阅读说明：本技术 一种用于压力式泡沫比例混合装置的升降式阻尼器 (Lifting damper for pressure type foam proportion mixing device ) 是由 涂建新 胡强 万文成 于 2021-10-25 设计创作，主要内容包括：一种用于压力式泡沫比例混合装置的升降式阻尼器,所述弹性阻尼器安装于压力式泡沫比例混合装置的进水管中,包括嵌设有进水管内壁上的进水套管,以及设于所述进水套管中的挡水元件；所述挡水元件中设有过水孔,所述进水套管的顶壁上穿设有行程套管,所述行程套管中滑动设有封堵元件,所述封堵元件的底部将所述过水孔密封,当进水管中的水压逐渐增大时,所述封堵元件在水压推动下进行上升,所述过水孔开启。本发明通过升降式阻尼器,使得泡沫液的注入压力高于比例混合器低压处的水压,从而保证泡沫液的正常供给。(A lifting damper for a pressure type foam proportion mixing device is characterized in that an elastic damper is arranged in a water inlet pipe of the pressure type foam proportion mixing device and comprises a water inlet sleeve embedded on the inner wall of the water inlet pipe and a water retaining element arranged in the water inlet sleeve; the water inlet pipe is characterized in that a water passing hole is formed in the water retaining element, a stroke sleeve penetrates through the top wall of the water inlet sleeve, a plugging element is arranged in the stroke sleeve in a sliding mode, the water passing hole is sealed by the bottom of the plugging element, when the water pressure in the water inlet pipe is gradually increased, the plugging element rises under the pushing of the water pressure, and the water passing hole is opened. The invention ensures that the injection pressure of the foam liquid is higher than the water pressure at the low pressure of the proportioner through the lifting damper, thereby ensuring the normal supply of the foam liquid.)

1. A lifting damper for a pressure type foam proportion mixing device is characterized in that: the elastic damper is arranged in a water inlet pipe of the pressure type foam proportion mixing device and comprises a water inlet sleeve embedded on the inner wall of the water inlet pipe and a water retaining element arranged in the water inlet sleeve;

the water inlet pipe is characterized in that a water passing hole is formed in the water retaining element, a stroke sleeve penetrates through the top wall of the water inlet sleeve, a plugging element is arranged in the stroke sleeve in a sliding mode, the water passing hole is sealed by the bottom of the plugging element, when the water pressure in the water inlet pipe is gradually increased, the plugging element rises under the pushing of the water pressure, and the water passing hole is opened.

2. The elevating damper for a pressurized foam proportioning device of claim 1 wherein the blocking element is a T-shaped structure including a connecting sliding rod and a blocking end;

the bottom of the plugging end is provided with a water inlet pressure ring, and the water inlet pressure ring seals the water through hole;

the slide rod is located in the travel sleeve.

3. The elevating damper for a pressure type foam proportioning device of claim 2, wherein a sealing ring is sleeved on an outer wall of the water inlet pressure ring.

4. The elevating damper for a pressure-type foam proportioning device of claim 2, wherein the weight of the blocking element is 0.5KG-0.8 KG.

5. The elevating damper for a pressure type foam proportioning device of claim 2, wherein the sliding rod is sleeved with an elastic element, and the elastic element is clamped between the bottom of the stroke sleeve and the top of the blocking end.

6. The elevating damper for a pressure type foam proportioning device of claim 5, wherein the elastic member is a spring or a leaf spring.

7. The elevating damper for a pressure type foam proportioning device of claim 2, wherein the sliding rod and the stroke sleeve are hydraulically slid.

8. The elevating damper for a pressure type foam proportioning device of any one of claims 1 to 7, wherein the water blocking member is of a horizontally disposed zigzag structure comprising a first horizontally disposed baffle plate and second baffle plates disposed at both ends of the first baffle plate, respectively, and the water passing holes are located on the first baffle plate;

one end of the second baffle is connected with the inner wall of the water inlet sleeve, and the other end of the second baffle is connected with the end part of the first baffle.

Technical Field

The invention relates to the technical field of fire extinguishing equipment, in particular to a lifting damper for a pressure type foam proportion mixing device.

Background

At present, the existing pressure type foam proportional mixing device mainly comprises a foam liquid pressure storage tank with a capsule and a PHY type pressure type proportional mixer made by a Venturi principle, and when water in a system pipe network flows through a pressure reducing pore plate of the proportional mixer, a pressure difference is formed in front of and behind the pore plate. And part of water (3 percent or 6 percent) at the high pressure position enters the foam tank through a water inlet pipe of the foam tank, the capsule is extruded, foam liquid in the capsule is extruded to the low pressure position of the proportioning mixer through a liquid outlet pipe of the foam tank to be mixed with water to form foam mixed liquid, and the formed foam mixed liquid is output to foam generating equipment (a medium-low high-multiple foam generator, a foam gun, a foam cannon and the like) to be mixed with air to generate foam for extinguishing. In the existing pressure type foam proportional mixing device, because the injection pressure of foam liquid is not higher than the water pressure at the low pressure part of the proportional mixer, the foam liquid can not be normally supplied sometimes in the process of fire extinguishing, thereby affecting the fire extinguishing effect.

Disclosure of Invention

Based on this, the invention aims to provide a lifting damper for a pressure type foam proportion mixing device, so as to ensure the normal supply of foam liquid.

A lifting damper for a pressure type foam proportion mixing device is characterized in that an elastic damper is arranged in a water inlet pipe of the pressure type foam proportion mixing device and comprises a water inlet sleeve embedded on the inner wall of the water inlet pipe and a water retaining element arranged in the water inlet sleeve;

the water inlet pipe is characterized in that a water passing hole is formed in the water retaining element, a stroke sleeve penetrates through the top wall of the water inlet sleeve, a plugging element is arranged in the stroke sleeve in a sliding mode, the water passing hole is sealed by the bottom of the plugging element, when the water pressure in the water inlet pipe is gradually increased, the plugging element rises under the pushing of the water pressure, and the water passing hole is opened.

Compared with the prior art, the foam liquid injection device ensures that the injection pressure of the foam liquid is higher than the water pressure at the low pressure of the proportioning mixer through the lifting damper, thereby ensuring the normal supply of the foam liquid.

Furthermore, the plugging element is of a T-shaped structure and comprises a sliding rod and a plugging end which are connected;

the bottom of the plugging end is provided with a water inlet pressure ring, and the water inlet pressure ring seals the water through hole;

the slide rod is located in the travel sleeve.

Further, the outer wall of the water inlet pressure ring is sleeved with a sealing ring.

Further, the weight of the plugging element is 0.5KG-0.8 KG.

Furthermore, an elastic element is sleeved on the sliding rod and clamped between the bottom of the stroke sleeve and the top of the blocking end.

Further, the elastic element is a spring or a spring sheet.

Further, hydraulic sliding is adopted between the sliding rod and the stroke sleeve.

Furthermore, the water retaining element is of a transversely arranged Z-shaped structure and comprises a first baffle plate and second baffle plates, the first baffle plate is transversely arranged, the second baffle plates are respectively arranged at two ends of the first baffle plate, and the water passing holes are positioned on the first baffle plate;

one end of the second baffle is connected with the inner wall of the water inlet sleeve, and the other end of the second baffle is connected with the end part of the first baffle.

Drawings

FIG. 1 is a schematic structural diagram of a pressure type foam proportioning device according to the present invention;

FIG. 2 is a schematic view of the elevating damper for the pressure type foam proportioning device of FIG. 1;

FIG. 3 shows the mixing ratio of the lifting damper at different working pressures or flow rates for a weight of the plugging element of 0.576 KG;

FIG. 4 shows the mixing ratio of the lifting damper at different working pressures or flow rates when the weight of the plugging element is 1.133 KG;

fig. 5 shows the mixing ratio of the lifting damper at different operating pressures or flow rates for a weight of 2.285KG for the blocking element.

Description of the main element symbols:

the following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, 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 belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, in an embodiment of the present invention, an elevating damper for a pressure type foam proportion mixing device is provided, wherein the elastic damper is installed in a water inlet pipe of the pressure type foam proportion mixing device, and includes a water inlet sleeve 10 embedded on an inner wall of the water inlet pipe, and a water blocking element 11 installed in the water inlet sleeve 10;

the water blocking element 11 is internally provided with a water through hole 111, the top wall of the water inlet sleeve 10 is provided with a stroke sleeve 12 in a penetrating manner, the stroke sleeve 12 is internally provided with a blocking element 13 in a sliding manner, the bottom of the blocking element 13 seals the water through hole 111, when the water pressure in the water inlet pipe is gradually increased, the blocking element 13 is pushed by the water pressure to rise, and the water through hole 111 is opened.

It should be noted that the water inlet speed is slowed down through the lifting damper, that is, the water inlet pressure is reduced, so that the injection pressure of the foam liquid is higher than the water pressure at the low pressure of the proportioning mixer, and the normal supply of the foam liquid is ensured. And in the initial state, i.e. when no water passes through, the blocking element 13 covers the water through hole 111 under the action of its own weight to achieve the sealing effect.

Referring to fig. 2, the blocking element 13 is a T-shaped structure, and includes a sliding rod 131 and a blocking end 132 connected to each other;

the bottom of the plugging end 132 is provided with a water inlet pressure ring 133, and the water inlet pressure ring 133 seals the water through hole 111;

the sliding rod 131 is located in the travel sleeve 12 so that the blocking element 13 slides upwards under the action of the water pressure and the blocking element 13 slides downwards under its own weight.

In a preferred embodiment of the present invention, a sealing ring is sleeved on an outer wall of the water inlet pressure ring 133, and the sealing effect is enhanced by the sealing ring.

In a further preferred embodiment of the invention, the weight of the closure element 13 (i.e. the valve flap) is from 0.5KG to 0.8 KG. It should be noted that, when the weight of the plugging element 13 is less than 0.5KG, the plugging element is easily pushed away by water pressure, and the sealing effect cannot be achieved; when the weight of the blocking element 13 is more than 0.8KG, the blocking element is not easily pushed open by water pressure, and the water through hole 111 is difficult to open.

Specifically, the valve clack with the weight of 0.576KG, 1.133KG and 2.285KG is adopted for experiments, and the pressure type flow range is expanded to 10.8-115.2M³H, working pressure 0.3-1.2 MAP.

TABLE 1 flap weight of 0.576KG

Operating pressure	Total flow rate	Flow rate of foam liquid	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％

TABLE 2 flap weight 1.133KG

TABLE 3 flap weight 2.285KG

Operating pressure	Total flow rate	Flow rate of foam liquid	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％

Referring to fig. 3 to 5, and tables 1 to 3, according to data analysis, it can be obtained that the valve flaps with different weights have different resistances to water flow, and by comparing and calculating data obtained by performing tests on the valve flaps with different weights, the valve flaps with 0.5 to 0.8KG can meet the requirements of the present application.

In a preferred embodiment of the present invention, the sliding rod 131 is sleeved with an elastic element, and the elastic element is clamped between the bottom of the stroke sleeve 12 and the top of the blocking end 132. It should be noted that, when the elastic element is provided, the weight of the blocking element 13 can be relatively reduced, and the sealing effect is achieved by combining the weight of the blocking element 13, the weight of the elastic element, and the self elastic force of the elastic element.

Preferably, the elastic element is a spring or a spring sheet.

In a preferred embodiment of the present invention, the sliding rod 131 and the stroke sleeve 12 are hydraulically slid. In this case, the weight of the blocking element 13 can be reduced relatively, and the sealing effect is achieved by the combination of the weight of the blocking element 13 and the hydraulic pressure.

Referring to fig. 2, the water blocking element 11 is a horizontally disposed zigzag structure for facilitating welding, and includes a first baffle 112 disposed horizontally and second baffles 113 disposed at two ends of the first baffle 112, respectively, and the water through holes 111 are located on the first baffle 112;

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.

It should be further noted that, in the present invention, the foam liquid can be filled by a liquid injection pump or manually, and before filling, the liquid discharge valve, the capsule and the exhaust valve of the tank shell should be opened to discharge the residual liquid in the capsule and the water in the tank shell.

When manual filling is performed:

opening the liquid feeding valve and the water discharging valve in sequence, filling water into the interlayer of the storage tank and the capsule, wherein the water filling amount is 1/4 of the device, the valve is opened slowly during water filling, and the water discharging valve is closed after water filling is finished;

and slowly filling the foam liquid into the tank from the liquid filling port, opening the drain valve to drain the water in the interlayer of the storage tank and the capsule when the foam liquid reaches 3/4, and closing the air outlet valve of the capsule, the air outlet valve of the tank shell, the liquid filling valve and the drain valve when the foam liquid overflows from the air outlet of the capsule.

When filling with the priming pump:

firstly, connecting a liquid outlet pipe of a liquid injection pump with a liquid injection interface of the pump, and inserting the tail end of a liquid suction pipe of the liquid injection pump into the bottom of a foam cylinder;

opening a water drain valve, filling water into an interlayer between the storage tank and the capsule, wherein the water filling amount is 1/4 of the device, slowly opening the valve during water flushing, and closing the water drain valve after water filling is finished;

opening a liquid injection valve of the pump, starting the liquid injection pump, filling foam liquid into the tank, observing a liquid level meter, opening a drain valve to drain water in the interlayer of the storage tank and the capsule when the foam liquid reaches 3/4, and closing the liquid injection pump and then closing all other valves when the foam liquid overflows from the air outlet of the capsule.

In conclusion, the injection pressure of the foam liquid is higher than the water pressure at the low pressure part of the proportioning mixer through the lifting damper, so that the normal supply of the foam liquid is ensured.

In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts in the embodiments are referred to each other. The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.