A gate valve with a concealed stem

Abstract

The utility model relates to valve technical field, especially a kind of occult rod sluice valve, including valve body, fluid passage is equipped on the valve body, valve cover is also equipped on the valve body, valve rod is rotatably equipped on the valve cover, valve plate is equipped in the valve body, sliding chute matched with valve plate is also equipped in the valve body, lifting device is equipped between the valve rod and valve plate, two valve seat rings are equipped on the fluid passage by clamping device.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a non-stem gate valve. Background Technology

[0002] Pipeline fittings are commonly used in pipeline connections, among which non-stem gate valves are one of the most frequently used. In existing technology, the valve seat and valve plate of a non-stem gate valve cooperate to form a seal to cut off the fluid. However, in most gate valves, the valve seat and valve body are integral or fixed by interference fit. As a result, the valve body is scrapped after the valve seat wears out, which is a great waste of resources. Utility Model Content

[0003] Therefore, in view of the above problems, this utility model proposes a non-stick gate valve.

[0004] To achieve the above objectives, the present invention provides a non-sunken gate valve, comprising a valve body, a fluid passage on the valve body, a valve cover on the valve body, a valve stem rotatably mounted on the valve cover, a valve plate inside the valve body, a sliding groove matching the valve plate inside the valve body, a lifting device between the valve stem and the valve plate, and two valve seat rings on the fluid passage via a locking device.

[0005] A further improvement is that the engaging device includes: mounting grooves for mounting valve seat rings are provided on both sides of the slide groove; the valve seat ring is provided with at least two locking blocks; the mounting groove is provided with an insertion groove that matches the locking blocks; and the mounting groove is also provided with a screw-in groove that communicates with the insertion groove.

[0006] A further improvement is that an elastic sealing layer is provided on the side of the valve seat ring near the bottom of the mounting groove, and a locking groove is provided on the mounting groove that communicates with the screw-in groove and faces the valve plate.

[0007] A further improvement is that when the card block is inserted into the insertion slot, a rounded corner is provided on the side near the screw-in slot.

[0008] A further improvement is that the valve plate is conical, and the valve seat ring is configured to match the valve plate.

[0009] A further improvement is that: the valve cover is provided with a rotating hole, the valve cover is provided with a packing groove located at the rotating hole, the packing groove is provided with sealing packing, the valve cover is also provided with a packing cover, the packing groove is also provided with a bearing and the bearing is located between the packing cover and the packing, and the inner ring of the bearing is fixedly connected to the valve stem.

[0010] A further improvement is that the lifting device includes: a sliding hole on the valve plate, an opening and closing nut corresponding to the sliding hole on the valve plate, and an opening and closing thread on the valve stem that matches the opening and closing nut.

[0011] A further improvement is that the slide is also provided with a guide block, and the valve plate is provided with a guide groove that engages with the guide block.

[0012] A further improvement is that a handwheel is also provided on the valve stem.

[0013] A further improvement is that the valve body is equipped with a connecting flange for easy installation.

[0014] The advantages and beneficial effects of this utility model are as follows:

[0015] With its simple structure and convenient use, the valve features a detachable valve seat ring, making it easy for users to replace the seat ring when wear affects the seal. This reduces valve maintenance costs, improves maintenance efficiency, and avoids the scrapping of the valve body, greatly reducing resource waste. Attached Figure Description

[0016] Figure 1 This is a front sectional view of a gate valve with a non-sunken stem according to the present invention;

[0017] Figure 2 This is a cross-sectional view of a gate valve with a non-stalk, valve plate, and valve seat ring not installed according to this utility model.

[0018] Figure 3 This is a schematic diagram of a valve seat ring for a gate valve with a non-stick stem according to the present invention;

[0019] Figure 4 This is a schematic diagram of a gate valve plate of the present invention.

[0020] Figure 5 This is an enlarged schematic diagram of part A of a non-stick gate valve according to this utility model;

[0021] In the diagram: 1. Valve body; 2. Fluid passage; 3. Valve cover; 4. Valve stem; 5. Valve plate; 6. Slide groove; 7. Handwheel; 8. Valve seat ring; 9. Mounting groove; 10. Locking block; 11. Insertion groove; 12. Screw-in groove; 13. Elastic sealing layer; 14. Locking groove; 15. Rounded corner; 16. Rotation hole; 17. Packing groove; 18. Sealing packing; 19. Packing cover; 20. Sliding hole; 21. Opening and closing nut; 22. Guide block; 23. Guide groove; 24. Connecting flange; 25. Bearing. Detailed Implementation

[0022] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0023] like Figures 1-5As shown, a non-sunken gate valve includes a valve body 1, a fluid passage 2 on the valve body 1, a valve cover 3 on the valve body 1, a valve stem 4 rotatably mounted on the valve cover 3, a valve plate 5 inside the valve body 1, a sliding groove 6 matching the valve plate 5 inside the valve body 1, a lifting device between the valve stem 4 and the valve plate 5, and two valve seat rings 8 mounted on the fluid passage 2 via a locking device.

[0024] To facilitate the disassembly and rotation of the valve seat ring 8, the locking device includes: mounting grooves 9 for mounting the valve seat ring 8 are provided on both sides of the slide groove 6; the valve seat ring 8 is provided with at least two locking blocks 10; the mounting groove 9 is provided with an insertion groove 11 that matches the locking block 10; and the mounting groove 9 is also provided with a screw-in groove 12 that communicates with the insertion groove 11.

[0025] To enhance engagement stability and further prevent fluid leakage, an elastic sealing layer 13 is provided on the side of the valve seat ring 8 near the bottom of the mounting groove 9, and a locking groove 14 connected to the screw-in groove 12 and facing the valve plate 5 is also provided on the mounting groove 9.

[0026] The elastic sealing layer 13 is a rubber layer.

[0027] To facilitate engagement, when the locking block 10 is inserted into the insertion slot 11, a rounded corner 15 is provided on the side near the screw-in slot 12.

[0028] To enhance sealing, the valve plate 5 is tapered, and the valve seat ring 8 is matched to the valve plate 5.

[0029] To facilitate the control of valve stem 4 rotation and prevent leakage, valve cover 3 is provided with a rotation hole 16, and a packing groove 17 is provided on valve cover 3 at the rotation hole 16. Sealing packing 18 is provided in the packing groove 17, and a packing cover 19 is also provided on valve cover 3. A bearing 25 is also provided in the packing groove 17 and the bearing 25 is located between the packing cover 19 and the packing. The inner ring of the bearing 25 is fixedly connected to valve stem 4.

[0030] To facilitate the control of the lifting and lowering of the valve plate 5, the lifting device includes: a sliding hole 20 on the valve plate 5, an opening and closing nut 21 corresponding to the sliding hole 20 on the valve plate 5, and an opening and closing thread (not shown in the figure) on the valve stem 4 that matches the opening and closing nut 21.

[0031] To enhance the stability of the valve plate 5 during lifting and lowering, a guide block 22 is provided on the slide 6, and a guide groove 23 is provided on the valve plate 5 that engages with the guide block 22.

[0032] To facilitate the rotation of the valve stem 4, a handwheel 7 is also provided on the valve stem 4.

[0033] To facilitate valve installation, the valve body 1 is provided with a connecting flange 24 for easy installation.

[0034] Working principle: During assembly, the valve seat ring 8 is placed into the mounting groove 9 so that the locking block 10 is aligned with the insertion groove 11. At this time, the valve seat ring 8 is pressed to move it towards the bottom of the mounting groove 9 until the locking block 10 abuts against the bottom of the insertion groove 11. Then, the valve seat ring 8 is rotated so that the locking block 10 enters the screw-in groove 12. The valve seat ring 8 is then rotated until the locking block 10 abuts against the bottom of the screw-in groove 12 and then released. At this time, the valve seat ring 8 can be locked into the locking groove 14 under the action of the elastic sealing layer 13, further preventing the valve seat ring 8 from falling off.

[0035] When in use, the valve stem 4 is rotated. Because the valve plate 5 is limited by the valve seat ring 8, the guide block 22 and the guide groove 23 to prevent it from rotating, the valve plate 5 will move up and down under the action of the valve stem 4 and the opening and closing nut 21, thereby opening or closing the valve.

[0036] When the valve seat ring 8 is worn, disassemble the valve, press the valve seat ring 8 and rotate it in the opposite direction to complete the disassembly, and then replace it with a new valve seat ring 8.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions above are only illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A non-sunken gate valve, comprising a valve body, a fluid passage thereon, a valve cover thereon, a valve stem rotatably mounted on the valve cover, a valve plate thereon inside the valve body, a sliding groove thereon matching the valve plate, and a lifting device therebetween the valve stem and the valve plate, characterized in that: The fluid channel is equipped with two valve seat rings via a locking device.

2. A gate valve according to claim 1, wherein: The locking device includes: mounting grooves for mounting valve seat rings are provided on both sides of the slide groove; the valve seat ring is provided with at least two locking blocks; the mounting groove is provided with an insertion groove that matches the locking blocks; and the mounting groove is also provided with a screw-in groove that communicates with the insertion groove.

3. A gate valve according to claim 2, wherein: An elastic sealing layer is provided on the side of the valve seat ring near the bottom of the mounting groove, and a locking groove is provided on the mounting groove that is connected to the screw-in groove and faces the valve plate.

4. A gate valve according to claim 2, wherein: When the card block is inserted into the insertion slot, a rounded corner is provided on the side near the screw-in slot.

5. A gate valve according to claim 1, wherein: The valve plate is conical, and the valve seat ring is configured to match the valve plate.

6. A gate valve according to claim 1, wherein: The valve cover is provided with a rotating hole, and a packing groove is provided at the rotating hole on the valve cover. Sealing packing is provided in the packing groove. The valve cover is also provided with a packing cover. A bearing is also provided in the packing groove and the bearing is located between the packing cover and the packing. The inner ring of the bearing is fixedly connected to the valve stem.

7. A gate valve according to claim 1 wherein: The lifting device includes: a sliding hole on the valve plate, an opening and closing nut corresponding to the sliding hole on the valve plate, and an opening and closing thread on the valve stem that matches the opening and closing nut.

8. A gate valve according to claim 7, wherein: The slide is also provided with a guide block, and the valve plate is provided with a guide groove that engages with the guide block.

9. A gate valve according to claim 1 wherein: The valve stem is also equipped with a handwheel.

10. A gate valve according to claim 1, wherein: The valve body is equipped with a connecting flange for easy installation.

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