Lifting type stop valve

Abstract

The utility model relates to a lifting type stop valve which comprises a valve body, a valve seat integrally formed with the valve body, a valve cover, a valve rod and a valve plate, a through hole is formed in the lower end of the valve plate, a sealing hole is formed in the upper end of the through hole, a sealing block is connected to the inner side of the sealing hole in a sliding mode, a connecting hole is formed in the valve plate and communicated with the sealing hole, and the sealing block is fixedly connected to the lower end of the valve rod. A limiting block in threaded connection with the valve plate is arranged at the upper end of the sealing block, a certain distance is reserved between the limiting block and the sealing block, and when only tiny water flow is needed, the valve rod is pulled upwards, the valve rod drives the clamping block to move upwards, and the clamping block drives the sealing block to move upwards through the positioning block. The sealing block moves upwards to enable the through hole to be communicated with the sealing hole, at the moment, the valve plate is not separated from the valve seat, the sealing hole is communicated with the connecting hole, a medium enters the sealing hole through the connecting hole and enters the through hole through the sealing hole, micro-flow conveying can be achieved, and due to the arrangement of the through hole and the connecting hole, opening of the valve plate is more labor-saving, and the pressure relief effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a lifting stop valve. Background Art

[0002] The utility model patent with application number: CN201520092638.2 discloses a stop valve unit including more than two connected in series, each stop valve unit includes a valve body, a valve cover, a valve stem and a valve plate, the valve body and the valve cover form a medium channel, the valve cover has a valve stem through hole for installing the valve stem, the medium channel has a straight segment, an arc segment and a disc plate cavity, the side of the straight segment of the medium channel is connected to the bottom of the disc plate cavity, the arc segment of the medium channel is connected to the side of the disc plate cavity, and the valve plate is installed at the tail end of the valve stem so as to open / close the side medium through hole of the straight segment of the medium channel as the valve stem moves up and down. In the above technical solution, the medium channel of each stop valve unit is composed of a straight segment, an arc segment and a disc plate cavity, the straight segment and the arc segment of the medium channel are staggered, and the side medium through hole of the straight segment of the medium channel can be blocked by an ordinary valve plate, which is conducive to improving the cut-off effect. When only a small water flow is required, the above technical solution cannot meet the requirements. Utility Model Content

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art and provides a lifting stop valve. A through hole and a connecting hole are opened on the valve plate. When the valve plate does not separate from the valve seat, water flow can be transported through the connecting hole and the through hole, so as to realize the transportation of a small flow rate.

[0004] The utility model adopts a technical solution to solve the technical problem: the lift type stop valve comprises a valve body, a valve seat integrally formed with the valve body, a valve cover detachably mounted on the upper end of the valve body, a valve stem located inside the valve body, the valve stem extends upward through the valve cover, a valve plate is mounted on the lower end of the valve stem, a through hole is formed at the lower end of the valve plate, a sealing hole is formed at the upper end of the through hole, a sealing block is slidably connected to the inner side of the sealing hole, the sealing block can seal the through hole, a connecting hole is formed on the valve plate, the connecting hole is communicated with the sealing hole, a sliding hole is formed at the upper end of the sealing block, a clamping block is fixedly connected to the lower end of the valve stem, the clamping block is slidably connected to the inner side of the sliding hole, a positioning block is provided at the upper end of the clamping block, a limiting block is provided at the upper end of the sealing block, the valve stem is slidably connected to the limiting block On the inner side of the positioning block, there is a certain distance between the limit block and the sealing block. When only a small water flow is needed, the valve stem is pulled upward, and the valve stem drives the clamping block to move upward, and the clamping block drives the sealing block to move upward through the positioning block. Since there is a certain distance between the sealing block and the limit block, the sealing block moves upward to connect the through hole with the sealing hole. At this time, the valve plate has not separated from the valve seat, and the sealing hole is connected with the connecting hole. The medium enters the sealing hole through the connecting hole and enters the through hole through the sealing hole, so as to realize the delivery of a small flow rate. The sealing block continues to move upward, so that the sealing block contacts the limit block and drives the limit block to move upward. The limit block drives the valve plate to move up away from the valve seat, so as to deliver a large flow rate. Moreover, the setting of the through hole and the connecting hole can make the opening of the valve plate more labor-saving and can play a role in pressure relief.

[0005] For further improvement, there are several connecting holes which are evenly distributed along the circumference of the sealing hole, so that the valve plate can be opened more easily.

[0006] To further improve, the outer side of the valve stem is provided with a sealing groove opened on the upper end of the valve cover, a packing is installed on the inner side of the sealing groove, the upper end of the packing is provided with a pressure ring installed on the inner side of the sealing groove, a pressure plate is installed on the upper end of the pressure ring, the left and right ends of the pressure plate are slidably connected with screws, the screws are threadedly connected to the valve cover, and the upper end of the pressure plate is provided with a locking nut threadedly connected to the outer side of the screw, so that the sealing effect between the valve stem and the valve cover is better.

[0007] For further improvement, a bracket is installed on the upper end of the valve cover, and guide strips are fixedly connected to the front and rear ends of the bracket. A fixed block is installed on the outer side of the valve stem, and a sliding groove is opened on the fixed block. The guide strip is slidably connected to the inner side of the sliding groove. The guide strip can guide the movement of the valve stem, so that the movement effect of the valve stem is better.

[0008] Further improvement, the fixed block can be detachably installed on the outside of the valve stem, a slot is opened on the outside of the valve stem, the fixed block is divided into two left and right fixed blocks, the fixed block is clamped on the inside of the slot, the left and right fixed blocks are connected by bolts, and the installation of the fixed block is more convenient.

[0009] To further improve, the bracket is provided with an installation groove at the upper end, a stem nut is installed on the inner side of the installation groove, the valve stem is threadedly connected to the inner side of the stem nut, a convex ring is arranged on the outer side of the stem nut, bearings are installed on both ends of the convex ring, the stem nut is rotatably connected to the inner side of the installation groove through the bearing, a positioning ring is threadedly connected to the upper end of the installation groove, the positioning ring is slidably connected to the outer side of the stem nut, a hexagonal block is arranged on the upper end of the stem nut, a handwheel is slidably connected to the outer side of the hexagonal block, a positioning nut threadedly connected to the outer side of the stem nut is arranged on the upper end of the handwheel, the handwheel drives the stem nut to rotate, and the stem nut drives the valve stem to move up and down, and the bearing makes the rotation effect of the stem nut better.

[0010] As a further improvement, a gasket is installed between the positioning nut and the handwheel, so that the positioning effect of the positioning nut is better.

[0011] For further improvement, a set screw is threadedly connected to the positioning nut, and the set screw is in contact with the gasket. The set screw can prevent the positioning nut and the gasket from rotating, thereby achieving a better positioning effect of the positioning nut.

[0012] For further improvement, an oil filling hole opened on the bracket is provided on the outer side of the mounting groove, a sealing head is threadedly connected to the inner side of the oil filling hole, and a certain gap is left between the bearing and the side wall of the mounting groove. When lubricating oil needs to be added, the sealing head is removed, and the lubricating oil enters the inner side of the mounting groove through the oil filling hole, and enters the inner side of the bearing through the gap between the bearing and the side wall of the mounting groove to lubricate the bearing, thereby making the bearing have better performance and longer service life.

[0013] The beneficial effect of the utility model is that when only a small water flow is needed, the valve stem is pulled upward, the valve stem drives the clamping block to move upward, and the clamping block drives the sealing block to move upward through the positioning block. Since there is a certain distance between the sealing block and the limit block, the sealing block moves upward so that the through hole is connected with the sealing hole. At this time, the valve plate has not separated from the valve seat, the sealing hole is connected with the connecting hole, the medium enters the sealing hole through the connecting hole, and enters the through hole through the sealing hole, so that the delivery of a small flow rate can be realized, the sealing block continues to move upward, so that the sealing block contacts the limit block and drives the limit block to move upward, and the limit block drives the valve plate to move up and away from the valve seat, so that a large flow rate can be delivered, and the arrangement of the through hole and the connecting hole can make the opening of the valve plate more labor-saving and can play a role in pressure relief. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 For this utility model Figure 2 The enlarged view of point A in the middle;

[0017] Figure 4For this utility model Figure 2 The enlarged view of point B in the middle;

[0018] Figure 5 For this utility model Figure 2 Enlarged view of point C in the middle;

[0019] Figure 6 This is a schematic diagram of the structure of the valve plate of the utility model;

[0020] Figure 7 This is a schematic diagram of the structure of the valve stem of the utility model;

[0021] Figure 8 It is a structural schematic diagram of the bracket of the utility model;

[0022] Fig. 9 It is a structural schematic diagram of the valve stem nut of the utility model.

[0023] Explanation of the accompanying drawings: 1. valve body; 11. valve seat; 2. valve plate; 21. through hole; 22. connecting hole; 23. sealing hole; 24. sealing block; 241. sliding hole; 242. positioning block; 25. limiting block; 3. valve stem; 31. slot; 32. fixing block; 321. sliding slot; 33. slot; 4. valve cover; 41. sealing groove; 42. packing; 43. pressure ring; 44. pressure plate; 45. screw; 451. locking nut; 5. bracket; 51. mounting groove; 52. valve stem nut; 521. convex ring; 522. hexagonal block; 53. bearing; 54. oil filling hole; 541. sealing head; 55. positioning ring; 56. handwheel; 57. positioning nut; 571. set screw; 58. gasket; 59. guide strip. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1-9 The utility model is further described as follows:

[0025] like Figure 1-Figure 3 and Figure 6-Figure 7As shown: In this embodiment, a lifting stop valve comprises a valve body 1, a valve seat 11 integrally formed with the valve body 1, a valve cover 4 detachably mounted on the upper end of the valve body 1, and a valve stem 3 located inside the valve body 1. The valve stem 3 extends upward through the valve cover 4. A valve plate 2 is mounted on the lower end of the valve stem 3. A through hole 21 is formed at the lower end of the valve plate 2. A sealing hole 23 is formed at the upper end of the through hole 21. A sealing block 24 is slidably connected to the inner side of the sealing hole 23. The sealing block 24 can seal the through hole 21. A connecting hole 22 is formed on the valve plate 2. The connecting hole 22 has Several of them are evenly distributed along the circumference of the sealing hole 23, the connecting hole 22 is connected to the sealing hole 23, a sliding hole 241 is opened at the upper end of the sealing block 24, a clamping block 33 is fixedly connected to the lower end of the valve stem 3, the clamping block 33 is slidably connected to the inner side of the sliding hole 241, a positioning block 242 threadedly connected to the sealing block 24 is provided at the upper end of the clamping block 33, a limit block 25 threadedly connected to the valve plate 2 is provided at the upper end of the sealing block 24, the valve stem 3 is slidably connected to the inner side of the limit block 25, and a certain distance is left between the limit block 25 and the sealing block 24.

[0026] like Figure 1-Figure 2 and Figure 4 As shown: a sealing groove 41 opened on the upper end of the valve cover 4 is provided on the outer side of the valve stem 3, a packing 42 is installed on the inner side of the sealing groove 41, a pressing ring 43 installed on the inner side of the sealing groove 41 is provided on the upper end of the packing 42, a pressing plate 44 is installed on the upper end of the pressing ring 43, screws 45 are slidably connected to the left and right ends of the pressing plate 44, the screws 45 are threadedly connected to the valve cover 4, and a locking nut 451 threadedly connected to the outer side of the screw 45 is provided on the upper end of the pressing plate 44.

[0027] like Figure 1-Figure 2 , Figure 5 and Figure 8-Figure 9As shown: a bracket 5 is installed on the upper end of the valve cover 4, and guide strips 59 are fixedly connected to the front and rear ends of the bracket 5. A slot 31 is opened on the outer side of the valve stem 3, and a fixing block 32 is clamped on the inner side of the slot 31. A slide groove 321 is opened on the fixing block 32, and the guide strip 59 is slidably connected to the inner side of the slide groove 321. A mounting groove 51 is opened on the upper end of the bracket 5, and a valve stem nut 52 is installed on the inner side of the mounting groove 51. The valve stem 3 is threadedly connected to the inner side of the valve stem nut 52. A convex ring 521 is arranged on the outer side of the valve stem nut 52, and bearings 53 are installed on the upper and lower ends of the convex ring 521. The valve stem nut 52 is rotatably connected to the inner side of the mounting groove 51 through the bearing 53. The outer side of the mounting groove 51 is provided with An oil filling hole 54 is opened on the bracket 5, and a sealing head 541 is threadedly connected to the inner side of the oil filling hole 54. A certain gap is left between the bearing 53 and the side wall of the mounting groove 51. A positioning ring 55 is threadedly connected to the upper end of the mounting groove 51. The positioning ring 55 is slidably connected to the outer side of the stem nut 52. A hexagonal block 522 is provided at the upper end of the stem nut 52. A handwheel 56 is slidably connected to the outer side of the hexagonal block 522. A positioning nut 57 threadedly connected to the outer side of the stem nut 52 is provided at the upper end of the handwheel 56. A gasket 58 is installed between the positioning nut 57 and the handwheel 56. A set screw 571 is threadedly connected to the positioning nut 57, and the set screw 571 contacts the gasket 58.

[0028] When the utility model is in use: when only a small water flow is needed, the valve stem 3 is pulled upward, and the valve stem 3 drives the clamping block 33 to move upward, and the clamping block 33 drives the sealing block 24 to move upward through the positioning block 242. Since there is a certain distance between the sealing block 24 and the limit block 25, the sealing block 24 moves upward so that the through hole 21 is connected with the sealing hole 23. At this time, the valve plate 2 does not separate from the valve seat 11, and the sealing hole 23 is connected with the connecting hole 22. The medium enters the sealing hole 23 through the connecting hole 22 and enters the through hole 21 through the sealing hole 23, so as to realize the delivery of a small flow rate. The sealing block 24 continues to move upward, so that the sealing block 24 contacts with the limit block 25 and drives the limit block 25 to move upward. The limit block 25 drives the valve plate 2 to move upward away from the valve seat 11, so as to deliver a large flow rate. Moreover, the arrangement of the through hole 21 and the connecting hole 22 can make the opening of the valve plate 2 more labor-saving and can play a role in pressure relief.

[0029] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A lift stop valve, comprising a valve body (1), a valve seat (11) integrally formed with the valve body (1), a valve cover (4) detachably mounted on the upper end of the valve body (1), and a valve stem (3) located inside the valve body (1), the valve stem (3) passing through the valve cover (4) and extending upward, and a valve plate (2) being mounted on the lower end of the valve stem (3), wherein: The valve plate (2) has a through hole (21) at the lower end, a sealing hole (23) at the upper end of the through hole (21), a sealing block (24) slidably connected to the inner side of the sealing hole (23), and the sealing block (24) can seal the through hole (21). The valve plate (2) has a connecting hole (22), the connecting hole (22) is connected to the sealing hole (23), a sliding hole (241) is formed at the upper end of the sealing block (24), a clamping block (33) is fixedly connected to the lower end of the valve stem (3), the clamping block (33) is slidably connected to the inner side of the sliding hole (241), a positioning block (242) threadedly connected to the sealing block (24) is provided at the upper end of the clamping block (33), a limiting block (25) threadedly connected to the valve plate (2) is provided at the upper end of the sealing block (24), the valve stem (3) is slidably connected to the inner side of the limiting block (25), and a certain distance is left between the limiting block (25) and the sealing block (24).

2. A lift stop valve according to claim 1, characterized in that: There are a plurality of connecting holes (22) which are evenly distributed along the circumference of the sealing hole (23).

3. A lift type stop valve according to claim 1, characterized in that: The outer side of the valve stem (3) is provided with a sealing groove (41) opened on the upper end of the valve cover (4), the inner side of the sealing groove (41) is installed with a packing (42), the upper end of the packing (42) is provided with a pressure ring (43) installed on the inner side of the sealing groove (41), the upper end of the pressure ring (43) is provided with a pressure plate (44), the left and right ends of the pressure plate (44) are slidably connected with a screw rod (45), the screw rod (45) is threadedly connected to the valve cover (4), and the upper end of the pressure plate (44) is provided with a locking nut (451) threadedly connected to the outer side of the screw rod (45).

4. The lift stop valve according to claim 1, characterized in that: A bracket (5) is installed at the upper end of the valve cover (4), and guide strips (59) are fixedly connected to the front and rear ends of the bracket (5). A fixed block (32) is installed on the outer side of the valve stem (3), and a sliding groove (321) is formed on the fixed block (32), and the guide strip (59) is slidably connected to the inner side of the sliding groove (321).

5. A lifting stop valve according to claim 4, characterized in that: The fixing block (32) is detachably mounted on the outside of the valve stem (3); a slot (31) is provided on the outside of the valve stem (3); the fixing block (32) is clamped on the inside of the slot (31); the fixing block (32) is divided into two left and right fixing blocks (32); and the left and right fixing blocks (32) are connected by bolts.

6. A lifting stop valve according to claim 5, characterized in that: The bracket (5) has a mounting groove (51) at the upper end thereof, a valve stem nut (52) is mounted inside the mounting groove (51), the valve stem (3) is threadedly connected to the inner side of the valve stem nut (52), a convex ring (521) is arranged outside the valve stem nut (52), bearings (53) are arranged at both upper and lower ends of the convex ring (521), the valve stem nut (52) is rotatably connected to the inner side of the mounting groove (51) via the bearing (53), a positioning ring (55) is threadedly connected to the upper end of the mounting groove (51), the positioning ring (55) is slidably connected to the outer side of the valve stem nut (52), a hexagonal block (522) is arranged at the upper end of the valve stem nut (52), a hand wheel (56) is slidably connected to the outer side of the hexagonal block (522), and a positioning nut (57) threadedly connected to the outer side of the valve stem nut (52) is arranged at the upper end of the hand wheel (56).

7. A lifting stop valve according to claim 6, characterized in that: A gasket (58) is installed between the positioning nut (57) and the hand wheel (56).

8. The lift type stop valve according to claim 7, characterized in that: The positioning nut (57) is threadedly connected with a set screw (571), and the set screw (571) is in contact with the gasket (58).

9. The lift type stop valve according to claim 6, characterized in that: An oil injection hole (54) opened on the bracket (5) is arranged outside the installation groove (51), a sealing head (541) is threadedly connected inside the oil injection hole (54), and a certain gap is left between the bearing (53) and the side wall of the installation groove (51).

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