Automatic valve device with water hammer protection function

Abstract

The invention discloses an automatic valve device with a water hammer protection function. The automatic valve device comprises a valve body, the two ends of the valve body are fixedly connected with conveying pipes, the outer sides of the two conveying pipes are fixedly connected with quick-assembly flanges, the interior of the valve body is movably connected with a ball, a flow channel is formed in the middle of the ball, and a lock matching groove A is formed in the top end of the ball; the supporting assembly is fixedly connected to the middle of the top end of the valve body, a valve rod is arranged in the supporting assembly, the bottom end of the valve rod is fixedly connected with a clamping block A, and the clamping block A is connected with the lock matching groove A in a clamped mode; the positioning frame is fixedly connected to the top end of the valve body, and a transmission box is fixedly connected to the top end of the positioning frame. Through structural cooperation of the transmission assembly, the closing time of the ball body can be prolonged in the later period of closing of the ball body, so that pressure impact generated by sudden change of the flow velocity of fluid is reduced, the water hammer effect is avoided, and the overall service life is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic valves, and in particular to an automatic valve device with a water hammer protection function. Background Art

[0002] An automatic valve is a core control device in a fluid transportation system. By changing the passage cross-section or the direction of the medium flow, it realizes the on-off of the fluid in the pipeline, the flow direction control, and the parameter adjustment. Its structure usually consists of a valve body, a closing member, a driving device, and a sealing assembly.

[0003] However, in the traditional technology, when the automatic valve closes, due to the too fast speed and the influence of the sudden change in the fluid flow rate, it is extremely easy to generate a large pressure shock inside the valve, resulting in the water hammer effect, which greatly affects the overall service life.

[0004] Therefore, the present invention provides an automatic valve device with a water hammer protection function to solve the above problems. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automatic valve device with a water hammer protection function, which solves the above problems.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: An automatic valve device with a water hammer protection function, comprising:

[0007] A valve body, both ends of the valve body are fixedly connected with transmission pipes, quick-install flanges are fixedly connected to the outer sides of the two transmission pipes, a sphere is movably connected inside the valve body, a flow channel is opened in the middle of the sphere, and a mating lock groove A is opened at the top of the sphere;

[0008] A support assembly, the support assembly is fixedly connected to the middle of the top of the valve body, a valve rod is arranged inside the support assembly, a block A is fixedly connected to the bottom end of the valve rod, and the block A is in snap connection with the mating lock groove A;

[0009] A positioning frame, the positioning frame is fixedly connected to the top of the valve body, a transmission box is fixedly connected to the top of the positioning frame, a transmission assembly is arranged inside the transmission box, and the transmission assembly is used to cooperate with the valve rod to drive the sphere to open and close.

[0010] Preferably, the support assembly includes:

[0011] A limiting cylinder, a notch is opened on one side of the limiting cylinder, one end of the notch is connected with an unlocking arc plate through a rotating shaft, assembly plates are fixedly connected to the ends of the limiting cylinder and the unlocking arc plate far away from the rotating shaft, and the two assembly plates are connected by bolts;

[0012] Sealing strip, a plurality of sealing grooves are provided on the inner sides of the limiting cylinder and the unlocking arc plate, and the sealing strip is assembled inside the sealing grooves.

[0013] Preferably, the transmission assembly includes:

[0014] A hollow shaft rod A, the hollow shaft rod A is vertically rotatably connected inside the transmission box, and a transmission worm wheel is fixedly connected to the outer side of the hollow shaft rod A;

[0015] An extension frame, the extension frame is fixedly connected to one end of the transmission box close to the valve stem, a transmission screw rod is vertically rotatably connected inside the extension frame, and a push plate is threadedly connected to the outer side of the transmission screw rod;

[0016] A linkage shaft rod, the linkage shaft rod is vertically rotatably connected to one end of the push plate, a plurality of linkage bars are fixedly connected to the outer side of the linkage shaft rod, an assembly groove is provided on the inner wall of the hollow shaft rod A, and the linkage bar is also slidably connected inside the corresponding assembly groove. A block B is fixedly connected to the bottom end of the linkage shaft rod, a lock matching groove B is provided at the top end of the valve stem, and the block B is also snap-connected to the lock matching groove B;

[0017] A central shaft rod, the central shaft rod is horizontally rotatably connected inside the transmission box, a transmission worm is fixedly connected to one end of the central shaft rod, and the hollow shaft rod A is meshed with the transmission worm wheel;

[0018] A speed change assembly, the speed change assembly is assembled inside the transmission box for slowing down the closing speed of the sphere in the later stage.

[0019] Preferably, the speed change assembly includes:

[0020] A transmission motor, the transmission motor is fixedly connected to one end of the transmission box, an output shaft rod is fixedly connected to the output end of the transmission motor, and a limiting strip is fixedly connected to the outer side of the output shaft rod;

[0021] An electric push rod, the electric push rod is fixedly connected to one end of the transmission box, a displacement push plate is fixedly connected to the output end of the electric push rod, a hollow shaft rod B is rotatably connected to one end of the displacement push plate, and the hollow shaft rod B is also slidably connected to the output shaft rod and the limiting strip. An incomplete gear and a transmission spur gear are fixedly connected to the outer side of the hollow shaft rod B, a reduction spur gear is fixedly connected to the outer side of the central shaft rod, and both the incomplete gear and the transmission spur gear are meshed with the reduction spur gear.

[0022] Preferably, the cross-sectional shapes of the lock matching groove A and the block A are both polygons.

[0023] Preferably, support grooves are provided in the middle of the inner sides of the limiting cylinder and the unlocking arc plate, and alloy balls are movably connected inside each support groove.

[0024] Preferably, a support hole is formed at one end of the push plate, and the bottom end of the linkage shaft rod is connected to the inside of the support hole through a ball bearing.

[0025] Preferably, a stability plate is fixedly connected inside the transmission box. The end of the output shaft rod away from the transmission motor is also rotatably connected to the stability plate. A guide rod is fixedly connected to the stability plate, and the displacement push plate is also slidably connected to the outside of the guide rod.

[0026] Preferably, a linkage groove is fixedly connected to the inner wall of the hollow shaft rod B, and the limit strip is slidably connected to the inside of the linkage groove.

[0027] Preferably, the diameter of the transmission spur gear is smaller than the diameter of the reduction spur gear.

[0028] Beneficial effects

[0029] The present invention provides an automatic valve device with a water hammer protection function. Compared with the prior art, it has the following beneficial effects:

[0030] The automatic valve device with a water hammer protection function can, through the structural cooperation of the transmission components, extend the closing time in the later stage of the sphere closing, thereby reducing the pressure impact caused by the sudden change of the fluid flow rate, avoiding the occurrence of the water hammer effect, and greatly improving the overall service life.

[0031] The automatic valve device with a water hammer protection function can, through the combined assembly of the sphere, the mating lock groove A and the linkage shaft rod, quickly replace the valve stem when it is damaged, making the whole more convenient. Brief description of the drawings

[0032] Figure 1 is the overall structural schematic diagram of the present invention;

[0033] Figure 2 is the internal structural schematic diagram of the valve body of the present invention;

[0034] Figure 3 is the structural schematic diagram of the support component of the present invention;

[0035] Figure 4 is the internal structural schematic diagram of the transmission box of the present invention;

[0036] Figure 5 is the separated structural schematic diagram of the hollow shaft rod A and the linkage shaft rod of the present invention;

[0037] Figure 6 is the transmission structural schematic diagram of the transmission worm of the present invention;

[0038] Figure 7 is the present invention Figure 6A partial enlarged view of point A in the middle;

[0039] Figure 8 It is a schematic diagram of the assembly structure of the valve stem of the present invention.

[0040] In the figure, 1. valve body; 2. transmission pipe; 3. quick-release flange; 4. sphere; 5. locking groove A; 6. support assembly; 7. valve stem; 8. clamping block A; 9. positioning frame; 10. transmission box; 11. transmission assembly; 12. limiting cylinder; 13. unlocking arc plate; 14. assembly plate; 15. sealing strip; 16. hollow shaft A; 17. transmission worm gear; 18. extension frame; 19. transmission screw; 20. push plate; 21. linkage shaft; 22. linkage strip; 23. clamping block B; 24. locking groove B; 25. center shaft; 26. transmission worm; 27. transmission motor; 28. output shaft; 29. limiting strip; 30. electric push rod; 31. displacement push plate; 32. hollow shaft B; 33. incomplete gear; 34. transmission spur gear; 35. reduction spur gear. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] Example 1:

[0043] See also Figures 1-8 , an automatic valve device with water hammer protection function, comprising:

[0044] The valve body 1 has a transmission pipe 2 fixedly connected to both ends of the valve body 1. The outer sides of the two transmission pipes 2 are fixedly connected to the quick-install flange 3. The interior of the valve body 1 is movably connected to the ball 4. The middle of the ball 4 is provided with a flow channel, and the top of the ball 4 is provided with a locking groove A5.

[0045] Support assembly 6, support assembly 6 is fixedly connected to the middle part of the top of valve body 1, and a valve stem 7 is provided inside support assembly 6. The bottom end of valve stem 7 is fixedly connected to a clamping block A8, and the clamping block A8 is clamped and connected with the locking groove A5;

[0046] Positioning frame 9, positioning frame 9 is fixedly connected to the top of valve body 1, and the top of positioning frame 9 is fixedly connected to transmission box 10, and transmission assembly 11 is provided inside transmission box 10, and transmission assembly 11 is used to cooperate with valve stem 7 to drive ball 4 to open and close;

[0047] In this embodiment, the cross-sectional shapes of the lock-matching groove A5 and the block A8 are both polygons. Due to the structural characteristics of the lock-matching groove A5 and the block A8, when the block A8 is moved into the lock-matching groove A5, the block A8 can be prevented from idling inside the lock-matching groove A5, thereby ensuring the opening and closing stability of the sphere 4;

[0048] The support assembly 6 includes:

[0049] A limit cylinder 12, with a notch opened on one side of the limit cylinder 12. One end of the notch is connected to an unlocking arc plate 13 through a rotating shaft. Both the limit cylinder 12 and the unlocking arc plate 13 are fixedly connected with assembly plates 14 at the ends away from the rotating shaft, and the two assembly plates 14 are connected by bolts;

[0050] A sealing strip 15. A plurality of sealing grooves are opened on the inner sides of the limit cylinder 12 and the unlocking arc plate 13, and the sealing strip 15 is assembled inside the sealing grooves;

[0051] In this embodiment, through holes are opened at the top and bottom of the assembly plate 14 for avoiding the bolts;

[0052] In this embodiment, support grooves are opened in the middle of the inner sides of the limit cylinder 12 and the unlocking arc plate 13, and alloy balls are movably connected inside each support groove. Through the setting of the support grooves, the alloy balls can be stably assembled. And since the valve stem 7 is limited between the limit cylinder 12 and the unlocking arc plate 13, when the valve stem 7 rotates, the loss during the rotation of the valve stem 7 can be reduced by means of the alloy balls;

[0053] Embodiment Two:

[0054] Please refer to Figures 1-8 , this embodiment provides a technical solution on the basis of Embodiment One: The transmission assembly 11 includes:

[0055] A hollow shaft rod A16, which is vertically rotatably connected inside the transmission box 10. A transmission worm wheel 17 is fixedly connected to the outside of the hollow shaft rod A16;

[0056] An extension frame 18, which is fixedly connected to one end of the transmission box 10 close to the valve stem 7. A transmission screw rod 19 is vertically rotatably connected inside the extension frame 18, and a push plate 20 is threadedly connected to the outside of the transmission screw rod 19;

[0057] A linkage shaft rod 21, which is vertically rotatably connected to one end of the push plate 20. A plurality of linkage bars 22 are fixedly connected to the outside of the linkage shaft rod 21. An assembly groove is opened on the inner wall of the hollow shaft rod A16, and the linkage bars 22 also slide inside the corresponding assembly grooves. A block B23 is fixedly connected to the bottom end of the linkage shaft rod 21, and a lock-matching groove B24 is opened at the top end of the valve stem 7, and the block B23 is also clamped and connected to the lock-matching groove B24;

[0058] The central shaft rod 25 is horizontally and rotatably connected inside the transmission box 10. One end of the central shaft rod 25 is fixedly connected with a transmission worm 26, and the hollow shaft rod A16 is meshed with the transmission worm wheel 17;

[0059] A speed change assembly is assembled inside the transmission box 10 and is used to slow down the closing speed of the sphere 4 in the later stage;

[0060] In this embodiment, the extension frame 18 is of a U-shaped structure. Due to the structural characteristics of the extension frame 18, the top and bottom ends of the transmission screw rod 19 can be assembled synchronously, ensuring the stability of the transmission of the transmission screw rod 19;

[0061] In this embodiment, a guide rod is vertically and fixedly connected to the inner side of the extension frame 18, and the pushing plate 20 is also slidably connected to the guide rod. Through the arrangement of the guide rod, the displacement of the pushing plate 20 can be limited to prevent the pushing plate 20 from rotating along with the transmission screw rod 19;

[0062] In this embodiment, a handle is fixedly connected to the bottom end of the transmission screw rod 19, and anti-slip lines are provided on the handle;

[0063] In this embodiment, a support hole is provided at one end of the pushing plate 20, and the bottom end of the linkage shaft rod 21 is connected to the inside of the support hole through a ball bearing. Through the arrangement of the support hole, the linkage shaft rod 21 can be stably assembled, and in combination with the arrangement of the ball bearing, the smoothness of the rotation of the linkage shaft rod 21 can be improved;

[0064] The speed change assembly includes:

[0065] A drive motor 27 is fixedly connected to one end of the transmission box 10. The output end of the drive motor 27 is fixedly connected with an output shaft rod 28, and a limiting strip 29 is fixedly connected to the outer side of the output shaft rod 28;

[0066] An electric push rod 30 is fixedly connected to one end of the transmission box 10. The output end of the electric push rod 30 is fixedly connected with a displacement push plate 31. One end of the displacement push plate 31 is rotatably connected with a hollow shaft rod B32, and the hollow shaft rod B32 is also slidably connected to the output shaft rod 28 and the limiting strip 29. An incomplete gear 33 and a transmission spur gear 34 are fixedly connected to the outer side of the hollow shaft rod B32, and a reduction spur gear 35 is fixedly connected to the outer side of the central shaft rod 25, and both the incomplete gear 33 and the transmission spur gear 34 are meshed with the reduction spur gear 35;

[0067] In this embodiment, a stability plate is fixedly connected inside the transmission case 10. One end of the output shaft rod 28 away from the transmission motor 27 is also rotatably connected to the stability plate. A guide rod is fixedly connected to the stability plate, and the displacement push plate 31 is also slidably connected to the outside of the guide rod. Through the setting of the stability plate, the output shaft rod 28 can be supported assistantly to prevent the output shaft rod 28 from jittering up and down when rotating. And in cooperation with the setting of the guide rod, the displacement of the displacement push plate 31 can be guided to prevent the displacement push plate 31 from rotating uncontrollably;

[0068] In this embodiment, a linkage groove is fixedly connected to the inner wall of the hollow shaft rod B32, and the limiting strip 29 is slidably connected inside the linkage groove. Through the setting of the communication groove, the limiting strip 29 can limit the displacement of the hollow shaft rod B32, and when the output shaft rod 28 rotates, the hollow shaft rod B32 can be driven to rotate synchronously by means of the limiting strip 29;

[0069] In this embodiment, the diameter of the transmission spur gear 34 is smaller than that of the reduction spur gear 35. Through the change of the diameters of the transmission spur gear 34 and the reduction spur gear 35, the rotation speed of the central shaft rod 25 can be effectively reduced;

[0070] In this embodiment, by precisely controlling the transmission ratios of the incomplete gear 33, the transmission spur gear 34, the reduction spur gear 35, the transmission worm 26 and the transmission worm gear 17, when the transmission spur gear 34 rotates one circle, under the linkage of the transmission worm 26 and the transmission worm gear 17, the hollow shaft rod A16 will be driven to rotate 35 degrees. And after the transmission spur gear 34 rotates two circles, the transmission spur gear 34 is separated from the reduction spur gear 35 until the incomplete gear 33 meshes with the reduction spur gear 35, prompting the incomplete gear 33 to intermittently mesh with the reduction spur gear 35. When the incomplete gear 33 rotates one circle, the hollow shaft rod A16 rotates 1 degree, so as to control the rotation speed in the later stage of the closing of the sphere 4 and prevent the occurrence of the water hammer effect.

[0071] Meanwhile, the content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0072] Working principle: First, the valve body 1 is assembled between two external pipes with the help of the transmission pipe 2. When the ball 4 needs to be closed, the transmission motor 27 is started to drive the output shaft 28 to rotate two circles. With the help of the connection between the output shaft 28 and the hollow shaft B32, the hollow shaft B32 can be driven to rotate synchronously with the help of the limit bar 29, prompting the transmission spur gear 34 to shift the reduction spur gear 35, and then driving the transmission worm 26 to rotate through the central shaft 25, prompting the transmission worm 26 to shift the transmission worm gear 17. By controlling the transmission ratio between the transmission spur gear 34, the reduction spur gear 35, the transmission worm 26 and the transmission worm gear 17, for every rotation of the transmission spur gear 34, the hollow shaft A16 will drive the ball 4 to rotate thirty-five degrees through the valve stem 7, so that the flow path of the ball 4 is away from the flow direction of the liquid in the transmission pipe 2;

[0073] When the transmission spur gear 34 rotates two circles, the electric push rod 30 is started to push the displacement push plate 31 to move linearly, causing the hollow shaft B32 to move along the output shaft 28, driving the transmission spur gear 34 to disengage from the reduction spur gear 35 and connecting the incomplete gear 33 to the reduction spur gear 35. By controlling the transmission ratio among the incomplete gear 33, the reduction spur gear 35, the transmission worm 26 and the transmission worm wheel 17, when the incomplete gear 33 rotates one circle, the hollow shaft A16 will drive the ball 4 to rotate one degree through the valve stem 7, thereby slowing down the rotation speed of the ball 4. By extending the closing time, the pressure shock caused by the sudden change in fluid flow rate is reduced, thereby preventing the occurrence of water hammer effect.

[0074] When the valve stem 7 is damaged, first remove the bolts connecting the unlocking arc plate 13 and the limiting cylinder 12, and pull the unlocking arc plate 13 to make it flip over under the support of the rotating shaft to expose the valve stem 7, and rotate the transmission screw 19. Under the connection between the transmission screw 19 and the pushing plate 20, the pushing plate 20 can drive the linkage shaft 21 to move vertically along the transmission screw 19 until the block B23 moves out from the locking groove B24. Then pull up the valve stem 7 to disengage the block A8 from the locking groove A5, and then the valve stem 7 can be pulled out, and then the valve stem 7 can be replaced.

[0075] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0076] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic valve device with a water hammer protection function, characterized in that: Comprising: A valve body (1), both ends of the valve body (1) are fixedly connected with transmission pipes (2), quick-installation flanges (3) are fixedly connected to the outer sides of the two transmission pipes (2), a sphere (4) is movably connected inside the valve body (1), a flow channel is provided in the middle of the sphere (4), and a locking groove A (5) is provided at the top end of the sphere (4); A support assembly (6), the support assembly (6) is fixedly connected to the middle of the top end of the valve body (1), a valve rod (7) is arranged inside the support assembly (6), a block A (8) is fixedly connected to the bottom end of the valve rod (7), and the block A (8) is in clamping connection with the locking groove A (5); A positioning frame (9), the positioning frame (9) is fixedly connected to the top end of the valve body (1), a transmission box (10) is fixedly connected to the top end of the positioning frame (9), a transmission assembly (11) is arranged inside the transmission box (10), and the transmission assembly (11) is used to cooperate with the valve rod (7) to drive the sphere (4) to open and close.

2. The automatic valve device with a water hammer protection function according to claim 1, characterized in that: The support assembly (6) includes: A limiting cylinder (12), a notch is provided on one side of the limiting cylinder (12), one end of the notch is connected to an unlocking arc plate (13) through a rotating shaft, assembly plates (14) are fixedly connected to the ends of the limiting cylinder (12) and the unlocking arc plate (13) away from the rotating shaft, and the two assembly plates (14) are connected by bolts; A sealing strip (15), a plurality of sealing grooves are provided on the inner sides of the limiting cylinder (12) and the unlocking arc plate (13), and the sealing strip (15) is assembled inside the sealing grooves.

3. The automatic valve device with a water hammer protection function according to claim 1, characterized in that: The transmission assembly (11) includes: A hollow shaft rod A (16), the hollow shaft rod A (16) is vertically rotatably connected inside the transmission box (10), and a transmission worm gear (17) is fixedly connected to the outer side of the hollow shaft rod A (16); An extension frame (18), the extension frame (18) is fixedly connected to one end of the transmission box (10) close to the valve rod (7), a transmission screw rod (19) is vertically rotatably connected inside the extension frame (18), and a pushing plate (20) is threadedly connected to the outer side of the transmission screw rod (19); A linkage shaft rod (21), the linkage shaft rod (21) is vertically rotatably connected to one end of the pushing plate (20), a plurality of linkage strips (22) are fixedly connected to the outer side of the linkage shaft rod (21), an assembly groove is provided on the inner wall of the hollow shaft rod A (16), and the linkage strip (22) is also slidably connected inside the corresponding assembly groove, a block B (23) is fixedly connected to the bottom end of the linkage shaft rod (21), a locking groove B (24) is provided at the top end of the valve rod (7), and the block B (23) is also in clamping connection with the locking groove B (24); A central shaft rod (25), the central shaft rod (25) is horizontally rotatably connected inside the transmission box (10), a transmission worm (26) is fixedly connected to one end of the central shaft rod (25), and the hollow shaft rod A (16) is meshed with the transmission worm gear (17); A speed change assembly, the speed change assembly is assembled inside the transmission box (10) for slowing down the closing speed of the sphere (4) in the later stage.

4. The automatic valve device with a water hammer protection function according to claim 3, characterized in that: The speed change assembly includes: The drive motor (27), the drive motor (27) is fixedly connected to one end of the drive box (10), the output end of the drive motor (27) is fixedly connected with an output shaft rod (28), and a limiting strip (29) is fixedly connected to the outer side of the output shaft rod (28); The electric push rod (30), the electric push rod (30) is fixedly connected to one end of the drive box (10), the output end of the electric push rod (30) is fixedly connected with a displacement push plate (31), one end of the displacement push plate (31) is rotatably connected with a hollow shaft rod B (32), and the hollow shaft rod B (32) is also slidably connected to the output shaft rod (28) and the limiting strip (29). An incomplete gear (33) and a transmission spur gear (34) are fixedly connected to the outer side of the hollow shaft rod B (32), a reduction spur gear (35) is fixedly connected to the outer side of the central shaft rod (25), and both the incomplete gear (33) and the transmission spur gear (34) are meshed and connected with the reduction spur gear (35).

5. The automatic valve device with a water hammer protection function according to claim 1, characterized in that: The cross-sectional shapes of the lock matching groove A (5) and the block A (8) are both polygons.

6. The automatic valve device with a water hammer protection function according to claim 2, characterized in that: Support grooves are respectively formed in the middle parts of the inner sides of the limiting cylinder (12) and the unlocking arc plate (13), and alloy balls are movably connected inside each support groove.

7. The automatic valve device with a water hammer protection function according to claim 3, characterized in that: A support hole is formed at one end of the pushing plate (20), and the bottom end of the linkage shaft rod (21) is connected to the inside of the support hole through a ball bearing.

8. The automatic valve device with a water hammer protection function according to claim 4, characterized in that: A stabilizing plate is fixedly connected inside the drive box (10), the end of the output shaft rod (28) away from the drive motor (27) is also rotatably connected to the stabilizing plate, a guide rod is fixedly connected to the stabilizing plate, and the displacement push plate (31) is also slidably connected to the outside of the guide rod.

9. The automatic valve device with a water hammer protection function according to claim 4, characterized in that: A linkage groove is fixedly connected to the inner wall of the hollow shaft rod B (32), and the limiting strip (29) is slidably connected to the inside of the linkage groove.

10. The automatic valve device with a water hammer protection function according to claim 4, characterized in that: The diameter of the transmission spur gear (34) is smaller than the diameter of the reduction spur gear (35).

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