Negative pressure type automatic water drain valve

Abstract

The utility model discloses a negative pressure type automatic water drain valve which comprises a water collecting tank body. The one-way valve is detachably fixed to the lower end of the inner side of the water collecting tank body, a cavity communicated with the interior of the water collecting tank body is formed in the inner side of the one-way valve, and a liquid inlet hole is formed in the one-way valve; the first one-way sealing piece is arranged at the upper end of the inner side of the cavity and corresponds to the liquid inlet hole; the base is arranged at the lower end of the inner side of the cavity; through the arrangement of the water collecting tank body, the one-way valve, the first one-way sealing piece, the base and the second one-way sealing piece, regular observation of the water level by personnel and manual water removal work are avoided, the device can utilize the negative pressure working principle to realize automatic closing and opening of the valve for water drainage, and the working efficiency is improved. Automatic drainage is achieved without signal output of the automatic water level electronic alarm device, cable arrangement of the vehicle is reduced, and direct cost input and labor cost are reduced.

Description

Technical Field

[0001] The utility model specifically relates to a negative pressure type automatic drain valve. Background Technique

[0002] In a common rail system, generally, a diesel primary filter is equipped with an automatic water level electronic alarm, and a drain valve is installed before the fuel transfer pump (the inlet end). It is required that the water separation efficiency reaches more than 95%, and there should be enough water storage volume at the bottom. After the diesel primary filter separates the emulsified water and free water in the diesel, because their specific gravity is greater than that of diesel, they sink to the water storage tank. When the water level exceeds the safety water level of the automatic water level electronic alarm and gives an alarm, the deposited water in the water storage tank of the filter is discharged by rotating the knob discharge switch under the filter to achieve the purpose of water removal.

[0003] Currently, in automotive equipment, the sensor is connected to the cab through a cable. The water level situation in the plastic cup under the filter can be understood through the filter water level alarm light device, reminding the driver to drain the water in the filter in time. Currently, generally, signals are transmitted through the water level sensor or the driver and maintenance personnel regularly observe the safety water level. It is necessary to manually open the drain switch for water removal work, and the operation is rather troublesome. The electronic signal may also be damaged, resulting in failure to give an early warning in time. Therefore, we propose a negative pressure type automatic drain valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide a negative pressure type automatic drain valve to solve the problem that the existing drainage of the water liquid in the diesel primary filter requires manual operation and is rather inconvenient as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A negative pressure type automatic drain valve, comprising:

[0006] A water collecting tank body;

[0007] A one-way valve, detachably fixed to the lower end inside the water collecting tank body, and a cavity communicating with the inside of the water collecting tank body is provided inside the one-way valve, and a liquid inlet hole is provided on the one-way valve;

[0008] A first one-way seal, arranged at the upper end inside the cavity and corresponding to the liquid inlet hole;

[0009] A base, arranged at the lower end inside the cavity, and a liquid discharge hole communicating with the cavity is provided in the middle inside the base;

[0010] A second one-way seal, arranged on the base to seal the liquid discharge hole.

[0011] Preferably, the first one-way seal includes a rod body and an umbrella surface, the umbrella surface is integrally formed on the rod body, and the cross-section of the umbrella surface is arc-shaped.

[0012] Preferably, a reinforcing block is provided at the upper end of the outer surface of the rod body, and the reinforcing block is integrally formed with the umbrella surface.

[0013] Preferably, the first one-way seal and the second one-way seal face in opposite directions.

[0014] Preferably, an overflow hole is formed in the circumferential direction at the upper end of the outer surface of the one-way valve, and the cavity and the water collecting tank body are internally connected through the overflow hole.

[0015] Preferably, a groove is formed in the outer surface of the base, and a sealing ring matching with the one-way valve is arranged inside the groove.

[0016] Preferably, the one-way valve is provided with a first shock-absorbing ring, and the lower end inside the one-way valve is provided with a second shock-absorbing ring.

[0017] Preferably, buckles are arranged on the outer surfaces at the upper and lower ends of the base, and clamping grooves matching with the buckles are formed in the lower end inside the cavity.

[0018] Preferably, the outer diameter of the water collecting tank body is larger than the outer diameter of the one-way valve, and reinforcing rib strips are arranged on the outer surface of the water collecting tank body.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0020] By providing a water collecting tank body, a one-way valve, a first one-way seal, a base and a second one-way seal, this patent avoids the need for personnel to regularly observe the water level and perform manual water removal work. This device can utilize the negative pressure working principle to realize the automatic closing and opening of the valve for drainage, and drain water automatically without the signal output of an automatic water level electronic alarm device, reducing the cable layout of the vehicle, reducing the direct cost investment and labor cost, and improving the reliability through automatic drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is an exploded structural schematic diagram of the present utility model;

[0023] Figure 3 is a sectional structural schematic diagram of the one-way valve of the present utility model;

[0024] Figure 4 is a structural schematic diagram of the first one-way seal of the present utility model.

[0025] In the figure: 1. water collecting tank body; 2. one-way valve; 201. cavity; 202. overflow hole; 3. first shock-absorbing ring; 4. first one-way seal; 401. rod body; 402. umbrella surface; 403. reinforcing block; 5. base; 6. sealing ring; 7. second shock-absorbing ring; 8. second one-way seal. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-4 , the present invention provides a technical solution: a negative pressure type automatic drain valve, including:

[0028] Water collecting tank body 1;

[0029] One-way valve 2, detachably fixed to the lower end inside the water collecting tank body 1, and a cavity 201 communicating with the inside of the water collecting tank body 1 is provided inside the one-way valve 2. A liquid inlet hole is provided on the one-way valve 2 to facilitate collecting the water liquid of the fuel coarse filter and temporarily storing the water liquid.

[0030] The first one-way seal 4 is arranged at the upper end inside the cavity 201 and corresponds to the liquid inlet hole, facilitating the sedimentation of the separated water liquid inside the coarse filter to the inside of the cavity 201.

[0031] Base 5 is arranged at the lower end inside the cavity 201, and a liquid discharge hole communicating with the cavity 201 is provided in the middle inside the base 5, facilitating the separated water liquid to be discharged from the inside of the cavity 201 when the diesel engine is in a shutdown state.

[0032] The second one-way seal 8 is arranged on the base 5 to seal the liquid discharge hole, facilitating the control of the one-way discharge of the separated water liquid.

[0033] Preferably, the first one-way seal 4 includes a rod body 401 and an umbrella surface 402. The umbrella surface 402 is integrally formed on the rod body 401, and the cross-section of the umbrella surface 402 is arc-shaped, facilitating better one-way flow of the separated water liquid of the fuel coarse filter inside the one-way valve 2, so as to facilitate the derivation of the water liquid.

[0034] Preferably, a reinforcing block 403 is arranged on the upper end of the outer surface of the rod body 401, and the reinforcing block 403 is integrally formed with the umbrella surface 402, facilitating the improvement of the connection strength between the rod body 401 and the umbrella surface 402.

[0035] Preferably, the first one-way seal 4 and the second one-way seal 8 face in opposite directions, which facilitates the automatic closing of the first one-way seal 4 under the gravity of the oil when the engine stops, ensuring that the diesel oil inside the coarse filter cannot escape. At the same time, the second one-way seal 8 is opened to discharge the water from the inner side of the cavity 201. When the engine is working, under the negative pressure working state inside, the first one-way seal 4 is opened, and at the same time, the second one-way seal 8 is closed, so that the separated water accumulates and settles on the inner side of the cavity 201.

[0036] Preferably, an overflow hole 202 is provided along the circumferential direction at the upper end of the outer surface of the one-way valve 2. The cavity 201 and the water collecting tank body 1 are internally connected through the overflow hole 202 to facilitate the escape of excess water.

[0037] Preferably, a groove is provided on the outer surface of the base 5, and a sealing ring 6 that cooperates with the one-way valve 2 is provided inside the groove to facilitate improving the sealing effect at the connection between the base 5 and the one-way valve 2.

[0038] Preferably, the one-way valve 2 is provided with a first shock-absorbing ring 3, and the lower end inside the one-way valve 2 is provided with a second shock-absorbing ring 7, which are anti-disconnection devices for the first one-way seal 4 and the second one-way seal 8, ensuring the safe and reliable operation of the one-way valve 2 under extreme conditions.

[0039] Preferably, buckles are provided on the outer surfaces at the upper and lower ends of the base 5, and clamping grooves that cooperate with the buckles are provided at the lower end inside the cavity 201 to facilitate connection and fixation.

[0040] Preferably, the outer diameter of the water collecting tank body 1 is larger than the outer diameter of the one-way valve 2, and reinforcing ribs are provided on the outer surface of the water collecting tank body 1 to facilitate better strength.

[0041] The working principle and usage process of the present utility model: When in use, the knob drain switch of the coarse filter can be cancelled, and the valve is automatically controlled for drainage according to the principle of negative pressure working at the position where the coarse filter is installed in front of the pump. When the engine is working, a negative pressure is generated inside the coarse filter, changing the first one-way seal 4 from the closed state to the open state, and the second one-way seal 8 from the open state to the closed state. The free water separated inside the coarse filter settles into the water collecting tank body 1 and flows to the inner side of the cavity 201 through the open first one-way seal 4; when the engine stops, the negative pressure inside the coarse filter disappears, and under the gravity of the oil, the first one-way seal 4 changes from the open state to the closed state, and the second one-way seal 8 changes from the closed state to the open state under the gravity of the free water. The free water separated inside the coarse filter is discharged from the open second one-way seal 8, completing a cycle of drainage work. Water is automatically stored when the engine is working, and automatic drainage work is carried out after the engine stops, forming a closed-loop operation.

[0042] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A negative pressure type automatic drain valve, characterized in that, Including: A water collecting tank body (1); A one-way valve (2), detachably fixed to the lower end inside the water collecting tank body (1), and a cavity (201) communicating with the inside of the water collecting tank body (1) is provided inside the one-way valve (2), and a liquid inlet hole is provided on the one-way valve (2); A first one-way seal (4), arranged at the upper end inside the cavity (201) and corresponding to the liquid inlet hole; A base (5), arranged at the lower end inside the cavity (201), and a drain hole communicating with the cavity (201) is provided in the middle of the inside of the base (5); A second one-way seal (8), arranged on the base (5) to seal the drain hole.

2. The negative-pressure type automatic drain valve according to claim 1, wherein: The first one-way seal (4) includes a rod body (401) and an umbrella surface (402), the umbrella surface (402) is integrally formed on the rod body (401), and the cross section of the umbrella surface (402) is arc-shaped.

3. The negative-pressure type automatic water drain valve according to claim 2, wherein: A reinforcing block (403) is arranged on the upper end of the outer surface of the rod body (401), and the reinforcing block (403) is integrally formed with the umbrella surface (402).

4. The automatic negative-pressure water discharge valve according to claim 1, characterized in that: The first one-way seal (4) and the second one-way seal (8) face in opposite directions.

5. The automatic negative-pressure drain valve according to claim 1, wherein: An overflow hole (202) is provided along the circumferential direction at the upper end of the outer surface of the one-way valve (2), and the cavity (201) and the water collecting tank body (1) are internally communicated through the overflow hole (202).

6. The negative pressure type automatic drain valve according to claim 1, characterized in that: A groove is provided on the outer surface of the base (5), and a sealing ring (6) matching with the one-way valve (2) is arranged inside the groove.

7. The automatic negative pressure type water drain valve according to claim 1, characterized in that: The one-way valve (2) is provided with a first shock-absorbing ring (3), and the lower end inside the one-way valve (2) is provided with a second shock-absorbing ring (7).

8. The negative pressure type automatic water drain valve according to claim 1, characterized in that: Snap fasteners are arranged on the outer surfaces of the upper and lower ends of the base (5), and a clamping groove matching with the snap fasteners is provided at the lower end inside the cavity (201).

9. The negative pressure type automatic drain valve according to claim 1, characterized in that: The outer diameter of the water collecting tank body (1) is larger than the outer diameter of the one-way valve (2), and reinforcing ribs are arranged on the outer surface of the water collecting tank body (1).

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