Water pipe negative pressure connecting piece

Abstract

The utility model discloses a negative pressure connecting piece for a water pipe, which belongs to the field of small negative pressure devices in laboratories and comprises a negative pressure connecting piece, a suction hose and a suction head. The negative pressure connecting piece comprises a water inlet pipe and an air inlet pipe; a top pipe opening of the water inlet pipe is hermetically connected with an external faucet; the air inlet pipe is connected to the peripheral side of the top of the water inlet pipe, and the inner wall of the air inlet pipe and the outer wall of the water inlet pipe are arranged at intervals to form a cavity structure; a bottom pipe opening of the water inlet pipe is positioned in a bottom pipe opening of the air inlet pipe; a connecting pipe is arranged on the side of the air inlet pipe; one end of the connecting pipe is communicated with the cavity structure, and the other end of the connecting pipe is connected with the suction head through the suction hose. The negative pressure valve is connected to a water pipeline of a small laboratory, negative pressure is automatically generated when the water pipeline valve is opened, the small negative pressure requirement of the laboratory can be met without additionally arranging negative pressure equipment, and the negative pressure valve is simple in structure and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental equipment, in particular to a water pipe negative pressure connector. Background Art

[0002] In the process of preparing chromosomes in the laboratory, a large amount of methanol and glacial acetic acid are used. After preparation, the waste liquid needs to be pumped out and a small amount of sediment is retained at the bottom of the test tube. Therefore, the suction force cannot be too strong during the adsorption process, otherwise the required sediment will be sucked away. At present, laboratories need to spend a lot of money to purchase negative pressure equipment, but negative pressure equipment is only used when it is necessary to pump waste liquid for a long time. In most cases, the idle time is too long, the equipment cost is high, and it cannot be effectively used. In addition, the negative pressure equipment is noisy, which affects the work. The suction force generated is usually large, and it needs to be equipped with components that limit the air pressure, and a certain amount of installation cost is incurred. Therefore, in view of the special needs of negative pressure in the laboratory, it is necessary to design a negative pressure device with low suction, low noise, arbitrary start and stop, and low cost. Utility Model Content

[0003] The utility model provides a water pipe negative pressure connector, which can be installed on a faucet and generates negative pressure suction through the flow of tap water. It is easy to use, has low noise, is easy to modify, and has low cost. No additional negative pressure equipment is required, and the laboratory's demand for small suction negative pressure is met. The structure is simple and practical.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A water pipe negative pressure connector, comprising a negative pressure connector, a suction hose and a suction head; the negative pressure connector comprises a water inlet pipe and an air inlet pipe; the top pipe opening of the water inlet pipe is sealed and connected to an external faucet; the air inlet pipe is connected to the outer peripheral side of the top of the water inlet pipe, and the inner wall of the air inlet pipe and the outer wall of the water inlet pipe are arranged at intervals to form a cavity structure; the bottom pipe opening of the water inlet pipe is located inside the bottom pipe opening of the air inlet pipe; a connecting pipe is provided on the side of the air inlet pipe; one end of the connecting pipe is connected to the cavity structure, and the other end of the connecting pipe is connected to the suction head through the suction hose.

[0006] Furthermore, a flange extends from the top of the water inlet pipe to the outer peripheral side, so that the cross-section of the water inlet pipe is a T-shaped structure, and a threaded hole connected to the faucet is provided on the top of the water inlet pipe; one end of the air inlet pipe is threadedly connected to the outer peripheral side of the flange, so that a gap is left between the inner wall of the air inlet pipe and the outer wall of the water inlet pipe, forming the cavity structure.

[0007] Furthermore, the bottom of the water inlet pipe gradually shrinks to form a cone.

[0008] Furthermore, the bottom of the air inlet pipe gradually shrinks along the outer wall shape of the water inlet pipe to form a cone.

[0009] Furthermore, a straight pipe section extends downward from the conical bottom of the air inlet pipe.

[0010] Furthermore, the suction hose is configured as a rubber hose.

[0011] Furthermore, the suction head is configured as a glass tube, and the bottom of the glass tube gradually shrinks to form a cone.

[0012] The beneficial effects of the utility model are:

[0013] 1) The utility model is connected to the water pipe valve of a small laboratory. When the water pipe valve is opened, the flow of fluid in the water inlet pipe is used to drive the air in the air inlet pipe to flow out, so that negative pressure is generated in the air inlet pipe, and then one end of the connecting pipe has a suction function. There is no need to purchase additional negative pressure equipment. It is easy to use, has low noise, low cost, simple structure and is practical.

[0014] 2) The bottom of the water inlet pipe and the air inlet pipe are conical in structure, forming a structure that is thick at the top and thin at the bottom, which is conducive to increasing water pressure and improving the water flow speed at the pipe mouth. A straight pipe extends downward from the bottom of the water inlet pipe, allowing the fluid to fully contact the air and making it easier to drive the air in the air inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 It is a structural schematic diagram of the utility model water pipe negative pressure connector when it is installed;

[0017] Figure 2 It is a structural schematic diagram of the negative pressure connecting piece in the utility model;

[0018] Figure ID:

[0019] 1-negative pressure connector, 2-suction hose, 3-suction head, 4-faucet, 11-water inlet pipe, 12-air inlet pipe, 13-cavity structure, 14-connecting pipe, 111-flange, 121-straight pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is referred to as being "set in the middle", it does not only mean being set in the middle, as long as it is not set at both ends within the range defined by the middle. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Reference Figure 1 to Figure 2As shown, a water pipe negative pressure connector includes a negative pressure connector 1, a suction hose 2 and a suction head 3; the negative pressure connector 1 includes a water inlet pipe 11 and an air inlet pipe 12. The top pipe opening of the water inlet pipe 11 is sealed and connected to an external faucet 4, the air inlet pipe 12 is connected to the outer peripheral side of the top of the water inlet pipe 11, and the inner wall of the air inlet pipe 12 is arranged at intervals from the outer wall of the water inlet pipe 11 to form a cavity structure. As one of the preferred solutions, a flange 111 extends from the top of the water inlet pipe 11 to the outer peripheral side, so that the cross section of the water inlet pipe 11 is a T-shaped structure, and a threaded hole connected to the faucet 4 is provided on the top of the water inlet pipe 11. The faucet usually adopts a conventional laboratory triple faucet. The water outlet end of the existing conventional faucet 4 is usually provided with a threaded filter. After the filter is removed, the faucet 4 can be directly threadedly connected to the top pipe opening of the water inlet pipe 11, and a rubber ring seal can be provided between the faucet 4 and the pipe opening of the water inlet pipe 11. One end of the air inlet pipe 12 is threadedly connected to the outer peripheral side of the flange 111, so that a gap is left between the inner wall of the air inlet pipe 12 and the outer wall of the water inlet pipe 11, forming the cavity structure 13. The bottom pipe opening of the water inlet pipe 11 is located inside the bottom pipe opening of the air inlet pipe 12; a connecting pipe 14 is provided on the side of the air inlet pipe 12, and the connecting pipe 14 is welded and fixed to the air inlet pipe 12, and the pipe opening of one end of the connecting pipe 14 is connected to the cavity structure 13; the other end of the connecting pipe 14 is connected to the suction head 3 through the suction hose 2. The suction hose 2 is set as a rubber hose, and the suction head 3 is set as a glass tube, and the bottom of the glass tube 3 gradually shrinks to form a cone. The utility model is connected to the water pipe valve of a small laboratory. When the water pipe valve is opened, the flow of fluid in the water inlet pipe 11 is used to drive the air in the air inlet pipe 12 to flow out, so that negative pressure is generated in the air inlet pipe 12, and then one end of the connecting pipe 14 has a suction function. There is no need to purchase additional negative pressure equipment. The utility model is easy to use, has low noise, low cost, simple structure and is practical.

[0024] In this embodiment, in order to better allow the fluid to contact the air in the cavity structure 13, so as to more easily drive the air to flow out when the fluid flows and to more easily generate negative pressure, the bottom of the water inlet pipe 11 in this embodiment is gradually reduced to form a cone, and the bottom of the air inlet pipe 12 is gradually reduced to form a cone along the shape of the outer wall of the water inlet pipe 11, forming a structure that is thick at the top and thin at the bottom, which is beneficial to increase the water pressure and increase the water flow speed at the pipe mouth, and a straight pipe 121 extends downward from the conical bottom of the air inlet pipe 12, allowing the fluid to fully contact the air and more easily drive the air in the air inlet pipe 12.

[0025] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. Any modification or equivalent substitution that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. A water pipe negative pressure connector, characterized in that: It includes a negative pressure connector, a suction hose and a suction head; the negative pressure connector includes a water inlet pipe and an air inlet pipe; the top pipe opening of the water inlet pipe is sealed and connected to an external faucet; the air inlet pipe is connected to the outer peripheral side of the top of the water inlet pipe, and the inner wall of the air inlet pipe and the outer wall of the water inlet pipe are arranged at intervals to form a cavity structure; the bottom pipe opening of the water inlet pipe is located in the bottom pipe opening of the air inlet pipe; a connecting pipe is provided on the side of the air inlet pipe; one end of the connecting pipe is connected to the cavity structure, and the other end of the connecting pipe is connected to the suction head through the suction hose.

2. A water pipe negative pressure connector according to claim 1, characterized in that: A flange is extended from the top of the water inlet pipe to the outer peripheral side, so that the cross-section of the water inlet pipe is a T-shaped structure, and a threaded hole connected to the faucet is provided on the top of the water inlet pipe; one end of the air inlet pipe is threadedly connected to the outer peripheral side of the flange, so that a gap is left between the inner wall of the air inlet pipe and the outer wall of the water inlet pipe, forming the cavity structure.

3. A water pipe negative pressure connector according to claim 2, characterized in that: The bottom of the water inlet pipe gradually shrinks to form a cone.

4. A water pipe negative pressure connector according to claim 3, characterized in that: The bottom of the air inlet pipe gradually shrinks along the outer wall shape of the water inlet pipe to form a cone.

5. A water pipe negative pressure connector according to claim 1, characterized in that: A straight pipe section extends downward from the conical bottom of the air inlet pipe.

6. A water pipe negative pressure connector according to claim 1, characterized in that: The suction hose is configured as a rubber hose.

7. A water pipe negative pressure connector according to claim 1, characterized in that: The suction head is configured as a glass tube, and the bottom of the glass tube gradually shrinks to form a cone.

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