Gate valve with soft seal

Abstract

The utility model discloses a gate valve with soft seal relates to gate valve technical field, including valve body, both sides of valve body lower extreme are equipped with flange joint, the upper end of valve body is equipped with valve cover, the inside of valve body is equipped with valve core, both sides of the inside of valve body are equipped with sealing boss, the upper end of valve cover is equipped with the adjusting assembly for adjusting the position of valve core, the both sides of valve core all are seted up with the installation circular groove, be equipped with the pressing ring in the installation circular groove, the middle fixedly connected with the recessed disc of pressing ring, the recessed disc and installation circular groove slidingly connected, the upper part of pressing ring is wrapped with soft sealing element, the utility model discloses through setting up soft sealing element can guarantee the sealing effect of valve core and sealing ring when working, and rubber seal cover adopts pressing ring, pressing plate and screw fixed on valve core, so that the rubber seal cover can be conveniently replaced after subsequent rubber seal cover abrasion or damage, greatly improve the convenience of subsequent maintenance.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a gate valve with a soft seal. Background Technology

[0002] Gate valves, as a commonly used fluid control valve, are widely used in various industrial and civil fields such as petroleum, chemical, water supply, and heating. Their core function is to control the opening and closing of pipelines through the rising and falling movement of the valve core. A typical gate valve mainly consists of components such as the valve body, valve core, valve stem, valve cover, and sealing structure. Among these, the performance of the sealing structure directly determines the sealing reliability and service life of the gate valve.

[0003] During the long-term use of gate valves, the sealing ring on the valve core, as a vulnerable part, will gradually age, deform or be damaged due to factors such as fluid erosion, friction and wear, media corrosion and temperature changes, which will lead to a decline in valve sealing performance and cause leakage problems. Therefore, in order to improve the service life of gate valves, it is generally necessary to replace the soft seal on the gate valve core regularly.

[0004] Currently, the connection methods between the valve core and the soft seal in existing technologies are mostly fixed bonding, interference fit, or integrated injection molding. After the seal ring installed in this structure is damaged, it is not easy to remove the old seal ring from the valve core. The replacement of the seal ring is difficult, cumbersome and time-consuming, which increases maintenance costs. In order to address the above problems, we provide a gate valve with a soft seal to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a gate valve with a soft seal to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A gate valve with a soft seal includes a valve body, flange joints on both sides of the lower end of the valve body, a valve cover on the upper end of the valve body, a valve core inside the valve body, sealing bosses on both sides of the valve body, an adjusting component for adjusting the position of the valve core on the upper end of the valve cover, mounting grooves on both sides of the valve core, a pressure ring inside the mounting groove, a concave plate fixedly connected in the middle of the pressure ring, the concave plate being slidably connected to the mounting groove, a soft seal being wrapped around the pressure ring, and a fixing component for fixing to the mounting groove being provided inside the concave plate.

[0008] As a further embodiment of this utility model: the adjusting component includes a threaded valve stem, which passes through the middle hole of the valve cover. A bottom protrusion is fixedly connected to the lower end of the threaded valve stem. A U-shaped groove that mates with the bottom protrusion is provided at the upper end of the valve core. The bottom protrusion is hooked into the U-shaped groove. A mounting bracket is fixedly connected to the upper end of the valve cover. A lifting component for driving the threaded valve stem to move up and down is provided on the mounting bracket.

[0009] As a further improvement of this utility model: both sides of the valve body are fixedly connected to limit slide bars, and both sides of the valve core are provided with side slide grooves, which are slidably connected to the limit slide bars.

[0010] As a further improvement of this utility model: the inner wall of the middle hole of the valve cover is provided with several annular grooves, and a sealing ring is provided in each annular groove. The smooth part of the threaded valve stem is slidably connected to the sealing ring.

[0011] As a further embodiment of this utility model: the lifting assembly includes a threaded rotating sleeve, which is rotatably connected to the upper end of the mounting bracket, and is threadedly connected to a threaded valve stem, with a rotating handle fixedly connected to the threaded rotating sleeve.

[0012] As a further embodiment of this utility model: the soft seal includes a rubber sealing sleeve that matches the shape of the pressure ring, the rubber sealing sleeve is wrapped around the pressure ring, the pressure ring has a positioning ring groove on the side near the mounting groove, and the opening of the rubber sealing sleeve is provided with a positioning ring that matches the positioning ring groove.

[0013] As a further embodiment of this utility model: the fixing component includes a pressure plate, which is disposed in the middle groove of the rubber sealing sleeve. A plurality of threaded holes are provided in the mounting groove. Through holes are provided on the pressure plate, the rubber sealing sleeve, and the concave plate. Screws are inserted into the through holes and are threadedly connected to the threaded holes.

[0014] As a further embodiment of this utility model: the valve cover and the valve body are both fixedly connected to a connecting flange at opposite ends, the two connecting flanges are connected by bolts, and a sealing gasket is provided between the two connecting flanges.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention ensures the sealing effect between the valve core and the sealing ring during operation by setting a soft sealing element. At the same time, the rubber sealing sleeve is fixed to the valve core by a pressure ring, pressure plate and screws, which makes it easy to replace the rubber sealing sleeve after wear or damage, greatly improving the convenience of subsequent maintenance. In addition, when the rubber sealing sleeve is installed, the rubber sealing sleeve is pressed by the pressure ring and pressure plate to ensure the stability of the rubber sealing sleeve and avoid the problem of seal detachment during the use of the gate valve.

[0017] The bottom protrusion and convex groove of this utility model facilitate the separation of the threaded valve stem and valve core, thereby making it easier to disassemble the valve core separately and further improving the convenience of replacing the seal. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional view of the valve body and valve cover in this utility model.

[0020] Figure 3 This is a schematic diagram of the adjustment component in this utility model.

[0021] Figure 4 This is a schematic diagram of a partially disassembled structure of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the rubber sealing sleeve and the pressure ring when they are disassembled in this utility model.

[0023] Figure 6 This is a schematic diagram of the structure when the rubber sealing sleeve and the pressure ring are connected in this utility model.

[0024] The components are: 1. Valve body; 2. Perforation; 3. Flange joint; 4. Connecting flange; 5. Screw; 6. Mounting bracket; 7. Threaded swivel; 8. Threaded valve stem; 9. Rotating handle; 10. Pressure plate; 11. Valve cover; 12. Limiting slide bar; 13. Side slide groove; 14. Valve core; 15. Rubber sealing sleeve; 16. Sealing boss; 17. T-shaped groove; 18. Sealing ring; 19. Mounting circular groove; 20. Pressure ring; 21. Threaded hole; 22. Concave plate; 23. Bottom protrusion; 24. Positioning ring; 25. Positioning ring groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-2In this embodiment of the present invention, a gate valve with a soft seal includes a valve body 1. Flange joints 3 are provided on both sides of the lower end of the valve body 1. A valve cover 11 is provided on the upper end of the valve body 1. A valve core 14 is provided inside the valve body 1. Sealing bosses 16 are provided on both sides of the inside of the valve body 1. Limiting slide bars 12 are fixedly connected to both sides of the inside of the valve body 1. Side sliding grooves 13 are provided on both sides of the valve core 14, and the side sliding grooves 13 are slidably connected to the limiting slide bars 12. The flange joints 3 are used to fix the valve body 1 to an external pipeline. The valve core 14 slides and engages with the limiting slide bars 12 on both sides of the inside of the valve body 1 through the side sliding grooves 13 on both sides, allowing it to rise and fall stably along the limiting slide bars 12. When the valve core 14 descends to fit against the sealing bosses 16 on both sides of the inside of the valve body 1, the pipeline is sealed and shut off. When the valve core 14 rises and disengages from the sealing bosses 16, fluid can flow along the internal channel of the valve body 1.

[0027] Please see Figures 1-3 The valve cover 11 has an adjustment assembly at its upper end for adjusting the position of the valve core 14. The adjustment assembly includes a threaded valve stem 8, which passes through the middle hole of the valve cover 11. A bottom protrusion 23 is fixedly connected to the lower end of the threaded valve stem 8. The upper end of the valve core 14 has a U-shaped groove 17 that mates with the bottom protrusion 23. The bottom protrusion 23 is hooked into the U-shaped groove 17. A mounting bracket 6 is fixedly connected to the upper end of the valve cover 11. The mounting bracket 6 has a lifting mechanism for moving the threaded valve stem 8 up and down. The lifting assembly includes a threaded sleeve 7, which is rotatably connected to the upper end of the mounting bracket 6. The threaded sleeve 7 is threadedly connected to the threaded valve stem 8, and a rotating handle 9 is fixedly connected to the threaded sleeve 7. In use, rotating the rotating handle 9 can drive the threaded sleeve 7 to rotate, causing the threaded valve stem 8 to move up and down axially. Because the bottom protrusion 23 at the lower end of the threaded valve stem 8 is hooked into the convex groove 17 at the upper end of the valve core 14, the lifting and lowering of the threaded valve stem 8 will synchronously drive the valve core 14 to adjust its position, thereby adjusting the valve opening.

[0028] Please see Figure 3 The valve cover 11 has several annular grooves on the inner wall of the central hole, and each annular groove is provided with a sealing ring 18. The smooth part of the threaded valve stem 8 is slidably connected to the sealing ring 18. When the threaded valve stem 8 moves up and down along the central hole, its smooth part maintains a sliding fit with the sealing ring 18 in the annular groove. The sealing ring 18 can effectively fill the gap between the two, realizing a dynamic seal between the threaded valve stem 8 and the valve cover 11, and preventing fluid leakage from the central hole.

[0029] Please see Figures 4-6The valve core 14 has mounting grooves 19 on both sides, and a pressure ring 20 is provided in the mounting groove 19. A concave plate 22 is fixedly connected in the middle of the pressure ring 20. The concave plate 22 is slidably connected to the mounting groove 19. A soft sealing element is wrapped on the pressure ring 20. The soft sealing element includes a rubber sealing sleeve 15 that matches the shape of the pressure ring 20. The rubber sealing sleeve 15 is wrapped on the pressure ring 20. A positioning ring groove 25 is provided on the side of the pressure ring 20 near the mounting groove 19. A positioning ring 24 that matches the positioning ring groove 25 is provided at the opening of the rubber sealing sleeve 15. The rubber sealing sleeve 15 can be wrapped on the pressure ring 20 and forms a seal when it cooperates with the sealing boss 16. The middle of the rubber sealing sleeve 15 is pressed and fixed by the pressure plate 10. When fixed, the pressure ring 20 presses and fixes the positioning ring 24 on the edge of the rubber sealing sleeve 15 to ensure the stability of the rubber sealing sleeve 15 installation.

[0030] Please see Figure 4 The concave plate 22 is provided with a fixing component for fixing to the mounting groove 19; the fixing component includes a pressure plate 10, which is located in the middle groove of the rubber sealing sleeve 15. The mounting groove 19 has a plurality of threaded holes 21. The pressure plate 10, the rubber sealing sleeve 15, and the concave plate 22 are all provided with through holes 2. Screws 5 are inserted into the through holes 2 and are threadedly connected to the threaded holes 21. The rubber sealing sleeve 15 is wrapped around the pressure ring 20. The positioning ring 24 at its opening is inserted into the positioning ring groove 25 of the pressure ring 20 to achieve initial positioning. When fixing, the pressure plate 10 is placed in the middle groove of the rubber sealing sleeve 15. The screws 5 pass through the through holes 2 on the pressure plate 10, the rubber sealing sleeve 15, and the concave plate 22 and are threadedly connected to the threaded holes 21 of the mounting groove 19 to fasten the three together.

[0031] Please see Figure 1 The valve cover 11 and the valve body 1 are both fixedly connected to one end of the valve body 1. The two connecting flanges 4 are connected by bolts, and a sealing gasket is provided between the two connecting flanges 4. The valve cover 11 and the valve body 1 are connected by the connecting flanges 4 fixed at their respective ends. The bolts pass through the two connecting flanges 4 to achieve a tight connection, so that the valve cover 11 and the valve body 1 form an integral whole. The sealing gasket between the two connecting flanges 4 can fill the gap to prevent fluid from leaking from the connection and ensure sealing.

[0032] The working principle of this utility model is as follows: When in use, the operator rotates the rotating handle 9 to drive the threaded rotating sleeve 7 to rotate. Since the threaded rotating sleeve 7 is threadedly engaged with the threaded valve stem 8, the rotation of the threaded rotating sleeve 7 will be converted into the axial up and down movement of the threaded valve stem 8, thereby driving the valve core 14 to rise and fall synchronously. The valve core 14 slides with the limiting slide bar 12 inside the valve body 1 through the side sliding grooves 13 on both sides, ensuring that the lifting process is stable and without deviation. The up and down movement of the valve core 14 can realize the adjustment of the valve opening.

[0033] Meanwhile, when installing the soft seal, the rubber sealing sleeve 15 is wrapped around the pressure ring 20, and then the positioning ring 24 at the opening of the rubber sealing sleeve 15 is placed in the positioning ring groove 25 of the pressure ring 20 to complete the initial positioning. Then, the screw 5 passes through the through hole 2 on the pressure plate 10, the rubber sealing sleeve 15 and the concave plate 22, and is threadedly connected to the threaded hole 21 of the mounting groove 19, thus fastening the rubber sealing sleeve 15, the pressure ring 20 and the valve core 14 into one piece. When the rubber sealing sleeve 15 on the valve core 14 is in contact with the sealing boss 16, the pipeline is sealed and shut off. When the valve core 14 rises and disengages from the sealing boss 16, the fluid can flow along the internal channel of the valve body 1.

[0034] When the rubber sealing sleeve 15 needs to be replaced after wear, first remove the bolts on the connecting flange 4, then separate the valve cover 11 from the valve body 1. After separation, pull the threaded valve stem 8 out of the valve body 1. After pulling it out, separate the convex groove 17 on the valve core 14 from the bottom protrusion 23, and then remove the screw 5. The rubber sealing sleeve 15 can then be replaced.

[0035] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Although this specification describes embodiments, not every embodiment contains only one technical solution. This method of description is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gate valve with a soft seal, comprising a valve body (1), wherein flange joints (3) are provided on both sides of the lower end of the valve body (1), characterized in that: The valve body (1) is provided with a valve cover (11) at the upper end. The valve body (1) is provided with a valve core (14) inside. The valve body (1) is provided with sealing bosses (16) on both sides inside. The valve cover (11) is provided with an adjustment component for adjusting the position of the valve core (14) at the upper end. The valve core (14) is provided with mounting grooves (19) on both sides. The mounting grooves (19) are provided with pressure rings (20). The pressure rings (20) are fixedly connected with concave plates (22) in the middle. The concave plates (22) are slidably connected to the mounting grooves (19). The pressure rings (20) are wrapped with soft seals. The concave plates (22) are provided with fixing components for fixing to the mounting grooves (19).

2. A gate valve with a soft seal according to claim 1, characterized in that, The adjusting assembly includes a threaded valve stem (8), which passes through the middle hole of the valve cover (11). The lower end of the threaded valve stem (8) is fixedly connected to a bottom protrusion (23). The upper end of the valve core (14) is provided with a U-shaped groove (17) that cooperates with the bottom protrusion (23). The bottom protrusion (23) is hooked in the U-shaped groove (17). The upper end of the valve cover (11) is fixedly connected to a mounting bracket (6). The mounting bracket (6) is provided with a lifting assembly for driving the threaded valve stem (8) to move up and down.

3. A gate valve with a soft seal according to claim 2, characterized in that, The valve body (1) has a limit slide bar (12) fixedly connected to both sides inside, and the valve core (14) has a side slide groove (13) on both sides, and the side slide groove (13) is slidably connected to the limit slide bar (12).

4. A gate valve with a soft seal according to claim 3, characterized in that, The valve cover (11) has several annular grooves on the inner wall of the middle hole, and each annular groove is provided with a sealing ring (18). The smooth part of the threaded valve stem (8) is slidably connected to the sealing ring (18).

5. A gate valve with a soft seal according to claim 4, characterized in that, The lifting assembly includes a threaded rotating sleeve (7), which is rotatably connected to the upper end of the mounting bracket (6). The threaded rotating sleeve (7) is threadedly connected to the threaded valve stem (8), and a rotating handle (9) is fixedly connected to the threaded rotating sleeve (7).

6. A gate valve with a soft seal according to claim 1, characterized in that, The soft seal includes a rubber sealing sleeve (15) that matches the shape of the pressure ring (20). The rubber sealing sleeve (15) wraps around the pressure ring (20). The pressure ring (20) has a positioning ring groove (25) on the side near the mounting groove (19). The opening of the rubber sealing sleeve (15) is provided with a positioning ring (24) that matches the positioning ring groove (25).

7. A gate valve with a soft seal according to claim 6, characterized in that, The fixing component includes a pressure plate (10), which is located in the middle groove of the rubber sealing sleeve (15). The mounting groove (19) has several threaded holes (21). The pressure plate (10), the rubber sealing sleeve (15), and the concave plate (22) all have through holes (2). Screws (5) are inserted into the through holes (2), and the screws (5) are threaded into the threaded holes (21).

8. A gate valve with a soft seal according to claim 1, characterized in that, The valve cover (11) and the valve body (1) are both fixedly connected to a connecting flange (4) at opposite ends. The two connecting flanges (4) are connected by bolts, and a sealing gasket is provided between the two connecting flanges (4).

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