A safety valve

Abstract

The utility model relates to safety valve technical field especially relates to a safety valve, including the valve cover and the valve body, the outer edge department of valve cover is rotationally provided with a plurality of threaded sleeves through the limiting ring, the top of each threaded sleeve all is provided with the driven gear, the top of valve cover still is provided with the installation box, rotationally provided with the rotating shaft in the installation box, is provided with the driving gear on the rotating shaft, the one end away from the driving gear of rotating shaft is provided with the fastening nut, and fastening nut extends to the upper end surface of installation box, the outer edge department of valve body is provided with a plurality of fixed screw rods, when rotating fastening nut drives rotating shaft and driving gear rotation, can drive a plurality of driven gears synchronous rotation, and then drive a plurality of threaded sleeves synchronous rotation, realize a plurality of threaded sleeves and a plurality of fixed screw rods'synchronous quick thread connection or separation, greatly simplified the dismounting process, realized the quick dismounting of valve cover and valve body.

Description

Technical Field

[0001] This utility model relates to the field of safety valve technology, and in particular to a safety valve. Background Technology

[0002] Safety valves are essential safety protection devices widely used in pressure-bearing equipment such as boilers, pressure vessels, and piping systems. Their core function is to automatically open and release excess media when the internal pressure exceeds a preset safety limit. This pressure relief prevents explosions, deformation, or structural damage due to overpressure, thus ensuring personnel safety, equipment integrity, and the stable operation of the process system. Their working principle is based on a force balance mechanism. When the force generated by the medium pressure pushing the valve disc exceeds the preload of the spring or counterweight, the valve disc opens to release pressure. It automatically closes again after the pressure drops to a safe range, restoring a sealed state. Depending on their structure, safety valves can be classified as spring-loaded, lever-type, or pulse-type. Regular calibration of the set pressure and sealing performance is necessary to ensure reliability, making them a key component in the safety management of pressure-bearing equipment.

[0003] Existing technology patent CN223004504U discloses a safety valve, including a valve body, a pressure pipe, and an external pressure supply device. The valve body has a pressure supply port, a pressure inlet, and a pressure relief port. The external pressure supply device is connected to the pressure chamber inside the pressure supply port through the pressure pipe. The pressure chamber is sealed with a piston. When the piston blocks the pressure chamber inside the pressure inlet from inside the valve body, the pressure chamber inside the pressure inlet is isolated from the pressure relief chamber inside the pressure relief port. When the piston opens the pressure chamber from inside the valve body, the pressure chamber inside the pressure inlet and the pressure relief chamber are connected. This prior art safety valve externalizes the pressure source, realizing the miniaturization of the entire safety valve, significantly reducing its height and volume, enabling the safety valve to be used in confined spaces. Moreover, the safety valve is lightweight, making it easy to move and disassemble.

[0004] Although the valve cover and valve body are tightly connected by multiple bolts and nuts, the process of disassembling and assembling these multiple bolts and nuts is very cumbersome, making it inconvenient to quickly disassemble and assemble the valve cover and valve body. Utility Model Content

[0005] The purpose of this utility model is to provide a safety valve that solves the technical problem that although the valve cover and valve body are tightly connected by multiple bolts and nuts in the prior art, the disassembly and assembly process of multiple bolts and nuts is very cumbersome, which makes it inconvenient to quickly disassemble and assemble the valve cover and valve body.

[0006] To achieve the above objectives, this utility model employs a safety valve, comprising a valve cover and a valve body. Multiple threaded sleeves are rotatably mounted on the outer edge of the valve cover via a limiting ring. A driven gear is mounted above each threaded sleeve. A mounting box is also mounted above the valve cover, and the driven gears extend into the mounting box. A rotating shaft is rotatably mounted inside the mounting box, and a driving gear is mounted on the rotating shaft. The driving gear meshes with a corresponding driven gear and is located between the multiple driven gears. A fastening nut is mounted at the end of the rotating shaft away from the driving gear, and the fastening nut extends to the upper surface of the mounting box. Multiple fixing screws are mounted on the outer edge of the valve body. The valve cover covers the valve body directly above it, and the multiple threaded sleeves are threadedly connected to the corresponding fixing screws and fitted onto the fixing screws.

[0007] The number of external teeth of the driving gear is greater than the number of external teeth of the driven gear, and the multiple driven gears are arranged in an enclosing shape on the outside of the driving gear.

[0008] The rotating ring is located below the drive gear, and the fixed ring is located above the valve cover. The mounting box has a through hole at its bottom, and the rotating ring is rotatably connected to the fixed ring through the through hole and is located above the fixed ring.

[0009] The valve body has a pressure relief pipe on its outer side and a piston rod that slides inside the valve body. Two piston bodies are provided at both ends of the piston rod, and both piston bodies abut against the inner wall of the valve body. The pressure relief pipe is located between the two piston bodies. A retaining ring is provided at the end of the valve body away from the valve cover, and the piston rod abuts against the top of the retaining ring.

[0010] The valve cover has a rotating screw threaded in the middle, which passes through the mounting box. A rotating disk is provided above the rotating screw, and a pressure plate is provided below the rotating screw, which abuts against the piston rod above.

[0011] This utility model discloses a safety valve, comprising a valve cover and a valve body. Multiple threaded sleeves are rotatably mounted on the outer edge of the valve cover via a limiting ring. Each threaded sleeve has a driven gear above it. A mounting box is also located above the valve cover, containing a rotating shaft with a driving gear. A fastening nut is located at the end of the rotating shaft away from the driving gear, extending to the upper surface of the mounting box. Multiple fixing screws are located on the outer edge of the valve body. When the fastening nut is rotated, causing the rotating shaft and driving gear to rotate, the multiple driven gears rotate synchronously, thereby causing the multiple threaded sleeves to rotate synchronously. This enables synchronous and rapid threaded connection or separation of the multiple threaded sleeves and the multiple fixing screws, greatly simplifying the assembly and disassembly process and achieving rapid assembly and disassembly of the valve cover and valve body. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional view of the present invention.

[0014] Figure 2 This is the front view of this utility model.

[0015] Figure 3 This is the utility model Figure 2 A cross-sectional view along line AA in the middle.

[0016] Figure 4 This is the utility model Figure 3 A cross-sectional view along the BB line.

[0017] Figure 5 This is the utility model Figure 3 A magnified view of a section at point C.

[0018] Figure 6 This is the utility model Figure 3 A magnified view of a section at point D.

[0019] 1-Valve cover, 2-Valve body, 3-Limit ring, 4-Threaded sleeve, 5-Driven gear, 6-Mounting box, 7-Rotating shaft, 8-Driving gear, 9-Fastening nut, 10-Fixing screw, 11-Rotating ring, 12-Fixing ring, 13-Through hole, 14-Pressure relief pipe, 15-Piston rod, 16-Piston body, 17-Supporting ring, 18-Rotating screw, 19-Rotating disc, 20-Pressure plate. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0021] Please see Figures 1-6 This utility model provides a safety valve, including a valve cover 1 and a valve body 2. Multiple threaded sleeves 4 are rotatably disposed on the outer edge of the valve cover 1 via a limiting ring 3. A driven gear 5 is disposed above each threaded sleeve 4. A mounting box 6 is also disposed above the valve cover 1, and the multiple driven gears 5 extend into the mounting box 6. A rotating shaft 7 is rotatably disposed within the mounting box 6, and a driving gear 8 is disposed on the rotating shaft 7. The driving gear 8 meshes with the corresponding driven gear 5 and is located between the multiple driven gears 5. A fastening nut 9 is disposed at the end of the rotating shaft 7 away from the driving gear 8, and the fastening nut 9 extends to the upper end face of the mounting box 6. Multiple fixing screws 10 are disposed on the outer edge of the valve body 2. The valve cover 1 covers the valve body 2 directly above it, and the multiple threaded sleeves 4 are threadedly connected to the corresponding fixing screws 10 and sleeved onto the fixing screws 10.

[0022] In this embodiment, the threaded engagement between the threaded sleeve 4 and the fixing screw 10 provides a basic structure for the connection between the valve cover 1 and the valve body 2. Simultaneously, the limiting ring 3 limits the threaded sleeve 4, ensuring its stability during rotation and making the connection structure more reliable. Furthermore, this connection method provides structural possibilities for subsequent rapid assembly and disassembly, avoiding the tedious process of disassembling and assembling multiple bolts and nuts one by one, thus improving the efficiency of installation and disassembly.

[0023] Furthermore, the number of external teeth of the driving gear 8 is greater than the number of external teeth of the driven gear 5, and the plurality of driven gears 5 are arranged in an enclosing shape on the outside of the driving gear 8.

[0024] In this embodiment, since the number of external teeth of the driving gear 8 is greater than that of the driven gear 5, according to the gear transmission principle, when the driving gear 8 rotates, it can drive multiple driven gears 5 to rotate rapidly with a smaller number of rotations. The multiple driven gears 5 are arranged around the outside of the driving gear 8, so that the driving gear 8 can simultaneously drive multiple driven gears 5 to rotate synchronously, thereby driving multiple threaded sleeves 4 to rotate synchronously. In this way, when disassembling and assembling the valve cover 1 and the valve body 2, only the components related to the driving gear 8 need to be operated to achieve the simultaneous connection or separation of multiple threaded sleeves 4 and multiple fixing screws 10, which greatly simplifies the operation process, further improves the disassembly and assembly speed, and effectively solves the problem of cumbersome disassembly and assembly in the traditional method.

[0025] Furthermore, a rotating ring 11 is provided below the drive gear 8, a fixed ring 12 is provided above the valve cover 1, and a through hole 13 is provided below the mounting box 6. The rotating ring 11 is rotatably connected to the fixed ring 12 through the through hole 13 and is located above the fixed ring 12.

[0026] In this embodiment, the design of this structure ensures the stable rotation of the drive gear 8. The rotational connection between the rotating ring 11 and the fixed ring 12 enables the drive gear 8 to maintain a stable axial position during rotation, reducing wobbling and deviation during rotation.

[0027] Furthermore, a pressure relief pipe 14 is provided on the outer side of the valve body 2, and a piston rod 15 is slidably provided inside the valve body 2. Two piston bodies 16 are provided at both ends of the piston rod 15. Both piston bodies 16 abut against the inner wall of the valve body 2, and the pressure relief pipe 14 is located between the two piston bodies 16. A retaining ring 17 is provided at the end of the valve body 2 away from the valve cover 1, and the piston rod 15 abuts against the top of the retaining ring 17.

[0028] In this embodiment, the pressure relief function of the safety valve is achieved through this structural design. When the system pressure exceeds the set value, the pressure pushes the piston rod 15 and the two piston bodies 16 to slide within the valve body 2, so that the space between the two piston bodies 16 is connected to the pressure relief pipe 14. The medium in the system is discharged through the pressure relief pipe 14, thereby reducing the system pressure and playing a safety protection role. The retaining ring 17 provides bottom support for the piston rod 15, ensuring the stable position of the piston rod 15 in the initial state, and also limiting the downward stroke of the piston rod 15 to prevent excessive movement. The contact design between the two piston bodies 16 and the inner wall of the valve body 2 ensures sealing performance, prevents leakage of the medium in the non-pressure relief state, and improves the reliability and safety of the safety valve.

[0029] Furthermore, a rotating screw 18 is threaded in the middle of the valve cover 1, and the rotating screw 18 passes through the mounting box 6. A rotating disk 19 is provided above the rotating screw 18, and a pressure plate 20 is provided below the rotating screw 18. The pressure plate 20 abuts against the piston rod 15 above.

[0030] In this embodiment, by rotating the rotating disk 19, the rotating screw 18 is driven to rotate threadedly in the middle of the valve cover 1, thereby realizing the up and down movement of the rotating screw 18. The pressure plate 20 below the rotating screw 18 moves up and down accordingly, applying different pressures to the piston rod 15. When it is necessary to increase the pressure relief, the rotating disk 19 is rotated to move the pressure plate 20 downward, increasing the pressure on the piston rod 15, so that the system needs a higher pressure to push the piston rod 15 to move and open the pressure relief. Conversely, when it is necessary to decrease the pressure relief, the rotating disk 19 is rotated in the opposite direction to move the pressure plate 20 upward, reducing the pressure on the piston rod 15. This adjustment method is convenient and quick, and can meet the pressure relief requirements of the safety valve under different working conditions, improving the applicability and flexibility of the safety valve.

[0031] When using this utility model, firstly, install the valve body 2 onto the system pipeline that needs protection, ensuring a secure connection and good sealing. When the valve cover 1 needs to be installed, align the valve cover 1 with the top of the valve body 2 and close it. At this time, the multiple fixing screws 10 on the valve body 2 will be inserted into the multiple threaded sleeves 4 that are rotatably set on the edge of the valve cover 1 by the limiting ring 3. Next, rotate the fastening nut 9 located on the upper end face of the mounting box 6 and connected to the rotating shaft 7 using a tool. The rotating shaft 7 will rotate accordingly, driving the driving gear 8 set on the rotating shaft 7 to rotate. Since the driving gear 8 meshes with multiple driven gears 5 that are arranged in a surrounding shape on its outside and have fewer external teeth than it, the rotation of the driving gear 8 will drive the multiple driven gears 5 to rotate synchronously, thereby driving the multiple threaded sleeves 4 to rotate synchronously, so that the threaded sleeves 4 are quickly threadedly connected to the fixing screws 10, realizing the valve cover. 1. The valve body 2 is tightly installed. During system operation, if the system pressure exceeds the set value, the pressure will push the piston rod 15, which is slidably disposed inside the valve body 2. The two piston bodies 16 at both ends of the piston rod 15 (both abutting against the inner wall of the valve body 2) will move accordingly, so that the two piston bodies 16 are connected to the pressure relief pipe 14 located on the outside of the valve body 2 between them. The medium in the system is discharged through the pressure relief pipe 14 to reduce the pressure. The retaining ring 17 at the bottom of the piston rod 15 can prevent it from moving down too much. If it is necessary to adjust the pressure relief of the safety valve, the rotating disk 19 above the rotating screw 18 threaded in the middle of the valve cover 1 can be rotated. The rotating screw 18 moves up and down under the action of the thread, driving the pressure plate 20 below (abutting against the piston rod 15) to apply different pressures to the piston rod 15, thereby changing the pressure value required for the system to push the piston rod 15 to move and open the pressure relief. When it is necessary to remove the valve cover 1, rotate the fastening nut 9 in the opposite direction. Through the above-mentioned reverse transmission process, the multiple threaded sleeves 4 are separated from the fixing screw 10, and the valve cover 1 can be removed.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A safety valve, characterized in that, The valve includes a valve cover and a valve body. Multiple threaded sleeves are rotatably mounted on the outer edge of the valve cover via a limiting ring. A driven gear is mounted above each threaded sleeve. A mounting box is also mounted above the valve cover, and the driven gears extend into the mounting box. A rotating shaft is rotatably mounted inside the mounting box, and a driving gear is mounted on the rotating shaft. The driving gear meshes with a corresponding driven gear and is located between the multiple driven gears. A fastening nut is mounted at the end of the rotating shaft away from the driving gear, and the fastening nut extends to the upper surface of the mounting box. Multiple fixing screws are mounted on the outer edge of the valve body. The valve cover covers the valve body directly above it, and the multiple threaded sleeves are threadedly connected to the corresponding fixing screws and fitted onto the fixing screws.

2. The safety valve as described in claim 1, characterized in that, The number of external teeth of the driving gear is greater than the number of external teeth of the driven gear, and the multiple driven gears are arranged in an enclosing shape on the outside of the driving gear.

3. The safety valve as described in claim 2, characterized in that, A rotating ring is provided below the drive gear, and a fixed ring is provided above the valve cover. The mounting box has a through hole at its bottom, and the rotating ring is rotatably connected to the fixed ring through the through hole and is located above the fixed ring.

4. The safety valve as described in claim 3, characterized in that, A pressure relief pipe is provided on the outside of the valve body, and a piston rod is slidably disposed inside the valve body. Two piston bodies are provided at both ends of the piston rod, and both piston bodies abut against the inner wall of the valve body. The pressure relief pipe is located between the two piston bodies. A retaining ring is provided at the end of the valve body away from the valve cover, and the piston rod abuts against the top of the retaining ring.

5. The safety valve as described in claim 4, characterized in that, A rotating screw is threaded in the middle of the valve cover and passes through the mounting box. A rotating disk is provided above the rotating screw and a pressure plate is provided below the rotating screw. The pressure plate abuts against the top of the piston rod.

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