Exhaust gas recovery device for air compressor

Abstract

The utility model discloses a kind of residual gas recovery devices for air compressor, belong to air compressor technical field, device includes connecting block one, collecting bucket and connecting pipe, connecting block one is equipped with recovery gas path, conical block is slidably installed in gas path, and conical block is pre-pressed by disc spring, device is equipped with pressure regulating mechanism, mechanism includes cylinder and adjusting plate slidably arranged in the sliding slot of connecting block one, cylinder drives adjusting plate to abut disc spring, by changing the pre-pressure of disc spring, the opening pressure threshold of conical block is dynamically adjusted, device is also equipped with sealing fixing mechanism, for the quick fixing of connecting pipe and connecting block one.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a residual gas recovery device for air compressors. Background Technology

[0002] Air compressors, as indispensable key power equipment in modern industrial production, primarily function to provide high-pressure gas. During daily operation, especially during equipment start-up and shutdown, drastic load fluctuations, or when system pipeline pressure reaches its set upper limit, the control system discharges a portion of excess compressed air directly into the atmosphere via safety valves or unloading valves to protect equipment safety and maintain system pressure stability. While this process ensures stable system operation, the directly discharged high-pressure gas itself contains energy, thus resulting in significant energy waste.

[0003] In response to the call for energy conservation and emission reduction, the industry has gradually developed waste gas recovery devices for air compressors. These devices typically operate by installing a spring-controlled pressure valve on the air compressor's exhaust pipe. When the exhaust pressure exceeds the spring's preload, the valve automatically opens, guiding the excess high-pressure gas into a dedicated collection tank for storage and later use. This method reduces direct energy waste to some extent.

[0004] However, in-depth practical application has revealed that existing residual gas recovery devices generally suffer from significant structural defects. The opening pressure threshold of their pressure valves is typically preset during installation via mechanical means, such as manually adjusting the screw's insertion depth to change the spring's preload. This adjustment method is not only cumbersome and requires tools, but also makes it difficult to flexibly change the setting based on variations in operating conditions during equipment operation.

[0005] When production processes, gas demand, or environmental conditions change, requiring new and optimized recovery pressure points, operators must shut down the equipment and perform complex manual recalibration. This not only severely impacts production continuity and overall efficiency, but also, if adjustments are not made in a timely manner, the fixed pressure threshold will significantly reduce recovery effectiveness, failing to achieve optimal energy savings. Summary of the Invention

[0006] In view of the problems existing in the technology of residual gas recovery devices for air compressors, such as cumbersome adjustment of recovery pressure threshold, need for manual calibration after shutdown, and low recovery efficiency due to difficulty in adapting to changing working conditions, this utility model aims to provide an air compressor residual gas recovery device with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a residual gas recovery device for an air compressor, comprising: a body, a collection tank, a connecting block, a connecting pipe, a conical block, a disc spring; and a pressure regulating mechanism.

[0008] The pressure regulating mechanism includes a cylinder and an adjusting plate. The pressure regulating mechanism is the core of realizing flexible and adjustable recovery pressure. A groove is specially provided on the connecting block to allow the adjusting plate to slide smoothly in it. The output end of the cylinder is fixedly connected to the adjusting plate, so that the adjusting plate can be directly and linearly driven to slide back and forth in the groove through the extension and retraction of the cylinder.

[0009] Furthermore, a precise mechanical transmission and adjustment relationship is formed between the adjusting plate, the disc spring, and the conical block. The adjusting plate is always in contact with the end of the disc spring furthest from the conical block, while the other end of the disc spring is in contact with the conical block. By controlling the precise position of the adjusting plate in the slide groove through the cylinder, the initial compression of the disc spring can be actively changed. This structure makes the adjustment of the disc spring preload no longer require mechanical disassembly, but transforms it into an automated process that can be controlled by external signals. This directly changes the preload applied to the conical block, achieving online and dynamic adjustment of the upper limit of the recovery pressure trigger.

[0010] Preferably, in order to improve the sealing performance when the valve is closed, a sealing ring is provided around the outer periphery of the conical block, and a sealing groove is provided on the inner wall of the recovery gas passage of the connecting block one at the position that cooperates with the conical block when closing the recovery gas passage to accommodate the sealing ring, thus ensuring zero leakage under high pressure.

[0011] Preferably, the residual gas recovery device for air compressors also includes a sealing and fixing mechanism for detachably fixing the connecting pipe to the outer wall of the connecting block one. The sealing and fixing mechanism consists of a semi-circular ring one and a semi-circular ring two that are hinged to each other, and a fixing component for locking the two together. The overall structure is compact and designed for quick assembly and disassembly.

[0012] In a further preferred embodiment, in order to achieve quick and accurate positioning during the installation process, a round block is fixedly connected to the end of the connecting pipe near the connecting block one, and a fixing groove for accurately engaging the round block is correspondingly opened on the inner wall of the semi-circular ring one, ensuring the consistency of the position each time it is installed.

[0013] Preferably, to ensure a foolproof end-face seal at the connection, an installation groove is provided on the outer wall of the connecting block one, and an elastic sealing gasket is embedded in the installation groove. After the connecting pipe is positioned by the round block and the fixing groove, the sealing gasket can elastically abut against the end face of the connecting pipe, forming a reliable sealing interface under the action of locking force.

[0014] Preferably, the fixing component includes a second connecting block fixed to the outer wall of the semi-circular ring and a U-shaped block rotatably connected to the second connecting block, providing a stable mounting base and movable operating parts for the entire locking operation.

[0015] In a further preferred embodiment, to achieve efficient locking and unlocking, an L-shaped block is fixedly connected to the outer wall of the semicircular ring two. A hollow block is rotatably connected to the inner side of the opening of the U-shaped block. By moving the U-shaped block, the hollow block can be easily engaged with or disengaged from the L-shaped block, thus completing the switching between locking and unlocking.

[0016] Preferably, in order to apply sufficient locking force to resist high pressure, the U-shaped block is provided with a handle at the end away from its axis of rotation. By tightening the handle, a strong clamping force can be generated between the hollow block and the L-shaped block using the lever principle. This force is transmitted to the two semi-circular rings, thereby firmly closing and locking them.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model solves the problem of fixed recovery pressure threshold and inconvenient adjustment in the prior art of residual gas recovery devices by setting a pressure adjustment mechanism that drives the adjustment plate by a cylinder to change the pre-pressure of the disc spring. It achieves the technical effect of being able to conveniently and accurately adjust the upper limit of the recovery pressure remotely, thereby improving the automation level and adaptability of the device.

[0019] 2. This utility model solves the problems of complex connection structure and cumbersome and laborious disassembly and assembly of the device and the body in the prior art by setting a sealing and fixing mechanism composed of mutually cooperating semi-circular rings and quick locking components composed of U-shaped blocks, L-shaped blocks, etc., thereby achieving the technical effect of enabling quick installation and disassembly, simple operation, and significantly improving installation and maintenance efficiency.

[0020] 3. This utility model integrates the pressure regulating mechanism with the quick-connect sealing and fixing mechanism, and uses a reliable valve structure composed of a conical block and a sealing ring. This solves the problems of single function, loose structure, and inconvenient operation of existing technology devices, and achieves the dual advantages of compact and reasonable overall structure, stable and reliable performance, flexible pressure adjustment and convenient installation and maintenance, thus improving the overall practicality of the product. Attached Figure Description

[0021] Figure 1 This is a perspective view of a residual gas recovery device for an air compressor proposed in this utility model;

[0022] Figure 2 This is a structural exploded view of a residual gas recovery device for an air compressor proposed in this utility model;

[0023] Figure 3 This is a partial structural cross-sectional view of a residual gas recovery device for an air compressor proposed in this utility model;

[0024] Figure 4 This is a partial structural exploded view of a residual gas recovery device for an air compressor proposed in this utility model;

[0025] Figure 5 This utility model proposes a waste gas recovery device for air compressors. Figure 4 Enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Body; 2. Collection bucket; 3. Connecting pipe; 4. Pressure regulating mechanism; 401. Connecting block one; 402. Cylinder; 403. Adjusting plate; 404. Slide groove; 405. Disc spring; 406. Conical block; 407. Sealing ring; 408. Sealing groove; 5. Sealing fixing mechanism; 501. Semicircular ring one; 502. Semicircular ring two; 503. Round block; 504. Fixing groove; 505. Mounting groove; 506. Sealing gasket; 507. Fixing component; 5071. Connecting block two; 5072. U-shaped block; 5073. Hollow block; 5074. L-shaped block. Detailed Implementation

[0028] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Example:

[0030] Please refer to Figures 1 to 5 This utility model provides a residual gas recovery device for air compressors, which aims to solve the problems of inconvenient pressure threshold adjustment and cumbersome connection and disassembly between the device and the machine body, resulting in low maintenance efficiency in the existing technology.

[0031] like Figure 1 and Figure 2 As shown, the residual gas recovery device for air compressors includes a body 1 and a recovery device main body installed on the body 1. The recovery device main body includes a connecting block 401 as a connecting component, a collection tank 2 for storing recovered gas, and a connecting pipe 3 connecting the two. One end of the connecting block 401 is fixedly connected to the exhaust port of the body 1. A through recovery gas passage is opened inside the connecting block 401. One end of the connecting pipe 3 is connected to the collection tank 2, and the other end is connected to the other end of the connecting block 401, so that the residual gas discharged from the body 1 can enter the collection tank 2 through the recovery gas passage and the connecting pipe 3.

[0032] Please refer to Figure 3 and Figure 4Inside the recovery gas passage of connecting block 401, a conical block 406 is slidably installed along its axis. The conical block 406 is used to generate axial displacement under the action of air pressure, thereby realizing the opening or closing of the recovery gas passage. A disc spring 405 is also sleeved inside the recovery gas passage. The disc spring 405 always abuts against the conical block 406 and applies a pre-pressure to the conical block 406 to make it tend to close the recovery gas passage. The magnitude of the pre-pressure determines the minimum gas pressure required to open the recovery gas passage.

[0033] The technical solution of this embodiment is to set up a pressure regulating mechanism 4. The pressure regulating mechanism 4 can conveniently adjust the pre-pressure applied by the disc spring 405 to the conical block 406. The pressure regulating mechanism 4 includes a cylinder 402 and an adjusting plate 403. The outer surface of the connecting block 401 is integrally formed with a slide groove 404. The adjusting plate 403 is slidably disposed inside the slide groove 404. The output end of the cylinder 402 is fixedly connected to the adjusting plate 403. When the cylinder 402 is activated, its output end can drive the adjusting plate 403 to slide back and forth along the length direction of the slide groove 404. The side of the adjusting plate 403 always abuts against the end of the disc spring 405 away from the conical block 406. Therefore, by controlling the cylinder 402 to drive the adjusting plate 403 to move and stop in different positions within the slide groove 404, the initial compression state of the disc spring 405 can be changed, thereby directly changing the pre-pressure applied to the conical block 406, thus realizing flexible and precise adjustment of the upper limit of the residual gas recovery pressure trigger.

[0034] Please refer to Figure 3 and Figure 5 A groove is formed on the outer circumferential surface of the conical block 406, and a sealing ring 407 is embedded in the groove. Correspondingly, on the inner wall of the recovery gas passage of the connecting block 401, a sealing groove 408 is formed precisely at the position where the sealing ring 407 is when the conical block 406 closes the recovery gas passage. When the conical block 406 is in the closed position under the elastic force of the disc spring 405, the sealing ring 407 is perfectly embedded in the sealing groove 408. Through the interference fit between the two, the recovery gas passage can be ensured to have excellent airtightness in the closed state, effectively preventing gas leakage.

[0035] Another technical solution in this embodiment is that the residual gas recovery device for the air compressor also includes a set of ingenious sealing and fixing mechanisms 5. The sealing and fixing mechanisms 5 are used to achieve a quick, reliable, and detachable connection between the connecting pipe 3 and the connecting block 401. Please refer to... Figure 2 , Figure 4 and Figure 5 The structure will be explained in detail below:

[0036] The sealing and fixing mechanism 5 includes two main components, namely semi-circular ring one 501 and semi-circular ring two 502. Semi-circular ring one 501 and semi-circular ring two 502 are connected together by hinge, so that they can open or close like a clam shell. In the closed state, the two together form a complete ring structure, which is used to surround and hold the connection between the connecting pipe 3 and the connecting block one 401. In order to achieve precise positioning, a protruding round block 503 is fixedly connected to the end of the connecting pipe 3 near the connecting block one 401. The inner wall of the semi-circular ring one 501 is correspondingly provided with a fixing groove 504 for engaging the round block 503. During installation, the round block 503 is first placed into the fixing groove 504 to complete the initial axial and radial positioning.

[0037] To ensure the sealing performance at the connection, a mounting groove 505 is formed on the outer wall of the connecting block 401. An elastic sealing gasket 506 is embedded in the mounting groove 505. When the connecting pipe 3 is positioned by the round block 503 and the fixing groove 504, the end face of the sealing gasket 506 will elastically abut against the end face of the connecting pipe 3. After being pressed by external force, a reliable end face seal is formed, effectively eliminating the risk of compressed air leakage from the connection gap.

[0038] Based on the above embodiments, in order to securely lock the first semicircular ring 501 and the second semicircular ring 502, the sealing and fixing mechanism 5 of this utility model further includes a set of high-efficiency fixing components 507.

[0039] As a preferred embodiment, please refer to Figure 2 and Figure 4 The fixing component 507 includes a second connecting block 5071 and a U-shaped block 5072. The second connecting block 5071 is firmly fixed to the outer wall of the first semi-circular ring 501 by welding or bolt connection, providing a stable mounting base for the subsequent locking mechanism. The U-shaped block 5072 is rotatably connected to the second connecting block 5071 by a pin, allowing it to swing around the pin at a certain angle.

[0040] For further optimization of the above locking mechanism, please refer to... Figure 4 and Figure 5 An L-shaped block 5074 is fixedly connected to the outer wall of the second semicircular ring 502. The protruding end of the L-shaped block 5074 forms a flange for hooking. At the same time, a hollow block 5073 is rotatably connected to the inner side of the opening of the U-shaped block 5072 through another pin. When locking is required, the second semicircular ring 502 is closed first, and then the U-shaped block 5072 is moved so that the hollow block 5073 on it passes over and hooks onto the flange of the L-shaped block 5074, forming a preliminary lock.

[0041] As the final guarantee for the locking effect, the end of the U-shaped block 5072 away from its pivot is integrally formed or fixedly connected with an easy-to-operate handle. After the hollow block 5073 hooks onto the L-shaped block 5074, the handle can be pressed or tightened to generate a huge clamping force between the hollow block 5073 and the L-shaped block 5074 by using the lever principle and the principle of eccentric locking. This clamping force is transmitted to the semi-circular ring 502 and the semi-circular ring 501 through the L-shaped block 5074 and the U-shaped block 5072 respectively, thereby firmly pressing and closing the two to ensure the reliability of the entire connection structure.

[0042] Working principle: When the machine body 1 discharges excess compressed air during start-up, low-load operation, or when the pressure is too high, the excess air compresses the disc spring 405 through the conical block 406. At this time, the sealing ring 407 of the conical block 406 disengages from the sealing groove 408 of the connecting block 401. The excess air enters the collection tank 2 through the connecting pipe 3 of the sealing and fixing mechanism 5. After the excess air is discharged, the disc spring 405 drives the sealing ring 407 outside the conical block 406 to engage in the sealing groove 408. When it is necessary to adjust the upper limit of pressure, the cylinder 402 of the pressure adjustment mechanism 4 is activated. The cylinder 402 drives the adjusting plate 403 to slide in the slide groove 404 of the connecting block 401. The adjusting plate 403 drives the disc spring 405 to squeeze the conical block 406. The cylinder 402 can directly change the pre-pressure of the disc spring 405 on the conical block 406, thereby adjusting the upper limit of the pressure trigger for excess air recovery.

[0043] Before operation, place the round block 503 of the outer connecting pipe 3 of the collection bucket 2 into the fixing groove 504 of the semi-circular ring 501 outside the connecting block 401. At this time, the sealing gasket 506 in the mounting groove 505 of the connecting block 401 is tightly attached to the connecting pipe 3 to complete the seal. Then, rotate the upper semi-circular ring 502 of the semi-circular ring 501 to close it. Finally, rotate the U-shaped block 5072 on the inner side of the connecting block 5071 outside the semi-circular ring 501 so that the hollow block 5073 on the inner side of the U-shaped block 5072 hangs on the L-shaped block 5074 of the semi-circular ring 502. Press the handle outside the U-shaped block 5072 to further tighten the U-shaped block 5072. With the help of the clamping force of the hollow block 5073 and the L-shaped block 5074, the fixing component 507 can firmly close the semi-circular ring 501 and the semi-circular ring 502, so that the connecting pipe 3 is fixed to the outer wall of the connecting block 401.

Claims

1. A waste gas recovery device for an air compressor, comprising: Body (1); Collection bucket (2); Connecting block 1 (401), one end of which is fixedly connected to the exhaust port of the body (1), and a through-flow recovery gas path is provided inside; connecting pipe (3), one end of which is connected to the collection bucket (2), and the other end is connected to the other end of the connecting block 1 (401) for connecting the recovery gas path. A conical block (406) is slidably mounted along its axial direction in the recovery air passage of the connecting block (401) for opening or closing the recovery air passage under air pressure; a disc spring (405) is disposed in the recovery air passage and always applies a pre-pressure to the conical block (406) to tend to close the recovery air passage; The feature is that it further includes a pressure regulating mechanism (4), which includes a cylinder (402) and an adjusting plate (403); The connecting block (401) is provided with a sliding groove (404) for the adjusting plate (403) to slide, and the adjusting plate (403) is slidably disposed in the sliding groove (404); The output end of the cylinder (402) is fixedly connected to the adjusting plate (403) to drive the adjusting plate (403) to slide along the slide groove (404); The adjusting plate (403) abuts against the end of the disc spring (405) away from the conical block (406) to adjust the compression of the disc spring (405) by changing its own position, thereby changing the preload applied to the conical block (406).

2. The residual gas recovery device for an air compressor according to claim 1, characterized in that, A sealing ring (407) is provided around the outer periphery of the conical block (406). On the inner wall of the recovery gas passage of the connecting block (401), a sealing groove (408) is provided at a position that cooperates with the conical block (406) when the recovery gas passage is closed, for accommodating the sealing ring (407).

3. The residual gas recovery device for an air compressor according to claim 1, characterized in that, It also includes a sealing and fixing mechanism (5) for detachably fixing the connecting pipe (3) to the outer wall of the connecting block (401). The sealing and fixing mechanism (5) includes a semi-circular ring (501) and a semi-circular ring (502) that are hinged to each other, and a fixing component (507) for locking the two together.

4. The residual gas recovery device for an air compressor according to claim 3, characterized in that, A circular block (503) is fixedly connected to the end of the connecting pipe (3) near the end of the connecting block (401), and a fixing groove (504) for engaging the circular block (503) is correspondingly provided on the inner wall of the semi-circular ring (501).

5. The residual gas recovery device for an air compressor according to claim 4, characterized in that, An installation groove (505) is provided on the outer wall of the connecting block (401), and a sealing gasket (506) is embedded in the installation groove (505). When the connecting pipe (3) is positioned by the round block (503) and the fixing groove (504), the sealing gasket (506) elastically abuts against the end face of the connecting pipe (3) to form a seal.

6. The residual gas recovery device for an air compressor according to claim 3, characterized in that, The fixing component (507) includes: a second connecting block (5071), which is fixed to the outer wall of the first semicircular ring (501), and a U-shaped block (5072), which is rotatably connected to the second connecting block (5071).

7. The residual gas recovery device for an air compressor according to claim 6, characterized in that, An L-shaped block (5074) is fixedly connected to the outer wall of the second semicircular ring (502). A hollow block (5073) is rotatably connected to the inner side of the opening of the U-shaped block (5072). When the U-shaped block (5072) rotates, the hollow block (5073) can hook onto or detach from the L-shaped block (5074) to achieve locking or unlocking.

8. The residual gas recovery device for an air compressor according to claim 7, characterized in that, The U-shaped block (5072) has a handle at one end away from its pivot. By tightening the U-shaped block (5072), a clamping force is generated between the hollow block (5073) and the L-shaped block (5074), thereby firmly closing the first semicircular ring (501) and the second semicircular ring (502).

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