Sealing structure of pressure regulator

Abstract

The utility model discloses a sealing structure of a pressure regulator, which comprises a valve body, a valve seat and a valve core, the valve seat and the valve core are arranged in the valve body, threads are arranged on the surface of the valve seat, the valve seat and the valve body form a first valve seat seal through the threads, a first sealing groove is arranged at the joint of the valve core and the valve seat, and valve core filler is filled in the first sealing groove. The valve element and the valve seat form sealing through the valve element filler, a second sealing groove is further formed in the connecting position of the valve seat and the valve body, a sealing ring is installed in the second sealing groove, and the valve seat and the valve body form second valve seat sealing through the sealing ring. Double sealing between the valve seat and the valve body is achieved, and the sealing performance is enhanced; a plane sealing structure of the valve seat is changed into a conical sealing structure, conical sealing between the valve seat and the valve element is achieved, and firmness and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage regulators, in particular to a sealing structure of a voltage regulator. Background Art

[0002] In the prior art, such as Figure 1~2 As shown, the thread X on the valve seat 3 of the pressure regulator forms a seal with the valve body 1, the valve seat 3 forms a seal with the valve core filler 4 on the valve core 5, the valve seat plane sealing structure Y is rectangular, and the slot size of the valve core filler 4 is larger than the outer diameter of the valve seat plane sealing structure Y. In this structure, after the seal formed by the thread X on the valve seat 3 of the pressure regulator and the valve body 1 fails, the pressure regulator will directly leak internally, and after the seal formed by the valve seat 3 and the valve core filler 4 on the valve core 5 fails, the pressure regulator will directly leak internally. Based on the above, we found that the seal formed by the thread X on the valve seat 3 and the valve body 1 has a certain failure rate, but the existing proportion is lower than the failure rate of the seal formed by the valve seat 3 and the valve core filler 4 on the valve core 5, and the proportion of the seal formed by the valve seat 3 and the valve core filler 4 on the valve core 5 is higher. The reason is that when the medium flowing in the pressure regulator is not clean and has impurities, it causes direct damage to the valve core filler 4, so that it cannot play a sealing role. Summary of the invention

[0003] According to an embodiment of the utility model, a sealing structure of a pressure regulator is provided, comprising a valve body, a valve seat and a valve core arranged in the valve body, a thread is arranged on the surface of the valve seat, the valve seat forms a first valve seat seal with the valve body through the thread, a first sealing groove is arranged at the junction of the valve core and the valve seat, the first sealing groove is filled with a valve core filler, and the valve core forms a seal with the valve seat through the valve core filler,

[0004] A second sealing groove is also provided at the junction of the valve seat and the valve body, a sealing ring is installed in the second sealing groove, and the valve seat forms a second valve seat seal with the valve body through the sealing ring.

[0005] Furthermore, the valve core filler is fluororubber.

[0006] Furthermore, a circle of conical protrusions is provided on the interface between the valve seat and the valve core filler. When the valve core filler is damaged, the inclined surface of the conical protrusions abuts against the outer circle of the first sealing groove.

[0007] Furthermore, the outer diameter of the conical protrusion is greater than the outer diameter of the first sealing groove.

[0008] According to the sealing structure of the pressure regulator of the embodiment of the utility model, double sealing between the valve seat and the valve body is achieved, thereby enhancing the sealing performance; the flat sealing structure of the valve seat is changed into a conical sealing structure, thereby achieving a conical sealing between the valve seat and the valve core, which is firm and reliable.

[0009] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a sealing schematic diagram of a normal state of a voltage regulator in the prior art;

[0011] Figure 2 It is a schematic diagram of a failure state of a valve core filler of a pressure regulator in the prior art;

[0012] Figure 3 A schematic diagram of the sealing structure of the voltage regulator in a normal state according to an embodiment of the utility model

[0013] Figure 4 It is a schematic diagram of a valve core filler failure state of a sealing structure of a pressure regulator according to an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings to further illustrate the present invention.

[0015] First, combine Figure 3~4 The sealing structure of the voltage regulator according to the embodiment of the utility model is described, which is used to enhance the sealing inside the voltage regulator and has a wide range of application scenarios.

[0016] like Figure 3~4 As shown, the sealing structure of the pressure regulator of the embodiment of the utility model comprises a valve body 1, a valve seat 3 and a valve core 5 arranged in the valve body 1, a thread X is arranged on the surface of the valve seat 3, the valve seat 3 forms a first valve seat seal with the valve body 1 through the thread X, a first sealing groove Z is arranged at the junction of the valve core 5 and the valve seat 3, the first sealing groove Z is filled with a valve core filler 4, the valve core 5 forms a seal with the valve seat 3 through the valve core filler 4, a second sealing groove is also arranged at the junction of the valve seat 3 and the valve body 1, a sealing ring 2 is installed in the second sealing groove, the valve seat 3 forms a second valve seat seal with the valve body 1 through the sealing ring 2, so that a double seal is formed between the valve seat 3 and the valve body 1, which greatly reduces the risk of leakage, and can also effectively prevent external contaminants from entering the gap between the valve seat 3 and the valve body 1, protecting the integrity of the sealing structure. In this embodiment, the valve core filler 4 is fluororubber, which is resistant to high temperature wear, has excellent elasticity and resilience, can quickly restore to its original state under pressure, maintains sealing performance, and is stable and reliable.

[0017] Further, if Figure 3~4As shown, in this embodiment, the interface between the valve seat 3 and the valve core filler 4 is provided with a circle of conical protrusions 6. Under normal conditions, the conical protrusions 6 and the valve core filler 4 form a seal. When the valve core filler 4 is damaged, the inclined surface of the conical protrusions 6 abuts against the outer circle of the first sealing groove Z to form a conical seal, thereby realizing a double seal of the valve core 5, which can prevent or reduce leakage in time in the event of an accident, and protect the safety of the equipment and the working environment. The outer diameter of the conical protrusions 6 is larger than the outer diameter of the first sealing groove Z, ensuring that the conical protrusions 6 and the outer circle of the first sealing groove Z are tightly matched to improve the anti-leakage performance.

[0018] like Figure 3~4 As shown, the utility model adds a sealing ring 2 to the valve seat 3 on the basis of the prior art so that the thread X of the valve seat 3 of the pressure regulator forms a seal with the valve body 1, and at the same time, the sealing ring 2 on the valve seat 3 of the pressure regulator forms a seal with the valve body 1, thereby forming a double seal between the valve seat 3 and the valve body 1.

[0019] The utility model redesigns the plane sealing structure of the valve seat 3 into a conical sealing structure, re-slims the slot of the valve core filler 4, so that the valve seat 3 forms a seal with the valve seat 3 filler under normal working conditions. When the filler is damaged, the valve core 5 forms a conical seal with the outer circle of the slot of the valve core filler 4 and the valve seat 3 through the spring force. At the same time, the pressure regulator is designed with low inlet and high outlet. Under the upstream pressure, the valve core 5 is tightly pressed on the conical protrusion 6 of the valve seat 3 to form a more reliable conical line seal. Therefore, the valve seat 3 forms a seal with the valve seat 3 filler under normal working conditions, and the valve core 5 forms a conical seal with the outer circle of the slot of the valve core filler 4 and the valve seat 3 through the spring force, so that the valve core 5 achieves double sealing.

[0020] Above, refer to Figure 3~4 The sealing structure of the pressure regulator according to the embodiment of the utility model is described, which realizes double sealing between the valve seat and the valve body and enhances the sealing performance; the flat sealing structure of the valve seat is changed to a conical sealing structure, which realizes conical sealing between the valve seat and the valve core, which is firm and reliable.

[0021] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A sealing structure of a pressure regulator, comprising a valve body, a valve seat and a valve core arranged in the valve body, wherein the surface of the valve seat is provided with threads, the valve seat forms a first valve seat seal with the valve body through the threads, a first sealing groove is provided at the junction of the valve core and the valve seat, the first sealing groove is filled with a valve core filler, the valve core forms a seal with the valve seat through the valve core filler, and is characterized in that: A second sealing groove is also provided at the junction of the valve seat and the valve body, a sealing ring is installed in the second sealing groove, and the valve seat forms a second valve seat seal with the valve body through the sealing ring.

2. The sealing structure of the voltage regulator according to claim 1, characterized in that: The valve core filler is fluororubber.

3. The sealing structure of the voltage regulator according to claim 1, characterized in that: A circle of conical protrusions is provided on the interface between the valve seat and the valve core filler. When the valve core filler is damaged, the inclined surface of the conical protrusions abuts against the outer circle of the first sealing groove.

4. The sealing structure of the voltage regulator according to claim 3, characterized in that: An outer diameter of the conical protrusion is greater than an outer diameter of the first sealing groove.

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