Novel sealing structure of pressure barrel

Abstract

The utility model discloses a novel sealing structure of a pressure barrel, which relates to the technical field of pressure barrels and comprises a barrel body, a rubber inner container and a sealing steel ring, the rubber inner container is positioned in the barrel body, and the sealing steel ring is positioned on the inner side of the edge of the rubber inner container and compresses the edge of the rubber inner container in the barrel body; the outer ring side of the sealing steel ring is provided with a concave surface; a first annular protrusion attached to the concave face of the sealing steel ring is arranged on the inner side of the edge of the rubber inner container. By improving the edge structure of the rubber liner and matching the first annular bulge with the concave surface of the sealing steel ring, the sealing contact area is increased, the axial limit of the rubber liner is increased, the sealing reliability can be effectively improved, and the leakage phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure barrels, in particular to a new sealing structure of a pressure barrel. Background Art

[0002] The pressure tank is an important part of the water purifier. Its main functions include: storing purified water, storing purified water during low water consumption to meet water demand during peak hours; balancing water pressure, stabilizing the water flow of the water purifier, and providing a more stable water supply; reducing the number of starts and stops of the water purifier, and extending the service life of the core components of the water purifier.

[0003] The pressure barrel consists of a barrel body, a PP liner and a rubber liner, forming a water storage layer and a pressure-maintaining layer. The opening of the liner is sealed with the barrel body to stabilize and balance the pressure inside the water storage layer and the pressure-maintaining layer. Once the seal fails, it will cause internal water leakage in the pressure barrel, affecting the use of the water purifier.

[0004] The utility model patent with publication number CN203743416U is a pressure barrel and a water purifier with the pressure barrel; the utility model patent with publication number CN203717900U is a pressure barrel with a sealing structure; both disclose the sealing structure of the pressure barrel, wherein the latter uses an inner ring to press the rubber liner tightly inside the barrel cover for sealing, and only relies on the concave surface of the inner ring to press the relatively flat rubber liner on the inside, resulting in limited axial limit, which will cause the rubber liner to be partially dislocated and detached from the inner ring, thereby causing water leakage problems, and the sealing reliability is not high enough. Utility Model Content

[0005] The purpose of the utility model is to solve the above-mentioned problems in the prior art and provide a new sealing structure for a pressure barrel.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A new sealing structure of a pressure barrel comprises a barrel body, a rubber liner and a sealing steel ring, wherein the rubber liner is located in the barrel body, the sealing steel ring is located on the inner side of the edge of the rubber liner and presses the edge of the rubber liner into the barrel body; the outer ring side of the sealing steel ring has a concave surface; the inner side of the edge of the rubber liner is provided with a first annular protrusion which fits with the concave surface of the sealing steel ring.

[0008] Furthermore, a second annular protrusion is provided on the edge of the rubber liner, the first annular protrusion and the second annular protrusion are parallel, and the first annular protrusion is closer to the inside of the rubber liner than the second annular protrusion.

[0009] Furthermore, the second annular protrusion protrudes from the inner and outer side surfaces of the rubber liner.

[0010] Furthermore, an annular support body is provided inside the second annular protrusion, and the hardness of the support body is greater than the hardness of the rubber liner.

[0011] Furthermore, the barrel wall of the barrel body is provided with an inwardly recessed annular groove, and the position of the annular groove corresponds to the position of the sealing steel ring.

[0012] Furthermore, a PP liner is provided between the rubber liner and the barrel body.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model improves the edge structure of the rubber liner, cooperates with the concave surface of the sealing steel ring through the first annular protrusion, increases the sealing contact area, increases the axial limit of the rubber liner, and can effectively improve the sealing reliability and reduce leakage.

[0015] The utility model further enhances the axial limit of the rubber liner through the second annular protrusion, thereby preventing the rubber liner from being dislocated and separated from the sealing steel ring; the support body can improve the pressure resistance of the sealing structure and enhance the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model.

[0017] Figure 2 This is a schematic diagram of the barrel structure of Example 1 of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of Example 2 of the utility model.

[0019] Figure 4 This is a schematic diagram of the structure of Example 3 of the utility model.

[0020] In the figure: 1. barrel body; 2. rubber liner; 3. sealing steel ring; 4. first annular protrusion; 5. second annular protrusion; 6. support body; 7. annular groove; 8. PP liner. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, 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.

[0023] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "provided with" that may appear should be understood in a broad sense. For example, the object "provided with" may be a part of the body, or may be arranged separately from the body and connected to the body, and the connection may be a detachable connection or an inseparable connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The present invention is further described in detail below in conjunction with the embodiments.

[0026] Specific embodiment 1 of the new sealing structure of the pressure barrel provided by the utility model:

[0027] See also Figure 1-2 The new sealing structure of the pressure barrel includes a barrel body 1, a PP liner 8, a rubber liner 2 and a sealing steel ring 3. The rubber liner 2 is located in the barrel body 1, and the PP liner 8 is located between the rubber liner 2 and the barrel body 1. The barrel body 1 is made of metal, preferably steel.

[0028] The PP liner 8 corresponds to the edge of the liner opening of the rubber liner 2. The sealing steel ring 3 is located inside the edge of the rubber liner 2 and presses the edge of the rubber liner 2 and the edge of the PP liner 8 into the barrel body 1.

[0029] The barrel body 1 has an inwardly recessed annular groove 7 on its barrel wall. The annular groove 7 is formed by rolling to ensure accurate dimensions. The position of the annular groove 7 corresponds to the position of the sealing steel ring 3 .

[0030] The outer ring side of the sealing steel ring 3 has an annular concave surface; in this embodiment, the middle part of each circumference of the sealing steel ring 3 is recessed toward the center of the sealing steel ring 3, so that the vertical cross-section of each part of the sealing steel ring 3 is arc-shaped, and the arc-shaped opening faces outward.

[0031] A first annular protrusion 4 is provided on the inner side of the edge of the rubber liner 2, which fits with the concave surface of the sealing steel ring 3. The cross-sectional shape of the first annular protrusion 4 is surrounded by a straight side and an arc side. The cross-sectional shape of the concave surface of the sealing steel ring 3 is an arc shape. The arc side is the outer contour of the first annular protrusion 4 and can fit with the concave surface of the sealing steel ring 3.

[0032] In this embodiment, the first annular protrusion 4 cooperates with the concave surface of the sealing steel ring 3, and while the sealing steel ring 3 presses the rubber liner 2 and the PP liner 8, the sealing steel ring 3 is not easily misaligned with the rubber liner 2, thereby increasing the sealing contact area, alleviating the stress release in the metal barrel body 1, increasing the axial limit of the rubber liner 2, and reducing the edge misalignment of the rubber liner 2, which can effectively improve the sealing reliability and reduce leakage.

[0033] Specific embodiment 2 of the new sealing structure of the pressure barrel provided by the utility model:

[0034] The difference between this embodiment and embodiment 1 is that: Figure 3 As shown, the edge of the rubber liner 2 is also provided with a second annular protrusion 5, which protrudes from the inner and outer sides of the rubber liner 2. The first annular protrusion 4 and the second annular protrusion 5 are parallel, and the first annular protrusion 4 is closer to the inside of the rubber liner 2 than the second annular protrusion 5.

[0035] The second annular protrusion 5 is located outside the sealing steel ring 3 at the opening of the rubber liner 2, further enhancing the axial limit to prevent the rubber liner 2 from being misaligned and separated from the sealing steel ring 3. The second annular protrusion 5 protrudes on both sides of the rubber liner 2, and its inner protrusion can contact the sealing steel ring 3, and the outer protrusion compensates for the gap between the edge of the rubber liner 2 and the inner side of the barrel body 1.

[0036] Specific embodiment 3 of the new sealing structure of the pressure barrel provided by the utility model:

[0037] The difference between this embodiment and embodiment 2 is that: Figure 4As shown, an annular support body 6 is inserted into the second annular protrusion 5. The hardness of the support body 6 is greater than that of the rubber liner 2. The support body 6 can be made of hard plastic and inserted into the second annular protrusion 5 at the edge of the rubber liner 2. Due to the existence of the support body 6, even if it is subjected to a large pressure, the edge of the rubber liner 2 will not be separated from the sealing steel ring 3 due to the poor deformation ability of the support body 6. In this embodiment, when installing the rubber liner 2, it is necessary to first place the sealing steel ring 3 into the rubber liner 2 and match it with the first annular protrusion 4, and then install the rubber liner 2 in the barrel body 1; it is not possible to first install the rubber liner 2 in the barrel body 1 and then install the sealing steel ring 3.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A novel sealing structure for a pressure barrel, comprising a barrel body (1), a rubber liner (2) and a sealing steel ring (3), wherein the rubber liner (2) is located in the barrel body (1), the sealing steel ring (3) is located on the inner side of the edge of the rubber liner (2) and presses the edge of the rubber liner (2) tightly into the barrel body (1); the outer ring side of the sealing steel ring (3) has a concave surface; the characteristics are: A first annular protrusion (4) is provided on the inner side of the edge of the rubber liner (2) and is fitted with the concave surface of the sealing steel ring (3).

2. The novel sealing structure of the pressure barrel according to claim 1 is characterized in that: A second annular protrusion (5) is provided on the edge of the rubber liner (2); the first annular protrusion (4) and the second annular protrusion (5) are parallel; and the first annular protrusion (4) is closer to the interior of the rubber liner (2) than the second annular protrusion (5).

3. The novel sealing structure of the pressure barrel according to claim 2 is characterized in that: The second annular protrusion (5) protrudes from the inner and outer side surfaces of the rubber liner (2).

4. The novel sealing structure of the pressure barrel according to claim 2 or 3 is characterized in that: An annular support body (6) is inserted into the interior of the second annular protrusion (5), and the hardness of the support body (6) is greater than the hardness of the rubber liner (2).

5. The novel sealing structure of the pressure barrel according to claim 1 is characterized in that: The barrel body (1) has an inwardly recessed annular groove (7) on the barrel wall, and the position of the annular groove (7) corresponds to the position of the sealing steel ring (3).

6. The novel sealing structure of the pressure barrel according to claim 1 is characterized in that: A PP liner (8) is provided between the rubber liner (2) and the barrel body (1).

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