Anti-locking structure of gear pump for fire fighting

Abstract

The utility model relates to the technical field of fire-fighting gear pumps, in particular to an anti-locking structure of a fire-fighting gear pump, which comprises a lubricating device arranged on a pump body shell, the lubricating device comprises an output pipe arranged on the pump body shell, a storage box is arranged above a pump body, a lubricating medium is arranged in the storage box, and the pump body shell is provided with an oil inlet and an oil outlet. And a control device for controlling the release of the lubricating medium is arranged on the output pipe, so that the gear pump can be effectively prevented from being damaged or stuck due to overheating, and the reliability and the safety of the fire extinguishing system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire gear pumps, in particular to an anti-jamming structure of a fire gear pump. Background Art

[0002] Foam fire extinguishing is suitable for fire extinguishing in places such as petroleum, chemical industry, ports, and substations. The foam mixture is made by mixing foam liquid and fire water in a certain proportion. The foam liquid is injected into the fire water by a gear pump, and then the fire fighting system is used to achieve foam fire extinguishing.

[0003] In the process of conveying foam liquid by gear pump, due to the replacement of foam bin and the existence of air inside the pipeline, the foam will be interrupted during the conveying process (for example, the container of foam liquid is some distance away from the gear pump, the foam liquid in the tank is used up, etc.). At this time, the two gears of the gear pump are idling. Since there is no medium, the gear pump will be in dry friction all the time, generating a lot of heat, which will cause the gear pump to heat up and be damaged, and sometimes cause the gear pump to get stuck, seriously affecting fire fighting. In view of this phenomenon, this technical solution is specially proposed for improvement. Utility Model Content

[0004] The utility model aims to overcome the disadvantage that a gear pump used for fire fighting foam in the prior art may get stuck when idling, which affects its use, and provides an anti-sticking structure for a gear pump used for fire fighting.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model specifically adopts the following technical scheme: an anti-jamming structure of a gear pump for fire fighting, including a lubricating device arranged on the pump body shell, the lubricating device including an output pipe arranged on the pump body shell, a storage tank is arranged above the pump body, a lubricating medium is arranged inside the storage tank, and a control device for controlling the release of the lubricating medium is arranged on the output pipe.

[0006] Furthermore, the control device comprises a control pipeline arranged at the outlet of the pump body, the control pipeline is communicated with the output pipe, and a one-way valve is arranged above the connection between the control pipeline and the output pipe.

[0007] Furthermore, the one-way valve is a pressure one-way valve, and the output direction of the one-way valve is toward the pump body.

[0008] Furthermore, the connection between the control pipeline and the output pipe is connected through a three-way joint, and the control pipeline is in communication with a lateral interface of the three-way joint.

[0009] Furthermore, a bypass pipe connected in parallel with the output pipe is provided on one side of the output pipe, a first valve is provided on the bypass pipe, and a second valve is provided on the output pipe.

[0010] Furthermore, the control device includes a pressure transmitter arranged on the outlet of the pump body, and the pressure transmitter is connected to an intermittent lubricating oil pump arranged on the output pipe, and the starting mode of the intermittent lubricating oil pump is pressure control.

[0011] The beneficial effects of the embodiments of the utility model are as follows: a storage tank is installed above the pump body, and an appropriate amount of lubricating medium is stored in the storage tank. The control pipeline is connected to the output pipe through a one-way valve. When the pressure at the pump body outlet drops below a set threshold, the one-way valve automatically opens to allow the lubricating medium to enter the gear pump from the storage tank through the output pipe, ensuring that the lubricating medium is released only when needed, which saves resources and improves the reliability of the system. By arranging a lubrication device and a control device, automatic lubrication and cooling functions of the gear pump in an idling state are realized, which can effectively prevent the gear pump from being damaged or stuck due to overheating, thereby improving the reliability and safety of the fire extinguishing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 Another structural schematic diagram of the utility model;

[0014] In the figure: 1, pump body; 2, control pipeline; 3, storage tank; 301, first valve; 302, second valve; 303, one-way valve; 304, output pipe; 4, bypass pipe; 5, lubricating oil pump; 501, pressure transmitter. DETAILED DESCRIPTION

[0015] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0016] Example 1

[0017] See also Figure 1 The embodiment of the utility model discloses a fire-fighting gear pump anti-jamming structure, which mainly includes a lubrication device arranged on the outer shell of the pump body 1. By automatically detecting and responding to the situation of foam liquid interruption, it ensures that the gear pump is lubricated in time when idling to prevent it from overheating, damage or jamming.

[0018] An output pipe 304 is provided on the outer shell of the pump body 1, and a storage tank 3 is installed above the pump body 1. The storage tank 3 stores a proper amount of lubricating medium, such as lubricating oil. When the foam liquid stops flowing, the lubricating medium can quickly enter the gear pump through the output pipe 304 to play a role in lubrication and cooling. In order to accurately control the release of the lubricating medium, we set a control device on the output pipe 304. The control device includes a control pipeline 2 connected to the outlet of the pump body 1. The control pipeline 2 is connected to the output pipe 304 through a one-way valve 303. When the pressure at the outlet of the pump body 1 drops below the set threshold (that is, when the foam liquid stops flowing), the one-way valve 303 automatically opens, allowing the lubricating medium to enter the gear pump from the storage tank 3 through the output pipe 304, ensuring that the lubricating medium is released only when needed, which saves resources and improves the reliability of the system.

[0019] The one-way valve 303 is designed as a pressure one-way valve 303, and its output direction is toward the pump body 1. When the foam liquid flows normally, there is a large pressure inside the control line 2, which pushes the one-way valve 303 upward and closes the one-way valve 303 to prevent the lubricating medium from entering the foam mixture. When the foam liquid stops flowing, there is no pressure inside the control line 2, and the one-way valve 303 opens, allowing the lubricating medium to enter the gear pump for lubrication, thereby improving the safety and stability of the system.

[0020] In order to more flexibly control the release of the lubricating medium, a three-way joint is provided at the connection between the control pipeline 2 and the output pipe 304. The control pipeline 2 is connected to the lateral interface of the three-way joint, so that when the control pipeline 2 forms a pressure seal on the one-way valve 303, the control pipeline 2 will form a connection between the pump body 1 and the outlet without affecting the use. When the gear pump is idling, the lubricating medium flows downward under the action of gravity and directly acts on the inside of the pump body 1 through the three-way joint to ensure the lubrication effect.

[0021] A bypass pipe 4 connected in parallel with the output pipe 304 is provided on one side of the output pipe 304. A first valve 301 is provided on the bypass pipe 4, which can be opened or closed manually when needed, so as to urgently supplement or discharge the lubricating medium under special circumstances. At the same time, a second valve 302 is provided on the upper part of the output pipe 304 near the storage tank 3 to control the supply of the lubricating medium. By adjusting the switch state of the two valves, the flexibility and reliability of the system are improved. At the same time, in order to increase controllability, the second valve 302 can use an electric valve. The switch of the second valve 302 is connected to the pump body 1. When the pump body 1 rotates, the second valve 302 is powered on and opened, thereby improving the control effect.

[0022] Example 2

[0023] See also Figure 2The main difference between this embodiment and embodiment 1 is that a pressure transmitter 501 is provided at the outlet of the pump body 1 to realize automatic control of the release of the lubricating medium. The pressure transmitter 501 monitors the pressure change at the outlet of the pump body 1 in real time and transmits the signal to the intermittent lubricating oil pump 5 provided on the output pipe 304. The lubricating oil pump 5 selects the YS / TZ series of the DALOMA brand. When the pressure at the outlet of the pump body 1 drops below the set threshold, the intermittent lubricating oil pump 5 automatically starts, pumps the lubricating medium from the tank 3 and sends it to the gear pump through the output pipe 304 for lubrication, realizing automatic control of the release of the lubricating medium and improving the intelligence level and reliability of the system. By providing a lubricating device and a control device, the automatic lubrication and cooling function of the gear pump in the idling state is realized. It can effectively prevent the gear pump from being damaged or stuck due to overheating, and improve the reliability and safety of the fire extinguishing system. At the same time, the structure also has the advantages of simple structure, convenient operation, and applicability to pumping stations, and has broad application prospects in the field of fire protection.

[0024] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0026] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0027] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A fire-fighting gear pump anti-stuck structure, characterized in that: The invention comprises a lubricating device arranged on the outer shell of a pump body (1), the lubricating device comprising an output pipe (304) arranged on the outer shell of the pump body (1), a storage tank (3) being arranged above the pump body (1), a lubricating medium being arranged inside the storage tank (3), and a control device for controlling the release of the lubricating medium being arranged on the output pipe (304).

2. The anti-stuck structure of the fire-fighting gear pump according to claim 1, characterized in that: The control device comprises a control pipeline (2) arranged at the outlet of the pump body (1), the control pipeline (2) being in communication with an output pipe (304), and a one-way valve (303) being arranged above the connection between the control pipeline (2) and the output pipe (304).

3. The anti-stuck structure of the fire-fighting gear pump according to claim 2, characterized in that: The one-way valve (303) is a pressure one-way valve (303), and the output direction of the one-way valve (303) is toward the pump body (1).

4. The anti-stuck structure of the fire-fighting gear pump according to claim 2, characterized in that: The connection between the control pipeline (2) and the output pipe (304) is connected via a three-way joint, and the control pipeline (2) is in communication with a transverse interface of the three-way joint.

5. The anti-stuck structure of the fire-fighting gear pump according to claim 1, characterized in that: A bypass pipe (4) connected in parallel with the output pipe (304) is provided on one side of the output pipe (304), a first valve (301) is provided on the bypass pipe (4), and a second valve (302) is provided on the output pipe (304).

6. The anti-stuck structure of the fire-fighting gear pump according to claim 1, characterized in that: The control device comprises a pressure transmitter (501) arranged on the outlet of the pump body (1), the pressure transmitter (501) being connected to an intermittent lubricating oil pump (5) arranged on the output pipe (304), and the starting mode of the intermittent lubricating oil pump (5) is pressure control mode.

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