High-temperature and high-pressure dual-purpose valve

Abstract

The utility model discloses a high temperature high pressure dual -purpose valve concretely relates to valve technical field, including valve body, two valve seats and a gate assembly are equipped in the valve body, the gate assembly includes gate body, gate frame and two gate guide blocks, is connected through fixed pin shaft between the gate body and gate frame, is connected through the interior hexagon screw between the gate frame and two gate guide blocks, the valve body is equipped with the valve clack in the inside, the rocker frame is fixed and arranged in the valve body inside, the rocker is connected on the valve clack, is connected through the pin shaft between the rocker top and rocker frame. The utility model discloses the structure assembly of gate valve and check valve together, can play the function of check valve preventing medium backflow when the valve is fully opened, can play the function of wedge gate valve bidirectional cut -off when the valve is fully closed, saves installation weight and cost, reduces the leakage point of internal leakage and external leakage, and increases the sealing reliability.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically to a high-temperature and high-pressure dual-purpose valve. Background Technology

[0002] A valve is a device used in fluid systems to control the direction, pressure, and flow rate of a fluid. It allows the medium (liquid, gas, powder) within piping and equipment to flow or stop and controls its flow rate. A high-temperature, high-pressure valve is an automatic pressure relief or control device used in high-temperature, high-pressure environments. It is typically an important safety accessory for pressure vessels or used to control the flow of media within pipelines. Its main functions include automatically opening when the internal pressure of the container exceeds a preset value, rapidly releasing a certain amount of media to reduce the pressure within the container to a safe range; it can also be used to cut off or connect media under high-temperature, high-pressure conditions, and to regulate the flow rate and pressure of the media.

[0003] For example, a high-temperature and high-pressure resistant valve with prior art publication number CN222102769U increases the pressure-bearing area of ​​the regulating valve by setting an arc surface, and realizes the detachable operation of the handwheel through connecting column, fixing block and sleeve, so as to prevent the valve from being opened by people when it is installed outdoors, which would lead to danger and loss.

[0004] However, the existing technology described above still has the following problems in use: traditional high-temperature and high-pressure valves, gate valves and check valves are installed together, which increases the installation weight and cost, and also increases the probability of external and internal leakage. Based on this, this utility model provides a high-temperature and high-pressure dual-purpose valve. Utility Model Content

[0005] To overcome the aforementioned deficiencies in the prior art, this utility model provides a high-temperature and high-pressure dual-purpose valve, which is assembled with the structure of a gate valve and a check valve. When the valve is fully open, it can act as a check valve to prevent backflow of the medium, and when the valve is fully closed, it can act as a wedge gate valve to cut off the flow in both directions. This saves on installation weight and cost, reduces internal and external leakage points, and increases sealing reliability, thereby solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature and high-pressure dual-purpose valve, comprising a valve body, wherein the valve body is provided with two valve seats and a gate assembly, the gate assembly includes a gate body, a gate frame and two gate guide blocks, the gate body and the gate frame are connected by a fixed pin, the gate frame and the two gate guide blocks are connected by hexagonal socket screws, the valve body is provided with a valve disc, a rocker arm frame is fixedly provided inside the valve body, a rocker arm is connected to the valve disc, the top end of the rocker arm is connected to the rocker arm frame by a pin, a valve stem is connected to the top of the gate frame, and the top end of the valve stem passes through the top of the valve body and extends out of the outside of the valve body.

[0007] In a preferred embodiment, the top of the rocker arm is provided with a clamping nut, which is fixed inside the valve body and sleeved on the outside of the valve stem. The valve disc and the rocker arm are fixed together by a locking nut.

[0008] In a preferred embodiment, the valve body is provided with a bracket on top, and the bracket is detachably fixed to the valve body by a plurality of bracket bolts and a plurality of bracket nuts, which is used to improve the connection between the bracket and the valve body.

[0009] In a preferred embodiment, a valve cover is inserted through the center of the bottom of the bracket, and the bottom of the valve cover is located inside the valve body. The valve cover and the bracket are detachably fixed together by valve cover bolts and valve cover nuts.

[0010] In a preferred embodiment, packing is provided between the valve cover and the valve stem, a packing sleeve is provided on the top of the packing, and a packing pressure plate is provided on the top of the packing sleeve. The packing, the packing sleeve, and the packing pressure plate are all fitted on the outside of the valve stem. The packing pressure plate and the bracket are detachably fixed together by packing pressure plate bolts and packing pressure plate nuts. A butterfly spring is provided between the bottom of the packing pressure plate nut and the packing pressure plate. The packing can improve the sealing between the valve cover and the valve body.

[0011] In a preferred embodiment, a sealing ring, a sealing ring gasket, and a four-open ring are provided between the valve cover and the valve body from bottom to top to further improve the sealing performance between the valve cover and the valve body.

[0012] In a preferred embodiment, the valve stem and the bracket are detachably connected by a valve stem nut, and a bevel gear is fixedly provided on the top of the bracket.

[0013] The technical effects and advantages of this utility model are as follows:

[0014] 1. This utility model combines the structures of a gate valve and a check valve, which can act as a check valve to prevent backflow of the medium when the valve is fully open, and also act as a wedge gate valve to cut off the flow in both directions when the valve is fully closed. This saves on installation weight and cost, reduces internal and external leakage points, and increases sealing reliability.

[0015] 2. By rotating the bevel gear, the valve stem nut is driven to move the valve stem up and down. The valve stem drives the gate assembly to open and close the valve. Through the up and down movement of the valve stem, when fully open, it acts as a check valve to prevent backflow of the medium. When fully closed, it acts as a wedge gate valve to cut off the medium, thus realizing the dual function of one valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the valve closure according to this utility model;

[0018] Figure 3 This is a schematic diagram of the valve opening according to this utility model;

[0019] Figure 4 This is a partial structural cross-sectional view of the present invention;

[0020] Figure 5 This is a schematic diagram of the gate assembly structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the valve disc and rocker arm of this utility model.

[0022] The attached figures are labeled as follows: 1. Valve body; 2. Valve seat; 3. Gate assembly; 4. Valve disc; 5. Rocker arm holder; 6. Rocker arm; 7. Pin; 8. Valve stem; 9. Compression nut; 10. Bracket; 11. Bracket bolt; 12. Bracket nut; 13. Valve cover; 14. Valve cover bolt; 15. Valve cover nut; 16. Packing; 17. Packing sleeve; 18. Packing pressure plate; 19. Packing pressure plate bolt; 20. Packing pressure plate nut; 21. Butterfly spring; 22. Sealing ring; 23. Sealing ring gasket; 24. Four-way open ring; 25. Valve stem nut; 26. Bevel gear; 27. Locking nut;

[0023] 31. Gate body; 32. Gate frame; 33. Gate guide block; 34. Fixing pin; 35. Socket head screw. Detailed Implementation

[0024] 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.

[0025] Refer to the instruction manual appendix Figures 1-6 This utility model provides a high temperature and high pressure dual-purpose valve, including a valve body 1. The valve body 1 is provided with two valve seats 2 and a gate assembly 3. The gate assembly 3 includes a gate body 31, a gate frame 32 and two gate guide blocks 33. The gate body 31 and the gate frame 32 are connected by a fixing pin 34, and the gate frame 32 and the two gate guide blocks 33 are connected by internal hexagon screws 35.

[0026] The valve body 1 is provided with a valve disc 4 inside, and a rocker arm frame 5 is fixedly provided inside the valve body 1. A rocker arm 6 is connected to the valve disc 4. The valve disc 4 and the rocker arm 6 are fixed together by a locking nut 27. The top of the rocker arm 6 is connected to the rocker arm frame 5 by a pin 7. The top of the gate frame 32 is connected to a valve stem 8. The top of the valve stem 8 passes through the top of the valve body 1 and extends out of the outside of the valve body 1. The top of the rocker arm frame 5 is provided with a clamping nut 9. The clamping nut 9 is fixed inside the valve body 1 and is sleeved on the outside of the valve stem 8.

[0027] The valve body 1 is provided with a bracket 10 on the top. The bracket 10 and the valve body 1 are detachably fixed together by a plurality of bracket bolts 11 and a plurality of bracket nuts 12. A valve cover 13 is passed through the center of the bottom of the bracket 10, and the bottom of the valve cover 13 is located inside the valve body 1. The valve cover 13 and the bracket 10 are detachably fixed together by a valve cover bolt 14 and a valve cover nut 15.

[0028] The valve stem 8 and the bracket 10 are detachably connected by a valve stem nut 25, and a bevel gear 26 is fixedly provided on the top of the bracket 10.

[0029] In actual use, two valve seats 2 are installed at the flow channel hole of valve body 1. The sealing planes of the two valve seats 2 are at an angle to the left and right symmetrical planes of the valve. A swing check valve disc 4 is installed at the inlet. The disc 4 is connected to the rocker arm 6 and is pressed by the lock nut 27. The other end of the rocker arm 6 is connected to the rocker arm holder 5 by the pin 7, so that the rocker arm 6, valve disc 4 and other components can rotate along the axis of the pin 7. In forward flow, the medium thrust pushes the valve disc 4 to rotate upward, and the valve opens (e.g., Figure 2As shown), when the valve is fully open, its function is equivalent to a check valve. The gate assembly 3 is raised above the flow channel, and the swing valve disc 4 opens the valve by the thrust of the medium. When the medium flows backward, the valve disc 4 automatically closes to prevent backflow. When the medium flows in reverse, the valve disc 4 rotates downward and forms a seal after fitting against the sealing surface of the valve seat 2, thus closing the valve (as shown). Figure 3 As shown in the figure, when the valve is fully closed, its function is equivalent to that of a gate valve, which can force the valve to shut off.

[0030] Next, a gate body 31 is provided to cooperate with the valve seat 2 at the outlet of the valve. The gate body 31 is installed on the gate frame 32 and connected by a fixed pin 34 to prevent the gate body 31 from rotating. A gate guide block 33 is installed at the other end of the gate frame 32. There are two gate guide blocks 33, which are fixedly connected to the gate frame 32 by hexagonal screws 35. After assembly, these parts are a whole and move up and down with the valve stem 8 to complete the opening and closing operations. The sealing surface of the gate body 31 has the same slope as the valve seat 2 to ensure that the valve is sealed after the gate body 31 is closed.

[0031] When the gate assembly 3 of the valve is in the open state, the entire valve function is equivalent to a swing check valve, allowing flow in the forward direction and stopping in the reverse direction. The check valve can be closed by the thrust of the medium in the direction of flow, or by the gate assembly 3. Regardless of whether the valve disc 4 of the check valve is in the fully open, half open, or closed state, turning the handwheel of the operating device will rotate the valve stem 8, causing the gate assembly 3 to move downward, thus closing the valve.

[0032] And, as Figure 5 As shown, a fan-shaped flange is provided on the boss that mates with the gate frame 32 and the gate body 31. This flange can be used to bear the thrust of the gate body 31. After the gate body 31 and the gate frame 32 are assembled, a fixed pin 34 is used for through insertion to prevent the gate body 31 from rotating during the opening and closing process, so that the sealing surface of the gate body 31 always remains parallel to the sealing surface of the valve seat 2. A countersunk hole is also provided on the right side plane of the gate frame 32. This countersunk hole is used to install the internal hexagon screw 35. The gate guide block 33 is installed on the other side and is fastened with internal hexagon screw 35. A "T" groove is provided on the top of the gate frame 32 for connecting the valve stem 8, so that the valve stem 8 can drive the entire gate assembly 3 to move up and down, thereby realizing the opening and closing of the valve.

[0033] Moreover, such as Figure 5 As shown, one end of the gate guide block 33 is provided with two threaded holes, and the other side is wedge-shaped, which is used to support and slide the valve disc 4 when the valve is closed.

[0034] As shown in the figure, a packing 16 is provided between the valve cover 13 and the valve stem 8. A packing sleeve 17 is provided on the top of the packing 16. A packing pressure plate 18 is provided on the top of the packing sleeve 17. The packing 16, the packing sleeve 17 and the packing pressure plate 18 are all fitted on the outside of the valve stem 8. The packing pressure plate 18 and the bracket 10 are detachably fixed together by a packing pressure plate bolt 19 and a packing pressure plate nut 20. A butterfly spring 21 is provided between the bottom of the packing pressure plate nut 20 and the packing pressure plate 18.

[0035] By installing packing (with flexible graphite packing) in the stuffing box at the upper end of the valve cover 13 and pressing it with packing sleeve 17, packing plate 18 and butterfly spring 21, and the other end of the packing plate bolt 19 and packing plate nut 20 that press the packing plate 18 are threadedly installed on the bracket 10, the sealing between the valve cover 13 and the valve body 1 can be improved.

[0036] Furthermore, a sealing ring 22, a sealing ring gasket 23, and a four-ring 24 are sequentially arranged from bottom to top between the valve cover 13 and the valve body 1. Through the cooperation of the sealing ring 22, the sealing ring gasket 23, and the four-ring 24, the sealing performance between the valve cover 13 and the valve body 1 can be further improved.

[0037] 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 within the protection scope of the present utility model.

Claims

1. A high-temperature and high-pressure dual-purpose valve, comprising a valve body (1), characterized in that: The valve body (1) is provided with two valve seats (2) and a gate assembly (3). The gate assembly (3) includes a gate body (31), a gate frame (32) and two gate guide blocks (33). The gate body (31) and the gate frame (32) are connected by a fixed pin (34). The gate frame (32) and the two gate guide blocks (33) are connected by internal hexagon screws (35). The valve body (1) is provided with a valve disc (4) inside. A rocker arm frame (5) is fixedly provided inside the valve body (1). A rocker arm (6) is connected to the valve disc (4). The top of the rocker arm (6) is connected to the rocker arm frame (5) by a pin (7). A valve stem (8) is connected to the top of the gate frame (32). The top of the valve stem (8) passes through the top of the valve body (1) and extends out of the outside of the valve body (1).

2. The high-temperature and high-pressure dual-purpose valve according to claim 1, characterized in that: The rocker arm (5) is provided with a clamping nut (9) at the top. The clamping nut (9) is fixed inside the valve body (1) and is sleeved on the outside of the valve stem (8). The valve disc (4) and the rocker arm (6) are fixed by a locking nut (27).

3. The high-temperature and high-pressure dual-purpose valve according to claim 1, characterized in that: The valve body (1) is provided with a bracket (10) on the top. The bracket (10) and the valve body (1) are detachably fixed together by multiple bracket bolts (11) and multiple bracket nuts (12).

4. The high-temperature and high-pressure dual-purpose valve according to claim 3, characterized in that: A valve cover (13) is inserted through the center of the bottom of the bracket (10), and the bottom of the valve cover (13) is located inside the valve body (1). The valve cover (13) and the bracket (10) are detachably fixed together by valve cover bolts (14) and valve cover nuts (15).

5. A high-temperature and high-pressure dual-purpose valve according to claim 4, characterized in that: A packing (16) is provided between the valve cover (13) and the valve stem (8). A packing sleeve (17) is provided on the top of the packing (16). A packing pressure plate (18) is provided on the top of the packing sleeve (17). The packing (16), the packing sleeve (17) and the packing pressure plate (18) are all fitted on the outside of the valve stem (8). The packing pressure plate (18) and the bracket (10) are detachably fixed together by a packing pressure plate bolt (19) and a packing pressure plate nut (20). A butterfly spring (21) is provided between the bottom of the packing pressure plate nut (20) and the packing pressure plate (18).

6. A high-temperature and high-pressure dual-purpose valve according to claim 4, characterized in that: The valve cover (13) and the valve body (1) are provided with a sealing ring (22), a sealing ring gasket (23) and a four-ring (24) from bottom to top.

7. A high-temperature and high-pressure dual-purpose valve according to claim 3, characterized in that: The valve stem (8) and the bracket (10) are detachably connected by a valve stem nut (25), and a bevel gear (26) is fixedly provided on the top of the bracket (10).

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