Sealing device
By designing a sealing device supporting the valve seat, valve cover and diaphragm on the breathing valve disc, and using the air cushion structure to provide a buffer zone, the problems of poor sealing and poor fatigue resistance in the prior art are solved, and the sealing effect with low leakage and long life is achieved.
Patent Information
- Application Number
- CN202421537859.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The graphic design of existing breathing valve discs leads to poor sealing, large leakage, and a lack of buffer zone between the sealing plate and the valve seat, resulting in reduced fatigue resistance of the sealing plate and shortened service life.
A sealing device is designed, including a support valve seat, a valve cover and a diaphragm. The valve cover is equipped with a raised inner corrugated surface. The diaphragm contacts the top of the support valve seat to form an air cushion structure, providing a buffer zone, and ensuring the stability of the sealing structure through a combination of a screw, a compression nut and a locking ring.
Through the design of the air cushion structure, the fatigue resistance of the diaphragm is increased, the sealing strength is ensured, and the service life of the diaphragm is extended. Through experimental verification, the diaphragm can still maintain good airtightness after tens of thousands of tests.
Smart Images
Figure CN222894708U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of storage tank sealing, in particular to a sealing device. Background Art
[0002] The valve disc of the breathing valve is an important component of the breathing valve. It maintains the pressure balance of the tank by controlling the opening and closing of the gas channels inside and outside the tank. The working principle of the valve disc is to use the weight of the valve disc to control the positive exhaust pressure and negative intake pressure of the tank. Specifically, when the pressure of the gas in the tank exceeds the allowable pressure value of the tank, the pressure valve is pushed open and the gas escapes from the exhalation port of the breathing valve; and when the vacuum degree of the gas in the tank exceeds the allowable vacuum degree of the tank, the vacuum valve is pushed open and air is inhaled to maintain the pressure balance of the tank.
[0003] The existing valve disc is generally a flat design with a relatively large contact surface, which requires higher flatness and smoothness of the valve disc. During actual operation, the counterweight on the valve disc presses the valve cover. Since the pure flat surface cannot form effective coverage in the entire area, that is, no effective seal can be formed between the valve seat and the valve cover, it is difficult to achieve low leakage, and there is no buffer zone for the collision between the valve seat and the sealing plate. When the valve disc and the sealing plate are lifted up and dropped back many times, they collide with the valve seat together with the sealing plate, which can easily cause damage to the sealing material of the sealing plate, reduce fatigue resistance, and accelerate its service life. Utility Model Content
[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.
[0005] In view of the fact that the above-mentioned valve disc is generally designed as a plane, and there is no collision buffer zone between the valve seat and the sealing plate, and there is no design to ensure a low leakage structure, the present utility model is proposed.
[0006] Therefore, the utility model aims to provide a sealing device.
[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a sealing device, comprising: a sealing assembly, comprising a supporting valve seat, a valve cover used in conjunction with the supporting valve seat, and a diaphragm arranged between the valve cover and the supporting valve seat;
[0008] The installation assembly comprises a screw rod used in conjunction with the valve cover, a compression nut and a locking ring arranged on the screw rod, and a support member arranged on the screw rod.
[0009] As a preferred solution of the sealing device of the utility model, the top of one side of the supporting valve seat is arranged as an inclined surface, and the top end of the supporting valve seat contacts the bottom end of the diaphragm.
[0010] As a preferred solution of the sealing device of the utility model, the top of the valve cover is provided with a raised inner corrugated surface, which is annular and has a distance between it and the top of the diaphragm.
[0011] As a preferred solution of the sealing device of the utility model, the support member includes a metal pad and a counterweight plate arranged on the screw rod, and an asbestos-free pad arranged on the metal pad.
[0012] As a preferred solution of the sealing device of the utility model, the valve cover, diaphragm and support member are all provided with installation grooves in the middle, the diameter of the installation grooves is consistent with the screw, and the valve cover, diaphragm and support member are located between the clamping nut and the locking ring.
[0013] As a preferred solution of the sealing device of the utility model, the diameters of the metal pad and the asbestos-free pad are consistent, the asbestos-free pad is located between the metal pad and the diaphragm, and a plurality of through grooves are formed on the metal pad.
[0014] As a preferred solution of the sealing device of the utility model, wherein: a plurality of through grooves are opened on the metal gasket, the through grooves are arranged at equal distances, and each of the through grooves is provided with a curved surface.
[0015] As a preferred solution of the sealing device of the utility model, wherein: the counterweight plate is located between the valve cover and the locking ring, the counterweight plate is circular in shape, and a circular groove is provided inside the locking ring.
[0016] As a preferred solution of the sealing device of the utility model, the counterweight plate is circular in shape and smaller in size than the valve cover.
[0017] As a preferred solution of the sealing device of the utility model, the size of the valve cover is larger than the diaphragm, and the diameter of the diaphragm is larger than the supporting valve seat.
[0018] The beneficial effects of the utility model are as follows: the utility model uses a sealing component and a raised inner corrugated surface is arranged on the valve cover. At the same time, the contact between the diaphragm and the top of the supporting valve seat will form an air cushion structure. The buffer zone provided by the air cushion structure greatly increases the fatigue resistance of the diaphragm seal, and it has been verified by experiments that the diaphragm can still maintain good air tightness after tens of thousands of tests; through the coordinated use of the installation component and the support, while the sealing structure is installed, the valve cover can also be pressed tightly under the action of gravity through the seeding plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0020] Figure 1 It is an overall schematic diagram of a sealing device.
[0021] Figure 2 A sealing device Figure 1 Schematic diagram from another perspective.
[0022] Figure 3 The present invention is a schematic diagram of a sealing device with a sealing component and a counterweight plate in cross-section.
[0023] Figure 4 for Figure 3 Enlarged view of point A in . DETAILED DESCRIPTION
[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.
[0028] Example 1
[0029] Reference Figure 1 - Figure 4, which is the first embodiment of the utility model, and provides a sealing device, including a sealing assembly 100, including a supporting valve seat 101, a valve cover 102 used in conjunction with the supporting valve seat 101, and a diaphragm 103 arranged between the valve cover 102 and the supporting valve seat 101, and the diaphragm 103 is made of FEP material;
[0030] The mounting assembly 200 includes a screw rod 201 used in conjunction with the valve cover 102 , a compression nut 202 and a locking ring 203 threadedly mounted on the screw rod 201 , and a support member 204 disposed on the screw rod 201 .
[0031] Specifically, the top of one side of the support valve seat 101 is set as an inclined surface, and the top end of the support valve seat 101 is in contact with the bottom end of the diaphragm 103 .
[0032] Furthermore, a raised inner corrugated surface is provided on the top of the valve cover 102, and an air cushion structure is formed inside the raised inner corrugated surface for the diaphragm 103. When supporting the diaphragm 103, deformation space is reserved on the top of the valve seat 101. The raised inner corrugated surface is annularly arranged and there is a distance between the raised inner corrugated surface and the top of the diaphragm 103.
[0033] Operation process: When in use, the top of the support valve seat 101 is used to support the diaphragm 103, and at the same time, the convex inner corrugated surface on the valve cover 102 makes the part where the diaphragm 103 contacts the top of the support valve seat 101 convex upward, such as Figure 3 There are two advantages as shown: Buffering effect: the concave and convex surfaces of the diaphragm 103 and the valve cover 102 form a closed cavity, which protects the diaphragm 103 from direct contact with the valve cover 102 when the valve cover 102 jumps and hits multiple times; the air cushion structure plays a buffering role, and the air cushion structure reserves deformation space for supporting the valve seat 101 and the diaphragm 103. The soft material of the diaphragm 103 has strong deformation ability and is wrapped around the end face of the supporting valve seat 101. The good sealing ensures the low leakage technology of the breathing valve and extends the fatigue resistance and service life of the diaphragm 103.
[0034] Example 2
[0035] Reference Figure 1 - Figure 3 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that the support member 204 includes a metal pad 204a and a counterweight plate 204b sleeved on the screw rod 201, and an asbestos-free pad 204c arranged on the metal pad 204a.
[0036] Specifically, installation grooves are opened in the middle of the valve cover 102, the diaphragm 103 and the support member 204, and the diameter of the installation grooves is consistent with the screw 201, so that the valve cover 102, the diaphragm 103 and the support member 204 can be installed on the screw 201. The valve cover 102, the diaphragm 103 and the support member 204 are located between the clamping nut 202 and the locking ring 203, and are fixed by the clamping nut 202 and the locking ring 203.
[0037] Furthermore, the diameters of the metal pad 204a and the asbestos-free pad 204c are consistent, the asbestos-free pad 204c is located between the metal pad 204a and the diaphragm 103, and a plurality of through grooves are formed on the metal pad 204a.
[0038] Furthermore, a plurality of through slots are formed on the metal pad 204a. The through slots are arranged at equal intervals, and each through slot has a curved surface.
[0039] Furthermore, the weight plate 204b is located between the valve cover 102 and the locking ring 203. The weight plate 204b is circular in shape, and a circular groove is provided inside the locking ring 203. The weight of the weight plate 204b can further tighten the diaphragm 103.
[0040] Furthermore, the weight plate 204 b is circular in shape and smaller in size than the valve cover 102 .
[0041] Furthermore, the size of the valve cover 102 is larger than that of the diaphragm 103 , and the diameter of the diaphragm 103 is larger than that of the supporting valve seat 101 .
[0042] The rest of the structure is the same as that of Example 1.
[0043] Operation process: When in use, unscrew the clamping nut 202 on the screw 201, and then install the counterweight plate 204b, valve cover 102, diaphragm 103, asbestos-free pad 204c and metal pad 204a in turn, and then screw on the clamping nut 202 to fix it. Because the diaphragm 103 is made of a soft material and is prone to deformation, under the action of the gravity of the upper counterweight plate 204b, the valve seat 101 is designed as a narrow circular surface to fully compress the surface of the diaphragm 103 located inside the raised inner corrugated surface of the valve cover 102. At the same time, the weight of the counterweight plate 204b itself can further compress the diaphragm 103.
[0044] Comparative Example 1
[0045] The existing breather valve disc is made of PTFE, an engineering plastic with many unique physical and chemical properties, which is widely used in various industrial and consumer products. Here are some of the main highlights of PTFE: Transparency: Some types of PTFE can transmit ultraviolet light, but are not transparent to visible light; Aging resistance: PTFE is not easy to age, and will not undergo significant physical or chemical changes even if exposed to air for a long time; Moisture resistance: PTFE can maintain its insulating properties even in high humidity environments and will not absorb moisture; Wear resistance: PTFE has high wear resistance and is suitable for applications that require wear resistance, such as bearings and seals.
[0046] FEP (fluorinated ethylene propylene copolymer) and PTFE (polytetrafluoroethylene) are both fluoroplastics with many similar excellent properties, but FEP has its unique advantages over PTFE in some aspects: Flexibility: FEP is softer than PTFE and has better elasticity, which makes FEP more suitable for seals, gaskets, bellows and other occasions that require a certain degree of deformation ability; Low temperature performance: FEP maintains good flexibility at low temperatures, while PTFE may become more brittle at low temperatures; Cost-effectiveness: In some cases, the processing and molding costs of FEP may be lower than PTFE, especially in the manufacture of parts that require complex shapes or fine dimensional control.
[0047] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values (e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.
[0048] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.
[0049] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.
[0050] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.
Claims
1. A sealing device, characterized in that: include, A sealing assembly (100) comprises a supporting valve seat (101), a valve cover (102) used in conjunction with the supporting valve seat (101), and a diaphragm (103) arranged between the valve cover (102) and the supporting valve seat (101); The mounting assembly (200) comprises a screw rod (201) used in conjunction with the valve cover (102), a clamping nut (202) and a locking ring (203) arranged on the screw rod (201), and a support member (204) arranged on the screw rod (201).
2. The sealing device according to claim 1, characterized in that: The top of one side of the support valve seat (101) is arranged as an inclined surface, and the top end of the support valve seat (101) is in contact with the bottom end of the diaphragm (103).
3. The sealing device according to claim 2, characterized in that: The top of the valve cover (102) is provided with a raised inner corrugated surface, which is arranged in an annular shape and has a distance between it and the top end of the diaphragm (103).
4. The sealing device according to claim 2 or 3, characterized in that: The support member (204) comprises a metal pad (204a) and a counterweight plate (204b) arranged on the screw rod (201), and an asbestos-free pad (204c) arranged on the metal pad (204a).
5. The sealing device according to claim 4, characterized in that: The valve cover (102), the diaphragm (103) and the support member (204) are all provided with installation grooves in the middle, and the diameter of the installation grooves is consistent with the screw (201). The valve cover (102), the diaphragm (103) and the support member (204) are located between the clamping nut (202) and the locking ring (203).
6. The sealing device according to claim 5, characterized in that: The diameters of the metal pad (204a) and the asbestos-free pad (204c) are consistent. The asbestos-free pad (204c) is located between the metal pad (204a) and the diaphragm (103). The metal pad (204a) is provided with a plurality of through grooves.
7. The sealing device according to claim 6, characterized in that: The metal pad (204a) is provided with a plurality of through slots, the through slots are arranged at equal intervals, and each of the through slots is provided with a curved surface.
8. The sealing device according to claim 7, characterized in that: The counterweight plate (204b) is located between the valve cover (102) and the locking ring (203); the counterweight plate (204b) is circular in shape, and a circular groove is provided inside the locking ring (203).
9. The sealing device according to claim 8, characterized in that: The counterweight plate (204b) is circular in shape and smaller in size than the valve cover (102).
10. The sealing device according to claim 1 or 9, characterized in that: The size of the valve cover (102) is larger than that of the diaphragm (103), and the diameter of the diaphragm (103) is larger than that of the supporting valve seat (101).