Buffer type electric control valve

Abstract

The utility model discloses a buffer type electric control valve, which relates to the technical field of valves, and comprises a valve body, the valve body is provided with an inlet channel and an outlet channel, a valve cover is arranged on the valve body, a valve seat, a valve core and a valve rod are arranged in the valve body, an adjusting sleeve is arranged between the valve core and the valve body, the valve core is connected with the valve rod, and the valve rod is connected with the valve cover. The upper end of the valve rod extends out of the valve deck to be connected with an electric actuating mechanism, the valve element moves up and down in the adjusting sleeve, a connecting pipe is arranged on the outer side of the inlet channel, a buffering piece is arranged in the connecting pipe, a buffering flow channel is formed in the middle of the buffering piece, and a plurality of check blocks are arranged in the buffering flow channel. And the stop blocks are uniformly distributed along the buffer runner in an up-down staggered manner. According to the utility model, media entering the valve body can be effectively throttled and decompressed, water hammer is avoided, various sensors in the valve body are protected, and normal operation of the valve is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and particularly relates to an electric control valve. Background Art

[0002] The electric control valve is an important actuator unit instrument in industrial automation process control. With the increasing automation level in the industrial field, it is being more and more applied in various industrial production fields. The existing electric control valve controls the downstream flow or pressure of the valve by setting a number of adjusting holes arranged in an array on the adjusting sleeve and shielding the area of the adjusting holes by the valve core. By setting a number of sensors in the valve body, the valve is driven to change the cross-sectional area between the valve core and the valve seat to control process parameters such as the flow rate, temperature, and pressure of the pipeline medium by receiving the signals of the sensors, so as to achieve the automatic adjustment function. Since various sensors are arranged in the valve body, when the control valve is closed, water hammer is likely to affect or even damage these sensors, resulting in the failure of the control valve and affecting the normal operation of the valve. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the utility model provides a buffer type electric control valve.

[0004] The technical solution provided by the utility model is as follows:

[0005] A buffer type electric control valve includes a valve body, the valve body is provided with an inlet passage and an outlet passage, the valve body is provided with a valve cover, a valve seat, a valve core, and a valve rod are arranged in the valve body, an adjusting sleeve is arranged between the valve core and the valve body, the valve core is connected to the valve rod, the upper end of the valve rod extends out of the valve cover and is connected to an electric actuator, the valve core moves up and down in the adjusting sleeve, a connecting pipe is arranged outside the inlet passage, a buffer member is arranged in the connecting pipe, a buffer flow passage is arranged in the middle of the buffer member, and a number of blocking blocks are arranged in the buffer flow passage, and the blocking blocks are evenly distributed up and down in a staggered manner along the buffer flow passage.

[0006] A connecting flange is arranged at the end of the connecting pipe, and the connecting pipe is detachably connected to the valve body by bolts.

[0007] A sealing gasket is arranged between the connecting pipe and the valve body.

[0008] The longitudinal section of the blocking block is triangular, the side surface of the blocking block is a pressure-bearing guiding inclined surface, and the pressure-bearing guiding inclined surface forms an angle of 60° with the central axis of the buffer flow passage.

[0009] Internal threads are arranged on the inner wall of the connecting pipe, and the buffer member is detachably connected to the connecting pipe by threads.

[0010] A limiting inclined surface is arranged on the inner wall of the adjusting sleeve, and a limiting protrusion adapted to the limiting inclined surface is arranged on the outer surface of the valve core.

[0011] A bracket is provided between the valve cover and the electric actuator. A travel scale is provided on the bracket, and a travel pointer is provided on the valve stem.

[0012] The valve cover and the valve body are detachably connected by bolts, and a sealing gasket is provided between the valve cover and the valve body.

[0013] A packing assembly is provided between the valve cover and the valve stem. The packing assembly includes packing, a packing pressing plate, and a packing gland. The packing gland is connected to the valve cover by bolts to compress the packing pressing plate, and then compress the packing.

[0014] The beneficial effects of the present utility model: By providing a connecting pipe outside the inlet passage of the valve body, a buffer member is provided in the connecting pipe, a buffer flow channel is provided in the middle of the buffer member, and a plurality of blocking blocks are provided in the buffer flow channel. The blocking blocks are evenly distributed up and down in a staggered manner along the buffer flow channel. After the medium is buffered by the buffer member, it can effectively throttle and decompress, avoid water hammer, protect various sensors in the valve body, and ensure the normal operation of the valve. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model. Detailed Embodiment

[0016] The embodiments of the present utility model will be further described below in conjunction with the drawings.

[0017] As Figure 1 shown, a buffer-type electric control valve includes a valve body 1. The valve body 1 is provided with an inlet passage and an outlet passage. A valve cover 6 is provided on the valve body 1. A valve seat 2, a valve core 3, and a valve stem 5 are provided in the valve body 1. An adjusting sleeve 4 is provided between the valve core 3 and the valve body 1. The valve core 3 is connected to the valve stem 5. The upper end of the valve stem 5 extends out of the valve cover 6 and is connected to the electric actuator 12. The valve core 3 moves up and down in the adjusting sleeve 4. By driving the valve stem 5 to rotate through the electric actuator 12, the valve core 4 is driven to move up and down in the adjusting sleeve 3 to shield the area of the adjusting hole on the adjusting sleeve 4 to control the downstream flow or pressure of the valve. A limiting inclined surface 21 is provided on the inner wall of the adjusting sleeve 4, and a limiting protrusion adapted to the limiting inclined surface 21 is provided on the outer surface of the valve core 3, so that the valve core 3 will not move down excessively when moving up and down in the adjusting sleeve 4.

[0018] In this embodiment, a connecting pipe 22 is provided outside the inlet passage of the valve body 1. A buffer member 25 is provided inside the connecting pipe 22. The inner wall of the connecting pipe 22 is provided with internal threads. The buffer member 25 is detachably connected to the connecting pipe 22 by threads. A connecting flange is provided at the end of the connecting pipe 22. The connecting pipe 22 is detachably connected to the valve body by bolts 23, which is convenient for disassembly and assembly. A sealing gasket is provided between the connecting pipe 22 and the valve body 1 to prevent the medium from leaking from the mating part between the connecting pipe 22 and the valve body 1. A buffer flow passage 24 is provided in the middle of the buffer member 25. A number of baffle blocks 26 are provided in the buffer flow passage 24. The longitudinal section of the baffle block 26 is triangular. The side surface of the baffle block 26 is a pressure-bearing guiding inclined surface 27. The pressure-bearing guiding inclined surface 27 forms an angle of 60° with the central axis of the buffer flow passage 24. The baffle blocks 26 are evenly distributed up and down in a staggered manner along the buffer flow passage 24. When the medium passes through the buffer flow passage 24, the pressure-bearing guiding inclined surface 27 guides the medium to flow tortuously in the buffer flow passage 24 for step-by-step pressure reduction, so that the medium is effectively throttled, avoiding the water hammer occurring during the opening and closing of the valve, preventing the damage of the sensor inside the valve body caused by the water hammer, and ensuring the normal operation of the valve.

[0019] In this embodiment, a bracket 13 is provided between the valve cover 6 and the electric actuator 12. A travel scale 11 is provided on the bracket 13. A travel pointer 10 is provided on the valve stem 5, which is used to indicate the movement stroke of the valve stem so as to judge the opening degree of the valve and achieve precise adjustment.

[0020] In this embodiment, the valve cover 6 and the valve body 1 are detachably connected by bolts, which is convenient for the installation and subsequent maintenance of the valve. A sealing gasket is provided between the valve cover 6 and the valve body 1 to prevent the medium from leaking from the mating part between the valve cover 2 and the valve body 1.

[0021] In this embodiment, a packing assembly is provided between the valve cover 6 and the valve stem 5. The packing assembly includes packing 7, a packing pressing plate 8, and a packing gland 9. The packing gland 9 is connected to the valve cover 6 by bolts to press the packing pressing plate 8, and then press the packing 7, preventing the medium from leaking from the gap between the valve cover 6 and the valve stem 5 and ensuring the reliability of the seal.

[0022] The embodiments should not be construed as limiting the present invention. Any non-creative improvement based on the spirit of the present invention should be regarded as within the protection scope of the present invention.

Claims

1. A buffer type electric regulating valve, comprising a valve body, the valve body is provided with an inlet channel and an outlet channel, the valve body is provided with a valve cover, the valve body is provided with a valve seat, a valve core, and a valve stem, an adjusting sleeve is provided between the valve core and the valve body, the valve core is connected to the valve stem, the upper end of the valve stem extends out of the valve cover and is connected to the electric actuator, the valve core moves up and down in the adjusting sleeve, and is characterized in that: A connecting pipe is provided outside the inlet channel, a buffer is provided inside the connecting pipe, a buffer channel is provided in the middle of the buffer, a plurality of blocks are provided in the buffer channel, the blocks are evenly distributed up and down along the buffer channel, and the longitudinal section of the blocks is triangular.

2. A buffer type electric regulating valve according to claim 1, characterized in that: A connecting flange is provided at the end of the connecting pipe, and the connecting pipe is detachably connected to the valve body by bolts.

3. A buffer type electric regulating valve according to claim 2, characterized in that: A sealing gasket is provided between the connecting pipe and the valve body.

4. A buffer type electric regulating valve according to claim 1, characterized in that: The side surface of the stopper is a pressure-bearing guide inclined surface, and the pressure-bearing guide inclined surface forms an angle of 60° with the central axis of the buffer flow channel.

5. The buffer type electric regulating valve according to claim 1, characterized in that: The inner wall of the connecting pipe is provided with internal threads, and the buffer component is detachably connected to the connecting pipe through the threads.

6. The electric regulating valve according to claim 1, characterized in that: The inner wall of the regulating sleeve is provided with a limiting inclined surface, and the outer surface of the valve core is provided with a limiting protrusion matched with the limiting inclined surface.

7. The electric regulating valve according to claim 1, characterized in that: A bracket is arranged between the valve cover and the electric actuator, a travel scale is arranged on the bracket, and a travel pointer is arranged on the valve stem.

8. The electric regulating valve according to claim 1, characterized in that: The valve cover is detachably connected to the valve body via bolts, and a sealing gasket is provided between the valve cover and the valve body.

9. The electric regulating valve according to claim 1, characterized in that: A packing assembly is provided between the valve cover and the valve stem, and the packing assembly includes packing, a packing pressure plate, and a packing pressure cover. The packing pressure cover is connected to the valve cover by bolts to compress the packing pressure plate and further compress the packing.

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