A piston type exhaust valve

Abstract

The present invention relates to the technical field of exhaust valves, and specifically to a piston exhaust valve, wherein a horizontal piston rod can move horizontally in a horizontal groove of a valve body; a vertical piston rod can move up and down in a vertical groove of the valve body; a float can move up and down in the vertical groove of the valve body; one end of an exhaust pipe is connected to the vertical groove of the valve body, and the other end of the exhaust pipe is connected to the horizontal groove of the valve body; the top of the float is connected to the vertical piston rod, and the top of the vertical piston rod is circumferentially against the horizontal piston rod, the float moves upward, driving the vertical piston rod to move upward, and the vertical piston rod drives the horizontal piston rod to move horizontally, so that the horizontal air vent of the float, the exhaust pipe, the vertical air vent of the horizontal piston rod and the exhaust hole are interconnected, and the valve has the advantages that the number of horizontal piston rods can be set to two, four or even more according to the exhaust volume requirements of the system; the exhaust pressure value of the system can be set by changing multiple parameters such as the size of the internal cavity of the float, its own weight, and the elastic force of the spring.

Description

Technical Field

[0001] The invention relates to the technical field of exhaust valves, in particular to a piston type exhaust valve. Background Art

[0002] Automatic exhaust valve is a device used to exhaust during the operation of HVAC system and HVAC system. During the operation of HVAC system and HVAC system, the gases released when water is heated, such as water vapor, hydrogen, oxygen, etc., will damage the system and reduce the thermal effect. If these gases cannot be discharged in time, many adverse consequences will occur. Such as: corrosion caused by oxidation; the formation of air pockets in the radiator; the unsmooth and unbalanced circulation of hot water, which makes some radiators partially not hot; the noise when the pipeline is running with gas; the vortex phenomenon of the circulating pump. Therefore, the exhaust gas in the system must be discharged in time, which shows the important role of using automatic exhaust valve.

[0003] Conventional exhaust valves such as Figure 7 As shown, it includes a valve body and a spherical float. The valve body is provided with a spherical float. When gas enters the valve body, the spherical float drops the pulling arm, thereby opening the exhaust switch, and the gas is discharged from the exhaust hole. After the gas is discharged, the working fluid level rises, the spherical float rises, and the pulling arm rises, so that the exhaust switch is closed.

[0004] Due to the use of a spherical float, the force on the float is uneven, which will affect the exhaust efficiency, exhaust sensitivity and exhaust stability. Summary of the invention

[0005] The object of the present invention is to solve the deficiencies of the prior art and provide a piston exhaust valve to improve the exhaust sensitivity and exhaust efficiency of a HVAC system and a HVAC system.

[0006] In order to achieve the above-mentioned purpose, a piston-type exhaust valve is designed, including a valve body, a valve cover and a pipeline, characterized in that: a vertical groove and a plurality of horizontal grooves are provided in the valve body, the vertical groove and the horizontal groove of the valve body are connected, the top of the vertical groove of the valve body is connected to the valve cover, the bottom of the vertical groove of the valve body is connected to the pipeline, one end of the horizontal groove of the valve body is connected to the valve cover, and the other end of the horizontal groove is connected to the vertical groove, and an exhaust hole is provided on the horizontal groove of the valve body; the exhaust valve also includes: a plurality of horizontal piston rods, the horizontal piston rod is provided with a vertical vent hole, and the horizontal piston rod can move horizontally in the horizontal groove of the valve body; a vertical piston rod, the A vertical piston rod can move up and down in the vertical groove of the valve body; a float, the float is provided with a plurality of horizontal vents, the float can move up and down in the vertical groove of the valve body; a plurality of exhaust pipes, one end of each exhaust pipe is connected to the vertical groove of the valve body, and the other end of the exhaust pipe is connected to the horizontal groove of the valve body; the top of the float is connected to the vertical piston rod, the top of the vertical piston rod is circumferentially against the horizontal piston rod, the float moves upward, driving the vertical piston rod to move upward, and the vertical piston rod drives the horizontal piston rod to move horizontally, so that the horizontal vent of the float, the exhaust pipe, the vertical vent of the horizontal piston rod and the exhaust hole are interconnected.

[0007] Preferably, a spring is provided in the horizontal groove of the valve body, one end of the spring is connected to the valve cover of the horizontal groove, and the other end of the spring is connected to the horizontal piston rod.

[0008] Preferably, a lubricating oil film is provided on the inner wall of the horizontal groove of the valve body and the inner wall of the vertical groove of the valve body.

[0009] Preferably, the inner diameter of the horizontal groove of the valve body is consistent with the outer diameter of the horizontal piston rod.

[0010] Preferably, the valve body is provided with four horizontal grooves, which are distributed at 90°, and a horizontal piston rod is provided in each horizontal groove.

[0011] Preferably, a plurality of fixing supports are provided on the inner wall of the vertical groove of the valve body, and the fixing supports are used for placing floats.

[0012] Preferably, a horizontal limiting rod is provided at the bottom of the float.

[0013] Preferably, a support rod is fixedly provided at the bottom of the vertical groove of the valve body, and a fixed piston is connected to the upper end of the support rod. The shape of the fixed piston is compatible with the horizontal limiting rod of the float, and the fixed piston is used to limit the upward movement of the float.

[0014] Preferably, the inner diameter of the vertical groove of the valve body is consistent with the outer diameter of the float.

[0015] Preferably, a limit groove is provided on the inner wall of the vertical groove of the valve body, and a limit pin is provided on the outer wall of the float, and the limit groove and the limit pin are used to ensure that the float does not rotate in the vertical groove.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The number of horizontal piston rods can be set to two, four or even more according to the system exhaust volume requirements;

[0018] 2. The system exhaust pressure value can be set by changing the size of the float's internal cavity, its own weight, spring force and other parameters;

[0019] 3. The water piston rod is movable. It moves in the horizontal direction under the joint action of the spring force and the horizontal component of the vertical piston rod thrust. When it moves to the corresponding position, the vent hole connects with the exhaust pipe to exhaust.

[0020] 4. The fixed vertical piston rod is fixed on the valve body. It is stationary relative to the valve body. The float can move in the vertical direction. When it moves to the corresponding position, the vent hole connects with the exhaust pipe to exhaust.

[0021] 5. The vertical piston rod and float act as a piston valve to control the gas and liquid working medium in the system to enter and exit the float;

[0022] 6. The inner wall of the valve body is provided with a limit groove, and the outer wall of the float is connected with a limit pin, so that the float and the movable vertical piston rod can only move in the vertical direction but cannot rotate in the horizontal direction;

[0023] 7. When the float rises to a certain position, that is, when the system reaches the exhaust pressure, all the ventilation channels inside the automatic exhaust valve move to the connected position to achieve automatic exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view of the piston exhaust valve of the present invention;

[0025] Figure 2 The present invention Figure 1 Middle AA section;

[0026] Figure 3 The present invention Figure 1 Middle BB section;

[0027] Figure 4 The present invention Figure 2 Middle CC section;

[0028] Figure 5 It is an AA cross-sectional view of the present invention in a connected state;

[0029] Figure 6 The present invention Figure 2 Enlarged view of part I;

[0030] Figure 7 It is a schematic diagram of the existing exhaust valve structure;

[0031] In the figure: 1. Valve cover 2. Exhaust 3. Bolt fasteners 4. Exhaust cap 5. Spring 6. Valve body 7. Horizontal piston rod 8. Spring back 9. Horizontal groove 10. Vertical piston rod 11. Float 12. Exhaust pipe 13. Fixed piston 14. Fixed support 15. Support rod 16. Flange 17. Vertical vent 18. Bolt hole 19. Horizontal vent 20. Lubricating oil film 21. Limit groove 22. Limit pin 23. Ball float 24. Lever 25. Vertical groove. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings, and the structure and principle of the present invention are very clear to people in the field. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] Embodiment 1: The present invention provides a piston exhaust valve, such as Figure 1-Figure 3 As shown, a vertical groove and several horizontal grooves are provided in the valve body, the top and bottom of the vertical groove are connected, the top of the vertical groove is connected to the valve cover by bolt fasteners, the bottom of the vertical groove is connected to the pipeline, and the two ends of the horizontal groove are connected, one end is connected to the valve cover by bolt fasteners, and the other end is connected to the vertical groove. Exhaust holes are opened at the upper and lower parts of the horizontal groove of the valve body, and several exhaust holes are provided on the vertical groove of the valve body to connect to the inside of the vertical groove. An exhaust cap is provided on the exhaust hole at the upper part of the horizontal groove of the valve body, and the exhaust hole at the lower part of the horizontal groove is connected to the exhaust hole of the vertical groove by an exhaust pipe. A horizontal piston rod is provided in each horizontal groove, and a vertical vent is provided on the horizontal piston rod. The horizontal piston rod can move horizontally in the horizontal groove. A vertical piston rod and a float are provided in the vertical groove. The float and the vertical piston rod can move up and down in the vertical groove, and a horizontal vent is provided on the float.

[0034] The piston type exhaust valve described in the present invention also has the following optimized design:

[0035] 1. The float adopts a box shell type with a closed top. The internal space is used to store the gas before the valve body is exhausted and the liquid working medium in the system;

[0036] 2. The number of horizontal piston rods and horizontal slots can be set according to the requirements of the system exhaust volume.

[0037] Example 2, see Figure 1-Figure 4In a preferred embodiment, the valve body has a vertical groove and four horizontal grooves, the four horizontal grooves are arranged at 90 degrees, the top and bottom of the vertical groove are connected, the top is connected to the valve cover by bolt fasteners, the bottom of the vertical groove is connected to the pipeline, the four horizontal grooves are connected at both ends, one end is connected to the valve cover by bolt fasteners, and the other end is connected to the vertical groove. A horizontal piston rod is arranged in each horizontal groove, and a vertical vent is opened on the horizontal piston rod. The outer diameter of the horizontal piston rod is consistent with the inner diameter of the horizontal groove of the valve body. A lubricating oil film is arranged on the inner wall of the horizontal groove of the valve body to reduce the friction of the horizontal piston rod. The horizontal piston rod is connected to the valve cover by a spring, and the elastic force of the spring is balanced with the pressure of the vertical piston rod on the horizontal piston rod. Exhaust holes are opened at the upper and lower parts of the horizontal groove of the valve body, an exhaust cap is arranged on the upper exhaust hole, and the lower exhaust hole is connected to the exhaust pipe. During the horizontal movement of the horizontal piston rod, the vertical vent on the horizontal piston rod, the exhaust hole in the horizontal groove and the exhaust pipe are connected. A vertical piston rod and a float are provided in the vertical groove of the valve body. The vertical piston rod is arranged on the top of the float. The periphery of the top of the hammer piston rod abuts against four horizontal piston rods. The outer diameter of the float is consistent with the inner diameter of the vertical groove. The inner wall of the vertical groove is provided with a lubricating oil film to reduce the friction of the float moving up and down in the vertical groove. A fixed support is provided on the inner wall of the bottom of the vertical groove, and the fixed support is used to place the float. A support rod is fixedly connected to the bottom of the vertical groove, and a fixed piston is connected to the upper part of the support rod. A horizontal limit rod is provided at the bottom of the float. The fixed piston is matched in shape with the horizontal limit rod to limit the upward movement of the float. There are also four exhaust holes on the vertical groove, and the exhaust holes are connected to the exhaust holes of the horizontal groove through an exhaust pipe. There are also four horizontal air holes on the float. During the upward movement of the float, the horizontal air holes of the float are connected to the exhaust pipe. See. Figure 6 A limit groove is opened on the inner wall of a section where the float moves in the vertical groove, and a limit pin is arranged outside the float. The limit groove and the limit pin are used to prevent the float from rotating in the vertical groove.

[0038] Example 3, see Figure 2 and Figure 5 The working principle of the piston exhaust valve described in the present invention is as follows:

[0039] The valve body is connected to the system pipeline through a flange and installed at a high position. When there is no gas in the pipeline, the float falls on the fixed support under its own gravity, the piston valve opens, the exhaust channel is in a non-connected state, and there is a certain liquid level inside the valve. The entire valve state is as follows: Figure 2 shown.

[0040] As the system runs, gas is generated inside. The gas rises with the pipe and gathers inside the float cavity. The pressure inside the cavity gradually increases, squeezing the working fluid surface downward while pushing the float upward. The float pushes the vertical piston rod upward. The horizontal component of the thrust of the vertical piston rod on the horizontal piston rod causes the horizontal piston rod to move in the horizontal direction. At this time, the spring is compressed, the vertical vent, exhaust pipe, and horizontal vent are in a connected state, the piston valve is closed, and the exhaust valve exhausts air. The state of the entire valve is as follows: Figure 5 shown.

[0041] After the exhaust valve exhausts, the pressure inside the valve body drops, the working fluid level rises, and the entire valve state returns to normal. Figure 2 shown.

[0042] See also Figure 1-Figure 7 The displacement transmission inside the exhaust valve of the present invention is linear transmission, and the displacement transmission path is: float → vertical piston rod → horizontal piston rod → spring → horizontal piston rod → vertical piston rod → float, and there is no displacement loss in the whole process. The structure diagram of the conventional automatic exhaust valve is shown in FIG. Figure 7 As shown, its working principle is: when the pressure inside the valve body is relatively small, the spherical float floats in the liquid working medium. At this time, the force arm rises, and the other end closes the exhaust cap, and the valve is in a non-exhaust state. As the gas inside the valve body gathers, the pressure increases, and the working medium liquid level decreases under the action of the gas pressure, and the spherical float moves downward accordingly. At this time, the force arm droops, the exhaust cap opens, and the valve is in an exhaust state. Since the float adopts a spherical structure, the working medium liquid pressure or gas pressure on the spherical surface of the spherical structure is uneven. Under the working condition, the spherical float will vibrate, and the entire displacement transmission process is greatly disturbed. The float used in the piston exhaust valve of the present invention is a box-type structure, and the internal upper surface is a flat square. The gas pressure is uniform, the valve opens and closes quickly, and the exhaust is sensitive.

Claims

1. A piston exhaust valve, comprising a valve body, a valve cover and a pipeline, characterized in that: The valve body is provided with a vertical groove and a plurality of horizontal grooves, the vertical groove and the horizontal groove of the valve body are connected, the top of the vertical groove of the valve body is connected to the valve cover, the bottom of the vertical groove of the valve body is connected to the pipeline, one end of the horizontal groove of the valve body is connected to the valve cover, and the other end of the horizontal groove is connected to the vertical groove, and the horizontal groove of the valve body is provided with an exhaust hole; The exhaust valve further comprises: A plurality of horizontal piston rods, each of which is provided with a vertical vent hole, and the horizontal piston rod can move horizontally in the horizontal groove of the valve body; A vertical piston rod, the vertical piston rod being able to move up and down in the vertical groove of the valve body; A float, wherein a plurality of horizontal vent holes are provided on the float, and the float can move up and down in the vertical groove of the valve body; A plurality of exhaust pipes, one end of each exhaust pipe is connected to the vertical groove of the valve body, and the other end of the exhaust pipe is connected to the horizontal groove of the valve body; The top of the float is connected to the vertical piston rod, and the top of the vertical piston rod is against the horizontal piston rod. The float moves upward, driving the vertical piston rod to move upward, and the vertical piston rod drives the horizontal piston rod to move horizontally, so that the horizontal vent hole of the float, the exhaust pipe, the vertical vent hole of the horizontal piston rod and the exhaust hole are interconnected.

2. A piston type exhaust valve according to claim 1, characterized in that: A spring is arranged in the horizontal groove of the valve body, one end of the spring is connected to the valve cover of the horizontal groove, and the other end of the spring is connected to the horizontal piston rod.

3. A piston type exhaust valve according to claim 1, characterized in that: A lubricating oil film is provided on the inner wall of the horizontal groove of the valve body and the inner wall of the vertical groove of the valve body.

4. A piston exhaust valve according to any one of claims 1 to 3, characterized in that: The inner diameter of the horizontal groove of the valve body is consistent with the outer diameter of the horizontal piston rod.

5. A piston type exhaust valve according to any one of claims 1 to 3, characterized in that: The valve body is provided with four horizontal grooves, which are distributed at 90 degrees, and a horizontal piston rod is arranged in each horizontal groove.

6. A piston type exhaust valve according to claim 1, characterized in that: A plurality of fixing supports are arranged on the inner wall of the vertical groove of the valve body, and the fixing supports are used for placing floats.

7. A piston type exhaust valve according to claim 1, characterized in that: A horizontal limiting rod is arranged at the bottom of the float.

8. A piston type exhaust valve according to claim 7, characterized in that: A support rod is fixedly arranged at the bottom of the vertical groove of the valve body, and a fixed piston is connected to the upper end of the support rod. The shape of the fixed piston matches the horizontal limit rod of the float, and the fixed piston is used to limit the upward movement of the float.

9. A piston type exhaust valve according to claim 1, characterized in that: The inner diameter of the vertical groove of the valve body is consistent with the outer diameter of the float.

10. A piston type exhaust valve according to claim 1, characterized in that: A limit groove is arranged on the inner wall of the vertical groove of the valve body, and a limit pin is arranged on the outer wall of the float. The limit groove and the limit pin are used to ensure that the float does not rotate in the vertical groove.

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