, wherein the throttling stop 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 arranged in the valve cavity, a valve cover for fixing the valve sleeve is arranged on the valve body, a valve core is arranged in the valve sleeve, a sealing gasket is arranged at the front end of the valve core, a driving cavity is arranged at the rear end of the valve core, a valve core driving lead screw is connected in the driving cavity in a threaded manner, a driving motor is fixedly connected at the rear end of the valve core driving lead screw, the, thereby controlling the opening and closing of the valve, adopting a valve core and transmission mechanism integrated valve rod-free motion mechanism, canceling the valve rod and sealing packing mechanism of the traditional valve, the actuating mechanism of the valve and the valve can be integrated into a whole, and the whole volume of the electric valve is further reduced.

Description

An integrated electric throttling stop valve without stem packing

technical field

The utility model relates to a cut-off valve, in particular to an integrated electric throttling stop valve without valve rod packing.

Background technique

The valve stem is an important part used for transmission on the valve. One end of the valve stem is connected to the actuator, and the other end is directly connected to the valve core to rotate or move to realize the opening and closing of the valve. The actuator connected to the valve stem is usually some volume. The large drive motor increases the overall volume of the valve and takes up more space. At the same time, the valve stem also needs to maintain good sealing. However, during the long-term use of the valve, the frequent rotation or linear movement of the valve stem will easily cause packing Wear and tear will reduce the sealing performance of the valve stem packing and even cause the sealing failure of the packing system, especially for toxic, flammable and explosive media. If the packing system leaks or fails, it will lead to major accidents.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides an integrated electric throttling stop valve without stem packing.

The technical scheme that the utility model solves its technical problem adopts is:

An integrated electric throttle stop valve without valve stem packing, including a throttle stop valve body, the throttle stop valve includes a valve body, and the valve body is provided with a valve cavity, an air inlet and an air outlet. The side wall of the valve chamber is provided with an air inlet passage communicated with the air inlet, the front end of the valve chamber is provided with an air outlet passage communicated with the air outlet, a valve sleeve is installed in the valve chamber, and the valve A valve cover for fixing the valve sleeve is installed on the body, and the position of the valve sleeve corresponding to the air inlet channel is provided with a number of first flow holes, and the position of the valve sleeve corresponding to the outlet channel is provided with a second A flow hole, a valve core is installed in the valve sleeve, a sealing gasket is installed at the front end of the valve core, a driving cavity is provided at the rear end of the valve core, and threads are provided on the inner wall of the driving cavity. A spool driving screw is threaded inside the driving cavity, and a driving motor is fixedly connected to the rear end of the spool driving screw, and the driving motor is fixedly mounted on the valve cover.

The side wall of the valve core is provided with an anti-rotation groove, and the side wall of the valve sleeve is equipped with a valve core anti-rotation pin. After assembly, the end of the valve core anti-rotation pin is inserted into the anti-rotation groove.

The length of the anti-rotation slot is greater than the diameter of the first through hole.

The front end of the spool is provided with a fixing cover for fixing the gasket.

The diameter of the fixed cover is smaller than the diameter of the second through hole, and the diameter of the sealing gasket is larger than the diameter of the second through hole.

The rear end of the valve core driving screw rod is provided with a motor shaft cavity, and the motor shaft cavity is connected with the driving motor by a key.

An angular contact ball bearing is installed between the valve core driving screw rod and the valve cover.

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

The air inlet channel and the air outlet channel are connected with pressure sensors respectively, and the pressure sensors are installed on the valve body.

The beneficial effects of the utility model are: the utility model is threadedly connected with a spool drive screw at the rear end of the spool, and the drive motor rotates the spool drive screw to realize the movement of the spool, thereby controlling the opening and closing of the valve. The stemless movement mechanism of the valve core and the transmission mechanism cancels the valve stem and sealing packing mechanism of the traditional valve, and can integrate the valve actuator with the valve to further reduce the overall volume of the electric valve. Seals are installed between the front end of the valve body, the bonnet and the valve body, and the seals are not easy to wear during the movement of the valve core, which ensures the sealing of the valve and does not leak, and increases the service life of the valve.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic sectional view of the utility model;

Fig. 2 is a schematic cross-sectional view of the valve body;

Fig. 3 is a schematic cross-sectional view of a valve sleeve;

Fig. 4 is the sectional schematic view of spool;

Fig. 5 is a schematic cross-sectional view of the valve core driving screw.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example.

In describing the present utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , are constructed and operated in a specific orientation and therefore cannot be construed as limiting the invention.

Referring to Figures 1 to 5, an integrated electric throttle stop valve without valve stem packing includes a throttle stop valve body, the throttle stop valve includes a valve body 1, and 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 chamber 2 is provided with an air inlet passage 5 communicating with the air inlet 3, and the front end of the valve chamber 2 is provided with an air inlet channel 5 communicating with the air outlet 4 The air outlet passage 6, the valve chamber 2 is equipped with a valve sleeve 7, the valve body 1 is installed with a valve cover 12 for fixing the valve sleeve 7, and the valve sleeve 7 corresponds to the inlet passage 5 There are a number of first flow holes 8 at the position, and the valve sleeve 7 is provided with a second flow hole 15 corresponding to the position of the outlet channel 6. This kind of throttling stop valve is designed with a throttling function on the valve sleeve 7. When the spool 9 moves, the area of the spool part is covered. The size of the area is determined by the position of the spool 9. The flow rate can be adjusted from the maximum to close to zero. A valve is installed in the valve sleeve 7. Core 9, the front end of described spool 9 is equipped with sealing gasket 14, and the rear end of described spool 9 is provided with drive cavity 10, and the inner wall of described drive cavity 10 is provided with screw thread, and described drive cavity 10 internal thread A spool drive screw 11 is connected, and a drive motor 13 is fixedly connected to the rear end of the spool drive screw 11. The drive motor 13 is fixedly mounted on the valve cover 12, and the spool 9 and the transmission mechanism are integrated. The non-stem movement mechanism of the traditional valve cancels the valve stem and sealing packing mechanism of the traditional valve, and can integrate the actuator of the valve with the valve to further reduce the overall volume of the electric valve.

The side wall of the valve core 9 is provided with an anti-rotation groove 17, and the side wall of the valve sleeve 7 is provided with a valve core anti-rotation pin 18. After assembly, the end of the valve core anti-rotation pin 18 is inserted into the anti-rotation pin 18. In the groove 17, the length of the anti-rotation groove 17 is greater than the diameter of the first flow hole 8, so as to ensure that the valve core 9 does not rotate when it moves.

The front end of the valve core 9 is equipped with a fixed cover 21 for fixing the gasket 14, the diameter of the fixed cover 21 is smaller than the diameter of the second flow hole 15, and the diameter of the gasket 14 is larger than the diameter of the gasket 14. The diameter of the second through hole 15, the end face of the second through hole 15 facing the sealing gasket 14 is provided with a sealing seat, when the sealing gasket 14 is in contact with the sealing seat, the valve is closed. Cut-off function, a sealing ring 22 is installed between the valve cover 12 and the valve body 1, and a seal is installed between the front end of the valve core 9 and between the valve cover 12 and the valve body 1, and the seal is on the valve core. 9 It is not easy to wear and tear during the moving process, which ensures the sealing of the valve and does not leak, and increases the service life of the valve.

The rear end of the valve core driving screw 11 is provided with a motor shaft chamber 19, and the motor shaft chamber 19 is connected with the driving motor 13 by a key so that the driving motor 13 does not bear axial force.

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

The inlet passage 5 and the outlet passage 6 are respectively connected with pressure sensors 16, the pressure sensors 16 are installed on the valve body 1, and pressure sensors 16 are installed at the inlet and outlet of the fluid on the valve body 1, In order to send out the differential pressure signal of the inlet/outlet, the control system feeds back to the drive motor 13 according to the pressure signal of the inlet and outlet of the valve, and drives the valve core 9 by controlling the rotation of the motor to realize throttling, pressure regulation, cutoff function.

The above embodiments cannot limit the scope of protection of the present invention, and equivalent modifications and changes made by those in the technical field without departing from the overall concept of the present invention still fall within the scope of the present invention.

Claims (9)

1. An integrated electric throttle stop valve without valve stem packing, including a throttle stop valve body, characterized in that the throttle stop valve includes a valve body (1), and the valve body (1) is provided with a valve chamber (2), air inlet (3) and air outlet (4), the side wall of the valve chamber (2) is provided with an air inlet passage (5) communicating with the air inlet (3), the The front end of the valve chamber (2) is provided with an air outlet channel (6) communicating with the air outlet (4), the valve sleeve (7) is installed in the valve chamber (2), and the valve body (1) is installed There is a valve cover (12) for fixing the valve sleeve (7), the valve sleeve (7) is provided with a number of first flow holes (8) corresponding to the position of the air intake channel (5), the valve The sleeve (7) is provided with a second flow hole (15) corresponding to the position of the air outlet channel (6), and a valve core (9) is installed in the valve sleeve (7), and the front end of the valve core (9) A sealing gasket (14) is installed, the rear end of the valve core (9) is provided with a drive cavity (10), the inner wall of the drive cavity (10) is provided with threads, and the drive cavity (10) is internally threaded A spool driving screw (11) is connected, and the rear end of the spool driving screw (11) is fixedly connected with a driving motor (13), and the driving motor (13) is fixedly installed on the valve cover (12) superior. 2. The integrated electric throttle stop valve without valve stem packing according to claim 1, characterized in that the side wall of the valve core (9) is provided with an anti-rotation groove (17), and the valve sleeve (7 ) is installed with a valve core anti-rotation pin (18), after assembly, the end of the valve core anti-rotation pin (18) is inserted into the anti-rotation groove (17). 3. The integrated electric throttle stop valve without stem packing according to claim 2, characterized in that the length of the anti-rotation groove (17) is greater than the diameter of the first flow hole (8). 4. The integrated electric throttle stop valve without valve stem packing according to claim 1, characterized in that the front end of the valve core (9) is equipped with a fixed cover (21) for fixing the gasket (14) ). 5. The integrated electric throttle stop valve without stem packing according to claim 4, characterized in that the diameter of the fixed cover (21) is smaller than the diameter of the second flow hole (15), and the The diameter of the sealing gasket (14) is larger than the diameter of the second through hole (15). 6. The integrated electric throttle stop valve without stem packing according to claim 1, characterized in that the rear end of the valve core driving screw (11) is provided with a motor shaft cavity (19), and the motor The shaft cavity (19) is connected with the drive motor (13) by a key. 7. The integrated electric throttle valve without stem packing according to claim 1, characterized in that an angular contact ball is installed between the valve core driving screw (11) and the valve cover (12) bearing (20). 8 . The integrated electric throttle stop valve without stem packing according to claim 1 , characterized in that a sealing ring ( 22 ) is installed between the valve cover ( 12 ) and the valve body ( 1 ). 9. The integrated electric throttle stop valve without stem packing according to claim 1, characterized in that the inlet passage (5) and the outlet passage (6) are respectively connected with pressure sensors (16), and the A pressure sensor (16) is installed on the valve body (1).