High-strength stop valve

Abstract

The high-strength stop valve comprises a valve body, a valve cover, a valve rod, an actuator and a valve clack, an inlet flow channel and an outlet flow channel are arranged at the two ends of the valve body, an overflowing opening is formed in the valve body, the valve cover is installed at the upper end of the valve body, the valve rod penetrates through the valve cover and extends into the valve body, the actuator is in linkage connection with the outer end of the valve rod, and the inner end of the valve rod is connected with the valve clack. A valve seat used for being matched with the valve clack in a sealing mode is installed on the overflowing opening. The valve further comprises a conical reinforcing sleeve, the conical reinforcing sleeve is arranged on the periphery of the valve rod in a sleeving mode, the bottom of the conical reinforcing sleeve is connected with the upper end of the valve clack, a plurality of weight reduction grooves are evenly formed in the conical face of the conical reinforcing sleeve in the circumferential direction, and a reinforcing rib is formed between every two adjacent weight reduction grooves. By arranging the reinforcing structure, the strength of the valve rod is improved, so that the valve rod is not easy to bend under the condition of small diameter, the production cost is obviously reduced, the whole weight is lighter, the valve is convenient to assemble and carry, and the opening and closing operation of the valve is easier.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, in particular to a high strength stop valve. BACKGROUND

[0002] The stop valve is also called the cut-off valve, and belongs to the forced sealing type valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to be leakproof, when the medium enters the valve from below the valve disc, the resistance that the operating force needs to overcome is the friction of the valve stem and the packing and the thrust generated by the pressure of the medium, so the force for closing the valve is greater than the force for opening the valve, and therefore the diameter of the valve stem needs to be large, otherwise the valve stem will be bent. SUMMARY

[0003] The utility model discloses a high strength stop valve, the utility model discloses a reinforcing structure is set up, promotes the strength of valve stem, makes it not easy to bend under the condition of small diameter, not only significantly reduce the production cost, and make the overall weight lighter, benefit assembly, transport, and can make the opening and closing operation of valve more relaxed.

[0004] In order to achieve the above object, the utility model provides the following technical scheme: a high strength stop valve, including valve body, valve cover, valve stem, actuator and valve disc, the both ends of valve body are equipped with inlet flow channel and outlet flow channel, the position between the inlet flow channel and the outlet flow channel in the valve body is equipped with overflow port, the valve cover is installed on the upper end of valve body, the valve stem penetrates the valve cover and extends into the inside of valve body, the actuator is connected with the outer end of valve stem, the inner end of valve stem is connected with valve disc, the valve seat for forming sealing cooperation with valve disc is installed on the overflow port, further including conical reinforcing sleeve, the conical reinforcing sleeve is sleeved on the outer periphery of valve stem, and the bottom of conical reinforcing sleeve is connected with the upper end of valve disc, a plurality of lightening grooves are evenly arranged on the conical surface of conical reinforcing sleeve in the circumferential direction, and a reinforcing rib is formed between every two adjacent lightening grooves.

[0005] By adopting the above technical scheme, the conical reinforcing sleeve is arranged on the outer periphery of the valve stem, and the conical reinforcing sleeve is connected with the valve disc, the conical reinforcing sleeve is lightened by arranging the lightening grooves, so that the strength of the valve stem is enhanced without increasing the weight of the overall structure, the design makes it not easy to bend under the condition of small diameter, not only significantly reduces the production cost, but also makes the overall weight lighter, which is beneficial to assembly, transportation and opening and closing operation of the valve.

[0006] The utility model further sets up, still include a plurality of reinforcing plate, the valve stem outer periphery is circularly arrayed distribution a plurality of quantity with reinforcing plate is equivalent with the clamping slot, the inner periphery of conical reinforcing cover is provided with a plurality of with clamping slot corresponding guide groove, and the guide groove extends to conical reinforcing cover lower extreme, the reinforcing plate part is installed in the corresponding clamping slot with interference, the other part of reinforcing plate is embedded in the corresponding guide groove.

[0007] By adopting the above technical scheme, the contact area of the conical reinforcing cover and the valve stem can be improved, thereby improving the stability of the cooperation of the two.

[0008] The utility model further sets up, the upper end outside of reinforcing plate is equipped with the guide inclined plane.

[0009] By adopting the above technical scheme, the guide inclined plane is arranged on the upper end of the reinforcing plate, so that when the reinforcing plate cooperates with the guide groove of the conical reinforcing cover, the guide effect is achieved, the reinforcing plate can be more smoothly inserted into the guide groove, and the early assembly operation is facilitated.

[0010] The utility model further sets up, each weight reduction groove lower extreme all is provided with one for connecting together with valve clack of conical reinforcing cover internal hexagonal bolt.

[0011] By adopting the above technical scheme, the conical reinforcing cover is connected together with the valve clack through the internal hexagonal bolt, the installation structure is simple and reliable, and the disassembly is very convenient.

[0012] The utility model further sets up, the conical reinforcing cover corresponding the position of weight reduction groove lower extreme all is provided with for the screw head of internal hexagonal bolt is embedded completely with counterbore, and the counterbore outer end is installed with rubber plug with interference.

[0013] By adopting the above technical scheme, the internal hexagonal bolt can be protected, and the situation that the six hexagonal grooves of the internal hexagonal bolt are filled with impurities and are not conducive to disassembly in the later period can be avoided.

[0014] The utility model further sets up, the lower end center of conical reinforcing cover is equipped with upper groove, the upper end center of valve clack is equipped with with upper groove corresponding lower groove, upper groove and lower groove combination form a guide cavity, the inner end of valve rod is equipped with outwardly extending guide flange, the outer periphery of guide flange is inlaid with the inner periphery of guide cavity, and the thickness of guide flange is less than the depth of guide cavity, so that guide flange can move axially in guide cavity along with valve rod, the lower end of valve clack is equipped with with upper groove intercommunication's front section pressure relief hole, the side of valve clack is equipped with with upper groove intercommunication's rear section pressure relief hole, when guide flange lower end and lower end of lower groove meet, front section pressure relief hole and lower groove are blocked, when guide flange upper end and upper end of upper groove meet, front section pressure relief hole and lower groove are communicated.

[0015] By adopting the technical scheme, the valve rod and the valve disc can be relatively axially moved to realize the pre-pressure relief function, when the valve is closed, the valve disc first abuts against the valve seat, at this time, the inlet flow channel, the front section pressure relief hole, the guide cavity, the rear section pressure relief hole and the outlet flow channel are communicated due to the abutment of the guide flange on the valve rod and the upper groove of the conical reinforcing sleeve, then the valve rod is lowered to close the front section pressure relief hole to realize the complete closing of the valve, the structure makes the resistance smaller when the valve is closed and the operation more relaxed, when the valve is opened, the front section pressure relief hole is first opened to relieve pressure, then the valve disc is driven by the valve rod to be raised to be completely opened, which not only makes the opening more relaxed, but also prevents the water hammer phenomenon from occurring.

[0016] The utility model further sets up, the lower groove inner end is equipped with the sealing groove coaxial in front section pressure relief hole, the sealing groove is inlayed and is equipped with the sealing ring that is used to form sealed cooperation when abutting with valve rod inner end.

[0017] By adopting the technical scheme, the sealing performance when the valve rod abuts against the lower groove can be improved.

[0018] The utility model further sets up, the overflow port is equipped with the installation groove, the valve seat screw thread connection is with in the installation groove, the valve seat upper end is equipped with the limit flange that extends outward, the limit flanges and valve body inner wall are clamped and are equipped with the sealing pad.

[0019] By adopting the technical scheme, not only the connecting structure is simple and reliable, and dismounting is very convenient, but also the sealing reliability is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is the connecting structure schematic diagram of the utility model valve rod, valve disc and conical reinforcing sleeve;

[0022] Figure 3 It is the first visual angle structure schematic diagram of the utility model conical reinforcing sleeve;

[0023] Figure 4 It is the second visual angle structure schematic diagram of the utility model conical reinforcing sleeve.

[0024] In the diagram: 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Actuator; 5. Valve disc; 6. Inlet flow channel; 7. Outlet flow channel; 8. Flow port; 9. Valve seat; 10. Conical reinforcing sleeve; 11. Weight reduction groove; 12. Reinforcing rib; 13. Reinforcing plate; 14. Slot; 15. Guide groove; 16. Guide slope; 17. Hex socket head cap bolt; 18. Countersunk hole; 19. Rubber plug; 20. Upper groove; 21. Lower groove; 22. Guide cavity; 23. Guide flange; 24. Front pressure relief hole; 25. Rear pressure relief hole; 26. Sealing groove; 27. Sealing ring; 28. Mounting groove; 29. ​​Limiting flange; 30. Sealing gasket. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example: As attached Figures 1-4 The high-strength shut-off valve shown includes a valve body 1, a valve cover 2, a valve stem 3, an actuator 4, and a valve disc 5. The valve body 1 has an inlet flow channel 6 and an outlet flow channel 7 at both ends. A flow port 8 is provided inside the valve body 1 at the position between the inlet flow channel 6 and the outlet flow channel 7. The valve cover 2 is installed on the upper end of the valve body 1. The valve stem 3 extends through the valve cover 2 and into the interior of the valve body 1. The actuator 4 is linked to the outer end of the valve stem 3. The inner end of the valve stem 3 is connected to the valve disc 5. A valve seat 9 is installed on the flow port 8 to form a sealing fit with the valve disc 5. The shut-off valve also includes a conical reinforcing sleeve 10. The conical reinforcing sleeve 10 is sleeved on the outer periphery of the valve stem 3, and the bottom of the conical reinforcing sleeve 10 is connected to the upper end of the valve disc 5. Multiple weight-reducing grooves 11 are evenly arranged circumferentially on the conical surface of the conical reinforcing sleeve 10, and a reinforcing rib 12 is formed between every two adjacent weight-reducing grooves 11. The reinforcing rib 12 is triangular or trapezoidal in shape. By setting a tapered reinforcing sleeve 10 on the outer periphery of the valve stem 3, and connecting the tapered reinforcing sleeve 10 to the valve disc 5, the tapered reinforcing sleeve 10 reduces weight by setting a weight-reducing groove 11, so that while enhancing the strength of the valve stem 3, it does not significantly increase the weight of the overall structure. This design makes it less prone to bending in the case of small diameter, which not only significantly reduces production costs, but also makes the overall weight lighter, which is conducive to assembly and handling, and makes the opening and closing operation of the valve easier.

[0027] As attached Figures 2-4As shown, the stop valve further comprises a plurality of reinforcing plates 13, the valve rod 3 is circumferentially arranged with a plurality of clamping grooves 14 in the same number as the reinforcing plates 13, the inner periphery of the conical reinforcing sleeve 10 is provided with a plurality of guide grooves 15 corresponding to the clamping grooves 14, and the guide grooves 15 extend to the lower end of the conical reinforcing sleeve 10. The reinforcing plates 13 are partially installed in the corresponding clamping grooves 14, and the other part of the reinforcing plates 13 is embedded in the corresponding guide grooves 15, and the upper end of the guide groove 15 limits the reinforcing plate 13. This design can increase the contact area of the conical reinforcing sleeve 10 and the valve rod 3, thereby improving the stability of their cooperation.

[0028] As shown in the accompanying drawings Figure 2 As shown, the upper end of the reinforcing plate 13 is provided with a guide inclined surface 16. The guide inclined surface 16 is arranged at the upper end of the reinforcing plate 13, which plays a guiding role when the reinforcing plate 13 cooperates with the guide groove 15 of the conical reinforcing plate 13. The reinforcing plate 13 can be more smoothly inserted into the guide groove 15, which is beneficial to the early assembly operation.

[0029] As shown in the accompanying drawings Figure 2 As shown, the lower end of each weight-reducing groove 11 is provided with an inner hexagonal bolt 17 for connecting the conical reinforcing sleeve 10 and the valve disc 5 together. More specifically, the lower end of the weight-reducing groove 11 is provided with a through hole for the screw rod of the inner hexagonal bolt 17 to pass through, and the valve disc 5 is provided with a screw hole for the screw rod of the inner hexagonal bolt 17 to be screwed into. The screw hole does not penetrate the valve disc 5. The conical reinforcing sleeve 10 is connected together with the valve disc 5 through the inner hexagonal bolt 17. The installation structure is simple and reliable, and the disassembly is very convenient.

[0030] As shown in the accompanying drawings Figure 2 As shown, the conical reinforcing sleeve 10 is provided with a counterbore 18 corresponding to the position of the lower end of the weight-reducing groove 11 for completely embedding the screw head of the inner hexagonal bolt 17, and the outer end of the counterbore 18 is provided with a rubber plug 19. A limiting convex edge can be arranged at the upper end of the rubber plug 19 to facilitate the disassembly operation of the plug. This design can protect the inner hexagonal bolt 17 and avoid the accumulation of impurities in the hexagonal groove of the inner hexagonal bolt 17, which may cause difficulty in disassembly in the later stage.

[0031] As shown in the accompanying drawings Figures 2-4As shown, the lower end center of the conical reinforcing sleeve 10 is provided with an upper groove 20, the upper end center of the valve disc 5 is provided with a lower groove 21 corresponding to the upper groove 20, and the upper groove 20 and the lower groove 21 combine to form a guide cavity 22. The upper groove 20 and the lower groove 21 are circular grooves with the same inner diameter, and the guide cavity 22 is a cylindrical cavity. The inner end of the valve stem 3 is provided with a guide flange 23 extending outwardly around the circumference, the outer circumference of the guide flange 23 is in close contact with the inner circumference of the guide cavity 22, and the thickness of the guide flange 23 is smaller than the depth of the guide cavity 22, so that the guide flange 23 can move axially in the guide cavity 22 along with the valve stem 3. The lower end of the valve disc 5 is provided with a front section pressure relief hole 24 in communication with the upper groove 20, and the side of the valve disc 5 is provided with a rear section pressure relief hole 25 in communication with the upper groove 20. When the lower end of the guide flange 23 abuts against the inner end of the lower groove 21, the front section pressure relief hole 24 is blocked from the lower groove 21. When the upper end of the guide flange 23 abuts against the inner end of the upper groove 20, the front section pressure relief hole 24 is in communication with the lower groove 21. The valve stem 3 and the valve disc 5 can move axially relative to each other to achieve the function of pre-pressure relief. When the valve is closed, the valve disc 5 first abuts against the valve seat 9. At this time, the inlet flow passage 6, the front section pressure relief hole 24, the guide cavity 22, the rear section pressure relief hole 25, and the outlet flow passage 7 are in communication due to the abutment of the guide flange 23 on the valve stem 3 against the upper groove 20 of the conical reinforcing sleeve 10. Then the valve stem 3 is lowered to close the front section pressure relief hole 24, thereby achieving complete closure of the valve. This structure makes the resistance smaller when the valve is closed, and the operation more relaxed. When the valve is opened, the front section pressure relief hole 24 is first opened for pressure relief, and then the valve disc 5 is lifted by the valve stem 3 to be fully opened. Not only is the opening more relaxed, but also the water hammer phenomenon can be prevented.

[0032] As shown in the accompanying drawings, Figure 2 The inner end of the lower groove 21 is provided with a sealing groove 26 coaxial with the front section pressure relief hole 24, and the sealing groove 26 is embedded with a sealing ring 27 for sealing cooperation when the inner end of the valve stem 3 abuts against it. This design can improve the sealing performance when the valve stem 3 abuts against the lower groove 21, and prevent the medium in the inlet flow passage 6 from seeping into the outlet flow passage 7 when the valve is closed.

[0033] As shown in the accompanying drawings, Figure 1 The over-flow port 8 is provided with a mounting groove 28, and the valve seat 9 is threadedly connected in the mounting groove 28. That is, the outer circumference of the valve seat 9 has external threads, and the inner circumference of the mounting groove 28 has internal threads matching the external threads. The upper end of the valve seat 9 is provided with a limiting flange 29 extending outwardly, and a sealing gasket 30 is clamped between the limiting flange 29 and the inner wall of the valve body 1. The valve seat 9 not only has a simple and reliable connection structure, but also is very convenient to disassemble and assemble, and has reliable sealing performance.

Claims

1. A high-strength stop valve comprising a valve body (1), a valve cover (2), a valve stem (3), an actuator (4) and a valve disc (5), the valve body (1) being provided with an inlet flow channel (6) and an outlet flow channel (7) at both ends, a flow passage (8) being provided in the valve body (1) at a position corresponding to the space between the inlet flow channel (6) and the outlet flow channel (7), the valve cover (2) being mounted on the upper end of the valve body (1), the valve stem (3) extending through the valve cover (2) and into the interior of the valve body (1), the actuator (4) being connected to the outer end of the valve stem (3) in linkage, the inner end of the valve stem (3) being connected to the valve disc (5), and a valve seat (9) being mounted on the flow passage (8) for sealing cooperation with the valve disc (5); characterized in that: The application further comprises a conical reinforcing sleeve (10) which is sleeved on the outer periphery of the valve rod (3), and the bottom of the conical reinforcing sleeve (10) is connected with the upper end of the valve disc (5), and a plurality of lightening grooves (11) are uniformly arranged on the conical surface of the conical reinforcing sleeve (10) in the circumferential direction, and a reinforcing rib (12) is formed between every two adjacent lightening grooves (11).

2. A high-strength globe valve according to claim 1, characterized in that: The application further comprises a plurality of reinforcing plates (13), and the outer periphery of the valve rod (3) is circumferentially arranged with a plurality of clamping grooves (14) in a number corresponding to the reinforcing plates (13), and the inner periphery of the conical reinforcing sleeve (10) is provided with a plurality of guide grooves (15) corresponding to the clamping grooves (14), and the guide grooves (15) extend to the lower end of the conical reinforcing sleeve (10), and the reinforcing plates (13) are partially installed in the corresponding clamping grooves (14) in an interference fit, and the other part of the reinforcing plates (13) is embedded in the corresponding guide grooves (15).

3. A high-strength globe valve according to claim 2, characterized in that: The outer side of the upper end of the reinforcing plate (13) is provided with a guide inclined surface (16).

4. A high-strength globe valve according to claim 1, wherein: The lower end of each lightening groove (11) is provided with an inner hexagonal bolt (17) for connecting the conical reinforcing sleeve (10) with the valve disc (5).

5. A high-strength globe valve according to claim 4, wherein: The conical reinforcing sleeve (10) is provided with a counterbore (18) at the position corresponding to the lower end of the lightening groove (11) for completely embedding the screw head of the inner hexagonal bolt (17), and the outer end of the counterbore (18) is provided with a rubber plug (19) in an interference fit.

6. A high-strength globe valve according to claim 1, wherein: The lower end of the conical reinforcing sleeve (10) is provided with an upper groove (20) at the center, the upper end of the valve disc (5) is provided with a lower groove (21) corresponding to the upper groove (20), the upper groove (20) and the lower groove (21) combine to form a guide cavity (22), the inner end of the valve rod (3) is provided with a guide flange (23) extending outward, the outer periphery of the guide flange (23) is in close contact with the inner periphery of the guide cavity (22), and the thickness of the guide flange (23) is smaller than the depth of the guide cavity (22), so that the guide flange (23) can move axially in the guide cavity (22) along with the valve rod (3), the lower end of the valve disc (5) is provided with a front relief hole (24) in communication with the upper groove (20), and the side of the valve disc (5) is provided with a rear relief hole (25) in communication with the upper groove (20), when the lower end of the guide flange (23) abuts against the inner end of the lower groove (21), the front relief hole (24) is blocked from the lower groove (21), and when the upper end of the guide flange (23) abuts against the inner end of the upper groove (20), the front relief hole (24) is in communication with the lower groove (21).

7. A high-strength globe valve according to claim 6, characterized in that: The inner end of the lower groove (21) is provided with a sealing groove (26) coaxial with the front relief hole (24), and a sealing ring (27) is embedded in the sealing groove (26) for sealing cooperation when abutting against the inner end of the valve rod (3).

8. A high-strength globe valve according to claim 1, wherein: The overflow port (8) is provided with a mounting groove (28), the valve seat (9) is screwed into the mounting groove (28), the upper end of the valve seat (9) is provided with a limiting flange (29) extending outward, and the limiting flange (29) and the inner wall of the valve body (1) are clamped with a sealing gasket (30).

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