Limiting mechanism and gate valve
By designing a limiting mechanism including multiple knobs, rotating shafts and limiting rings, the problem that the existing gate valve limiting mechanism cannot effectively prevent non-workers from operating the valves, and the effective limiting and high safety of the gate valves are achieved.
Patent Information
- Application Number
- CN202421663260.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The existing gate valve position limiting mechanism cannot effectively prevent non-workers from operating the valve, which poses safety hazards.
A limiting mechanism is designed, including a valve body shell, a valve plate, a driving assembly and a limiting mechanism mounting housing. The rotating shaft and limiting ring are driven by multiple knobs until the notch on the limiting ring rotates to the topmost position, allowing the limiting block to pass through the notch, ensuring the smooth rotation of the turntable and threaded rod, thereby achieving limiting work on the gate valve.
Through the above-mentioned configuration, non-workers can effectively prevent operating the valve, improve safety, and ensure that the valve is only adjusted by authorized personnel.
Smart Images
Figure CN222746721U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, in particular to a limiting mechanism and a gate valve. Background Art
[0002] The gate valve is a gate that opens and closes. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened or fully closed, and cannot be adjusted or throttled. The gate valve is sealed by the contact between the valve seat and the gate. Usually, the sealing surface is welded with metal materials to increase wear resistance.
[0003] A Chinese patent with announcement number CN212080208U discloses a gate valve with a limited position mechanism, including a bracket, a valve stem and a handwheel, wherein the bracket is connected to the valve stem through a nut arranged at the top, and the gate valve also includes: a locking assembly, the locking assembly includes a buckle and a screw support, one side of the buckle is fixedly connected to the screw support, a screw is passed through the screw support, the screw is fixedly connected to a support, and one side of the screw is rotatably connected to a cam.
[0004] The above-mentioned patent still has the following technical defects: although a limit mechanism is provided to limit the valve to prevent the valve from rotating, any non-staff member can release the limit on the valve and operate the valve. Utility Model Content
[0005] The utility model aims to solve the problems existing in the background technology and propose a limit mechanism and a gate valve.
[0006] On the one hand, the utility model provides a limiting mechanism, comprising:
[0007] A valve body housing is connected to a water inlet connecting pipe and a water outlet connecting pipe;
[0008] The valve plate is arranged inside the valve body shell. A driving assembly for driving the valve plate to rise and fall is installed on the valve body shell. The driving assembly includes a threaded tube, a threaded rod and a handwheel. The threaded tube is connected to the valve plate. The threaded rod is rotatably installed on the valve body shell. The threaded rod is threadedly connected to the threaded tube. The handwheel is installed on the upper end of the threaded rod.
[0009] The limit mechanism is installed in the shell, and the limit mechanism installation shell is installed at the upper end of the valve body shell. The threaded rod movably penetrates the limit mechanism installation shell. A turntable located on the inner side of the limit mechanism installation shell is installed on the threaded rod. The turntable is connected to the limit block. A plurality of rotating shafts are rotatably installed on the limit mechanism installation shell, and a limit ring is installed on the rotating shaft. A notch is opened on the side of the limit ring for the limit block to pass through. One end of the rotating shaft extends to the outside of the limit mechanism installation shell and is installed with a knob.
[0010] Preferably, a plurality of cylinders are installed on the outer circumference of the limiting mechanism mounting shell, a plurality of rotating shafts are movably passed through the plurality of cylinders respectively, an angle scale is installed on the cylinder, and a pointer is installed on the knob.
[0011] Preferably, sealing rings are installed on both sides of the inner wall of the valve body shell.
[0012] Preferably, a filter screen is installed on the inner side of the water inlet connecting pipe.
[0013] Preferably, a sealing gasket is provided at the upper end of the valve plate.
[0014] Preferably, an anti-corrosion layer is provided on the inner walls of the valve body shell, the water inlet connecting pipe and the water outlet connecting pipe, and the anti-corrosion layer is a RLHY-type acid-resistant and alkali-resistant anti-corrosion coating.
[0015] On the other hand, the utility model also provides a gate valve having the above-mentioned limiting mechanism.
[0016] Compared with the prior art, the utility model has the following beneficial technical effects: the multiple knobs are rotated respectively, thereby driving the rotating shaft and the limit ring to rotate, until the multiple notches on the multiple limit rings are rotated to the topmost position, at which time the limit block can pass through the notch, thereby ensuring the smooth rotation of the turntable and the threaded rod. If one of the notches is not in the upper position, the rotation of the turntable is limited, thereby making it impossible to adjust the valve state; through the setting of the above-mentioned structure, the limiting work of the gate valve can be realized, preventing non-staff from operating the valve, and the safety is relatively high. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model.
[0018] Figure 2 It is a cross-sectional structural diagram of the valve body shell in the utility model.
[0019] Figure 3 It is a structural schematic diagram of the inner side of the housing in which the limiting mechanism in the utility model is installed.
[0020] Figure 4 for Figure 1 Schematic diagram of the local enlarged structure at A.
[0021] Figure 5 for Figure 2 Schematic diagram of the local enlarged structure at point B.
[0022] 1. Valve body shell; 2. Water inlet connecting pipe; 3. Water outlet connecting pipe; 4. Limiting mechanism mounting shell; 5. Sealing ring; 6. Handwheel; 7. Valve plate; 8. Threaded pipe; 9. Threaded rod; 10. Filter screen; 11. Turntable; 12. Rotating shaft; 13. Limiting ring; 131. Notch; 14. Limiting block; 15. Knob; 16. Cylinder; 17. Pointer; 18. Angle scale; 19. Sealing gasket. DETAILED DESCRIPTION
[0023] Embodiment 1
[0024] like Figure 1 , Figure 2 , Figure 3 as well as Figure 5 As shown, a limiting mechanism proposed in this embodiment includes a valve body shell 1, a valve plate 7, a mounting shell 4 and a limiting mechanism.
[0025] The valve body shell 1 is connected to a water inlet connecting pipe 2 and a water outlet connecting pipe 3. A filter screen 10 is installed on the inner side of the water inlet connecting pipe 2. The filter screen 10 can filter large particles of impurities in the water to prevent impurities from entering the interior of the valve body shell 1 and affecting the closing of the valve plate 7.
[0026] The valve plate 7 is arranged inside the valve body shell 1, and sealing rings 5 are installed on both sides of the inner wall of the valve body shell 1. The sealing rings 5 can prevent water leakage between the water inlet connecting pipe 2 and the water outlet connecting pipe 3; a sealing gasket 19 is arranged on the upper end of the valve plate 7, and the sealing gasket 19 can prevent water from flowing into the inner top of the valve body shell 1, thereby improving the sealing between the valve plate 7 and the inner wall of the valve body shell 1; a driving component for driving the valve plate 7 to rise and fall is installed on the valve body shell 1, and the driving component includes a threaded pipe 8, a threaded rod 9 and a handwheel 6, the threaded pipe 8 is connected to the valve plate 7, the threaded rod 9 is rotatably installed on the valve body shell 1, and the threaded rod 9 is threadedly connected to the threaded pipe 8, and the handwheel 6 is installed on the upper end of the threaded rod 9.
[0027] The limit mechanism mounting shell 4 is installed at the upper end of the valve body shell 1, and the threaded rod 9 movably penetrates the limit mechanism mounting shell 4. A turntable 11 located on the inner side of the limit mechanism mounting shell 4 is installed on the threaded rod 9, and a limit block 14 is connected to the turntable 11. A plurality of rotating shafts 12 are rotatably installed on the limit mechanism mounting shell 4, and a limit ring 13 is installed on the rotating shaft 12. A notch 131 for the limit block 14 to penetrate is opened on the side of the limit ring 13, and one end of the rotating shaft 12 extends to the outer side of the limit mechanism mounting shell 4 and is installed with a knob 15.
[0028] An anti-corrosion layer is provided on the inner walls of the valve body shell 1, the water inlet connecting pipe 2 and the water outlet connecting pipe 3, and the anti-corrosion layer is RLHY-903 type acid-resistant and alkali-resistant anti-corrosion coating.
[0029] In the present technical solution, after the driving assembly is limited, non-staff cannot drive the handwheel 6 to rotate. When the staff needs to adjust the opening and closing state of the valve plate 7, they can rotate the multiple knobs 15 respectively, thereby driving the rotating shaft 12 and the limiting ring 13 to rotate, until the multiple notches 131 on the multiple limiting rings 13 are all rotated to the topmost position, at which time the limit block 14 can pass through the notch 131, which can ensure the smooth rotation of the turntable 11 and the threaded rod 9; through the arrangement of the above-mentioned structure, the limiting work of the gate valve can be realized to prevent non-staff from operating the valve, and the safety is higher; in the open limit state, and when the valve is in the fully open or fully closed state, at this time, the multiple limit blocks 14 are respectively in contact with the corresponding multiple limit rings 13.
[0030] Embodiment 2
[0031] like Figure 1-Figure 4 As shown, a limiting mechanism proposed in this embodiment includes a valve body shell 1, a valve plate 7, a mounting shell 4 and a limiting mechanism.
[0032] The valve body shell 1 is connected to a water inlet connecting pipe 2 and a water outlet connecting pipe 3. A filter screen 10 is installed on the inner side of the water inlet connecting pipe 2. The filter screen 10 can filter large particles of impurities in the water to prevent impurities from entering the interior of the valve body shell 1 and affecting the closing of the valve plate 7.
[0033] The valve plate 7 is arranged inside the valve body shell 1, and sealing rings 5 are installed on both sides of the inner wall of the valve body shell 1. The sealing rings 5 can prevent water leakage between the water inlet connecting pipe 2 and the water outlet connecting pipe 3; a sealing gasket 19 is arranged on the upper end of the valve plate 7, and the sealing gasket 19 can prevent water from flowing into the inner top of the valve body shell 1, thereby improving the sealing between the valve plate 7 and the inner wall of the valve body shell 1; a driving component for driving the valve plate 7 to rise and fall is installed on the valve body shell 1, and the driving component includes a threaded pipe 8, a threaded rod 9 and a handwheel 6, the threaded pipe 8 is connected to the valve plate 7, the threaded rod 9 is rotatably installed on the valve body shell 1, and the threaded rod 9 is threadedly connected to the threaded pipe 8, and the handwheel 6 is installed on the upper end of the threaded rod 9.
[0034] The limit mechanism mounting shell 4 is installed at the upper end of the valve body shell 1, and the threaded rod 9 movably penetrates the limit mechanism mounting shell 4. A turntable 11 located on the inner side of the limit mechanism mounting shell 4 is installed on the threaded rod 9, and a limit block 14 is connected to the turntable 11. A plurality of rotating shafts 12 are rotatably installed on the limit mechanism mounting shell 4, and a limit ring 13 is installed on the rotating shaft 12. A notch 131 for the limit block 14 to penetrate is opened on the side of the limit ring 13, and one end of the rotating shaft 12 extends to the outer side of the limit mechanism mounting shell 4 and is installed with a knob 15.
[0035] An anti-corrosion layer is provided on the inner walls of the valve body shell 1, the water inlet connecting pipe 2 and the water outlet connecting pipe 3, and the anti-corrosion layer is RLHY-903 type acid-resistant and alkali-resistant anti-corrosion coating.
[0036] A plurality of cylinders 16 are installed on the outer circumference of the limiting mechanism mounting shell 4, and a plurality of rotating shafts 12 are respectively movable through the plurality of cylinders 16. An angle scale 18 is installed on the cylinder 16, and a pointer 17 is installed on the knob 15. By setting the pointer 17 and the angle scale 18, the rotation angle of the knob 15 can be conveniently determined.
[0037] A gate valve comprises the limiting mechanism in the above embodiment.
[0038] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A limiting mechanism, characterized in that: include: A valve body housing (1) is provided with a water inlet connecting pipe (2) and a water outlet connecting pipe (3); A valve plate (7), the valve plate (7) is arranged inside the valve body shell (1), a driving assembly for driving the valve plate (7) to rise and fall is installed on the valve body shell (1), the driving assembly comprises a threaded tube (8), a threaded rod (9) and a hand wheel (6), the threaded tube (8) is connected to the valve plate (7), the threaded rod (9) is rotatably mounted on the valve body shell (1), the threaded rod (9) is threadedly connected to the threaded tube (8), and the hand wheel (6) is installed at the upper end of the threaded rod (9); The limit mechanism installation shell (4) is installed at the upper end of the valve body shell (1); the threaded rod (9) movably penetrates the limit mechanism installation shell (4); a rotating disk (11) located inside the limit mechanism installation shell (4) is installed on the threaded rod (9); a limit block (14) is connected to the rotating disk (11); a plurality of rotating shafts (12) are rotatably installed on the limit mechanism installation shell (4); a limit ring (13) is installed on the rotating shaft (12); a notch (131) for the limit block (14) to penetrate is opened on the side of the limit ring (13); one end of the rotating shaft (12) extends to the outside of the limit mechanism installation shell (4) and is installed with a knob (15).
2. A limiting mechanism according to claim 1, characterized in that: A plurality of cylinders (16) are installed on the outer periphery of the limit mechanism installation shell (4), a plurality of rotating shafts (12) respectively movably penetrate the plurality of cylinders (16), an angle scale (18) is installed on the cylinder (16), and a pointer (17) is installed on the knob (15).
3. A limiting mechanism according to claim 1, characterized in that: Sealing rings (5) are installed on both sides of the inner wall of the valve body shell (1).
4. A limiting mechanism according to claim 1, characterized in that: A filter screen (10) is installed on the inner side of the water inlet connecting pipe (2).
5. A limiting mechanism according to claim 1, characterized in that: A sealing gasket (19) is provided at the upper end of the valve plate (7).
6. A limiting mechanism according to claim 1, characterized in that: An anti-corrosion layer is provided on the inner walls of the valve body shell (1), the water inlet connecting pipe (2) and the water outlet connecting pipe (3), and the anti-corrosion layer is an acid-resistant and alkali-resistant anti-corrosion coating of type RLHY-903.
7. A gate valve, characterized in that: It comprises the limiting mechanism described in any one of claims 1 to 6.
Citation Information
Patent Citations
Gate valve of limiting mechanism
CN212080208U