Angle stop valve

Abstract

The utility model discloses an angle stop valve which comprises a valve body, a flow-in channel is arranged at the lower end of the valve body, a flow-out channel is arranged in the middle of the valve body, a valve rod and a valve clack are arranged in the valve body, a through hole for the valve rod to penetrate through is formed in the top of the valve body, a hand wheel is arranged at the top of the valve rod, and a valve seat capable of being matched with the valve clack in a sealing mode is arranged in the valve body. A groove is formed in the upper portion of the valve body, padding is arranged in the groove, vertical connecting rods are arranged on the two sides of the top of the valve body, and external threads are arranged on the connecting rods. A material pressing block is arranged at the bottom of the valve cover, screw holes are formed in the two sides of the valve cover, the valve cover is in threaded connection with the connecting rod, the connecting rod is in threaded connection with a first threaded sleeve and a second threaded sleeve, the first threaded sleeve and the second threaded sleeve are located on the upper side and the lower side of the valve sleeve respectively, and the upper portion of the valve rod is in threaded connection with the valve cover. A boss is arranged on the side wall of the lower portion of the valve rod and provided with a sealing piece used for sealing the through hole.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an angle gate valve. Background Technology

[0002] Angle gate valves use a plug-shaped valve disc as their opening and closing element. The sealing surface is either flat or conical, and the valve disc moves linearly along the centerline of the fluid. The valve stem movement can be either a rising stem type (the valve stem rises and falls, but the handwheel does not) or a rising and rotating stem type (the handwheel and valve stem rotate and rise together, with the nut located on the valve body). Pipe gate valves are only suitable for fully open and fully closed operation and are not permitted for regulation or throttling.

[0003] In this type of gate valve, the valve stem and valve body cover are sealed only by packing. After long-term use, the sealing effect of the packing gradually weakens. Especially when the gate valve is open, under high pressure, water flow will enter the upper side of the valve disc, and the water flow may directly contact the packing, causing the packing to absorb water and need to be replaced. The existing gate valve has a complex structure, making it inconvenient to replace the packing. Utility Model Content

[0004] The purpose of this invention is to provide a diagonal shut-off valve to solve the problems mentioned in the background section.

[0005] To solve the above technical problems, this utility model adopts the following technical solution: an angle gate valve, including a valve body, with a flow inlet channel at the lower end and a flow outlet channel in the middle, a valve stem and a valve disc inside the valve body, a through hole for the valve stem to pass through at the top of the valve body, a handwheel at the top of the valve stem, a valve seat inside the valve body that can seal with the valve disc, a groove at the top of the valve body containing packing material, vertical connecting rods on both sides of the top of the valve body with external threads; also including a valve cover, with a pressure block at the bottom of the valve cover, threaded holes on both sides of the valve cover and threaded to the connecting rods, a first threaded sleeve and a second threaded sleeve threadedly connected to the connecting rods, the first threaded sleeve and the second threaded sleeve being located on the upper and lower sides of the valve cover respectively, the upper part of the valve stem threadedly connected to the valve cover, a boss on the lower side wall of the valve stem, and a sealing element for sealing the through hole on the boss.

[0006] Using the above technical solution, when the gate valve is opened, the valve stem moves upward, thereby causing the sealing element to move upward and seal the through hole. Under greater pressure, water will enter the upper side of the valve disc, thereby reducing the contact between the water flow through the through hole and the packing in the groove. If the packing needs to be replaced due to water absorption, the first and second threaded sleeves are rotated to move upward on the connecting rod, thereby causing the valve cover to move upward and opening the groove. At this time, the packing can be replaced. After replacing the packing, the first and second threaded sleeves are rotated to move downward on the connecting rod, causing the valve cover to move downward, thereby causing the boss to press against the packing.

[0007] As a further optimization of this utility model, the sealing element includes a bellows, the bottom of which is fixedly connected to the boss and the top of which is provided with a sealing ring.

[0008] Using the above technical solution, when the valve stem moves upward, it drives the bellows to move upward, thereby causing the sealing ring to be inserted into the gap between the valve stem and the through hole, so that the through hole is sealed. When the water flow impacts the bellows, the bellows is squeezed and deformed to firmly press the through hole, so that the through hole can be sealed more tightly.

[0009] As a further optimization of this utility model, a connecting frame is provided above the valve cover, the connecting frame is provided with a screw hole, and the valve stem is threadedly connected to the screw hole.

[0010] As a further optimization of this utility model, the thickness of the sealing ring is increased sequentially from top to bottom.

[0011] The beneficial effects of this utility model are as follows: When the gate valve is opened, the valve stem moves upward, thereby driving the sealing element to move upward and seal the through hole. Under greater pressure, water will enter the upper side of the valve disc, thereby reducing the contact between the water flow through the through hole and the packing in the groove. If the packing needs to be replaced due to water absorption, the first and second threaded sleeves are rotated to move upward on the connecting rod, thereby driving the valve cover to move upward and opening the groove. At this time, the packing can be replaced. After the packing is replaced, the first and second threaded sleeves are rotated to move downward on the connecting rod, driving the valve cover to move downward, thereby making the boss press against the packing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 for Figure 1 Enlarged view in the image.

[0014] The labels in the diagram mean the following: 1. Valve body; 11. Valve stem; 12. Valve disc; 13. Valve seat; 14. Handwheel; 15. Packing; 21. Inlet channel; 22. Outlet channel; 3. Connecting rod; 4. Valve cover; 41. Pressure block; 42. Connecting frame; 51. First threaded sleeve; 52. Second threaded sleeve; 6. Groove; 7. Boss; 8. Bellows; 81. Sealing ring. Detailed Implementation

[0015] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0016] See appendix Figure 1-2The present embodiment of this utility model further includes: an angle gate valve, comprising a valve body 1, with a flow inlet channel 21 at the lower end and a flow outlet channel 22 in the middle; a valve stem 11 and a valve disc 12 are provided inside the valve body 1; a through hole for the valve stem 11 to pass through is provided at the top of the valve body 1; a handwheel 14 is provided at the top of the valve stem 11; and a valve seat 13 capable of sealingly engaging with the valve disc 12 is provided inside the valve body 1.

[0017] The valve body 1 has a groove 6 on its upper part, and a packing 15 is provided in the groove 6. Vertical connecting rods 3 are provided on both sides of the top of the valve body 1, and the connecting rods 3 are provided with external threads. It also includes a valve cover 4, and a pressure block 41 is provided at the bottom of the valve cover 4. Threaded holes are opened on both sides of the valve cover 4 and are threaded to the connecting rods 3. A first threaded sleeve 51 and a second threaded sleeve 52 are threaded on the connecting rods 3. The first threaded sleeve 51 and the second threaded sleeve 52 are located on the upper and lower sides of the valve cover, respectively.

[0018] The valve stem 11 is threaded to the valve cover 4. Specifically, the valve cover 4 is provided with a connecting bracket 42 on the top, and the connecting bracket 42 is provided with a screw hole. The valve stem 11 is threaded to the screw hole.

[0019] The lower side wall of the valve stem 11 is provided with a boss 7. The boss 7 is provided with a sealing element for sealing the through hole. The sealing element includes a bellows 8. The bottom of the bellows 8 is fixedly connected to the boss 7, and the top is provided with a sealing ring 81. The thickness of the sealing ring 81 increases from top to bottom.

[0020] The principle of this utility model is as follows: when the shut-off valve is opened, the valve stem 11 moves upward, which drives the bellows 8 to move upward, thereby driving the sealing ring 81 to be inserted into the gap between the valve stem 11 and the through hole, so that the through hole is sealed.

[0021] Under high pressure, water will enter the upper side of valve disc 12. When the water flow impacts the bellows 8, the bellows 8 is squeezed and deformed to firmly press the through hole, so that the through hole can be sealed more tightly, thereby reducing the contact between the water flow and the packing 15 in the groove 6 after passing through the through hole.

[0022] If the packing 15 needs to be replaced due to water absorption, rotate the first threaded sleeve 51 and the second threaded sleeve 52 to move them up the connecting rod 3, thereby moving the valve cover 4 up and opening the groove 6. At this time, the packing 15 can be replaced. After replacing the packing 15, rotate the first threaded sleeve 51 and the second threaded sleeve 52 to move them down the connecting rod 3, thereby moving the valve cover 4 down and pressing the boss 7 against the packing 15.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An angle gate valve, comprising a valve body (1), wherein the lower end of the valve body (1) is provided with a flow inlet channel (21) and the middle part is provided with a flow outlet channel (22), the valve body (1) is provided with a valve stem (11) and a valve disc (12), the top of the valve body (1) is provided with a through hole for the valve stem (11) to pass through, the top of the valve stem (11) is provided with a handwheel (14), and the valve body (1) is provided with a valve seat (13) capable of sealingly engaging with the valve disc (12), characterized in that, The valve body (1) has a groove (6) on its upper part, and a packing (15) is provided in the groove (6). Vertical connecting rods (3) are provided on both sides of the top of the valve body (1), and the connecting rods (3) are provided with external threads. The valve body (1) also includes a valve cover (4), and a pressure block (41) is provided at the bottom of the valve cover (4). Threaded holes are provided on both sides of the valve cover (4) and threadedly connected to the connecting rods (3). A first threaded sleeve (51) and a second threaded sleeve (52) are threadedly connected to the connecting rods (3). The first threaded sleeve (51) and the second threaded sleeve (52) are located on the upper and lower sides of the valve cover, respectively. The valve stem (11) is threadedly connected to the valve cover (4) on its upper part. A boss (7) is provided on the lower side wall of the valve stem (11). A sealing element is provided on the boss (7). The sealing element can seal the through hole after it moves up.

2. The angle gate valve according to claim 1, characterized in that, The sealing element includes a bellows (8), the bottom of which is fixedly connected to the boss (7) and the top is provided with a sealing ring (81), which can be inserted into the gap between the valve stem (11) and the through hole.

3. The angle gate valve according to claim 1, characterized in that, A connecting frame (42) is provided above the valve cover (4), and the connecting frame (42) is provided with a screw hole, and the valve stem (11) is threadedly connected to the screw hole.

4. The angle stop valve according to claim 2, characterized in that, The thickness of the sealing ring (81) increases sequentially from top to bottom.

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