A watertight connecting device with thermal expansion and contraction compensation function
By incorporating a temperature compensation structure and sealing gasket in the watertight connection device and adjusting the piston position using the principle of thermal expansion and contraction, the problem of poor sealing performance in existing devices is solved, achieving stability and adaptability of cable connections in marine environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN SEAMASTER CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-06-16
AI Technical Summary
Existing watertight connection devices cannot automatically compensate for changes in ambient temperature, resulting in poor sealing and easy damage to the circuit.
A watertight connection device with thermal expansion and contraction compensation function was designed. By setting a temperature compensation structure between the first and second mounting seats, including a piston and air in the mounting cavity, the piston position is adjusted by the principle of thermal expansion and contraction. Combined with the sealing gasket and bolt connection, automatic sealing adjustment is achieved.
It effectively prevents seawater from entering the device, protects the circuit from damage, improves the watertightness and sealing performance of the device, and adapts to changes in marine environmental temperature.
Smart Images
Figure CN224366226U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of marine optical cable connection technology, and in particular to a watertight connection device with thermal expansion and contraction compensation function. Background Technology
[0002] In the field of marine technology, with the continuous deepening of marine resource development and utilization, various marine observation equipment, underwater communication systems, and marine energy harvesting and transmission devices have placed extremely stringent requirements on the stability, sealing, and adaptability of internal cable connections. The marine environment is extremely complex, and temperature has a significant impact on cable connections. Seawater temperature varies considerably with seasons, day and night, and different sea depths. Taking the deep sea as an example, the temperature difference between surface seawater and seawater thousands of meters below can reach more than 20°C.
[0003] Existing watertight connection devices cannot automatically compensate for changes in ambient temperature when facing complex marine conditions. This can easily lead to problems such as expansion of internal sealing components when the ambient temperature rises, causing damage to the components, and contraction of internal sealing components when the ambient temperature drops, resulting in a poor seal and allowing seawater to enter the device and damage the circuitry. Utility Model Content
[0004] To address the technical problem that existing watertight connection devices cannot automatically compensate for changes in ambient temperature during cable connection, which can easily lead to damage to internal components and poor watertightness, this utility model provides a watertight connection device with thermal expansion and contraction compensation function.
[0005] The watertight connection device with thermal expansion and contraction compensation function provided by this utility model adopts the following technical solution:
[0006] A watertight connection device with thermal expansion and contraction compensation function includes a first mounting base and a second mounting base. Both the first and second mounting bases are T-shaped hollow columnar structures, thicker at one end and thinner at the other. A first connecting line is disposed inside the first mounting base, with a first connector at one end. A second connecting line is disposed inside the second mounting base, with a second connector at one end. The first and second connectors are plugged into each other. The first mounting base is provided with a temperature compensation structure that automatically adjusts according to changes in ambient temperature. The temperature compensation structure includes a piston disposed inside a mounting cavity at the end of the first mounting base. Air exists between the piston and the bottom of the mounting cavity, driving the piston's movement through thermal expansion and contraction. The first and second mounting bases are fixedly connected by connecting the piston to a connecting component at the end of the second mounting base.
[0007] By adopting the above technical solution, the watertight connection device, by setting a temperature compensation structure, can automatically adjust the piston position in the temperature compensation structure according to changes in the ambient temperature, preventing changes in the ambient temperature from affecting the sealing performance of the watertight connection device.
[0008] Furthermore, a protrusion is provided at the bottom of the mounting cavity, which creates a gap for storing air between the piston and the bottom of the mounting cavity, thereby creating a partial air gap between the piston and the bottom of the mounting cavity. The connecting component includes a mounting bolt, which passes through a mounting hole at the end of the second mounting seat and forms a threaded connection with a connecting hole at the end of the piston.
[0009] By adopting the above technical solution, an air gap is created between the piston and the bottom of the mounting cavity, allowing the piston to move within the mounting cavity due to the thermal expansion and contraction of the air.
[0010] Furthermore, the first connector is disposed inside the mounting groove provided at the end of the first mounting base, forming an annular groove between the outer wall of the first connector and the inner wall of the mounting groove, and the end of the second mounting base has an annular protrusion, which is inserted into the annular groove.
[0011] By adopting the above technical solution, the annular protrusion at the end of the second mounting seat is inserted into the annular groove in the first mounting seat, thereby connecting the first mounting seat and the second mounting seat and increasing the sealing between the first mounting seat and the second mounting seat.
[0012] Furthermore, a first sealing gasket is provided inside the annular groove, and an annular protrusion at the end of the second mounting seat presses against the first sealing gasket. A second sealing gasket is provided at the connection position between the first mounting seat and the second mounting seat.
[0013] By adopting the above technical solution, by setting a first sealing gasket and a second sealing gasket, the watertight connection device has a double-layer sealing structure, which increases the sealing performance of the watertight connection device.
[0014] Furthermore, both the first mounting base and the second mounting base are provided with external threads, and nuts are threaded onto the external threads of both. By rotating the nuts, the first mounting base is fixed to the first connecting line, and the second mounting base is fixed to the second connecting line.
[0015] By adopting the above technical solution, the first mounting base and the first connecting line, and the second mounting base and the second connecting line can be fixed by rotating the nut, which facilitates the installation of this sealing connection device.
[0016] Furthermore, cable protection heads are provided at the outer ends of both the first and second mounting bases, and the cable protection heads are flexible structures with uniformly distributed expansion grooves on their outer surfaces.
[0017] By adopting the above technical solution, the connection points between the first connecting line and the first mounting base, and between the second connecting line and the second mounting base are protected by the cable protection head.
[0018] Furthermore, temperature-conducting grooves are alternately arranged on the outer and inner arc surfaces near the mounting cavity at the end of the first mounting base.
[0019] By adopting the above technical solution, the air inside the installation cavity can quickly sense changes in the ambient temperature by setting up a temperature conduction groove.
[0020] In summary, the beneficial effects of this utility model are as follows:
[0021] 1. This utility model achieves a second sealing gasket by interlocking the annular groove formed between the first connector and the first mounting base with the annular protrusion at the end of the second mounting base, and by setting a second sealing gasket between the first and second mounting bases. During circuit connection, the second sealing gasket is deformed by the mutual compression of the first and second mounting bases, thus sealing the device and preventing seawater from entering the device. The first sealing gasket is placed inside the annular groove and squeezed and cooperates with the annular protrusion at the end of the second mounting base to achieve a second sealing effect, thereby improving the water tightness of the device itself.
[0022] 2. This utility model provides a mounting cavity on a first mounting base, with a piston inside the mounting cavity. The piston has a connecting hole, and a mounting hole is provided at the end of a second mounting base. When the device is connected, a mounting bolt passes through the mounting hole and is threaded into the connecting hole in the piston, thereby fixing the first and second mounting bases together. A watertight connection of the circuit is achieved through a first and a second sealing gasket. During use, the device's own temperature will rise or fall due to changes in the ambient temperature. The expansion or contraction of the air inside the mounting cavity causes the piston to move, thereby adjusting the mutual pressure between the first and second mounting bases during connection. This achieves automatic compensation of the device, preventing damage to the first and second sealing gaskets due to excessive pressure. Simultaneously, it prevents the first and second sealing gaskets from contracting due to a drop in the device's own temperature, which could lead to poor sealing and allow seawater to enter the device and damage the circuit. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0024] Figure 2 This utility model Figure 1 A schematic cross-sectional view;
[0025] Figure 3 This is a schematic plan view of the first mounting base of this utility model;
[0026] Figure 4 This utility model Figure 3 A schematic diagram of the cross-section in the diagram;
[0027] Figure 5 This is an exploded view of the overall structure of this utility model.
[0028] As shown in the figure: 1. First mounting base; 2. First connecting wire; 3. Second mounting base; 4. Second connecting wire; 5. Piston; 6. Mounting bolt; 7. External thread; 8. Nut; 9. First sealing gasket; 10. Second sealing gasket; 11. Cable protection head; 101. Mounting cavity; 102. Annular groove; 103. Temperature guiding groove; 201. First connector; 301. Mounting hole; 302. Annular protrusion; 401. Second connector; 501. Connecting hole. Detailed Implementation
[0029] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.
[0030] Example: Figures 1-5 The diagram shows a watertight connection device with thermal expansion and contraction compensation function.
[0031] The first embodiment of this utility model, referred to... Figure 1 , Figure 2 and Figure 5 As shown, a watertight connection device with thermal expansion and contraction compensation function includes a first mounting base 1 and a second mounting base 3. Both the first mounting base 1 and the second mounting base 3 are T-shaped hollow columnar structures, thicker at one end and thinner at the other. A first connecting line 2 is disposed inside the first mounting base 1, and a first connector 201 is disposed at the end of the first connecting line 2. A second connecting line 4 is disposed inside the second mounting base 3, and a second connector 401 is disposed at the end of the second connecting line 4. The first connector 201 and the second connector 401 are plugged into each other, and the circuit is connected through the mating of the first connector 201 and the second connector 401. Cable protection heads 11 are provided at the outer ends of both the first mounting base 1 and the second mounting base 3. The cable protection heads 11 are flexible structures with uniformly distributed expansion grooves on their outer surface. The cable protection heads 11 can bend with the bending of the first connecting line 2 and the second connecting line 4, thereby protecting the connection points between the first connecting line 2 and the first mounting base 1, and between the second connecting line 4 and the second mounting base 3. Preferably, as... Figure 2 , Figure 5As shown, the first connector 201 is disposed inside the mounting groove at the end of the first mounting base 1. An annular groove 102 is formed between the outer wall of the first connector 201 and the inner wall of the mounting groove. The end of the second mounting base 3 has an annular protrusion 302, which is inserted into the annular groove 102 to achieve seawater isolation. Preferably, a first sealing gasket 9 is disposed inside the annular groove 102, and the annular protrusion 302 at the end of the second mounting base 3 presses against the first sealing gasket 9. A second sealing gasket 10 is disposed at the connection position outside the first mounting base 1 and the second mounting base 3. The first sealing gasket 9 and the second sealing gasket 10 can improve the sealing performance of the device after the first mounting base 1 and the second mounting base 3 are connected by their own deformation, which can effectively protect the internal components of the device from seawater corrosion. External threads 7 are disposed on the outside of the first mounting base 1 and the second mounting base 3, and nuts 8 are connected to the external threads of the external threads 7. The first mounting base 1 and the first connecting line 2 and the second mounting base 3 and the second connecting line 4 are fixed by rotating the nuts 8.
[0032] When connecting the cable, the first mounting base 1 and the second mounting base 3 are connected to insert the first connector 201 and the second connector 401, thereby connecting the circuit. The nut 8 is rotated to fix the installation positions of the first mounting base 1 and the second mounting base 3 respectively. In use, the second sealing gasket 10 is deformed by the mutual compression of the first mounting base 1 and the second mounting base 3 to seal the device, thereby preventing seawater from entering the device. The first sealing gasket 9 is inside the annular groove 102 and cooperates with the annular protrusion 302 at the end of the second mounting base 3 to achieve a second sealing effect of the device.
[0033] The second embodiment of this utility model is described below. Figure 2 and Figure 5 As shown, the first mounting base 1 is provided with a temperature compensation structure that can automatically adjust according to changes in ambient temperature. The temperature compensation structure includes a piston 5, which is disposed inside a mounting cavity 101 at the end of the first mounting base 1. A protrusion is provided at the bottom of the mounting cavity 101, which creates a gap between the piston 5 and the bottom of the mounting cavity 101, thus creating a partial air gap between the piston 5 and the bottom of the mounting cavity 101. The first mounting base 1 and the second mounting base 3 are connected and fixed by connecting the piston 5 to a connecting component at the end of the second mounting base 3. Preferably, the connecting component includes a mounting bolt 6, which has a connecting hole 501 at the end of the piston 5. The mounting bolt 6 passes through the mounting hole 301 at the end of the second mounting base 3 and forms a threaded connection with the connecting hole 501 at the end of the piston 5.
[0034] During cable connection, the first mounting base 1 is fixed to the first connecting wire 2 and the second mounting base 3 is fixed to the second connecting wire 4 by rotating the nut 8. Then, the first mounting base 1 and the second mounting base 3 are mated together, and the first connector 201 and the second connector 401 are inserted. The mounting bolt 6 is threaded through the mounting hole 301 and into the connecting hole 501 in the piston 5, thereby connecting and fixing the first mounting base 1 and the second mounting base 3. The sealing connection of the circuit is achieved through the first sealing gasket 9 and the second sealing gasket 10 between the first mounting base 1 and the second mounting base 3. During device use, the device's own temperature will rise or fall due to changes in the ambient temperature. When the device's own temperature rises, due to the principle of thermal expansion and contraction, the mounting cavity 10... The air inside the mounting cavity 101 expands, pushing the piston 5 and mounting bolt 6 outwards. This reduces the mutual pressure at the connection between the first mounting base 1 and the second mounting base 3, thus achieving automatic thermal compensation and preventing damage to the first sealing gasket 9 and the second sealing gasket 10 due to excessive pressure on the device itself. When the device temperature decreases, the air inside the mounting cavity 101 contracts. At this time, the piston 5 and mounting bolt 6 move towards the mounting cavity 101, thereby increasing the mutual pressure at the connection between the first mounting base 1 and the second mounting base 3. This achieves automatic cold compensation and prevents the first sealing gasket 9 and the second sealing gasket 10 from contracting due to the device temperature, which could lead to poor sealing and allow seawater to enter the device and damage the circuit.
[0035] like Figure 4 and Figure 5 As shown, temperature guiding grooves 103 are alternately arranged on the outer arc surface and the inner arc surface at the end of the first mounting base 1, and the temperature guiding grooves 103 are all located near the mounting cavity 101.
[0036] When the ambient temperature changes, the temperature-conducting groove 103 can quickly transfer the temperature to the mounting cavity 101, so that the device can quickly and automatically compensate for thermal expansion and contraction according to the ambient temperature, thereby ensuring that the circuit can operate normally. At the same time, when the cable is running, the heat generated by itself can also be dissipated to the outside of the device through the temperature-conducting groove 103.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. The various components mentioned in this utility model are common technologies in the existing field. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A watertight connecting device with thermal expansion and contraction compensation function, comprising a first mounting seat (1) and a second mounting seat (3), characterized in that, The first mounting base (1) and the second mounting base (3) are both T-shaped hollow columnar structures with one end thick and the other end thin. A first connecting line (2) is provided inside the first mounting base (1), and a first connector (201) is provided at the end of the first connecting line (2). A second connecting line (4) is provided inside the second mounting base (3), and a second connector (401) is provided at the end of the second connecting line (4). The first connector (201) and the second connector (401) are plugged into each other. The first mounting base (1) is provided with a temperature compensation structure that can automatically adjust according to changes in ambient temperature. The temperature compensation structure includes a piston (5). The piston (5) is provided inside the mounting cavity (101) provided at the end of the first mounting base (1). There is air between the piston (5) and the bottom of the mounting cavity (101) that drives the piston (5) to move by thermal expansion and contraction. The first mounting base (1) and the second mounting base (3) are fixedly connected by connecting the piston (5) to the connecting part provided at the end of the second mounting base (3).
2. The watertight connection device with thermal expansion and contraction compensation function according to claim 1, characterized in that, A protrusion is provided at the bottom of the mounting cavity (101). The protrusion creates a gap for storing air between the piston (5) and the bottom of the mounting cavity (101), thereby creating a partial air gap between the piston (5) and the bottom of the mounting cavity (101). The connecting component includes a mounting bolt (6), which passes through the mounting hole (301) at the end of the second mounting seat (3) and forms a threaded connection with the connecting hole (501) at the end of the piston (5).
3. The watertight connection device with thermal expansion and contraction compensation function according to claim 2, characterized in that, The first connector (201) is located inside the mounting groove at the end of the first mounting base (1), forming an annular groove (102) between the outer wall of the first connector (201) and the inner wall of the mounting groove. The end of the second mounting base (3) has an annular protrusion (302), which is inserted into the annular groove (102).
4. A watertight connection device with thermal expansion and contraction compensation function according to claim 3, characterized in that, The annular groove (102) is provided with a first sealing gasket (9), and the annular protrusion (302) at the end of the second mounting seat (3) presses against the first sealing gasket (9). A second sealing gasket (10) is provided at the connection position between the first mounting seat (1) and the second mounting seat (3).
5. A watertight connection device with thermal expansion and contraction compensation function according to claim 1, characterized in that, The first mounting base (1) and the second mounting base (3) are both provided with external threads (7), and the external threads (7) are both threaded with nuts (8). By rotating the nuts (8), the first mounting base (1) is fixed to the first connecting line (2), and the second mounting base (3) is fixed to the second connecting line (4).
6. A watertight connection device with thermal expansion and contraction compensation function according to claim 1, characterized in that, Cable protection heads (11) are provided at the outer ends of the first mounting base (1) and the second mounting base (3). The cable protection heads (11) are flexible structures with uniform expansion grooves on their outer surfaces.
7. A watertight connection device with thermal expansion and contraction compensation function according to claim 4, characterized in that, Temperature-conducting grooves (103) are provided alternately on the outer arc surface and the inner arc surface near the mounting cavity at the end of the first mounting base (1).