An air compressor gas seal valve plate assembly

Abstract

An air compressor gas seal valve plate assembly, the inside of the limiting frame is provided with a limiting slot penetrating along the thickness direction thereof, the surface of one side of the limiting frame is provided with a first sealing plate, the first sealing plate is provided with a ventilation hole penetrating the thickness thereof, a second sealing plate is arranged in the inside of the limiting slot and is in sliding fit with the inner wall of the limiting slot, the surface of one side of the second sealing plate facing the first sealing plate is fixedly provided with a mounting plate, one end of a connecting pipeline is arranged in the ventilation hole and is fixedly connected with the surface of the mounting plate, the other end is exposed to the side of the first sealing plate away from the limiting frame, and the inside of the connecting pipeline is provided with a filter screen. The limiting slot is of rectangular section, the depth is greater than the thickness of the second sealing plate, a small moving gap is formed, the sealing plate can still freely slide under the condition of thermal expansion or manufacturing tolerance, the bilateral mounting frame and the sliding connecting block provide a linear guide structure, the buffer damping rod absorbs impact energy, and violent impact or vibration is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of air compressor technology, specifically an air compressor gas sealing valve plate assembly. Background Technology

[0002] In the structure of an air compressor, the gas sealing valve plate assembly, as a component controlling the gas flow and maintaining structural sealing, directly affects the overall operating efficiency, reliability, and service life of the machine. However, the existing sealing valve plate assembly has the following technical problems, specifically as follows: First, traditional sealing valve plates often use single-sided guide grooves or simple slides for limiting. Under pneumatic drive, the sealing plate is prone to tilting, warping or even jamming due to uneven force. Especially under high temperature conditions, the thermal expansion of metal further exacerbates the uncertainty of the movement gap.

[0003] Secondly, traditional equipment often uses spring pins, buckles, or threaded locking contact mechanisms, which are prone to wear, loosening, or even breakage due to repeated contact of the friction pairs under frequent start-stop conditions, leading to locking failure. Once the sealing plate unexpectedly rebounds, it will directly damage the structural sealing state, causing gas leakage, and in severe cases, even causing the compressor to shut down.

[0004] To address this issue, an air compressor gas sealing valve plate assembly is provided. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, the present invention provides an air compressor gas sealing valve plate assembly to at least partially solve the above technical problems.

[0006] The technical solution adopted by this utility model is as follows: This utility model proposes an air compressor gas sealing valve plate assembly, comprising: A limiting frame is provided, wherein a limiting groove is provided inside the limiting frame and extends through its thickness direction, and a first sealing plate is provided on one side surface of the limiting frame, wherein a ventilation hole is provided on the first sealing plate and extends through its thickness. The second sealing plate is disposed inside the limiting groove and slides in cooperation with the inner wall of the limiting groove. A mounting plate is fixedly provided on the side surface of the second sealing plate facing the first sealing plate. The connecting pipe has one end inserted into the ventilation hole and fixedly connected to the surface of the mounting plate, and the other end exposed on the side of the first sealing plate away from the limiting frame. The connecting pipe is equipped with a filter screen.

[0007] As a further embodiment of this utility model, it also includes: two sets of mounting frames, which are respectively fixedly disposed on both sides of the inner wall of the limiting groove. Each set of mounting frames has a mounting groove inside. The mounting groove is provided with a sliding connecting block inside. One side of the sliding connecting block is fixedly connected to the outer wall of the second sealing plate. Buffer damping rods are provided on both sides of the sliding connecting block. The other end of the buffer damping rod is fixedly connected to the inner wall of the mounting groove.

[0008] As a further improvement of this utility model, it also includes: two limiting rods, which are respectively fixed to the outer walls on both sides of the second sealing plate and located between the two sets of mounting frames. A positive magnetic plate is sleeved on the outer periphery of the limiting rods. Two fixed baffles are provided, which are respectively fixed on the left and right sides of the surface of the limiting frame away from the first sealing plate. The inner wall of the fixed baffle is provided with a negative magnetic plate. The positive magnetic plate and the negative magnetic plate are magnetically fixedly connected when the second sealing plate moves to the limiting position. The height and thickness of the fixed baffle do not interfere with the reciprocating movement of the second sealing plate in the limiting groove.

[0009] As a further improvement of this utility model: the limiting groove is a rectangular groove, and the depth of the limiting groove is greater than the thickness of the second sealing plate, so that the second sealing plate has a moving gap along the thickness direction in the limiting groove.

[0010] As a further improvement of this utility model: the ventilation hole is set as a circular through hole, the axis of which coincides with the axis of the connecting pipe, the connecting pipe is fixedly connected to the mounting plate by welding or threading, and the inner diameter of the connecting pipe matches the diameter of the ventilation hole.

[0011] As a further embodiment of this utility model: the mounting frame is configured as a U-shaped metal frame with its opening facing the center of the limiting groove, the mounting groove is a rectangular groove opened along the length direction of the mounting frame, and the sliding connecting block is a rectangular block that slides with the mounting groove.

[0012] As a further embodiment of this utility model: the limiting rod is a cylindrical metal rod with its axis parallel to the width direction of the limiting frame. The two ends of the limiting rod are welded and fixed to the outer walls of the two sides of the second sealing plate, respectively. The positive pole magnetic plate is an annular permanent magnet, which is sleeved and bonded to the outer periphery of the middle part of the limiting rod.

[0013] As a further embodiment of this utility model: the fixed baffle is an L-shaped metal plate, the vertical part of which is fixed to the surface of the limiting frame away from the first sealing plate by bolts, the horizontal part extends toward the center of the limiting groove, and the negative magnetic plate is an annular permanent magnet with the opposite polarity to the positive magnetic plate, which is embedded and bonded to the inner side of the horizontal part of the fixed baffle.

[0014] Implementing the embodiments of this utility model will have the following beneficial effects: In this embodiment, the limiting groove has a rectangular cross-section and a depth greater than the thickness of the second sealing plate, forming a small movement gap to ensure that the sealing plate can still slide freely under thermal expansion or manufacturing tolerance conditions. The double-sided mounting frame and sliding connecting block provide a linear guiding structure, while the buffer damping rod absorbs impact energy to avoid severe impacts or vibrations.

[0015] In this embodiment, the annular positive magnetic plate sleeved on the outer periphery of the limiting rod and the negative magnetic plate embedded in the fixed baffle generate a strong magnetic attraction when the sealing plate reaches the predetermined position, achieving contactless automatic locking. This not only provides reliable holding force to prevent the sealing plate from retracting, but also avoids the wear problems of traditional mechanical locking devices. When the positive and negative magnetic plates approach each other, the magnetic force rapidly increases, and when it reaches a critical value, it can achieve rapid and firm adsorption. Since the magnetic force has a limited range of action, it is only triggered when approaching the locking position, so it will not affect normal operation during the intermediate stroke.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is an exploded view of the air compressor gas sealing valve plate assembly proposed in this embodiment of the utility model; Figure 2 This is a first structural schematic diagram of the air compressor gas sealing valve plate assembly proposed in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the second structure of the air compressor gas sealing valve plate assembly proposed in this embodiment of the utility model; Figure 4 This is a front view of the air compressor gas sealing valve plate assembly proposed in an embodiment of the present invention; Figure 5 This is a top view of the air compressor gas sealing valve plate assembly proposed in an embodiment of the present utility model; Figure 6 for Figure 4A cross-sectional view along the cutting line AA; Figure 7 for Figure 4 A cross-sectional view along the cutting line BB; Figure 8 for Figure 5 A cross-sectional view along the section line CC.

[0019] In the diagram: 1. First sealing plate; 2. Second sealing plate; 3. Limiting frame; 4. Limiting groove; 5. Mounting frame; 6. Sliding connecting block; 7. Buffer damping rod; 8. Mounting groove; 9. Limiting rod; 10. Positive magnetic plate; 11. Negative magnetic plate; 12. Fixed baffle; 13. Ventilation hole; 14. Connecting pipe; 15. Filter screen; 16. Mounting plate.

[0020] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0022] It is important to note that the terms "first," "second," etc., are used only to distinguish between descriptive and positional descriptions, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with "first," etc., may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features. In the embodiments of this utility model, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the accompanying drawings and specific circumstances.

[0023] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0024] like Figures 1 to 8 As shown, an air compressor gas sealing valve plate assembly includes: a limiting frame 3, a limiting groove 4 extending through its thickness direction is provided inside the limiting frame 3, a first sealing plate 1 is provided on one side surface of the limiting frame 3, and a ventilation hole 13 extending through its thickness is provided on the first sealing plate 1. The second sealing plate 2 is located inside the limiting groove 4 and slides with the inner wall of the limiting groove 4. The second sealing plate 2 is fixedly provided with a mounting plate 16 on the side surface facing the first sealing plate 1. The connecting pipe 14 has one end inserted into the ventilation hole 13 and fixedly connected to the surface of the mounting plate 16, and the other end exposed on the side of the first sealing plate 1 away from the limiting frame 3. The connecting pipe 14 is equipped with a filter screen 15.

[0025] In a specific application of this utility model embodiment, when compressed air enters the connecting pipe 14 from the external pipeline, it first undergoes preliminary purification through the built-in filter 15, effectively intercepting dust, oil droplets, or tiny impurities carried in the gas, preventing these contaminants from entering the subsequent moving mechanism and causing jamming or wear. The purified clean compressed air continues to flow along the connecting pipe 14 and finally acts on the inner surface of the mounting plate 16. Since the mounting plate 16 is rigidly connected to the second sealing plate 2, the positive thrust generated by the airflow on the mounting plate 16 will be directly transmitted to the entire structure of the second sealing plate 2.

[0026] Under the thrust, the second sealing plate 2 overcomes the sliding friction resistance between itself and the inner wall of the limiting groove 4, as well as the initial damping force provided by the buffer damping mechanism, and begins to move smoothly into the limiting frame 3 along the axial direction of the limiting groove 4 (i.e., perpendicular to the first sealing plate 1). This movement is not instantaneous, but is controlled by the buffer damping rod 7. The damping rod absorbs the impact energy through hydraulic or elastic elements, keeping the movement speed of the second sealing plate 2 within a reasonable range, avoiding violent impacts or vibrations caused by sudden changes in air pressure, thereby ensuring the smoothness of the sealing action and the structural life.

[0027] Furthermore, as the second sealing plate 2 continues to advance inward, the limiting rods 9 on its two outer walls move synchronously until they approach the area of ​​the fixed baffle 12 fixed on the other side of the limiting frame 3. At this time, the positive magnetic plate 10 sleeved on the outer periphery of the limiting rod 9 and the negative magnetic plate 11 embedded in the inner wall of the fixed baffle 12 gradually approach each other, generating a strong magnetic attraction after reaching a critical distance, and quickly completing the attraction and locking. The magnetic attraction keeps the second sealing plate 2 in the preset sealing position, ensuring that the sealing state remains stable under continuous air pressure fluctuations or brief pressure loss, and that there will be no backflow or leakage. At this final position, a tight or micro-gap sealing interface is formed between the second sealing plate 2 and the first sealing plate 1, effectively blocking the unexpected leakage path of gas from the inside of the limiting frame 3 to the external environment, and achieving a highly reliable dynamic sealing function.

[0028] When the compressed air supply stops or the pressure drops below the set threshold, the thrust acting on the mounting plate 16 disappears. At this time, the elastic potential energy or hydraulic reset force stored inside the buffer damping rod 7 begins to be released, pushing the sliding connecting block 6 to move in the opposite direction, causing the second sealing plate 2 to retract outward as a whole. As the second sealing plate 2 moves away from the fixed baffle 12, the distance between the positive magnetic plate 10 and the negative magnetic plate 11 increases, and the magnetic attraction force rapidly decays to a negligible level, thereby releasing the locked state and restoring the component to its initial open position, preparing for the next sealing cycle.

[0029] In one embodiment, it further includes: two sets of mounting frames 5, which are respectively fixedly disposed on both sides of the inner wall of the limiting groove 4. Each set of mounting frames 5 has a mounting groove 8 inside. The mounting groove 8 is provided with a sliding connecting block 6 inside. One side of the sliding connecting block 6 is fixedly connected to the outer wall of the second sealing plate 2. Buffer damping rods 7 are provided on both sides of the sliding connecting block 6. The other end of the buffer damping rod 7 is fixedly connected to the inner wall of the mounting groove 8.

[0030] Two limiting rods 9 are provided, which are respectively fixed to the outer walls on both sides of the second sealing plate 2 and located between the two sets of mounting frames 5. A positive magnetic plate 10 is sleeved on the outer periphery of the limiting rods 9. Two fixed baffles 12 are provided, which are respectively fixed to the left and right sides of the surface of the limiting frame 3 facing away from the first sealing plate 1. A negative magnetic plate 11 is provided on the inner wall of the fixed baffle 12. The positive magnetic plate 10 and the negative magnetic plate 11 are magnetically fixed together when the second sealing plate 2 moves to the limiting position. The height and thickness of the fixed baffle 12 do not interfere with the reciprocating movement of the second sealing plate 2 in the limiting groove 4.

[0031] In a specific application of this utility model embodiment, when compressed air acts on the mounting plate 16 through the connecting pipe 14 and pushes the second sealing plate 2 into the limiting frame 3, the sealing plate does not move in isolation. Instead, it moves synchronously through the sliding connecting blocks 6 rigidly connected to its two outer walls, which drive the entire guiding mechanism to work together. The sliding connecting blocks 6 are embedded in the mounting grooves 8 opened inside the mounting frame 5 fixed on both sides of the limiting groove 4, forming an axial sliding pair structure. The symmetrically arranged guiding mechanism on both sides effectively constrains the deflection, warping or lateral shaking of the second sealing plate 2 during the movement process, ensuring that it always advances smoothly along a straight line, avoiding jamming or misalignment of the sealing surface caused by uneven force on one side.

[0032] Meanwhile, each set of sliding connecting blocks 6 is provided with a buffer damping rod 7 on both sides. One end of the rod is fixed to the sliding connecting block 6, and the other end is anchored to the inner wall of the mounting groove 8. The damping rod is compressed during the advancement of the second sealing plate 2. The kinetic energy is absorbed by the hydraulic oil throttling or the deformation of the elastic element, which suppresses the impact acceleration caused by the sudden increase in air pressure, so that the sealing plate approaches the end position at a controllable speed. As the second sealing plate 2 continues to penetrate into the limiting groove 4, the limiting rods 9 extending from the outer walls on both sides of the plate simultaneously pass through the gap between the two sets of mounting frames 5 and approach the end face area of ​​the limiting frame 3 away from the air intake side. When the sealing plate reaches the preset end point of the stroke, the positive magnetic plate 10 sleeved on the outer periphery of the limiting rod 9 is exactly aligned with the negative magnetic plate 11 embedded in the inner wall of the fixed baffle 12 fixed on both sides of the end face of the limiting frame 3. Since the two adopt opposite magnetic poles and are arranged oppositely, a strong attraction is generated at this time, and the magnetic attraction is quickly completed. The magnetic attraction provides a reliable mechanical holding force to prevent the sealing plate from accidentally retreating under air pressure fluctuations or vibration.

[0033] Furthermore, even in the magnetically locked state, the fixed baffle 12 exists only as a magnetic force carrier and does not participate in load-bearing or guidance, thereby avoiding interference with moving parts. At the same time, the limiting rod 9 is located between the two sets of mounting frames 5, which not only utilize the mounting frames 5 to form a lateral limiting boundary, but also retain sufficient longitudinal channels for the limiting rod 9 to move freely, further improving the space utilization and motion reliability of the structure.

[0034] When the structure stops supplying air or the pressure drops to an insufficient level to maintain thrust, the buffer damping rod 7 releases its stored energy using an internal return spring or hydraulic backflow mechanism, pushing the sliding connecting block 6 to move in the opposite direction, causing the second sealing plate 2 to retract outwards as a whole. As the limit rod 9 moves away from the fixed baffle 12, the distance between the positive and negative magnetic plates increases, and the magnetic attraction force rapidly decreases according to an inverse square law, eventually completely releasing the lock. At this time, the second sealing plate 2 smoothly returns to its initial open position under the guidance of the damping rod, and the ventilation hole 13 is reopened, preparing for the next sealing cycle.

[0035] In one embodiment, the limiting groove 4 is a rectangular groove, and the depth of the limiting groove 4 is greater than the thickness of the second sealing plate 2, so that the second sealing plate 2 has a moving gap along the thickness direction in the limiting groove 4. The ventilation hole 13 is a circular through hole, and its axis coincides with the axis of the connecting pipe 14. The connecting pipe 14 is fixedly connected to the mounting plate 16 by welding or threading, and the inner diameter of the connecting pipe 14 matches the diameter of the ventilation hole 13. The mounting frame 5 is a U-shaped metal frame with its opening facing the center of the limiting groove 4. The mounting groove 8 is a rectangular groove opened along the length direction of the mounting frame 5. The sliding connecting block 6 is a rectangular block that slides with the mounting groove 8.

[0036] In a specific application of this utility model embodiment, when compressed air enters the connecting pipe 14 from the external pipeline, because the ventilation hole 13 is a circular through hole and its axis is strictly coincident with the connecting pipe 14, the airflow can pass through the ventilation hole 13 in a straight line without disturbance, and act evenly on the force-bearing surface of the mounting plate 16. The coaxiality not only minimizes the eddy current loss and local impact caused by airflow deflection, but also ensures that the thrust direction is always perpendicular to the movement plane of the second sealing plate 2, avoiding the generation of lateral component forces that could cause the sealing plate to tilt or jam. The connecting pipe 14 is firmly connected to the mounting plate 16 by welding or threading to form a rigid integrated structure, which can maintain the connection strength and sealing integrity even under repeated impacts of high-pressure airflow, preventing performance degradation caused by loosening or leakage.

[0037] After the second sealing plate 2 is pushed, it reciprocates linearly along the thickness direction within the limiting groove 4. The limiting groove 4 has a rectangular cross-section, and its depth is slightly greater than the thickness of the second sealing plate 2, thus reserving a small but necessary movement gap (usually 0.1–0.3 mm) between them. This gap ensures that the sealing plate can still slide freely under thermal expansion or manufacturing tolerance conditions, while effectively limiting its swaying freedom in non-movement directions, preventing lateral displacement caused by vibration or airflow pulsation. At the same time, the rectangular groove wall provides a good guiding reference surface, forming multi-point contact support with the outer edge of the sealing plate, improving the straightness of the movement trajectory.

[0038] Furthermore, the two sides of the sealing plate form a sliding pair with the mounting groove 8 in the mounting frame 5 via the sliding connecting block 6. The mounting frame 5 adopts a U-shaped metal structure with the opening facing the center of the limiting groove 4, which not only facilitates the assembly and maintenance of the sliding connecting block 6, but also enhances the bending stiffness of the overall frame. The mounting groove 8 is a rectangular groove opened along the length of the mounting frame 5, achieving a surface-to-surface fit with the sliding connecting block 6, which also has a rectangular cross-section. Compared with cylindrical guide rails or ball bearing structures, it has higher load-bearing capacity and anti-pollution capacity—even under conditions where compressed air contains trace amounts of oil mist or particulate matter, the rectangular sliding pair is less prone to rolling element embedding or track scratches, ensuring long-term operational reliability. The sliding connecting block 6 is rigidly connected to the second sealing plate 2, so that every displacement of the sealing plate is synchronously guided by the double-sided symmetrical guide mechanism. The double-rail support structure effectively counteracts the torque load caused by the airflow thrust, preventing the sealing plate from warping or wearing on one side during movement.

[0039] In one embodiment, the limiting rod 9 is a cylindrical metal rod with its axis parallel to the width direction of the limiting frame 3. The two ends of the limiting rod 9 are welded and fixed to the outer walls of the two sides of the second sealing plate 2, respectively. The positive pole magnetic plate 10 is an annular permanent magnet, which is sleeved and bonded to the outer periphery of the middle part of the limiting rod 9.

[0040] The fixed baffle 12 is an L-shaped metal plate. Its vertical part is fixed to the surface of the limiting frame 3 away from the first sealing plate 1 by bolts, and its horizontal part extends towards the center of the limiting groove 4. The negative magnetic plate 11 is an annular permanent magnet with the opposite polarity to the positive magnetic plate 10, and is embedded and bonded to the inner side of the horizontal part of the fixed baffle 12.

[0041] In a specific application of this utility model embodiment, when the second sealing plate 2 moves inward along the limiting groove 4 under the thrust of airflow, the cylindrical limiting rods 9 welded and fixed to its outer walls on both sides advance forward synchronously. The axis of the limiting rods 9 is parallel to the width direction of the limiting frame 3, ensuring that they maintain a horizontal posture throughout the movement and align with the fixed baffles 12 located on both sides of the end of the limiting frame 3. Because the limiting rods 9 are made of high-strength metal and are rigidly connected to the sealing plate by welding, they will not bend or loosen when subjected to magnetic impact or air pressure fluctuations, providing a reliable structural foundation for subsequent magnetic positioning.

[0042] As the sealing plate approaches the end of its stroke, the annular positive magnetic plate 10 fitted around the outer periphery of the middle part of the limiting rod 9 gradually approaches the annular negative magnetic plate 11 embedded in the inner side of the horizontal part of the fixed baffle 12. The two permanent magnets are made of highly coercive rare earth materials (such as neodymium iron boron), with opposite polarities and matched dimensions. When the distance between them shrinks to the critical distance (usually 1–3 mm), a strong axial attraction is generated instantly. The magnetic force not only quickly "attracts" the limiting rod 9 to the inner side of the fixed baffle 12, but also achieves multi-point balanced force through annular surface contact, avoiding deflection or impact noise caused by local stress concentration.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0045] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A gas sealing valve plate assembly for an air compressor, characterized in that, include: The limiting frame (3) has a limiting groove (4) that runs through its thickness inside. A first sealing plate (1) is provided on one side of the limiting frame (3). A ventilation hole (13) that runs through its thickness is provided on the first sealing plate (1). The second sealing plate (2) is located inside the limiting groove (4) and slides with the inner wall of the limiting groove (4). The second sealing plate (2) has a mounting plate (16) fixedly provided on the side surface facing the first sealing plate (1). The connecting pipe (14) has one end inserted into the ventilation hole (13) and fixedly connected to the surface of the mounting plate (16), and the other end exposed on the side of the first sealing plate (1) away from the limiting frame (3). The connecting pipe (14) is provided with a filter screen (15).

2. The air compressor gas sealing valve plate assembly according to claim 1, characterized in that, Also includes: Two sets of mounting frames (5) are fixedly set on both sides of the inner wall of the limiting groove (4). Each set of mounting frames (5) has an mounting groove (8) inside. The mounting groove (8) has a sliding connecting block (6) inside. One side of the sliding connecting block (6) is fixedly connected to the outer wall of the second sealing plate (2). The two sides of the sliding connecting block (6) are respectively provided with buffer damping rods (7). The other end of the buffer damping rod (7) is fixedly connected to the inner wall of the mounting groove (8).

3. The air compressor gas sealing valve plate assembly according to claim 2, characterized in that, Also includes: Two limiting rods (9) are provided, which are respectively fixed to the outer walls on both sides of the second sealing plate (2) and located between the two sets of mounting frames (5). A positive magnetic plate (10) is sleeved on the outer periphery of the limiting rods (9). Two fixed baffles (12) are provided, which are respectively fixed on the left and right sides of the surface of the limiting frame (3) away from the first sealing plate (1). The inner wall of the fixed baffle (12) is provided with a negative magnetic plate (11). The positive magnetic plate (10) and the negative magnetic plate (11) are magnetically fixed together when the second sealing plate (2) moves to the limiting position. The height and thickness of the fixed baffle (12) do not interfere with the reciprocating movement of the second sealing plate (2) in the limiting groove (4).

4. The air compressor gas sealing valve plate assembly according to claim 1, characterized in that, The limiting groove (4) is a rectangular groove, and the depth of the limiting groove (4) is greater than the thickness of the second sealing plate (2), so that the second sealing plate (2) has a moving gap along the thickness direction in the limiting groove (4).

5. The air compressor gas sealing valve plate assembly according to claim 1, characterized in that, The ventilation hole (13) is a circular through hole with its axis coinciding with the axis of the connecting pipe (14). The connecting pipe (14) is fixedly connected to the mounting plate (16) by welding or threading, and the inner diameter of the connecting pipe (14) matches the diameter of the ventilation hole (13).

6. The air compressor gas sealing valve plate assembly according to claim 2, characterized in that, The mounting frame (5) is a U-shaped metal frame with its opening facing the center of the limiting groove (4). The mounting groove (8) is a rectangular groove opened along the length of the mounting frame (5). The sliding connecting block (6) is a rectangular block that slides with the mounting groove (8).

7. The air compressor gas sealing valve plate assembly according to claim 3, characterized in that, The limiting rod (9) is a cylindrical metal rod with its axis parallel to the width direction of the limiting frame (3). The two ends of the limiting rod (9) are welded and fixed to the outer walls of the two sides of the second sealing plate (2). The positive magnetic plate (10) is an annular permanent magnet, which is sleeved and bonded to the outer periphery of the middle part of the limiting rod (9).

8. The air compressor gas sealing valve plate assembly according to claim 3, characterized in that, The fixed baffle (12) is an L-shaped metal plate. Its vertical part is fixed to the surface of the limiting frame (3) away from the first sealing plate (1) by bolts, and its horizontal part extends towards the center of the limiting groove (4). The negative pole magnetic plate (11) is an annular permanent magnet with the opposite polarity to the positive pole magnetic plate (10), and is embedded and bonded to the inner side of the horizontal part of the fixed baffle (12).

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