Rising stem gate valve thread protection device

Abstract

The utility model discloses a rising stem gate valve thread protection device, and relates to the technical field of rising stem gate valves, the rising stem gate valve thread protection device comprises a valve body, a gate plate, a valve cover and a valve rod, the valve rod is provided with a protection assembly used for protecting a gate valve thread, the protection assembly comprises a first protection sleeve arranged on the valve rod in a sleeving mode, and annular grooves are formed in the side walls, close to the two ends of the first protection sleeve, of the valve cover; through cooperative arrangement of the first protective sleeve, the annular grooves, the annular sealing blocks and other structures, during use, the first protective sleeve is arranged on the valve rod in a sleeving mode, the annular sealing blocks are inserted into the annular grooves correspondingly, then the pressing rod is pressed downwards, the pressing rod moves in the sliding grooves, the annular pressing blocks move downwards, and therefore the valve rod is sealed. The annular pressing block is squeezed into the annular sealing block, the annular sealing block expands to be tightly attached to the annular groove, the sealing effect is improved, sealing protection is conducted on the gate valve thread opening, and the problem that the sealing performance of the gate valve is affected due to the fact that the gate valve thread opening is exposed in the external environment and corroded is avoided as much as possible.

Description

Technical Field

[0001] The present application relates to the technical field of rising stem gate valves, and in particular to a thread protection device for rising stem gate valves. Background Art

[0002] Rising stem soft-sealed gate valve is an industrial valve. The opening and closing part of the soft-sealed gate valve is the gate. The movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces. The most commonly used mode is that the two sealing surfaces of the gate valve form a wedge shape. The wedge angle varies with the valve parameters. The soft-sealed gate valve is divided into two types: rising stem soft-sealed gate valve and non-rising stem soft-sealed gate valve.

[0003] Most of the threaded openings of existing rising stem gate valves are exposed to the external environment and thus corroded, which affects the sealing performance of the gate valve. Utility Model Content

[0004] The utility model aims to solve or at least alleviate the problem that a large portion of the threaded opening of the existing rising stem gate valve is corroded due to exposure to the external environment, thus affecting the sealing performance of the gate valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A threaded port protection device for a rising-stem gate valve comprises a valve body, a gate plate, a valve cover and a valve stem, wherein the valve stem is provided with a protection component for protecting the threaded port of the gate valve, and the characteristic is that the protection component comprises a first protection sleeve sleeved on the valve stem, the side walls of the valve cover close to both ends of the first protection sleeve are provided with annular grooves, both ends of the first protection sleeve are fixedly connected with annular sealing blocks, the annular sealing blocks are respectively plugged into the annular grooves, both ends of the first protection sleeve are provided with annular accommodating grooves connected with the interior of the annular sealing block, an annular pressure block is slidably arranged in the annular accommodating groove, both side walls of the upper and lower ends of the first protection sleeve are provided with sliding grooves connected with the annular accommodating groove, a pressure rod is slidably arranged in the sliding groove, one end of the pressure rod is fixedly connected with the annular pressure block, and the other end of the pressure rod extends to the outside of the first protection sleeve.

[0007] By adopting the above technical scheme, when in use, the first protective sleeve is set on the valve stem, the annular sealing blocks are inserted into the annular grooves respectively, and then the pressure rod is pressed down to move the pressure rod in the slide groove, the annular pressure block is moved downward, and the annular pressure block is squeezed into the annular sealing block, so that the annular sealing block expands and fits tightly with the annular groove, thereby improving the sealing effect, sealing and protecting the threaded port of the gate valve, and avoiding as much as possible exposure to the external environment and corrosion, which leads to problems affecting the sealing of the gate valve.

[0008] Optionally, the gate plate is located inside the valve body, the valve cover is fixedly connected to the upper surface of the valve body, a rotating disc is rotatably connected to the top end of the valve cover, the upper part of the gate plate is fixedly connected to the valve stem, and one end of the valve stem away from the gate plate penetrates through the valve cover and the rotating disc and is threadedly connected to the rotating disc.

[0009] By adopting the above technical solutions, the valve stem is lifted and lowered by rotating the rotating disc, and the gate plate is moved into the valve cover or the valve body to open or close the valve body.

[0010] Optionally, nuts are threadedly connected to the ends of the pressure rods away from the annular pressing blocks.

[0011] By adopting the above technical solutions, by rotating the nuts, the nuts are abutted against the first protective sleeve, so that the pressure rods can be fixed, and it is prevented that the annular pressing plate moves away from the annular sealing block during use.

[0012] Optionally, an elastic rubber sleeve is fixedly connected to the inner wall of the first protective sleeve, and the rubber sleeve is sleeved on the valve stem.

[0013] By adopting the above technical solutions, the rubber sleeve can effectively absorb the vibration and impact generated during the operation of the gate valve, thereby improving the stability and safety of the use of the gate valve.

[0014] Optionally, a plurality of vertically arranged reinforcing ribs are fixedly connected to the outer wall of the first protective sleeve, and the reinforcing ribs are equally spaced.

[0015] By adopting the above technical solutions, the structural strength of the first protective sleeve can be improved through the reinforcing ribs, and the service life of the first protective sleeve can be effectively extended.

[0016] Optionally, a second protective sleeve is threadedly connected to the upper surface of the rotating disc, one end of the valve stem extending out of the upper surface of the rotating disc is located in the second protective sleeve, and the second protective sleeve is made of a transparent material and the top end is sealed.

[0017] By adopting the above technical solutions, the valve stem extending out of the rotating disc can be protected by the second protective sleeve to prevent sundries from entering the connection between the rotating disc and the valve stem. At the same time, the movement of the valve stem can be seen through the transparent second protective sleeve, which is convenient for judging whether the gate valve is opened.

[0018] Optionally, the height of the inner wall of the second protective sleeve is the same as the height of the top of the movement of the valve stem.

[0019] By adopting the above technical solutions, it is prevented that when the top end of the valve stem contacts the second protective sleeve, the gate plate is not completely moved into the valve cover, resulting in the valve body not being completely opened.

[0020] Optionally, one end of the pressure rod away from the annular pressure block is fixedly connected to a limiting disk.

[0021] By adopting the above technical solution, the nut can be prevented from falling and being lost by the limiting plate.

[0022] In summary, the beneficial effects of this application are as follows:

[0023] 1. The present application adopts the coordination arrangement between the first protective sleeve, the annular groove and the annular sealing block. When in use, the first protective sleeve is placed on the valve stem, and the annular sealing blocks are respectively inserted into the annular grooves. Then, the pressure rod is pressed down to move the pressure rod in the slide groove, and the annular pressure block is moved down to squeeze the annular pressure block into the annular sealing block, so that the annular sealing block expands and fits tightly with the annular groove, thereby improving the sealing effect, sealing and protecting the threaded port of the gate valve, and avoiding the problem of being exposed to the external environment and being corroded, which may affect the sealing performance of the gate valve.

[0024] 2. The structural strength of the first protective cover can be improved by reinforcing the ribs, thereby effectively extending the service life of the first protective cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 This is a schematic diagram of the first protective cover structure of the utility model;

[0027] Figure 3 For the utility model Figure 1 Schematic diagram of the enlarged structure of area A in the middle.

[0028] Explanation of the accompanying drawings: 1. valve body; 2. gate; 3. valve cover; 4. valve stem; 5. first protective cover; 6. annular groove; 7. annular sealing block; 8. annular receiving groove; 9. annular pressure block; 10. slide groove; 11. pressure rod; 12. rotating disk; 13. nut; 14. rubber sleeve; 15. reinforcing rib; 16. second protective cover; 17. limit disk. DETAILED DESCRIPTION

[0029] The following is combined with Figures 1-3 This application is described in further detail.

[0030] See also Figures 1-3A rising stem gate valve thread protection device comprises a valve body 1, a gate plate 2, a valve cover 3 and a valve stem 4. The gate plate 2 is used to seal the valve body 1, the valve cover 3 is used to store the gate plate 2, and the valve stem 4 is used to drive the gate plate 2 to move. The valve stem 4 is provided with a protection component for protecting the gate valve thread. The protection component comprises a first protective sleeve 5 sleeved on the valve stem 4. The inner wall of the first protective sleeve 5 is coated with an anti-corrosion coating to enhance the protection effect of the gate valve thread and prevent corrosion. The first protective sleeve 5 is made of corrosion-resistant material to improve the durability of the first protective sleeve 5. The side walls of the valve cover 3 near both ends of the first protective sleeve 5 are provided with annular grooves 6. The first protective sleeve 5 is fixed at both ends. An annular sealing block 7 is fixedly connected and plugged into the annular groove 6, which is used to seal the two ends of the first protective sleeve 5 with the two ends of the valve cover 3 and isolate the threaded opening. An annular accommodating groove 8 connected to the inside of the annular sealing block 7 is provided at both ends of the first protective sleeve 5. An annular pressure block 9 for squeezing the annular sealing block 7 to expand it is slidably arranged in the annular accommodating groove 8. Slide grooves 10 connected to the annular accommodating groove 8 are provided on both side walls at the upper and lower ends of the first protective sleeve 5. A pressure rod 11 for moving the annular pressure block 9 is slidably arranged in the slide groove 10. One end of the pressure rod 11 is fixedly connected to the annular pressure block 9, and the other end of the pressure rod 11 extends to the outside of the first protective sleeve 5.

[0031] When in use, the first protective sleeve 5 is sleeved on the valve stem 4, and the annular sealing blocks 7 are respectively inserted into the annular grooves 6, and then the pressure rod 11 is pressed down to move the pressure rod 11 in the slide groove 10, and the annular pressure block 9 is moved down to squeeze the annular pressure block 9 into the annular sealing block 7, so that the annular sealing block 7 expands and fits tightly with the annular groove 6, thereby improving the sealing effect, sealing and protecting the threaded port of the gate valve, and avoiding corrosion caused by exposure to the external environment as much as possible, which may affect the sealing performance of the gate valve.

[0032] Reference Figure 2 The gate plate 2 is located inside the valve body 1, and the valve cover 3 is fixedly connected to the upper surface of the valve body 1. The top of the valve cover 3 is rotatably connected to a rotating disk 12. The top of the gate plate 2 is fixedly connected to the valve stem 4. The end of the valve stem 4 away from the gate plate 2 passes through the valve cover 3 and the rotating disk 12 and is threadedly connected to the rotating disk 12. The valve stem 4 is located inside the valve cover 3 and is divided into a bare rod shape. The part of the valve stem 4 extending out of the valve cover 3 is threaded. The valve stem 4 is raised and lowered by rotating the rotating disk 12, and the gate plate 2 is moved into the valve cover 3 or the valve body 1 to open or close the valve body 1.

[0033] Reference Figure 2 The end of the pressure rod 11 away from the annular pressure block 9 is threadedly connected with a nut 13. By rotating the nut 13 to make the nut 13 abut against the first protective sleeve 5, the pressure rod 11 can be fixed to prevent the annular pressure block 9 from moving and separating from the annular sealing block 7 during use.

[0034] Reference Figure 2The inner wall of the first protective sleeve 5 is fixedly connected with an elastic rubber sleeve 14, which is sleeved on the valve stem 4. The rubber sleeve 14 can effectively absorb the vibration and impact generated during the operation of the gate valve, thereby improving the stability and safety of the gate valve.

[0035] Reference Figure 2 The outer wall of the first protective cover 5 is fixedly connected with a plurality of vertically arranged reinforcing ribs 15, and the reinforcing ribs 15 are evenly distributed. The reinforcing ribs 15 can improve the structural strength of the first protective cover 5 and effectively extend the service life of the first protective cover 5.

[0036] Reference Figure 1 A second protective cover 16 is threadedly connected to the upper surface of the rotating disk 12, and one end of the valve stem 4 extending out of the upper surface of the rotating disk 12 is located in the second protective cover 16. The second protective cover 16 is made of transparent material and is sealed at the top. The second protective cover 16 can protect the valve stem 4 extending out of the rotating disk 12 to prevent debris from entering the connection between the rotating disk 12 and the valve stem 4. At the same time, the movement of the valve stem 4 can be seen through the second protective cover 16 made of transparent material, which is convenient for judging whether the gate valve is open.

[0037] Reference Figure 1 The height of the inner wall of the second protective sleeve 16 is the same as the height of the moving top of the valve stem 4, so as to prevent the gate plate 2 from not being completely moved into the valve cover 3 when the top of the valve stem 4 contacts the second protective sleeve 16, resulting in the valve body 1 being unable to be fully opened.

[0038] Reference Figure 2 One end of the pressure rod 11 away from the annular pressure block 9 is fixedly connected to a limiting plate 17, and the limiting plate 17 can prevent the nut 13 from falling and being lost.

[0039] The implementation principle of the present application is as follows: when in use, the first protective sleeve 5 is sleeved on the valve stem 4, so that the annular sealing blocks 7 are respectively inserted into the annular grooves 6, and then the pressure rod 11 is pressed down to move the pressure rod 11 in the slide groove 10, and the annular pressure block 9 is moved downward to squeeze the annular pressure block 9 into the annular sealing block 7, so that the annular sealing block 7 expands and fits tightly with the annular groove 6, thereby improving the sealing effect, sealing and protecting the threaded port of the gate valve, and avoiding exposure to the external environment and corrosion as much as possible, which may affect the sealing performance of the gate valve.

[0040] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rising stem gate valve thread protection device, comprising a valve body (1), a gate plate (2), a valve cover (3) and a valve stem (4), wherein the valve stem (4) is provided with a protection component for protecting the thread of the gate valve, characterized in that: The protection assembly comprises a first protection sleeve (5) sleeved on the valve stem (4); the side walls of the valve cover (3) close to both ends of the first protection sleeve (5) are provided with annular grooves (6); both ends of the first protection sleeve (5) are fixedly connected with annular sealing blocks (7); the annular sealing blocks (7) are respectively plugged into the annular grooves (6); both ends of the first protection sleeve (5) are provided with annular receiving grooves (8) connected to the inside of the annular sealing block (7); an annular pressure block (9) is slidably arranged in the annular receiving groove (8); both side walls of the upper and lower ends of the first protection sleeve (5) are provided with sliding grooves (10) connected to the annular receiving groove (8); a pressure rod (11) is slidably arranged in the sliding groove (10); one end of the pressure rod (11) is fixedly connected to the annular pressure block (9); the other end of the pressure rod (11) extends to the outside of the first protection sleeve (5).

2. A rising stem gate valve thread protection device according to claim 1, characterized in that: The gate plate (2) is located inside the valve body (1), the valve cover (3) is fixedly connected to the upper surface of the valve body (1), the top of the valve cover (3) is rotatably connected to a rotating disk (12), the top of the gate plate (2) is fixedly connected to the valve stem (4), and the end of the valve stem (4) away from the gate plate (2) passes through the valve cover (3) and the rotating disk (12) and is threadedly connected to the rotating disk (12).

3. A rising stem gate valve thread protection device according to claim 2, characterized in that: One end of the pressure rod (11) away from the annular pressure block (9) is threadedly connected with a nut (13).

4. A rising stem gate valve thread protection device according to claim 3, characterized in that: An elastic rubber sleeve (14) is fixedly connected to the inner wall of the first protective sleeve (5), and the rubber sleeve (14) is sleeved on the valve stem (4).

5. A rising stem gate valve thread protection device according to claim 4, characterized in that: The outer wall of the first protective sleeve (5) is fixedly connected to a plurality of vertically arranged reinforcing ribs (15), and the reinforcing ribs (15) are equidistantly distributed.

6. A rising stem gate valve thread protection device according to claim 5, characterized in that: A second protective sleeve (16) is threadedly connected to the upper surface of the rotating disk (12); one end of the valve stem (4) extending out of the upper surface of the rotating disk (12) is located in the second protective sleeve (16); the second protective sleeve (16) is made of transparent material and has a sealed top end.

7. A rising stem gate valve thread protection device according to claim 6, characterized in that: The height of the inner wall of the second protective sleeve (16) is the same as the height of the moving top of the valve stem (4).

8. A rising stem gate valve thread protection device according to claim 7, characterized in that: One end of the pressure rod (11) away from the annular pressure block (9) is fixedly connected to a limiting plate (17).

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