Valve body structure

Abstract

The utility model relates to the technical field of valves, in particular to a valve body structure which sequentially comprises a valve port, a rubber film assembly used for opening and closing the valve port and a sleeve from bottom to top, an adjusting screw is connected in the sleeve in a threaded mode, an upper spring seat is arranged at the bottom of the adjusting screw, and a lower spring seat is arranged at the top of the rubber film assembly. A spring is mounted between the lower spring seat and the upper spring seat; the side wall of the adjusting screw extends downwards to form a guide sleeve in threaded connection with the sleeve, the inner wall of the guide sleeve is smooth, and the upper spring seat and part of the spring are located in the guide sleeve. The valve has the advantages that the guide sleeve is similar to a retaining wall of a spring, the spring can be prevented from being in threaded contact with the inner wall of the sleeve, so that the performance is optimized, the guide sleeve and the adjusting screw are integrally formed, only the adjusting screw is involved in the change of the machining process, the structure of the valve cannot be affected, the improvement cost is low, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve body structure. Background Art

[0002] like Figure 1 The figure shows the internal structure of an existing valve, which includes a valve port, a rubber film assembly for opening and closing the valve port, a spring and an adjusting screw from bottom to top. The lower part of the valve port is connected to the valve body chamber. When the gas in the chamber flows to a certain pressure, the rubber film assembly can be pushed open to open the valve port. The upper part of the rubber film assembly is provided with an integrally formed lower spring seat, the bottom of the adjusting screw is provided with an upper spring seat, and the two ends of the spring are respectively installed on the upper and lower spring seats. The valve body is provided with a sleeve at the upper part of the valve port, and the adjusting screw is connected to the sleeve by a thread (the outer wall of the adjusting screw is provided with an external thread, and the inner wall of the sleeve is provided with an internal thread). By screwing the screw, the compression of the spring can be changed, thereby adjusting the downward pressure of the spring on the rubber film assembly, changing the opening pressure of the valve port, and then adjusting the performance of the valve.

[0003] The above structure has the following defects: the spring exerts force on the rubber film assembly through deformation. When the spring deforms a lot and twists or is poorly installed, the spring is easy to contact the internal thread on the inner wall of the sleeve, resulting in unstable adjustment.

[0004] Based on this, this case is brought forward. Utility Model Content

[0005] The purpose of the utility model is to provide a valve body structure to solve the above-mentioned defects.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A valve body structure comprises, from bottom to top, a valve port, a rubber film assembly for opening and closing the valve port, and a sleeve, wherein an adjusting screw is connected to the inner thread of the sleeve, an upper spring seat is provided at the bottom of the adjusting screw, a lower spring seat is provided at the top of the rubber film assembly, and a spring is installed between the lower spring seat and the upper spring seat; the side wall of the adjusting screw extends downward to form a guide sleeve threadedly connected to the sleeve, and the inner wall of the guide sleeve is smooth, and the upper spring seat and part of the spring are located in the guide sleeve.

[0008] The advantages of the utility model are: the guide sleeve is similar to the protective wall of the spring, which can prevent the spring from contacting the thread at the inner wall of the sleeve, thereby optimizing the performance; secondly, the guide sleeve and the adjusting screw are integrally formed, and the change in the processing technology only involves the adjusting screw (the adjusting screw itself is a plastic part, and the process adjustment is also relatively convenient), which will not affect the structure of the valve itself, the modification cost is low, and the practicality is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure inside the valve in the prior art;

[0010] Figure 2 Schematic diagram of the structure inside the valve in the embodiment;

[0011] Description of symbols

[0012] 1. Rubber film assembly; 2. Spring; 3. Upper spring seat; 4. Adjusting screw; 5. Sleeve; 6. Lower spring seat; 7. Valve port; 8. Guide sleeve. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" herein are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0014] This embodiment provides a valve body structure, such as Figure 2 As shown, a chamber is provided at the lower part of the valve body, a gas inlet and a gas outlet are provided at the bottom of the chamber, a valve port 7 is provided in the chamber, and a rubber film assembly 1 for opening and closing the valve port 7 is provided at the top of the valve port 7. The lower channel of the valve port 7 is connected with the gas inlet, and when the gas flows in to a certain pressure, the rubber film assembly 1 can be pushed open, thereby opening the valve port 7.

[0015] The upper part of the valve body is a sleeve 5 with an internal thread, and an adjusting screw 4 and a spring 2 are arranged in the sleeve 5. The side wall of the adjusting screw 4 extends downward to form a guide sleeve 8. The guide sleeve 8 and the outer wall of the adjusting screw 4 are provided with continuous external threads to achieve threaded connection with the sleeve 5. The inner wall of the guide sleeve 8 is smooth. The bottom of the adjusting screw 4 is provided with an upper spring seat, and the top of the rubber film assembly 1 is provided with a lower spring seat. The upper spring seat and part of the spring 2 are located inside the guide sleeve 8, and the two ends of the spring 2 are respectively installed on the upper spring seat and the lower spring seat.

[0016] When the adjusting screw 4 is screwed, the adjusting screw 4 (the part connected to the guide sleeve 8) can move up and down in the sleeve 5, changing the compression of the spring 2, thereby adjusting the downward pressure of the spring 2 on the rubber membrane assembly 1, changing the opening pressure of the valve port 7, and then adjusting the performance of the valve. When the adjusting screw 4 moves downward by a large amount or the spring 2 is poorly installed, causing the spring 2 to deform and twist, the twisted spring 2 touches the inner wall of the guide sleeve 8. Since the inner wall of the guide sleeve 8 is smooth, it will not hinder the deformation of the spring 2, that is, it has little effect on the adjustment function of the spring 2. Compared with the background technology, in which the spring 2 contacts the internal thread on the inner wall of the sleeve 5, the probability of unstable adjustment caused by the twisting of the spring 2 in this embodiment will be greatly reduced.

[0017] The above embodiments are only used to explain the concept of the present invention, rather than to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A valve body structure, which comprises, from bottom to top, a valve port, a rubber film assembly for opening and closing the valve port, and a sleeve, wherein an adjusting screw is connected to the inner thread of the sleeve, an upper spring seat is provided at the bottom of the adjusting screw, a lower spring seat is provided at the top of the rubber film assembly, and a spring is installed between the lower spring seat and the upper spring seat, Features: The side wall of the adjusting screw extends downward to form a guide sleeve which is threadedly connected to the sleeve, and the inner wall of the guide sleeve is smooth. The upper spring seat and part of the spring are located in the guide sleeve.

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