Non-rising stem stop valve

Abstract

The utility model discloses a non-rising stem stop valve which comprises a valve body, the valve body is fixedly connected with a nut, the nut is provided with a valve rod in a penetrating mode, the end, located in the valve body, of the valve rod is connected with a valve clack, the valve body is provided with first padding in the circumferential direction of the valve rod, and a gland is arranged between the first padding and the nut. The side face, located in the valve body, of the valve rod is integrally connected with an arc-shaped limiting block. The utility model has the advantage of limiting the excessive movement of the valve rod.

Description

Technical Field

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

[0002] The non-rising stem stop valve is also called the non-rising stem wedge stop valve. The non-rising stem stop valve is widely used in petrochemical, chemical fiber textile, plastic papermaking, electric power steel, printing and dyeing rubber, natural gas and other gas transmission pipelines and industrial fluid control such as ethylene glycol. It has safe and reliable performance. The non-rising stem stop valve has manual, gear transmission, electric, pneumatic and other driving modes. However, when the existing non-rising stem stop valve is working, especially the manually adjusted non-rising stem stop valve, the circumference of the valve stem is not provided with a seal, and the valve stem is easily loosened with the valve disc due to excessive movement, so it needs to be improved. Utility Model Content

[0003] The utility model aims to provide a concealed stem stop valve to solve the problems raised in the above-mentioned background technology, and has the advantage of limiting excessive movement of the valve stem.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a concealed-stem stop valve, comprising a valve body, a nut fixedly connected to the valve body, a valve stem passing through the nut, a valve disc connected to one end of the valve stem inside the valve body, a first filler arranged on the circumference of the valve stem, a pressure cover arranged between the first filler and the nut, and an arc-shaped limit block integrally connected to the side of the valve stem inside the valve body.

[0005] By adopting the above technical solution, after the valve stem rotates, the valve stem is threadedly connected to the nut, so the valve stem will move along its own length direction, thereby driving the valve disc to move up and down. During this process, the limit block will move with the valve stem. When the limit block moves to the upper side of the interior of the valve body, the limit block will limit the continued movement of the valve stem, thereby limiting the excessive movement of the valve stem. Under the action of the pressure cover, the first filler will be restricted to the side of the valve stem.

[0006] As a further solution of the utility model: a sealing ring is provided on one side of the valve disc.

[0007] By adopting the above technical solution, the setting of the sealing ring allows one side of the valve disc to play a sealing role.

[0008] As a further solution of the utility model: the upper end of the valve stem is fixedly connected with a hand wheel, and one end of the hand wheel is provided with a groove.

[0009] By adopting the above technical solution, the valve stem is rotated by rotating the hand wheel, and the arrangement of the groove allows an external rod-shaped object to be inserted into the groove, thereby facilitating the rotation of the hand wheel.

[0010] As a further solution of the utility model: the valve body is provided with a receiving groove for receiving the first filler, and a spring located at the lower side of the first filler is installed in the receiving groove.

[0011] By adopting the above technical solution, a spring is arranged to squeeze the lower end of the first filler

[0012] As a further solution of the utility model: a first sealing plate and a second sealing plate are respectively provided on the side where the nut and the valve body face each other.

[0013] By adopting the above technical solution, the arrangement of the first sealing plate and the second sealing plate increases the sealing performance of both.

[0014] As a further solution of the utility model: an L-shaped plate is clamped between the valve stem and the valve disc.

[0015] By adopting the above technical solution, the L-shaped plate is used to realize the clamping connection between the valve stem and the valve disc, which facilitates the disassembly and connection of the two.

[0016] As a further solution of the utility model: the valve body is divided into an upper valve body and a lower valve body, and the upper valve body and the lower valve body are connected by bolts.

[0017] By adopting the above technical solution, a detachable connection between the upper valve body and the lower valve body is achieved by bolts.

[0018] As a further solution of the utility model: a protrusion is integrally connected to the interior of the valve disc, and one end of the valve stem located in the valve disc is provided with a groove recessed inwardly for accommodating the protrusion.

[0019] By adopting the above technical solution, the clamping fit between the protrusion and the clamping groove increases the connection strength between the valve disc and the valve stem.

[0020] As a further solution of the utility model: a second filler is arranged between the upper valve body and the lower valve body.

[0021] By adopting the above technical solution, the provision of the second filler increases the connection sealing between the upper valve body and the lower valve body.

[0022] As a further solution of the utility model: the side surface of the valve body is convex outward to form an arc.

[0023] By adopting the above technical solution, after the side surface of the valve body bulges outward, the capacity can be increased, thereby increasing the flow rate of the fluid in the valve body, and being more beautiful.

[0024] Compared with the prior art, the beneficial effects of the utility model are:

[0025] After the valve stem rotates, the valve stem is threadedly connected to the nut, so the valve stem will move along its own length, thereby driving the valve disc to move up and down. During this process, the limit block will move with the valve stem. When the limit block moves to the upper side of the interior of the valve body, the limit block will limit the continued movement of the valve stem, thereby limiting the excessive movement of the valve stem. Under the action of the pressure cover, the first packing will be restricted to the side of the valve stem. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment.

[0027] In the figure: 1. valve body; 2. sealing ring; 3. valve disc; 4. valve stem; 5. first stuffing; 6. upper valve body; 7. spring; 8. second stuffing; 9. gland; 10. nut; 11. hand wheel; 12. groove; 13. L-shaped plate; 14. protrusion; 15. slot; 16. first sealing plate; 17. second sealing plate; 18. limit block; 19. receiving groove; 20. lower valve body. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the embodiment of the utility model,

[0030] A non-rising stem stop valve, such as Figure 1 As shown, it includes a valve body 1, the valve body 1 is fixedly connected with a nut 10, the nut 10 is penetrated by a valve stem 4, one end of the valve stem 4 in the valve body 1 is connected with a valve disc 3, the valve body 1 is provided with a first stuffing 5 in the circumference of the valve stem 4, a pressure cover 9 is provided between the first stuffing 5 and the nut 10, and the side of the valve stem 4 in the valve body 1 is integrally connected with an arc-shaped limit block 18.

[0031] A sealing ring 2 is provided on one side of the valve flap 3 .

[0032] The upper end of the valve stem 4 is fixedly connected with a hand wheel 11 , and one end of the hand wheel 11 is provided with a groove 12 .

[0033] The valve body 1 is provided with a receiving groove 19 for receiving the first filler 5 , and a spring 7 located at the lower side of the first filler 5 is installed in the receiving groove 19 .

[0034] A first sealing plate 16 and a second sealing plate 17 are respectively provided on one side of the nut 10 and the valve body 1 facing each other.

[0035] An L-shaped plate 13 is clamped between the valve stem 4 and the valve disc 3 .

[0036] The valve body 1 is divided into an upper valve body 6 and a lower valve body 20 , and the upper valve body 6 and the lower valve body 20 are connected by bolts.

[0037] A protrusion 14 is integrally connected to the interior of the valve flap 3 , and a groove 15 recessed inwardly and used to accommodate the protrusion 14 is provided at one end of the valve stem 4 located inside the valve flap 3 .

[0038] A second filler 8 is disposed between the upper valve body 6 and the lower valve body 20 .

[0039] The side surface of the valve body 1 bulges outward to form an arc.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A concealed stem stop valve, comprising a valve body (1), characterized in that: The valve body (1) is fixedly connected to a nut (10), the nut (10) is penetrated by a valve stem (4), one end of the valve stem (4) inside the valve body (1) is connected to a valve flap (3), the valve body (1) is provided with a first stuffing (5) in the circumferential direction of the valve stem (4), a pressure cover (9) is provided between the first stuffing (5) and the nut (10), and the side of the valve stem (4) inside the valve body (1) is integrally connected to an arc-shaped limit block (18).

2. The concealed stem stop valve according to claim 1, characterized in that: A sealing ring (2) is provided on one side of the valve flap (3).

3. The concealed stem stop valve according to claim 1, characterized in that: The upper end of the valve stem (4) is fixedly connected to a hand wheel (11), and one end of the hand wheel (11) is provided with a groove (12).

4. The concealed stem stop valve according to claim 1, characterized in that: The valve body (1) is provided with a receiving groove (19) for receiving the first filler (5), and a spring (7) located at the lower side of the first filler (5) is installed in the receiving groove (19).

5. The concealed stem stop valve according to claim 1, characterized in that: A first sealing plate (16) and a second sealing plate (17) are respectively provided on the side where the nut (10) and the valve body (1) face each other.

6. The concealed stem stop valve according to claim 1, characterized in that: An L-shaped plate (13) is clamped between the valve stem (4) and the valve flap (3).

7. The concealed stem stop valve according to claim 1, characterized in that: The valve body (1) is divided into an upper valve body (6) and a lower valve body (20), and the upper valve body (6) and the lower valve body (20) are connected by bolts.

8. The concealed stem stop valve according to claim 1, characterized in that: The valve flap (3) is integrally connected with a protrusion (14) inside, and one end of the valve stem (4) located inside the valve flap (3) is provided with a groove (15) which is recessed inwards and used to accommodate the protrusion (14).

9. The concealed stem stop valve according to claim 7, characterized in that: A second filler (8) is provided between the upper valve body (6) and the lower valve body (20).

10. The concealed stem stop valve according to claim 1, characterized in that: The side surface of the valve body (1) bulges outwards to form an arc.

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