A retractable and adjustable extended rod gate valve structure

Abstract

This utility model relates to the field of gate valve technology and discloses a telescopic adjustable extended rod gate valve structure, including a valve body, a valve stem inside the valve body, an adjusting groove at the top of the valve stem, a telescopic rod sleeved inside the valve stem, a handwheel fixedly connected to the top of the telescopic rod, a pipe clamp sleeve sleeved on the surface of the adjusting groove, a threaded rod sleeved inside the pipe clamp sleeve, a threaded sleeve threaded to the right end of the threaded rod, and a connecting rod fixedly connected to the left end of the threaded rod. The connecting rod is rotatably connected to a quick-connect handle via a fixing component. This utility model, through the setting of a quick-connect handle-eccentric fixing component-pad-pipe clamp linkage clamping mechanism, allows the eccentricity to be axially displaced by turning the quick-connect handle, instantly loosening or tightening the pipe clamp sleeve, achieving stepless extension and quick locking of the telescopic rod. This enables a single person to manually adjust the length of the extended rod and immediately position it without any additional tools.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically to a telescopic and adjustable extended rod gate valve structure. Background Technology

[0002] Gate valves are one of the most commonly used types of shut-off valves. They are fully opened or fully closed by vertically raising and lowering the gate along the valve body channel axis. They are characterized by low flow resistance, reliable sealing, bidirectional sealing, and almost zero leakage of the medium when fully open. Therefore, they are widely installed on the main pipelines of long-distance pipelines, municipal water supply and drainage, petrochemical and power systems.

[0003] To meet the needs of underground, pipe gallery, and deep well operations, an extension rod is often attached to the upper end of the valve stem to bring the handwheel to the ground or operating platform, enabling on-site opening and closing without opening the cover. Traditionally, the extension rod is made of multiple sections of welded steel pipe or rigidly connected by threads, and the length is fixed at the factory. It cannot be adjusted on-site according to changes in well depth, resulting in the handwheel being too high or too low. Operators need to use ladders or squat down, which is labor-intensive and inefficient. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a telescopic and adjustable extended rod gate valve structure, including a valve body, a valve stem inside the valve body, an adjusting groove at the top of the valve stem, a telescopic rod sleeved inside the valve stem, a handwheel fixedly connected to the top of the telescopic rod, a pipe clamp sleeve sleeved on the surface of the adjusting groove, a threaded rod sleeved inside the pipe clamp sleeve, a threaded sleeve threaded to the right end of the threaded rod, a connecting rod fixedly connected to the left end of the threaded rod, a quick-connect handle rotatably connected to the connecting rod via a fixing component, a pad sleeved on the surface of the connecting rod, and a gasket sleeved on the surface of the threaded rod.

[0005] Through the above technical solution, by setting an integrated telescopic locking mechanism of valve stem-telescopic rod-quick-insert handle-pipe clamp, the clamping force of the pipe clamp on the telescopic rod can be instantly changed by turning the quick-insert handle using the principle of eccentric cam, realizing stepless adjustment of the extension rod length and quick locking with one hand; after adjustment, the telescopic rod and valve stem are rigidly connected coaxially, and the handwheel torque is directly transmitted to the gate, with no idle stroke, achieving the effect of setting the length in one go and immediately putting it into opening and closing operation in confined spaces such as deep wells and narrow well chambers without the need for auxiliary tools.

[0006] As a further improvement to the above solution, the top of the pipe clamp and the top of the adjusting groove are located on the same plane.

[0007] Through the above technical solution, the top of the pipe clamp is flush with the top of the adjustment groove, eliminating the axial step and avoiding the accumulation of mud and sand that could cause the clamp to jam. At the same time, it ensures that the clamping force is evenly distributed along the entire adjustment groove, the telescopic rod is subjected to symmetrical force, and it is not prone to uneven wear during long-term operation.

[0008] As a further improvement to the above solution, the gasket is located at the end of the tube clamp and the quick-connect handle that are close to each other, and the gasket is located between the tube clamp and the threaded sleeve.

[0009] Through the above technical solution, the pad is placed between the pipe clamp and the quick insert handle, which converts the eccentric pressure of the quick insert handle into a uniform surface pressure on the pipe clamp, preventing local crushing; the gasket is placed between the pipe clamp and the threaded sleeve, which isolates rotational friction, protects the end face of the pipe clamp from direct wear by the threaded sleeve, and extends the service life of the clamping pair.

[0010] As a further improvement to the above solution, the fixing member is located inside the quick-connect handle at a position off-center from the axis.

[0011] With the above technical solution, the fixing component is offset from the axis of the quick-connect handle, so that the handle forms a cam effect, and a large axial stroke can be generated by turning it at a small angle.

[0012] As a further improvement to the above solution, the fixing component includes a rotating sleeve, the top of which is threaded with an internal hex bolt.

[0013] Through the above technical solution, the rotating sleeve and the internal hex bolt are combined to form a detachable hinge. The top of the internal hex bolt is recessed into the rotating sleeve, with no protruding edges, which avoids interference with surrounding pipelines when the handle is rotated. Moreover, after the bolt is loosened, the quick-connect handle, connecting rod and pad can be pulled out laterally as a whole, realizing tool-free maintenance.

[0014] As a further improvement to the above solution, the left end of the connecting rod is fitted inside the rotating sleeve, and the bottom of the internal hex bolt contacts the top of the connecting rod.

[0015] With the above technical solution, the left end of the connecting rod is sleeved in the rotating sleeve and tightened by the internal hex bolt to form a cantilever beam fixation. The bottom of the bolt is directly pressed on the plane of the connecting rod to prevent circumferential slippage. When it is necessary to replace the quick-connect handle, the connecting rod can be pulled out horizontally simply by unscrewing the bolt.

[0016] As a further improvement to the above solution, flanges are fixedly connected to the left and right ends of the valve body, and a sealing groove is opened at the end of the flange away from the valve body, and a sealing gasket is snapped into the inside of the sealing groove.

[0017] With the above technical solution, the flanges at both ends of the valve body have built-in sealing grooves, and the sealing gaskets are pre-locked in the grooves, so the sealing gaskets will not fall off during transportation and hoisting.

[0018] As a further improvement to the above solution, the thickness of the sealing groove is less than the thickness of the sealing gasket.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model features a quick-connect handle, eccentric fixing component, pad, and pipe clamping mechanism. By moving the quick-connect handle, the eccentricity can be axially displaced, instantly loosening or tightening the pipe clamp, thus achieving stepless extension and quick locking of the telescopic rod. This allows a single person to adjust the length of the extension rod by hand and immediately position it without any additional tools.

[0021] This invention features a fine-tuning assembly consisting of a threaded rod, a threaded sleeve, and a washer. Rotating the threaded sleeve changes the opening size of the pipe clamp, allowing for precise increases or decreases in clamping force. This achieves the effect of accurately adjusting the grip tightness of the telescopic rod even after quick insertion and locking, preventing loosening or excessive tightness and jamming after long-term use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the disassembled structure of the valve stem integral connection of this utility model;

[0024] Figure 3 This is a schematic diagram of the overall connection and disassembly structure of the pipe clamp of this utility model;

[0025] Figure 4 This is a schematic diagram of the separation structure of the sealing gasket and sealing groove of this utility model.

[0026] In the diagram: 1. Valve body; 2. Valve stem; 3. Adjusting groove; 4. Telescopic rod; 5. Handwheel; 6. Pipe clamp; 7. Threaded rod; 8. Threaded sleeve; 9. Connecting rod; 10. Quick-release handle; 11. Gasket; 12. Washer; 13. Rotating sleeve; 14. Socket head bolt; 15. Flange; 16. Sealing groove; 17. Sealing gasket. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0028] Example 1:

[0029] Please combine Figure 1-4This embodiment of an extendable and adjustable extended rod gate valve structure includes a valve body 1, a valve stem 2 inside the valve body 1, an adjustment groove 3 at the top of the valve stem 2, a telescopic rod 4 sleeved inside the valve stem 2, a handwheel 5 fixedly connected to the top of the telescopic rod 4, a pipe clamp sleeve 6 sleeved on the surface of the adjustment groove 3, a threaded rod 7 sleeved inside the pipe clamp sleeve 6, a threaded sleeve 8 threadedly connected to the right end of the threaded rod 7, a connecting rod 9 fixedly connected to the left end of the threaded rod 7, a quick-connect handle 10 rotatably connected to the connecting rod 9 through a fixing component, a pad 11 sleeved on the surface of the connecting rod 9, and a gasket 12 sleeved on the surface of the threaded rod 7.

[0030] During adjustment, pull the quick-connect handle 10, causing it to rotate around the fixed part. Since the fixed part is off-center from the quick-connect handle 10, the pressure exerted on the pad 11 by the end of the quick-connect handle 10 near the pipe clamp 6 is loosened when the quick-connect handle 10 rotates. Simultaneously, the pressure exerted on the pipe clamp 6 by the pad 11 is reduced. Then, pull the telescopic rod 4 upward to increase the overall length of the valve stem 2. After adjustment, rotate the quick-connect handle 10 around the fixed part, causing the end of the quick-connect handle 10 near the pipe clamp 6 to press on the valve stem 2. When the valve stem 2 is compressed, the diameter of the adjusting groove 3 decreases, and the inner wall of the valve stem 2 presses on the telescopic rod 4, thus fixing the telescopic rod 4.

[0031] The top of the pipe clamp 6 and the top of the adjusting groove 3 are located on the same plane. The top of the pipe clamp and the top of the adjusting groove are flush, eliminating axial steps and avoiding the accumulation of mud and sand that could cause the clamp to jam. At the same time, it ensures that the clamping force is evenly distributed along the entire adjusting groove, and the telescopic rod is subjected to symmetrical force, making it less prone to uneven wear during long-term operation.

[0032] The pad 11 is located at the end of the pipe clamp 6 and the quick insert handle 10 that are close to each other, and the gasket 12 is located between the pipe clamp 6 and the threaded sleeve 8. It converts the eccentric pressure of the quick insert handle into a uniform surface pressure on the pipe clamp to prevent local crushing. The gasket is placed between the pipe clamp and the threaded sleeve to isolate rotational friction, protect the end face of the pipe clamp from direct wear by the threaded sleeve, and extend the service life of the clamping pair.

[0033] The fixing element is located inside the quick-connect handle 10, off-center from the axis. The fixing element is off-center from the axis of the quick-connect handle, which makes the handle form a cam effect, so that a large axial stroke can be generated by turning it at a small angle.

[0034] The fastener includes a rotating sleeve 13, the top of which is threaded with an internal hex bolt 14.

[0035] The left end of the connecting rod 9 is fitted inside the rotating sleeve 13, and the bottom of the internal hex bolt 14 contacts the top of the connecting rod 9.

[0036] Flanges 15 are fixedly connected to the left and right ends of the valve body 1. A sealing groove 16 is provided at the end of the flange 15 away from the valve body 1, and a sealing gasket 17 is snapped into the inside of the sealing groove 16.

[0037] The thickness of the sealing groove 16 is less than the thickness of the sealing gasket 17. When the flange bolts are tightened, the sealing gasket is compressed and undergoes elastic deformation. The amount of deformation is limited within the groove depth range, which ensures the sealing pressure and avoids excessive compression that could cause cold flow in the sealing gasket. This maintains the resilience for a long time and reduces the leakage rate.

[0038] The implementation principle of the telescopic adjustable extended rod gate valve structure in this application embodiment is as follows: When adjusting the extension of the gate valve extension rod, first pull the quick-insertion handle 10 so that the quick-insertion handle 10 rotates around the fixed part as the axis. Since the position of the fixed part is off from the axis of the quick-insertion handle 10, when the quick-insertion handle 10 rotates, the squeezing force of the quick-insertion handle 10 near the pipe clamp 6 on the pad 11 is loosened, and the squeezing force of the pad 11 on the pipe clamp 6 is reduced. Then, the telescopic rod 4 is pulled upward to increase the overall length of the valve stem 2. After the adjustment is completed, the quick-insertion handle 10 is rotated around the fixed part as the axis so that the end of the quick-insertion handle 10 near the pipe clamp 6 squeezes the valve stem 2. When the valve stem 2 is compressed, the diameter of the adjusting groove 3 decreases, and the inner wall of the valve stem 2 squeezes the telescopic rod 4 to fix the telescopic rod 4.

[0039] When it is necessary to adjust the tightness of the telescopic rod 4, rotate the threaded sleeve 8 so that the threaded sleeve 8 rotates inside the threaded rod 7, thereby increasing or decreasing the position of the opening of the pipe clamp sleeve 6, increasing or decreasing the squeezing force of the telescopic rod 4, so as to adjust the tightness of the telescopic rod 4 after it is fixed.

[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A telescopic adjustment lengthening stem gate valve structure, characterized by: The valve includes a valve body (1), a valve stem (2) inside the valve body (1), an adjustment groove (3) at the top of the valve stem (2), a telescopic rod (4) inside the valve stem (2), a handwheel (5) fixedly connected to the top of the telescopic rod (4), a pipe clamp (6) on the surface of the adjustment groove (3), a threaded rod (7) inside the pipe clamp (6), a threaded sleeve (8) threaded to the right end of the threaded rod (7), a connecting rod (9) fixedly connected to the left end of the threaded rod (7), a quick-connect handle (10) rotatably connected to the connecting rod (9) through a fixing component, a pad (11) on the surface of the connecting rod (9), and a gasket (12) on the surface of the threaded rod (7).

2. A telescopic-adjustment lengthening rod gate valve structure according to claim 1, characterized in that: The top of the pipe clamp (6) and the top of the adjusting groove (3) are on the same plane.

3. A telescopic adjustable length stem gate valve structure as defined in claim 1 wherein: The gasket (11) is located at one end of the tube clamp (6) and the quick insert handle (10) that are close to each other, and the gasket (12) is located between the tube clamp (6) and the threaded sleeve (8).

4. A telescopic-adjustment lengthening rod gate valve structure according to claim 1, characterized in that: The fastener is located inside the quick-connect handle (10) at a position off-center from the axis.

5. A telescopic adjustable length stem gate valve structure as defined in claim 1 wherein: The fastener includes a rotating sleeve (13), the top of which is threaded with an internal hex bolt (14).

6. A telescopic-adjustment lengthening rod gate valve structure according to claim 5, characterized in that: The left end of the connecting rod (9) is sleeved inside the rotating sleeve (13), and the bottom of the internal hex bolt (14) is in contact with the top of the connecting rod (9).

7. A telescopic adjustable length stem gate valve structure as defined in claim 1 wherein: The valve body (1) is fixedly connected to the left and right ends of the valve body (1). A sealing groove (16) is provided at the end of the flange (15) away from the valve body (1). A sealing gasket (17) is snapped into the inside of the sealing groove (16).

8. A telescopic-adjustment lengthening rod gate valve structure according to claim 7, characterized in that: The thickness of the sealing groove (16) is less than the thickness of the sealing gasket (17).

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