Sealing ring mounting structure

Abstract

The utility model provides a seal ring installation structure, which comprises a shell, a zeroing ferrule, a seal ring and an elastic limiting piece, a zeroing installation hole is arranged on the shell, an annular blocking surface is arranged in the middle of an inner hole, an annular thrust surface is further arranged in the middle of the zeroing ferrule, the annular blocking surface is matched with the annular thrust surface, and the elastic limiting piece is arranged on the shell. The zero-setting ferrule is provided with an outer hole, the zero-setting ferrule is provided with an annular blocking face, the zero-setting ferrule is further provided with an annular installation groove, the sealing ring is arranged in the annular installation groove, the elastic limiting piece is clamped on the inner wall of the outer hole, and the elastic limiting piece is used for limiting the zero-setting ferrule. One end of the zero-setting insertion core is connected with the elastic limiting piece, the other end of the zero-setting insertion core is limited by the elastic limiting piece, it is ensured that the zero-setting insertion core does not displace, the sealing effect is ensured, when the sealing ring needs to be replaced, the zero-setting insertion core can be taken out and the sealing ring can be rapidly replaced only by releasing limiting of the elastic limiting piece on the zero-setting insertion core, the structure compactness is high, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of instrumentation equipment, in particular to a sealing ring installation structure. Background Art

[0002] Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electrical signals to supply secondary instruments such as indicator alarms, recorders, regulators, etc. for measurement, indication and process regulation.

[0003] Pressure transmitters debugged by analog circuits have the advantages of fast response speed, strong anti-static ability and on-site zero adjustment and calibration, and are widely used. However, the transmitter will have output zero drift during long-term use and temperature changes. Output zero drift will affect the measurement accuracy of the pressure system, so it is often necessary to zero the transmitter on-site.

[0004] Currently, the nuclear-grade pressure transmitter head housing disclosed in Chinese patent CN202122238430.5 and the pressure transmitter disclosed in Chinese patent CN202210027233.5 both use mechanical knob-type zeroing, which is easy to operate and highly reliable in the nuclear power industry. However, the sealing ring in the zeroing knob is at risk of aging and rotational tearing after equipment maintenance and zeroing to a certain number of turns, and needs to be replaced. However, the current structure makes it difficult to operate when replacing the sealing ring. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a sealing ring installation structure for solving the technical problem of difficulty in replacing the sealing ring of the zero adjustment knob in the prior art.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a sealing ring installation structure, comprising:

[0007] A housing, wherein a zeroing installation hole is provided on the housing, wherein the zeroing installation hole comprises an outer hole and at least one inner hole connected to each other, all the inner holes are connected to the outer hole, and an annular blocking surface is provided in the middle of the inner hole;

[0008] A zeroing plug, wherein the middle part of the zeroing plug is also provided with an annular thrust surface, the zeroing plug is inserted into the corresponding inner hole from the outer hole, the annular blocking surface cooperates with the annular thrust surface, the annular blocking surface limits the zeroing plug, and an annular mounting groove is also provided on the zeroing plug;

[0009] A sealing ring, the sealing ring being arranged in the annular mounting groove;

[0010] An elastic limiting member, wherein the elastic limiting member is clamped on the inner wall of the outer hole, and the elastic limiting member is used to limit the zero adjustment insert.

[0011] The advantage of adopting the above technical solution is that the zero adjustment plug is first limited by the annular blocking surface, and then the other end of the zero adjustment plug is limited by the elastic limiter to ensure that the zero adjustment plug will not be displaced. At the same time, when the sealing ring needs to be replaced, it is only necessary to release the limit of the zero adjustment plug by the elastic limiter, so that the zero adjustment plug can be taken out and the sealing ring can be quickly replaced.

[0012] Optionally, a retaining groove is further provided on the hole wall of the outer hole, and the elastic limiting member is a retaining ring with a U-shaped structure, and the elastic limiting member is retained in the retaining groove.

[0013] Optionally, the ends of the two straight segments of the elastic limiting member are bent inward to form a disassembly portion.

[0014] Optionally, a cover plate is further provided on the outside of the shell, and the cover plate is fixed at the opening of the zero adjustment mounting hole.

[0015] Optionally, an operating groove is further provided on the end surface of the zero adjustment plug facing the outer side of the shell.

[0016] Optionally, a docking groove is further provided on the end surface of the zero adjustment core facing the inner side of the shell.

[0017] Optionally, the notch of the docking groove is also provided with a guiding slope.

[0018] Optionally, a mounting seat is further provided on the outer wall of the shell, the mounting seat is integrally formed with the shell, the zero adjustment mounting hole is located on the mounting seat, a plurality of screw holes are further provided on the mounting seat, and the cover plate is fixed to the corresponding screw holes by a plurality of bolts.

[0019] As described above, a sealing ring installation structure of the utility model has the following beneficial effects: first, the annular blocking surface is used to limit the zero adjustment plug, and then the elastic limiting member is used to limit the other end of the zero adjustment plug, to ensure that the zero adjustment plug will not be displaced and the sealing effect is ensured. When the sealing ring needs to be replaced, it is only necessary to release the limit of the zero adjustment plug by the elastic limiting member, so that the zero adjustment plug can be taken out and the sealing ring can be quickly replaced. The structure is highly compact and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Shown is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0021] Figure 2 Display as Figure 1 A local enlarged view of the X in the figure;

[0022] Figure 3 Shown is a schematic diagram of the structure of a zero-adjusting insert in one embodiment of the utility model;

[0023] Figure 4 Shown is a schematic cross-sectional structure diagram of a housing in one embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram showing the structure of an elastic limiting member in one embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure in one embodiment of the utility model.

[0026] Part Number Description

[0027] 1 Housing

[0028] 101 Annular arresting surface

[0029] 2 Zero adjustment insert

[0030] 201 Annular thrust surface

[0031] 3 Sealing ring

[0032] 4 Elastic limiter

[0033] 401 Disassembly Department

[0034] 5 Cover

[0035] 6 Connectors

[0036] 7 Sensors DETAILED DESCRIPTION

[0037] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0038] See also Figures 1 to 6. It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner. The illustrations only show the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0039] See also Figures 1 to 6 As shown, the utility model provides a sealing ring installation structure, comprising:

[0040] Exemplarily, a housing 1 is provided with a zeroing mounting hole on the housing 1, the zeroing mounting hole comprises an outer hole and at least one inner hole connected to each other, all the inner holes are connected to the outer hole, and an annular blocking surface 101 is provided in the middle of the inner hole;

[0041] The zeroing plug 2 is provided with an annular thrust surface 201 in the middle part of the zeroing plug 2. The zeroing plug 2 is inserted into the corresponding inner hole from the outer hole. The annular blocking surface 101 cooperates with the annular thrust surface 201. The annular blocking surface 101 limits the zeroing plug 2. The zeroing plug 2 is also provided with an annular mounting groove.

[0042] A sealing ring 3, wherein the sealing ring 3 is arranged in the annular mounting groove;

[0043] An elastic limiting member 4 is clamped on the inner wall of the outer hole, and is used to limit the zero adjustment insert 2 .

[0044] In one embodiment, a PCB assembly is further provided in the shell 1, a connector 6 is connected to one side of the shell 1, and a sensor 7 is further connected to the other side of the shell 1. The sensor 7 is disposed in a container, and the container is detachably connected to the shell 1.

[0045] It should also be noted that when in use, the sealing ring 3 is sleeved on the corresponding zero adjustment plug 2 and inserted into the corresponding inner hole, so that the sealing ring 3 is tightly pressed against the outer wall of the corresponding inner hole to ensure the sealing. At the same time, the two ends of the zero adjustment plug 2 are limited to prevent the zero adjustment plug 2 from axial movement. The limit at one end is limited by an elastic limit member 4, so that when installing and releasing, it is only necessary to use the deformation of the elastic limit member 4 to release the limit on the zero adjustment plug 2, and the zero adjustment plug 2 is pulled out to replace the sealing ring 3, which is convenient and fast, and the operation is smooth.

[0046] Exemplarily, a hole wall of the outer hole is further provided with a retaining groove, and the elastic limiting member 4 is a retaining ring with a U-shaped structure, and the elastic limiting member 4 is retained in the retaining groove.

[0047] It should also be noted that a positioning groove is provided on the hole wall of the outer hole to limit the elastic limiting member 4 , and at the same time, the inner edge of the elastic limiting member 4 blocks the zero adjustment plug 2 .

[0048] Exemplarily, the ends of the two straight segments of the elastic limiting member 4 are bent inward to form a disassembly portion 401 .

[0049] It should also be noted that a disassembly portion 401 is provided at the end of the straight segment of the elastic limit member 4, so that when the elastic limit member 4 needs to be forced to deform, the two ends of the elastic limit member 4 can be brought close to each other through the disassembly portion 401, thereby causing the elastic limit member 4 to fall off from the corresponding locking groove.

[0050] Exemplarily, a cover plate 5 is further provided on the outside of the housing 1 , and the cover plate 5 is fixed at the opening of the zero adjustment mounting hole.

[0051] It should also be noted that the cover plate 5 can further protect the elastic limiter 4, which plays a role in beautifying and protecting the zero adjustment plug 2. The zero adjustment installation cover plate determines whether to set a rubber ring or a metal sealing ring on the cover plate 5 according to the user's usage environment to provide waterproof protection for the interior of the shell 1.

[0052] Exemplarily, an operation groove is further provided on the end surface of the zero adjustment insert 2 facing the outer side of the housing 1 .

[0053] It should also be noted that the operating groove is a straight groove or a cross groove, which is convenient for tools to operate the zero adjustment insert 2.

[0054] Exemplarily, the end surface of the zero adjustment core 2 facing the inner side of the housing 1 is further provided with a docking groove.

[0055] It should also be noted that the purpose of providing the docking groove is to cooperate with the sliding resistor adjuster knob on the PCB board inside the housing 1 through the docking groove.

[0056] Exemplarily, the notch of the docking groove is also provided with a guiding slope.

[0057] It should also be noted that during docking, the guiding slope of the docking groove can be used for guidance to improve the success rate of docking.

[0058] Exemplarily, a mounting seat is further provided on the outer wall of the shell 1, and the mounting seat is integrally formed with the shell 1. The zero adjustment mounting hole is located on the mounting seat, and the mounting seat is further provided with a plurality of screw holes. The cover plate 5 is fixed to the corresponding screw holes by a plurality of bolts.

[0059] It should also be noted that the mounting seat is provided to increase the wall thickness of the housing 1, to provide space for the arrangement of the zero adjustment mounting hole, and at the same time to ensure the axial length of the sealing structure to improve the sealing performance.

[0060] In summary, a sealing ring installation structure of the present invention is adopted. First, the zero adjustment plug 2 is limited by the annular blocking surface 101, and then the other end of the zero adjustment plug 2 is limited by the elastic limiting member 4, so as to ensure that the zero adjustment plug 2 will not be displaced and the sealing effect is ensured. When the sealing ring 3 needs to be replaced, the deformation of the elastic limiting member 4 is utilized. It is only necessary to release the limit of the zero adjustment plug 2 by the elastic limiting member 4, so that the zero adjustment plug 2 can be taken out and the sealing ring 3 can be quickly replaced. The structure is highly compact and the operation is convenient.

[0061] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A sealing ring installation structure, characterized in that: include: A housing (1), wherein a zero adjustment mounting hole is provided on the housing (1), the zero adjustment mounting hole comprises an outer hole and at least one inner hole which are connected to each other, all the inner holes are connected to the outer hole, and an annular blocking surface (101) is provided in the middle of the inner hole; A zeroing plug (2), wherein an annular thrust surface (201) is also provided in the middle of the zeroing plug (2), the zeroing plug (2) is inserted from the outer hole into the corresponding inner hole, the annular blocking surface (101) and the annular thrust surface (201) cooperate with each other, the annular blocking surface (101) limits the position of the zeroing plug (2), and an annular mounting groove is also provided on the zeroing plug (2); A sealing ring (3), wherein the sealing ring (3) is arranged in the annular mounting groove; An elastic limiting member (4), the elastic limiting member (4) being clamped on the inner wall of the outer hole, and the elastic limiting member (4) being used to limit the zero adjustment insert (2).

2. A sealing ring installation structure according to claim 1, characterized in that: The hole wall of the outer hole is also provided with a locking groove, the elastic limiting member (4) is a clamping ring with a U-shaped structure, and the elastic limiting member (4) is clamped in the locking groove.

3. A sealing ring installation structure according to claim 2, characterized in that: The ends of the two straight segments of the elastic limiting member are bent inwards to form a disassembly portion (401).

4. A sealing ring installation structure according to claim 3, characterized in that: A cover plate (5) is also provided on the outside of the housing (1), and the cover plate (5) is fixed at the opening of the zero adjustment installation hole.

5. A sealing ring installation structure according to claim 4, characterized in that: An operating groove is also provided on the end surface of the zero adjustment plug core (2) facing the outside of the housing (1).

6. A sealing ring installation structure according to claim 5, characterized in that: The end surface of the zero adjustment plug core (2) facing the inner side of the housing (1) is also provided with a docking groove.

7. A sealing ring installation structure according to claim 6, characterized in that: The notch of the docking groove is also provided with a guiding inclined surface.

8. A sealing ring installation structure according to claim 7, characterized in that: A mounting seat is also provided on the outer wall of the shell (1), the mounting seat and the shell (1) are integrally formed, the zero adjustment mounting hole is located on the mounting seat, a plurality of screw holes are also provided on the mounting seat, and the cover plate (5) is fixed to the corresponding screw holes by means of a plurality of bolts.

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