Sealing structure of liquid level sensor cable

Abstract

The utility model provides a sealing structure of a liquid level sensor cable. The sealing structure comprises a shell and a cable which is partially wrapped by the shell in the circumferential direction. The cable outlet head is sleeved on the cable and is in butt joint with the shell; the adhesive layer is arranged between the cable outlet head and the cable; the stress ring is connected to the cable in a sleeving manner and is partially wrapped by the adhesive layer; the compression nut is connected to the cable in a sleeving mode and abuts against the side, away from the shell, of the stress ring; and the protective cover is sleeved on the cable and is in butt joint with the cable outlet head, and the compression nut is wrapped by the protective cover. The sealing performance problem of the sensor in deep liquid level detection can be effectively solved.

Description

Technical Field

[0001] The utility model relates to the application field of sensor components, in particular to a sealing structure of a liquid level sensor cable. Background Art

[0002] A liquid level sensor (submersible level sensor) is a sensor that measures the depth of liquid. The sensor can be directly immersed in the liquid being measured. When the liquid level changes, the sensor converts the sensed pressure data into a depth value, providing a more intuitive and clear understanding of the changes in the measured liquid level. Currently, non-submersible methods are commonly used to measure liquid level depth. These sensors are typically placed on the outer wall of the liquid container, increasing installation space and personnel safety risks. Other submersible level sensors that are immersed in the liquid have problems such as small measurement depth, poor cable sealing, and cable loosening over time. Utility Model Content

[0003] In view of the above problems existing in the prior art, the present invention proposes a sealing structure for a liquid level sensor cable, which mainly solves the problem that the cable of the submersible liquid level sensor has poor sealing and is easy to loosen.

[0004] In order to achieve the above-mentioned purpose and other purposes, the technical solution adopted by the present utility model is as follows.

[0005] The present application provides a sealing structure for a liquid level sensor cable, comprising:

[0006] a housing and a cable partially wrapped by the housing in a circumferential direction;

[0007] A cable outlet, which is sleeved on the cable and docked with the housing;

[0008] an adhesive layer disposed between the cable outlet and the cable;

[0009] a stress-bearing ring, which is sleeved on the cable and partially wrapped by the adhesive layer;

[0010] a compression nut, which is sleeved on the cable and abuts against a side of the stress ring away from the housing;

[0011] A protective cover is sleeved on the cable and docked with the cable outlet, and the compression nut is wrapped by the protective cover.

[0012] In one embodiment of the present application, the inner diameter of the cable outlet gradually decreases in a direction away from the housing.

[0013] In one embodiment of the present application, a threaded structure is provided on the inner wall of the protective cover.

[0014] In one embodiment of the present application, a thread hole is provided on the clamping nut, and the thread hole passes through the clamping nut.

[0015] In one embodiment of the present application, a diameter of the side of the cable hole close to the housing is larger than a diameter of the side away from the housing.

[0016] In one embodiment of the present application, the adhesive layer is made of epoxy resin potting glue.

[0017] In one embodiment of the present application, the diameter of the clamping nut on the side away from the stress ring is larger than the diameter on the side close to the stress ring, so that a gap is left between the clamping nut and the protective cover, and the gap is filled with the same material as the cable outlet to obtain a filling layer; the protective cover is fixed in cooperation with the filling layer.

[0018] In one embodiment of the present application, a cavity is provided on the axis of the cable outlet head, and the cable passes through the cavity to form an accommodating space between the cable outlet head and the cable.

[0019] In one embodiment of the present application, a diameter of the cavity on a side close to the shell is smaller than a diameter of the cavity on a side away from the shell.

[0020] As described above, the sealing structure of a liquid level sensor cable of the present invention has the following beneficial effects.

[0021] This application uses an adhesive layer to tightly bond the cable's outer rubber, which can effectively ensure the sealing of deep liquid level detection; through the cooperation of the force ring and the clamping nut, it can effectively prevent the cable from loosening or falling off during the pulling process, thereby enhancing the durability and reliability of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the sealing structure of the liquid level sensor cable in one embodiment of the present application.

[0023] Description of Figure Numbers:

[0024] 1-housing; 2-adhesive layer; 3-stress ring; 4-compression nut; 5-cable; 6-protective cover; 7-cable outlet. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features within these embodiments may be combined with one another, unless they conflict.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. Therefore, the drawings only show components related to the present invention and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0027] See also Figure 1 , Figure 1 This is a schematic diagram of the sealing structure of the liquid level sensor cable in an embodiment of the present application. The sealing structure of the embodiment of the present application includes: a housing 1 and a cable 5 partially wrapped by the housing 1 in the circumferential direction; a cable outlet 7, which is sleeved on the cable 5 and docked with the housing 1; an adhesive layer 2, which is arranged between the cable outlet 7 and the cable 5; a stress ring 3, which is sleeved on the cable 5 and partially wrapped by the adhesive layer 2; a compression nut 4, which is sleeved on the cable 5 and abuts against the side of the stress ring 3 away from the housing 1; a protective cover, which is sleeved on the cable 5 and docked with the cable outlet 7, and the compression nut 4 is wrapped by the protective cover. Specifically, the liquid level sensor can be placed in the housing 1, and the cable 5 is electrically connected to the liquid level sensor inside the housing 1. An opening is provided on the housing 1, and the cable 5 passes through the opening to extend out of the housing 1.

[0028] In one embodiment, a stress ring 3 can be put on the extended cable 5, and the stress ring 3 is arranged close to the shell 1. The specific distance between the stress ring 3 and the shell 1 can be adjusted according to actual application requirements, which is not limited here.

[0029] In one embodiment, after the stress ring 3 is attached, adhesive layers 2 can be applied on both sides of the stress ring 3. Specifically, adhesive layers 2 can be applied on the side of the stress ring 3 closest to the housing 1 and on the side further away from the housing 1. The adhesive layers 2 are fully bonded to the outer rubber of the cable 5 to prevent the cable 5 from loosening and falling off when subsequently pulled. The adhesive layers 2 can be cured and hardened to increase strength.

[0030] In one embodiment, the adhesive layer 2 may be made of epoxy resin potting glue. The adhesive layers 2 on both sides may fix the position of the stress ring 3 , and the cable 5 may be tightly bonded by utilizing the sealing and structural adhesive properties of the epoxy resin potting glue.

[0031] In one embodiment, the thickness of the adhesive layer 2 provided on the side of the stress ring 3 away from the housing 1 is smaller than the width of the ring surface of the stress ring 3 , so that the stress ring 3 is partially exposed from the adhesive layer 2 .

[0032] In one embodiment, a cable outlet connector 7 is installed on one side of the housing 1 where the opening is provided. The cable outlet connector 7 is sleeved onto the extended cable 5 and tightly fits the corresponding position of the housing 1. The cable outlet connector 7 wraps around the side of the stress ring 3 and the adhesive layer 2 between the stress ring 3 and the housing 1, and tightly fits the adhesive layer 2. A cavity is provided at the axis of the cable outlet connector 7, through which the cable 5 passes, forming a storage space between the cable outlet connector 7 and the cable 5, which can be used to accommodate the adhesive layer 2 and the stress ring 3.

[0033] In another embodiment, the cable outlet connector 7 can be installed first, and glue can be poured onto the cable outlet connector 7. After the first pouring, the stress ring 3 is then placed, and a second pouring is performed on the stress ring 3 to form the adhesive layer 2. Due to the cavity within the cable outlet connector 7, there is a gap between the cable outlet connector 7 and the cable 5. Glue can be poured into this gap, and after curing, an adhesive layer 2 is formed that is flush with the surface of the cable outlet connector 7 facing away from the housing 1. Of course, the thickness of the glue can be set and adjusted according to actual application requirements, which is not limited here. After the first pouring, the stress ring 3 is placed over the cable 5. The diameter of the stress ring 3 can be slightly smaller than the diameter of the cavity within the cable outlet connector 7, or it can be exactly equal to the diameter of the cavity. The specific diameter can be set and adjusted according to requirements and is not limited here. The stress ring 3 is structurally supported by the adhesive layer 2 formed by the first pouring. A second pouring is performed on the stress ring 3 to form the remaining adhesive layer 2.

[0034] In one embodiment, the diameter of the cavity on the side closest to the housing 1 is smaller than the diameter on the side farther from the housing 1. Specifically, the diameter of the cavity near the housing 1 can gradually decrease as it approaches the housing 1, forming a funnel-shaped cavity. Alternatively, a structure with a straight top and a funnel bottom can be employed. The specific cavity shape can be configured and adjusted based on actual application requirements and is not limited here.

[0035] In one embodiment, the inner diameter of the cable outlet head 7 gradually decreases in the direction away from the housing 1, so that the exposed part of the cable outlet head 7 is an arc surface. The specific inner diameter gradient can be adjusted according to actual application requirements and is not limited here.

[0036] In one embodiment, after the adhesive layer 2 is set, a clamping nut 4 can be sleeved on the cable 5. The clamping nut 4 rests on the force ring 3. The abutment structure between the force ring 3 and the clamping nut 4 can prevent the cable 5 from loosening or falling off when the cable 5 is pulled.

[0037] In one embodiment, a wire hole is provided on the compression nut 4, and the wire hole passes through the compression nut 4. The cable 5 can pass through the wire hole, so that one end of the compression nut 4 abuts against the stress ring 3.

[0038] In one embodiment, the diameter of the cable hole of the compression nut 4 on the side close to the housing 1 is larger than the diameter on the side away from the housing 1. Therefore, when the compression nut 4 is sleeved on the cable 5, a gap is formed between the side close to the housing 1 and the cable 5, and this gap can be used to accommodate the adhesive layer 2.

[0039] In one embodiment, a protective cover can be sleeved on the outside of the clamping nut 4, and the clamping nut 4 is wrapped by the protective cover so that the side of the clamping nut 4 away from the shell 1 is against the protective cover. The protective cover, the clamping nut 4 and the force ring 3 cooperate to limit the position of the cable 5 to prevent the cable 5 from loosening or falling off when it is pulled.

[0040] In one embodiment, the diameter of the compression nut 4 on the side away from the stress ring 3 is larger than the diameter on the side closer to the stress ring 3, leaving a gap between the compression nut 4 and the protective cover. This gap is filled with the same material as the cable outlet 7 to form a filling layer; the protective cover cooperates with the filling layer to secure it. It should be noted that the diameter here refers to the outer diameter of the compression nut 4, that is, the distance from the outer surface to the axis. Based on the above description, the compression nut 4 has an outwardly protruding nut structure on the side away from the stress ring 3. The gap formed below the nut structure is provided with a filling layer. This filling layer can be an integrally formed structure with the cable outlet 7. The filling layer is an annular structure with a boss at the outer side of the annular structure where it docks with the cable outlet 7. After installation, the protective cover cooperates with the boss to form a sealing structure. In another embodiment, the filling layer can also be a separate structural layer, fixedly connected to the side of the cable outlet 7 facing away from the housing 1. The material of the filling layer can also be set and adjusted according to actual application requirements and is not limited here.

[0041] In one embodiment, a threaded structure is provided on the inner wall of the protective cover, and the threaded structure can engage with the filling layer to enhance the structural stability and sealing performance.

[0042] Based on the technical solutions of the above embodiments of the present application, the stress ring 3 passes through the cable 5 and is firmly pressed at the appropriate position. The stress ring 3 can effectively solve the problem that the cable 5 moves up and down during the pulling process, thereby causing the cable 5 to loosen or fall off due to the shrinkage of the surface insulating rubber. The cable 5 equipped with the stress ring 3 is installed into the cable outlet; then the epoxy resin potting glue is used for potting, and the unique sealing and structural adhesive properties of the epoxy resin potting glue tightly bond the cable 5; finally, the tightening nut 4 is screwed into the cable outlet, and the cable 5 is gently pulled upward to fit the stress ring 3 and the tightening nut 4; the sealing structure based on the embodiment of the present application can achieve a good sealing effect of the immersive liquid level sensor at a deep liquid level; the epoxy resin potting glue in the sealing structure itself has excellent mechanical properties, and the epoxy resin potting glue is fully bonded to the outer rubber of the cable 5, which can effectively solve the sealing problem of deep liquid level; at the same time, the sealing structure can be used for gauge pressure, absolute pressure and other types of sensors, realizing the universality of the sealing structure; the sealing structure solves the sealing problem under liquid pressure of about 300 meters well, and realizes real-time monitoring of the measured liquid level by the sensor; the overall sealing structure is low in cost and can reap good economic benefits.

[0043] 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 skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A sealing structure for a liquid level sensor cable, characterized in that: include: a housing and a cable partially wrapped by the housing in a circumferential direction; A cable outlet, which is sleeved on the cable and docked with the housing; an adhesive layer disposed between the cable outlet and the cable; a stress-bearing ring, which is sleeved on the cable and partially wrapped by the adhesive layer; a compression nut, which is sleeved on the cable and abuts against a side of the stress ring away from the housing; A protective cover is sleeved on the cable and docked with the cable outlet, and the compression nut is wrapped by the protective cover.

2. The sealing structure of the liquid level sensor cable according to claim 1, characterized in that: The inner diameter of the cable outlet gradually decreases in a direction away from the housing.

3. The sealing structure of the liquid level sensor cable according to claim 1, characterized in that: The inner wall of the protective cover is provided with a thread structure.

4. The sealing structure of the liquid level sensor cable according to claim 1, characterized in that: The compression nut is provided with a thread hole, and the thread hole passes through the compression nut.

5. The sealing structure of the liquid level sensor cable according to claim 4, characterized in that: The diameter of the side of the cable hole close to the shell is larger than the diameter of the side away from the shell.

6. The sealing structure of the liquid level sensor cable according to claim 1, characterized in that: The adhesive layer is made of epoxy resin potting glue.

7. The sealing structure of the liquid level sensor cable according to claim 4, characterized in that: The diameter of the clamping nut on the side away from the stress ring is larger than the diameter on the side close to the stress ring, so that a gap is left between the clamping nut and the protective cover. The gap is filled with the same material as the cable outlet to obtain a filling layer; the protective cover is fixed in cooperation with the filling layer.

8. The sealing structure of the liquid level sensor cable according to claim 1, characterized in that: The cable outlet head is provided with a cavity at the axis thereof, and the cable passes through the cavity to form an accommodating space between the cable outlet head and the cable.

9. The sealing structure of the liquid level sensor cable according to claim 8, characterized in that: The diameter of the cavity at a side close to the housing is smaller than the diameter of the cavity at a side away from the housing.

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