Overpressure protection fixed ball valve

Abstract

The utility model provides an overpressure protection fixed ball valve, and relates to the technical field of overpressure protection ball valves, the overpressure protection fixed ball valve comprises a ball valve, a sealing valve core and a valve core seat, a screw rod which is coaxially distributed is fixedly arranged in the valve core seat, the screw rod is in threaded connection with a bevel gear ring which is rotatably arranged in the ball valve, and the sealing valve core is arranged in the valve core seat. A plurality of inserting frames penetrating through the inner wall of a valve port of the ball valve are fixedly installed at one end of the valve element seat, the bevel gear rotates by driving the straight gear to rotate, the bevel gear ring in meshed connection can rotate in the ball valve, the screw in the valve element seat cannot rotate, and therefore when the bevel gear ring rotates, the screw in threaded connection with the bevel gear ring can drive the valve element seat connected with the bevel gear ring to move. A gap is formed between the valve element seat and the surface of the sealing valve element, contact friction between the sealing valve element and the valve element seat in the rotating process is avoided, and abrasion to the surface of the valve element seat is avoided.

Description

Technical Field

[0001] This utility model relates to the field of overpressure protection ball valve technology, and in particular to an overpressure protection fixed ball valve. Background Technology

[0002] An overpressure protection ball valve is a valve that automatically activates a protection mechanism when the pressure exceeds a set value. It is mainly used to prevent danger caused by excessive pressure in the system. For example, a ball valve for pressure pipelines, with publication number CN219317672U, allows the ball valve to switch from the closed to the open state. First, the rotating ring is rotated to turn the rotating plate by a certain angle, causing the connecting pipe to rotate synchronously. This aligns the through hole with the connecting pipe, allowing water flow from the inlet pipe to enter the outlet pipe, thus diverting the water flow and effectively reducing the difficulty of opening the ball valve. After the ball valve is open, the rotating ring can be rotated in the opposite direction to turn the connecting pipe by a certain angle, closing the connecting pipe. By diverting the water flow before opening the ball valve, the pressure of the water flow on the sealing valve core is greatly reduced, making the opening of the sealing valve core easier. This effectively reduces frictional loss between the valve core seat and the sealing valve core, extending the service life of the ball valve.

[0003] However, the sealing valve core is always in contact with the valve core seat during rotation. Therefore, the sealing valve core will always be in contact with the sealing gasket on the surface of the valve core seat. As a result, the sealing gasket on the surface of the valve core seat will continuously wear out during the repeated rotation of the sealing valve core. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing an overpressure protection fixed ball valve.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an overpressure protection fixed ball valve, comprising a ball valve, a sealing valve core, and a valve core seat. A coaxially distributed screw is fixedly installed inside the valve core seat. A bevel gear ring rotatably installed inside the ball valve is threaded onto the screw. Several inserts penetrating the inner wall of the ball valve port are fixedly installed at one end of the valve core seat. One end of the valve core seat is located inside the ball valve cavity, and the other end is located inside the ball valve port. A sealing ring for engaging with the other end of the valve core seat is fixedly installed on the inner wall of the ball valve port. A bevel gear meshing with the bevel gear ring is provided inside the ball valve port. One end of the bevel gear extends upwards and rotatably through the ball valve, and a spur gear is fixedly installed thereon.

[0006] Preferably, a handwheel is installed on the outside of the ball valve, and a valve stem that is rotatably connected through the ball valve and fixedly installed on the handwheel and sealed to the surface of the valve core is fixedly installed on the handwheel.

[0007] Preferably, a plug is provided on the surface of the ball valve near the handwheel, and a pin is fixedly installed on the top edge of the plug, which penetrates the surface of the ball valve and is used to pass through the handwheel.

[0008] Preferably, the top edge of the plug is rotatably connected to a screw that is parallel to the pin and has a thread that penetrates the surface of the ball valve, and the bottom edge of the plug extends horizontally in a columnar shape.

[0009] Preferably, a rack that meshes with a spur gear is inserted into the surface of the ball valve, and a connecting frame is fixedly installed between the two racks. The surface of the connecting frame passes through an insert and a slanted frame that is inserted into the extension of the insert is fixedly installed on the surface of the connecting frame.

[0010] Preferably, the ball valve surface extends outward near the handwheel and is fitted onto the connecting bracket.

[0011] Preferably, the connecting bracket is slidably connected to the top edge of the ball valve via a handwheel.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, the bevel gear is rotated by driving the spur gear to rotate, which enables the meshing bevel gear ring to rotate inside the ball valve. The screw inside the valve core seat does not rotate. Therefore, when the bevel gear ring rotates, the screw threaded to it will drive the connected valve core seat to move, so that a gap is generated between the valve core seat and the surface of the sealing valve core. This ensures that the sealing valve core will not come into contact with the valve core seat during the rotation process, and ensures that the surface of the valve core seat will not be worn.

[0014] 2. In this utility model, by setting a pin, the insertion plug descends and drives the pin to descend and disengage from the handwheel, so that the sealing valve core can rotate smoothly. At the same time, when the insertion plug descends, it will push the inclined frame to move to the left. Under the connection of the connecting frame, the racks connected at both ends move synchronously, thereby realizing the rotation of the corresponding meshing spur gear, so that the two valve core seats move towards each other and disengage from the sealing valve core, preventing personnel from neglecting to adjust the position of the valve core seats before the ball valve is opened and closed. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of an overpressure protection fixed ball valve is provided for this utility model;

[0016] Figure 2 This utility model proposes an overpressure protection fixed ball valve. Figure 1 A schematic diagram of the side view structure;

[0017] Figure 3 This utility model provides a structural schematic diagram of an overpressure protection fixed ball valve insert;

[0018] Figure 4This utility model proposes an overpressure protection fixed ball valve. Figure 1 A cross-sectional structural diagram.

[0019] Legend: 1. Ball valve; 2. Handwheel; 3. Connecting bracket; 4. Spur gear; 5. Rack; 6. Valve stem; 7. Sealing valve core; 8. Valve core seat; 9. Bevel gear ring; 10. Bevel gear; 11. Sealing ring; 12. Insert bracket; 13. Angled frame; 14. Insert; 15. Screw; 16. Pin; 17. Screw rod. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figures 1-4 As shown, an overpressure protection fixed ball valve includes a ball valve 1, a sealing valve core 7, and a valve core seat 8. A coaxially distributed screw 17 is fixedly installed inside the valve core seat 8. A bevel gear ring 9, rotatably mounted inside the ball valve 1, is threaded onto the screw 17. Several inserts 12 penetrating the inner wall of the ball valve 1's valve port are fixedly installed at one end of the valve core seat 8. One end of the valve core seat 8 is located inside the inner cavity of the ball valve 1, and the other end is located inside the valve port of the ball valve 1. A sealing ring 11 for engaging with the other end of the valve core seat 8 is fixedly installed on the inner wall of the ball valve 1's valve port. A bevel gear 10, meshing with the bevel gear ring 9, is provided inside the ball valve 1's valve port. One end of the bevel gear 10 extends upwards, rotatably connecting to and fixedly mounting a spur gear 4 through the ball valve 1. When the valve core seat 8 is in contact with the sealing valve core 7, the other end of the valve core seat 8 contacts and fits with the sealing ring 11 in the corresponding port of the ball valve 1, thus achieving a seal. When the sealing valve core 7 needs to be rotated, the bevel gear 10 is rotated by driving the spur gear 4 to rotate, which enables the meshing bevel ring 9 to rotate in the ball valve 1. The bracket 12 ensures that the valve core seat 8 will not rotate, thus ensuring that the screw 17 fixed in the valve core seat 8 will not rotate. Therefore, when the bevel ring 9 rotates, the screw 17 threaded to it will drive the connected valve core seat 8 to move, creating a gap between the valve core seat 8 and the surface of the sealing valve core 7, ensuring that the sealing valve core 7 will not contact or rub against the valve core seat 8 when it rotates.

[0023] To ensure the stability of ball valve 1 in both open and closed states: a handwheel 2 is installed on the outside of ball valve 1. A valve stem 6 is fixedly installed on handwheel 2, which is rotatably connected to ball valve 1 and fixedly installed on the surface of sealing valve core 7. A plug 14 is provided on the surface of ball valve 1 near handwheel 2. A pin 16 is fixedly installed on the top edge of plug 14, which penetrates the surface of ball valve 1 and is used to pass through handwheel 2. A screw 15, which is parallel to pin 16 and threaded through the surface of ball valve 1, is also rotatably connected to the top edge of plug 14. The bottom edge of plug 14 extends horizontally and is columnar. Under normal circumstances, the pin 16 passes through the edge of handwheel 2 to prevent handwheel 2 from rotating. Therefore, it can prevent the valve stem 6 fixed to handwheel 2 and the sealing valve core 7 connected to valve stem 6 from rotating. Conversely, when the sealing valve core 7 needs to rotate, by rotating screw 15, the plug 14 is lowered by the restriction of pin 16 passing through the surface of ball valve 1, until pin 16 disengages from handwheel 2, and handwheel 2 can then rotate.

[0024] To prevent personnel from neglecting to adjust the position of the valve core seat 8 before opening and closing the ball valve 1: a rack 5 is inserted into the surface of the ball valve 1 and meshes with the spur gear 4. A connecting frame 3 is fixedly installed between the two racks 5. The surface of the connecting frame 3 passes through the insert 14, and a slanted frame 13 is fixedly installed on the surface of the connecting frame 3 and inserts into the extension of the insert 14. The surface of the ball valve 1 extends outward near the handwheel 2 and fits onto the connecting frame 3. The connecting frame 3 is slidably connected to the top edge of the ball valve 1 via the handwheel 2. Figure 3 When rotating handwheel 2, the insert 14 needs to descend. The extension of the insert 14 is columnar. Therefore, when the insert 14 descends, the columnar part on its surface will slide inside the inclined frame 13, causing the insert 14 to descend and push the inclined frame 13 to move to the left. Under the connection of the connecting frame 3, the racks 5 connected at both ends move synchronously, thereby realizing the rotation of the corresponding meshing spur gear 4. In addition, by adjusting the direction of the threads on the surfaces of the two screws 17, when the two spur gears 4 rotate simultaneously, the two valve core seats 8 move towards each other and disengage from the sealing valve core 7, which facilitates the rotation of the sealing valve core 7 to open or close. After the sealing valve core 7 has rotated, the insert 14 rises, and the columnar part on its surface moves to the right when the inclined frame 13 is connected to it. Under the connection of the connecting frame 3, the rack 5 moves in the opposite direction to reset, and the screws 17 rotate in the opposite direction. This allows the two valve core seats 8 to move relative to each other and re-fit against the surface of the sealing valve core 7.

[0025] Working principle: When the sealing valve core 7 needs to be rotated, the screw 15 is rotated. The pin 16 on the insert 14 passes through the surface of the ball valve 1, causing the insert 14 to descend until the pin 16 disengages from the handwheel 2. As the insert 14 descends, it pushes the inclined frame 13 to move to the left. Under the connection of the connecting frame 3, the racks 5 connected at both ends move synchronously, thereby rotating the corresponding meshing spur gear 4. The rotation of the spur gear 4 causes the bevel gear 10 to rotate, allowing the meshing bevel ring 9 to rotate within the ball valve 1. When the bevel ring 9 rotates, the threaded screw 17 drives the connected valve core seat 8 to move, creating a gap between the valve core seat 8 and the surface of the sealing valve core 7. After the sealing valve core 7 has rotated, the insert 14 rises. The columnar portion on its surface, connected to the inclined frame 13, moves the inclined frame 13 to the right. Under the connection of the connecting frame 3, the rack 5 moves in the opposite direction to reset, allowing the screw 17 to rotate in the opposite direction. This allows the two valve core seats 8 to move relative to each other and re-fit against the surface of the sealing valve core 7.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. An overpressure protection fixed ball valve, comprising a ball valve (1), a sealing valve core (7), and a valve core seat (8), characterized in that: The valve core seat (8) is fixedly installed with coaxially distributed screws (17). A bevel gear ring (9) is threadedly connected to the screw (17) and rotatably installed in the ball valve (1). A plurality of inserts (12) penetrating the inner wall of the ball valve (1) are fixedly installed at one end of the valve core seat (8). One end of the valve core seat (8) is located in the inner cavity of the ball valve (1) and the other end is located in the valve port of the ball valve (1). A sealing ring (11) for overlapping with the other end of the valve core seat (8) is fixedly installed on the inner wall of the valve port of the ball valve (1). A bevel gear (10) that meshes with the bevel gear ring (9) is provided in the valve port of the ball valve (1). One end of the bevel gear (10) extends upward and rotatably connects with the ball valve (1) and is fixedly installed with a spur gear (4).

2. The overpressure protection fixed ball valve according to claim 1, characterized in that: A handwheel (2) is installed on the outside of the ball valve (1), and a valve stem (6) is fixedly installed on the handwheel (2) and is rotatably connected to the ball valve (1) and fixedly installed on the surface of the sealing valve core (7).

3. The overpressure protection fixed ball valve according to claim 2, characterized in that: A plug (14) is provided on the surface of the ball valve (1) near the handwheel (2). A pin (16) is fixedly installed on the top edge of the plug (14) to penetrate the surface of the ball valve (1) and to penetrate the handwheel (2).

4. The overpressure protection fixed ball valve according to claim 3, characterized in that: The top edge of the plug (14) is also rotatably connected to a screw (15) that is parallel to the pin (16) and has a thread that penetrates the surface of the ball valve (1). The bottom edge of the plug (14) extends horizontally and is arranged in a columnar shape.

5. The overpressure protection fixed ball valve according to claim 4, characterized in that: The ball valve (1) has a rack (5) inserted into its surface that meshes with a spur gear (4). A connecting frame (3) is fixedly installed between the two racks (5). The connecting frame (3) has a plug (14) on its surface and a slanted frame (13) that is inserted into the extension of the plug (14) is fixedly installed on its surface.

6. The overpressure protection fixed ball valve according to claim 5, characterized in that: The ball valve (1) extends outward from the handwheel (2) and is fitted onto the connecting bracket (3).

7. The overpressure protection fixed ball valve according to claim 6, characterized in that: The connecting frame (3) is slidably connected to the top edge of the ball valve (1) via the handwheel (2).

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