Anti-freezing three-way valve

Abstract

The utility model discloses an anti-freezing three-way valve, which relates to the technical field of valves and comprises a valve body, a valve core and a handle, a first flow channel and a second flow channel are formed in the valve body, the first flow channel is used for being connected with a water supply main pipe in series, the water inlet end of the second flow channel is connected with the first flow channel, and the water outlet end of the second flow channel is used for being connected with a water supply branch pipe. The water outlet end of the second flow channel is lower than the water inlet end; one end of the valve element is movably arranged in the valve body, the other end of the valve element is arranged outside the valve body and connected with the handle, and the handle can drive the valve element to open or close the water inlet end of the second flow channel. According to the utility model, the outdoor water equipment can be effectively prevented from being frozen.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an antifreeze three-way valve. Background Art

[0002] With the improvement of production safety requirements, eyewash stations have become necessary safety equipment at production sites. They are mainly used for emergency flushing when chemicals splash into the eyes or skin contact accidents occur.

[0003] However, when the existing eyewash station is used in winter (temperature 0°C-15°C), the water in the water supply branch pipe connected thereto often freezes because the water cannot be emptied, thereby causing the eyewash station to be unable to be used normally due to freezing. Utility Model Content

[0004] The purpose of the utility model is to provide an antifreeze three-way valve to solve the problems existing in the above-mentioned related technologies and to effectively prevent freezing of outdoor water-using equipment.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides an antifreeze three-way valve, comprising a valve body, a valve core and a handle, wherein a first flow channel and a second flow channel are formed in the valve body, the first flow channel is used to be connected in series with a water supply main, the water inlet end of the second flow channel is connected to the first flow channel, the water outlet end of the second flow channel is used to be connected to a water supply branch pipe, and the water outlet end of the second flow channel is arranged lower than the water inlet end; one end of the valve core is movably arranged in the valve body, and the other end is arranged outside the valve body and connected to the handle, and the handle can drive the valve core to open or close the water inlet end of the second flow channel.

[0007] Preferably, the valve body is a T-shaped structure, the first flow channel passes through the horizontal part of the valve body, the second flow channel passes through the vertical part of the valve body, and the first flow channel and the second flow channel intersect at the position where the horizontal part and the vertical part of the valve body are connected; the valve core is arranged from top to bottom at the position where the horizontal part and the vertical part of the valve body are connected, the upper end of the valve core is connected to the handle, and the lower end of the valve core can pass through the first flow channel and seal the water inlet end of the second flow channel, and when the lower end of the valve core passes through the first flow channel, the flow area of ​​the first flow channel is greater than zero.

[0008] Preferably, the first flow channel and the second flow channel are both circular flow channels, the valve core is a cylindrical structure, the diameter of the valve core matches the inner diameter of the second flow channel, and the diameter of the valve core is smaller than the inner diameter of the first flow channel.

[0009] Preferably, an annular boss is coaxially provided at the water inlet end of the second flow channel, the annular boss is located in the first flow channel, and the lower end of the valve core can be sealed and connected to the annular boss.

[0010] Preferably, a sealing gasket is provided between the lower end of the valve core and the annular boss.

[0011] Preferably, a connecting block is provided on the horizontal part of the valve body, and the connecting block is located at the position where the horizontal part and the vertical part of the valve body are connected, and a connecting hole is formed between the connecting block and the horizontal part of the valve body, and the valve core is threadedly connected to the connecting hole.

[0012] Preferably, the handle is a handwheel handle.

[0013] Compared with the related art, the utility model has achieved the following technical effects:

[0014] The antifreeze three-way valve provided by the utility model includes a valve body, a valve core and a handle. The application of the valve to an outdoor eyewash in a chemical plant is used as an example for explanation. The valve is installed on a water supply main, so that the first flow channel in the valve body is connected in series with the water supply main, and the second flow channel in the valve body is connected to a water supply branch pipe (the water supply branch pipe is used to supply water to the eyewash). When in use, the valve core is driven by the handle to open or close the water inlet end of the second flow channel, thereby controlling whether water flows out of the eyewash.

[0015] This valve only controls the on-off of the water supply branch pipe without affecting the water circulation in the water supply main pipe (usually the water circulation pump of the water supply network keeps the water circulation in the water supply main pipe). In winter, there is always circulating water in the water supply main pipe and the first flow channel in the valve body, thereby achieving the anti-freezing effect of the water supply main pipe and this valve. At the same time, when it is necessary to cut off the water supply branch pipe, the valve core is driven by the handle to close the water inlet end of the second flow channel. Since the water outlet end of the second flow channel is lower than the water inlet end, it is not easy to accumulate water in the second flow channel. By installing the eyewash station (i.e., the water point) lower than this valve, the water in the water supply branch pipe can be drained when the valve is closed, thereby preventing the eyewash station on the water supply branch from freezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the internal structure of the antifreeze three-way valve provided in an embodiment of the present utility model;

[0018] Figure 2 A schematic diagram of the closed state of the antifreeze three-way valve provided in an embodiment of the present utility model;

[0019] Figure 3 A schematic diagram of the open state of the antifreeze three-way valve provided in an embodiment of the present utility model;

[0020] Figure 4 A schematic diagram of an outdoor eyewash station in a non-water-using state when the antifreeze three-way valve provided by an embodiment of the present invention is applied to the outdoor eyewash station in a chemical plant;

[0021] Figure 5 A schematic diagram of the water usage status of an outdoor eyewash station in a chemical plant when the antifreeze three-way valve provided by an embodiment of the utility model is applied to the eyewash station.

[0022] In the figure: 1-valve body, 2-valve core, 3-handle, 4-first flow channel, 5-second flow channel, 6-annular boss, 7-connecting block. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the utility model is to provide an antifreeze three-way valve to solve the problems existing in the related technology and effectively prevent outdoor water-using equipment from freezing.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, this embodiment provides an antifreeze three-way valve, including a valve body 1, a valve core 2 and a handle 3. A first flow channel 4 and a second flow channel 5 are formed in the valve body 1. The first flow channel 4 is used to be connected in series with the water supply main, the water inlet end of the second flow channel 5 is connected to the first flow channel 4, and the water outlet end of the second flow channel 5 is used to be connected to the water supply branch pipe, and the water outlet end of the second flow channel 5 is arranged lower than the water inlet end; one end of the valve core 2 is movably arranged in the valve body 1, and the other end is arranged outside the valve body 1 and connected to the handle 3. The handle 3 can drive the valve core 2 to open or close the water inlet end of the second flow channel 5.

[0027] In this embodiment, the valve body 1 is a T-shaped structure, the first flow channel 4 passes through the horizontal part of the valve body 1, the second flow channel 5 passes through the vertical part of the valve body 1, and the first flow channel 4 and the second flow channel 5 intersect at the position where the horizontal part and the vertical part of the valve body 1 are connected; the valve core 2 is arranged from top to bottom at the position where the horizontal part and the vertical part of the valve body 1 are connected, the upper end of the valve core 2 is connected to the handle 3, and the lower end of the valve core 2 can pass through the first flow channel 4 and seal the water inlet end of the second flow channel 5, and when the lower end of the valve core 2 passes through the first flow channel 4, the flow area of ​​the first flow channel 4 is greater than zero.

[0028] In this embodiment, the first flow channel 4 and the second flow channel 5 are both circular flow channels, the valve core 2 is a cylindrical structure, the diameter of the valve core 2 matches the inner diameter of the second flow channel 5, and the diameter of the valve core 2 is smaller than the inner diameter of the first flow channel 4.

[0029] In this embodiment, an annular boss 6 is coaxially provided at the water inlet end of the second flow channel 5. The annular boss 6 is located in the first flow channel 4, and the lower end of the valve core 2 can be sealed with the annular boss 6; when the valve is in the closed state, Figure 2 As shown (the direction of the arrow in the figure indicates the direction of water flow), at this time, the valve core 2 moves downward relative to the valve body 1, and the second flow channel 5 is closed through the sealing annular boss 6 at the lower end of the valve core 2. Moreover, since the diameter of the valve core 2 is smaller than the inner diameter of the first flow channel 4, the valve core 2 penetrates into the first flow channel 4 without affecting the water flow in the first flow channel 4. The water circulating in the water supply main (usually the water supply main is kept in circulation by a circulating pump of the water supply network) passes through the first flow channel 4, so that there is always a circulating water flow in the first flow channel 4, which can prevent the valve core 2 from freezing. At the same time, since the water inlet end of the second flow channel 5 is located above the water outlet end, the water in the second flow channel 5 can be drained, so that no water accumulates in the second flow channel 5, effectively preventing the occurrence of freezing. When the valve is in the open state, as shown in FIG. Figure 4 As shown, the lower end of the valve core 2 is separated from the annular boss 6, allowing the water in the first flow channel 4 to enter the second flow channel 5 to supply water to the branch.

[0030] In this embodiment, a sealing gasket is provided between the lower end of the valve core 2 and the annular boss 6 to further ensure the sealing effect.

[0031] In this embodiment, a connecting block 7 is provided on the horizontal portion of the valve body 1. The connecting block 7 is located at the position where the horizontal portion and the vertical portion of the valve body 1 are connected, and a connecting hole is formed between the connecting block 7 and the horizontal portion of the valve body 1. The valve core 2 is threadedly connected to the connecting hole, thereby realizing the up and down movement of the valve core 2 relative to the valve body 1. In addition, the connecting block 7 makes the connection between the valve core 2 and the valve body 1 more stable.

[0032] In this embodiment, the handle 3 is a handwheel handle.

[0033] The use process of the antifreeze three-way valve provided in this embodiment is as follows:

[0034] Take the application of this valve in the outdoor eyewash station of a chemical plant as an example to illustrate. Install this valve on the water supply main, connect the first flow channel 4 in the valve body 1 to the water supply main in series, and connect the second flow channel 5 in the valve body 1 to the water supply branch (the water supply branch is for the eyewash station). When in use, turn the handle 3 to drive the valve core 2 to open or close the water inlet end of the second flow channel 5, thereby controlling whether water flows out of the eyewash station. The non-water state when using this valve is as follows: Figure 4 As shown, the water usage status is as follows Figure 5 shown.

[0035] Regarding the use of this valve, it is necessary to explain:

[0036] First, the use conditions of this valve: the water flow in the water supply main needs to keep flowing (or circulating).

[0037] Second, when using the water point, open the valve, let the water supply branch pipe flow into the water point, and install the water point lower than the valve to facilitate drainage.

[0038] Third, when the water point is not in use, close the valve and drain the water in the water supply branch pipe.

[0039] Fourth, the applicable environment of this valve: outdoor eyewash stations in chemical plants, etc., can also be used directly to replace outdoor faucets.

[0040] Fifth, note: In winter (temperature 0℃-15℃), the water flow in the water supply main must always remain flowing. When the water point is out of use, ensure that the water supply branch pipe is drained of accumulated water.

[0041] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. An antifreeze three-way valve, characterized by: It includes a valve body, a valve core and a handle, wherein a first flow channel and a second flow channel are formed in the valve body, the first flow channel is used to be connected in series with the water supply main, the water inlet end of the second flow channel is connected to the first flow channel, the water outlet end of the second flow channel is used to be connected to the water supply branch pipe, and the water outlet end of the second flow channel is set lower than the water inlet end; one end of the valve core is movably set in the valve body, and the other end is set outside the valve body and connected to the handle, and the handle can drive the valve core to open or close the water inlet end of the second flow channel.

2. The antifreeze three-way valve according to claim 1, characterized in that: The valve body is a T-shaped structure, the first flow channel passes through the horizontal part of the valve body, the second flow channel passes through the vertical part of the valve body, and the first flow channel and the second flow channel intersect at the position where the horizontal part and the vertical part of the valve body are connected; the valve core is arranged from top to bottom at the position where the horizontal part and the vertical part of the valve body are connected, the upper end of the valve core is connected to the handle, and the lower end of the valve core can pass through the first flow channel and seal the water inlet end of the second flow channel, and when the lower end of the valve core passes through the first flow channel, the flow area of ​​the first flow channel is greater than zero.

3. The antifreeze three-way valve according to claim 2, characterized in that: The first flow channel and the second flow channel are both circular flow channels, the valve core is a cylindrical structure, the diameter of the valve core matches the inner diameter of the second flow channel, and the diameter of the valve core is smaller than the inner diameter of the first flow channel.

4. The antifreeze three-way valve according to claim 3, characterized in that: An annular boss is coaxially provided at the water inlet end of the second flow channel. The annular boss is located in the first flow channel, and the lower end of the valve core can be sealed and connected to the annular boss.

5. The antifreeze three-way valve according to claim 4, characterized in that: A sealing gasket is provided between the lower end of the valve core and the annular boss.

6. The antifreeze three-way valve according to claim 3, characterized in that: A connecting block is provided on the horizontal portion of the valve body, and the connecting block is located at a position where the horizontal portion and the vertical portion of the valve body are connected. A connecting hole is formed between the connecting block and the horizontal portion of the valve body, and the valve core is threadedly connected to the connecting hole.

7. The antifreeze three-way valve according to any one of claims 1 to 6, characterized in that: The handle is a handwheel handle.

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