Automatic exhaust valve

Abstract

The utility model discloses an automatic exhaust valve which comprises a shell, a floater and a valve element assembly, a cavity is formed in the shell, and the shell is provided with an air inlet and an air outlet. The valve element assembly comprises an exhaust screw, an elastic piece and a movable valve element, one end of the exhaust screw is fixed to the shell wall of the shell, an airflow channel is formed in the exhaust screw, the head of the movable valve element and one end of the exhaust screw are sleeved with one end of the elastic piece, and the head of the movable valve element blocks the airflow channel of the exhaust screw under the acting force of the elastic piece. The floater is located in the cavity and located on the side close to the air inlet, the tail of the movable valve element is located over the floater, the floater is driven to float upwards under the action of airflow, then the tail of the movable valve element is jacked upwards, the head of the movable valve element opens an inlet of the airflow channel, and the airflow flows out through the cavity, the airflow channel and the air outlet. According to the utility model, the problem that manual exhaust is needed when the fluid transmission system is started is solved, and automatic exhaust of the fluid transmission system can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust devices, in particular to an automatic exhaust valve. Background Art

[0002] Air is often mixed into the fluid transmission system. The presence of gas will accelerate the temperature rise and oxidation of the system medium, shorten the service life of the medium, and affect the rigidity and response speed of the system. When the system working pressure changes, the bubbles in the medium will shrink and expand sharply, and cavitation and cavitation will occur, causing noise and vibration in the system. The traditional method of deflation is to set a deflation needle valve or exhaust screw plug at the outlet of the hydraulic pump or the highest point of the pipeline. This method is completely dependent on manual operation, which not only cannot achieve automatic exhaust, but also is effective in some occasions. For example, for a transmission system with constant pressure start, the gas cannot be automatically discharged when the pump starts, which will endanger downstream components; for dangerous high-temperature transmission systems or pipeline systems without operating space, manual exhaust will no longer be applicable. In order to solve the problem of automatic exhaust when the fluid transmission system is started, no manual participation is required, and it will automatically close after exhaust. Utility Model Content

[0003] The main purpose of the utility model is to provide an automatic exhaust valve, which solves the problem that manual exhaust is required when the fluid transmission system is started, and can realize automatic exhaust of the fluid transmission system.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the utility model provides an automatic exhaust valve, including a shell, a float and a valve core assembly, the interior of the shell forms a cavity, one side of the shell is provided with an air inlet, the other side is provided with an air outlet, and the side where the air outlet is located is defined as the lower side;

[0005] The valve core assembly includes an exhaust screw, an elastic member and a movable valve core, one end of the exhaust screw is fixed to the shell wall of the shell, an air flow channel is provided inside the exhaust screw, one end of the elastic member is sleeved on the head of the movable valve core and one end of the exhaust screw, and the head of the movable valve core blocks the air flow channel of the exhaust screw under the action of the elastic member;

[0006] The float is located in the cavity and on the side close to the air inlet, and the tail of the moving valve core is located directly above the float. Under the action of the airflow, the float is driven to float upward and then push the tail of the moving valve core so that the head of the moving valve core opens the inlet of the airflow channel, and the airflow flows out through the cavity, the airflow channel and the air outlet.

[0007] Furthermore, the air outlet of the shell is a threaded opening protruding outward, and the threaded opening is threadedly connected to a nut; a through hole is provided at the upper end of the nut, and the nut is screwed to the threaded opening, and the through hole is connected to the air outlet or not connected.

[0008] Furthermore, the air inlet is a threaded opening protruding outward, and a first sealing ring is clamped on the outer peripheral surface and root of the air inlet.

[0009] Furthermore, the airflow channel includes a transverse airflow channel and a longitudinal airflow channel that are interconnected, the longitudinal airflow channel is connected to the air outlet, and in the natural state of the elastic member, the head of the moving valve core blocks one end of the transverse airflow channel.

[0010] Furthermore, the float is a columnar object, and a downwardly sunken groove is provided on one side of the upper end of the float. When the float floats upward, only the tail of the moving valve core contacts the upper end of the float.

[0011] Furthermore, the outer peripheral surface of the float is provided with a plurality of arc-shaped grooves extending axially; the bottom of the float is also provided with an arc-shaped groove, and the arc-shaped grooves at the bottom of the float are connected with the arc-shaped grooves on the outer peripheral surface of the float.

[0012] Furthermore, the shell includes an upper shell and a lower shell, the air inlet is provided with the lower shell, the air outlet is provided at the upper shell, and the upper shell and the lower shell are sealed and fixedly connected.

[0013] Furthermore, a third sealing ring is provided between the exhaust screw and the housing.

[0014] Furthermore, a sealer is provided at the head of the movable valve core, and the inlet of the transverse airflow channel is sealed by the sealer.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The utility model can automatically discharge the gas inside the fluid transmission system to avoid the adverse effects of air on the transmission system. It does not require manual operation and automatically closes after discharge;

[0017] 2. The utility model provides a nut with a through hole. The nut is screwed deeper so that the through hole of the nut is blocked by the wall of the air outlet. In this way, the exhaust valve is closed and cannot be used for exhaust. If the exhaust valve is used for exhaust, the nut is screwed shallower so that the through hole of the nut is opened. In this way, it can be used for exhaust more effectively, thus meeting various needs of customers.

[0018] 3. The utility model can be widely applied to all fluid transmission systems, especially fluid transmission systems where manual participation is inconvenient or potentially dangerous. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the appearance diagram of the utility model;

[0020] Figure 2 This is one of the axial cross-sectional views of the utility model (not exhausted);

[0021] Figure 3 It is a structural schematic diagram of the float of the utility model;

[0022] Figure 4 This is the second axial cross-sectional view of the utility model (exhaust state);

[0023] In the figure:

[0024] Upper shell 11, air outlet 111, lower shell 12, air inlet 121, cavity 13;

[0025] Float 2, groove 21, arc groove 22;

[0026] Valve core assembly 3, exhaust screw 31, transverse air flow channel 311, longitudinal air flow channel 312, elastic member 32, moving valve core 33, sealer 331;

[0027] Nut 4, through hole 41;

[0028] The first sealing ring 5 , the second sealing ring 6 , and the third sealing ring 7 . DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Embodiment: An automatic exhaust valve, such as Figures 1 to 4 As shown, it includes a housing, a float 2 and a valve core assembly 3, wherein a cavity 13 is formed inside the housing, an air inlet 121 is provided on one side of the housing, and an air outlet 111 is provided on the other side, and the side where the air outlet is located is defined as the lower side;

[0033] In this embodiment, the housing includes an upper housing 11 and a lower housing 12, the air inlet is provided with the lower housing, the air outlet is provided at the upper housing, and the upper housing and the lower housing are sealed and fixedly connected, that is, a second sealing ring 6 is provided between the upper housing and the lower housing.

[0034] The valve core assembly 3 includes an exhaust screw 31, an elastic member 32 and a movable valve core 33. One end of the exhaust screw is fixed to the shell wall of the shell. An air flow channel is provided inside the exhaust screw. One end of the elastic member is sleeved on the head of the movable valve core and one end of the exhaust screw. Under the action of the elastic member, the head of the movable valve core blocks the air flow channel of the exhaust screw.

[0035] The float 2 is in the cavity and is located on the side close to the air inlet 121. The tail of the movable valve core 33 is located directly above the float 2. Under the action of the airflow, the float is driven to float upward and then push the tail of the movable valve core so that the head of the movable valve core opens the inlet of the airflow channel, and the airflow flows out through the airflow channel of the cavity 13 and the air outlet 111. In this embodiment, the elastic member is a spring, but it is not limited thereto, and it only needs to play an elastic reset role.

[0036] In this embodiment, the air outlet 111 of the housing is a threaded opening protruding outward, and the threaded opening is threadedly connected to a nut 4; a through hole 41 is provided at the upper end of the nut, and the nut is screwed to the threaded opening, and the through hole is connected or not connected to the air outlet. For example, if the nut is screwed into the threaded opening to a shallow depth, the through hole can be connected to the air outlet, and the exhaust valve can be used for exhaust; when the nut is screwed into the threaded opening to a deep depth, the wall of the threaded opening can block the through hole, and even if there is enough gas in the equipment to be exhausted, the gas cannot be exhausted, which is suitable for special needs of some customers in special periods, such as when exhaust is not needed temporarily.

[0037] In this embodiment, the air inlet 121 is a threaded opening protruding outward, and a first sealing ring 5 is clamped on the outer peripheral surface and root of the air inlet, which is convenient for installation with the equipment to be exhausted.

[0038] In this embodiment, the airflow channel includes a transverse airflow channel 311 and a longitudinal airflow channel 312 that are interconnected. The longitudinal airflow channel is connected to the air outlet. In the natural state of the elastic member, the head of the movable valve core blocks one end of the transverse airflow channel. In this embodiment, the head of the movable valve core is provided with a sealer 331, and the inlet of the transverse airflow channel is blocked by the sealer. For example, the sealer is made of silicone rubber, but is not limited to this, and can play a sealing role.

[0039] In this embodiment, the float is a columnar object, and a groove 21 is provided on one side of the upper end of the float, and when the float floats upward, only the tail of the moving valve core contacts the upper end of the float. That is, the groove is used to accommodate other structures of the valve core assembly, but one side of the upper end of the float acts on the tail of the moving valve core, so that the sealer of the moving valve core opens the inlet of the transverse airflow channel, so that the cavity and the transverse airflow channel are connected.

[0040] In this embodiment, Figure 2 and Figure 3 As shown, the outer peripheral surface of the float is provided with a plurality of arc grooves 22 extending axially; the bottom of the float is also provided with an arc groove 22, and the arc grooves at the bottom of the float are connected with the arc grooves on the outer peripheral surface of the float, so as to form a flow channel, so that the gas can reach the lateral air flow channel more smoothly from the air inlet.

[0041] In this embodiment, the exhaust screw 31 and the upper shell 11 are provided with a third sealing ring 7 to ensure the air tightness after the exhaust screw is installed on the upper shell.

[0042] The working principle and working process of the utility model are as follows:

[0043] like Figure 2 As shown, the exhaust valve is installed on the equipment (or hydraulic system) that needs to be exhausted and connected through the air inlet thread. When there is not enough gas in the equipment to be exhausted, the float will not float. At this time, the moving valve core is in a horizontal state. Under the action of the elastic member, the sealer at the head of the moving valve core blocks the inlet of the horizontal air flow channel of the column. At this time, the exhaust valve is in a closed state; Figure 4 As shown, when the gas in the equipment to be exhausted reaches a certain amount, the float will rise, and the upper end and one side of the float will push the tail of the valve core upward, so that the sealer at the head of the moving valve core will open the inlet of the horizontal air flow channel. At this time, the gas will be discharged along the cavity, the horizontal air flow channel, the longitudinal air flow channel, the air outlet and the through hole of the nut; when the amount of gas in the equipment to be exhausted is insufficient, the force of the elastic part is relatively large, which will cause the moving valve core to return to a horizontal position, and the sealer will block the inlet of the horizontal air flow channel. In this state, the exhaust valve is closed.

[0044] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic exhaust valve, characterized in that: It comprises a housing, a float and a valve core assembly, wherein the interior of the housing forms a cavity, one side of the housing is provided with an air inlet, and the other side is provided with an air outlet, and the side where the air outlet is located is defined as the lower side; The valve core assembly includes an exhaust screw, an elastic member and a movable valve core, one end of the exhaust screw is fixed to the shell wall of the shell, an air flow channel is provided inside the exhaust screw, one end of the elastic member is sleeved on the head of the movable valve core and one end of the exhaust screw, and the head of the movable valve core blocks the air flow channel of the exhaust screw under the action of the elastic member; The float is located in the cavity and on the side close to the air inlet, and the tail of the moving valve core is located directly above the float. Under the action of the airflow, the float is driven to float upward and then push the tail of the moving valve core so that the head of the moving valve core opens the inlet of the airflow channel, and the airflow flows out through the cavity, the airflow channel and the air outlet.

2. The automatic exhaust valve according to claim 1, characterized in that: The air outlet of the shell is a threaded opening protruding outward, and a nut is threadedly connected to the threaded opening; a through hole is provided at the upper end of the nut, and the nut is screwed to the threaded opening, and the through hole is connected or not connected to the air outlet.

3. The automatic exhaust valve according to claim 1, characterized in that: The air inlet is a threaded opening protruding outward, and a first sealing ring is clamped on the outer peripheral surface and the root of the air inlet.

4. The automatic exhaust valve according to claim 1, characterized in that: The air flow channel includes a transverse air flow channel and a longitudinal air flow channel which are connected to each other. The longitudinal air flow channel is connected to the air outlet. In the natural state of the elastic member, the head of the movable valve core blocks one end of the transverse air flow channel.

5. The automatic exhaust valve according to claim 1, characterized in that: The float is a columnar object, and a groove sunken downward is provided on one side of the upper end of the float. When the float floats upward, only the tail of the moving valve core contacts the upper end of the float.

6. The automatic exhaust valve according to claim 5, characterized in that: The outer peripheral surface of the float is provided with a plurality of arc-shaped grooves extending axially; the bottom of the float is also provided with an arc-shaped groove, and the arc-shaped groove at the bottom of the float is communicated with the arc-shaped groove on the outer peripheral surface of the float.

7. The automatic exhaust valve according to claim 1, characterized in that: The shell comprises an upper shell and a lower shell, the air inlet is provided with the lower shell, the air outlet is provided at the upper shell, and the upper shell and the lower shell are sealed and fixedly connected.

8. The automatic exhaust valve according to claim 1, characterized in that: A third sealing ring is provided between the exhaust screw and the housing.

9. The automatic exhaust valve according to claim 4, characterized in that: A sealer is provided at the head of the moving valve core, and the inlet of the transverse air flow channel is blocked by the sealer.

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