Stop valve and valve seat structure thereof

Abstract

The utility model discloses a stop valve and a valve seat structure thereof, and particularly relates to the technical field of stop valves, the stop valve comprises a valve body, a valve port is arranged in the valve body, a valve clack is arranged in the valve port, and an adjusting assembly used for adjusting the valve clack to perform closing adjustment is arranged outside the top end of the valve body; a limiting assembly used for enhancing stability is arranged outside the adjusting assembly. The limiting assembly comprises a fixing plate, and the fixing plate is arranged at the top of the valve body. The positioning column is pushed by the tension of the spring to move upwards and be embedded into the limiting groove in the movable ring, so that the valve rod connected with the movable ring can be fixed and limited, the situation that the valve rod drives the valve plate to move due to collision impact or mistaken touch is avoided, meanwhile, the limiting plate can also be rotated into the bottom end of the limiting hole, and the valve plate is prevented from being damaged. The positioning column is limited and fixed, the situation that the positioning column moves upwards to affect operation of the valve rod by workers is avoided, and therefore the closing stability and operation convenience of the valve body can be effectively guaranteed.

Description

Technical Field

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

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters of the conveying medium. Valves are control components in fluid conveying systems and have functions such as shutoff, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief. Shut-off valves are the most commonly used valves in pipeline systems and are often used to intercept media in pipeline systems.

[0003] As shown in the application document of the prior art publication number CN219954244U, it includes a valve body, a valve cover, a valve flap, and a valve stem. The valve body is provided with an inlet, an outlet, and a valve port. The lower part of the valve cover is connected to the upper part of the valve body. The valve cover is provided with a valve cover hole. The valve stem passes through the valve cover hole. A mounting sleeve is provided between the valve stem and the valve cover. The outer side of the mounting sleeve is interference-fitted with the inner side of the valve cover hole. The valve flap is connected to the lower end of the valve stem. Along the axial direction of the valve stem, the valve flap is two overlapping oblate spheres. At least one of the valve flap and the valve port is elastic. The valve flap and the valve port cooperate to seal. Since the valve flap is two overlapping oblate spheres, the spherical surface of the valve flap will be tangent to the inner wall of the valve port twice, and at least one of the valve flap and the valve port has good elasticity, so that the two have a good sealing effect when connected. The overlapping oblate sphere structure valve flaps form a double sealing effect to ensure that the fluid in the stop valve will not leak.

[0004] However, the handwheel in the above technical solution is prone to collision, impact or accidental touching, which may cause the valve stem to rotate, thereby affecting the closing stability of the valve body of the technical solution and even causing leakage. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a stop valve and its valve seat structure, in which the positioning column is pushed upward by the tension of the spring and embedded in the limiting groove in the movable ring, so that the valve stem connected to the movable ring can be fixed and limited to avoid collision, impact or accidental touch that causes the valve stem to drive the valve plate to move. At the same time, the limiting plate can also be rotated to the bottom end of the limiting hole to limit and fix the positioning column, and avoid the positioning column moving upward and affecting the staff's operation of the valve stem. The closing stability of the valve body and the convenience of operation can be effectively guaranteed to solve the problems arising from the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: a stop valve, comprising a valve body, a valve port is provided inside the valve body, a valve flap is provided inside the valve port, and an adjustment component for adjusting the valve flap for closing adjustment is provided outside the top end of the valve body;

[0007] A limiting component for enhancing stability is provided outside the adjusting component;

[0008] The limit assembly includes a fixing plate, the fixing plate is arranged on the top of the valve body, a fixing groove is provided on the top of one end of the fixing plate, a positioning column is provided inside the fixing groove, a positioning groove is provided at the bottom of the positioning column, and a spring is provided inside the positioning groove;

[0009] The fixing plate is provided with limiting holes on both the front and rear sides of one end close to the fixing slot, the limiting hole has an L-shaped cross section, a limiting plate is provided inside the limiting hole, and the limiting plate is installed on one side of the bottom end of the positioning column;

[0010] A movable ring is provided on the top of the fixing plate, a plurality of spaced limiting grooves are provided on the bottom of the movable ring, and the top end of the positioning column extends into one of the limiting grooves.

[0011] In a preferred embodiment, the adjusting assembly includes a mounting seat, which is arranged on the top of the valve body, and a valve stem is arranged on the top of the mounting seat, and the bottom end of the valve stem passes through the mounting seat and is fixed to the top of the valve disc; a threaded seat is sleeved on the outside of the valve stem, and the inner wall of the threaded seat is threadedly connected to the outside of the valve stem, and the threaded seat is installed on the top of the mounting seat; the movable ring and the fixed plate are both sleeved on the outside of the valve stem, and the inner wall of the movable ring is fixed to the outside of the valve stem, and the bottom end of the fixed plate is fixed to the top of the threaded seat. Through the threaded connection between the valve stem and the threaded seat, the staff can rotate the valve stem to drive the valve plate to move up and down, so that the valve plate can be separated or contacted with the valve port, thereby achieving the effect of closing and adjusting the valve body.

[0012] In a preferred embodiment, a handle is provided on the top of the movable ring, and the handle is installed on the outside of the top end of the valve stem. Through the connection between the handle and the valve stem, the staff can operate the handle to drive the valve stem to rotate, thereby improving the convenience of the staff in operating the valve stem.

[0013] In a preferred embodiment, a plurality of fastening bolts are provided on the top of the mounting seat, and the plurality of fastening bolts are evenly spaced apart. The bottom ends of the fastening bolts pass through the mounting seat and are fixed to the top of the valve body. By providing a plurality of fastening bolts, the mounting seat can be limited and fixed to ensure the stability of the mounting seat and the valve body during installation.

[0014] In a preferred embodiment, a fastening nut is connected to the external thread of the fastening bolt at the top end, and the inner wall of the fastening nut is connected to the external thread of the fastening bolt. The fastening nut is arranged at the top of the mounting seat. Through the threaded connection between the fastening nut and the fastening bolt, the top of the mounting seat can be limited to avoid the mounting seat from being separated from the valve body, thereby enhancing the connection stability between the mounting seat and the valve body.

[0015] The utility model also includes a valve seat structure, including a sealing ring, which is installed inside the valve port and sleeved on the outside of the valve disc. The outside of the valve disc contacts the inner wall of the sealing ring. By sleeved on the outside of the valve disc, the contact surface between the valve disc and the sealing ring can be made larger, and the sealing process can be effectively performed to avoid leakage.

[0016] Technical effects and advantages of the utility model:

[0017] The tension of the spring pushes the positioning column to move up and embed it into the limit groove in the movable ring, so that the valve stem connected to the movable ring can be fixed and limited to avoid collision, impact or accidental touch that causes the valve stem to drive the valve plate to move. At the same time, the limit plate can also be rotated to the bottom of the limit hole to limit and fix the positioning column, avoiding the positioning column from moving up and affecting the staff's operation of the valve stem, thereby effectively ensuring the closing stability of the valve body and the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the valve body of the utility model;

[0020] Figure 3 This is a front view of the mounting base of the utility model;

[0021] Figure 4 It is a cross-sectional view of the fixing plate of the utility model;

[0022] Figure 5 It is a side view of the fixing plate of the present utility model.

[0023] The accompanying drawings are marked as follows: 1. valve body; 2. valve port; 3. valve disc; 4. fixing plate; 5. fixing groove; 6. positioning column; 7. positioning groove; 8. spring; 9. limiting hole; 10. limiting plate; 11. movable ring; 12. mounting seat; 13. valve stem; 14. threaded seat; 15. handle; 16. fastening bolt; 17. fastening nut; 18. sealing ring; 19. limiting groove. DETAILED DESCRIPTION

[0024] 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.

[0025] Refer to the instruction manual Figure 1-5The utility model provides a stop valve and a valve seat structure thereof, comprising a valve body 1, a valve port 2 is provided inside the valve body 1, a valve flap 3 is provided inside the valve port 2, and an adjusting component for adjusting the valve flap 3 for closing is provided outside the top end of the valve body 1;

[0026] like Figure 1-3 As shown, the regulating assembly includes a mounting seat 12, the mounting seat 12 is arranged on the top of the valve body 1, a valve stem 13 is arranged on the top of the mounting seat 12, the bottom end of the valve stem 13 passes through the mounting seat 12 and is fixed to the top of the valve disc 3; a threaded seat 14 is sleeved on the outside of the valve stem 13, the inner wall of the threaded seat 14 is threadedly connected to the outside of the valve stem 13, and the threaded seat 14 is installed on the top of the mounting seat 12; the movable ring 11 and the fixed plate 4 are both sleeved on the outside of the valve stem 13, the inner wall of the movable ring 11 is fixed to the outside of the valve stem 13, and the fixed plate 4 is installed on the outside of the valve stem 13. The bottom end of the plate 4 is fixed together with the top of the threaded seat 14. Through the threaded connection between the valve stem 13 and the threaded seat 14, the staff can rotate the valve stem 13 to drive the valve plate to move up and down, so that the valve plate can be separated from or contacted with the valve port 2, thereby achieving the effect of closing and adjusting the valve body 1. A handle 15 is provided on the top of the movable ring 11, and the handle 15 is installed on the outside of the top end of the valve stem 13. Through the connection between the handle 15 and the valve stem 13, the staff can operate the handle 15 to drive the valve stem 13 to rotate, thereby improving the convenience of the staff in operating the valve stem 13.

[0027] In order to ensure the closing stability of the valve flap 3, a limit assembly for enhancing stability is provided outside the adjustment assembly;

[0028] like Figure 4 and 5 As shown, the limit assembly includes a fixed plate 4, which is arranged on the top of the valve body 1, and a fixing groove 5 is opened on the top of one end of the fixed plate 4, a positioning column 6 is arranged inside the fixed groove 5, a positioning groove 7 is opened at the bottom of the positioning column 6, and a spring 8 is arranged inside the positioning groove 7; the front and rear sides of one end of the fixed plate 4 close to the fixed groove 5 are provided with limit holes 9, the cross-section of the limit hole 9 is set to L-shaped, a limit plate 10 is arranged inside the limit hole 9, and the limit plate 10 is installed on one side of the bottom end of the positioning column 6; the top of the fixed plate 4 is provided with a movable ring 11, and the bottom of the movable ring 11 is provided with a plurality of spaced limit grooves 19, and the top of the positioning column 6 extends to one of the limit grooves 19 and the inside of the positioning groove 7.

[0029] like Figure 1 and 2As shown, a plurality of fastening bolts 16 are provided on the top of the mounting seat 12, and the plurality of fastening bolts 16 are evenly spaced apart, and the bottom ends of the fastening bolts 16 penetrate through the mounting seat 12 and are fixed to the top of the valve body 1. By providing a plurality of fastening bolts 16, the mounting seat 12 can be limited and fixed to ensure the stability of the mounting seat 12 and the valve body 1 during installation. A fastening nut 17 is threadedly connected to the top of the fastening bolt 16, and the inner wall of the fastening nut 17 is threadedly connected to the outer surface of the fastening bolt 16. The fastening nut 17 is provided at the top of the mounting seat 12. By threading the fastening nut 17 and the fastening bolt 16, the top of the mounting seat 12 can be limited to avoid the mounting seat 12 from being separated from the valve body 1, thereby enhancing the connection stability between the mounting seat 12 and the valve body 1.

[0030] The positioning column 6 is pushed upward by the tension of the spring 8 to be embedded in the limiting groove 19 in the movable ring 11, so that the valve stem 13 connected to the movable ring 11 can be fixed and limited, avoiding the situation where the valve stem 13 drives the valve plate to move due to collision, impact or accidental touch, thereby ensuring the closing stability of the valve body 1;

[0031] At the same time, with the help of the L-shaped limiting hole 9, the staff can rotate the positioning column 6 to embed the limiting plate 10 into the bottom end of the limiting hole 9, so as to limit and fix the positioning column 6 connected to the limiting plate 10, and avoid the positioning column 6 moving up and affecting the staff's normal operation of the valve stem 13.

[0032] Refer to the instruction manual Figure 2 The utility model provides a valve seat structure, including a sealing ring 18, wherein the sealing ring 18 is installed inside the valve port 2, and the sealing ring 18 is sleeved outside the valve disc 3, and the outside of the valve disc 3 contacts the inner wall of the sealing ring 18. By sleeved on the outside of the valve disc 3, the contact surface between the valve disc 3 and the sealing ring 18 can be made larger, and the sealing process can be effectively performed to avoid leakage.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A stop valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with a valve port (2) inside, the valve port (2) is provided with a valve flap (3) inside, and the top end of the valve body (1) is provided with an adjustment component for adjusting the valve flap (3) for closing adjustment; A limit assembly for enhancing stability is provided outside the adjustment assembly; The limit assembly comprises a fixing plate (4), the fixing plate (4) being arranged on the top of the valve body (1), a fixing groove (5) being provided at the top of one end of the fixing plate (4), a positioning column (6) being provided inside the fixing groove (5), a positioning groove (7) being provided at the bottom of the positioning column (6), and a spring (8) being provided inside the positioning groove (7); The fixing plate (4) is provided with limiting holes (9) on both the front and rear sides of one end close to the fixing groove (5); the limiting hole (9) has an L-shaped cross section; a limiting plate (10) is provided inside the limiting hole (9); and the limiting plate (10) is installed on one side of the bottom end of the positioning column (6); A movable ring (11) is provided on the top of the fixed plate (4), a plurality of spaced limiting grooves (19) are provided on the bottom of the movable ring (11), and the top end of the positioning column (6) extends into one of the limiting grooves (19).

2. A stop valve according to claim 1, characterized in that: The regulating assembly comprises a mounting seat (12), wherein the mounting seat (12) is arranged on the top of the valve body (1), a valve stem (13) is arranged on the top of the mounting seat (12), and the bottom end of the valve stem (13) passes through the mounting seat (12) and is fixed to the top of the valve disc (3); The valve stem (13) is externally sleeved with a threaded seat (14), the inner wall of the threaded seat (14) is threadably connected to the outer surface of the valve stem (13), and the threaded seat (14) is mounted on the top of the mounting seat (12); The movable ring (11) and the fixed plate (4) are both sleeved on the outside of the valve stem (13); the inner wall of the movable ring (11) is fixed to the outside of the valve stem (13); and the bottom end of the fixed plate (4) is fixed to the top of the threaded seat (14).

3. A stop valve according to claim 2, characterized in that: A handle (15) is provided on the top of the movable ring (11), and the handle (15) is installed outside the top end of the valve stem (13).

4. A stop valve according to claim 2, characterized in that: A plurality of fastening bolts (16) are arranged on the top of the mounting seat (12), and the plurality of fastening bolts (16) are evenly spaced and distributed. The bottom ends of the fastening bolts (16) penetrate the mounting seat (12) and are fixed to the top of the valve body (1).

5. A stop valve according to claim 4, characterized in that: The top end of the fastening bolt (16) is threadedly connected to a fastening nut (17), the inner wall of the fastening nut (17) is threadedly connected to the outer end of the fastening bolt (16), and the fastening nut (17) is arranged on the top of the mounting seat (12).

6. A valve seat structure installed in the stop valve according to any one of claims 1 to 5, characterized in that: It comprises a sealing ring (18), wherein the sealing ring (18) is installed inside the valve port (2), the sealing ring (18) is sleeved on the outside of the valve flap (3), and the outside of the valve flap (3) is in contact with the inner wall of the sealing ring (18).

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