Exhaust valve for heat pipe

Abstract

The utility model relates to the technical field of heat pipes, in particular to an exhaust valve for a heat pipe, which comprises a cap and an end socket, the lower end of the end socket is fixedly mounted at a pipe orifice of the heat pipe, a connecting pipe is fixedly arranged at the upper end of the end socket, external threads are arranged on the outer wall of the connecting pipe, an annular bulge is arranged at an opening at the bottom of the cap, and the end socket is fixedly connected with the cap. The inner wall of the annular protrusion is provided with an internal thread matched with the external thread, the outer edge of the upper end of the connecting pipe is provided with a limiting ring, the top of the cap is provided with a conveying pipe, the cap is internally provided with a sealing ball, and the upper portion of the sealing ball is connected with the top wall of the cap through an elastic piece. A connecting rod arranged in the connecting pipe in a sleeved mode is installed under the sealing ball, and a sealing gasket is installed at the bottom of the connecting rod.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pipes, in particular to an exhaust valve used for a heat pipe. Background Art

[0002] The heat pipe is composed of a heat exchange tube body, a sealing plug installed at one end, and a filling and emptying part installed at the other end. In the prior art, the filling and emptying head of the heat pipe is mainly composed of a head with external threads and internal channels, a steel ball, a sealing strip, and a cap with internal threads and an elastic part. In actual production and manufacturing, the head is first welded to the upper end of the tube body, and then the sealing strip and the steel ball are placed on the top of the inner hole of the head in turn, and finally the cap with the elastic part is screwed on, and the cap is turned upward to loosen the steel ball by the elastic part, and the medium is filled into the heat pipe through the exhaust hole of the cap. After the medium is filled, the cap is turned downward to press the steel ball, so that the steel ball presses the sealing strip to seal.

[0003] The utility model patent with patent number 202120876579.3 proposes a heat pipe filling and emptying head, including: a cap and a head, the lower end of the head is fixedly installed on the pipe mouth of the heat pipe, the upper end of the head is provided with an external thread, and the lower surface of the cap is provided with an internal threaded blind hole, the cap is threadedly connected to the external thread of the head through the internal threaded blind hole, when the cap is threadedly connected to the head, the cap and the head form a cavity, a filling and emptying channel is provided in the head, a steel ball is provided in the cavity, an elastic part is provided between the top of the steel ball and the top wall of the internal threaded blind hole of the cap, and an exhaust through hole connected to the cavity and facing the steel ball is provided on the outer wall of the cap; when the cap is rotated to move downward relative to the head, the cap can press the steel ball downward through the elastic part, so that the steel ball presses down and blocks the channel opening of the filling and emptying channel.

[0004] In the above scheme, the medium is filled into the heat pipe through the exhaust hole during filling, and the gas inside the heat pipe cannot be effectively discharged. After the filling is completed, the cap needs to be tightened, which is inconvenient to operate, cannot effectively simplify the work process, increases the labor intensity of the operator, and cannot effectively improve work efficiency. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an exhaust valve for a heat pipe. The device is installed at both ends of the heat pipe and adjusted to a required working state to ensure effective filling of the device at the bottom of the heat pipe and effective exhaust of the device at the top of the heat pipe, and to ensure that no leakage occurs at the device at the bottom and the top of the heat pipe. After the filling is completed, there is no need for an operator to screw the cap, thereby simplifying the work process, improving work efficiency, and reducing the labor intensity of the operator.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An exhaust valve for a heat pipe comprises a cap and a head, wherein the lower end of the head is fixedly mounted on the pipe mouth of the heat pipe, the upper end of the head is fixedly provided with a connecting pipe, the outer wall of the connecting pipe is provided with an external thread, an annular protrusion is provided at the opening of the bottom of the cap, the inner wall of the annular protrusion is provided with an internal thread matching the external thread, a limiting ring is provided at the outer edge of the upper end of the connecting pipe, a conveying pipe is provided at the top of the cap, a sealing ball is provided inside the cap, the sealing ball is connected to the top wall of the cap through an elastic member directly above, a connecting rod sleeved in the connecting pipe is installed directly below the sealing ball, and a sealing gasket is installed at the bottom of the connecting rod.

[0008] Preferably, the bottom of the limiting ring and the upper end of the head are both provided with sealing strips, and the upper surface and the lower surface of the annular protrusion are provided with sealing strips.

[0009] Preferably, the elastic member includes a telescopic rod and a spring, the telescopic rod is sleeved inside the spring, the upper end of the telescopic rod is fixedly connected to the top wall of the cap, the bottom of the telescopic rod is fixedly connected to the sealing ball, the upper end of the spring is fixedly connected to the top wall of the cap, and the bottom of the spring is fixedly connected to the sealing ball.

[0010] Preferably, the through hole at the bottom of the head is a T-shaped circular hole, and the sealing gasket is a T-shaped frustum adapted to the T-shaped circular hole.

[0011] Preferably, a circular positioning groove is provided on the top of the connecting pipe, the diameter of the sealing ball is smaller than the diameter of the positioning groove, and the diameter of the sealing ball is larger than the inner diameter of the connecting pipe.

[0012] Preferably, the sealing ball is made of metal, and an annular sealing strip is provided at the pipe opening of the connecting pipe inside the positioning groove.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model has a simple structure. By installing the device at both ends of the heat pipe and adjusting the device to the required working state, it is ensured that the device at the bottom of the heat pipe is effectively charged, the device at the top of the heat pipe is effectively exhausted, and it is ensured that there is no leakage in the device at the bottom and the top of the heat pipe. After the charging is completed, the operator does not need to screw the cap, which simplifies the work process, improves work efficiency, and reduces the labor intensity of the operator.

[0015] 2. When the working state of the device is adjusted, since the bottom of the limit ring and the upper end of the head are both provided with sealing strips, and the upper and lower surfaces of the annular protrusion are provided with sealing strips, it is ensured that when the annular protrusion of the device abuts against the head and the limit ring respectively, the sealing strip increases the sealing performance of the device, avoids leakage during filling, and improves the practicality of the device.

[0016] 3. The spring of the device is fixedly connected to the cap and the sealing ball. When the medium pressure inside the heat pipe is stable, it can effectively drive the sealing ball and the sealing gasket to quickly reset, ensuring that the medium inside the heat pipe reaches a stable effect instantly when the filling is completed. The telescopic rod sleeved inside the spring can effectively limit the axial movement of the sealing ball under the action of the spring, avoiding the shaking of the sealing ball and affecting the filling effect.

[0017] 4. The mutual cooperation of the T-shaped circular hole and the T-shaped frustum of the device can not only achieve a sealing effect, but also limit the sealing gasket so that it can effectively abut against the T-shaped circular hole when the spring is reset, thereby ensuring the sealing performance of the sealing gasket. Moreover, the T-shaped circular hole and the T-shaped frustum can be quickly aligned, thereby improving the practicality of the device.

[0018] 5. Under the dual effects of the positioning groove and the telescopic rod, this device ensures that the sealing ball can accurately enter the positioning groove when moving axially, and block the pipe opening of the connecting pipe. Since the diameter of the sealing ball is smaller than the inner diameter of the positioning groove and larger than the inner diameter of the connecting pipe, it ensures that the sealing ball can effectively enter the positioning groove and abut against the pipe opening of the connecting pipe, preventing the sealing ball from extending into the connecting pipe.

[0019] 6. The metal sealing ball of this device can ensure the service life of this device, and at the same time ensure the deadweight of the sealing ball, which can form a better seal for the pipe mouth of the connecting pipe. The sealing strip and the metal sealing ball can prevent the sealing ball from being damaged by collision with the pipe mouth of the connecting pipe under the elastic force of the spring while ensuring the seal, thereby avoiding a reduction in the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a cross-sectional view of the device when it is filled with medium;

[0022] Figure 3 The utility model is a cross-sectional view Figure 2 ;

[0023] Figure 4 The utility model is a cross-sectional view Figure 3 ;

[0024] Figure 5 This is a cross-sectional view of the device when it is used as an exhaust valve.

[0025] In the figure: 1. Cover cap; 2. End cap; 3. Connecting pipe; 4. External thread; 5. Annular protrusion; 6. Internal thread; 7. Positioning groove; 8. Sealing ball; 9. Telescopic rod; 10. Spring; 11. Delivery pipe; 12. Connecting rod; 13. Sealing pad; 14. Limiting ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] An exhaust valve for a heat pipe, the structure of which is as follows Figure 1-Figure 5 As shown, it includes a cap 1 and a head 2, the lower end of the head 2 is fixedly installed on the pipe mouth of the heat pipe, the upper end of the head 2 is fixedly provided with a connecting pipe 3, the outer wall of the connecting pipe 3 is provided with an external thread 4, an annular protrusion 5 is provided at the opening of the bottom of the cap 1, the inner wall of the annular protrusion 5 is provided with an internal thread 6 matching the external thread 4, a limiting ring 14 is provided on the outer edge of the upper end of the connecting pipe 3, a conveying pipe 11 is provided on the top of the cap 1, a sealing ball 8 is provided inside the cap 1, and the sealing ball 8 is connected to the top wall of the cap 1 through an elastic member directly above, and a connecting rod 12 sleeved in the connecting pipe 3 is installed directly below the sealing ball 8, and a sealing gasket 13 is installed at the bottom of the connecting rod 12.

[0029] The bottom of the end cap 2 is welded to the pipe mouth of the heat pipe by argon arc welding to ensure that the device is welded at both ends of the heat pipe. The cap 1 on the device at the bottom of the heat pipe is screwed to make the annular protrusion 5 abut against the limit ring 14, and the sealing gasket 13 at the end of the connecting rod 12 abuts against the end cap 2. At this time, the spring 10 is in a non-accepting state, and the sealing ball 8 is separated from the positioning groove 7;

[0030] The cap 1 on the device at the other end of the heat pipe is screwed so that the annular protrusion 5 abuts against the end cap 2, and the sealing ball 8 inside the cap 1 is in the positioning groove 7 and abuts against the pipe opening of the connecting pipe 3. At this time, the spring 10 is in a stress-free state, and the sealing gasket 13 at the end of the connecting rod 12 is away from the end cap 2;

[0031] The pipe port for external filling is fixedly connected to the delivery pipe 11 on the device at the bottom of the heat pipe. When filling, the medium filled into the cap 1 is filled into the connecting pipe 3. Since the medium filled during filling has a certain pressure, the filled medium can push the sealing gasket 13 from the head 2 to facilitate the medium to be filled into the heat pipe. At this time, the corresponding spring 10 is in a stretched state. When the medium is filled, the gas inside the heat pipe is squeezed to move upward to the heat pipe until it enters the connecting pipe 3. When the medium is continuously filled, the pressure of the gas increases, which can push the sealing ball 8 in the device at the top of the heat pipe upward. At this time, the corresponding spring 10 is in a compressed state, and the gas can be discharged to the outside through the delivery pipe 11 on the cap 1 until the inside of the heat pipe is full of the medium. The excess medium overflows from the delivery pipe 11 of the device at the top of the heat pipe due to the pressure inside the heat pipe.

[0032] At this time, the filling work is stopped. Since the spring 10 has a certain elastic force, the spring 10 at the top of the heat pipe can be reset in a compressed state, and the spring 10 of the device at the bottom of the heat pipe is reset in a stretched state. The sealing ball 8 in the device at the top of the heat pipe is re-contacted with the pipe opening of the connecting pipe 3 in the positioning groove 7 under the action of the spring 10, and the sealing gasket 13 in the device at the bottom of the heat pipe is re-contacted with the head 2 under the action of the spring 10, ensuring that the medium inside the heat pipe is completely blocked inside the heat pipe. There is no need for the operator to perform unnecessary operations on the device at the upper and lower ends of the heat pipe, which reduces the labor intensity of the operator, simplifies the operation process, and improves work efficiency.

[0033] During the filling process, the sealing ball 8 in the device at the bottom of the heat pipe and the pipe opening of the connecting pipe 3 in the positioning groove 7 are always in a separated state, and the sealing gasket 13 in the device at the top of the heat pipe and the head 2 are always in a separated state, ensuring the smoothness of the filling process;

[0034] The device only needs to be adjusted to the required working state during installation, and can achieve the dual effects of filling and exhausting, thereby improving the practicality of the device.

[0035] The bottom of the limiting ring 14 and the upper end of the sealing head 2 are both provided with sealing strips, and the upper surface and the lower surface of the annular protrusion 5 are provided with sealing strips.

[0036] When adjusting the working state of the device, it is ensured that the annular protrusion 5 of the device abuts against the head 2 and the limit ring 14 respectively, and the sealing strip is used to increase the sealing performance of the device to avoid leakage during filling, thereby improving the practicality of the device.

[0037] The elastic member includes a telescopic rod 9 and a spring 10, the telescopic rod 9 is sleeved inside the spring 10, the upper end of the telescopic rod 9 is fixedly connected to the top wall of the cap 1, the bottom of the telescopic rod 9 is fixedly connected to the sealing ball 8, the upper end of the spring 10 is fixedly connected to the top wall of the cap 1, and the bottom of the spring 10 is fixedly connected to the sealing ball 8.

[0038] The spring 10 is fixedly connected to the cap 1 and the sealing ball 8. When the medium pressure inside the heat pipe is stable, it can effectively drive the sealing ball 8 and the sealing gasket 13 to quickly reset, ensuring that the medium inside the heat pipe reaches a stable effect instantly when the filling is completed. The telescopic rod 9 sleeved inside the spring 10 can effectively limit the axial movement of the sealing ball 8 under the action of the spring 10, avoiding the shaking of the sealing ball 8 and affecting the filling effect.

[0039] The through hole at the bottom of the sealing head 2 is a T-shaped circular hole, and the sealing gasket 13 is a T-shaped truncated cone adapted to the T-shaped circular hole.

[0040] The cooperation between the T-shaped circular hole and the T-shaped frustum can not only achieve a sealing effect, but also limit the sealing gasket 13 so that it can effectively abut against the T-shaped circular hole when the spring 10 is reset, thereby ensuring the sealing performance of the sealing gasket 13, and the T-shaped circular hole and the T-shaped frustum can be quickly aligned, thereby improving the practicability of the device.

[0041] A circular positioning groove 7 is provided at the top of the connecting pipe 3 . The diameter of the sealing ball 8 is smaller than the diameter of the positioning groove 7 , and the diameter of the sealing ball 8 is larger than the inner diameter of the connecting pipe 3 .

[0042] Under the dual effects of the positioning groove 7 and the telescopic rod 9, it is ensured that the sealing ball 8 can accurately enter the positioning groove 7 when moving axially, and the pipe opening of the connecting pipe 3 is blocked. Since the diameter of the sealing ball 8 is smaller than the inner diameter of the positioning groove 7 and larger than the inner diameter of the connecting pipe 3, it is ensured that the sealing ball 8 can effectively enter the positioning groove 7 and abut against the pipe opening of the connecting pipe 3, thereby preventing the sealing ball 8 from extending into the connecting pipe 3.

[0043] The sealing ball 8 is made of metal, and an annular sealing strip is arranged at the pipe opening of the connecting pipe 3 inside the positioning groove 7.

[0044] The sealing ball 8 made of metal can ensure the service life of the device, while ensuring the deadweight of the sealing ball 8, which can form a better seal for the pipe mouth of the connecting pipe 3. The sealing strip and the sealing ball 8 made of metal can prevent the sealing ball 8 from causing collision damage with the pipe mouth of the connecting pipe 3 under the elastic force of the spring 10 while ensuring the seal, thereby avoiding a reduction in the sealing effect.

[0045] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or additions, subtractions or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An exhaust valve for a heat pipe, comprising a cap (1) and a sealing head (2), wherein the lower end of the sealing head (2) is fixedly mounted on the pipe mouth of the heat pipe, characterized in that: A connecting pipe (3) is fixedly provided at the upper end of the sealing head (2), and an external thread (4) is provided on the outer wall of the connecting pipe (3). An annular protrusion (5) is provided at the opening of the bottom of the cover cap (1), and an internal thread (6) matching the external thread (4) is provided on the inner wall of the annular protrusion (5). A limiting ring (14) is provided at the outer edge of the upper end of the connecting pipe (3). A conveying pipe (11) is provided at the top of the cover cap (1). A sealing ball (8) is provided inside the cover cap (1), and the sealing ball (8) is connected to the top wall of the cover cap (1) via an elastic member directly above the sealing ball (8). A connecting rod (12) sleeved in the connecting pipe (3) is installed directly below the sealing ball (8), and a sealing gasket (13) is installed at the bottom of the connecting rod (12).

2. An exhaust valve for a heat pipe according to claim 1, characterized in that: The bottom of the limiting ring (14) and the upper end of the sealing head (2) are both provided with sealing strips, and the upper surface and the lower surface of the annular protrusion (5) are also provided with sealing strips.

3. The exhaust valve for a heat pipe according to claim 1, characterized in that: The elastic member comprises a telescopic rod (9) and a spring (10); the telescopic rod (9) is sleeved inside the spring (10); the upper end of the telescopic rod (9) is fixedly connected to the top wall of the cover cap (1); the bottom of the telescopic rod (9) is fixedly connected to the sealing ball (8); the upper end of the spring (10) is fixedly connected to the top wall of the cover cap (1); and the bottom of the spring (10) is fixedly connected to the sealing ball (8).

4. The exhaust valve for a heat pipe according to claim 1, characterized in that: The through hole at the bottom of the sealing head (2) is a T-shaped circular hole, and the sealing gasket (13) is a T-shaped frustum adapted to the T-shaped circular hole.

5. The exhaust valve for a heat pipe according to claim 1, characterized in that: A circular positioning groove (7) is provided at the top of the connecting pipe (3); the diameter of the sealing ball (8) is smaller than the diameter of the positioning groove (7); and the diameter of the sealing ball (8) is larger than the inner diameter of the connecting pipe (3).

6. The exhaust valve for a heat pipe according to claim 5, characterized in that: The sealing ball (8) is made of metal, and an annular sealing strip is provided at the pipe opening of the connecting pipe (3) inside the positioning groove (7).

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