Mechanical pumping type foam fire extinguishing device

Abstract

The invention relates to the technical field of pumping type foam fire extinguishing, and discloses a mechanical pumping type foam fire extinguishing device which comprises foam fire extinguishing equipment, the foam fire extinguishing equipment comprises a water turbine, the two sides of the water turbine fixedly communicate with a water inlet connecting device and a proportioning mixer correspondingly, and the water inlet connecting device comprises a water inlet pipe fixedly communicating with the water turbine; one side of the water inlet pipe is fixedly communicated with the detection pipe, the control valve is installed on the water inlet pipe, during regular detection, the control valve is closed, an external water pump is started, water enters the detection pipe after passing through the fixing flange and the water pump connecting pipe flange, and the water is pumped back to a source; water leakage can be directly observed on the outer sides of the fixing flange and the water pump connecting pipe flange, if only part of the water leakage is damaged and the water leakage is not obvious, detection can be carried out through the detection assemblies in the mounting holes, sealing gaskets in the fixing flange and the water pump connecting pipe flange can be conveniently checked in time, and the fixing flange and the water pump connecting pipe flange do not need to be disassembled.

Description

Technical Field

[0001] The invention relates to the technical field of pump-in foam fire extinguishing, in particular to a mechanical pump-in foam fire extinguishing device. Background Art

[0002] The foam fire extinguishing system is safe, reliable, economical, practical, and has high fire extinguishing efficiency. The foam proportioning mixing device is the core of the system. Currently, there are many types of foam proportioning mixing devices, such as pressure type and mechanical pump-in type. For fire extinguishing of large oil tank equipment, mechanical pump-in type is generally used. For example, the authorization announcement No. CN219333026U discloses a device for overspeed protection of a mechanical pump-in foam proportioning mixing device. This technical solution adds a pressure difference bypass valve structure to the mechanical pump-in foam proportioning mixing device to solve the problem that the mixing device may be damaged due to overspeed operation, thereby achieving the purpose of protecting the equipment.

[0003] The existing mechanical pump-in foam fire extinguishing device can drive the turbine to work by pumping water with a water pump. The blade-type or turbine-type turbine is connected to the foam liquid pump through a coupling. The pressurized water supplied by the water pump drives the turbine, so that the foam liquid pump injects foam liquid into the foam water pipeline behind the turbine according to a set ratio. The mixed liquid passes through the foam generator and then sprays foam to extinguish the fire.

[0004] The supply pressure of the water pump affects the mixing ratio of water and foam liquid in subsequent work. The existing water pump is generally connected to the water pipe at one end of the turbine through a flange. Similar to the above-mentioned prior art, the existing flanges are sealed by gaskets. After a long time, the gaskets will age and crack, resulting in water leakage, affecting the internal water pressure. Therefore, it is necessary to check them regularly to avoid serious consequences in the event of a fire. During the inspection, the two flanges need to be disassembled to observe the damage of the internal gaskets, which is more troublesome. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a mechanical pump-in foam fire extinguishing device which is convenient for timely inspection of the sealing gasket in the flange.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mechanical pump-in foam fire extinguishing device, comprising a foam fire extinguishing device, the foam fire extinguishing device comprising a turbine, the two sides of the turbine are respectively fixedly connected with a water inlet connection device and a proportional mixer, the water inlet connection device comprises a water inlet pipe fixedly connected with the turbine, a fixed flange is fixedly installed at one end of the water inlet pipe, a water pump connection pipe flange is arranged on one side of the fixed flange, a detection pipe is fixedly connected to one side of the water inlet pipe, a control valve is installed on the water inlet pipe, one side of the fixed flange and the water pump connection pipe flange are penetrated with mutually connected mounting holes, a bolt is penetrated in the mounting hole, a nut is threadedly connected at one end of the bolt, a circular groove is arranged at one end of the bolt, a detection component is installed in the circular groove, a pushing component for controlling the movement of the detection component is also arranged in the bolt, a circular ring is provided on the sliding sleeve of the water inlet pipe, a through hole connected to the detection component is penetrated on one side of the circular ring, a fixing component for fixing the detection component is installed in the circular ring, and a rotating component is rotatably arranged on one side of the circular ring.

[0007] Preferably, the detection component includes a transparent cylinder slidably connected to the circular groove, a side wall at one end of the transparent cylinder is provided with an annular groove, a mounting shell is slidably installed in the annular groove, the mounting shell is composed of a metal mesh, a paint bag is placed in the mounting shell, a liquid inlet hole connected to the circular groove is provided on the circumference of the bolt, a conical groove is provided on the side wall at the other end of the cylinder, a white sponge is arranged on the inner side of the mounting shell, a push rod is fixedly installed through the white sponge, and a transparent plate is fixedly installed on the outer end of the push rod.

[0008] Preferably, the pushing assembly comprises a cavity opened in the bolt, a telescopic spring is fixedly installed in the cavity, and one end of the push rod is located in the cavity and abuts against the telescopic spring.

[0009] Preferably, the fixing component includes an annular cavity opened in the circular ring, a plurality of connecting gears are rotatably installed in the annular cavity, a sawtooth rod slidably connected to the annular cavity is meshed on the outer side of the connecting gear, a gear ring meshed with the plurality of connecting gears is rotatably arranged in the annular cavity, a rotating part is penetrated through the outer side of the circular ring, an annular socket connected to the sawtooth rod is opened on the outer side of the cylinder, and the rotating part is used to control the connection between the sawtooth rod and the annular socket.

[0010] Preferably, the rotating part includes a connecting groove provided on the side wall of the annular cavity, a gear rod meshing with the gear ring is rotatably installed in the connecting groove, an arc-shaped sliding opening is provided on the outer side of the gear rod, a fixed screw rod that is threadedly connected to the water inlet pipe passes through the outer side of the circular ring, and a sliding block that is slidably connected to the arc-shaped sliding opening is rotatably provided on one side of the fixed screw rod.

[0011] Preferably, the rotating assembly includes a connecting ring located on one side of the circular ring, a limiting assembly is arranged between the connecting ring and the circular ring, a plurality of circular holes are opened through one side of the connecting ring at equal intervals, and blocking rods and sealing plates are fixedly installed in some of the circular holes.

[0012] Preferably, the limiting assembly includes an annular mounting groove opened on one side of the circular ring, a plurality of bayonet holes are opened at equal intervals on the side wall of the annular mounting groove, a mounting ring is rotatably installed in the annular mounting groove, a plurality of elastic buckles corresponding to the bayonet positions are fixedly installed on the outside of the mounting ring, and a telescopic assembly is arranged between the mounting ring and the connecting ring.

[0013] Preferably, the telescopic assembly comprises a connecting shell fixedly connected to the mounting ring, a connecting rod fixedly connected to the connecting ring is slidably connected in the connecting shell, and a fixing spring is fixedly arranged between the connecting rod and the connecting shell.

[0014] Preferably, a sealing gasket is detachably provided between the fixed flange and the water pump connecting pipe flange.

[0015] Preferably, the foam fire extinguishing equipment also includes a foam stock liquid transfer pump connected to the water turbine, a foam stock liquid connecting pipe is fixedly connected to one side of the foam stock liquid transfer pump, the foam stock liquid connecting pipe is fixedly connected to an external foam stock liquid storage tank, the foam stock liquid transfer pump is also fixedly connected to a foam stock liquid transfer pipe fixedly connected to a proportioning mixer, the proportioning mixer is fixedly connected to an external foam generator through a pipeline, a reflux backwash pipe is fixedly connected between the water inlet pipe and the foam stock liquid connecting pipe, and a valve is installed on the reflux backwash pipe.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention fixes a connecting detection tube on one side of the water inlet pipe and installs a control valve on the water inlet pipe. During regular inspection, the control valve is closed, the external water pump is started, and the water enters the detection tube after passing through the fixed flange and the water pump connecting pipe flange, and the water is pumped back to the source. If the sealing gasket is seriously damaged, water leakage can be directly observed on the outside of the fixed flange and the water pump connecting pipe flange. If there is only partial damage, resulting in unclear water leakage, it can be detected through the detection component in the installation hole, so that the sealing gasket in the fixed flange and the water pump connecting pipe flange can be checked in time without disassembling the fixed flange and the water pump connecting pipe flange.

[0018] 2. The present invention connects a transparent cylinder by sliding it in a circular groove of a bolt, places a pigment bag in a mounting shell at one end of the transparent cylinder, and opens a liquid inlet hole connected to the circular groove on the side of the bolt. When the sealing gasket is damaged and there is a small amount of water leakage, the water is absorbed by the white sponge through the liquid inlet hole and the pigment bag. When there is more water, it can flow to one side of the transparent plate, which is convenient for timely observation during detection. When there is less water, the white sponge can be controlled to move to observe whether the white sponge is dyed.

[0019] 3. The present invention provides a connecting ring on one side of the circular ring, and penetrates a plurality of circular holes at equal intervals on one side of the connecting ring. The circular holes are sequentially circulated to a state where a sealing plate, a baffle rod and no structure is provided in the circular holes. When no detection is performed, the sealing plate shields the transparent plate to prevent the transparent plate from being exposed to the outside for a long time and affecting subsequent observation. When detection is required, the connecting ring is rotated to block the transparent plate through the baffle rod to observe whether there is colored liquid on one side of the transparent plate. If not, the connecting ring is rotated so that no circular hole is provided inside to correspond to the position of the transparent plate. At this time, due to the cooperation of the pushing assembly, the white sponge is pushed to the transparent cylinder outside the bolt to observe whether the white sponge is dyed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention from a front view;

[0021] Figure 2 It is a schematic diagram of the overall rear-view stereoscopic structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the fixing flange and the water pump connecting pipe flange of the present invention;

[0023] Figure 4 for Figure 3 A is a schematic diagram of the enlarged structure of the middle part;

[0024] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of B;

[0025] Figure 6 It is a schematic diagram of the split three-dimensional structure of the bolt and the cylinder of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the circular ring of the present invention;

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the ring of the present invention;

[0028] Fig. 9 It is a schematic diagram of the split three-dimensional structure of the circular ring and the connecting ring of the present invention;

[0029] Fig.10It is a schematic diagram of the three-dimensional structure of the rotating part of the present invention.

[0030] In the figure: 1. turbine; 2. proportion mixer; 3. fixing spring; 4. elastic buckle; 5. annular mounting groove; 6. circular hole; 7. slider; 8. fixing flange; 9. detection tube; 10. flange of water pump connecting pipe; 11. control valve; 12. bolt; 13. water inlet pipe; 14. circular ring; 15. connecting ring; 16. connecting rod; 17. liquid inlet hole; 18. mounting ring; 19. fixing screw; 20. connecting shell; 21. perforation; 22. white sponge; 23. Push rod; 24, telescopic spring; 25, cavity; 26, arc-shaped slide; 27, mounting shell; 28, transparent cylinder; 29, annular socket; 30, transparent plate; 31, stop rod; 32, serrated plug rod; 33, circular groove; 34, annular cavity; 35, sealing plate; 36, gear stick; 37, connecting gear; 38, gear ring; 39, connecting groove; 40, foam stock solution connecting pipe; 41, foam stock solution transfer pump; 42, reflux backwash pipe; 43, foam stock solution transfer pipe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] Example

[0033] See also Figure 1-Figure 10A mechanical pump-in foam fire extinguishing device includes a foam fire extinguishing device, the foam fire extinguishing device includes a turbine 1, and the two sides of the turbine 1 are respectively fixedly connected with a water inlet connection device and a proportional mixer 2, the water inlet connection device includes a water inlet pipe 13 fixedly connected to the turbine 1, a fixed flange 8 is fixedly installed at one end of the water inlet pipe 13, a water pump connecting pipe flange 10 is arranged on one side of the fixed flange 8, and a sealing gasket is detachably arranged between the fixed flange 8 and the water pump connecting pipe flange 10, which is convenient for replacement and installation after damage, the foam fire extinguishing device also includes a foam stock liquid transfer pump 41 connected to the turbine 1, and a foam stock liquid connection pipe 40 is fixedly connected to one side of the foam stock liquid transfer pump 41, and the foam stock liquid connection pipe 40 is fixedly connected to an external foam stock liquid storage tank, and the foam The stock liquid transfer pump 41 is also fixedly connected with a foam stock liquid transfer pipe 43 fixedly connected with the proportioning mixer 2. The proportioning mixer 2 is fixedly connected with an external foam generator through a pipeline. A reflux backwash pipe 42 is fixedly connected between the water inlet pipe 13 and the foam stock liquid connecting pipe 40. A valve is installed on the reflux backwash pipe 42. If a fire alarm occurs in the outside, the outside water pump will be started in time, and the pressurized water supplied by the water pump drives the turbine 1 to work. The turbine 1 is connected to the foam stock liquid transfer pump 41 through a coupling (the prior art will not be described in detail here). The foam stock liquid transfer pump 41 can inject foam liquid into the proportioning mixer 2 behind the turbine 1 according to the set ratio. The mixed liquid passes through the external foam generator and sprays foam to extinguish the fire;

[0034] A detection tube 9 is fixedly connected to one side of the water inlet pipe 13, and a control valve 11 is installed on the water inlet pipe 13. The fixed flange 8 and the water pump connecting pipe flange 10 are penetrated with mutually connected mounting holes on one side. Bolts 12 are passed through the mounting holes. A nut is threadedly connected to one end of the bolt 12. A circular groove 33 is opened at one end of the bolt 12. A detection component is installed in the circular groove 33. During regular inspection, the control valve 11 is closed, and the external water pump is started. Water enters the detection tube 9 after passing through the fixed flange 8 and the water pump connecting pipe flange 10, and the water is pumped back to the source. If the sealing gasket is seriously damaged, water leakage can be directly observed on the outside of the fixed flange 8 and the water pump connecting pipe flange 10. If it is only partially damaged, resulting in unclear water leakage, it can be detected through the detection component in the mounting hole, which is convenient for timely inspection of the sealing gaskets in the fixed flange 8 and the water pump connecting pipe flange 10, without disassembling the fixed flange 8 and the water pump connecting pipe flange 10;

[0035] The detection component includes a transparent cylinder 28 slidably connected with the circular groove 33, a side wall of one end of the transparent cylinder 28 is provided with an annular groove, a mounting shell 27 is slidably installed in the annular groove, the mounting shell 27 is composed of a metal mesh, a pigment bag is placed in the mounting shell 27, a liquid inlet 17 connected with the circular groove 33 is provided on the side of the bolt 12, a conical groove is provided on the side wall of the other end of the transparent cylinder 28, a white sponge 22 is arranged on the inner side of the mounting shell 27, a push rod 23 is fixedly installed through the white sponge 22, and a transparent plate 30 is fixedly installed on the outer end of the push rod 23. During detection, if the sealing gasket is damaged and there is a small amount of water leakage, the water is absorbed by the white sponge 22 through the liquid inlet 17 and the pigment bag. When there is more water, it can flow to one side of the transparent plate 30, which is convenient for timely observation during detection. When there is less water, the white sponge 22 can be controlled to move to observe whether the white sponge 22 is dyed.

[0036] A pushing component for controlling the movement of the detection component is also provided in the bolt 12, and the pushing component includes a cavity 25 opened in the bolt 12, and a telescopic spring 24 is fixedly installed in the cavity 25. One end of the push rod 23 is located in the cavity 25 and abuts against the telescopic spring 24. A circular ring 14 is slidingly sleeved on the water inlet pipe 13, and a through hole 21 connected to the detection component is penetrated on one side of the circular ring 14. A fixing component for fixing the detection component is installed in the circular ring 14, and a rotating component is rotatably arranged on one side of the circular ring 14.

[0037] As a further technical solution of the present invention, the fixing assembly includes an annular cavity 34 provided in the circular ring 14, a plurality of connecting gears 37 are rotatably installed in the annular cavity 34, a sawtooth rod 32 slidably connected to the annular cavity 34 is meshed and connected to the outer side of the connecting gear 37, a gear ring 38 meshing with the plurality of connecting gears 37 is rotatably provided in the annular cavity 34, a rotating member is provided through the outer side of the circular ring 14, an annular socket 29 connected to the sawtooth rod 32 is provided on the outer side of the transparent cylinder 28, the rotating member is used to control the connection between the sawtooth rod 32 and the annular socket 29, the rotating member includes a connecting groove 39 provided on the side wall of the annular cavity 34, a gear meshing with the gear ring 38 is rotatably installed in the connecting groove 39 The gear stick 36 has an arc-shaped sliding opening 26 on the outside of the gear stick 36, and a fixed screw 19 is threadedly connected to the outside of the ring 14 and is abutted against the water inlet pipe 13. A slider 7 is rotatably provided on one side of the fixed screw 19 and is slidably connected to the arc-shaped sliding opening 26. After one end of the transparent cylinder 28 is located in the through hole 21, the fixed screw 19 is rotated to move downward to abut against the water inlet pipe 13 to fix the position of the ring 14. While the fixed screw 19 is rotated downward, the gear stick 36 can be driven to rotate through the cooperation of the arc-shaped sliding opening 26 and the slider 7, and then the serrated plug 32 can be driven to move and connect with the annular socket 29 through the cooperation of the gear ring 38 and the connecting gear 37 to fix the transparent cylinder 28.

[0038] As a further technical solution of the present invention, the rotating component includes a connecting ring 15 located on one side of the circular ring 14, a limiting component is arranged between the connecting ring 15 and the circular ring 14, a plurality of circular holes 6 are uniformly spaced through one side of the connecting ring 15, a blocking rod 31 and a sealing plate 35 are fixedly installed in some of the circular holes 6 (the circular hole 6 is cycled in sequence to a state where the sealing plate 35, the blocking rod 31 and the circular hole 6 are not provided with any structure), the limiting component includes an annular mounting groove 5 opened on one side of the circular ring 14, a plurality of bayonet holes are uniformly spaced on the side wall of the annular mounting groove 5, a mounting ring 18 is rotatably installed in the annular mounting groove 5, a plurality of elastic buckles 4 aligned with the bayonet positions are fixedly installed on the outside of the mounting ring 18, a telescopic component is arranged between the mounting ring 18 and the connecting ring 15, the telescopic component includes The mounting ring 18 is fixedly connected to the connecting shell 20, and a connecting rod 16 fixedly connected to the connecting ring 15 is slidably connected inside the connecting shell 20, and a fixing spring 3 is fixedly arranged between the connecting rod 16 and the connecting shell 20. When not detecting, the sealing plate 35 blocks the transparent plate 30 to prevent the transparent plate 30 from being exposed to the outside for a long time and affecting subsequent observation. When detection is required, the connecting ring 15 is rotated to block the transparent plate 30 through the blocking rod 31 to observe whether there is colored liquid on one side of the transparent plate 30. If not, the connecting ring 15 is rotated so that no circular hole 6 is set inside to correspond to the position of the transparent plate 30. At this time, due to the cooperation of the telescopic spring 24, the white sponge 22 is pushed to the transparent cylinder 28 outside the bolt 12 to observe whether the white sponge 22 is dyed.

[0039] After the inspection is completed, the transparent cylinder 28 can be disassembled and replaced with a new detection component.

[0040] Working principle: If a fire alarm occurs outside, the outside water pump will be started in time, and the pressure water supplied by the water pump will drive the turbine 1 to work. The turbine 1 is connected to the foam stock liquid transfer pump 41 through a coupling (the existing technology will not be described in detail here), so that the foam stock liquid transfer pump 41 can inject foam liquid into the proportioning mixer 2 behind the turbine 1 according to the set proportion. The mixed liquid passes through the external foam generator and sprays foam to extinguish the fire;

[0041] During regular inspection, close the control valve 11, start the external water pump, and the water will enter the detection pipe 9 through the fixed flange 8 and the water pump connecting pipe flange 10, and the water will be pumped back to the source. If the sealing gasket is seriously damaged, water leakage can be directly observed on the outside of the fixed flange 8 and the water pump connecting pipe flange 10;

[0042] If only part of the damage occurs, resulting in no obvious water leakage, the connecting ring 15 is rotated, and the connecting ring 15 drives the mounting ring 18 to rotate through the connecting rod 16 and the connecting shell 20. When an external force is applied to rotate the mounting ring 18, the elastic buckle 4 is deformed. When no external force is applied to rotate the mounting ring 18, the position of the connecting ring 15 can be limited (when not detecting, the sealing plate 35 is controlled to always be in a state of shielding the transparent plate 30 to prevent the transparent plate 30 from being exposed to the outside for a long time and affecting subsequent observation). The connecting ring 15 is rotated to move the blocking rod 31 to the transparent plate 30 On one side, the transparent plate 30 is blocked by the blocking rod 31 to observe whether there is colored liquid on one side of the transparent plate 30 (if the sealing gasket is damaged and there is a small amount of water leakage, the water is absorbed by the white sponge 22 through the liquid inlet hole 17 and the pigment bag. When there is more water, it can flow to the side of the transparent plate 30). If not, the connecting ring 15 is rotated so that no circular hole 6 is set inside to correspond to the position of the transparent plate 30. At this time, due to the cooperation of the telescopic spring 24, the white sponge 22 is pushed to the transparent cylinder 28 outside the bolt 12 to observe whether the white sponge 22 is dyed;

[0043] If the sealing gasket is damaged, it can be repaired and replaced in time. The transparent cylinder 28 is detachable and can be replaced with a new detection component.

[0044] If the sealing gasket is not damaged as detected above, pull the connecting ring 15 (fixing spring 3 is stretched) to make the circular hole 6 detach from the transparent plate 30, rotate the connecting ring 15 so that the sealing plate 35 corresponds to the position of the transparent plate 30, and then push the transparent plate 30 to reset (the elastic force of the fixing spring 3 is greater than the elastic force of the telescopic spring 24).

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, it is obvious to those skilled in the art that the features thereof are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical pump-in foam fire extinguishing device, comprising foam fire extinguishing equipment, characterized in that: The foam fire extinguishing equipment comprises a water turbine (1), and a water inlet connection device and a proportioning mixer (2) are fixedly connected on both sides of the water turbine (1), the water inlet connection device comprises a water inlet pipe (13) fixedly connected to the water turbine (1), a fixed flange (8) is fixedly installed at one end of the water inlet pipe (13), a water pump connecting pipe flange (10) is arranged on one side of the fixed flange (8), a detection pipe (9) is fixedly connected on one side of the water inlet pipe (13), a control valve (11) is installed on the water inlet pipe (13), and one side of the fixed flange (8) and the water pump connecting pipe flange (10) are penetrated by mutually openings A connecting mounting hole is provided, wherein a bolt (12) is passed through the mounting hole, one end of the bolt (12) is threadedly connected to a nut, one end of the bolt (12) is provided with a circular groove (33), a detection component is installed in the circular groove (33), a pushing component for controlling the movement of the detection component is also provided in the bolt (12), a circular ring (14) is slidably sleeved on the water inlet pipe (13), a through hole (21) connected to the detection component is penetrated and opened on one side of the circular ring (14), a fixing component for fixing the detection component is installed in the circular ring (14), and a rotating component is rotatably provided on one side of the circular ring (14).

2. A mechanical pump-in foam fire extinguishing device according to claim 1, characterized in that: The detection component comprises a transparent cylinder (28) slidably connected to the circular groove (33); a side wall at one end of the transparent cylinder (28) is provided with an annular groove; a mounting shell (27) is slidably mounted in the annular groove; the mounting shell (27) is made of a metal mesh; a paint bag is placed in the mounting shell (27); a liquid inlet hole (17) connected to the circular groove (33) is provided on the circumference of the bolt (12); a conical groove is provided on the side wall at the other end of the transparent cylinder (28); a white sponge (22) is arranged on the inner side of the mounting shell (27); a push rod (23) is fixedly mounted through the white sponge (22); a transparent plate (30) is fixedly mounted on the outer end of the push rod (23).

3. A mechanical pump-in foam fire extinguishing device according to claim 2, characterized in that: The pushing assembly comprises a cavity (25) opened in the bolt (12), a telescopic spring (24) is fixedly installed in the cavity (25), and one end of the push rod (23) is located in the cavity (25) and abuts against the telescopic spring (24).

4. A mechanical pump-in foam fire extinguishing device according to claim 3, characterized in that: The fixing assembly comprises an annular cavity (34) provided in the circular ring (14), a plurality of connecting gears (37) being rotatably mounted in the annular cavity (34), a sawtooth rod (32) being meshedly connected to the annular cavity (34) on the outer side of the connecting gear (37), a gear ring (38) being rotatably provided in the annular cavity (34) and meshing with the plurality of connecting gears (37), a rotating member being provided through the outer side of the circular ring (14), an annular socket (29) being connected to the sawtooth rod (32) being provided on the outer side of the transparent cylinder (28), and the rotating member being used to control the connection between the sawtooth rod (32) and the annular socket (29).

5. A mechanical pump-in foam fire extinguishing device according to claim 4, characterized in that: The rotating member comprises a connecting groove (39) provided on the side wall of the annular cavity (34), a gear rod (36) meshing with a gear ring (38) being rotatably mounted in the connecting groove (39), an arc-shaped sliding opening (26) being provided on the outer side of the gear rod (36), a fixing screw rod (19) being threadedly connected to the water inlet pipe (13) penetrating the outer side of the circular ring (14), a sliding block (7) slidably connected to the arc-shaped sliding opening (26) being rotatably provided on one side of the fixing screw rod (19).

6. A mechanical pump-in foam fire extinguishing device according to claim 5, characterized in that: The rotating assembly comprises a connecting ring (15) located on one side of the circular ring (14), a limiting assembly is arranged between the connecting ring (15) and the circular ring (14), a plurality of circular holes (6) are formed through one side of the connecting ring (15) at equal intervals, and a blocking rod (31) and a sealing plate (35) are fixedly installed in some of the circular holes (6).

7. A mechanical pump-in foam fire extinguishing device according to claim 6, characterized in that: The limiting assembly comprises an annular mounting groove (5) provided on one side of a circular ring (14); a plurality of bayonet holes are provided on the side wall of the annular mounting groove (5) at equal intervals; a mounting ring (18) is rotatably mounted in the annular mounting groove (5); a plurality of elastic buckles (4) aligned with the bayonet holes are fixedly mounted on the outer side of the mounting ring (18); and a telescopic assembly is provided between the mounting ring (18) and the connecting ring (15).

8. A mechanical pump-in foam fire extinguishing device according to claim 7, characterized in that: The telescopic assembly comprises a connecting shell (20) fixedly connected to a mounting ring (18), a connecting rod (16) fixedly connected to a connecting ring (15) being slidably connected inside the connecting shell (20), and a fixing spring (3) being fixedly arranged between the connecting rod (16) and the connecting shell (20).

9. A mechanical pump-in foam fire extinguishing device according to claim 1, characterized in that: A sealing gasket is detachably provided between the fixed flange (8) and the water pump connecting pipe flange (10).

10. A mechanical pump-in foam fire extinguishing device according to claim 1, characterized in that: The foam fire extinguishing equipment further comprises a foam stock solution transfer pump (41) connected to the turbine (1); a foam stock solution connection pipe (40) is fixedly connected to one side of the foam stock solution transfer pump (41); the foam stock solution connection pipe (40) is fixedly connected to an external foam stock solution storage tank; the foam stock solution transfer pump (41) is also fixedly connected to a foam stock solution transfer pipe (43) fixedly connected to a proportioning mixer (2); the proportioning mixer (2) is fixedly connected to an external foam generator through a pipeline; a reflux backwash pipe (42) is fixedly connected between the water inlet pipe (13) and the foam stock solution connection pipe (40); a valve is installed on the reflux backwash pipe (42).

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