Adjustable precise pressure release valve

Abstract

The utility model discloses an adjustable precise pressure release valve which comprises an air inlet end, a non-return gasket, a compression spring and an adjusting screw rod, the non-return gasket is arranged in the air inlet end and tightly attached to the air inlet end, and the compression spring is arranged in the air inlet end and arranged at one end of the non-return gasket in a sleeved mode. A sliding block is further arranged in the air inlet end, and the sliding block is arranged in the air inlet end in a sliding mode. The adjusting screw rod and the sliding block are in threaded connection and rotate relatively, and a rear cover is fixedly installed at the tail end of the air inlet end. The utility model belongs to the technical field of pressure release valves, and particularly relates to a pressure release valve, which is characterized in that an adjusting screw rod is in threaded connection with a sliding block, and the sliding block is in sliding connection with an air inlet end, so that a compression spring can be compressed and released by rotating the adjusting screw rod to adjust the sliding block, the compression spring is prevented from rotating, and accurate adjustment can be realized.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of pressure relief valve, specifically point to an adjustable precision pressure relief valve. BACKGROUND

[0002] At present in the massage health industry, the air pump is easy to overcharge during the process of inflating the air bag, which leads to the air bag burst, in order to solve this problem, many designers connect a pressure relief valve on the air bag, adjust to the safe pressure as needed, to protect the air bag from overloading.

[0003] Generally, the pressure relief valve is not adjustable, such as Figure 4 As shown in the figure, the compression amount of the pressure relief valve spring is fixed, so it cannot be adjusted, and the opening pressure range is relatively large, generally about 10kpa;

[0004] There are also some adjustable pressure relief valves in the prior art, such as Figure 5 As shown in the figure, when the adjustable pressure relief valve rotates the adjusting screw, the spring directly contacts the adjusting screw, which causes the spring to rotate easily, so it is not good for precise adjustment. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is:

[0006] The prior art cannot adjust or accurately adjust the pressure value of the pressure relief valve.

[0007] To solve the above technical problems, the technical scheme provided by the utility model is: an adjustable precision pressure relief valve, comprising an air inlet end, a check gasket, a compression spring and an adjusting screw, the check gasket is arranged in the air inlet end and tightly arranged on the air inlet end, the compression spring is arranged in the air inlet end and sleeved on one end of the check gasket.

[0008] The air inlet end is also provided with a sliding block, and the sliding block is slidingly arranged in the air inlet end.

[0009] The adjusting screw is threadedly connected with the sliding block and relatively rotates, and the air inlet end is fixedly installed with a rear cover.

[0010] Further, the front side of the air inlet end is a smooth cavity, and the rear side of the air inlet end is provided with a plurality of outwardly recessed guide rails.

[0011] Further, the rear end of the air inlet end is provided with an embedding groove.

[0012] Further, the front side of the sliding block is provided with a groove, the front side of the sliding block is also provided with a gas hole, the rear side is a hollow cylindrical structure with internal threads, and a plurality of protrusions embedded with the guide rails are arranged on the outer side wall, and the guide rail and the protrusion relatively slide.

[0013] Further, the outer wall of the front side of the adjusting screw is provided with external threads matched with the internal threads of the sliding block, and the rear side is a two-section hollow circular table, one section of which is arranged close to the inner wall of the air inlet end, and the other section is arranged through the rear cover.

[0014] Further, the diameter of the air hole reserved on the front side of the sliding block is much smaller than the internal thread structure on the rear side.

[0015] Further, the adjusting screw is provided with an air passage.

[0016] The utility model discloses the beneficial effects achieved by the above structure are as follows:

[0017] Because the thread connection between the adjusting screw and the sliding block and the sliding connection between the sliding block and the air inlet end are arranged, the compression and relaxation of the compression spring can be realized by rotating the adjusting screw to adjust the sliding block, the rotation of the compression spring is prevented, and accurate adjustment can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of the adjustable precision pressure relief valve is provided.

[0019] Figure 2 A sectional view of the adjustable precision pressure relief valve is provided.

[0020] Figure 3 A schematic diagram of the structure of the air inlet end of the adjustable precision pressure relief valve is provided.

[0021] Figure 4 An existing non-adjustable pressure relief valve of the adjustable precision pressure relief valve is provided.

[0022] Figure 5 An existing adjustable pressure relief valve of the adjustable precision pressure relief valve is provided.

[0023] The air inlet end 1, the reverse pad 2, the compression spring 3, the sliding block 4, the adjusting screw 5, the rear cover 6, the guide rail 7, and the protrusion 8 are provided.

[0024] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, together with the embodiments of the utility model, to explain the utility model, and do not constitute a limitation on the utility model. DETAILED DESCRIPTION

[0025] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments; based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0026] As shown in Figures 1-3 The utility model provides a kind of adjustable precision pressure relief valve, including air inlet end 1, check pad 2, compression spring 3 and adjusting screw 5, check pad 2 is located in air inlet end 1 and is tightly attached air inlet end 1 setting, compression spring 3 is located in air inlet end 1 and is set in one end of check pad 2;Air inlet end 1 is also provided with slider 4, slider 4 is slidably arranged in air inlet end 1;The adjusting screw 5 is threadedly connected with slider 4 and relatively rotates, the end of air inlet end 1 is fixedly installed rear cover 6 by ultrasonic welding, the end of air inlet end 1 rear side is provided with the embedded groove of the rear cover 6 for easy installation, and adjusting screw 5 leaves air passage.

[0027] As shown in Figures 1-3 The rear side rotating adjusting screw 5 can push slider 4 to move forward to compress compression spring 3 to realize the effect of increasing pressure relief valve pressure, and moving backward to relax compression spring 3 can realize the effect of reducing pressure, in order to facilitate the installation of internal parts and limit, the front side of air inlet end 1 is smooth cavity for facilitating the movement of check pad 2, and the rear side of air inlet end 1 is provided with a plurality of outwardly recessed guide rails 7.

[0028] As shown in Figures 1-3 The front side of slider 4 is provided with a groove, and the groove is used for limiting compression spring 3, the front side of slider 4 is also reserved with air hole, and the rear side is hollow cylindrical structure with internal thread, the diameter of the front side of slider 4 is much smaller than the internal thread structure of the rear side, and a plurality of protrusions 8 embedded with guide rails 7 are arranged on the outer wall, and the guide rails 7 and the protrusions 8 relatively slide. Because of the guide rails 7 and the protrusions 8, the slider 4 will not rotate during the rotation of the adjusting screw 5, so that the linear movement of the slider 4 relative to the compression spring 3 can be ensured to realize the effect of compressing and relaxing the compression spring 3.

[0029] The front side of adjusting screw 5 is provided with external thread matched with the internal thread of slider 4, and the rear side is two-section hollow circular table, one section is closely attached to the inner wall of air inlet end 1, and the other section penetrates through rear cover 6. Rotating adjusting screw 5 pushes slider 4 to move, so that adjusting screw 5 does not directly contact compression spring 3, preventing friction from rotating compression spring 3.

[0030] It is to be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0031] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the following claims and their equivalents.

[0032] The above description of the present application and its embodiments has been described, which is not restrictive, and the embodiments shown in the drawings are only one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired by it, without departing from the creative purpose of the present application, without creative design, similar structure and embodiments of the technical scheme should belong to the protection scope of the present application.

Claims

1. An adjustable precision pressure relief valve, comprising an air inlet end (1), a check washer (2), a compression spring (3) and an adjusting screw (5), the check washer (2) is arranged in the air inlet end (1) and closely arranged with the air inlet end (1), the compression spring (3) is arranged in the air inlet end (1) and sleeved on one end of the check washer (2); characterized in that: a sliding block (4) is further arranged in the air inlet end (1), the sliding block (4) is slidingly arranged in the air inlet end (1); the adjusting screw (5) is threadedly connected with the sliding block (4) and relatively rotates, and a rear cover (6) is fixedly installed at the end of the air inlet end (1).

2. The adjustable precision pressure relief valve of claim 1, wherein: The front side of the air inlet end (1) is a smooth cavity, and a plurality of outwardly recessed guide rails (7) are arranged on the rear side of the air inlet end (1).

3. The adjustable precision pressure relief valve of claim 1, wherein: An embedded groove is arranged at the end of the rear side of the air inlet end (1).

4. The adjustable precision pressure relief valve of claim 2, wherein: The front side of the sliding block (4) is provided with a groove, the front side of the sliding block (4) is further provided with an air hole, the rear side is a hollow cylindrical structure with internal threads, and a plurality of protrusions (8) embedded with the guide rails (7) are arranged on the outer side wall, and the guide rails (7) and the protrusions (8) relatively slide.

5. An adjustable precision pressure relief valve according to claim 4, wherein: The front side of the adjusting screw (5) is provided with external threads matched with the internal threads of the sliding block (4), and the rear side is a two-section hollow circular table, one section is closely arranged with the inner wall of the air inlet end (1), and the other section is arranged through the rear cover (6).

6. An adjustable precision pressure relief valve according to claim 5, wherein: The diameter of the air hole reserved on the front side of the sliding block (4) is much smaller than the internal thread structure on the rear side.

7. The adjustable precision pressure relief valve of claim 5, wherein: The adjusting screw (5) is provided with an air passage.

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