Scouring-resistant valve body structure

Abstract

The invention discloses a washing-resistant valve body structure, relates to the field of valve bodies, and solves the problems that when an existing washing-resistant valve body structure is used, only one set of valve clacks are arranged to be continuously used in the valve body structure, the valve clacks are prone to abrasion, and the service life is short. The washing-resistant valve body structure comprises a valve body, an opening and closing mechanism, a switching mechanism and a sealing mechanism; the opening and closing mechanism comprises a mounting block, a valve clack, an input pipe and a connecting ring, and the sealing mechanism comprises a sealing ring. When the knob is rotated, the mounting block is controlled by the opening and closing mechanism to drive the valve clack to ascend and descend, the communication state between the connecting ring and the valve cavity is controlled, and when the mounting block moves to a set position, the switching mechanism is in linkage with the mounting block to rotate by a set angle; the position of the valve clack corresponding to the connecting ring is switched, the service life of the valve body is prolonged, when the valve clack is in butt joint with the connecting ring, the sealing mechanism controls the sealing ring to abut against the outer wall of the valve clack, the gap between the valve clack and the connecting ring is reduced, and the overall sealing performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve bodies, in particular to a scour-resistant valve body structure. Background Art

[0002] The stop valve plays the role of cutting off the flow of media in the pipeline. Due to its simple structure, short stroke and convenient operation, it is widely used in industries such as oil refining, chemical industry, coal gasification, natural gas, and liquefied petroleum gas. The traditional structure of the stop valve is that the valve disc and the valve seat of the valve body are in contact with the conical surface to form a sealing pair. At the moment of closing and opening the stop valve, due to the narrow flow area, the high-pressure and high-flow medium flows through the sealing pair and directly scours the sealing surface of the valve disc and the valve seat of the valve body. After a period of use, grooves are scoured on the sealing surface, which seriously affects its sealing performance.

[0003] The existing valve body structure generally only uses a set of valve discs to move and control the opening and closing of the pipeline. During the opening and closing process, friction occurs between the side wall of the valve disc and the inner wall of the valve body and is washed by the internal fluid, which can easily cause wear on the surface of the valve disc and affect the sealing performance of the sealing pair. Directly replacing the valve disc is relatively complicated and requires certain professional knowledge. Some valve discs are fixed by welding. Once wear occurs, the valve body needs to be replaced directly, and the cost of use is greatly increased. Summary of the invention

[0004] The object of the present invention is to provide a scour-resistant valve body structure that is convenient for improving the sealing performance of the valve body and the overall service life of the valve disc, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a scour-resistant valve body structure, comprising a valve body, an opening and closing mechanism, a switching mechanism and a sealing mechanism, wherein a valve cavity is provided in the valve body, a knob is provided on the valve body, the opening and closing mechanism comprises a mounting block installed in the valve cavity, a plurality of valve discs are evenly and fixedly connected to the outer wall of the mounting block, an input pipe is connected to the valve body, a first thread groove is provided in the input pipe, a connecting ring is threadedly connected in the first thread groove, the valve disc can be plugged with the inner wall of the connecting ring in a vertical direction, and is used to control the mounting block to drive the valve disc to rise and fall when the knob is turned, Control the connection state between the connecting ring and the valve cavity. The switching mechanism is installed in the valve cavity and is used to link the mounting block to rotate a set angle when the mounting block moves to a set position, switch the position of the valve flap corresponding to the connecting ring, reduce the degree of wear of the single valve flap, and extend the service life of the valve body as a whole. The sealing mechanism includes a sealing ring installed in the connecting ring, which is used to control the sealing ring to resist the outer wall of the valve flap when the valve flap is docked with the connecting ring, reduce the gap between the valve flap and the connecting ring, improve the sealing performance, and facilitate improving the sealing performance of the valve body and the overall service life of the valve flap.

[0006] Preferably, the switching mechanism includes a driving shaft fixedly mounted on the mounting block, both ends of the driving shaft are coaxially fixedly connected with driving gears, and the valve body is provided with a switching member for driving the driving gear to rotate a set angle when the driving gear reaches a set position, thereby completing the switching of the valve flap position. This facilitates the linkage of the mounting block to rotate the set angle when the mounting block moves to the set position, thereby switching the valve flap position corresponding to the connecting ring, reducing the degree of wear of the single valve flap and extending the service life of the valve body as a whole.

[0007] Preferably, the switching member includes two groups of fixed frames fixedly installed inside the valve body, the two groups of fixed frames are symmetrically distributed on both sides of the mounting block, a beveled gear block is slidably connected in the fixed frame in a horizontal direction, one side of the beveled gear block is fixedly connected to a first spring fixedly connected to the fixed frame, and a limit member for limiting the rotation angle of the valve disc each time is provided in the valve cavity, so as to drive the driving gear to rotate the set angle when the driving gear reaches the set position, thereby completing the position switching of the valve disc.

[0008] Preferably, the opening and closing mechanism also includes a lifting frame rotatably connected to both ends of the driving shaft, a lifting groove is provided in the valve body, the lifting frame is slidably connected to the inner wall of the lifting groove, and a driving tube is rotatably connected to the upper side of the lifting frame, and a driving member is provided on the valve body for controlling the lifting frame to lift when the knob is rotated, so as to control the mounting block to drive the valve disc to lift and lower when the knob is rotated, thereby controlling the connection state between the connecting ring and the valve cavity.

[0009] Preferably, the limiting member includes a fixing ring fixedly mounted on both sides of the lifting frame, the inner wall of the fixing ring is evenly provided with multiple groups of elastic metal sheets, both ends of the elastic metal sheet are fixedly connected to the inner wall of the fixing ring, and the side surface of the elastic metal sheet is slidably fitted with the outer wall of the driving gear, so as to facilitate limiting the rotation angle of the valve flap each time.

[0010] Preferably, the driving member includes a fixed tube fixedly mounted on the valve body, the driving tube is movably sleeved with the inner wall of the fixed tube, the outer wall of the driving tube is provided with a second threaded groove threadedly connected to the inner wall of the fixed tube, the bottom of the knob is coaxially fixedly connected to a sealing block rotatably connected to the top of the fixed tube, the bottom of the sealing block is coaxially fixedly connected to a driving rod, a driving groove is provided in the driving tube, the driving rod is slidably connected to the inner wall of the driving groove in a vertical direction, so as to control the lifting and lowering of the lifting frame when the knob is rotated.

[0011] Preferably, the sealing mechanism also includes multiple groups of control rods installed on the connecting ring, the connecting ring is provided with an annular groove, the upper and lower sides of the sealing ring are respectively fixedly connected to the inner wall of the annular groove, and the connecting ring is provided with multiple groups of guide grooves connected to the annular groove, the control rod is slidably connected to the inner wall of the guide groove along the vertical direction, the annular groove is used to store hydraulic oil, the bottom of the control rod is fixedly connected to a second spring fixedly connected to the guide groove, and the input pipe is provided with a connecting piece for improving the replacement efficiency of the sealing ring, so that when the valve disc and the connecting ring are docked, the sealing ring is controlled to contact the outer wall of the valve disc, thereby reducing the gap between the valve disc and the connecting ring and improving the sealing performance.

[0012] Preferably, the connecting member includes a butt joint pipe fixedly mounted on the valve body, the outer wall of the input pipe is provided with a third thread groove threadedly connected to the butt joint pipe, and the upper end of the input pipe is connected to the valve cavity through the connecting ring, so as to improve the efficiency of replacing the sealing ring.

[0013] Preferably, an output pipe is fixedly connected to the side of the valve body, and one end of the output pipe is communicated with the valve cavity to facilitate the delivery and control of the fluid.

[0014] Preferably, the sealing ring is made of elastic rubber material, so that when the hydraulic pressure in the annular groove increases, the middle part of the sealing ring is pushed toward the side of the valve disc for resistance and extrusion, thereby improving the sealing performance.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The erosion-resistant valve body structure provided by the present invention solves the problem that only one group of valve flaps is set for continuous use inside the existing erosion-resistant valve body structure, the valve flaps are easily worn and have a short service life. When the knob is turned, the mounting block is controlled by the opening and closing mechanism to drive the valve flap to rise and fall, thereby controlling the connection state between the connecting ring and the valve cavity. When the mounting block moves to the set position, the switching mechanism links the mounting block to rotate the set angle, and switches the position of the valve flap corresponding to the connecting ring, so that multiple groups of valve flaps are alternately docked and sealed with the connecting ring, thereby reducing the degree of wear of a single valve flap and extending the service life of the valve body as a whole. When the valve flap is docked with the connecting ring, the sealing ring is controlled by the sealing mechanism to contact the outer wall of the valve flap, thereby reducing the gap between the valve flap and the connecting ring and improving the overall sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a partial structural schematic diagram of the opening and closing mechanism of the present invention; Figure 3 for Figure 2 A magnified image of the middle A area; Figure 4 It is a schematic diagram of the local structure of the switching mechanism of the present invention; Figure 5 for Figure 4 Enlarged view of area B; Figure 6 It is a schematic diagram of the partial structure of the sealing mechanism of the present invention; Figure 7 for Figure 6 Enlarged view of area C in the middle; Figure 8 for Figure 6 Enlarged view of area D in the middle.

[0017] In the figure: 1. valve body; 2. valve chamber; 3. knob; 4. mounting block; 5. valve disc; 6. input pipe; 7. first thread groove; 8. connecting ring; 9. sealing ring; 10. driving shaft; 11. driving gear; 12. switching member; 13. fixing frame; 14. bevel gear block; 15. first spring; 16. limit member; 17. lifting frame; 18. lifting groove; 19. driving pipe; 20. driving member; 21. fixing ring; 22. elastic metal sheet; 23. fixing pipe; 24. second thread groove; 25. sealing block; 26. driving rod; 27. driving groove; 28. control rod; 29. ​​annular groove; 30. guide groove; 31. second spring; 32. connecting member; 33. butt tube; 34. third thread groove; 35. output pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0019] Embodiment 1

[0020] See also Figure 1-Figure 8 , a scour-resistant valve body structure shown in the figure includes a valve body 1, an opening and closing mechanism, a switching mechanism and a sealing mechanism. A valve cavity 2 is opened in the valve body 1, a knob 3 is provided on the valve body 1, an output pipe 35 is fixedly connected to the side of the valve body 1, one end of the output pipe 35 is communicated with the valve cavity 2, the opening and closing mechanism includes a mounting block 4 installed in the valve cavity 2, a plurality of valve flaps 5 are evenly and fixedly connected to the outer wall of the mounting block 4, an input pipe 6 is connected to the valve body 1, a first thread groove 7 is opened in the input pipe 6, a connecting ring 8 is threadedly connected in the first thread groove 7, the valve flap 5 can be plugged with the inner wall of the connecting ring 8 in the vertical direction, and is used to control the mounting block 4 to drive the valve flap 5 to rise and fall when the knob 3 is turned, so as to control the connection state between the connecting ring 8 and the valve cavity 2.

[0021] The switching mechanism is installed in the valve cavity 2, and is used for linking the mounting block 4 to rotate a set angle when the mounting block 4 moves to a set position, switching the position of the valve flap 5 corresponding to the connecting ring 8, reducing the degree of wear of the single valve flap 5, and extending the service life of the valve body as a whole. The sealing mechanism includes a sealing ring 9 installed in the connecting ring 8, which is used for controlling the sealing ring 9 to contact the outer wall of the valve flap 5 when the valve flap 5 is docked with the connecting ring 8, thereby reducing the gap between the valve flap 5 and the connecting ring 8 and improving the sealing performance.

[0022] The switching mechanism includes a driving shaft 10 fixedly mounted on the mounting block 4, and both ends of the driving shaft 10 are coaxially fixedly connected with a driving gear 11. The valve body 1 is provided with a switching member 12 for driving the driving gear 11 to rotate a set angle when the driving gear 11 reaches a set position to complete the position switching of the valve disc 5.

[0023] The opening and closing mechanism also includes a lifting frame 17 rotatably connected to both ends of the driving shaft 10, a lifting groove 18 is opened in the valve body 1, the lifting frame 17 is slidably connected to the inner wall of the lifting groove 18, and a driving tube 19 is rotatably connected to the upper side of the lifting frame 17. A driving member 20 is provided on the valve body 1 for controlling the lifting frame 17 to rise and fall when the knob 3 is rotated.

[0024] The driving member 20 includes a fixed tube 23 fixedly mounted on the valve body 1, the driving tube 19 is movably sleeved with the inner wall of the fixed tube 23, the outer wall of the driving tube 19 is provided with a second threaded groove 24 threadedly connected to the inner wall of the fixed tube 23, the bottom of the knob 3 is coaxially fixedly connected to a sealing block 25 rotatably connected to the top of the fixed tube 23, the bottom of the sealing block 25 is coaxially fixedly connected to a driving rod 26, a driving groove 27 is provided in the driving tube 19, and the driving rod 26 is slidably connected to the inner wall of the driving groove 27 along the vertical direction.

[0025] In this embodiment, the sealing block 25 and the driving rod 26 are driven to rotate by rotating the knob 3, and the driving rod 26 drives the outer driving tube 19 to rotate. Under the guiding action of the first thread groove 7, the driving tube 19 is rotated in the fixed tube 23 and the lifting adjustment is completed at the same time. The driving tube 19 drives the lifting frame 17 to lift, and the driving shaft 10 and the mounting block 4 are lifted and lowered together, thereby driving the valve flap 5 to lift and lower, and adjusting the plug-in state between the valve flap 5 and the bottom connecting ring 8. When the valve flap 5 is inserted into the connecting ring 8, the communication state between the input pipe 6 and the valve cavity 2 can be cut off, and the fluid in the input pipe 6 cannot flow into the output pipe 35 through the valve cavity 2. When the valve flap 5 is released from the plug-in state with the connecting ring 8, the fluid in the input pipe 6 can enter the valve cavity 2 through the gap between the valve flap 5 and the connecting ring 8, and then be output through the output pipe 35. The flow rate is determined by the gap between the valve flap 5 and the connecting ring 8, and the gap size is controlled by rotating the knob 3 to make the lifting frame 17 drive the mounting block 4 to move.

[0026] It is worth noting that: when the mounting block 4 moves to the set position, the switching member 12 drives the driving gear 11 to rotate, thereby controlling the driving shaft 10 to drive the mounting block 4 to rotate the set angle, and the position of the valve flap 5 corresponding to the connecting ring 8 can be switched, so that multiple groups of valve flaps 5 are alternately docked and sealed with the connecting ring 8, thereby reducing the wear of a single valve flap 5 and extending the service life of the valve body as a whole. When the valve flap 5 is docked with the connecting ring 8, the sealing ring 9 is controlled by the sealing mechanism to resist the outer wall of the valve flap 5, thereby reducing the gap between the valve flap 5 and the connecting ring 8 and improving the overall sealing performance.

[0027] Embodiment 2

[0028] See also Figure 2-Figure 8 , this embodiment further illustrates the first embodiment, the switching member 12 shown in the figure includes two groups of fixed frames 13 fixedly installed inside the valve body 1, the two groups of fixed frames 13 are symmetrically distributed on both sides of the mounting block 4, a bevel gear block 14 is slidably connected in the horizontal direction in the fixed frame 13, a first spring 15 fixedly connected to the fixed frame 13 is fixedly connected to one side of the bevel gear block 14, a limiter 16 for limiting the rotation angle of the valve disc 5 each time is provided in the valve cavity 2, the limiter 16 includes a fixed ring 21 fixedly installed on both sides of the lifting frame 17, a plurality of groups of elastic metal sheets 22 are evenly provided on the inner wall of the fixed ring 21, both ends of the elastic metal sheet 22 are fixedly connected to the inner wall of the fixed ring 21, and the side surface of the elastic metal sheet 22 is slidably fitted with the outer wall of the driving gear 11.

[0029] In this embodiment, the number of teeth of the driving gear 11 is the same as the number of the valve disc 5 and the position corresponds to that of the valve disc 5. The number of the elastic metal sheets 22 is the same as the number of the valve disc 5 and is evenly distributed on the inner wall of the fixing ring 21, so as to limit the driving gear 11 to a certain extent. When the lifting frame 17 drives the mounting block 4 and the valve disc 5 to move upward, the driving gear 11 conflicts with the bottom inclined surface of the helical gear block 14, pushing the helical gear block 14 to compress the first spring 15. At this time, the driving gear 11 is limited by the elastic metal sheet 22 and will not rotate. When the lifting frame 17 drives the valve disc 5 to move downward, the driving gear 11 The outer wall of 11 is in conflict with the top plane of the bevel gear block 14, which can push the driving gear 11 to rotate the set angle, so that the teeth of the driving gear 11 push the elastic metal sheet 22 and slide along the outer wall of the elastic metal sheet 22 until it rotates to the position between the two adjacent groups of elastic metal sheets 22 and is clamped and fixed. Thereafter, the driving gear 11 rotates to the bottom of the bevel gear block 14, and the driving shaft 10 no longer rotates, so that the position of the valve flap 5 can be adjusted. During the process of the valve flap 5 and the connecting ring 8 being docked and sealed, the valve flap 5 remains relatively stable for plugging and sealing with the connecting ring 8.

[0030] Since the position of the bevel gear block 14 is relatively fixed, only when the valve flap 5 opens a larger flow rate, the driving gear 11 moves as a whole to the upper side of the bevel gear block 14. Thereafter, during the process of closing the valve, the driving gear 11 can be driven by the bevel gear block 14 to rotate and switch the position of the valve flap 5. When the distance between the valve flap 5 and the connecting ring 8 is short, the position of the valve flap 5 will not be switched when the valve is closed. This effectively reduces the switching frequency of the valve flap 5, avoids damage to internal components caused by frequent switching, and can effectively extend the service life of the valve body as a whole and reduce the frequency of replacement.

[0031] Embodiment 3

[0032] See also Figure 4-Figure 8 , this embodiment further illustrates the first embodiment, the sealing mechanism shown in the figure also includes a plurality of control rods 28 mounted on the connecting ring 8, an annular groove 29 is provided on the connecting ring 8, the upper and lower sides of the sealing ring 9 are respectively fixedly connected to the inner wall of the annular groove 29, a plurality of guide grooves 30 connected to the annular groove 29 are provided in the connecting ring 8, the control rod 28 is slidably connected to the inner wall of the guide groove 30 along the vertical direction, the annular groove 29 is used to store hydraulic oil, the bottom of the control rod 28 is fixedly connected to a second spring 31 fixedly connected to the guide groove 30, and a connecting piece 32 for improving the replacement efficiency of the sealing ring 9 is provided on the input pipe 6.

[0033] The connecting piece 32 includes a butt joint 33 fixedly mounted on the valve body 1. The outer wall of the input pipe 6 is provided with a third thread groove 34 threadedly connected to the butt joint 33. The upper end of the input pipe 6 is connected to the valve cavity 2 through a connecting ring 8. The sealing ring 9 is made of elastic rubber material.

[0034] In this embodiment, the connecting ring 8 is fixedly connected to the input pipe 6 through the first thread groove 7. At this time, the multiple groups of control rods 28 on the top of the connecting ring 8 can be rotated to assist the rotation of the connecting ring 8, and then one end of the input pipe 6 is threadedly connected and fixed to the docking pipe 33 through the third thread groove 34 to complete the installation. Similarly, when the connecting ring 8 or the sealing ring 9 needs to be replaced, the input pipe 6 and the connecting ring 8 can be replaced by rotating them in the opposite direction. The operation is convenient and efficient.

[0035] When the mounting block 4 drives the valve disc 5 to be plugged and sealed inside the connecting ring 8, the bottom of the mounting block 4 will gradually come into contact with the top of the control rod 28, pushing the control rod 28 to slide in the guide groove 30, compressing the second spring 31 while compressing the hydraulic oil in the guide groove 30 and the annular groove 29. The hydraulic pressure in the annular groove 29 increases, pushing the middle part of the sealing ring 9 to bulge outward, so as to come into contact with the outer wall of the valve disc 5 during the docking process, reducing the gap between the valve disc 5 and the inner wall of the connecting ring 8 and improving the sealing performance. Conversely, when it is necessary to open the valve, the mounting block 4 drives the valve disc 5 to move upward, gradually releasing the pressure on the top of the control rod 28, the second spring 31 rebounds, the control rod 28 slides in the opposite direction, the pressure in the annular groove 29 decreases, and the sealing ring 9 rebounds and resets.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scour-resistant valve body structure, characterized in that: include: A valve body (1), wherein a valve cavity (2) is formed in the valve body (1), and a knob (3) is provided on the valve body (1); Also includes: An opening and closing mechanism, the opening and closing mechanism comprising a mounting block (4) mounted in the valve cavity (2), the outer wall of the mounting block (4) being evenly and fixedly connected with a plurality of valve flaps (5), the valve body (1) being connected with an input pipe (6), the input pipe (6) being provided with a first thread groove (7), the first thread groove (7) being internally threadedly connected with a connecting ring (8), the valve flap (5) being able to be plugged into the inner wall of the connecting ring (8) in a vertical direction, and being used for controlling the mounting block (4) to drive the valve flap (5) to rise and fall when the knob (3) is turned, thereby controlling the connection state between the connecting ring (8) and the valve cavity (2); a switching mechanism, the switching mechanism being installed in the valve cavity (2) and being used for linking the mounting block (4) to rotate a set angle when the mounting block (4) moves to a set position, thereby switching the position of the valve flap (5) corresponding to the connecting ring (8), reducing the degree of wear of the single valve flap (5), and extending the service life of the valve body as a whole; A sealing mechanism, the sealing mechanism comprising a sealing ring (9) installed in the connecting ring (8), and used to control the sealing ring (9) to contact the outer wall of the valve disc (5) when the valve disc (5) and the connecting ring (8) are connected, thereby reducing the gap between the valve disc (5) and the connecting ring (8) and improving the sealing performance.

2. The erosion-resistant valve body structure according to claim 1, characterized in that: The switching mechanism comprises a driving shaft (10) fixedly mounted on the mounting block (4), both ends of the driving shaft (10) being coaxially fixedly connected to a driving gear (11), and a switching member (12) is provided in the valve body (1) for driving the driving gear (11) to rotate a set angle when the driving gear (11) reaches a set position, thereby completing the position switching of the valve flap (5).

3. The erosion-resistant valve body structure according to claim 2, characterized in that: The switching member (12) comprises two groups of fixed frames (13) fixedly mounted inside the valve body (1), the two groups of fixed frames (13) being symmetrically distributed on both sides of the mounting block (4), a bevel gear block (14) being slidably connected in the horizontal direction inside the fixed frame (13), a first spring (15) fixedly connected to the fixed frame (13) being fixedly connected to one side of the bevel gear block (14), and a limit member (16) for limiting the rotation angle of the valve flap (5) each time being provided in the valve cavity (2).

4. The erosion-resistant valve body structure according to claim 3, characterized in that: The opening and closing mechanism further comprises a lifting frame (17) rotatably connected to both ends of the driving shaft (10); a lifting groove (18) is provided in the valve body (1); the lifting frame (17) is slidably connected to the inner wall of the lifting groove (18); a driving tube (19) is rotatably connected to the upper side of the lifting frame (17); and a driving member (20) is provided on the valve body (1) for controlling the lifting frame (17) to be raised and lowered when the knob (3) is rotated.

5. The erosion-resistant valve body structure according to claim 4, characterized in that: The limiting member (16) comprises a fixing ring (21) fixedly mounted on both sides of the lifting frame (17); a plurality of groups of elastic metal sheets (22) are evenly arranged on the inner wall of the fixing ring (21); both ends of the elastic metal sheet (22) are fixedly connected to the inner wall of the fixing ring (21); and the side surface of the elastic metal sheet (22) is slidably fitted to the outer wall of the driving gear (11).

6. The erosion-resistant valve body structure according to claim 4, characterized in that: The driving member (20) comprises a fixed tube (23) fixedly mounted on the valve body (1); the driving tube (19) is movably sleeved with the inner wall of the fixed tube (23); the outer wall of the driving tube (19) is provided with a second thread groove (24) threadedly connected to the inner wall of the fixed tube (23); the bottom of the knob (3) is coaxially fixedly connected to a sealing block (25) rotatably connected to the top of the fixed tube (23); the bottom of the sealing block (25) is coaxially fixedly connected to a driving rod (26); a driving groove (27) is provided in the driving tube (19); the driving rod (26) is slidably connected to the inner wall of the driving groove (27) in a vertical direction.

7. The erosion-resistant valve body structure according to claim 1, characterized in that: The sealing mechanism further comprises a plurality of control rods (28) mounted on the connecting ring (8), the connecting ring (8) being provided with an annular groove (29), the upper and lower sides of the sealing ring (9) being respectively fixedly connected to the inner wall of the annular groove (29), the connecting ring (8) being provided with a plurality of guide grooves (30) connected to the annular groove (29), the control rods (28) being slidably connected to the inner wall of the guide groove (30) in a vertical direction, the annular groove (29) being used to store hydraulic oil, the bottom of the control rods (28) being fixedly connected to a second spring (31) fixedly connected to the guide groove (30), and the input pipe (6) being provided with a connecting piece (32) for improving the replacement efficiency of the sealing ring (9).

8. The erosion-resistant valve body structure according to claim 7, characterized in that: The connecting member (32) comprises a butt joint pipe (33) fixedly mounted on the valve body (1); the outer wall of the input pipe (6) is provided with a third thread groove (34) threadedly connected to the butt joint pipe (33); the upper end of the input pipe (6) is connected to the valve chamber (2) via the connecting ring (8).

9. The erosion-resistant valve body structure according to claim 1, characterized in that: An output pipe (35) is fixedly connected to the side surface of the valve body (1), and one end of the output pipe (35) is in communication with the valve cavity (2).

10. The erosion-resistant valve body structure according to claim 1, characterized in that: The sealing ring (9) is made of elastic rubber material.

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