Dual-purpose inflator pump housing safety pressure relief mechanism

Abstract

The utility model relates to the technical field of air pump accessories discloses a dual -purpose safety pressure -relief mechanism of pump shell of inflator pump, its installation is in the inflator pump shell, including pressure relief short -tube, the inside of short -tube is provided with pressure relief subassembly and tightness adjusting assembly, and pressure relief subassembly contains elastic plug, mounting bracket, return spring and top cap, and tightness adjusting assembly contains the taper thread hole of top cap and is screwed with the taper thread rod of thread cooperation, and the end of screw rod extends into the inside of elastic plug, and mounting bracket fixedly connected in the inside of short -tube, and elastic plug slidingly cooperated in short -tube inner wall, and return spring connects elastic plug with mounting bracket. The utility model has realized the automatic pressure relief and automatic reset sealing after pressure relief of inflator pump pump shell inside, and through the depth of adjusting taper thread rod screwing in simultaneously, can conveniently adjust the tightness of sealing to make up the sealing element wear and tear, effectively improved the reliability and service life of inflator pump, and the taper thread hole can also be used as convenient oil channel.

Description

Technical Field

[0001] This utility model relates to the field of air pump accessories technology, and in particular to a safety pressure relief mechanism for a dual-purpose air pump casing. Background Technology

[0002] Air pumps are a common inflation tool widely used in daily life and industrial production. During operation, improper operation (such as the operator directly injecting high pressure from the air inlet) can cause the pump casing to generate and withstand high gas pressure. If the pressure exceeds the structural bearing capacity for an extended period, there is a risk of explosion and component damage.

[0003] To prevent the aforementioned dangers, existing technologies typically incorporate a safety relief mechanism, such as a simple safety valve, into the pump casing of the air pump. This type of mechanism usually utilizes the preload of a spring to press against a valve core. When the thrust generated by the internal pressure exceeds the spring preload, the valve core is pushed open, releasing pressure and thus protecting the pump casing.

[0004] However, existing safety pressure relief mechanisms of this type have revealed shortcomings in practical use. They cannot cope with excessively high gas pressures that may be introduced due to misoperation, and mismatched pressure relief can still damage the equipment. Furthermore, their sealing performance and pressure relief accuracy are typically set at the factory, relying on the initial state of the seals and the spring's recoil force. With prolonged use, the seals wear or age due to repeated movement and environmental corrosion, leading to decreased sealing performance and leakage even under normal operating pressure, affecting the pump's efficiency. Additionally, users cannot easily fine-tune the seal tightness based on actual operating conditions or seal wear, and once a sealing problem occurs, disassembly and replacement of parts are often necessary, resulting in poor maintainability and adaptability.

[0005] Therefore, this utility model proposes a safety pressure relief mechanism for the pump casing of a dual-purpose air pump to overcome the shortcomings of the prior art. Utility Model Content

[0006] In view of the problems in the existing technology of a dual-purpose air pump housing safety pressure relief mechanism, the sealing performance cannot be adjusted after wear, resulting in reduced air tightness, poor reliability, and inconvenient maintenance. The present invention aims to provide a dual-purpose air pump housing safety pressure relief mechanism with an improved structure that can effectively solve the above problems.

[0007] This utility model provides a safety pressure relief mechanism for a dual-purpose air pump housing, which is installed on the air pump housing and includes: a pressure relief short pipe, and a pressure relief component and a tension adjustment component disposed inside the pressure relief short pipe.

[0008] The pressure relief assembly includes an elastic plug, a mounting bracket, a return spring, and a top cover, while the tension adjustment assembly includes a tapered threaded hole and a tapered threaded rod that is threaded into the tapered threaded hole.

[0009] Furthermore, the mounting bracket is fixedly connected to the inside of the pressure relief short pipe, the elastic plug is slidably fitted to the inner wall of the pressure relief short pipe, the two ends of the return spring are respectively connected to the mounting bracket and the elastic plug, and the top cover is fixedly connected to the end of the pressure relief short pipe away from the mounting bracket. The top cover has a tapered thread hole, and the end of the tapered thread rod extends into the interior of the elastic plug.

[0010] Preferably, the outer periphery of the elastic plug is provided with at least one annular groove, and a sealing ring is installed in the annular groove, the sealing ring being in elastic contact with the inner wall of the pressure relief short pipe.

[0011] Preferably, the mounting bracket includes a central connecting portion and a plurality of support arms extending radially from the central connecting portion, one end of the return spring is connected to the central connecting portion, the outer end of the support arm is fixedly connected to the inner wall of the pressure relief short pipe, and a channel for gas to flow is formed between the plurality of support arms.

[0012] Preferably, the fixed connection between the mounting bracket and the inner wall of the pressure relief short pipe is an interference fit connection or a threaded connection.

[0013] Preferably, the head of the tapered threaded rod is fixedly connected to a round cap, and the round cap has a cross groove for screwing operation.

[0014] Preferably, the elastic plug has a tapered inner hole at one end facing the tapered threaded rod that matches the shape of the tapered threaded rod. During the screwing process, the tapered rod of the tapered threaded rod exerts a radial expansion effect on the tapered inner hole of the elastic plug.

[0015] Preferably, the reset spring is a tension spring.

[0016] Preferably, the tapered threaded hole can serve as an oil injection channel after the tapered threaded rod is unscrewed. This utility model has the following beneficial effects: 1. This utility model solves the problem that existing air pumps lack effective overpressure protection for the pump casing or that the pressure relief mechanism cannot automatically and reliably reset after pressure relief by setting an elastic plug that can slide inside the pressure relief short pipe and using a return spring to connect it to a mounting bracket fixed inside the pressure relief short pipe. It achieves the technical effect of automatically relieving pressure when the internal pressure of the pump casing is too high and automatically resetting the seal after the pressure returns to normal, thereby improving the overall safety and reliability of the air pump.

[0017] 2. This utility model solves the problem of fixed performance of existing air pump sealing structures, which cannot be adjusted according to wear during use, and thus reduces air tightness. It achieves the technical effect of conveniently adjusting the tightness of the sealing mechanism, effectively compensating for the wear of the sealing components, and extending the service life of the equipment. By setting a tapered threaded rod that cooperates with the tapered hole inside the elastic plug, the depth of thread insertion is used to change the radial expansion degree of the elastic plug, thereby adjusting the sealing force of the sealing ring.

[0018] 3. This utility model solves the problem of existing air pumps requiring disassembly for internal lubrication by designing the tapered threaded hole in the tension adjustment component as an oil injection channel after the tapered threaded rod is unscrewed. This achieves the technical effect of integrating a convenient oil injection channel without adding extra parts, simplifying the equipment structure and facilitating later maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a safety pressure relief mechanism for a dual-purpose air pump housing proposed in this utility model. Figure 2 This is a top view of the safety pressure relief mechanism for the casing of a dual-purpose air pump proposed in this utility model. Figure 3 This is a schematic diagram of the pressure relief component of a safety pressure relief mechanism for a dual-purpose air pump housing proposed in this utility model. Figure 4 This is a schematic diagram of the mounting frame for a safety pressure relief mechanism for a dual-purpose air pump housing proposed in this utility model. Figure 5 This is a schematic diagram of the tension adjustment component of a safety pressure relief mechanism for a dual-purpose air pump housing proposed in this utility model.

[0020] Legend: 1. Air pump housing; 2. Pressure relief short pipe; 3. Pressure relief assembly; 301. Mounting bracket; 302. Elastic plug; 303. Sealing ring; 304. Return spring; 305. Top cover; 4. Tightness adjustment assembly; 401. Tapered threaded hole; 402. Tapered threaded rod; 403. Round cap; 404. Cross groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Example

[0022] Please refer to Figures 1 to 5 This utility model provides a safety pressure relief mechanism for the housing of a dual-purpose air pump, which aims to solve the problems of complex structure, insufficient reset reliability and unadjustable sealing performance of the pressure relief mechanism in the prior art.

[0023] like Figure 1 and Figure 2 As shown, the dual-purpose air pump housing safety pressure relief mechanism is installed on the air pump housing 1, including a pressure relief short pipe 2. The pressure relief short pipe 2 is provided with a pressure relief component 3 and a tension adjustment component 4. The pressure relief component 3 provides the basic structure for realizing automatic pressure relief and reset, while the tension adjustment component 4 provides a way to adjust the sealing performance and provide an oil injection channel. The pressure relief component 3 includes an elastic plug 302, a mounting bracket 301, a reset spring 304, and a top cover 305. In the pressure relief assembly 3, the mounting bracket 301 is fixedly connected to the inside of the pressure relief short pipe 2, providing a stable base for the entire assembly. The elastic plug 302 is installed on the inner wall of the pressure relief short pipe 2 in a sliding fit manner, and can reciprocate along the axial direction of the pressure relief short pipe 2 under the action of gas pressure. The two ends of the return spring 304 are respectively connected to the mounting bracket 301 and the elastic plug 302, and are used to pull the elastic plug 302 back to the initial sealing position after the pressure relief is completed. The top cover 305 is fixedly connected to the end of the pressure relief short pipe 2 away from the mounting bracket 301. The presence of the top cover 305 is used to limit the range of motion of the elastic plug 302 and prevent it from coming out of the pressure relief short pipe 2 under excessive pressure.

[0024] To solve the above-mentioned technical problems, the dual-purpose air pump housing safety pressure relief mechanism achieves the dual functions of automatic pressure relief and adjustable sealing performance through the specific structural cooperation and connection relationship formed between the pressure relief component 3 and the tightness adjustment component 4.

[0025] Please refer to the following carefully. Figures 3 to 5 The structure will be described in detail below: The structure of the tension adjustment assembly 4 provides a basis for adjusting the sealing performance. The tension adjustment assembly 4 includes a tapered threaded hole 401 on the top cover 305 and a tapered threaded rod 402 that threadedly engages with the tapered threaded hole 401. A round cap 403 is fixedly connected to the head of the tapered threaded rod 402. The round cap 403 has a cross groove 404 for tightening. In the assembled state, the end of the tapered threaded rod 402 extends into the interior of the elastic plug 302. The elastic plug 302 has a [missing information - likely a design feature] facing one end of the tapered threaded rod 402. The tapered inner hole is adapted to the shape of the tapered threaded rod 402. When the tapered threaded rod 402 is screwed into the tapered inner hole along its axial direction, its tapered rod body exerts a radial expansion effect on the tapered inner hole of the elastic plug 302. This radial expansion effect further compresses the sealing ring 303 on the outer periphery of the elastic plug 302, enhancing its tightness of contact with the inner wall of the pressure relief short pipe 2. At least one annular groove is provided on the outer periphery of the elastic plug 302, and the sealing ring 303 is installed in the annular groove and forms a sealing contact with the inner wall of the pressure relief short pipe 2 through its own elasticity.

[0026] Meanwhile, the mounting bracket 301 provides a stable and reliable mounting base for the return spring 304. The mounting bracket 301 includes a central connecting part and multiple support arms extending radially from the central connecting part. One end of the return spring 304 is connected to the central connecting part, and the other end is connected to the elastic plug 302. The return spring 304 is a tension spring. The outer ends of the multiple support arms of the mounting bracket 301 are fixedly connected to the inner wall of the pressure relief short pipe 2, and a channel for gas to flow is formed between the multiple support arms. This structure ensures the stability of the installation and avoids obstruction of the pressure relief airflow.

[0027] Based on the above embodiments, the present invention may further include the following preferred technical solutions: As a preferred embodiment, for achieving a reliable seal, please refer to... Figure 3 The elastic plug 302 has at least one annular groove on its outer periphery, and a sealing ring 303 is installed in the annular groove. The sealing ring 303 forms elastic contact with the inner wall of the pressure relief short pipe 2. In this embodiment, two sealing rings 303 are provided on the outer periphery of the elastic plug 302 to enhance the reliability of the seal.

[0028] As another preferred embodiment, please refer to Figure 4 The specific structure of the mounting bracket 301 is as follows: it includes a central connecting part and multiple support arms extending radially from the central connecting part. One end of the return spring 304 is connected to the central connecting part. The outer ends of the multiple support arms are fixedly connected to the inner wall of the pressure relief short pipe 2, and a channel for gas to flow is formed between the multiple support arms. The fixed connection between the mounting bracket 301 and the inner wall of the pressure relief short pipe 2 is an interference fit connection or a threaded connection.

[0029] As another preferred embodiment, please refer to Figure 5 To facilitate adjustment, a round cap 403 is fixedly connected to the head of the tapered threaded rod 402, and a cross groove 404 for screwing is provided on the round cap 403.

[0030] As another preferred embodiment, in order to adjust the tightness of the seal, the elastic plug 302 has a tapered inner hole at one end facing the tapered threaded rod 402 that matches the shape of the rod body of the tapered threaded rod 402. When the tapered threaded rod 402 is screwed into the tapered inner hole along its axial direction, its tapered rod body exerts a radial expansion effect on the tapered inner hole of the elastic plug 302.

[0031] In another preferred embodiment, the return spring 304 is a tension spring that stores elastic potential energy when the elastic plug 302 is pushed out and provides a restoring force to pull the elastic plug 302 back after the internal pressure decreases.

[0032] As another preferred embodiment, the tapered threaded hole 401 can serve as an oil injection channel after the tapered threaded rod 402 is unscrewed, facilitating the lubrication of internal moving parts.

[0033] The working principle of the safety pressure relief mechanism for the pump casing of this utility model dual-purpose air pump is as follows: When the internal pressure of the air pump housing 1 is too high, the high-pressure gas pushes the elastic plug 302 upward through the pressure relief short pipe 2. Since the elastic plug 302 and the inner wall of the pressure relief short pipe 2 are in sliding fit, the elastic plug 302 will move upward. During this process, the return spring 304 connected between the elastic plug 302 and the mounting bracket 301 is stretched. When the elastic plug 302 rises to the point where its outer sealing ring 303 disengages from the sealing contact position with the inner wall of the pressure relief short pipe 2, the high-pressure gas flows out through the gap between the elastic plug 302 and the inner wall of the pressure relief short pipe 2. The gas is ejected and discharged through the channel formed between the multiple support arms of the mounting bracket 301, achieving rapid pressure relief. During the pressure relief process, the top cover 305 limits the elastic plug 302 to prevent it from falling out, while the return spring 304 always applies tension to it. When the internal pressure drops to a safe value, the gas pressure pushing the elastic plug 302 decreases. Under the contraction tension of the return spring 304, the elastic plug 302 is pulled back to its initial position, and the sealing ring 303 re-fits against the inner wall of the pressure relief short pipe 2, completing the sealing and automatic reset.

[0034] When it is necessary to adjust the sealing performance, the cross groove 404 on the round cap 403 can be operated with a tool to screw on the tapered threaded rod 402. When the tapered threaded rod 402 is screwed into the tapered threaded hole 401 on the top cover 305 and penetrates into the tapered inner hole of the elastic plug 302, its tapered rod body generates a radial expansion effect on the tapered inner hole of the elastic plug 302. This expansion effect causes the elastic plug 302 to expand outward, thereby pressing the sealing ring 303 more tightly and making it fit more tightly with the inner wall of the pressure relief short pipe 2, so as to enhance the sealing performance. Screwing the tapered threaded rod 402 outward reduces the radial expansion effect and reduces the sealing performance. When the tapered threaded rod 402 is completely screwed out, the exposed tapered threaded hole 401 can be used as an oil injection channel.

[0035] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A safety pressure relief mechanism for a dual-purpose air pump casing, which is installed on the air pump casing (1) and includes a pressure relief short pipe (2), characterized in that, The pressure relief short pipe (2) is equipped with a pressure relief component (3) and a tension adjustment component (4). The pressure relief assembly (3) includes an elastic plug (302), a mounting bracket (301), a return spring (304), and a top cover (305); The mounting bracket (301) is fixedly connected to the inside of the pressure relief short pipe (2), the elastic plug (302) is slidably fitted to the inner wall of the pressure relief short pipe (2), and the two ends of the return spring (304) are respectively connected to the mounting bracket (301) and the elastic plug (302). The top cover (305) is fixedly connected to the end of the pressure relief short pipe (2) away from the mounting bracket (301) and is used to limit the range of motion of the elastic plug (302); The tension adjustment assembly (4) includes a tapered threaded hole (401) opened on the top cover (305) and a tapered threaded rod (402) threaded with the tapered threaded hole (401), the end of the rod of the tapered threaded rod (402) extending into the interior of the elastic plug (302).

2. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: At least one annular groove is provided on the outer periphery of the elastic plug (302), and a sealing ring (303) is installed in the annular groove. The sealing ring (303) is in elastic contact with the inner wall of the pressure relief short pipe (2).

3. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: The mounting bracket (301) includes a central connecting portion and a plurality of support arms extending radially from the central connecting portion. One end of the return spring (304) is connected to the central connecting portion. The outer ends of the support arms are fixedly connected to the inner wall of the pressure relief short pipe (2), and a channel for gas to flow is formed between the plurality of support arms.

4. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 3, characterized in that: The head of the tapered threaded rod (402) is fixedly connected to a round cap (403), and the round cap (403) has a cross groove (404) for screwing operation.

5. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: The elastic plug (302) has a tapered inner hole at one end facing the tapered threaded rod (402) that matches the shape of the rod body of the tapered threaded rod (402). When the tapered threaded rod (402) is screwed into the tapered inner hole along its axial direction, its tapered rod body exerts a radial expansion effect on the tapered inner hole of the elastic plug (302).

6. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: The reset spring (304) is a tension spring.

7. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: The tapered threaded hole (401) can serve as an oil injection channel after the tapered threaded rod (402) is screwed out.

8. The safety pressure relief mechanism for the casing of a dual-purpose air pump according to claim 1, characterized in that: The fixed connection between the mounting bracket (301) and the inner wall of the pressure relief short pipe (2) is an interference fit connection or a threaded connection.

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