Anti-locking slip increasing structure for lower end part of valve rod

Abstract

The utility model relates to the field of valve maintenance, and discloses a valve rod lower end anti-locking slip increasing structure which comprises a transmission sleeve used for supporting, the top end of the transmission sleeve is fixedly connected with a supporting sleeve, the interior of the supporting sleeve is connected with a rotating column in a sliding mode, and the exterior of the rotating column is fixedly connected with an adjusting handle. A blocking valve is rotationally connected to the interior of the transmission sleeve, a mounting threaded column is fixedly connected to the bottom end of the rotating column, the bottom end of the mounting threaded column is connected with the interior of the blocking valve through a traction rod so as to achieve rotary opening and closing of the blocking valve, and a mounting groove is formed in the supporting sleeve. A fixing sleeve is fixedly connected to the interior of the mounting groove, and the exterior of the mounting threaded column is in threaded connection with the interior of the fixing sleeve. According to the utility model, the friction force outside the valve rod is reduced, the rotation smoothness of the valve rod is improved, the valve rod is prevented from being stuck due to long-term use, and the use stability is improved.

Description

Technical Field

[0001] The utility model relates to the field of valve maintenance, in particular to a slip-increasing structure for preventing the lower end of a valve stem from getting stuck. Background Art

[0002] The valve stem is a key component in the valve. It controls the flow of fluid by rotating or moving. The valve stem is usually connected to the valve drive and valve disc, and is responsible for transmitting the action of the drive to the valve disc, thereby realizing the switching or regulating function of the valve.

[0003] After long-term use of the valve stem, the external friction coefficient of the valve stem increases due to the squeezing of the water flow and the rust on the outside of the valve stem. Problems such as sticking and biting may occur between the valve stem and the valve body. It is extremely difficult to rotate and open the valve stem, making normal use extremely difficult. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a slip-increasing structure for preventing the valve stem from getting stuck at the lower end thereof, so as to avoid the valve stem from getting stuck due to long-term use.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] The anti-stuck slip structure at the lower end of the valve stem includes a transmission sleeve for support, the top of the transmission sleeve is fixedly connected to a support sleeve, the interior of the support sleeve is slidably connected to a rotating column, the outside of the rotating column is fixedly connected to an adjusting handle, the interior of the transmission sleeve is rotatably connected to a blocking valve, the bottom end of the rotating column is fixedly connected to a mounting threaded column, the bottom end of the mounting threaded column is connected to the interior of the blocking valve through a traction rod to realize the rotational opening and closing of the blocking valve, the interior of the support sleeve is provided with a mounting groove, the interior of the mounting groove is fixedly connected to a fixing sleeve, the external thread of the mounting threaded column is connected to the interior of the fixing sleeve, the interior of the rotating column is connected to the mounting threaded column through a drainage groove to realize lubrication of the outside of the mounting threaded column, the outside of the rotating column is fixedly connected to a support ring, and the support ring is connected to the interior of the fixing sleeve through a sealing ring.

[0007] Furthermore, the sealing ring includes a sealing sleeve located at the bottom end of the support ring, a sealing notch is opened on the outer side of the top end of the fixing sleeve, the bottom end of the sealing sleeve is fixedly connected to an upper sealing gasket, and the outside of the sealing sleeve is nested in the inside of the sealing notch.

[0008] Furthermore, the traction rod includes a connecting column located at the bottom end of the mounting threaded column, and limiting slots are provided on both sides of the interior of the blocking valve. Both sides of the connecting column are fixedly connected to limiting plates, and the outside of the limiting plate is slidably connected to the inside of the limiting slot, and the outside of the connecting column is slidably connected to the inside of the blocking valve.

[0009] Furthermore, the drainage groove includes a transmission groove located inside the rotating column, discharge grooves are provided on both sides of the bottom end of the transmission groove, an entry slot is provided in the middle of the adjustment handle, the entry slot is connected to the transmission groove, and a lubrication ring groove is provided on the outside of the mounting threaded column at the horizontal position of the discharge port.

[0010] Furthermore, the outer portion of the support ring is fitted onto the inner wall of the mounting groove to achieve stability in the movement of the rotating column.

[0011] Furthermore, sealing half rings are fixedly connected to both sides of the interior of the transmission sleeve, and the inner sides of the sealing half rings are respectively fitted on both sides of the blocking valve.

[0012] Furthermore, the inner bottom end of the sealing notch is fixedly connected to a lower sealing gasket, and the bottom end of the upper sealing gasket is attached to the top end of the lower sealing gasket.

[0013] The utility model has the following beneficial effects:

[0014] In the utility model, lubricating oil is added into the inside of the inlet groove and enters the inside of the transmission groove, and then discharged to both sides through the discharge groove and discharged through the discharge port. Due to the restriction of the fixing sleeve, it enters the inside of the lubricating ring groove, thereby lubricating the outside of the installation thread column, reducing the friction force on the outside of the valve stem, improving the smoothness of the valve stem rotation, avoiding the valve stem from getting stuck due to long-term use, and improving the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall diagram of the anti-stuck slip-increasing structure at the lower end of the valve stem proposed in the present invention;

[0016] Figure 2 This is an internal diagram of the anti-stuck slip-increasing structure at the lower end of the valve stem proposed in the present invention;

[0017] Figure 3 This is a diagram of the rotating column mechanism of the anti-stuck slip-increasing structure of the valve stem lower end proposed by the present invention;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is an internal diagram of the fixed sleeve of the anti-stuck slip-enhancing structure of the lower end of the valve stem proposed in the present invention;

[0020] Figure 6 This is a diagram of the interior of the rotating column of the anti-stuck slip-increasing structure of the valve stem lower end proposed by the present invention;

[0021] Figure 7This is an internal diagram of a blocking valve with a slip-increasing structure for preventing the lower end of the valve stem from getting stuck, as proposed by the present invention.

[0022] Legend:

[0023] 1. Transmission sleeve; 2. Support sleeve; 3. Rotating column; 4. Entry slot; 5. Adjustment handle; 6. Blocking valve; 7. Sealing half ring; 8. Fixing sleeve; 9. Mounting groove; 10. Support ring; 11. Connecting column; 12. Mounting thread column; 13. Discharge port; 14. Lubrication ring groove; 15. Lower side sealing gasket; 16. Upper side sealing gasket; 17. Sealing sleeve; 18. Sealing slot; 19. Transmission slot; 20. Discharge slot; 21. Limiting plate; 22. Limiting slot. DETAILED DESCRIPTION

[0024] 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 embodiments described 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.

[0025] Reference Figure 1-Figure 3 The present invention provides an embodiment of a slip-increasing structure for preventing the lower end of the valve stem from getting stuck, comprising a transmission sleeve 1 for supporting, the top of the transmission sleeve 1 is fixedly connected to a support sleeve 2, the interior of the support sleeve 2 is slidably connected to a rotating column 3, the outside of the rotating column 3 is fixedly connected to an adjusting handle 5, the interior of the transmission sleeve 1 is rotatably connected to a blocking valve 6, the bottom end of the rotating column 3 is fixedly connected to a mounting threaded column 12, the bottom end of the mounting threaded column 12 is connected to the inside of the blocking valve 6 through a traction rod, so as to realize the rotational opening and closing of the blocking valve 6, the interior of the support sleeve 2 is provided with a mounting groove 9, the interior of the mounting groove 9 is fixedly connected to a fixing sleeve 8, the external threaded connection of the mounting threaded column 12 is then fixed to the interior of the fixing sleeve 8, the interior of the rotating column 3 is connected to the mounting threaded column 12 through a drainage groove, so as to realize lubrication of the external part of the mounting threaded column 12, the external part of the rotating column 3 is fixedly connected to a support ring 10, the support ring 10 is connected to the interior of the fixing sleeve 8 through a sealing ring, the traction rod comprises a connecting column 11 at the bottom end of the mounting threaded column 12, Figure 7 , the inner sides of the blocking valve 6 are provided with limiting notches 22, both sides of the connecting column 11 are fixedly connected to the limiting plates 21, the outer side of the limiting plates 21 is slidably connected to the inner side of the limiting notches 22, and the outer side of the connecting column 11 is slidably connected to the inner side of the blocking valve 6, refer to Figure 6The drainage groove includes a transmission groove 19 opened inside the rotating column 3, and discharge grooves 20 are opened on both sides of the bottom end of the transmission groove 19. The middle of the adjustment handle 5 is provided with an entry groove 4, and the entry groove 4 is connected to the transmission groove 19. Figure 4 A lubrication ring groove 14 is provided on the outside of the mounting threaded column 12 at the horizontal position of the discharge port 13. The outside of the support ring 10 is fitted against the inner wall of the mounting groove 9 to achieve the stability of the movement of the rotating column 3. The inner sides of the transmission sleeve 1 are fixedly connected with sealing half rings 7, and the inner sides of the sealing half rings 7 are respectively fitted against the two sides of the blocking valve 6.

[0026] The adjusting handle 5 is rotated, and the rotating column 3 rotates the mounting threaded column 12. The external thread of the mounting threaded column 12 contacts the inner side of the fixing sleeve 8, thereby rotating the mounting threaded column 12 and pulling it upward. The rotation of the mounting threaded column 12 rotates the connecting column 11, and the limit plate 21 outside the connecting column 11 blocks the rotation of the valve 6, thereby opening and closing. The limit plate 21 slides upward inside the limiting groove 22. When the valve stem is stuck after long-term use, lubricating oil is added to the inside of the transmission groove 19 through the inlet groove 4 at the top of the adjusting handle 5. The lubricating oil flows downward due to gravity in the transmission groove 19, flows outward through the discharge groove 20, and is discharged outward through the discharge port 13, and flows into the inside of the lubricating ring groove 14, thereby wrapping the outside of the mounting threaded column 12, reducing the friction on the outside of the valve stem, improving the smoothness of the valve stem rotation, avoiding the valve stem from getting stuck due to long-term use, and improving the stability of use.

[0027] Reference Figure 2 、 Figure 4 and Figure 5 The sealing ring includes a sealing sleeve 17 located at the bottom end of the support ring 10, a sealing groove 18 is opened on the outer side of the top of the fixing sleeve 8, the bottom end of the sealing sleeve 17 is fixedly connected to the upper sealing gasket 16, the outside of the sealing sleeve 17 is nested in the inside of the sealing groove 18, the bottom end of the inside of the sealing groove 18 is fixedly connected to the lower sealing gasket 15, and the bottom end of the upper sealing gasket 16 is attached to the top of the lower sealing gasket 15.

[0028] The sealing sleeve 17 is inserted into the inside of the sealing groove 18, and the upper sealing gasket 16 at its bottom contacts with the sealing sleeve 17. Because lubrication is mostly added when the valve seat is closed, the sealing sleeve 17 is in contact with the threads inside the fixing sleeve 8 due to the installation thread column 12, generating a downward thrust, thereby squeezing and sealing the lower sealing gasket 15, and adding lubricating oil will not overflow and accumulate inside the installation groove 9.

[0029] Working principle: rotate the adjusting handle 5, the rotating column 3 rotates the mounting threaded column 12, the external thread of the mounting threaded column 12 contacts the inner side of the fixing sleeve 8, thereby rotating the mounting threaded column 12 and pulling it upward, the rotation of the mounting threaded column 12 rotates the connecting column 11, and the limiting plate 21 outside the connecting column 11 blocks the rotation of the valve 6, thereby opening and closing, and the limiting plate 21 slides upward inside the limiting notch 22. When the valve stem is stuck after long-term use, lubricating oil is added to the inside of the transmission groove 19 through the inlet notch 4 on the top of the adjusting handle 5. The lubricating oil is in the transmission groove 19. The inside of the groove 19 flows downward due to gravity, flows outward through the discharge groove 20, and is discharged outward through the discharge port 13, and flows into the inside of the lubrication ring groove 14, thereby wrapping the outside of the mounting threaded column 12. The sealing sleeve 17 is inserted into the inside of the sealing groove 18, and the upper sealing gasket 16 at its bottom contacts the sealing sleeve 17 with each other. Because the valve seat is mostly closed when lubrication is added, the sealing sleeve 17 contacts the threads on the inner side of the fixing sleeve 8 due to the mounting threaded column 12, generating a downward thrust, thereby squeezing and sealing the lower sealing gasket 15, and adding lubricating oil will not overflow and accumulate inside the mounting groove 9.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. The anti-stuck slip-increasing structure at the lower end of the valve stem is characterized by: The invention comprises a transmission sleeve (1) for supporting, wherein the top end of the transmission sleeve (1) is fixedly connected to the support sleeve (2), the interior of the support sleeve (2) is slidably connected to a rotating column (3), the exterior of the rotating column (3) is fixedly connected to an adjusting handle (5), the interior of the transmission sleeve (1) is rotatably connected to a blocking valve (6), the bottom end of the rotating column (3) is fixedly connected to a mounting threaded column (12), and the bottom end of the mounting threaded column (12) is connected to the interior of the blocking valve (6) via a traction rod, so as to realize the blocking valve ( 6), the support sleeve (2) is provided with a mounting groove (9) inside, the mounting groove (9) is fixedly connected to the fixing sleeve (8), the external thread of the mounting thread column (12) is connected to the inside of the fixing sleeve (8), the interior of the rotating column (3) is connected to the mounting thread column (12) through a drainage groove to achieve lubrication of the outside of the mounting thread column (12), the exterior of the rotating column (3) is fixedly connected to a support ring (10), and the support ring (10) is connected to the inside of the fixing sleeve (8) through a sealing ring.

2. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 1, characterized in that: The sealing ring comprises a sealing sleeve (17) located at the bottom end of the support ring (10), a sealing notch (18) is provided on the outer side of the top end of the fixing sleeve (8), the bottom end of the sealing sleeve (17) is fixedly connected to the upper sealing gasket (16), and the outer portion of the sealing sleeve (17) is nested in the inner portion of the sealing notch (18).

3. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 1, characterized in that: The traction rod includes a connecting column (11) located at the bottom end of the mounting threaded column (12), and limiting notches (22) are provided on both sides of the interior of the blocking valve (6). Both sides of the connecting column (11) are fixedly connected to the limiting plates (21), and the outer portion of the limiting plates (21) is slidably connected to the interior of the limiting notches (22), and the outer portion of the connecting column (11) is slidably connected to the interior of the blocking valve (6).

4. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 1, characterized in that: The drainage groove includes a transmission groove (19) located inside the rotating column (3), and discharge grooves (20) are provided on both sides of the bottom end of the transmission groove (19). An entry groove (4) is provided in the middle of the adjustment handle (5), and the entry groove (4) and the transmission groove (19) are connected. A lubrication ring groove (14) is provided on the outside of the mounting threaded column (12) at a horizontal position of the discharge port (13).

5. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 1, characterized in that: The outer portion of the support ring (10) is fitted onto the inner wall of the mounting groove (9) to achieve stability in the movement of the rotating column (3).

6. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 1, characterized in that: Sealing half rings (7) are fixedly connected to both sides of the interior of the transmission sleeve (1), and the inner sides of the sealing half rings (7) are respectively fitted on both sides of the blocking valve (6).

7. The anti-stuck slip-increasing structure at the lower end of the valve stem according to claim 2, characterized in that: The inner bottom end of the sealing notch (18) is fixedly connected to the lower sealing gasket (15), and the bottom end of the upper sealing gasket (16) is attached to the top end of the lower sealing gasket (15).

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