Water valve sealing gasket structure capable of achieving 360-degree sealing through lap joint

Abstract

The invention discloses a water valve sealing gasket structure capable of achieving 360-degree sealing through lap joint, and relates to the technical field of water valve sealing, the water valve sealing gasket structure comprises a sealing gasket body, the sealing gasket body can be wound into an end-to-end connected cylindrical structure from an unfolded and tiled state, and a lap joint head and a sealing limiting head are arranged at the two free ends of the end-to-end connected position of the sealing gasket body correspondingly; a plurality of flow holes are formed in the sealing gasket body; when the sealing gasket bodies are in lap joint and matched end to end, the inner side flow limiting area, the transverse sealing area and the outer side flow limiting area are formed between the opposite faces of the sealing gasket bodies, and a small gap between the inner side flow limiting area and the outer side flow limiting area plays a flow limiting role, so that the sealing pressure of the transverse sealing area is reduced; the transverse sealing area can also achieve a good sealing effect under the interference fit of extrusion force; therefore, a 360-degree structure is achieved, the upper limit of the number of the flow holes is improved, and meanwhile the problems that the structure is complex and the cost is increased due to the series-parallel connection mode of the valve set and the use of a check block are solved.

Description

Technical Field

[0001] The invention relates to the technical field of water valve sealing, and in particular to a water valve sealing pad structure that is overlapped to achieve 360-degree sealing. Background Art

[0002] In the multi-way valve of the thermal management system of new energy vehicles, the water valve gasket acts on the switch seal of the water valve. The failure of the water valve gasket will directly lead to the failure of the multi-way valve, resulting in liquid leakage and instability of the working state of the multi-way valve, thereby affecting the normal operation of the thermal management system;

[0003] Since the water valve gasket has a certain elasticity, if it is directly processed into a 360° sealing structure, the following problems will arise: (1) The molding cavity of the processing mold is a closed cavity, and the processing quality is difficult to guarantee and it cannot be demolded; (2) It is difficult to adapt to the slight deformation and unevenness of the valve sealing surface, so it cannot completely fit with certain positions, and it is impossible to make adaptive adjustments, which leads to leakage; (3) It is difficult to ensure that all parts of the 360° one-piece molded gasket are completely in fit with the valve sealing surface during installation, and installation and correction are difficult.

[0004] Especially in the case of large flow, the above situation is particularly obvious. The current technology basically adopts the form of 270° multi-stage multi-group valve with block to ensure large flow, which leads to a relatively complex structure, and the use of hard block also greatly increases the cost of water valve gasket; at the same time, this combination method also limits the flow of the assembly switch, and more valve groups need to be connected in series or in parallel, further increasing the cost and structural complexity. To this end, we provide a water valve gasket structure that overlaps to achieve 360° sealing. Summary of the invention

[0005] The object of the present invention is to provide a water valve sealing gasket structure which can overlap and realize 360° sealing.

[0006] The technical problems solved by the present invention are:

[0007] (1) The existing water valve gasket products cannot achieve 360° one-piece sealing and need to be sealed by interference fit through accessories such as blocks;

[0008] (2) The flow rate of the assembly switch is insufficient, and it can only be connected in series or in parallel through more valve groups, which leads to high costs.

[0009] The present invention can be implemented through the following technical scheme: a water valve sealing gasket structure that can be overlapped to achieve 360° sealing, including a sealing gasket body, which can be rolled up from an unfolded and laid state to become a cylindrical structure connected end to end, and the two free ends of the sealing gasket body at the end-to-end connection position are respectively provided with overlap joints and sealing limit heads, and a plurality of flow holes are opened on the sealing gasket body. The 360° water valve sealing gasket structure can open more flow holes than the sealing structure formed by the cooperation of the 270° product and the block, thereby reducing or avoiding the use of valve groups in series and parallel.

[0010] A further technical improvement of the present invention is that when the lap joint and the sealing limit head are overlapped, three areas are formed between their opposite surfaces, including an inner flow limiting area, a transverse sealing area and an outer flow limiting area.

[0011] A further technical improvement of the present invention is that when the sealing gasket body is installed and used in a cylindrical structure, its force direction is radial. In the inner flow limiting area and / or the outer flow limiting area, the normal lines of the relative surfaces of the lap joint and the sealing limit head are different from the force direction, resulting in a fitting gap and forming a flow limit.

[0012] A further technical improvement of the present invention is that in the transverse sealing area, the normal lines of the relative surfaces of the lap joint and the sealing limit head are consistent with the force direction, resulting in an interference fit and forming a seal.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention achieves end-to-end connection by winding the sealing gasket body into a cylindrical structure. When the lap joints at the head and tail are overlapped with the sealing limit heads, three areas are formed between their opposite surfaces, including an inner flow limiting area, a transverse sealing area and an outer flow limiting area. The small gaps between the inner and outer limit areas play a flow limiting role, thereby reducing the sealing pressure of the transverse sealing area. In valve groups with larger calibers or flow rates, the transverse sealing area can also achieve a good sealing effect under the interference fit of the extrusion force; thereby, a 360-degree structure is realized, the upper limit of the number of flow holes is increased, and good sealing is guaranteed, thereby avoiding the problems of complex structure and increased cost caused by the series-parallel form of the valve group and the use of blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the structure of the demoulding state of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the working assembly state of the present invention;

[0018] Figure 3For the present invention Figure 2 A partial enlarged schematic diagram of the structure at point A in the middle.

[0019] In the figure: 1, sealing gasket body; 101, flow hole; 102, lap joint; 103, limit sealing head; a, inner flow limiting area; b, lateral sealing area; c, outer flow limiting area. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0021] See also Figure 1-3 As shown, a water valve sealing gasket structure that overlaps to achieve 360° sealing includes a sealing gasket body 1. The sealing gasket body 1 is in a flattened state as shown in FIG. Figure 1 In the rectangular state shown, the left and right sides of the sealing gasket body 1 are respectively provided with a lap joint 102 and a limit sealing head 103;

[0022] When the sealing gasket body 1 is installed and used, the overlap joint 102 is brought into contact with the limiting sealing head 103, so that the ends are connected to form a cylindrical structure, and a 360° sealed water valve sealing gasket structure in an overlapped state is obtained. Figure 2 As shown;

[0023] A plurality of flow holes 101 are provided on the side wall of the cylindrical sealing gasket body 1. The number of the flow holes 101 is significantly greater than that of the sealing structure formed by the cooperation of the 270° product and the block in the prior art, which can meet a larger flow demand, thereby eliminating the structural complexity and cost increase caused by the parallel or series structure of the valve group;

[0024] like Figure 3 As shown, in this overlap structure, the matching areas of the overlap joint 102 and the limiting sealing head 103 include three, namely, the inner flow limiting area a, the lateral sealing area b and the outer flow limiting area c. After the sealing gasket of the overlap structure is assembled, the overlap portion is squeezed and deformed, and the force directions of the inner flow limiting area a and the outer limit area c are both in the radial direction along the rotation axis. The normal direction of the matching surface of the overlap joint 102 and the limiting sealing head 103 in the inner flow limiting area a and the outer limit area c is inconsistent with the force direction, so that the sealing effect cannot be achieved. However, due to the existence of the small gap, the flow limiting effect can be achieved.

[0025] In the transverse sealing area b, the normal direction of the relative mating surfaces of the lap joint 102 and the limiting sealing head 103 is consistent with the force direction, and the transverse functional sealing can be achieved through the deformation force of the extrusion interference. Due to the existence of the inner and outer limiting areas, the sealing requirements for the transverse sealing area b are weakened, so that the sealing effect of the transverse sealing area b can meet the sealing requirements, and then the flow transportation control of a larger cross-sectional area can be achieved, thereby reducing costs and improving efficiency.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A water valve sealing gasket structure with overlapping to achieve 360° sealing, characterized in that: The invention comprises a sealing gasket body (1), which can be rolled up from an unfolded flat state into a cylindrical structure with end-to-end connection, and the two free ends of the sealing gasket body (1) at the end-to-end connection position are respectively provided with a lap joint (102) and a sealing limit head (103), and the sealing gasket body (1) is provided with a plurality of flow holes (101).

2. A water valve sealing gasket structure for overlapping and achieving 360° sealing according to claim (1), characterized in that: When the overlap joint (102) and the sealing limit head (103) are overlapped, three areas are formed between their opposing surfaces, including an inner flow limiting area (a), a transverse sealing area (b) and an outer flow limiting area (c).

3. A water valve sealing gasket structure with overlapping to achieve 360° sealing according to claim 2, characterized in that: When the sealing gasket body (1) is installed in a cylindrical structure for use, the force direction is radial. In the inner flow limiting area (a) and / or the outer flow limiting area (c), the normal lines of the relative surfaces of the lap joint (102) and the sealing limit head (103) are different from the force direction, resulting in a matching gap and forming a flow limit.

4. A water valve sealing gasket structure with overlapping to achieve 360° sealing according to claim 3, characterized in that: In the transverse sealing area (b), the normal lines of the opposing surfaces of the lap joint (102) and the sealing limit head (103) are consistent with the force direction, thereby generating an interference fit and forming a seal.

Images