A lifting damper for a pressure-type foam proportioning device

Abstract

A lifting damper for a pressure-type foam proportioning device is disclosed. The elastic damper is installed in the inlet pipe of the pressure-type foam proportioning device and includes an inlet sleeve embedded in the inner wall of the inlet pipe and a water-blocking element disposed in the inlet sleeve. The water-blocking element has a water passage hole. A travel sleeve passes through the top wall of the inlet sleeve, and a sealing element is slidably disposed in the travel sleeve. The bottom of the sealing element seals the water passage hole. When the water pressure in the inlet pipe gradually increases, the sealing element rises under the pressure of the water, and the water passage hole opens. This invention, through the lifting damper, ensures that the injection pressure of the foam liquid is higher than the water pressure at the low-pressure end of the proportioning mixer, thereby guaranteeing the normal supply of foam liquid.

Description

Technical Field

[0001] This invention relates to the field of fire extinguishing equipment technology, and in particular to a lifting damper for a pressure foam proportioning device. Background Technology

[0002] Currently, existing pressure-type foam proportioning devices mainly consist of a foam concentrate pressure storage tank with a bladder and a PHY-type pressure proportioner based on the Venturi principle. When water in the system pipeline flows through the pressure-reducing orifice plate of the proportioner, a pressure difference is created before and after the orifice plate. A portion of the water (3% or 6%) from the higher pressure area enters the foam tank through the inlet pipe, compressing the bladder and forcing the foam concentrate inside through the outlet pipe of the foam tank to the lower pressure area of ​​the proportioner to mix with water and form a foam mixture. The resulting foam mixture is then output to foam generating equipment (medium, low, and high expansion foam generators, foam guns, foam cannons, etc.) to mix with air to produce foam for fire extinguishing. In existing pressure-type foam proportioning devices, because the injection pressure of the foam concentrate is not higher than the water pressure at the lower pressure area of ​​the proportioner, the foam concentrate may not be supplied normally during fire extinguishing, thus affecting the fire extinguishing effect. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a lifting damper for a pressure-type foam proportioning device to ensure the normal supply of foam liquid.

[0004] A lifting damper for a pressure foam proportioning device, wherein the elastic damper is installed in the water inlet pipe of the pressure foam proportioning device, and includes a water inlet sleeve embedded in the inner wall of the water inlet pipe, and a water-blocking element disposed in the water inlet sleeve.

[0005] The water-blocking element is provided with a water passage hole, and a travel sleeve is provided on the top wall of the water inlet sleeve. A sealing element is slidably provided in the travel sleeve. The bottom of the sealing element seals the water passage hole. When the water pressure in the water inlet pipe gradually increases, the sealing element rises under the push of the water pressure, and the water passage hole opens.

[0006] Compared with the prior art, the present invention uses a lifting damper to make the injection pressure of the foam liquid higher than the water pressure at the low pressure point of the proportioning mixer, thereby ensuring the normal supply of foam liquid.

[0007] Furthermore, the sealing element has a T-shaped structure, including a sliding rod and a sealing end connected to each other;

[0008] The bottom of the sealing end is provided with a water inlet pressure ring, which seals the water passage hole;

[0009] The sliding rod is located in the travel sleeve.

[0010] Furthermore, a sealing ring is fitted on the outer wall of the water inlet pressure ring.

[0011] Furthermore, the weight of the sealing element is 0.5KG-0.8KG.

[0012] Furthermore, an elastic element is sleeved on the sliding rod, and the elastic element is engaged between the bottom of the travel sleeve and the top of the sealing end.

[0013] Furthermore, the elastic element is a spring or a sheet spring.

[0014] Furthermore, the sliding rod and the travel sleeve slide hydraulically.

[0015] Furthermore, the water-blocking element is a horizontally arranged Z-shaped structure, including a horizontally arranged first baffle and second baffles respectively disposed at both ends of the first baffle, and the water passage hole is located on the first baffle;

[0016] One end of the second baffle is connected to the inner wall of the water inlet sleeve, and the other end is connected to the end of the first baffle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the pressure-type foam proportioning device in this invention;

[0018] Figure 2 for Figure 1 A schematic diagram of a lifting damper used in a pressure-type foam proportioning device.

[0019] Figure 3 When the weight of the sealing element is 0.576KG, the mixing ratio of the lifting damper under different working pressures or flow rates;

[0020] Figure 4 When the weight of the sealing element is 1.133KG, the mixing ratio of the lifting damper under different working pressures or flow rates;

[0021] Figure 5 The mixing ratio of the lifting damper under different working pressures or flow rates when the weight of the sealing element is 2.285KG.

[0022] Explanation of key component symbols:

[0023]

[0024]

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0026] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figure 1 and Figure 2 An embodiment of the present invention provides a lifting damper for a pressure foam proportioning mixing device. The elastic damper is installed in the water inlet pipe of the pressure foam proportioning mixing device and includes a water inlet sleeve 10 embedded in the inner wall of the water inlet pipe and a water-blocking element 11 disposed in the water inlet sleeve 10.

[0030] The water-blocking element 11 is provided with a water passage hole 111. A travel sleeve 12 is provided on the top wall of the water inlet sleeve 10. A sealing element 13 is slidably provided in the travel sleeve 12. The bottom of the sealing element 13 seals the water passage hole 111. When the water pressure in the water inlet pipe gradually increases, the sealing element 13 rises under the push of the water pressure, and the water passage hole 111 opens.

[0031] It should be noted that the water inlet speed is slowed down by using a lifting damper, which reduces the inlet water pressure, so that the injection pressure of the foam liquid is higher than the water pressure at the low pressure point of the proportioning mixer, thereby ensuring the normal supply of foam liquid. Furthermore, in the initial state, when no water is flowing through, the sealing element 13 covers the water passage 111 under its own gravity, achieving a sealing effect.

[0032] Please see Figure 2 The sealing element 13 has a T-shaped structure, including a sliding rod 131 and a sealing end 132 connected to each other;

[0033] The bottom of the sealing end 132 is provided with a water inlet pressure ring 133, which seals the water passage hole 111;

[0034] The sliding rod 131 is located in the travel sleeve 12 so that the sealing element 13 can slide upward under water pressure and slide downward under its own weight.

[0035] In a preferred embodiment of the present invention, a sealing ring is fitted on the outer wall of the water inlet pressure ring 133 to enhance the sealing effect.

[0036] In another preferred embodiment of the present invention, the weight of the sealing element 13 (i.e., the valve disc) is 0.5KG-0.8KG. It should be noted that when the weight of the sealing element 13 is less than 0.5KG, it is easily opened by water pressure, failing to achieve a sealing effect; when the weight of the sealing element 13 is greater than 0.8KG, it is not easily opened by water pressure, making it difficult to open the water passage 111.

[0037] Specifically, experiments were conducted using valve discs weighing 0.576 kg, 1.133 kg, and 2.285 kg respectively, to expand the flow range of the pressure type to 10.8-115.2 M. 3 / H, working pressure 0.3-1.2MAP.

[0038] Table 1 shows that the valve disc weighs 0.576 kg.

[0039] Work pressure Total flow foam liquid flow rate Mixing ratio 0.3 9.8 0.4 4.08％ 0.3 28.3 1.01 3.57％ 0.3 43.3 1.57 3.63％ 0.3 78.7 2.9 3.68％ 0.3 109.8 4.06 3.70％ 0.8 10.2 0.38 3.73％ 0.8 92.4 3.42 3.70％ 0.8 98.4 3.63 3.69％ 0.8 114.3 4.02 3.52％ 1.2 15.7 0.59 3.76％ 1.2 62.5 2.3 3.68％ 1.2 116.4 4.13 3.55％

[0040] Table 2 shows the valve disc weight as 1.133 kg.

[0041]

[0042]

[0043] Table 3 shows that the valve disc weighs 2.285 kg.

[0044] Work pressure Total flow foam liquid flow rate Mixing ratio 0.3 10.3 0.61 5.92％ 0.3 16.7 0.83 4.97％ 0.3 22.3 1.08 4.84％ 0.3 32.6 1.53 4.69％ 0.3 48.8 2.26 4.63％ 0.3 72.8 3.22 4.42％ 0.3 101.3 4.84 4.78％ 0.3 116 4.85 4.18％ 0.3 135.5 5.63 4.15％ 0.8 9.6 0.55 5.73％ 0.8 16.8 0.87 5.18％ 0.8 25.4 1.1 4.33％ 0.8 34.9 1.38 3.95％ 0.8 82 3.15 3.84％ 0.8 97.6 3.74 3.83％ 1.2 10.7 0.58 5.42％ 1.2 21.5 0.9 4.19％ 1.2 27.7 1.26 4.55％ 1.2 61 2.87 4.70％ 1.2 99.1 4.6 4.64％ 1.2 116.5 5.03 4.32％

[0045] Please see Figures 3 to 5 Based on the data analysis and in conjunction with Tables 1 to 3, it can be concluded that valve discs of different weights exert different resistances on water flow. Through experiments with valve discs of different weights, the data comparison and calculation show that valve discs weighing 0.5-0.8KG can meet the requirements of this application.

[0046] In a preferred embodiment of the present invention, an elastic element is sleeved on the sliding rod 131, and the elastic element is engaged between the bottom of the travel sleeve 12 and the top of the sealing end 132. It should be noted that when the elastic element is provided, the weight of the sealing element 13 can be relatively reduced. The sealing effect is achieved by the combination of the weight of the sealing element 13, the weight of the elastic element, and the elastic force of the elastic element itself.

[0047] Preferably, the elastic element is a spring or a sheet spring.

[0048] In a preferred embodiment of the present invention, the sliding rod 131 and the travel sleeve 12 slide hydraulically. This reduces the weight of the sealing element 13, and the sealing effect is achieved through the combination of the weight of the sealing element 13 and the hydraulic pressure.

[0049] Please see Figure 2 The water-blocking element 11 is a horizontally arranged Z-shaped structure to facilitate welding, including a horizontally arranged first baffle 112 and second baffles 113 respectively provided at both ends of the first baffle 112, and the water passage hole 111 is located on the first baffle 112.

[0050] One end of the second baffle 113 is connected to the inner wall of the water inlet sleeve 10, and the other end is connected to the end of the first baffle 112.

[0051] It should be further noted that in this invention, the foam liquid can be filled using an injection pump or manually. Before filling, the drain valve, capsule, and tank shell vent valve should be opened to drain the residual liquid in the capsule and the water in the tank shell.

[0052] When manually filling:

[0053] Open the liquid filling valve and the water drain valve in sequence to fill the space between the storage tank and the capsule with water. The water volume should be 1 / 4 of the device. When filling with water, the valve should be opened slowly. After filling with water, close the water drain valve.

[0054] Slowly fill the tank with foam liquid through the filling port. When the foam liquid reaches 3 / 4 full, open the drain valve to drain the water from the tank and the capsule interlayer. When the foam liquid overflows from the capsule vent, close the capsule vent valve, the tank shell vent valve, the filling valve, and the drain valve.

[0055] When using a filling pump:

[0056] First, connect the outlet pipe of the injection pump to the injection port of the pump, and insert the end of the suction pipe of the injection pump into the bottom of the foam cylinder;

[0057] Open the drain valve and fill the space between the storage tank and the capsule with water. The water volume should be 1 / 4 of the device. When filling with water, the valve should be opened slowly. After filling with water, close the drain valve.

[0058] Open the pump injection valve, start the injection pump, and fill the tank with foam liquid. Observe the liquid level gauge carefully. When the foam liquid reaches 3 / 4, open the drain valve to drain the water in the storage tank and capsule interlayer. When the foam liquid overflows from the capsule vent, first turn off the injection pump, and then close all other valves.

[0059] In summary, this invention uses a lifting damper to ensure that the injection pressure of the foam liquid is higher than the water pressure at the low pressure point of the proportioning mixer, thereby guaranteeing the normal supply of foam liquid.

[0060] In this specification, the various embodiments are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Furthermore, the above-described embodiments merely illustrate several implementation methods of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A lifting damper for a pressure-type foam proportioning device, characterized in that: The lifting damper is installed in the water inlet pipe of the pressure foam proportioning mixing device, including a water inlet sleeve embedded in the inner wall of the water inlet pipe, and a water-blocking element provided in the water inlet sleeve. The water-blocking element is provided with a water passage hole, and a travel sleeve is provided on the top wall of the water inlet sleeve. A sealing element is slidably provided in the travel sleeve. The bottom of the sealing element seals the water passage hole. When the water pressure in the water inlet pipe gradually increases, the sealing element rises under the push of the water pressure, and the water passage hole opens. The weight of the sealing element is 0.5KG-0.8KG; The sealing element is a T-shaped structure, including a sliding rod and a sealing end connected together. The bottom of the sealing end is provided with a water inlet pressure ring, which seals the water passage hole. The sliding rod is located in the travel sleeve. An elastic element is sleeved on the sliding rod, and the elastic element is locked between the bottom of the travel sleeve and the top of the sealing end. The sliding rod and the travel sleeve slide hydraulically. The water-blocking element is a horizontally arranged Z-shaped structure, including a horizontally arranged first baffle and second baffles respectively located at both ends of the first baffle. The water passage hole is located on the first baffle. One end of the second baffle is connected to the inner wall of the water inlet sleeve, and the other end is connected to the end of the first baffle.

2. The lifting damper for a pressure-type foam proportioning device according to claim 1, characterized in that, A sealing ring is fitted on the outer wall of the water inlet pressure ring.

3. The lifting damper for a pressure-type foam proportioning device according to claim 1, characterized in that, The elastic element is a spring or a sheet.

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