Positioning device for inner ring of non-disc-shaped end face spring plug sealing piece

Abstract

The utility model discloses a positioning device for an inner ring of a sealing element of a non-disc type end face spring plug seal, and relates to the technical field of spring plug seals. The sealing device comprises a bottom plate and a sealing piece, wherein a positioning mechanism is arranged on the bottom plate. Through the arrangement of the positioning mechanism, in the process that the two moving seats continuously move away from each other, the multiple springs can generate different deformation according to the radian of the inner side of the PEEK fixing ring, at the moment, the electric valve is closed to separate the sealing cavity from external air, the multiple springs are prevented from rebounding, and the sealing effect is improved. The positioning rods are arranged on the bottom plate, so that the PEEK fixing ring can be positioned at the center of the top of the bottom plate by the positioning grooves in the positioning rods, the sealing element can be accurately positioned and fixed during assembly, deviation in the subsequent use process is avoided, and after the PEEK fixing ring of the same model is positioned by the mechanism, the sealing element can be accurately positioned and fixed. And a plurality of PEEK fixing rings are sequentially positioned and assembled according to the adjusted piston rod, so that the efficiency of assembling a plurality of sealing elements with the same model is improved.

Description

Technical Field

[0001] This utility model belongs to the field of sealing technology, and in particular relates to an inner ring positioning device for a non-disc-shaped end face sealing element. Background Technology

[0002] A spring seal (also known as a spring-energized seal or variseal) is a high-performance U-shaped Teflon seal with an internal special spring. The appropriate spring force, combined with system fluid pressure, pushes the sealing lip (face) forward, gently pressing it against the metal surface to create an excellent seal. The spring's actuation effect overcomes slight misalignment of the metal mating surfaces and wear of the sealing lip, thus maintaining the desired sealing performance over time.

[0003] However, during the assembly of existing non-disc-type end-face plug seals, the inner ring's arc-shaped sectional surface makes it difficult to accurately position and fix the inner ring. This leads to deviations in the assembly of various parts of the seal, resulting in an unstable seal assembly. Utility Model Content

[0004] The purpose of this utility model is to provide an inner ring positioning device for a non-disc-type end face plug seal, which solves the problem that in the assembly of existing non-disc-type end face plug seals, the inner ring is difficult to position and fix accurately due to its arc-shaped cross-section, which leads to deviations in the assembly of various parts of the seal and results in an unstable seal assembly.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a non-disc-type end face plug seal inner ring positioning device, including a base plate and a seal, wherein a positioning mechanism is provided on the base plate;

[0007] The sealing element consists of a PEEK retaining ring, a stainless steel V-shaped energy storage spring, and a PTFE shell. The stainless steel V-shaped energy storage spring is installed on the inner wall of the PTFE shell. The stainless steel V-shaped energy storage spring is sleeved on the outer wall of the PEEK retaining ring. The positioning mechanism is used to fix the position of the PEEK retaining ring. After the stainless steel V-shaped energy storage spring is sleeved on the outer wall of the PEEK retaining ring, the PTFE shell wraps around the stainless steel V-shaped energy storage spring to assemble and install the entire sealing element.

[0008] Furthermore, the positioning mechanism includes two fixed plates fixedly connected to the top surface of the base plate, a motor fixedly connected to the left side of the left fixed plate, and a bidirectional threaded rod fixedly connected to the output end of the motor through a coupling. The bidirectional threaded rod passes through the two fixed plates, and the movable seat is rotatably connected to the two fixed plates.

[0009] Furthermore, the outer wall of the bidirectional threaded rod is threaded with two movable seats, the bottom surfaces of the two movable seats are slidably connected to the top surface of the base plate, and the two movable seats are distributed in a mirror shape on the outer wall of the bidirectional threaded rod.

[0010] Furthermore, three sealing sleeves are fixedly connected to the inner walls of both movable seats, pistons are slidably connected to the inner walls of several sealing sleeves, piston rods are fixedly connected to several pistons, the ends of several piston rods away from the pistons extend to the outside of the sealing sleeves, several piston rods are slidably connected to several sealing sleeves, and connecting blocks are fixedly connected to the ends of several piston rods away from the pistons.

[0011] Furthermore, each of the connecting blocks is fixedly connected to a positioning rod on its top, and each of the positioning rods has a number of positioning grooves on its outer wall, and each of the positioning grooves is in contact with the inner wall of the PEEK fixing ring.

[0012] Furthermore, each of the sealing sleeves is provided with a spring inside, one end of each spring is fixedly connected to a piston, and the other end of each spring is fixedly connected to the inner wall of the sealing sleeve.

[0013] Furthermore, each of the two movable seats has a sealed cavity inside, and several sealing sleeves have air holes at their connection points with the two movable seats. The air holes are connected to the two sealed cavities respectively, and an electric valve is provided on the inner wall of each sealed cavity.

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

[0015] With the help of a positioning mechanism, the drive motor rotates the bidirectional threaded rod. With the cooperation of the fixed plate, the two moving seats move away from each other. At this time, multiple positioning rods on the two moving seats contact the outer wall of the PEEK fixing ring. As the two moving seats continue to move away from each other, multiple springs deform differently according to the inner curvature of the PEEK fixing ring. The electric valve is then closed to isolate the sealing cavity from the outside air, preventing the springs from rebounding. This allows the PEEK fixing ring to be positioned at the top center of the base plate by the positioning grooves on the multiple positioning rods, ensuring accurate positioning and fixation of the seal during assembly and preventing displacement during subsequent use. Furthermore, after positioning PEEK fixing rings of the same model, the mechanism sequentially positions and assembles multiple PEEK fixing rings according to the adjusted piston rod, improving the efficiency of assembling multiple seals of the same model.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the positioning mechanism of this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the movable base of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the sealing element of this utility model;

[0022] Figure 5 for Figure 2 A magnified structural diagram of point A in the middle.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Base plate; 2. Positioning mechanism; 3. Seal; 21. Fixing plate; 22. Motor; 23. Double-threaded rod; 24. Moving seat; 25. Sealing sleeve; 26. Piston; 27. Piston rod; 28. Connecting block; 29. ​​Positioning rod; 291. Positioning groove; 292. Spring; 293. Air hole; 294. Sealing cavity; 295. Electric valve; 31. PEEK retaining ring; 32. Stainless steel V-shaped energy storage spring; 33. PTFE shell. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-5 As shown, this utility model is a non-disc-type end face plug seal inner ring positioning device, including a base plate 1 and a seal 3, and a positioning mechanism 2 is provided on the base plate 1;

[0027] The sealing element 3 consists of a PEEK retaining ring 31, a stainless steel V-shaped energy storage spring 32, and a PTFE shell 33. The inner wall of the PTFE shell 33 is provided with a stainless steel V-shaped energy storage spring 32, which is sleeved on the outer wall of the PEEK retaining ring 31. The positioning mechanism 2 is used to fix the position of the PEEK retaining ring 31, so that after the stainless steel V-shaped energy storage spring 32 is sleeved on the outer wall of the PEEK retaining ring 31, the PTFE shell 33 wraps around the stainless steel V-shaped energy storage spring 32 to assemble and install the entire sealing element 3.

[0028] The positioning mechanism 2 includes two fixed plates 21 fixedly connected to the top surface of the base plate 1. A motor 22 is fixedly connected to the left side of the left fixed plate 21. The output end of the motor 22 is fixedly connected to a bidirectional threaded rod 23 via a coupling. The bidirectional threaded rod 23 passes through the two fixed plates 21. The movable seats 24 are rotatably connected to the two fixed plates 21. Two movable seats 24 are threadedly connected to the outer wall of the bidirectional threaded rod 23. The bottom surfaces of the two movable seats 24 are slidably connected to the top surface of the base plate 1. The two movable seats 24 are mirror images of each other. On the outer wall of the bidirectional threaded rod 23, three sealing sleeves 25 are fixedly connected to the inner walls of the two movable seats 24. Pistons 26 are slidably connected to the inner walls of several sealing sleeves 25. Piston rods 27 are fixedly connected to several pistons 26. The ends of several piston rods 27 away from the pistons 26 extend to the outside of the sealing sleeves 25. Several piston rods 27 are slidably connected to several sealing sleeves 25. Connecting blocks 28 are fixedly connected to the ends of several piston rods 27 away from the pistons 26. Each connecting block 28 has a positioning rod 29 fixedly connected to its top. The outer walls of each positioning rod 29 have positioning grooves 291 that contact the inner wall of the PEEK fixing ring 31. Each sealing sleeve 25 has a spring 292 inside. One end of each spring 292 is fixedly connected to a piston 26, and the other end is fixedly connected to the inner wall of the sealing sleeve 25. Both movable seats 24 have sealing grooves inside. The cavity 294, the connection between the several sealing sleeves 25 and the two movable seats 24 are all provided with air holes 293, the several air holes 293 are respectively connected to the two sealing cavities 294, and the inner wall of the sealing cavity 294 is provided with an electric valve 295. By providing a positioning mechanism 2, the PEEK fixing ring 31 can be positioned at the top center of the base plate 1 by the positioning grooves 291 on the multiple positioning rods 29, ensuring that the sealing element 3 can be accurately positioned and fixed during assembly, and avoiding displacement during subsequent use.

[0029] A specific application of this embodiment is as follows: With the positioning mechanism 2 in place, when the two electric valves 295 are opened to allow the sealed cavity 294 to communicate with the outside air, the PEEK fixing ring 31 is placed on top of the fixing plate 21, allowing multiple positioning rods 29 to pass through the PEEK fixing ring 31 and be distributed on its inner side. The drive motor 22 drives the bidirectional threaded rod 23 to rotate. With the cooperation of the fixing plate 21, the two moving seats 24 move away from each other. At this time, the multiple positioning rods 29 on the two moving seats 24 contact the outer wall of the PEEK fixing ring 31. During the continuous movement of the two moving seats 24 away from each other, multiple springs 292... The PEEK retaining ring 31 will deform differently depending on the inner curvature. At this time, the electric valve 295 is closed to isolate the sealing cavity 294 from the outside air, preventing the multiple springs 292 from rebounding. This allows the PEEK retaining ring 31 to be positioned at the top center of the base plate 1 by the positioning grooves 291 on the multiple positioning rods 29. This ensures that the seal 3 can be accurately positioned and fixed during assembly, avoiding displacement during subsequent use. After positioning the PEEK retaining ring 31 of the same model, the mechanism will sequentially position and assemble multiple PEEK retaining rings 31 according to the adjusted piston rod 27, improving the efficiency of assembling multiple seals of the same model 3.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.

[0031] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A positioning device for the inner ring of a non-disc-shaped end-face plug seal, characterized in that: It includes a base plate (1) and a sealing element (3), and a positioning mechanism (2) is provided on the base plate (1). The positioning mechanism (2) includes a movable seat (24). The sealing element (3) is composed of a PEEK retaining ring (31), a stainless steel V-shaped energy storage spring (32) and a PTFE shell (33). The inner wall of the PTFE shell (33) is provided with a stainless steel V-shaped energy storage spring (32). The stainless steel V-shaped energy storage spring (32) is sleeved on the outer wall of the PEEK retaining ring (31). The positioning mechanism (2) is used to fix the position of the PEEK retaining ring (31). After the stainless steel V-shaped energy storage spring (32) is sleeved on the outer wall of the PEEK retaining ring (31), the stainless steel V-shaped energy storage spring (32) is wrapped by the PTFE shell (33) to assemble and install the entire sealing element (3).

2. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 1, characterized in that: The positioning mechanism (2) includes two fixed plates (21) fixedly connected to the top surface of the base plate (1). A motor (22) is fixedly connected to the left side of the fixed plate (21) on the left side. The output end of the motor (22) is fixedly connected to a bidirectional threaded rod (23) through a coupling. The bidirectional threaded rod (23) passes through the two fixed plates (21). The movable seat (24) is rotatably connected to the two fixed plates (21).

3. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 2, characterized in that: The outer wall of the bidirectional threaded rod (23) is threaded with two movable seats (24). The bottom surfaces of the two movable seats (24) are slidably connected to the top surface of the base plate (1). The two movable seats (24) are distributed in a mirror shape on the outer wall of the bidirectional threaded rod (23).

4. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 3, characterized in that: Three sealing sleeves (25) are fixedly connected to the inner walls of the two movable seats (24). Pistons (26) are slidably connected to the inner walls of several sealing sleeves (25). Piston rods (27) are fixedly connected to several pistons (26). The end of several piston rods (27) away from the piston (26) extends to the outside of the sealing sleeves (25). Several piston rods (27) are slidably connected to several sealing sleeves (25). A connecting block (28) is fixedly connected to the end of several piston rods (27) away from the piston (26).

5. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 4, characterized in that: The top of each of the connecting blocks (28) is fixedly connected with a positioning rod (29), and the outer wall of each of the positioning rods (29) is provided with a number of positioning grooves (291), and the positioning grooves (291) are in contact with the inner wall of the PEEK fixing ring (31).

6. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 5, characterized in that: Each of the sealing sleeves (25) is provided with a spring (292). One end of each of the springs (292) is fixedly connected to a number of pistons (26), and the other end of each of the springs (292) is fixedly connected to the inner wall of each of the sealing sleeves (25).

7. The inner ring positioning device for a non-disc-shaped end-face plug seal according to claim 6, characterized in that: Both of the movable seats (24) have a sealing cavity (294) inside. Several sealing sleeves (25) are connected to the two movable seats (24) with air holes (293). Several air holes (293) are connected to the two sealing cavities (294) respectively. An electric valve (295) is provided on the inner wall of the sealing cavity (294).

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