Floating sealing assembly of gas valve

Abstract

The floating sealing assembly of the gas valve comprises an installation base and a sealing mechanism, evenly-distributed bolt holes are formed in the four corners of the installation base, the sealing mechanism comprises a sleeve, a groove and a hexagonal pressing ring, the sleeve is fixedly connected to the middle of the upper end of the installation base, evenly-distributed threads are formed in the upper end of the outer surface of the sleeve, and the hexagonal pressing ring is fixedly connected to the groove. The inner diameter of the lower end of the inner wall of the sleeve is equal to that of the receding opening, the inner diameter of the upper end of the inner wall of the sleeve is larger than that of the receding opening, the grooves are evenly formed in the upper end of the outer surface of the sleeve, and the hexagonal pressing ring is in threaded connection to the middle of the outer surface of the sleeve. According to the floating sealing assembly of the gas valve, the strong sealing effect can be achieved on the valve rod and the valve body at the same time, the sealing strength can be adjusted at any time, the movement of the flexible sealing ring is slowed down, meanwhile, the high-strength sealing performance can be kept, the perpendicularity of the valve rod can be kept at any time, and gas leakage caused by abrasion of the valve rod is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a floating sealing component of a gas valve. Background Art

[0002] A gas valve is a device used to control the flow of gas, which is usually composed of a valve body, a valve core and a valve stem. The working principle of a gas valve is based on the on-off control of the valve. When the gas valve is closed, the valve core is tightly connected to the valve seat to prevent gas from passing through the valve; when gas needs to flow through the gas valve, the valve core can be separated from the valve seat by external force (such as manual rotation of the valve, electromagnetic force, pneumatic force, etc.), and the gas valve can be opened, and the gas can flow from one pipeline or container through the gas valve and enter another pipeline or container.

[0003] When the valve core and the valve seat are separated, the channel switches from a closed state to an open state. By adjusting the position of the valve core, the opening size of the channel can be controlled, thereby adjusting the flow of gas. When the valve core and the valve seat are tightly connected again, the gas valve is closed again to stop the flow of gas. Since there is a gap between the valve body and the valve stem, in order to ensure the sealing of the gas valve, a sealing component is usually added between the valve body and the valve stem.

[0004] The sealing assembly of the existing gas valve is usually a flexible sealing ring fixed between two upper and lower gaskets, and then the sealing assembly is installed in the mounting block on the valve body. When gas passes through the valve body, the high-pressure gas continuously presses the lower gasket, causing the lower gasket to move upward, while the upper gasket does not move. The middle flexible sealing ring bends inward and fits tightly against the outer surface of the valve stem to achieve a further sealing effect. The traditional sealing assembly has a simple structure and can only produce a strong sealing effect on the valve stem surface. It is usually just an ordinary sealing effect. It can only produce a further sealing effect when the gas passes through and there is pressure. The sealing performance is not high, and the sealing strength cannot be adjusted at will. Every time the valve is opened and closed, the flexible sealing ring will move up and down significantly. If this continues for a long time, the flexible sealing ring will produce fatigue hardening, which will cause the risk of leakage. After the valve has been working for a long time, the surface of the valve stem will be worn and tilted and offset. At this time, when the valve stem is moved, the outer surface of the valve stem cannot fit tightly with the flexible sealing ring, which will cause gas leakage. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a floating seal assembly for a gas valve, which can produce a strong sealing effect on the valve stem and the valve body at the same time, adjust the sealing strength at any time, slow down the movement of the flexible sealing ring while maintaining high-strength sealing performance, and always maintain the verticality of the valve stem, effectively avoiding gas leakage caused by valve stem wear, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a floating seal assembly for a gas valve, comprising a mounting seat and a sealing mechanism;

[0007] The four corners of the mounting seat are provided with evenly distributed bolt holes, and the middle of the upper end of the mounting seat is provided with an escape opening;

[0008] The sealing mechanism includes a sleeve, a groove and a hexagonal pressure ring. The sleeve is fixedly connected to the middle part of the upper end of the mounting seat. The upper end of the outer surface of the sleeve is provided with evenly distributed threads. The inner diameter of the lower end of the inner wall of the sleeve is equal to the inner diameter of the avoidance opening. The inner diameter of the upper end of the inner wall of the sleeve is larger than the inner diameter of the avoidance opening. The grooves are evenly arranged at the upper end of the outer surface of the sleeve. The hexagonal pressure ring is threadedly connected to the middle part of the outer surface of the sleeve, which is convenient for adjusting the sealing strength. It can produce a strong sealing effect on the valve stem and the valve body at the same time. The sealing strength can be adjusted at any time, and the movement of the flexible sealing ring can be slowed down while maintaining high-strength sealing performance. The verticality of the valve stem can also be maintained at all times, which effectively avoids gas leakage caused by valve stem wear.

[0009] Furthermore, the lower end of the inner wall of the hexagonal pressure ring is provided with a chamfer, and the chamfer is installed in cooperation with the lower end of the outer surface of the sleeve to provide a basis for the adjustment work.

[0010] Furthermore, the sealing mechanism also includes a sealing ring, which is arranged in the middle of the inner wall of the sleeve. The inner diameter of the sealing ring is equal to the inner diameter of the avoidance opening, which further improves the sealing effect while maintaining the verticality of the valve stem.

[0011] Furthermore, the sealing mechanism also includes an extrusion assembly, which includes a sliding column, an upper pressure plate, a lower pressure plate and a spring. The sliding columns are slidably connected to the inside of the mounting seat through sliding holes. The upper ends of the four sliding columns are fixedly connected to the lower end of an upper pressure plate. The upper end of the upper pressure plate fits with the lower end of the hexagonal pressure ring. The lower ends of the four sliding columns are fixedly connected to the upper end of a lower pressure plate. Springs are provided between the lower end of the upper pressure plate and the mounting seat. The springs are sleeved on the upper end of the outer surface of the sliding column to provide a basis for adjustment.

[0012] Furthermore, the sealing mechanism also includes a mounting plate, a sealing rubber ring and a bottom plate. The mounting plate is fixedly connected to the lower end of the lower pressure plate, and the sealing rubber rings are arranged at the lower end of the mounting plate. The lower ends of the two sealing rubber rings are fixedly connected to the upper end of a bottom plate, so that a sealing effect can be formed between the valve stem and the valve body.

[0013] Furthermore, an arc-shaped notch is provided in the middle of the inner wall of the sealing rubber ring, so that the sealing rubber ring can bend outward at the same time, thereby producing a stronger sealing effect on the valve stem and the valve body.

[0014] Furthermore, it also includes a sealing pad 1 and a sealing pad 2, wherein the sealing pad 1 is arranged at the lower end of the mounting seat, and the sealing pad 2 is arranged at the lower end of the mounting plate, to provide sealing and buffering effects for the installation of the sealing assembly.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Turn the hexagonal pressure ring, and the hexagonal pressure ring moves downward, continuously squeezing the upper pressure plate downward, driving the sliding column downward. Because the mounting plate is fixedly connected to the lower end of the lower pressure plate, the mounting plate will also move downward. Because the lower end of the bottom plate fits with the bottom wall of the step hole, the bottom plate does not move, so as the mounting plate moves downward, the two sealing rubber rings are bent and deformed synchronously. The inner sealing rubber ring fits more tightly with the valve stem, and the outer sealing rubber ring fits more tightly with the inner wall of the step hole, until the lower end of the mounting plate contacts the bottom wall in the middle of the step hole. The sealing rubber pad 2 provides buffering and sealing effects for the mounting plate. When the gas valve is working, the gas passes through the inside of the valve body. The high-pressure gas passes through the gap between the step hole and the valve stem and continuously presses the bottom plate. The bottom plate is forced to move upward. At this time, since the sealing rubber ring has been bent and deformed, the distance the bottom plate moves upward will become very short and will not move a long distance. The sealing rubber ring deforms again to achieve the best sealing effect, effectively extending the service life of the sealing rubber ring. It can produce a strong sealing effect on the valve stem and the valve body at the same time, and adjust the sealing strength at any time. It can slow down the movement of the flexible sealing ring while maintaining high-strength sealing performance;

[0017] 2. As the hexagonal pressure ring moves downward, the chamfer at the lower end of the inner wall of the hexagonal pressure ring continuously squeezes the lower end of the outer surface of the sleeve, and the inclined surface at the lower end of the outer surface of the sleeve is continuously subjected to force. Since the grooves are evenly arranged at the upper end of the outer surface of the sleeve, the sleeve will deform inward along the grooves, continuously pressing the sealing ring, so that the inner wall of the sealing ring and the outer surface of the valve stem fit more closely. At the same time, the upper end of the inner wall of the sleeve will also fit with the outer surface of the valve stem, which can effectively prevent the valve stem from deviating, always keep the verticality of the valve stem, and effectively avoid gas leakage caused by valve stem wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the sealing mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the explosion structure of the sealing mechanism of the utility model.

[0021] In the figure: 1 mounting seat, 2 bolt hole, 3 sealing rubber gasket 1, 4 sealing rubber gasket 2, 5 sealing mechanism, 51 sleeve, 52 groove, 53 hexagonal pressure ring, 54 sealing ring, 55 extrusion assembly, 551 sliding column, 552 upper pressure plate, 553 lower pressure plate, 554 spring, 56 mounting plate, 57 sealing rubber ring, 58 bottom plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 The present embodiment provides a floating seal assembly for a gas valve, including a mounting seat 1 and a sealing mechanism 5; the four corners of the mounting seat 1 are provided with evenly distributed bolt holes 2 to facilitate the fixation of the mounting seat 1, and an avoidance opening is provided in the middle of the upper end of the mounting seat 1 to provide an avoidance effect for the valve stem.

[0024] Among them, the sealing mechanism 5 includes a sleeve 51, a groove 52 and a hexagonal pressure ring 53. The sleeve 51 is fixedly connected to the middle part of the upper end of the mounting seat 1. The upper end of the outer surface of the sleeve 51 is provided with evenly distributed threads. The inner diameter of the lower end of the inner wall of the sleeve 51 is equal to the inner diameter of the avoidance port, and the inner diameter of the upper end of the inner wall of the sleeve 51 is larger than the inner diameter of the avoidance port. The groove 52 is evenly opened at the upper end of the outer surface of the sleeve 51. The hexagonal pressure ring 53 is threadedly connected to the middle part of the outer surface of the sleeve 51 to facilitate the adjustment of the sealing strength. The lower end of the inner wall of the hexagonal pressure ring 53 is provided with a chamfer, and the chamfer is installed in coordination with the lower end of the outer surface of the sleeve 51 to provide a basis for the adjustment work.

[0025] The sealing mechanism 5 further includes a sealing ring 54, which is disposed in the middle of the inner wall of the sleeve 51. The inner diameter of the sealing ring 54 is equal to the inner diameter of the avoidance opening, which further improves the sealing effect while maintaining the verticality of the valve stem.

[0026] The sealing mechanism 5 further comprises an extrusion assembly 55, which comprises a slide column 551, an upper pressure plate 552, a lower pressure plate 553 and a spring 554. The slide columns 551 are all slidably connected to the inside of the mounting seat 1 through a sliding hole. The upper ends of the four slide columns 551 are all fixedly connected to the lower end of an upper pressure plate 552. The upper end of the upper pressure plate 552 fits with the lower end of the hexagonal pressure ring 53. The lower ends of the four slide columns 551 are all fixedly connected to the upper end of a lower pressure plate 553. A spring 554 is provided between the lower end of the upper pressure plate 552 and the mounting seat 1. The spring 554 is sleeved on the upper end of the outer surface of the slide column 551 to provide a basis for the adjustment work.

[0027] Among them, the sealing mechanism 5 also includes a mounting plate 56, a sealing rubber ring 57 and a bottom plate 58. The mounting plate 56 is fixedly connected to the lower end of the lower pressure plate 553, and the sealing rubber rings 57 are arranged at the lower end of the mounting plate 56. The lower ends of the two sealing rubber rings 57 are fixedly connected to the upper end of a bottom plate 58, so that a sealing effect can be formed between the valve stem and the valve body; the sealing rubber ring 57 has an arc-shaped recess in the middle of the inner wall, so that the sealing rubber ring 57 can bend outward at the same time, thereby producing a stronger sealing effect on the valve stem and the valve body.

[0028] Among them, it also includes a sealing pad 1 3 and a sealing pad 2 4. The sealing pad 1 3 is arranged at the lower end of the mounting seat 1, and the sealing pad 2 4 is arranged at the lower end of the mounting plate 56 to provide sealing and buffering effects for the installation of the sealing assembly; the sealing ring 54, the sealing rubber ring 57, the sealing pad 1 3 and the sealing pad 2 4 are all IIR butyl rubber sealing rings. The IIR butyl rubber sealing ring has good air tightness, heat resistance, sunlight resistance, ozone resistance, and good insulation performance. It can produce a strong sealing effect on the valve stem and the valve body at the same time, adjust the sealing strength at any time, slow down the movement of the flexible sealing ring while maintaining high-strength sealing performance, and always maintain the verticality of the valve stem, effectively avoiding gas leakage caused by valve stem wear.

[0029] The working principle of the utility model is as follows:

[0030] When installing the floating seal assembly of the gas valve, first make the valve stem pass through the floating seal assembly. At this time, the avoidance port, the sealing ring 54, and the sealing rubber ring 57 are all fitted with the outer surface of the valve stem, so that the sealing assembly and the outer surface of the valve stem form a preliminary seal, and then put the sealing assembly into the step hole on the valve body until the lower end of the bottom plate 58 fits with the bottom wall of the step hole to form a limit, and the sealing rubber ring 57 fits with the middle part of the inner wall of the step hole. At this time, the valve body, the valve stem and the sealing assembly all form a preliminary seal, and then the mounting seat 1 is fixed to the valve body by bolts, and the sealing rubber pad 3 provides a buffering effect for the fixation of the mounting seat 1;

[0031] Then, the sealing effect is enhanced by rotating the hexagonal pressure ring 53, which moves downward, continuously squeezing the upper pressure plate 552 downward, and driving the sliding column 551 downward. Since the mounting piece 56 is fixedly connected to the lower end of the lower pressure plate 553, the mounting piece 56 will also move downward. Since the lower end of the bottom piece 58 fits with the bottom wall of the step hole, the bottom piece 58 does not move. Therefore, as the mounting piece 56 moves downward, the two sealing rubber rings 57 are bent and deformed synchronously. The inner sealing rubber ring 57 fits more closely with the valve stem, and the outer sealing rubber ring 57 fits more closely with the inner wall of the step hole, until the lower end of the mounting piece 56 contacts the bottom wall in the middle of the step hole. , the sealing rubber pad 24 provides a buffer and sealing effect for the mounting sheet 56. At the same time, as the hexagonal pressure ring 53 moves downward, the chamfer at the lower end of the inner wall of the hexagonal pressure ring 53 continuously squeezes the lower end of the outer surface of the sleeve 51, and the inclined surface at the lower end of the outer surface of the sleeve 51 is continuously stressed. Since the grooves 52 are evenly arranged at the upper end of the outer surface of the sleeve 51, the sleeve 51 will deform inward along the grooves 52, continuously pressing the sealing ring 54, so that the inner wall of the sealing ring 54 and the outer surface of the valve stem fit more closely, and at the same time, the upper end of the inner wall of the sleeve 51 will also fit the outer surface of the valve stem, which can effectively prevent the valve stem from deflecting, and the sealing effect is enhanced;

[0032] When the gas valve is working, the gas passes through the inside of the valve body, and the high-pressure gas passes through the gap between the step hole and the valve stem to continuously press the bottom plate 58. The bottom plate 58 is forced to move upward. At this time, since the sealing rubber ring 57 has been bent and deformed, the upward movement distance of the bottom plate 58 will become very short and it will not move a long distance. The sealing rubber ring 57 deforms again to achieve the best sealing effect, which effectively extends the service life of the sealing rubber ring 57 and can produce a strong sealing effect on the valve stem and the valve body at the same time. The sealing strength can be adjusted at any time, and the movement of the flexible sealing ring can be slowed down while maintaining high-strength sealing performance. The verticality of the valve stem can also be kept at all times, effectively avoiding gas leakage caused by valve stem wear.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A floating seal assembly for a gas valve, characterized in that: It comprises a mounting seat (1) and a sealing mechanism (5); The four corners of the mounting seat (1) are provided with evenly distributed bolt holes (2), and the middle of the upper end of the mounting seat (1) is provided with an escape opening; The sealing mechanism (5) comprises a sleeve (51), a groove (52) and a hexagonal pressure ring (53); the sleeve (51) is fixedly connected to the middle of the upper end of the mounting seat (1); the upper end of the outer surface of the sleeve (51) is provided with evenly distributed threads; the inner diameter of the lower end of the inner wall of the sleeve (51) is equal to the inner diameter of the avoidance opening; the inner diameter of the upper end of the inner wall of the sleeve (51) is greater than the inner diameter of the avoidance opening; the groove (52) is evenly opened at the upper end of the outer surface of the sleeve (51); and the hexagonal pressure ring (53) is threadedly connected to the middle of the outer surface of the sleeve (51).

2. A floating seal assembly for a gas valve according to claim 1, characterized in that: The lower end of the inner wall of the hexagonal pressure ring (53) is provided with a chamfer, and the chamfer is mounted in cooperation with the lower end of the outer surface of the sleeve (51).

3. A floating seal assembly for a gas valve according to claim 2, characterized in that: The sealing mechanism (5) further comprises a sealing ring (54), wherein the sealing ring (54) is arranged in the middle of the inner wall of the sleeve (51), and the inner diameter of the sealing ring (54) is equal to the inner diameter of the avoidance opening.

4. A floating seal assembly for a gas valve according to claim 3, characterized in that: The sealing mechanism (5) also includes an extrusion assembly (55), which includes a slide column (551), an upper pressure plate (552), a lower pressure plate (553) and a spring (554). The slide columns (551) are slidably connected to the inside of the mounting seat (1) through a sliding hole. The upper ends of the four slide columns (551) are fixedly connected to the lower end of an upper pressure plate (552). The upper end of the upper pressure plate (552) fits with the lower end of the hexagonal pressure ring (53). The lower ends of the four slide columns (551) are fixedly connected to the upper end of a lower pressure plate (553). A spring (554) is provided between the lower end of the upper pressure plate (552) and the mounting seat (1). The spring (554) is sleeved on the upper end of the outer surface of the slide column (551).

5. A floating seal assembly for a gas valve according to claim 4, characterized in that: The sealing mechanism (5) further comprises a mounting plate (56), a sealing rubber ring (57) and a bottom plate (58); the mounting plate (56) is fixedly connected to the lower end of the lower pressure plate (553); the sealing rubber rings (57) are both arranged at the lower end of the mounting plate (56); and the lower ends of the two sealing rubber rings (57) are both fixedly connected to the upper end of a bottom plate (58).

6. A floating seal assembly for a gas valve according to claim 5, characterized in that: The middle part of the inner wall of the sealing rubber ring (57) is provided with an arc-shaped notch.

7. A floating seal assembly for a gas valve according to claim 5, characterized in that: It also includes a sealing rubber pad 1 (3) and a sealing rubber pad 2 (4), wherein the sealing rubber pad 1 (3) is arranged at the lower end of the mounting seat (1), and the sealing rubber pad 2 (4) is arranged at the lower end of the mounting plate (56).

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