Sealing assembly structure and high-pressure pressure sensor

Abstract

The utility model provides a sealing assembly structure which comprises a threaded head in threaded connection with an assembly base, an engagement part is arranged at the bottom end of the threaded head, a sealing groove is formed in the engagement part, and a concave part is formed on the end face of the sealing groove; the sealing block is arranged in the sealing groove; when the thread head is matched with the assembling base, the meshing part is meshed with the assembling face of the assembling base to form a first sealing part, the sealing block is subjected to plastic deformation, and the gap of the sealing groove and the concave part are filled with the sealing block, so that a second sealing part is formed. According to the sealing assembly structure and the high-pressure pressure sensor disclosed by the utility model, the safety design redundancy of the high-pressure pressure sensor can be realized.

Description

Technical Field

[0001] The utility model relates to a high-pressure pressure sensor, in particular to a sealing assembly structure and a high-pressure pressure sensor. Background Art

[0002] With the continuous development of science and technology, the sealing performance of high-pressure pressure sensors has gradually become one of the key performance indicators that determine the safety of the entire vehicle, especially in the application of hydrogen fuel cell vehicles. Since the high-pressure pressure sensor is connected to the hydrogen tank and the gas molecules of hydrogen are small, hydrogen leakage will cause serious vehicle safety problems. Therefore, the sealing performance requirements of high-pressure pressure sensors are extremely high.

[0003] However, the existing high-pressure pressure sensor has low safety design redundancy, and when the high-pressure pressure sensor is used in hydrogen fuel cell vehicles, the high-pressure pressure sensor may have a gap between the thread head and the assembly base due to the different thermal expansion coefficients of the thread head and the assembly base in a low-temperature environment, which may lead to hydrogen leakage and pose a great safety hazard. Therefore, there is room for improvement. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sealing assembly structure and a high-pressure pressure sensor, which solves the problem of low redundancy in safety design of the high-pressure pressure sensor.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model provides a sealing assembly structure, comprising:

[0007] A threaded head, threadedly connected to the assembly base, a bottom end of the threaded head is provided with a bite portion, a sealing groove is formed in the bite portion, and a recessed portion is formed on the end surface of the sealing groove; and

[0008] A sealing block, disposed in the sealing groove;

[0009] When the threaded head cooperates with the assembly base, the engaging portion engages with the assembly surface of the assembly base to form a first sealing portion, and the sealing block undergoes plastic deformation and fills into the gap of the sealing groove and the recessed portion to form a second sealing portion.

[0010] In an embodiment of the present invention, a protrusion is provided on the assembly surface of the assembly base, and the position of the protrusion corresponds to the recessed portion.

[0011] In an embodiment of the present invention, the cross-sectional shape of the protrusion along the axial direction of the thread head is the same as the cross-sectional shape of the recessed portion along the axial direction of the thread head.

[0012] In an embodiment of the utility model, a medium through hole is formed in the axial direction of the threaded head, and the medium through hole is communicated with the sealing groove.

[0013] In an embodiment of the present invention, the recessed portion is arranged in a ring shape around the medium through hole.

[0014] In an embodiment of the present invention, the sealing groove is symmetrically arranged along the central axis of the threaded head, and the distance between the recessed portion and the central axis of the threaded head is equal.

[0015] In an embodiment of the present invention, the bite portion is arranged in a circular ring shape, and the inner diameter of the bite portion is greater than or equal to the outer diameter of the sealing block.

[0016] In an embodiment of the utility model, a through opening is formed on the sealing block, and the position of the through opening corresponds to the medium through hole.

[0017] In an embodiment of the present invention, when the sealing block is in an un-extruded state, the height of the sealing block is greater than the depth of the sealing groove.

[0018] The utility model also provides a high-pressure pressure sensor, comprising the sealing assembly structure as described in any one of the above items.

[0019] As described above, the utility model provides a sealing assembly structure and a high-pressure pressure sensor, by arranging a recessed portion and a sealing block in a threaded head, and causing the sealing block to undergo plastic deformation under the action of assembly extrusion to fill the gap in the sealing groove and the recessed portion, thereby forming a second sealing portion, thereby achieving safety design redundancy of the high-pressure pressure sensor and improving the safety sealing performance of the high-pressure pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are 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 creative work.

[0021] Figure 1 Shown is a partial cross-sectional view of a high-pressure pressure sensor of the utility model;

[0022] Figure 2 Display as Figure 1 Schematic diagram of the local structure in;

[0023] Figure 3 Display as Figure 2 Schematic diagram of the local structure;

[0024] Figure 4 Display as Figure 3 A magnified view of the structure in the middle;

[0025] Figure 5 Display as Figure 1 Schematic diagram of unassembled parts in ;

[0026] Figure 6 Shown is a partial front view of a high-pressure pressure sensor of the present utility model.

[0027] Component number description:

[0028] 100. High pressure pressure sensor; 110. Sealing assembly structure;

[0029] 120, threaded head; 121, medium through hole; 122, bite portion; 123, sealing groove;

[0030] 130, recessed portion; 140, sealing block; 150, raised portion;

[0031] 160. Assembly base; 161. Threaded groove; 162. Base through hole. DETAILED DESCRIPTION

[0032] 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 of 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.

[0033] See also Figure 1 The utility model provides a sealing assembly structure, which can be applied to a pressure sensor of an automobile, especially a high-pressure pressure sensor of a hydrogen fuel cell automobile, to achieve safety design redundancy of the high-pressure pressure sensor and improve the overall safety performance of the hydrogen fuel cell automobile. The sealing assembly structure 110 may include but is not limited to a threaded head 120.

[0034] See also Figure 1 , Figure 2 and Figure 3 The thread head 120 can be connected to the assembly base, and the thread head 120 can be arranged in the thread groove of the assembly base to achieve a sealing fit between the circumference of the thread head 120 and the inner wall of the thread groove. The thread head 120 can be in the shape of a thread column or other shapes. The side wall of the thread head 120 can be provided with a thread that can fit with the inner wall of the thread groove, so as to achieve a sealing fit between the thread head 120 and the thread groove.

[0035] See also Figure 1 , Figure 2 and Figure 3 , further, a medium through hole 121 may be formed in the axial direction of the threaded head 120. Among them, the medium through hole 121 may be set downward from the top of the threaded head 120, the position of the medium through hole 121 may correspond to the base through hole of the assembly base, and the medium through hole 121 may be located in the middle position of the threaded head 120. The medium through hole 121 may be provided with one, two, or other numbers. When one medium through hole 121 is provided, one medium through hole 121 may be provided at the central axis position of the threaded head 120. However, it is not limited to this, and the medium through hole 121 may also be provided at other positions of the threaded head 120, as long as the position of the medium through hole 121 can correspond to the base through hole on the assembly base. When multiple medium through holes 121 are provided, multiple medium through holes 121 may be evenly arranged in the threaded head 120.

[0036] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 Furthermore, the bottom end of the threaded head 120 may be provided with an engaging portion 122, and a sealing groove 123 may be formed in the engaging portion 122. The engaging portion 122 may be provided on the outer circumferential surface of the threaded head 120, so that when the threaded head 120 is matched with the assembly base, the engaging portion 122 can engage with the assembly surface of the assembly base to form a first sealing portion. In addition, the engaging portion 122 may be provided in a circular ring shape, and the inner diameter of the engaging portion 122 is greater than or equal to the outer diameter of the sealing block 140. The difference between the inner and outer diameters of the engaging portion 122 may be 0.2 mm, 0.3 mm, or other values. When the threaded head 120 is screwed into the thread groove, the engaging portion 122 engages with the assembly surface of the assembly base under the tightening force of the threaded head 120 to form a first sealing portion.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 4, the sealing groove 123 can be symmetrically arranged along the central axis of the threaded head 120, and the sealing groove 123 can be connected with the medium through hole 121. That is, the opening of the sealing groove 123 can be oriented in the direction of the assembly base, and the sealing groove 123 can be arranged from the bottom end of the threaded head 120 to the direction of the medium through hole 121 until it is connected with the medium through hole 121. Among them, the base through hole of the assembly base, the sealing groove 123 and the medium through hole 121 can be connected in sequence to form a sensing channel. Among them, the sensing channel can be an oil inlet channel or an air inlet channel, that is, the sensing channel can be suitable for both oil and liquid sealing passage and gas sealing passage. For example, when the sealing assembly structure 110 is assembled into a pressure sensor of a fuel vehicle, the base through hole of the assembly base, the sealing groove 123 and the medium through hole 121 can be connected in sequence to form an oil inlet channel. When the sealing assembly structure 110 is assembled into a high-pressure pressure sensor of a hydrogen fuel cell vehicle or other gas energy vehicle, the base through hole of the assembly base, the sealing groove 123 and the medium through hole 121 can be connected in sequence to form an air intake channel.

[0038] See also Figure 1 and Figure 2 and Figure 5 , at least one recessed portion 130 may be formed on the end surface of the sealing groove 123. The recessed portion 130 is arranged in a ring shape around the medium through hole 121, and the distance between the recessed portion 130 and the central axis of the threaded head 120 is equal. The cross-section of the recessed portion 130 may be triangular, square, or rectangular. However, it is not limited to this, and the cross-section of the recessed portion 130 may also be other shapes. In addition, the central axis of the recessed portion 130 and the central axis of the medium through hole 121 may coincide with each other. When the central axis of the recessed portion 130 and the central axis of the medium through hole 121 coincide with each other, the medium through hole 121 is located at the center of the recessed portion 130. For example, please refer to Figure 5 The cross section of the recessed portion 130 is triangular, the recessed portion 130 is arranged in a ring shape around the medium through hole 121, and the central axis of the recessed portion 130 coincides with the central axis of the medium through hole 121.

[0039] See also Figure 1 and Figure 5, further, the sealing assembly structure 110 may also include but is not limited to a sealing block 140, and the sealing block 140 may be arranged in the sealing groove 123. Wherein, when the threaded head 120 is matched with the assembly base, the sealing block 140 may be plastically deformed and filled into the gap of the sealing groove 123 and the recessed portion 130 to form a second sealing portion, thereby achieving the sealing of the sensing channel. Wherein, the matching mode between the sealing block 140 and the side wall of the sealing groove 123 may not be specifically limited, as long as when the threaded head 120 is matched with the assembly base, the sealing block 140 may be plastically deformed and filled into the gap between the sealing groove 123 and the side wall of the sealing block 140 to achieve sealing. The sealing block 140 may be a metal cushion, or other low temperature resistant and highly plastic material, so that when the threaded head 120 is assembled into the assembly base, the sealing block 140 can be plastically deformed under the action of the tightening force to fill the recessed portion 130 and the gap of the sealing groove 123. In addition, when the sealing block 140 is a metal cushion, in a low temperature environment, the metal cushion can continue to shrink inwards so that the sensing channel is always in a sealed state.

[0040] See also Figure 1 , Figure 2 and Figure 5 , further, a through opening may be formed on the sealing block 140, and the position of the opening may correspond to the position of the medium through hole 121 and the base through hole of the assembly base, respectively, to form a sensing channel. In addition, the minimum cross-sectional length of the opening in the sealing block 140 is greater than the maximum cross-sectional length of the base through hole of the assembly base. The inner diameter of the opening in the sealing block 140 may be smaller than the inner diameter of the recessed portion 130, so as to facilitate filling the recessed portion 130. Among them, when the sealing block 140 is in an unextruded state, the height of the sealing block 140 may be greater than the depth of the sealing groove 123, so as to increase the deformation of the sealing block 140 during assembly. When the sealing block 140 is in an extruded state, the portion of the sealing block 140 that undergoes plastic deformation may fill the gap of the sealing groove 123 and the recessed portion 130 to form a second sealing portion, so that the base through hole of the assembly base, the opening of the sealing block 140 and the medium through hole 121 form a sealed channel.

[0041] See also Figure 1 and Figure 2, a protrusion 150 may be provided on the assembly surface of the assembly base, and the position of the protrusion 150 may correspond to the recessed portion 130, so that when the sealing block 140 undergoes plastic deformation under the extrusion, a part of the area of ​​the sealing block 140 can be accurately filled into the recessed portion 130 to enhance the sealing effect of the formed second sealing portion. In addition, the protrusion 150 may be arranged in a circular ring shape, and the minimum cross-sectional length of the inner hollow part of the protrusion 150 is greater than or equal to the maximum cross-sectional length of the base through hole of the assembly base. The inner diameter of the protrusion 150 may be greater than the inner diameter of the through hole in the sealing block 140, so as to facilitate the lifting of the sealing block 140. In order to further enhance the sealing effect of the second sealing portion, the cross-sectional shape of the protrusion 150 along the axial direction of the thread head 120 and the cross-sectional shape of the recessed portion 130 along the axial direction of the thread head 120 may be the same, so that under the lifting effect of the protrusion 150, the protruding area of ​​the sealing block 140 can accurately match the recessed portion 130. For example, the cross section of the protrusion 150 along the axial direction of the thread head 120 can be a triangle, a square, or a rectangle. However, it is not limited thereto, and the cross section of the protrusion 150 along the axial direction of the thread head 120 can also be other shapes, as long as its axial cross section shape is the same as the axial cross section shape of the recessed portion 130.

[0042] See also Figure 1 and Figure 2 Furthermore, the height of the protrusion 150 can be less than the depth of the sealing groove 123, so as to facilitate the matching of the thread head 120 and the assembly base. The central axis of the protrusion 150 can coincide with the central axis of the base through hole of the assembly base, but it is not limited to this. The central line of the protrusion 150 can also not coincide with the central axis of the base through hole of the assembly base, as long as the base through hole of the assembly base is located in the inner hollow part of the protrusion 150. For example, refer to Figure 1 The axial cross-section of the protrusion 150 is triangular, and the central axis of the protrusion 150 coincides with the central axis of the base through hole of the assembly base, so as to form an oil inlet channel or an air inlet channel.

[0043] See also Figure 1 , Figure 2 , Figure 5 and Figure 6The utility model also provides a high-pressure pressure sensor. The high-pressure pressure sensor 100 may include a sealing assembly structure 110, and the high-pressure pressure sensor 100 may be applied to automobiles, especially hydrogen fuel cell vehicles, to achieve safety design redundancy for hydrogen fuel cell vehicles and improve the overall safety performance of hydrogen fuel cell vehicles. In addition, the high-pressure pressure sensor 100 may also include but is not limited to an assembly base 160, and the assembly base 160 may be arranged on the oil rail or gas rail of the automobile to achieve oil or gas intake. In order to facilitate the assembly of the sealing assembly structure 110, a thread groove 161 may be formed on the top of the assembly base 160 to facilitate the cooperation between the sealing assembly structure 110 and the assembly base 160. A base through hole 162 may also be formed in the assembly base 160, and one end of the base through hole 162 may be connected to the thread groove 161, and the other end of the base through hole 162 may be connected to the oil rail or the gas rail.

[0044] See also Figure 1 , Figure 2 , Figure 3 and Figure 5 Specifically, first, a medium through hole 121 can be opened downward from the top of the thread head 120, and the position of the medium through hole 121 corresponds to the base through hole 162 of the assembly base 160. Then, a sealing groove 123 is opened at the other end of the thread head 120, and the opening of the sealing groove 123 can be oriented toward the direction where the assembly base 160 is located, and the sealing groove 123 reaches the bottom end plane of the medium through hole 121 from the bottom end of the thread head 120, and the sealing groove 123 is connected to the medium through hole 121.

[0045] See also Figure 2 , Figure 3 and Figure 5 , further, it is necessary to set a circle of recessed parts 130 on the top surface of the sealing groove 123. The recessed part 130 is arranged in a ring shape around the medium through hole 121, and the distance between the recessed part 130 and the central axis of the threaded head 120 is equal. Subsequently, it is also necessary to set a protrusion 150 on the assembly surface of the assembly base 160, and the position of the protrusion 150 can correspond to the recessed part 130, so that when the sealing block 140 undergoes plastic deformation under the extrusion, its part of the area can be accurately filled into the recessed part 130, so as to improve the sealing effect of the formed second sealing part.

[0046] See also Figure 1 , Figure 2 and Figure 5, wherein the raised portion 150 can also be arranged in an annular shape, and the minimum cross-sectional length of the inner hollow portion of the raised portion 150 is greater than or equal to the maximum cross-sectional length of the base through hole 162 of the assembly base 160. In order to further improve the sealing effect of the second sealing portion, the cross-sectional shape of the raised portion 150 along the axial direction of the thread head 120 is the same as the cross-sectional shape of the recessed portion 130 along the axial direction of the thread head 120, so that the raised area of ​​the sealing block 140 can accurately match the recessed portion 130 under the lifting effect of the raised portion 150. That is, the cross-sectional shape of the raised portion 150 is also triangular. The height of the raised portion 150 is less than the depth of the sealing groove 123, so that the thread head 120 and the thread groove 161 can be matched, and the central axis of the raised portion 150 coincides with the central axis of the base through hole 162 of the assembly base 160.

[0047] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 Furthermore, it is also necessary to provide an engaging portion 122 on the outer circumferential surface of the end of the threaded head 120, so that when the threaded head 120 is matched with the assembly base 160, the engaging portion 122 can engage with the assembly surface of the assembly base 160 to form a first sealing portion. The engaging portion 122 can be provided in a circular ring shape, and the inner diameter of the engaging portion 122 is greater than the outer diameter of the sealing block 140, and the difference between the inner and outer diameters of the engaging portion 122 can be 0.2 mm.

[0048] See also Figure 1 and Figure 5, then, after the occlusal portion 122 is set, a sealing block 140 can be assembled on the sealing groove 123. The sealing block 140 is a metal cushion, so that when the threaded head 120 is assembled into the assembly base 160, the sealing block 140 can be plastically deformed under the action of the tightening force to fill the gap of the sealing groove 123 and the recessed portion 130. In addition, when the sealing block 140 is a metal cushion, the metal cushion can continue to shrink in a low temperature environment so that the sensing channel is always in a sealed state. Then, the threaded head 120 is screwed into the threaded groove 161 of the assembly base 160, and as the threaded head 120 gradually penetrates, the sealing block 140 contacts the protrusion 150 on the bottom wall of the threaded groove 161. Under the extrusion and tightening of the threaded head 120 and the lifting action of the protrusion 150, the overall structure of the sealing block 140 is radially deformed under the extrusion action and filled into the gap between the side wall of the sealing block 140 and the side wall of the sealing groove 123. On the other hand, under the lifting action of the protrusion 150, the contact area of ​​the sealing block 140 and the protrusion 150 is axially deformed, and since the position of the recess 130 corresponds to the protrusion 150, the area of ​​the sealing block 140 that is axially deformed can be filled into the recess 130. At this point, the sealing block 140 forms a second sealing portion under the cooperation of the protrusion 150 and the recess 130, which can achieve sealing of the inside of the sealing block 140.

[0049] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 Furthermore, as the thread head 120 is tightened further, the thread head 120 continues to penetrate into the thread groove 161, and the engaging portion 122 at the bottom of the thread head 120 engages with the bottom wall of the thread groove 161 under the extrusion of the thread head 120, and the portion of the thread head 120 around the engaging portion 122 cooperates with the bottom wall of the thread groove 161 under the engagement of the engaging portion 122 to form a first sealing portion. At this point, the assembly of the high-pressure pressure sensor 100 is completed.

[0050] In summary, through a sealing assembly structure and a high-pressure pressure sensor provided by the utility model, a recessed portion and a sealing block are arranged in the threaded head, and the sealing block is plastically deformed under the action of assembly extrusion to fill the gap in the sealing groove and the recessed portion, thereby forming a second sealing portion, thereby realizing safety design redundancy of the high-pressure pressure sensor, preventing leakage of the measuring medium, and improving the safety sealing performance of the high-pressure pressure sensor, thereby improving the overall safety performance of the automobile.

[0051] In the description of this specification, the description with reference to the terms "this embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The embodiments of the utility model disclosed above are only used to help illustrate the utility model. The embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sealing assembly structure, characterized in that: include: A threaded head, threadedly connected to the assembly base, a bottom end of the threaded head is provided with a bite portion, a sealing groove is formed in the bite portion, and a recessed portion is formed on the end surface of the sealing groove; and A sealing block, disposed in the sealing groove; When the threaded head cooperates with the assembly base, the engaging portion engages with the assembly surface of the assembly base to form a first sealing portion, and the sealing block undergoes plastic deformation and fills into the gap of the sealing groove and the recessed portion to form a second sealing portion.

2. The sealing assembly structure according to claim 1, characterized in that: A convex portion is arranged on the assembly surface of the assembly base, and the position of the convex portion corresponds to the concave portion.

3. The sealing assembly structure according to claim 2, characterized in that: The cross-sectional shape of the protrusion along the axial direction of the thread head is the same as the cross-sectional shape of the recessed portion along the axial direction of the thread head.

4. The sealing assembly structure according to claim 1, characterized in that: A medium through hole is formed in the axial direction of the threaded head, and the medium through hole is communicated with the sealing groove.

5. The sealing assembly structure according to claim 4, characterized in that: The recessed portion is arranged in a ring shape around the medium through hole.

6. The sealing assembly structure according to claim 5, characterized in that: The sealing grooves are symmetrically arranged along the central axis of the threaded head, and the distances between the recessed portions and the central axis of the threaded head are equal.

7. The sealing assembly structure according to any one of claims 1 to 6, characterized in that: The bite portion is arranged in a circular ring shape, and the inner diameter of the bite portion is greater than or equal to the outer diameter of the sealing block.

8. The sealing assembly structure according to claim 4, characterized in that: The sealing block is formed with a through opening, and the position of the through opening corresponds to the medium through hole.

9. The sealing assembly structure according to claim 1, characterized in that: When the sealing block is in an un-pressed state, the height of the sealing block is greater than the depth of the sealing groove.

10. A high pressure sensor, characterized in that: The invention comprises a sealing assembly structure as claimed in any one of claims 1 to 9.

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