CN215371154U

CN215371154U - Maintenance-free opposed piston spring type energy storage device

Info

Publication number: CN215371154U
Application number: CN202121755986.5U
Authority: CN
Inventors: 丁远龙; 张卫超; 李小帆; 徐才茂; 胡敏渊; 张申
Original assignee: Zhejiang Langsong Intelligent Power Equipment Co ltd
Current assignee: Zhejiang Langsong Intelligent Power Equipment Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-29
Publication date: 2021-12-31
Anticipated expiration: 2031-07-29
Also published as: CN113431936A

Abstract

The utility model relates to the technical field of fire fighting equipment, in particular to a maintenance-free opposed piston spring type energy storage device which comprises a tubular body and two pistons arranged in the tubular body, wherein end covers are respectively arranged at two ends of the tubular body, the two end covers are connected through a connecting rod, a spring seat is arranged on the tubular body between the piston at the same end and the end covers, a spring is arranged between the spring seat and the end covers, a sealing ring is arranged on the piston, and an air outlet and a liquid inlet and outlet are arranged in the middle of the tubular body. The maintenance-free opposed piston spring type energy storage device has the following advantages: an opposed double-piston structure is adopted, so that small volume and high energy storage volume are realized; the spring is arranged in the piston, so that the space utilization rate is improved, and the structure is compact.

Description

Maintenance-free opposed piston spring type energy storage device

Technical Field

The utility model relates to the technical field of fire fighting equipment, in particular to a maintenance-free opposed piston spring type energy storage device.

Background

The fire threatens the life and property safety of people, and when the fire happens, the life and property safety of people can be ensured to the maximum extent only by extinguishing or restraining the development of the fire at the fastest speed. The water mist fire extinguishing is applied more and more widely as a novel fire extinguishing mode which is efficient, environment-friendly and free of secondary damage. However, due to the uncertainty of fire occurrence, in order to increase the spray response speed after the fire occurs, a pressure stabilizing system is often used, i.e., the main pipeline is filled with water and kept at a certain pressure in a standby state. The pressure stabilizing section of the fire extinguishing system is a pump unit and is arranged in front of each zone control valve, and the pressure stabilizing pressure is generally between 0.5 and 1.2 MPa. Because the compression ratio of water is very low, and pressure regulating relief valve, relief valve all adopt metal hard seal in the system, reveal in the inevitable. The pressure stabilizing pump is frequently started only by the pressure stabilization of the pipeline cavity under the influence of later-stage soft seal aging leakage and field temperature alternation, the single operation time of the pressure stabilizing pump is short (quick start and quick stop), and the pressure stabilizing pump and the motor which are operated for a long time are easy to damage.

It is contemplated that an energy storage device may be used in the system to reduce the operating frequency of the pressure maintenance pump. However, the existing energy storage devices, such as a bladder inflatable energy storage device, a gravity type energy storage device, etc., are available. The leather bag inflatable energy accumulator needs to be inflated periodically for maintenance, and is inconvenient to use. The gravity type energy accumulator has large volume and heavy weight, and is not suitable for being applied to the fire fighting system.

Therefore, it is necessary to develop a maintenance-free energy storage device with small volume.

SUMMERY OF THE UTILITY MODEL

The utility model provides a maintenance-free opposed piston spring type energy storage device, which is compact in structure, utilizes a spring to store energy and is maintenance-free.

The utility model discloses a maintenance-free opposed piston spring type energy storage device, which comprises a tubular body and two pistons arranged in the tubular body, wherein end covers are respectively arranged at two ends of the tubular body, the two end covers are connected through at least two connecting rods, a spring seat is arranged on the tubular body between the piston at the same end and the end covers, one or more springs are arranged between the spring seat and the end covers, a sealing ring is arranged on the outer circumference of the piston and is used for sealing between the piston and the tubular body, and an air outlet and a liquid inlet and outlet are arranged in the middle of the tubular body.

In the above scheme, through the piston at tubulose body and both ends, and set up end cover and spring in the piston outside, utilize the spring to provide pressure for the piston. When the fire extinguishing agent is filled into the tubular body between the two pistons to the upper pressure limit, the pistons and the springs are compressed to store certain energy, when the pressure of the fire extinguishing agent in a system pipeline is reduced, the fire extinguishing agent in the tubular body can be supplemented into the system pipeline through the liquid inlet and outlet, and the two pistons move close to each other under the action of the springs, so that the space in the tubular body between the pistons is relatively reduced, and the pressure of the fire extinguishing agent in the system pipeline is kept stable basically. And when the pressure given to the piston by the spring and the pressure of the fire extinguishing agent in the system pipeline are reduced to the lower limit, the pressure stabilizing pump is started again to supplement the fire extinguishing agent to the system pipeline and the interior of the tubular body, the spring is compressed again to store energy, and the process is repeated. The time that the pressure of the fire extinguishing agent in the system pipeline is maintained within the required value range can be effectively prolonged in the process, so that the starting frequency of the pressure stabilizing pump can be reduced, the starting interval time of the pressure stabilizing pump is increased, the starting interval time of the pressure stabilizing pump can be generally prolonged to be more than 5 times of the existing time interval, and the running stability and reliability of equipment are ensured.

An inner concave cavity is formed in the end face, close to one side of the end cover, of the piston, and the spring seat is arranged inside the inner concave cavity. The design of this structure can effectively increase the area that sets up of sealing ring, makes complex structures such as piston, spring holder, spring compacter moreover to make whole energy storage equipment's volume reduce, whole weight can reduce moreover.

The end covers on two sides are connected with the tubular body through a long connecting rod and a nut, threads are arranged at two ends of the connecting rod, and a flange is designed on one side, close to the piston, of each end cover, so that the purposes of centering the position and increasing the strength of parts are achieved.

Counter bores are formed in the spring seat, the number of the counter bores is the same as that of the springs on the same side, the end portions of the springs are arranged in the counter bores, and when the number of the springs is larger than 1, the counter bores are uniformly distributed on the spring seat by taking the axis of the spring seat as the center; a spring guide sleeve is arranged in the tubular body between the spring seat and the end cover on the same side, and guide holes corresponding to the number and positions of the springs are formed in the spring guide sleeve. A plurality of counter bores are uniformly distributed on the spring seat by taking the axis of the spring seat as the center so as to install springs, and the number of the springs is calculated and matched according to the diameter of the piston and the pressure range. The spring guide sleeve is made of plastic or high polymer materials with low friction coefficient, abrasion to the outer diameter of the spring is reduced, the number of guide holes of the spring guide sleeve and the reference circle of the guide holes are consistent with those of counter bores in the spring seat, and a guide angle which is 10-30 degrees to the axial direction of each guide hole is designed at an opening part of one end, facing the spring seat, of each guide hole.

And the spring guide sleeve is fixedly connected with the end cover at the same side through a bolt.

The piston is of a hollow structure with one open end, the open end of the piston faces the spring seat, and the spring seat is located inside the hollow structure of the piston. The center of the end face of the piston, which is in contact with the spring seat, is provided with a conical surface concave structure, the center of the end face of the spring seat, which corresponds to the conical surface concave structure, is provided with a spherical surface convex structure, and the spherical surface convex structure is matched and abutted with the conical surface concave structure. The spring seat and the piston are matched by adopting a spherical surface and a conical surface so as to achieve the purpose of small-angle swing compensation, avoid the influence of the overturning moment generated by the difference of the free length and the rigidity of a single spring on the piston, reduce the load and the friction force of a piston guide ring, and simultaneously avoid the spring distortion and even overturn caused by the circumferential rotation of the piston in the telescopic stroke.

A guide ring is provided on a circumferential surface of the piston. The piston is provided with a guide ring and a sealing ring, the guide ring is made of plastic or high molecular material with low friction coefficient, and the compensation type sealing ring is adopted, namely the piston comprises an elastic compensation element and a contact sealing element.

The maintenance-free opposed piston spring type energy storage device and the water mist fire extinguishing system have the following advantages:

an opposed double-piston structure is adopted, so that the small volume and high energy storage volume are realized, and the processing difficulty is small when the body is a tubular structure;

the spring is arranged in the piston and matched with the piston excircle sealing and guiding structure, so that the space utilization rate is improved, and the structure is compact;

the spring seat and the piston are matched by adopting a spherical surface and a conical surface, so that the overturning moment generated by small-angle deflection of the spring seat on the piston due to the difference of free lengths and rigidity coefficients of a plurality of springs is avoided, and the load and the friction force of the guide ring are smaller;

the spring guide sleeve is made of low-friction-coefficient plastic, so that the abrasion of the outer circle of the spring is reduced, the scraping noise of the spring is eliminated, and meanwhile, the maximum stroke of the piston is limited by the spring guide sleeve to play a role of a buffer.

Drawings

FIG. 1 is a schematic diagram of a prior art fire suppression system;

FIG. 2 is a schematic view of an energy storage device of the present invention in use in a fire suppression system;

FIG. 3 is a schematic cross-sectional view of an energy storage apparatus according to the present invention;

FIG. 4 is a schematic partial cross-sectional view of an energy storage apparatus according to the present invention;

fig. 5 is an exploded view of the energy storage device of the present invention.

Detailed Description

To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

Example 1:

as shown in fig. 3, 4 and 5, the utility model discloses a maintenance-free opposed piston spring type energy storage device, which comprises a tubular body 1 and two pistons 2 arranged in the tubular body 1, wherein end covers 6 are respectively arranged at two ends of the tubular body 1, the two end covers 6 are connected through four connecting rods 13, a spring seat 3 is arranged on the tubular body 1 between the piston 2 and the end cover 6 at the same end, an inner concave cavity is arranged on the end surface of the piston 2 close to one side of the end cover 6, the spring seat 3 is arranged in the inner concave cavity, three springs 5 are arranged between the spring seat 3 and the end cover 6, a sealing ring 7 is arranged on the outer circumference of the piston 2, the sealing ring 7 is used for realizing the sealing between the piston 2 and the tubular body 1, and an exhaust port 9 and a liquid inlet/outlet 10 are arranged in the middle part of the tubular body 1. Of course, the exhaust port 9 needs to be closed with a sealing cover after the exhaust is completed. The end covers 6 on two sides are connected with the tubular body 1 through a long connecting rod 13 and a nut 12, and threads are arranged at two ends of the connecting rod 13.

Counter bores 14 are formed in the spring seat 3, the number of the counter bores 14 is the same as that of the springs 5 on the same side, the end portions of the springs 5 are arranged in the counter bores 14, and when the number of the springs 5 is 3, the counter bores 14 are uniformly distributed on the spring seat 3 by taking the axis of the spring seat 3 as the center; a spring guide sleeve 4 is arranged inside the tubular body 1 between the spring seat 3 and the end cover 6 on the same side, and guide holes 15 corresponding to the number and positions of the springs 5 are formed in the spring guide sleeve 4.

The spring guide sleeve 4 is fixedly connected with the end cover 6 on the same side through a bolt 11.

The piston 2 is a hollow structure with an open end, the open end faces the spring seat 3, and the spring seat 3 is located inside the hollow structure of the piston 2. The center of the end face of the piston 2, which is in contact with the spring seat 3, is provided with a conical surface concave structure, the center of the end face of the spring seat 3, which corresponds to the conical surface concave structure, is provided with a spherical surface convex structure, and the spherical surface convex structure is matched and abutted with the conical surface concave structure.

A guide ring 8 is provided on the circumferential surface of the piston 2.

Example 2:

the utility model discloses an application of an energy storage device in embodiment 1 in a water mist fire extinguishing system, as shown in figure 2, the system comprises a water tank h, a fire pump a and a pressure stabilizing pump b are connected in parallel at the bottom of the water tank h through a pipeline, a first one-way valve c is arranged at the output end of the fire pump a, a second one-way valve d is arranged at the output end of the pressure stabilizing pump b, the first one-way valve c and the second one-way valve d are connected to a fire extinguishing agent delivery main pipe after being converged through a pipeline, a plurality of fire extinguishing agent delivery branch pipes are connected in parallel on the fire extinguishing agent delivery main pipe, a partition control valve i is arranged on each fire extinguishing agent delivery branch pipe, a water mist spray nozzle j is arranged on each fire extinguishing agent delivery branch pipe, a third one-way valve n is arranged between the second one-way valve d and the fire extinguishing agent delivery main pipe, an energy storage device k is arranged on the pipeline between the second one-way valve d and the third one-way valve n, a pressure regulating valve e is connected between the fire extinguishing agent delivery main pipe and the water tank h through a pipeline, a safety valve f is connected between the main fire extinguishing agent conveying pipe and the water tank h through a pipeline.

The fire extinguishing agent delivery main pipe is provided with a pressure gauge g.

Although the present invention has been described with reference to the preferred embodiments, it is to be understood that the utility model is not limited to the disclosed embodiments, but may be embodied or carried out in various forms without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a non-maintaining opposition piston spring formula energy storage device which characterized by: the sealing device comprises a tubular body and two pistons arranged in the tubular body, wherein end covers are respectively arranged at two ends of the tubular body, the two end covers are connected through at least two connecting rods, a spring seat is arranged on the tubular body between the piston at the same end and the end covers, one or more springs are arranged between the spring seat and the end covers, a sealing ring is arranged on the outer circumference of the piston and used for sealing between the piston and the tubular body, and an air outlet and a liquid inlet and outlet are formed in the middle of the tubular body.

2. A maintenance-free, opposed-piston spring energy storage apparatus as claimed in claim 1, wherein: an inner concave cavity is formed in the end face, close to one side of the end cover, of the piston, and the spring seat is arranged inside the inner concave cavity.

3. A maintenance-free, opposed piston spring, energy storage apparatus as claimed in claim 1 or claim 2, wherein: counter bores are formed in the spring seat, the number of the counter bores is the same as that of the springs on the same side, the end portions of the springs are arranged in the counter bores, and when the number of the springs is larger than 1, the counter bores are uniformly distributed on the spring seat by taking the axis of the spring seat as the center; a spring guide sleeve is arranged in the tubular body between the spring seat and the end cover on the same side, and guide holes corresponding to the number and positions of the springs are formed in the spring guide sleeve.

4. A maintenance-free, opposed-piston spring energy storage apparatus as claimed in claim 3, wherein: and the spring guide sleeve is fixedly connected with the end cover at the same side through a bolt.

5. A maintenance-free, opposed-piston spring energy storage apparatus as claimed in claim 3, wherein: the center of the end face of the piston, which is in contact with the spring seat, is provided with a conical surface concave structure, the center of the end face of the spring seat, which corresponds to the conical surface concave structure, is provided with a spherical surface convex structure, and the spherical surface convex structure is matched and abutted with the conical surface concave structure.

6. A maintenance-free, opposed-piston spring energy storage apparatus as claimed in claim 5, wherein: a guide ring is provided on a circumferential surface of the piston.