Hydraulic control compressed air flow regulating valve

Abstract

A hydraulic control compressed air flow regulating valve is installed on a main flow pipeline and comprises an eccentric pipeline, an installation plate, an elastic limiting assembly and an iris switch assembly connected with the installation plate through a supporting column. A gas inlet is formed in the bottom of a switch of the iris switch assembly, and the top of the switch is connected with the gas-liquid mixer through an elbow; a gear is arranged at the bottom of the iris switch assembly, a rack meshed with the gear is installed on the installation plate, and one end of the rack abuts against the elastic limiting assembly. A hydraulic driving assembly is arranged in the eccentric pipeline, the top of the hydraulic driving assembly is connected with the iris switch assembly through a shaft connector, and the side wall of the hydraulic driving assembly extends into the main flow pipeline. According to the utility model, the opening or closing of the iris switch assembly is controlled through the hydraulic driving assembly, that is, the injection amount of compressed air is controlled by the water pressure and flow change of the main runner, so that the gas-liquid mixing ratio tends to be stable, and the fire extinguishing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing equipment, in particular to a hydraulic control compressed air flow regulating valve. Background Art

[0002] The compressed air foam fire extinguishing system is a new type of fire extinguishing technology. It generates homogeneous compressed air foam by mixing water, foam liquid and compressed air in a closed pipeline according to the set mixing ratio and gas-liquid ratio. At present, the scale of the compressed air foam fire extinguishing system in the market is still small. In this system, most of the compressed air is injected in an electronically controlled metering type. When the water pressure or flow rate in the main flow channel is unstable, there will be a large deviation in the mixing ratio of the injected compressed air flow rate, thus affecting the fire extinguishing effect of the foam mixed liquid. Content of the Utility Model

[0003] Based on this, the purpose of the utility model is to provide a hydraulic control compressed air flow regulating valve. The injection amount of compressed air is controlled by the water pressure and flow rate changes in the main flow channel, so that the gas-liquid mixing ratio tends to be stable, thereby improving the fire extinguishing efficiency.

[0004] A hydraulic control compressed air flow regulating valve is installed on the main pipeline, including an eccentric pipeline provided on the side wall of the main pipeline, a mounting plate provided on the top of the eccentric pipeline, an elastic limit component provided on the mounting plate, and an iris switch component connected to the mounting plate through a support column;

[0005] An air inlet is provided at the bottom of the switch of the iris switch component, and the top of the switch is connected to the gas-liquid mixer through an elbow;

[0006] A gear is provided at the bottom of the iris switch component, a rack meshing with the gear is installed on the mounting plate, and one end of the rack abuts against the elastic limit component;

[0007] A hydraulic driving component is provided in the eccentric pipeline. The top of the hydraulic driving component is connected to the iris switch component through a shaft connector. The side wall of the hydraulic driving component extends into the main pipeline. Under the impact of the mixed liquid, the hydraulic driving component rotates to open the iris switch component.

[0008] Compared with the prior art, in the utility model, the opening or closing of the iris switch component is controlled by the hydraulic driving component, that is, the injection amount of compressed air is controlled by the water pressure and flow rate changes in the main flow channel, so that the gas-liquid mixing ratio tends to be stable, thereby improving the fire extinguishing efficiency.

[0009] Further, the hydraulic driving component includes an impeller shaft installed in the eccentric pipeline and an impeller provided on the impeller shaft;

[0010] The top of the impeller shaft is connected to the shaft connecting head, and the axis is located outside the main flow pipeline. The end of the impeller extends into the main flow pipeline.

[0011] Further, the elastic limit component includes a housing provided on the mounting plate, a spring provided inside the housing, and a T-shaped rod passing through the spring;

[0012] One end of the rack passes through the housing and abuts against the T-shaped end of the T-shaped rod;

[0013] The other end of the T-shaped rod penetrates through the housing, and an adjusting screw rod and a T-shaped block are sleeved on this end. The adjusting screw rod contacts the spring through the T-shaped block.

[0014] Further, the iris switch component includes a mounting seat connected to the support column, an iris fixed ring provided on the top of the mounting seat, an iris moving ring provided inside the mounting seat, and a plurality of iris pieces embedded between the iris moving ring and the iris fixed ring;

[0015] The top of the iris fixed ring is connected to the elbow, and the air inlet is located on the mounting seat and communicates with the iris moving ring;

[0016] The bottom of the iris moving ring passes through the mounting seat and is connected to the shaft connecting head. Under the action of the hydraulic drive component, the iris moving ring rotates, so that the plurality of iris pieces open to form a channel.

[0017] Further, an annular fixed track is provided in the iris fixed ring, and a moving slideway is provided in the iris moving ring;

[0018] A fixed slide shaft is provided on one surface of the iris piece, and a moving slide shaft is provided on the opposite surface. The moving slide shaft is located in the moving slideway, and the fixed slide shaft is located in the annular fixed track. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the hydraulic control compressed air flow regulating valve in the present invention;

[0020] Figure 2 is Figure 1 a schematic cross-sectional view along the center of the eccentric pipeline in ;

[0021] Figure 3 is Figure 1 an exploded view of the elastic limit component in ;

[0022] Figure 4 is Figure 1 an exploded view of the iris switch component in ;

[0023] Figure 5 isFigure 4 Schematic diagram of the closing or opening of the middle iris piece.

[0024] Description of main component symbols:

[0025] Main pipeline 10 Eccentric pipeline 11 Mounting plate 12 Elastic limit component 13 Outer shell 131 Spring 132 T-shaped rod 133 Adjusting lead screw 134 T-shaped block 135 Support column 14 Iris switch component 15 Mounting seat 151 Iris fixing ring 152 Ring-shaped fixed track 1521 Iris moving coil 153 Moving slideway 1531 Iris piece 154 Fixed slide shaft 1541 Moving slide shaft 1542 Air inlet 16 Elbow 17 Gear 18 Rack 19 Hydraulic drive component 20 Impeller shaft 201 Impeller 202 Shaft connector 21

[0026] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific embodiments

[0027] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0028] Please refer to Figures 1 to 5 , a hydraulic control compressed air flow regulating valve provided in an embodiment of the present utility model is installed on the main pipeline 10, and includes an eccentric pipeline 11 provided on the side wall of the main pipeline 10, a mounting plate 12 provided on the top of the eccentric pipeline 11, an elastic limiting component 13 provided on the mounting plate 12, and an iris switch component 15 connected to the mounting plate 12 through a support column 14;

[0029] An air inlet 16 is provided at the bottom of the switch of the iris switch component 15, and the top of the switch is connected to the gas-liquid mixer through an elbow 17;

[0030] A gear 18 is provided at the bottom of the iris switch component 15, a rack 19 meshing with the gear 18 is installed on the mounting plate 12, and one end of the rack 19 abuts against the elastic limiting component 13;

[0031] A hydraulic driving component 20 is provided in the eccentric pipeline 11, the top of the hydraulic driving component 20 is connected to the iris switch component 15 through a shaft connecting head 21, the side wall of the hydraulic driving component 20 extends into the main pipeline 10, and under the impact of the mixed liquid, the hydraulic driving component 20 rotates to open the iris switch component 15.

[0032] It should be noted that in the present utility model, in the main pipeline 10, the mixed liquid of water and foaming agent flows at a high speed and impacts the hydraulic drive assembly 20, causing the hydraulic drive assembly 20 to rotate. The gear 18 on the iris switch assembly 15 is driven by the shaft connector 21 to drive the rack 19 to move linearly. One end of the rack 19 is blocked by the elastic limit assembly 13. In this way, the rotation angle of the hydraulic drive assembly 20 is controlled by the elastic force of the elastic limit assembly 13 to maintain a certain rotation angle range. At the same time, the iris switch assembly 15 is opened, and compressed air enters from the air inlet 16, flows through the iris switch assembly 15 and the elbow 17, and then enters the air-liquid mixer.

[0033] Specifically, the opening size of the iris switch assembly 15 is related to the rotation angle of the iris switch assembly 15. Within a preset range, the larger the rotation angle, the larger the opening. However, the rotation angle is affected by the resistance of the elastic limit assembly 13 to the rack 19 and the driving force of the gear 18 on the rack 19. When the driving force is greater than the resistance, the opening of the iris switch assembly 15 gradually opens. On the contrary, the opening of the iris switch assembly 15 gradually closes. In this way, the flow rate of the compressed air will change with the change of the pressure and flow rate of the mixed liquid in the main pipeline 10 (for example: when the flow rate of the mixed liquid increases, the rotation speed of the gear 18 increases, the driving force increases, the opening becomes larger, the injection amount of the compressed air increases, and vice versa, it decreases), so that the air flow rate of the compressed air injected into the air-liquid mixer and the ratio of the mixed liquid tend to be stable.

[0034] Please refer to Figure 2 , in a preferred embodiment of the present application, the hydraulic drive assembly 20 includes an impeller shaft 201 installed in the eccentric pipeline 11 and an impeller 202 provided on the impeller shaft 201;

[0035] The top of the impeller shaft 201 is connected to the shaft connector 21, and the axis is located outside the main pipeline 10. The end of the impeller 202 extends into the main pipeline 10.

[0036] It should be noted that in the present application, since the end of the impeller 202 will be impacted by the mixed liquid, the impeller shaft 201 can be driven to rotate, thus realizing the function of no additional power drive.

[0037] Please refer to Figures 1 to 3 , in a preferred embodiment of the present application, the elastic limit assembly 13 includes a housing 131 provided on the mounting plate 12, a spring 132 provided inside the housing 131, and a T-shaped rod 133 passing through the spring 132;

[0038] One end of the rack 19 passes through the housing 131 and abuts against the T-shaped end of the T-shaped rod 133;

[0039] The other end of the T-shaped rod 133 penetrates through the housing 131, and an adjusting screw rod 134 and a T-shaped block 135 are sleeved on this end, and the adjusting screw rod 134 contacts the spring 132 through the T-shaped block 135.

[0040] It should be noted that in this application, the extrusion degree of the spring 132 is adjusted by the adjusting screw rod 134, that is, the resistance of the spring 132 to the rack 19 through the T-shaped rod 133 is adjusted. When the extrusion degree of the spring 132 is greater, the resistance generated by the spring 132 on the rack 19 is greater, and vice versa, the resistance is smaller.

[0041] Please refer to Figure 2 、 Figure 4 and Figure 5 In a preferred embodiment of the present application, the iris switch assembly 15 includes a mounting base 151 connected to the support column 14, an iris fixed ring 152 provided on the top of the mounting base 151, an iris moving ring 153 provided inside the mounting base 151, and a plurality of iris sheets 154 embedded between the iris moving ring 153 and the iris fixed ring 152;

[0042] The top of the iris fixed ring 152 is connected to the elbow 17, and the air inlet 16 is located on the mounting base 151 and communicates with the iris moving ring 152;

[0043] The bottom of the iris moving ring 153 passes through the mounting base 151 and is connected to the shaft connecting head 21. Under the action of the hydraulic driving assembly 20, the iris moving ring 153 rotates, so that the plurality of iris sheets 154 open to form a channel, and compressed air enters from the air inlet 16, flows through this channel and the elbow 17, and then enters the gas-liquid mixer.

[0044] Please refer to Figure 4 and Figure 5 In a preferred embodiment of the present application, an annular fixed track 1521 is provided in the iris fixed ring 152, and a moving slideway 1531 is provided in the iris moving ring 153;

[0045] A fixed slide shaft 1541 is provided on one surface of the iris sheet 154, and a moving slide shaft 1542 is provided on the opposite surface. The moving slide shaft 1542 is located in the moving slideway 1531, and the fixed slide shaft 1541 is located in the annular fixed track 1521.

[0046] In a preferred embodiment of the present application, the moving slideway 1531 is strip-shaped, and the annular fixed track 1521 is hexagonal. The number of the iris sheets 152 can be set according to actual requirements. Preferably, it is six. Under the rotation of the iris moving ring 153, the six independent iris sheets 152 also move correspondingly to form hexagonal channels of different sizes. Compressed air enters from the air inlet 16, flows through the channels and the elbow 17, and then enters the gas-liquid mixer.

[0047] In summary, in the present application, the opening or closing of the iris switch assembly 15 is controlled by the hydraulic driving assembly 20, that is, the injection amount of compressed air is controlled by the water pressure and flow rate changes in the main flow channel, so that the gas-liquid mixing ratio tends to be stable to improve the fire extinguishing efficiency.

[0048] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other. Moreover, the above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A hydraulically controlled compressed air flow regulating valve, characterized in that: Installed on the mainstream pipeline, including an eccentric pipeline arranged on the side wall of the mainstream pipeline, a mounting plate arranged on the top of the eccentric pipeline, an elastic limit assembly arranged on the mounting plate, and an iris switch assembly connected to the mounting plate through a support column; The bottom of the switch of the iris switch assembly is provided with an air inlet, and the top of the switch is connected to the gas-liquid mixer through an elbow; A gear is provided at the bottom of the iris switch assembly, a rack meshing with the gear is installed on the mounting plate, and one end of the rack abuts against the elastic limiting assembly; A hydraulic drive assembly is provided in the eccentric pipe, the top of the hydraulic drive assembly is connected to the iris switch assembly through an axial connector, and the side wall of the hydraulic drive assembly extends into the mainstream pipe. Under the impact of the mixed liquid, the hydraulic drive assembly rotates to open the iris switch assembly.

2. The hydraulically controlled compressed air flow regulating valve according to claim 1, characterized in that: The hydraulic drive assembly includes an impeller shaft installed in the eccentric pipe, and an impeller arranged on the impeller shaft; The top of the impeller shaft is connected to the shaft connector, and the axis is located outside the mainstream pipeline, and the end of the impeller extends into the mainstream pipeline.

3. The hydraulically controlled compressed air flow regulating valve according to claim 1, characterized in that: The elastic limiting assembly includes a shell arranged on the mounting plate, a spring arranged inside the shell, and a T-shaped rod passing through the spring; One end of the rack passes through the housing and abuts against the T-shaped end of the T-shaped rod; The other end of the T-shaped rod passes through the housing, and an adjusting screw rod and a T-shaped block are sleeved on the other end, and the adjusting screw rod contacts the spring through the T-shaped block.

4. The hydraulically controlled compressed air flow regulating valve according to claim 1, characterized in that: The iris switch assembly includes a mounting seat connected to the support column, an iris fixed coil arranged on the top of the mounting seat, an iris dynamic coil arranged inside the mounting seat, and a plurality of iris sheets embedded between the iris dynamic coil and the iris fixed coil; The top of the iris fixed coil is connected to the elbow, and the air inlet is located on the mounting seat and communicated with the iris moving coil; The bottom of the iris dynamic coil passes through the mounting seat and is connected to the shaft connector. Under the action of the hydraulic drive assembly, the iris dynamic coil rotates to open the multiple iris sheets and form a channel.

5. The hydraulically controlled compressed air flow regulating valve according to claim 4, characterized in that: The iris fixed coil is provided with a ring-shaped fixed track, and the iris moving coil is provided with a moving slideway; A fixed sliding shaft is arranged on one surface of the iris sheet, and a movable sliding shaft is arranged on the opposite surface. The movable sliding shaft is located in the movable sliding track, and the fixed sliding shaft is located in the annular fixed track.

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