Drain valve

Abstract

The drain valve comprises a valve body and an ejector rod, a valve cavity is formed in the valve body, and a channel hole is formed in the middle of the valve cavity; the ejector rod is arranged in the channel hole, and the fit clearance between the ejector rod and the channel hole is smaller than 0.5 mm; a first sealing ring is arranged below the ejector rod; the first sealing ring is in close fit with the channel hole; by taking the first sealing ring as a boundary, the outer circumference of the upper section of the ejector rod is provided with at least one axially-distributed liquid discharge groove and at least one axially-distributed liquid discharge groove; the top of the ejector rod is provided with an extending installation face, and the installation face is provided with a notch corresponding to the liquid drainage groove. The ejector rod is thickened till the fit clearance between the ejector rod and the channel hole is smaller than 0.5 mm, so that the ejector rod cannot shake in the ejection process, the liquid drainage groove is formed in the circumference of the ejector rod, liquid drainage, air exhaust and liquid adding are conducted through the liquid drainage groove, and therefore the requirement for the flow of a flow channel can be met, it can be guaranteed that the ejector rod moves stably, and the hidden danger of liquid leakage of the liquid drainage valve is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cooling, and particularly relates to a drain valve. Background Art

[0002] Many lithium batteries are stored in an energy storage cabinet. To ensure that the lithium batteries are at a normal operating temperature, the energy storage cabinet adopts battery cooling technology. Commonly used battery cooling technologies include air cooling and liquid cooling, and among them, liquid cooling technology is the main international development trend. A drain valve is provided in the liquid cooling pipeline, and its main functions are liquid injection, liquid drainage, and air exhaust.

[0003] The existing drain valve is as Figure 6 shown, including a valve body 1, a valve cover 2, an insertion cover, a second ejector rod 8, and an ejector rod spring. The second ejector rod 8 is placed inside the valve body. A channel hole is provided in the middle of the valve body. The second ejector rod 8 includes a second ejector rod body 81 and a second piston block 82 that bulges downward. A top rod spring is sleeved on the second ejector rod body 81. Under the action of the top rod spring, the piston block can block the channel hole inside the valve body to form a closed state. When the drain valve is inserted into an air pipe and the air pipe presses down the second ejector rod 8, the second piston block at the lower end of the second ejector rod 8 can be made to leave the channel hole, and the gap between the second ejector rod body and the channel hole of the valve body forms a flow channel. To ensure the flow rate of the flow channel, the outer diameter of the second ejector rod body 81 is significantly smaller than that of the piston block 82, and the gap with the channel hole is too large. This causes a large shaking amplitude of the second ejector rod when it is ejected, and after the air pipe is pulled out, the second ejector rod 8 cannot ensure that it rebounds in place and may be skewed, ultimately resulting in liquid leakage. Content of the Utility Model

[0004] In order to solve the above problems, the utility model provides a drain valve with good sealing performance, and the internal ejector rod is stably matched with the valve body.

[0005] Therefore, the technical solution of the utility model is: a drain valve, including a valve body and an ejector rod. A valve cavity is provided inside the valve body, and a channel hole is provided in the middle of the valve cavity; the ejector rod is placed in the channel hole, and the fitting gap between the ejector rod and the channel hole is less than 0.5 mm; a first sealing ring is provided below the ejector rod, and the first sealing ring is tightly fitted with the channel hole; and taking the first sealing ring as a boundary, at least one axially distributed drain groove is provided on the outer circumference of the upper section of the ejector rod, and at least one axially distributed drain groove is provided; an extended mounting surface is provided at the top of the ejector rod, and a notch corresponding to the drain groove is provided on the mounting surface.

[0006] On the basis of the above solution and as the preferred solution of the above solution: four axially distributed drain grooves are provided on the outer side of the upper section of the ejector rod, and the mounting surface at the top is a cross-shaped structure.

[0007] On the basis of the above solution and as a preferred solution of the above solution: An annular step surface is provided in the middle of the valve cavity, and a channel hole is in the middle of the annular step surface; A push rod spring is sleeved outside the push rod and abuts against the mounting surface of the push rod and the annular step surface respectively.

[0008] On the basis of the above solution and as a preferred solution of the above solution: It further includes a valve cover and a retaining ring. The valve cover is in threaded fit with the valve body. The retaining ring is placed in the valve cavity. In the initial state, the mounting surface of the push rod is in close fit with the retaining ring, and the first sealing ring below the push rod is in close fit with the channel hole.

[0009] On the basis of the above solution and as a preferred solution of the above solution: A jack is provided in the middle of the valve cover, and a dust plug is provided at the jack.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The push rod is thickened so that the clearance between it and the channel hole is less than 0.5 mm, so that the push rod will not shake during the ejection process. And drainage grooves are provided on the circumference of the push rod, and the drainage grooves are used for draining liquid, exhausting gas, and adding liquid, so that both the requirements for the flow rate of the flow channel can be met, and the movement of the push rod can be ensured to be stable, reducing the hidden danger of liquid leakage of the drain valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a structural sectional view of the present utility model;

[0013] Figure 3 is an exploded view of the parts of the present utility model;

[0014] Figure 4 is a schematic internal structure diagram of the present utility model (hiding the valve body);

[0015] Figure 5 is a schematic structural diagram of the push rod of the present utility model;

[0016] Figure 6 is a structural sectional view of the drain valve in the prior art.

[0017] The labels in the figure are: valve body 1, first annular step surface 11, second annular step surface 12, third annular step surface 13, channel hole 14, valve cover 2, jack 21, retaining ring 3, push rod 4, push rod body 41, piston block 42, mounting surface 43, drainage groove 44, notch 45, push rod spring 5, dust plug 6, first sealing ring 7.

[0018] In the existing structure: second push rod 8, second push rod body 81, second piston block 82. DETAILED DESCRIPTION OF THE INVENTION

[0019] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0020] In addition, such terms as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically and clearly defined.

[0021] Referring to the drawings. The drain valve described in this embodiment includes a valve body 1, a valve cover 2, a retaining ring 3, a push rod 4, and a push rod spring 5. The valve cover 2 is in threaded fit with the valve body 1. The retaining ring 3 is placed inside the valve body 1. A jack 21 is provided in the middle of the valve cover 2, and a dust plug 6 is provided at the jack 21. By removing the dust plug, an air pipe can be inserted into the jack. The valve body and the valve cover are made of aviation aluminum, the push rod, the dust plug, and the retaining ring are made of nylon, and the first sealing ring is made of peroxide EPDM and silicone rubber.

[0022] A valve cavity is provided inside the valve body 1. A first annular step surface 11 is provided in the upper section of the valve cavity, and the retaining ring 3 is placed on the first annular step surface 11. A second annular step surface 12 is provided in the middle section of the valve cavity, and a third annular step surface 13 is provided in the lower section. And a passage hole 14 of the valve cavity is in the middle of the third annular step surface 13.

[0023] A sealing groove is provided at the lower end of the push rod 4, and a first sealing ring 7 is provided in the sealing groove. The first sealing ring 7 is in close fit with the passage hole 14, and the first sealing ring 7 serves to seal the drain valve.

[0024] At the same time, the first sealing ring 7 divides the push rod into a push rod body 41 and a piston block 42. An extended mounting surface 43 is provided at the top of the push rod body 41. The outer diameter of the mounting surface 43 is smaller than the inner diameter of the first annular step surface 11 and larger than the inner diameter of the second annular step surface 12, that is, the second annular step surface 12 can limit the movement range of the push rod 4.

[0025] The outer diameter of the ejector rod body 41 is about the same as that of the piston block 42, so that the clearance between the ejector rod body 41 and the channel hole 14 is less than 0.5 mm, and no shaking occurs when the ejector rod 4 is ejected. In order to ensure the flow rate of the flow channel, four axially evenly distributed liquid discharge grooves 44 are provided on the outer side of the ejector rod body 41, and notches 45 corresponding to the liquid discharge grooves are provided on the mounting surface 43, that is, there are four notches on the mounting surface, showing a cross-shaped structure.

[0026] A ejector rod spring 5 is sleeved on the outer side of the ejector rod body 41, and both ends of the ejector rod spring 5 respectively abut against the top mounting surface 43 of the ejector rod body 41 and the third annular step surface 13.

[0027] In the initial state, the ejector rod spring 5 is in a compressed state. Under the action of the spring, the mounting surface 43 at the top of the ejector rod 4 is in close fit with the retaining ring 3, and the first sealing ring 7 below the ejector rod 4 is in close fit with the channel hole 14.

[0028] When in use, remove the dust plug 6, insert the air pipe into the jack 21 of the valve cover 2, the air pipe presses down the ejector rod 4, so that the first sealing ring 7 on the ejector rod 4 leaves the channel hole 14, the ejector rod body 41 moves down to the channel hole, and a flow channel is formed between the liquid discharge groove 44 on the outer side of the ejector rod body 41 and the channel hole 14, so as to connect the air pipe with the liquid cooling pipeline inside the liquid discharge groove, and realize functions such as liquid injection, liquid discharge and exhaust.

[0029] After use, pull out the air pipe. Under the action of the ejector rod spring 5, the ejector rod 4 resets upward, so that the first sealing ring 7 below the ejector rod 4 is re-closely attached to the channel hole 14. Finally, insert the dust plug 6 back into the jack 21 of the valve cover 2 and wait for the next use.

[0030] The above description is only the preferred implementation mode of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A liquid discharge valve, comprising a valve body and a push rod. A valve cavity is provided inside the valve body, and a channel hole is provided in the middle of the valve cavity. It is characterized in that: The ejector rod is placed in the channel hole, and the clearance between the ejector rod and the channel hole is less than 0.5 mm; a first sealing ring is provided below the ejector rod, and the first sealing ring is closely fitted with the channel hole; and taking the first sealing ring as the boundary, at least one axially distributed liquid drainage groove is provided on the outer circumference of the upper section of the ejector rod, and at least one axially distributed liquid drainage groove is provided; an extended mounting surface is provided at the top of the ejector rod, and a notch corresponding to the liquid drainage groove is provided on the mounting surface.

2. The drain valve according to claim 1, characterized in that: Four axially distributed liquid drainage grooves are provided on the outer side of the upper section of the ejector rod, and the mounting surface at the top is of a cross-shaped structure.

3. The drain valve according to claim 1, wherein: An annular step surface is provided in the middle of the valve cavity, and a channel hole is in the middle of the annular step surface; a ejector rod spring is sleeved outside the ejector rod and abuts against the mounting surface and the annular step surface of the ejector rod respectively.

4. The drain valve according to claim 1, characterized in that: It further includes a valve cover and a retaining ring. The valve cover is in threaded fit with the valve body. The retaining ring is placed in the valve cavity. In the initial state, the mounting surface of the ejector rod is closely fitted with the retaining ring, and the first sealing ring below the ejector rod is closely fitted with the channel hole.

5. The drain valve according to claim 4, characterized in that: A jack is provided in the middle of the valve cover, and a dust plug is provided at the jack.

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