Piston type safety valve

Abstract

The utility model discloses a piston type safety valve, and relates to the technical field of safety valves. The safety valve comprises a safety valve body, a fixing lantern ring and an external pipe, a limiting assembly and a clamping assembly are arranged on the two sides of the safety valve body respectively, and the clamping assembly is used for clamping and limiting the fixing lantern ring and the safety valve body. The elastic external expansion tension of the expansion spring drives the clamping block to rebound again to be clamped with the clamping groove after the clamping block corresponds to the interior of the clamping groove, the fixing clamping ring and the external clamping ring can be clamped conveniently, the safety valve body and the external pipe can be installed conveniently, and the safety valve body and the external pipe can be installed conveniently. According to the invention, rapid installation and rapid disassembly are convenient, installation through a flange is not needed, a plurality of bolts do not need to be screwed, the installation time is saved, and the sealing performance of local connection between the fixed clamping ring and the external clamping ring is improved through the sealing performance of the silica gel pad and the tight attachment of the silica gel pad and the connection part of the fixed clamping ring and the external clamping ring.

Description

Technical Field

[0001] The utility model belongs to the technical field of safety valves, and in particular relates to a piston type safety valve. Background Art

[0002] A safety valve is a safety valve and an automatic pressure relief valve. Its opening and closing components are normally closed under external forces. When the pressure of the medium in the equipment or pipeline increases and exceeds the specified safety value, it automatically opens. By discharging a specified amount of fluid from the system, the safety valve prevents the pipeline or equipment from accumulating. It serves as a safety protection in the system. When the system pressure exceeds the specified value, the safety valve opens, releasing some of the system's gas into the atmosphere, keeping the system pressure within the allowable value and thus preventing accidents caused by excessive pressure. A safety valve is also called a relief valve. The air source pressure acts on the piston. When the pressure exceeds the safety value determined by the spring force, the piston is pushed open, and a portion of the compressed air is discharged from the valve port into the atmosphere. When the air source pressure falls below the safety value, the spring drives the piston downward, closing the valve port.

[0003] Among them, Chinese patent CN202122348089.9 discloses a piston-type safety valve, including a valve body, connecting pipes are provided on the left and right sides of the valve body, a fixing sleeve is provided on the top of the connecting pipe, the internal thread of the fixing sleeve is connected to a screw, one end of the screw is provided with a torsion disk, the other end of the screw extends to the interior of the connecting pipe and is rotatably connected to a first clamping plate, and limiting structures are provided on the front and rear sides of the first clamping plate, a plurality of first springs are provided at the bottom of the inner cavity of the first connecting pipe, a second clamping plate is provided at the other end of the first spring, and a fixing disk is provided at the other end of the connecting pipe, and straight rods are provided through the upper and lower sides of the inner cavity of the fixing disk.

[0004] At present, the installation process of valves and pipelines is mostly connected through flanges. However, when connecting flanges, it is often necessary to rotate the connecting parts, such as bolts, to make threaded connections. Many bolts need to be installed during the rotation. If many piston safety valves are installed during construction, it is relatively time-consuming and physically demanding, which reduces the operating efficiency of the operator during installation to a certain extent.

[0005] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0006] In view of the problems in the related technology, the present invention proposes a piston type safety valve to overcome the above technical problems existing in the existing related technology.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The utility model is a piston-type safety valve, comprising a safety valve body, a fixed collar and an external pipe. A limit assembly and a clamping assembly are respectively provided on both sides of the safety valve body. The clamping assembly is used to clamp and limit the fixing collar and the safety valve body. The limit assembly is used to fix the fixing collar and the safety valve body after the clamping assembly is limited. Connecting pipes are connected to both sides of the safety valve body. The surfaces of the two connecting pipes are connected to the fixing collars. One end of the two external pipes is respectively fitted with one end of the two connecting pipes.

[0009] Furthermore, the limit assembly includes four connecting plates, four fixed plates, four blocks and eight expansion springs, each two connecting plates are respectively arranged on the surface of each connecting tube, the inner side of each connecting plate is slidably connected to two sliding rods, the surface of each fixed plate is respectively connected to one end of each two sliding rods, the four blocks are respectively arranged at one end of four of the sliding rods, and one end of the other four sliding rods are connected to a limit ring, the surfaces of the four limit rings are connected to a silicone pad, and each expansion spring is respectively sleeved on the surface of each sliding rod.

[0010] Furthermore, two ends of each of the expansion springs are respectively connected to the surface of each of the fixing plates and the surface of each of the connecting plates.

[0011] Furthermore, the clamping assembly includes two fixed clamping rings and eight clamping slots, each of the fixed clamping rings is respectively connected to one side of each fixed sleeve ring, and each of the external clamping rings is respectively clamped with the inner side of each fixed clamping ring, four of the clamping slots are respectively symmetrically opened on the upper and lower sides of the horizontal center line of the two fixed clamping rings, and the other four clamping slots are respectively symmetrically opened on the upper and lower sides of the horizontal center line of the two external clamping rings, and every two clamping slots are connected.

[0012] Furthermore, each of the card blocks is respectively engaged and connected with each of the card slots.

[0013] Furthermore, the inner side of each of the fixing clamps is connected to the surface of each of the connecting pipes, and the inner sides of the two external clamps are connected to the surfaces of the two external pipes respectively.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model first aligns the positions of the limit assembly and the snap assembly, then splices the external pipe and the connecting pipe accordingly, and then snaps the limit assembly and the snap assembly together. At this time, the external pipe and the connecting pipe are installed through snapping force, which is convenient for quick installation and quick disassembly. There is no need to install through flanges or to screw multiple bolts, which helps save installation time.

[0016] 2. The utility model uses the elastic external expansion force of the expansion spring itself to facilitate the block to rebound and reset to engage with the slot after the block corresponds to the inside of the slot, so as to facilitate the engagement of the fixed clamping ring with the external clamping ring, and facilitate the installation between the safety valve body and the external pipe. It is convenient and quick to install and also convenient to disassemble. There is no need to install through a flange and there is no need to screw multiple bolts, which helps to save installation time. The sealing performance of the silicone gasket and the close contact between the silicone gasket and the connection between the fixed clamping ring and the external clamping ring help improve the sealing performance of the local connection between the fixed clamping ring and the external clamping ring.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the partial structure of the cross section of the utility model;

[0022] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure at point A;

[0023] Figure 5 It is a schematic diagram of a local dispersed structure of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0025] 1. Safety valve body; 2. Limit assembly; 21. Connecting plate; 22. Slide rod; 23. Fixed plate; 24. Clamping block; 25. Limiting ring; 26. Silicone pad; 27. Expansion spring; 3. Clamping assembly; 31. Fixed clamping ring; 32. External clamping ring; 33. Clamping groove; 4. Connecting pipe; 5. Fixed collar; 6. External pipe. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the utility model embodiments in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the utility model embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of utility model protection.

[0027] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0028] See also Figure 1-Figure 5 As shown, the utility model is a piston-type safety valve, comprising a safety valve body 1, a fixed collar 5 and an external pipe 6. A limit assembly 2 and a clamping assembly 3 are respectively provided on both sides of the safety valve body 1. The clamping assembly 3 is used to clamp and limit the fixing collar 5 and the safety valve body 1. The limit assembly 2 is used to fix the fixing collar 5 and the safety valve body 1 after the clamping assembly 3 is limited. Connecting pipes 4 are connected to both sides of the safety valve body 1. The surfaces of the two connecting pipes 4 are connected to the fixing collars 5. One end of the two external pipes 6 is respectively fitted with one end of the two connecting pipes 4.

[0029] First, align the positions of the limiting component 2 and the locking component 3, then splice the external tube 6 and the connecting tube 4 accordingly, and then lock the limiting component 2 and the locking component 3. At this time, the external tube 6 and the connecting tube 4 are installed through the locking force, which is convenient for quick installation and quick disassembly. There is no need to install through flanges and there is no need to screw multiple bolts, which helps save installation time.

[0030] By engaging the limiting component 2 with the engaging component 3, it is convenient to quickly position the connecting pipe 4 and the external pipe 6, and even facilitate the installation between the safety valve body 1 and the external pipe 6. It is convenient and quick to install and also convenient to quickly disassemble. There is no need to install through a flange and there is no need to screw multiple bolts, which helps to save installation time. At the same time, the limiting component 2 is engaged with the engaging component 3, which helps to improve the sealing of the local connection between the external pipe 6 and the connecting pipe 4.

[0031] In one embodiment, for the above-mentioned limit assembly 2, the limit assembly 2 includes four connecting plates 21, four fixed plates 23, four blocks 24 and eight expansion springs 27. Every two connecting plates 21 are respectively arranged on the surface of each connecting tube 4. The inner side of each connecting plate 21 is slidably connected to two sliding rods 22. The surface of each fixed plate 23 is respectively connected to one end of every two sliding rods 22. The four blocks 24 are respectively arranged at one end of four of the sliding rods 22. One end of the other four sliding rods 22 is connected to a limit ring 25. The surfaces of the four limit rings 25 are connected to a silicone pad 26. Each expansion spring 27 is respectively sleeved on the surface of each sliding rod 22.

[0032] First, the installation on the right side is described as an example. The installation process on the left side is the same. Then place the safety valve body 1 on the horizontal ground, then pull the upper and lower connecting plates 21 outward, and then align the positions of the card blocks 24 of the clamping assembly 3, that is, make the port of the external pipe 6 fit correspondingly with the port of the connecting pipe 4, and then loosen the two fixing plates 23. Then, the two fixing plates 23 will drive the card blocks 24 to re-engage with the clamping assembly 3 under the elastic reset action of the expansion spring 27. At this time, the clamping assembly 3 and the external pipe 6 are aligned with the connecting pipe 4. The locking installation limits the movement, and when the locking block 24 moves, the limiting ring 25 and the silicone pad 26 will also be driven to move together. Therefore, after the corresponding installation between the external tube 6 and the connecting tube 4 is completed, the corresponding two silicone pads 26 will be tightly attached to the surface of the external tube 6, thereby generating a corresponding clamping force on the surface of the external tube 6, and then helping to improve the installation stability of the external tube 6. At the same time, the silicone pad 26 is tightly attached to the connection of the locking component 3, which helps to improve the sealing of the local connection between the locking components 3. Similarly, the installation on the left side of the safety valve body 1 is the same as above, and the operation is simple.

[0033] The elastic outward expansion force of the expansion spring 27 itself facilitates the block 24 to rebound and reset to engage with the clamping assembly 3 after the block 24 corresponds to the inside of the clamping assembly 3, making it convenient to install the safety valve body 1 and the external pipe 6 through the clamping assembly 3. It is convenient and quick to install and also convenient to disassemble. There is no need to install through a flange and there is no need to screw multiple bolts, which helps to save installation time. The silicone pad 26 is tightly attached to the connection of the clamping assembly 3, which helps to improve the sealing of the local connection between the clamping assemblies 3.

[0034] In addition, in specific applications, the expansion spring 27 is a spring compression spring with a certain strong pushing force, such as a compression spring. The compression spring is a coil spring that withstands axial pressure. There is a certain gap between the turns. When subjected to external loads, the spring contracts and deforms, storing deformation energy, and thus can provide a stable pushing force to improve the locking installation stability between the clamping block 24 and the locking component 3. When the expansion spring 27 is subjected to external pulling, a reaction force will be generated, which will help drive the clamping block 24 to rebound and reset and re-engage with the locking component 3.

[0035] In one embodiment, for the above-mentioned expansion springs 27, the two ends of each two expansion springs 27 are respectively connected to the surface of each fixed plate 23 and the surface of each connecting plate 21, so that when the clamping block 24 is subjected to a pulling force, an elastic reset force will be generated accordingly, thereby facilitating the clamping block 24 to re-engage with the clamping assembly 3.

[0036] In one embodiment, for the above-mentioned locking assembly 3, the locking assembly 3 includes two fixed locking rings 31 and eight locking grooves 33, each of the fixed locking rings 31 is respectively connected to one side of each of the fixed sleeves 5, and each of the external locking rings 32 is respectively engaged with the inner side of each of the fixed locking rings 31, wherein four of the locking grooves 33 are symmetrically opened on the upper and lower sides of the horizontal center line of the two fixed locking rings 31, and the other four of the locking grooves 33 are symmetrically opened on the upper and lower sides of the horizontal center line of the two external locking rings 32, and every two locking grooves 33 are connected, so as to facilitate the engagement of a locking block 24 with two corresponding locking grooves 33.

[0037] In one embodiment, for the above-mentioned clamping blocks 24, each clamping block 24 is respectively engaged with each clamping groove 33, thereby improving the convenience of installation between the safety valve body 1 and the external pipe 6 and helping to reduce the time consumed in the installation operation.

[0038] In one embodiment, for the above-mentioned fixing clamping ring 31, the inner side of each fixing clamping ring 31 is connected to the surface of each connecting pipe 4, and the inner sides of the two external clamping rings 32 are respectively connected to the surfaces of the two external pipes 6, which is conducive to connecting the external pipe 6 with the safety valve body 1.

[0039] To sum up, with the help of the above-mentioned technical solution of the present invention, the installation on the right side is first described as an example, and the installation process on the left side is also not described. The installation method is the same, then place the safety valve body 1 on the horizontal ground, and then pull the upper and lower connecting plates 21 outward, and then slide the external clamping ring 32 into the interior of the fixed clamping ring 31. Since the fixed clamping ring 31 and the external clamping ring 32 are provided with multiple engaging racks, the external clamping ring 32 is now limited and engaged with the fixed clamping ring 31. After the external clamping ring 32 is engaged with the fixed clamping ring 31, the position of the clamping groove 33 corresponds to the clamping block 24. Then, the two fixing plates 23 are loosened, and the two fixing plates 23 will be elastically reset under the action of the expansion spring 27. The clamping block 24 is driven to re-engage with the clamping groove 33. At this time, the fixed clamping ring 31, the external clamping ring 32 and the external tube 6 are all engaged with the connecting tube 4 for installation and limit. When the clamping block 24 moves, the limit ring 25 and the silicone pad 26 are also driven to move together. Therefore, after the corresponding installation between the external tube 6 and the connecting tube 4 is completed, the corresponding two silicone pads 26 will be tightly attached to the surface of the external tube 6, thereby generating a corresponding clamping force on the surface of the external tube 6, thereby improving the installation stability of the external tube 6. At the same time, the silicone pad 26 is tightly attached to the connection between the fixed clamping ring 31 and the external clamping ring 32, which helps to improve the sealing of the local connection between the fixed clamping ring 31 and the external clamping ring 32. Similarly, the installation on the left side of the safety valve body 1 is the same as above, and the operation is simple.

[0040] Through the above technical solution, the elastic external expansion force of the expansion spring 27 itself facilitates the block 24 to rebound and reset to engage with the slot 33 after the block 24 corresponds to the inside of the slot 33, making it convenient to engage the fixed clamping ring 31 with the external clamping ring 32, and facilitate the installation between the safety valve body 1 and the external pipe 6. It is convenient and quick to install and also convenient to disassemble. There is no need to install through a flange and there is no need to screw multiple bolts, which helps to save installation time. The sealing of the silicone gasket 26 and the close contact between the silicone gasket 26 and the connection between the fixed clamping ring 31 and the external clamping ring 32 help improve the sealing of the local connection between the fixed clamping ring 31 and the external clamping ring 32.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The preferred embodiments of the utility model disclosed above are intended only to help illustrate the utility model. The preferred embodiments do not describe all details in detail, nor do they limit the utility model to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. This specification selects and describes these embodiments in detail to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A piston-type safety valve, comprising a safety valve body (1), a fixed collar (5) and an external pipe (6), wherein a limit assembly (2) and a clamping assembly (3) are respectively provided on both sides of the safety valve body (1), wherein the clamping assembly (3) is used to clamp and limit the fixed collar (5) and the safety valve body (1), and the limit assembly (2) is used to fix and install the fixed collar (5) and the safety valve body (1) after the clamping assembly (3) is limited. The invention is characterized in that: Both sides of the safety valve body (1) are connected to connecting pipes (4), the surfaces of the two connecting pipes (4) are connected to fixing rings (5), and one end of the two external pipes (6) is respectively fitted with one end of the two connecting pipes (4); The limiting assembly (2) includes four connecting plates (21), four fixing plates (23), four clamping blocks (24) and eight expansion springs (27), each two connecting plates (21) are respectively arranged on the surface of each connecting tube (4), the inner side of each connecting plate (21) is slidably connected to two sliding rods (22), the surface of each fixing plate (23) is respectively connected to one end of each two sliding rods (22), the four clamping blocks (24) are respectively arranged on one end of four of the sliding rods (22), and one end of the other four sliding rods (22) are connected to the limiting ring (25), the surface of the four limiting rings (25) are connected to the silicone pad (26), and each expansion spring (27) is respectively sleeved on the surface of each sliding rod (22); The clamping assembly (3) includes two fixed clamping rings (31) and eight clamping grooves (33), each of the fixed clamping rings (31) is connected to one side of each fixed collar (5), and each external clamping ring (32) is clamped to the inner side of each fixed clamping ring (31), wherein four of the clamping grooves (33) are symmetrically opened on the upper and lower sides of the horizontal center line of the two fixed clamping rings (31), and the other four of the clamping grooves (33) are symmetrically opened on the upper and lower sides of the horizontal center line of the two external clamping rings (32), and every two clamping grooves (33) are connected; Each of the clamping blocks (24) is respectively engaged and connected with each of the clamping slots (33).

2. A piston type safety valve according to claim 1, characterized in that: Both ends of each of the two expansion springs (27) are respectively connected to the surface of each of the fixing plates (23) and the surface of each of the connecting plates (21).

3. A piston type safety valve according to claim 2, characterized in that: The inner side of each fixed clamping ring (31) is connected to the surface of each connecting pipe (4), and the inner sides of the two external clamping rings (32) are respectively connected to the surfaces of the two external pipes (6).

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