Vacuum tube leakage-proof device for solar hot water heating

Abstract

The invention provides a vacuum tube leakage-proof device for solar hot water heating, and relates to the technical field of solar energy, the vacuum tube leakage-proof device comprises a top end connector, a vacuum tube and a bottom end connector, and a top leakage-proof unit and a bottom leakage-proof unit which are used for preventing fluid leakage are arranged in the top end connector and the bottom end connector respectively. Through linkage of the top end leakage-proof unit and the bottom end leakage-proof unit, when a vacuum tube is broken, a top floating ball drives a sealing block to move downwards to block a sealing cavity under the action of medium pressure, meanwhile, a bottom conical sealing head is synchronously driven to move upwards through a linkage rod, instant synchronous sealing of the two ends is achieved, and a leakage path is thoroughly blocked; the locking unit immediately and mechanically locks the floating ball after sealing is completed, system vibration and impact are resisted through rigid limiting, the problem of micro leakage caused by vibration of a traditional sealing structure is completely avoided, locking can be automatically relieved to enable the floating ball to reset when the system pressure returns to normal after a vacuum pipe is replaced, and the siphon effect is achieved again.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar energy, in particular to a vacuum tube leak-proof device for solar hot water heating. BACKGROUND

[0002] Solar hot water heating systems have been widely used in building heating due to their energy-saving, environmental protection, and low operating cost advantages. Among them, vacuum tube type solar collectors have become one of the mainstream technologies due to their high thermal efficiency and good thermal insulation performance. As the core heat transfer element, the vacuum tube is usually filled with a heat-conducting medium, and heat transfer is achieved through the thermosyphon effect. However, during long-term use, the vacuum tube may be broken due to external impact, thermal stress, or material aging, resulting in leakage of the heat-conducting medium, which not only affects the normal operation of the system, but also may cause environmental pollution and energy waste. Traditional vacuum tube leak-proof technology relies on a single sealing structure, such as a rubber sealing ring or a mechanical sealing device. These structures can maintain sealing when the vacuum tube is intact, but they often fail to respond in time when the vacuum tube is broken, resulting in continuous leakage of the medium. In addition, some existing leak-proof devices usually only seal one end of the vacuum tube, and the other end may still leak a small amount, becoming a leakage point and failing to achieve complete blockage. SUMMARY

[0003] The present application provides a vacuum tube leak-proof device for solar hot water heating, which can solve the problem that traditional vacuum tube leak-proof technology relies on a single sealing structure, such as a rubber sealing ring or a mechanical sealing device. These structures can maintain sealing when the vacuum tube is intact, but they often fail to respond in time when the vacuum tube is broken, resulting in continuous leakage of the medium. In addition, some existing leak-proof devices usually only seal one end of the vacuum tube, and the other end may still leak a small amount, becoming a leakage point and failing to achieve complete blockage.

[0004] The present application provides a vacuum tube leak-proof device for solar hot water heating, which can solve the problem that traditional vacuum tube leak-proof technology relies on a single sealing structure, such as a rubber sealing ring or a mechanical sealing device. These structures can maintain sealing when the vacuum tube is intact, but they often fail to respond in time when the vacuum tube is broken, resulting in continuous leakage of the medium. In addition, some existing leak-proof devices usually only seal one end of the vacuum tube, and the other end may still leak a small amount, becoming a leakage point and failing to achieve complete blockage.

[0005] Preferably, the top leakage prevention unit comprises a top sealing seat, a floating ball and a sealing block, the top sealing seat is fixedly arranged on the inner wall of the top joint, a sealing cavity is arranged in the center of the top sealing seat, a sealing gasket is fixedly arranged on the sealing cavity, the floating ball is arranged above the sealing seat, the outer wall of the bottom of the floating ball is matched with the upper part of the sealing gasket, and the sealing block is fixedly arranged on the bottom of the floating ball.

[0006] Preferably, the bottom leakage prevention unit comprises a bottom sealing seat and a conical sealing head, the bottom sealing seat is fixedly arranged on the inner wall of the bottom joint, a sealing cavity is arranged in the center of the bottom sealing seat, and the conical sealing head is matched with the sealing cavity.

[0007] Preferably, the linkage unit comprises a linkage rod, the linkage rod is movably arranged in the inside of the vacuum tube, the top end of the linkage rod is fixedly connected with the bottom of the sealing block, and the bottom end of the linkage rod is fixedly connected with the top of the conical sealing head.

[0008] Preferably, the left and right sides of the top sealing seat are fixedly arranged with locking units, and the left and right sides of the top joint are arranged with clamping grooves matched with the locking units.

[0009] Preferably, the locking unit comprises a connecting seat, a locking box, a locking spring, a sliding block and a locking clamping block, the connecting seat is fixedly arranged on the left side of the top sealing seat, the locking box is fixedly arranged on the connecting seat, the locking spring is arranged in the locking box, one end of the locking spring is fixedly connected with one side in the locking box, one side of the sliding block is fixedly arranged on the other end of the locking spring, the sliding block is slidingly connected with the inner wall of the locking box, and the locking clamping block is fixedly arranged on the other side of the sliding block and movably arranged through the other side of the locking box and matched with the clamping groove.

[0010] Preferably, the linkage rod is provided with a cleaning unit, the cleaning unit moves synchronously with the linkage rod, and the cleaning unit can contact the sealing gasket of the top sealing seat while moving downward, so as to remove the water scale and impurities on the sealing gasket.

[0011] Preferably, the cleaning unit comprises a plurality of connecting rods, a fixed ring and a cleaning brush, one end of each of the plurality of connecting rods is fixedly connected with the side wall of the linkage rod, the inner wall of the fixed ring is fixedly connected with the other end of each of the plurality of connecting rods, and the cleaning brush is fixedly arranged on the outer wall of the fixed ring.

[0012] Preferably, the left and right sides of the inner wall of the top joint are fixedly provided with two groups of limiting plates, each group of the limiting plates is two in number, and each limiting plate is provided with a sliding groove, the outer front and rear sides of the locking box are fixedly provided with moving blocks, and the locking box can slide up and down in the sliding grooves of the limiting plates through the moving blocks, so as to provide a guiding effect on the movement of the floating ball.

[0013] Preferably, the inner wall of the top joint and the inner wall of the bottom joint are fixedly provided with sealing rings, and the sealing rings are in close contact with the outer wall of the vacuum tube.

[0014] The vacuum tube leakage prevention device for solar water heating provided by the application has the following improvements and advantages compared with the prior art: when the vacuum tube is broken, the top floating ball drives the sealing block to move downward to block the sealing cavity under the action of medium pressure, and at the same time, the bottom conical sealing head is synchronously driven upward through the linkage rod, so that instantaneous synchronous sealing is realized at both ends, and the leakage path is completely blocked; the locking unit mechanically locks the floating ball immediately after sealing is completed, resists system vibration and impact through rigid limiting, completely avoids the micro-leakage problem caused by vibration of the traditional sealing structure, and automatically releases the locking to reset the floating ball when the system pressure returns to normal after the vacuum tube is replaced, so that the siphon effect is re-implemented. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a schematic view of the axial structure of the vacuum tube in the installed state of the present application; Figure 2 is a schematic view of the axial structure of the vacuum tube in the installed state of the present application; Figure 3 is a schematic view of the internal structure of the vacuum tube in the non-blocking state of the present application; Figure 4 is a schematic view of the internal structure of the vacuum tube in the blocking state of the present application; Figure 5 is a schematic view of the internal structure of the vacuum tube in the blocking state of the present application; Figure 4 is an enlarged schematic view of position A of the present application; Figure 6 is a top view of the cleaning unit of the present application; Figure 7 is a top view of the limiting plate, the sliding groove and the locking box of the present application.

[0017] Explanation of reference numerals in the attached figures: 1. Top connector; 2. Vacuum tube; 3. Bottom connector; 4. Top leak-proof unit; 41. Top sealing seat; 42. Float ball; 43. Sealing block; 44. Sealing gasket; 5. Bottom leak-proof unit; 51. Bottom sealing seat; 52. Conical sealing head; 6. Linkage unit; 7. Locking unit; 71. Connecting seat; 72. Locking box; 73. Locking spring; 74. Slider; 75. Locking block; 8. Cleaning unit; 81. Connecting rod; 82. Fixing ring; 83. Cleaning brush; 9. Limiting plate; 10. Moving block; 11. Sealing ring. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Please see Figures 1-7This invention provides a technical solution: a vacuum tube leak-proof device for solar water heating, comprising a top connector 1, a vacuum tube 2, and a bottom connector 3. The top connector 1 is movably fitted onto the top of the vacuum tube 2, and the diameter of the upper half of the top connector 1 is smaller than the diameter of its lower half. The bottom connector 3 is movably fitted onto the bottom of the vacuum tube 2, and the diameter of the lower half of the bottom connector 3 is smaller than the diameter of its upper half. The top connector 1, the vacuum tube 2, and the bottom connector 3 are connected to form a medium flow channel. The larger diameter portions of the top connector 1 and the bottom connector 3 are fitted onto the top and bottom of the vacuum tube 2, respectively. Notably, the top connector 1 and the bottom connector 3... The wall thickness of the smaller diameter portion is the same as the diameter of the vacuum tube 2, ensuring a smooth transition of the medium flow channel. Furthermore, the smaller diameter portions of the top connector 1 and the bottom connector 3 can be aligned with the vacuum tube 2 and kept on the same axis, thus forming a continuous flow channel. During the connection with the outside world, the smaller diameter portion of the top connector 1 is inserted into the water storage tank of the external solar water heating system, and the smaller diameter portion of the bottom connector 3 is inserted into the external water collection pipe. Since the diameters of the top connector 1 and the bottom connector 3 are the same as the diameter of the vacuum tube 2, they can be inserted into the external system normally without changing the internal structure of the vacuum tube 2 or affecting the normal operation of the vacuum tube 2. The top connector 1 and the bottom connector 3 are respectively provided with a top leak-proof unit 4 and a bottom leak-proof unit 5 to prevent fluid leakage. The top leak-proof unit 4 and the bottom leak-proof unit 5 are connected by a linkage unit 6, so that when the vacuum tube 2 is broken, the top leak-proof unit 4 drives the bottom leak-proof unit 5 to seal and prevent leakage simultaneously through the linkage unit 6. The top leak-proof unit 4 is used to seal the top of the vacuum tube 2, and the bottom leak-proof unit 5 is used to seal the bottom of the vacuum tube 2. If any part of the vacuum tube 2 is damaged, the medium in the external water collection pipe will flow out through the damaged position after entering the vacuum tube 2. When the pressure of the medium impacting the top leak-proof unit 4 decreases, the top leak-proof unit 4 will seal the top of the vacuum tube 2, and the bottom leak-proof unit 5 will move downward through the linkage unit 6 to simultaneously seal the bottom of the vacuum tube 2, so as to prevent the medium in the vacuum tube 2 from entering through the bottom of the vacuum tube 2 and then flowing out through the damaged position.

[0022] Specifically, the top leak-proof unit 4 includes a top sealing seat 41, a float 42, and a sealing block 43. The top sealing seat 41 is fixedly installed on the inner wall of the top connector 1, and a sealing cavity is opened in the center of the top sealing seat 41. A sealing gasket 44 is fixedly installed on the sealing cavity. The float 42 is located above the sealing seat, and the outer wall of the bottom of the float 42 matches the top of the sealing gasket 44. The sealing block 43 is fixedly installed at the bottom of the float 42, and the float 42 and the sealing block 43 match the bottom of the sealing gasket 44, ensuring that an effective seal is formed when the float 42 and the sealing block 43 contact the sealing gasket 44 of the sealing cavity. In the non-blocking state of the top leakage prevention unit 4, the medium enters from the bottom end of the vacuum pipe 2, and the medium impacts the floating ball 42 to make it float in the top joint 1. When a part of the vacuum pipe 2 is damaged, the medium enters from the bottom end of the vacuum pipe 2 and flows out from the damaged position. At this time, the impact force on the floating ball 42 disappears, and under the action of pressure, the floating ball 42 and the sealing block 43 will fall into the sealing gasket 44 in the sealing cavity to achieve sealing and prevent the medium in the external water storage tank from flowing out through the damaged position of the vacuum pipe 2.

[0023] Specifically, the bottom leakage prevention unit 5 includes a bottom sealing seat 51 and a conical sealing head 52. The bottom sealing seat 51 is fixedly arranged on the inner wall of the bottom joint 3, and the central part of the bottom sealing seat 51 is also provided with a sealing cavity. The conical sealing head 52 is matched with the sealing cavity. When the top leakage prevention unit 4 is in the blocking state, the linkage unit 6 drives the bottom leakage prevention unit 5 to move downward to synchronously block the sealing cavity in the bottom joint 3, thereby preventing the medium in the vacuum pipe 2 from entering through the bottom end of the vacuum pipe 2 and then flowing out through the damaged position.

[0024] Specifically, the linkage unit 6 includes a linkage rod which is movably arranged in the interior of the vacuum pipe 2. The top end of the linkage rod is fixedly connected with the bottom of the sealing block 43, and the bottom end of the linkage rod is fixedly connected with the top of the conical sealing head 52. The linkage rod is used to connect the top leakage prevention unit 4 and the bottom leakage prevention unit 5 to realize the synchronous movement of the two.

[0025] Specifically, the left and right sides of the top sealing seat 41 are fixedly provided with locking units 7, and the left and right sides of the top joint 1 are provided with clamping grooves matched with the locking units 7. After the floating ball 42 is blocked, under the action of the locking unit 7, the floating ball 42 will be clamped into the clamping groove for positioning, thereby avoiding the vibration force generated by the operation of external water pumps and other equipment from causing the floating ball 42 to slightly float up, and maximizing the sealing performance of the top leakage prevention unit 4 and the bottom leakage prevention unit 5 to prevent the medium from flowing out.

[0026] Specifically, the locking unit 7 includes a connecting seat 71, a locking box 72, a locking spring 73, a sliding block 74, and a locking clamping block 75. The connecting seat 71 is fixedly arranged on the left side of the top sealing seat 41. The locking box 72 is fixedly arranged on the connecting seat 71. The locking spring 73 is located in the locking box 72. One end of the locking spring 73 is fixedly connected with one side of the locking box 72. One side of the sliding block 74 is fixedly arranged on the other end of the locking spring 73. The sliding block 74 is slidably connected with the inner wall of the locking box 72. The locking clamping block 75 is fixedly arranged on the other side of the sliding block 74. The locking clamping block 75 is movably arranged through the other side of the locking box 72 and matched with the clamping groove. The locking spring 73 is arranged inside the locking box 72, one end of which is fixed to the inner wall of the locking box 72, and the other end is connected to the sliding block 74, so that the sliding block 74 can slide smoothly along the inner wall of the locking box 72. The locking block 75 is fixed to the outer side of the sliding block 74, and the movable end thereof passes through the opening in the side wall of the locking box 72 and forms a detachable meshing structure with the clamping groove in the side wall of the top joint 1. When the floating ball 42 is lowered to complete the blocking, the locking block 75 is automatically clamped into the clamping groove of the floating ball 42 under the elastic force of the locking spring 73 to realize mechanical locking; when the vacuum pipe 2 is replaced and the system water pressure returns to normal, the medium pressure also returns to normal, pushing the floating ball 42 to move upwards, overcoming the resistance of the locking spring 73 to make the locking block 75 disengage from the clamping groove, realizing automatic unlocking. The locking block 75 is in an arc structure, which ensures that the locking spring 73 can contract under the action of the medium pressure.

[0027] Specifically, the linkage rod is provided with a cleaning unit 8, and the cleaning unit 8 moves synchronously with the linkage rod. The cleaning unit 8 can contact the sealing gasket 44 of the top sealing seat 41 while moving downward, thereby removing the water scale and impurities on the sealing gasket 44.

[0028] Specifically, the cleaning unit 8 includes a plurality of connecting rods 81, a fixed ring 82, and a cleaning brush 83. One end of each connecting rod 81 is fixedly connected to the side wall of the linkage rod. The inner wall of the fixed ring 82 is fixedly connected to the other end of each connecting rod 81. The cleaning brush 83 is fixedly arranged on the outer wall of the fixed ring 82. When the linkage rod drives the cleaning unit 8 to move downward, the cleaning brush 83 brushes the impurities and water scale remaining on the sealing gasket 44, thereby ensuring the sealing effect of the sealing block 43 and the sealing gasket 44.

[0029] Specifically, two groups of limiting plates 9 are fixedly arranged on the left and right sides of the inner wall of the top joint 1. Each group of limiting plates 9 includes two limiting plates 9. A sliding groove is formed in each limiting plate 9. A moving block 10 is fixedly arranged on the front and rear sides of the locking box 72. The locking box 72 can slide up and down in the sliding groove of the limiting plate 9 through the moving block 10, thereby providing a guiding effect for the movement of the floating ball 42.

[0030] Specifically, a sealing ring 11 is fixedly arranged on the inner wall of the top joint 1 and the inner wall of the bottom joint 3. The sealing ring 11 is in close contact with the outer wall of the vacuum pipe 2. The sealing ring 11 ensures the sealing performance between the top joint 1, the bottom joint 3, and the vacuum pipe 2.

[0031] Working principle: In the normal working state, the heating medium enters the inside of the vacuum pipe 2 from the external collecting pipe through the bottom end joint 3, the medium flow impacts the floating ball 42 of the top leakage prevention unit 4 to keep it in the suspended state, at this time, the linkage rod is in the lifting position, the conical sealing head 52 of the bottom leakage prevention unit 5 is separated from the bottom sealing seat 51, and the medium can flow smoothly through the vacuum pipe 2 into the top end joint 1 and finally return to the water storage tank, forming a complete circulation. When the vacuum pipe 2 is damaged, the medium will leak from the damaged part, causing the pressure in the pipe to drop, and the floating ball 42 loses the supporting force of the medium flow and is driven downward by gravity, and the sealing block 43 is accurately embedded in the sealing cavity of the top sealing seat 41, at this time, the sealing block 43 compresses the sealing gasket 44 to form the first sealing barrier; at the same time, the linkage rod moves downward synchronously with the floating ball 42, and the conical sealing head 52 is forced to be embedded in the sealing cavity of the bottom sealing seat 51 to form the second sealing barrier, realizing synchronous sealing at both ends. During the sealing process, when the floating ball 42 falls to the predetermined position, the arc-shaped locking block 75 of the locking unit 7 is automatically clamped into the clamping groove of the top end joint 1 under the push of the locking spring 73, preventing the floating ball 42 from being displaced due to external vibration through mechanical locking; when the damaged vacuum pipe 2 is replaced and the system is restarted, the restored medium pressure pushes the floating ball 42 upward, overcoming the resistance of the locking spring 73 to make the arc-shaped locking block 75 slide out of the clamping groove to realize automatic unlocking. In the whole working process, the linkage rod drives the cleaning brush 83 of the cleaning unit 8 to move downward synchronously with the sealing action, and the surface of the sealing gasket 44 is scraped and cleaned before the sealing block 43 contacts the sealing gasket 44, effectively removing scale and impurities to ensure the tightness of the sealing surface contact. The limiting plate 9 moves along the set track by guiding the locking box 72 through the sliding groove, ensuring the linearity and stability of the movement of the floating ball 42, and the sealing ring 11 continuously maintains the static sealing of the connection between the joint and the vacuum pipe 2 to prevent leakage of the medium from the assembly gap. The device triggers a pure mechanical linkage response through pressure change, realizes instant self-sealing in the damaged state and automatic reset after system recovery, and the whole process does not require external intervention.

[0032] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leak-proof device for a solar water heating evacuated tube, characterized by, The utility model provides a vacuum tube, including top joint (1), vacuum tube (2) and bottom joint (3), top joint (1) is movably sleeved in the top of vacuum tube (2), and the upper half diameter of top joint (1) is less than the lower half diameter, bottom joint (3) is movably sleeved in the bottom of vacuum tube (2), and the lower half diameter of bottom joint (3) is less than the upper half diameter, top joint (1), vacuum tube (2) and bottom joint (3) are communicated, thereby forming medium flow channel, top joint (1) and bottom joint (3) are provided with top leakproof unit (4) and bottom leakproof unit (5) respectively for preventing fluid leakage, top leakproof unit (4) and bottom leakproof unit (5) are connected through linkage unit (6), thereby realizing when vacuum tube (2) is broken, top leakproof unit (4) drives bottom leakproof unit (5) synchronous plugging leakproof through linkage unit (6).

2. A leak-proof device for a vacuum tube for solar water heating according to claim 1, characterized in that, The top leakproof unit (4) includes a top sealing seat (41), a floating ball (42) and a sealing block (43), the top sealing seat (41) is fixedly arranged on the inner wall of the top joint (1), and a sealing cavity is formed in the center of the top sealing seat (41), a sealing gasket (44) is fixedly arranged on the sealing cavity, the floating ball (42) is located above the sealing seat, and the outer wall of the bottom of the floating ball (42) is matched with the upper part of the sealing gasket (44), and the sealing block (43) is fixedly arranged on the bottom of the floating ball (42), and the floating ball (42) and the sealing block (43) are matched with the lower part of the sealing gasket (44).

3. A leak-proof device for a vacuum tube for solar water heating according to claim 2, characterized in that, The bottom leakproof unit (5) includes a bottom sealing seat (51) and a conical sealing head (52), the bottom sealing seat (51) is fixedly arranged on the inner wall of the bottom joint (3), and a sealing cavity is also formed in the center of the bottom sealing seat (51), and the conical sealing head (52) is matched with the sealing cavity.

4. A leak-proof device for a vacuum tube for solar water heating according to claim 3, characterized in that, The linkage unit (6) includes a linkage rod, the linkage rod is movably arranged in the vacuum tube (2), the top of the linkage rod is fixedly connected with the bottom of the sealing block (43), and the bottom of the linkage rod is fixedly connected with the top of the conical sealing head (52).

5. A leak-proof device for a vacuum tube for solar water heating according to claim 4, characterized in that, Locking units (7) are fixedly arranged on the left and right sides of the top sealing seat (41), and clamping grooves matched with the locking units (7) are formed on the left and right sides of the top joint (1).

6. A leak-proof device for a vacuum tube for solar water heating according to claim 5, characterized in that, The locking unit (7) comprises a connecting seat (71), a locking box (72), a locking spring (73), a sliding block (74) and a locking block (75), the connecting seat (71) is fixedly arranged on the left side of the top sealing seat (41), the locking box (72) is fixedly arranged on the connecting seat (71), the locking spring (73) is located in the locking box (72), one end of the locking spring (73) is fixedly connected with one side in the locking box (72), one side of the sliding block (74) is fixedly arranged on the other end of the locking spring (73), and the sliding block (74) is slidably connected with the inner wall of the locking box (72), the locking block (75) is fixedly arranged on the other side of the sliding block (74), and the locking block (75) movably penetrates the other side of the locking box (72) and matches with the clamping groove.

7. A leak-proof device for a vacuum tube for solar water heating according to claim 6, characterized in that, The linkage rod is provided with a cleaning unit (8), the cleaning unit (8) moves synchronously with the linkage rod, and the cleaning unit (8) can contact the sealing gasket (44) of the top sealing seat (41) while moving downward, so as to remove the water scale and impurities on the sealing gasket (44).

8. A leak-proof device for a vacuum tube for solar water heating according to claim 7, characterized in that, The cleaning unit (8) comprises a plurality of connecting rods (81), a fixed ring (82) and a cleaning brush (83), one end of the connecting rod (81) is fixedly connected with the side wall of the linkage rod, the inner wall of the fixed ring (82) is fixedly connected with the other end of the connecting rod (81), and the cleaning brush (83) is fixedly arranged on the outer wall of the fixed ring (82).

9. A leak-proof device for a vacuum tube for solar water heating according to claim 8, characterized in that, Two groups of limiting plates (9) are fixedly arranged on the left and right sides of the inner wall of the top connector (1), each group of the limiting plates (9) comprises two limiting plates, and a sliding groove is formed in each limiting plate (9), and the moving blocks (10) are fixedly arranged on the front and rear sides of the locking box (72), the locking box (72) can slide up and down in the sliding groove of the limiting plate (9) through the moving block (10), so as to guide the movement of the floating ball (42).

10. A leak-proof device for a vacuum tube for solar water heating according to claim 9, characterized in that, The inner wall of the top connector (1) and the inner wall of the bottom connector (3) are fixedly provided with sealing rings (11), and the sealing rings (11) are in close contact with the outer wall of the vacuum pipe (2).

Images