Bidirectional sealing pressure-bearing valve

Abstract

The utility model provides a two-way sealing pressure-bearing valve. The two-way sealing pressure-bearing valve comprises a valve body, the sealing structure is arranged at one end of the valve body and comprises a connecting cylinder, an external thread arranged on the outer wall of the connecting cylinder, a first threaded ring connected with the external thread, a sealing ring arranged on the head portion of the first threaded ring and an annular inner groove formed in the tail portion of the connecting cylinder. The second threaded ring is in threaded connection with the annular inner groove, the plugging piece is arranged at one end of the second threaded ring, and the threaded sealing piece is arranged at one end of the connecting cylinder. Through the design of multiple sealing and precise connection, fluid leakage can be effectively prevented, the valve can adapt to different pressure and temperature environments, the service life of the valve is prolonged, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bidirectional sealing pressure-bearing valve. BACKGROUND

[0002] With the increasing requirements of safety and sealing performance of valve systems, the sealing performance of valves has become an important technical index. However, existing household valves still have some problems in terms of sealing performance, especially in long-term use or high-pressure environments, which can easily cause leakage, affecting the normal operation of the system and the safety of users.

[0003] At present, common household valves on the market are mostly connected with pipelines through threaded connection or flange connection. Although these connection methods are simple and easy to implement, they can easily cause sealing problems due to material aging, improper installation, or pressure fluctuations in actual use. In particular, in high-pressure environments, the traditional sealing structure often has difficulty in withstanding high pressure, leading to leakage at the connection between the valve and the pipeline. In addition, the existing valve sealing structure mostly uses elastic materials such as rubber gaskets or O-rings, which can easily deform or age after long-term use, further reducing the sealing performance.

[0004] Therefore, designing a valve with good sealing performance is the research direction of the utility model. CONTENT OF THE UTILITY MODEL

[0005] The utility model provides a bidirectional sealing pressure-bearing valve, which can effectively solve the above problems.

[0006] The utility model is implemented as follows:

[0007] A bidirectional sealing pressure-bearing valve, comprising

[0008] a valve body;

[0009] a sealing structure provided at one end of the valve body, the sealing structure comprising a connecting cylinder, an external thread provided on the outer wall of the connecting cylinder, a first threaded ring connected with the external thread, a sealing ring provided at the head of the first threaded ring, an annular inner groove formed at the tail of the connecting cylinder, a second threaded ring threadedly connected with the annular inner groove, a plugging piece provided at one end of the second threaded ring, and a threaded sealing piece provided at one end of the connecting cylinder;

[0010] an auxiliary mounting structure provided on the valve body for sealing connection with the first threaded ring.

[0011] The utility model has the beneficial effects of:

[0012] (1) The utility model discloses a multiple sealing design and precision connection mode, improve the sealing performance and stability of valve in the pipeline system significantly, through the threaded connection of first threaded ring and connecting cylinder and the design of sealing ring embedding seal groove, realize first reliable sealing, through the threaded connection of second threaded ring and the annular inner groove of connecting cylinder tail and the inretracting type lamination sealing part of plugging piece, ensure the second tight sealing of pipeline outer wall, through the annular groove adaptation of threaded sealing piece and second flange and the elastic deformation ability of sealing pad, further strengthen third sealing effect, the installation ring and inner boss design in auxiliary installation structure, ensure the accurate cooperation and firmness between first threaded ring and connecting cylinder, and the overall sealing and stability between valve and pipeline are further improved with overall structure. This multiple sealing and precision connection design not only can effectively prevent fluid leakage, but also can adapt to different pressure and temperature environment, prolong the service life of valve, reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the following will be briefly introduced to the drawing needed to be used in the embodiment, and should understand, the following drawing only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0014] Figure 1 It is the front view of the utility model.

[0015] Figure 2 It is the valve body development diagram of the utility model.

[0016] Figure 3 It is the schematic diagram of the first threaded ring of the utility model.

[0017] Figure 4 It is the schematic diagram of the installation ring of the utility model.

[0018] Explanation of the attached drawing:

[0019] 10, valve body;

[0020] 40, sealing structure, 400, connecting cylinder, 401, external thread, 402, first threaded ring, 4022, sealing ring, 403, annular inner groove, 404, second threaded ring, 405, plugging ring, 406, lamination sealing part, 407, third threaded ring, 4070, connecting rod, 4071, abutment ring plate, 4072, sealing pad, 4073, protruding part;

[0021] 60, installation ring, 600, inner ring, 602, sealing groove, 604, inner boss. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model embodiment clearer, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment. Obviously, the described embodiment is a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.

[0023] In the description of the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0024] Referring to Figures 1-4 The bidirectional sealing pressure-bearing valve comprises.

[0025] The valve body 10.

[0026] The sealing structure 40 is arranged at one end of the valve body 10, and the sealing structure 40 comprises a connecting cylinder 400, an outer thread 401 arranged on the outer wall of the connecting cylinder 400, a first threaded ring 402 connected with the outer thread 401, a sealing ring 4022 arranged at the head of the first threaded ring 402, an annular inner groove 403 formed at the tail of the connecting cylinder 400, a second threaded ring 404 threadedly connected with the annular inner groove 403, a plugging piece arranged at one end of the second threaded ring 404, and a threaded sealing piece arranged at one end of the connecting cylinder 400.

[0027] The sealing ring 4022 is made of a high-temperature-resistant and corrosion-resistant elastic material (such as nitrile rubber, fluorine rubber or polytetrafluoroethylene), so as to ensure good sealing performance under different temperatures and chemical environments.

[0028] An auxiliary mounting structure is arranged on the valve body 10 and used for connecting and sealing with the first threaded ring 402; the auxiliary mounting structure comprises a mounting ring 60, an inner ring 600 arranged at the middle part of the mounting ring 60, a sealing groove 602 formed between the inner ring 600 and the mounting ring 60, and an inner boss 604 arranged in the sealing groove 602.

[0029] The blocking piece comprises a blocking ring 405, a sealing part 406 arranged at one end of the blocking ring 405, and the sealing part 406 is contracted towards the center of the pipeline at the end away from the blocking ring 405, so as to be sealed with the outer wall of the pipeline. The advantage of this design is that it can adapt to pipelines of different diameters and maintain stable sealing performance in a high-pressure environment.

[0030] In this embodiment, the sealing part 406 is made of rubber or polyurethane.

[0031] The threaded sealing piece comprises a third threaded ring 407, a plurality of connecting rods 4070 arranged around the front end surface of the third threaded ring 407, an abutting ring plate 4071 arranged at one end of the plurality of connecting rods 4070, and a sealing gasket 4072 arranged at the front end of the abutting ring plate 4071. One end of the sealing gasket 4072 extends a protrusion 4073 that penetrates the middle of the flange (not shown in the figure). The design of the connecting rods 4070 and the abutting ring plate 4071 ensures that the sealing gasket 4072 is uniformly stressed when under pressure, avoiding local stress concentration that can cause sealing failure. The rigid structure of the abutting ring plate 4071 can also prevent excessive deformation of the sealing gasket.

[0032] In one embodiment, when the valve is installed outdoors and used with a flange, an annular groove (not shown in the figure) is formed at one end of the flange, and the annular groove is adapted to the sealing gasket 4072, thereby sealing the flange, thereby improving the sealing performance of the valve when connected to the pipeline.

[0033] Further, the end surface of the inner boss 604 and the end of the first threaded ring 402 are in interference fit, ensuring that there is no gap between them, further improving the sealing performance.

[0034] The utility model discloses a kind of installation steps of pipeline and valve body, as follows:

[0035] S1, using laser centering instrument or level to check the centering situation of valve body 10 and pipeline, ensure that the axis of both coincides, deviation is not more than 0.5mm;

[0036] S2, before installation, using non-woven fabric and cleaning agent to remove oil dirt, dust and rust mark on the contact surface of pipeline interface, ensure that the contact surface is clean;

[0037] S3, connecting cylinder 400 is inserted into the mounting hole of valve body 10, ensure that its outer thread 401 is aligned with the first threaded ring 402, using special spanner gradually tightens the first threaded ring 402, until sealing ring 4022 is completely embedded in sealing groove 602;

[0038] S4, screw the second threaded ring 404 into the annular inner groove 403 at the tail of the connecting cylinder 400, ensure that it is tightly connected with the blocking ring 405, and tighten the second threaded ring 404 according to the specified torque value using a torque wrench, avoiding excessive tightening that may damage the threads;

[0039] S5, apply an appropriate amount of thread sealant (such as Loctite 577) to the outer threads 401 of the third threaded ring 407 to enhance sealing and prevent loosening, and screw the third threaded ring 407 into the connecting cylinder 400 until the protruding part 4073 of the sealing pad 4072 is completely embedded in the annular groove of the flange plate (the outer wall of the pipeline);

[0040] S6, use special tools to adjust the length of the connecting rod 4070 to ensure that the abutting ring plate 4071 and the sealing pad 4072 are in uniform contact, and check the deformation of the sealing pad 4072 to ensure that it is uniformly stressed without local excessive deformation;

[0041] S7, align the mounting ring 60 with the front end of the valve body 10, use a positioning pin to ensure accurate centering, and check the contact surface between the inner boss 604 and the first threaded ring 402 to ensure no gap, and before installation, use an endoscope to check the internal condition of the sealing groove 602 to ensure no impurities or damage;

[0042] S8, after installation, perform a pressure test (such as 1.5 times the working pressure), use soap water or leak detection agent to check whether there is leakage at each connection, if there is leakage, gradually check and retighten the relevant parts.

[0043] Working principle:

[0044] In the installation, the valve body 10 is placed in the predetermined position, ensuring that it is aligned with the pipeline, then the connecting cylinder 400 is aligned with the mounting ring 60, then the first threaded ring 402 is rotated until the sealing ring 4022 at one end of the first threaded ring 402 is embedded in the sealing groove 602 between the mounting ring 60 and the inner ring 600, thereby achieving a resealing, when the sealing ring 4022 is completely embedded in the sealing groove 602, the end of the first threaded ring 402 is in contact with the inner boss 604, and the first threaded ring 402 and the connecting cylinder 400 are threadedly connected, thereby ensuring the firmness of the sealing ring 4022 and improving the tightness of the two structural combinations, then the second threaded ring 404 is rotated into the annular inner groove 404, after the fixing is completed, the pipeline can be inserted into the connecting cylinder 400, then the third threaded ring 407 is rotated through the outer thread 401, so that the sealing gasket 4072 at one end of the third threaded ring 407 is inserted into the annular groove at one end of the flange plate of the pipeline outer wall, since the sealing gasket 4072 has a certain deformation capacity, when the third threaded ring 407 is fixed, the connecting rod 4070 and the abutting ring plate 4071 are provided at the front end of the third threaded ring 407, the third threaded ring 407 is rotated, driving the abutting ring plate 4071 on the connecting rod 4070 to abut the sealing gasket 4072, so that the gap between the sealing gasket 4072 and the annular groove can be avoided, thereby achieving secondary sealing, furthermore, since the abutting sealing part 406 at one end of the plugging ring 405 is of the inwardly retracting type, the pipeline can better contact the abutting sealing part 406, thereby improving the sealing between the pipeline and the valve 10, which is a triple sealing, thereby further improving the sealing between the pipeline and the valve 10.

[0045] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A bidirectional, seal-pressurized valve, characterized in that, Comprising a valve body (10); a sealing structure (40) arranged at one end of the valve body (10), the sealing structure (40) comprising a connecting cylinder (400), an outer thread (401) arranged on the outer wall of the connecting cylinder (400), a first threaded ring (402) connected with the outer thread (401), a sealing ring (4022) arranged at the head of the first threaded ring (402), an annular inner groove (403) formed at the tail of the connecting cylinder (400), a second threaded ring (404) threadedly connected with the annular inner groove (403), a plugging piece arranged at one end of the second threaded ring (404), and a threaded sealing piece arranged at one end of the connecting cylinder (400); an auxiliary mounting structure arranged on the valve body (10) and used for connecting and sealing with the first threaded ring (402).

2. A bidirectional seal pressure retaining valve according to claim 1, characterized in that The plugging piece comprises a plugging ring (405) and a close-contact sealing part (406) arranged at one end of the plugging ring (405).

3. The bidirectional seal pressure-containing valve of claim 1, wherein, The threaded sealing piece comprises a third threaded ring (407), a plurality of connecting rods (4070) arranged around the front end face of the third threaded ring (407), an abutting ring plate (4071) arranged at one end of the plurality of connecting rods (4070), and a sealing gasket (4072) arranged at the front end of the abutting ring plate (4071).

4. A bidirectional seal pressure retaining valve according to claim 3, wherein One end of the sealing gasket (4072) extends a protruding part (4073) penetrating the middle part of the flange plate.

5. A bidirectional seal pressure retaining valve according to claim 4, wherein One end of the flange plate is formed with an annular groove, and the annular groove is matched with the sealing gasket (4072), so as to seal the flange plate.

6. The bidirectional seal pressure-containing valve of claim 1, wherein, The auxiliary mounting structure comprises a mounting ring (60), an inner ring (600) arranged in the middle part of the mounting ring (60), a sealing groove (602) formed between the inner ring (600) and the mounting ring (60), and an inner boss (604) arranged in the sealing groove (602).

7. A bidirectional seal pressure-containing valve according to claim 2, wherein The close-contact sealing part (406) away from one end of the plugging ring (405) is contracted towards the center of the pipeline, so as to be close-contact sealed with the outer wall of the pipeline.

8. A bidirectional seal pressure-containing valve according to claim 6, wherein One end of the first threaded ring (402) is close-contacted with the inner boss (604), so as to ensure the sealing between the connecting cylinder (400) and the valve body (10).

9. The bidirectional seal pressure-containing valve of claim 2, wherein, The close-contact sealing part (406) is made of rubber or polyurethane material.

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