An erosion-resistant valve body structure

Abstract

The present invention discloses a scour-resistant valve body structure, which relates to the field of valve bodies and solves the problem that the existing scour-resistant valve body structure only has one group of valve flaps for continuous use inside, which causes the valve flaps to wear easily and has a short service life. The structure comprises a valve body, an opening and closing mechanism, a switching mechanism and a sealing mechanism. A knob is provided on the valve body. The opening and closing mechanism comprises a mounting block, a valve flap, an input pipe and a connecting ring. The sealing mechanism comprises a sealing ring. 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, and the connection state between the connecting ring and the valve cavity is controlled. When the mounting block moves to a set position, the switching mechanism links the mounting block to rotate a set angle, switches the position of the valve flap corresponding to the connecting ring, and prolongs the service life of the valve body. When the valve flap is docked with the connecting ring, the sealing mechanism controls the sealing ring 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.

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 object, the present invention provides the following technical solutions: A scouring-resistant valve body structure, including a valve body main body, an opening and closing mechanism, a switching mechanism and a sealing mechanism. A valve cavity is provided in the valve body main body, and a knob is provided on the valve body main body. The opening and closing mechanism includes a mounting block installed in the valve cavity. Multiple valve flaps are uniformly and fixedly connected to the outer wall of the mounting block. An input pipe is connected to the valve body main body, and a first thread groove is provided in the input pipe. A connecting ring is threadedly connected in the first thread groove. The valve flap can be inserted into the inner wall of the connecting ring in the vertical direction, so as to drive the valve flap to lift by driving the mounting block when the knob is rotated, and control the communication state between the connecting ring and the valve cavity. The switching mechanism is installed in the valve cavity and is used to drive the mounting block to rotate a set angle when the mounting block moves to a set position, so as to switch the position of the valve flap corresponding to the connecting ring, reduce the wear degree of a single valve flap, and extend the overall service life of the valve body. The sealing mechanism includes a sealing ring installed in the connecting ring, which is used to control the sealing ring to abut against 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 installed on the mounting block. Driving gears are coaxially and fixedly connected to both ends of the driving shaft. A switching member is provided in the valve body main body to drive the driving gear to rotate a set angle when the driving gear reaches a set position, so as to complete the switching of the valve flap position, which is convenient for driving the mounting block to rotate a set angle when the mounting block moves to a set position, switching the position of the valve flap corresponding to the connecting ring, reducing the wear degree of a single valve flap, and extending the overall service life of the valve body.

[0007] Preferably, the switching member includes two fixed frames fixedly installed inside the valve body main body. The two fixed frames are symmetrically distributed on both sides of the mounting block. A helical tooth block is slidably connected in the fixed frame along the horizontal direction. A first spring fixedly connected to the fixed frame is fixedly connected to one side of the helical tooth block. A limiting member is provided in the valve cavity to limit the rotation angle of the valve flap each time, which is convenient for driving the driving gear to rotate a set angle when the driving gear reaches a set position, so as to complete the switching of the valve flap position.

[0008] Preferably, the opening and closing mechanism further includes a lifting frame rotatably connected to both ends of the drive shaft. A lifting groove is formed in the valve body. The lifting frame is slidably connected to the inner wall of the lifting groove. A drive pipe is rotatably connected to the upper side of the lifting frame. The valve body is provided with a driving member for controlling the lifting of the lifting frame when the knob rotates, facilitating the control of the installation block to drive the valve flap to lift when the knob rotates, and controlling the communication state between the connecting ring and the valve cavity.

[0009] Preferably, the limiting member includes fixing rings fixedly installed on both sides of the lifting frame. A plurality of groups of elastic metal sheets are evenly arranged on the inner wall of the fixing ring. Both ends of the elastic metal sheet are fixedly connected to the inner wall of the fixing ring. The side surface of the elastic metal sheet is slidably attached to the outer wall of the driving gear, facilitating the limitation of the rotation angle of the valve flap each time.

[0010] Preferably, the driving member includes a fixing pipe fixedly installed on the valve body. The driving pipe is movably sleeved in the inner wall of the fixing pipe. A second thread groove is formed on the outer wall of the driving pipe and is threadedly connected to the inner wall of the fixing pipe. The bottom of the knob is coaxially and fixedly connected to a sealing block rotatably connected to the top end of the fixing pipe. The bottom of the sealing block is coaxially and fixedly connected to a driving rod. A driving groove is formed in the driving pipe. The driving rod is slidably connected to the inner wall of the driving groove in the vertical direction, facilitating the control of the lifting of the lifting frame when the knob rotates.

[0011] Preferably, the sealing mechanism further includes a plurality of control rods installed on the connecting ring. An annular groove is formed on the connecting ring. The upper and lower sides of the sealing ring are respectively fixedly connected to the inner wall of the annular groove. A plurality of guiding grooves communicating with the annular groove are formed in the connecting ring. The control rod is slidably connected to the inner wall of the guiding groove in the vertical direction. The annular groove is used for storing hydraulic oil. The bottom of the control rod is fixedly connected to a second spring fixedly connected to the guiding groove. The input pipe is provided with a connecting member for improving the replacement efficiency of the sealing ring, facilitating the control of the sealing ring to abut against the outer wall of the valve flap when the valve flap is docked with the connecting ring, reducing the gap between the valve flap and the connecting ring, and improving the sealing performance.

[0012] Preferably, the connecting member includes a docking pipe fixedly installed on the valve body. A third thread groove threadedly connected to the docking pipe is formed on the outer wall of the input pipe. The upper end of the input pipe communicates with the valve cavity through the connecting ring, facilitating the improvement of the replacement efficiency of the sealing ring.

[0013] Preferably, an output pipe is fixedly connected to the side surface of the valve body. One end of the output pipe communicates with the valve cavity, facilitating the transportation and control of fluids.

[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:

[0016] 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

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a partial structural schematic diagram of the opening and closing mechanism of the present invention;

[0019] Figure 3 for Figure 2 A magnified image of area A;

[0020] Figure 4 It is a schematic diagram of the local structure of the switching mechanism of the present invention;

[0021] Figure 5 for Figure 4 Enlarged view of area B;

[0022] Figure 6 It is a schematic diagram of the partial structure of the sealing mechanism of the present invention;

[0023] Figure 7 for Figure 6 Enlarged view of area C in the middle;

[0024] Figure 8 for Figure 6 Enlarged view of area D in the middle.

[0025] In the figure: 1. Valve body main body; 2. Valve cavity; 3. Knob; 4. Mounting block; 5. Valve flap; 6. Input pipe; 7. First thread groove; 8. Connecting ring; 9. Sealing ring; 10. Driving shaft; 11. Driving gear; 12. Switching member; 13. Fixed frame; 14. Helical tooth block; 15. First spring; 16. Limiting member; 17. Lifting frame; 18. Lifting groove; 19. Driving pipe; 20. Driving member; 21. Fixed ring; 22. Elastic metal sheet; 23. Fixed 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. Docking pipe; 34. Third thread groove; 35. Output pipe. Detailed implementation manner

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Please refer to Figures 1-8 , a kind of erosion-resistant valve body structure shown in the figure, including a valve body main body 1, an opening and closing mechanism, a switching mechanism and a sealing mechanism. A valve cavity 2 is opened in the valve body main body 1. A knob 3 is provided on the valve body main body 1. An output pipe 35 is fixedly connected to the side of the valve body main 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. Multiple groups of valve flaps 5 are uniformly and fixedly connected to the outer wall of the mounting block 4. An input pipe 6 is connected to the valve body main 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 inserted into the inner wall of the connecting ring 8 along the vertical direction, so as to control the mounting block 4 to drive the valve flap 5 to lift when the knob 3 is rotated, and control the communication state between the connecting ring 8 and the valve cavity 2.

[0029] The switching mechanism is installed in the valve cavity 2 and is used to drive the mounting block 4 to rotate a set angle when the mounting block 4 moves to a set position, switch the position of the valve flap 5 corresponding to the connecting ring 8, reduce the wear degree of a single valve flap 5, and extend the overall service life of the valve body. The sealing mechanism includes a sealing ring 9 installed in the connecting ring 8, which is used to control the sealing ring 9 to abut against the outer wall of the valve flap 5 when the valve flap 5 is docked with the connecting ring 8, reduce the gap between the valve flap 5 and the connecting ring 8, and improve the sealing performance.

[0030] The switching mechanism includes a drive shaft 10 fixedly installed on the mounting block 4. At both ends of the drive shaft 10, drive gears 11 are coaxially and fixedly connected. Inside the valve body 1, there is a switching member 12 for driving the drive gear 11 to rotate a set angle when the drive gear 11 reaches the set position, thereby completing the position switching of the valve flap 5.

[0031] The opening and closing mechanism further includes a lifting frame 17 rotatably connected to both ends of the drive shaft 10. A lifting groove 18 is formed inside the valve body 1. The lifting frame 17 is slidably connected to the inner wall of the lifting groove 18. A drive pipe 19 is rotatably connected to the upper side of the lifting frame 17. On the valve body 1, there is a driving member 20 for controlling the lifting of the lifting frame 17 when the knob 3 rotates.

[0032] The driving member 20 includes a fixed pipe 23 fixedly installed on the valve body 1. The drive pipe 19 is movably sleeved on the inner wall of the fixed pipe 23. A second thread groove 24 for threaded connection with the inner wall of the fixed pipe 23 is formed on the outer wall of the drive pipe 19. At the bottom of the knob 3, a sealing block 25 rotatably connected to the top end of the fixed pipe 23 is coaxially and fixedly connected. At the bottom of the sealing block 25, a drive rod 26 is coaxially and fixedly connected. A drive groove 27 is formed inside the drive pipe 19. The drive rod 26 is slidably connected to the inner wall of the drive groove 27 in the vertical direction.

[0033] In this embodiment, by rotating the knob 3, the sealing block 25 and the drive rod 26 are driven to rotate. The drive rod 26 drives the outer drive pipe 19 to rotate. Under the guiding action of the first thread groove 7, while the drive pipe 19 rotates inside the fixed pipe 23, lifting adjustment is completed. The drive pipe 19 drives the lifting frame 17 to lift, so that the drive shaft 10 and the mounting block 4 can be lifted together, thereby driving the valve flap 5 to lift, and adjusting the insertion state between the valve flap 5 and the bottom connection ring 8. When the valve flap 5 is inserted into the connection ring 8, the communication state between the input pipe 6 and the valve chamber 2 can be blocked, and the fluid in the input pipe 6 cannot flow into the output pipe 35 through the valve chamber 2. When the valve flap 5 is disengaged from the insertion state with the connection ring 8, the fluid in the input pipe 6 can enter the valve chamber 2 through the gap between the valve flap 5 and the connection ring 8, and then be output through the output pipe 35. The flow rate is determined by the size of the gap between the valve flap 5 and the connection ring 8, and the size of the gap is controlled by rotating the knob 3 to make the lifting frame 17 drive the mounting block 4 to move.

[0034] It should be noted that when the installation block 4 moves to the set position, the driving gear 11 is driven to rotate by the switching member 12, so as to control the driving shaft 10 to drive the installation block 4 to rotate by a set angle, and then 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, reducing the wear degree of a single valve flap 5 and extending the overall service life of the valve body. When the valve flap 5 is docked with the connecting ring 8, the sealing mechanism controls the sealing ring 9 to abut against the outer wall of the valve flap 5, reducing the gap between the valve flap 5 and the connecting ring 8 and improving the overall sealing performance.

[0035] Embodiment 2

[0036] Please refer to Figures 2-8 , this embodiment further describes Embodiment 1. The switching member 12 in the figure includes two fixed frames 13 fixedly installed inside the valve body main body 1. The two fixed frames 13 are symmetrically distributed on both sides of the installation block 4. A helical gear block 14 is slidably connected horizontally inside the fixed frame 13. One side of the helical gear block 14 is fixedly connected to a first spring 15 fixedly connected to the fixed frame 13. A limiting member 16 for limiting the rotation angle of the valve flap 5 each time is provided in the valve cavity 2. The limiting member 16 includes fixed rings 21 fixedly installed 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 fixed ring 21. Both ends of the elastic metal sheet 22 are fixedly connected to the inner wall of the fixed ring 21. The side surface of the elastic metal sheet 22 is in sliding fit with the outer wall of the driving gear 11.

[0037] In this implementation scheme, the number of teeth of the driving gear 11 is the same as the number of valve flaps 5 and the positions correspond to each other. The number of elastic metal sheets 22 is the same as the number of valve flaps 5 and they are evenly distributed on the inner wall of the fixed ring 21 to limit the driving gear 11 to a certain extent. When the lifting frame 17 drives the installation block 4 and the valve flap 5 to move upward, at this time, the driving gear 11 abuts against 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 does not rotate. When the lifting frame 17 drives the valve flap 5 to move downward, the outer wall of the driving gear 11 abuts against the top plane of the helical gear block 14, and then the driving gear 11 can be pushed to rotate by a 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 two adjacent elastic metal sheets 22 and is clamped and fixed. After that, the driving gear 11 rotates to the lower part of the helical gear block 14 and the driving shaft 10 stops rotating, and the adjustment of the position of the valve flap 5 can be completed. During the process of the valve flap 5 being docked and sealed with the connecting ring 8, the valve flap 5 remains relatively stable and is inserted and sealed with the connecting ring 8.

[0038] Since the position of the helical block 14 is relatively fixed, therefore, only when the valve flap 5 opens a large flow rate, at this time the whole driving gear 11 moves to the upper side of the helical block 14, and then during the process of closing the valve, the helical block 14 can drive the driving gear 11 to rotate to switch the position of the valve flap 5. When the distance between the valve flap 5 and the connecting ring 8 is short, then when closing the valve, the position of the valve flap 5 will not be switched. In this way, the switching frequency of the valve flap 5 is effectively reduced, avoiding damage to internal components caused by frequent switching, effectively extending the overall service life of the valve body, and reducing the replacement frequency.

[0039] Embodiment III

[0040] Please refer to Figures 4-8 , this embodiment further illustrates Embodiment I. The sealing mechanism in the figure further includes a plurality of control rods 28 installed on the connecting ring 8. An annular groove 29 is formed on the connecting ring 8. Both the upper and lower sides of the sealing ring 9 are fixedly connected to the inner wall of the annular groove 29 respectively. A plurality of guiding grooves 30 communicating with the annular groove 29 are formed in the connecting ring 8. The control rods 28 are slidably connected to the inner wall of the guiding grooves 30 in the vertical direction. The annular groove 29 is used to store hydraulic oil. A second spring 31 fixedly connected to the guiding grooves 30 is fixedly connected to the bottom of the control rod 28. A connecting member 32 for improving the replacement efficiency of the sealing ring 9 is provided on the input pipe 6.

[0041] The connecting member 32 includes a butt joint pipe 33 fixedly installed on the valve body 1. A third thread groove 34 for threaded connection with the butt joint pipe 33 is formed on the outer wall of the input pipe 6. The upper end of the input pipe 6 communicates with the valve cavity 2 through the connecting ring 8. The sealing ring 9 is made of elastic rubber material.

[0042] In this implementation scheme, the connecting ring 8 and the input pipe 6 are fixedly connected through the first thread groove 7. At this time, the plurality of control rods 28 at the top of the connecting ring 8 can be rotated to assist in the rotation of the connecting ring 8. Then, one end of the input pipe 6 and the butt joint pipe 33 are fixedly connected through the third thread groove 34 to complete the installation. Similarly, when it is necessary to replace the connecting ring 8 or the sealing ring 9, the input pipe 6 and the connecting ring 8 can be removed by reverse rotation for replacement, and the operation is convenient and efficient.

[0043] When the installation block 4 drives the valve flap 5 to be inserted and sealed into the connecting ring 8, the bottom of the installation block 4 will gradually contact the top of the control rod 28, pushing the control rod 28 to slide in the guide groove 30. While compressing the second spring 31, the hydraulic oil in the guide groove 30 and the annular groove 29 is compressed. The hydraulic pressure in the annular groove 29 increases, pushing the middle part of the sealing ring 9 to protrude outwards, so as to contact the outer wall of the valve flap 5 during docking, reducing the gap between the valve flap 5 and the inner wall of the connecting ring 8 and improving the sealing performance. On the contrary, when the valve needs to be opened, the installation block 4 drives the valve flap 5 to move upwards, gradually releasing the pressure on the top of the control rod 28. The second spring 31 rebounds, the control rod 28 slides in the reverse direction, the pressure in the annular groove 29 decreases, and the sealing ring 9 rebounds and resets.

[0044] It should be noted that in this article, relational terms such as first and second are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. 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, wherein the sealing mechanism comprises a sealing ring (9) installed in the connecting ring (8), and is 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. The switching mechanism comprises a driving shaft (10) fixedly installed 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 driving gear (11) for driving the driving gear (11) to rotate a set angle when the driving gear (11) reaches a set position, so as to complete the position of the valve disc (5). A switching member (12) for switching, the switching member (12) comprising 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 beveled tooth 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 beveled tooth block (14), a limit member (16) for limiting the rotation angle of the valve flap (5) each time being provided in the valve cavity (2), the opening and closing mechanism further comprising a lifting frame (17) rotatably connected to both ends of the drive shaft (10), and a lifting slot (18) being provided in the valve body (1). The lifting frame (17) is slidably connected to the inner wall of the lifting groove (18); the upper side of the lifting frame (17) is rotatably connected to a driving tube (19); the valve body (1) is provided with a driving member (20) for controlling the lifting frame (17) to move up and down when the knob (3) is rotated; the limiting member (16) comprises a fixing ring (21) fixedly mounted on both sides of the lifting frame (17); the inner wall of the fixing ring (21) is evenly provided with a plurality of groups of elastic metal sheets (22); both ends of the elastic metal sheets (22) are fixedly connected to the inner wall of the fixing ring (21); the side surface of the elastic metal sheet (22) is slidably fitted with the outer wall of the driving gear (11); the sealing mechanism also includes The invention comprises a plurality of control rods (28) mounted on the connecting ring (8), the connecting ring (8) is provided with an annular groove (29), the upper and lower sides of the sealing ring (9) are respectively fixedly connected to the inner wall of the annular groove (29), the connecting ring (8) is provided with a plurality of guide grooves (30) connected to the annular groove (29), the control rods (28) are 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 rods (28) is fixedly connected to a second spring (31) fixedly connected to the guide groove (30), and the input pipe (6) is provided with a connecting piece (32) for improving the replacement efficiency of the sealing ring (9); 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.

2. The erosion-resistant valve body structure according to claim 1, 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).

3. 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).

4. 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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