Foam supply trailer

Abstract

The utility model relates to a foam supply trailer, belongs to the technical field of fire fighting equipment, and aims to solve the problem that the oxygen isolation capability is weakened due to the fact that gas in foam can escape after the foam is broken, the foam supply trailer comprises a trailer body, and the upper end of the trailer body is fixedly connected with a foam storage tank. A driving motor is fixedly connected to the side wall of the foam storage tank, a box body is fixedly connected to the inner wall of the foam storage tank, a piston head is slidably connected to the interior of the box body, a pull rod is fixedly connected to the piston head, a rotating plate is fixedly connected to the output end of the driving motor, and the rotating plate is connected with the pull rod through a connecting mechanism. According to the foam storage tank, gas generated by foam breaking in the foam storage tank can be reused in the storage process, the requirement for new gas is reduced, resources are saved, new foam can be rapidly generated, and therefore the coverage area of the foam is enlarged, and the duration time of the foam is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fire fighting equipment, in particular to a foam supply trailer. Background Art

[0002] Fire foam supply trailer is an important fire fighting equipment, which is used to provide foam fire extinguishing agent at the fire scene. It is generally praised by users for its compact structure, no need for water and power source, small fire extinguishing water stains, good environmental performance, etc. However, the existing foam supply trailer still has certain shortcomings when in use.

[0003] For example, a multifunctional fire-fighting and rescue device with publication number CN215505265U integrates six types of equipment, namely, compressed gas foam fire-fighting device, firefighter personal protective equipment, escape equipment, demolition equipment, lighting system, and warning light alarm system, on a small mobile platform to form a multifunctional fire-fighting and rescue device. However, when the trailer is moving, it is affected by external environmental factors and the foam in the foam storage tank on the trailer will rupture after being violently impacted. The gas in the foam will escape, and its ability to isolate oxygen will be weakened, thereby reducing the fire-fighting effect.

[0004] So we proposed a foam supply trailer to solve the problems mentioned above. Utility Model Content

[0005] The utility model aims to provide a foam supply trailer to solve the problem raised by the above-mentioned background technology that in the process of moving the trailer on the market, the foam in the foam storage tank on the trailer is affected by external environmental factors, and the foam will burst after being violently impacted, and the gas in the foam will escape, so that its ability to isolate oxygen will be weakened, thereby reducing the fire extinguishing effect.

[0006] To achieve the above object, the utility model provides the following technical solution: a foam supply trailer, comprising a trailer body, the upper end of the trailer body is fixedly connected to a foam storage tank, and the side wall of the foam storage tank is fixedly connected to a driving motor;

[0007] Also includes:

[0008] The inner wall of the foam storage tank is fixedly connected to a box body, and a piston head is slidably connected to the box body, a pull rod is fixedly connected to the piston head, a rotating plate is fixedly connected to the output end of the driving motor, and the rotating plate and the pull rod are connected through a connecting mechanism;

[0009] An air inlet pipe is fixedly connected to the side wall of the box body, and an air outlet connected to the air inlet pipe is provided on the side wall of the box body, a rubber block is fixedly connected to the top of the air inlet pipe, and a first sealing plate is slidably connected to the air inlet pipe, and an air inlet hole is provided on the first sealing plate, an air outlet pipe is fixedly connected to the bottom end of the box body, and an air outlet connected to the air outlet pipe is provided at the bottom end of the box body, and a second sealing plate is arranged in the air outlet pipe below the air outlet, and a bottom plate is fixedly connected to the inner wall of the foam storage tank below the second sealing plate.

[0010] Preferably, the top end of the pull rod extends through the box body, and the pull rod is slidably connected to the box body.

[0011] Preferably, the connecting mechanism includes a fixing member, a straight groove and a movable rod, the fixing member is fixedly connected to the protruding end of the pull rod, and a straight groove is provided in the fixing member, the movable rod is slidably arranged in the straight groove, and the end of the movable rod away from the straight groove is fixedly connected to the rotating plate.

[0012] Preferably, the first blocking plate is aligned with the air outlet, and the diameter of the first blocking plate is larger than the diameter of the air outlet, and a tension spring is connected between the first blocking plate and the air inlet pipe, and an elastic telescopic structure is formed between the first blocking plate and the air inlet pipe through the tension spring.

[0013] Preferably, the air inlet hole is aligned with the rubber block, and the air inlet hole matches the rubber block.

[0014] Preferably, the second blocking plate is slidably connected to the air outlet pipe, the second blocking plate is aligned with the air outlet, and the diameter of the second blocking plate is greater than the diameter of the air outlet.

[0015] Preferably, a compression spring is fixedly connected to the upper end of the bottom plate, and one end of the compression spring away from the bottom plate extends into the air outlet pipe and is fixedly connected to the bottom end of the second blocking plate, and the bottom end of the air outlet pipe does not contact the inner wall of the foam storage tank.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the foam supply trailer can reuse the gas generated by the collapse of the foam in the foam storage tank during storage, reducing the demand for new gas, thereby saving resources, and can quickly generate new foam, thereby expanding the coverage area and duration of the foam. The specific contents are as follows:

[0017] 1. A rotating plate and a movable rod are provided. The rotating plate is driven to rotate by a driving motor, so that the rotating plate drives the movable rod to rotate synchronously, so that the movable rod slides in the straight groove, and then drives the fixed part to reciprocate up and down. When the fixed part moves, it drives the pull rod, so that the pull rod drives the piston head to move. The structure is simple, which ensures the stable operation of the device and is easy to maintain.

[0018] 2. A first sealing plate and a second sealing plate are provided. During the upward movement of the piston head, the second sealing plate will be in close contact with the air outlet under the elastic force of the compression spring, so that the pressure in the box is lower than that in the outside. When the piston head moves above the first sealing plate, the first sealing plate is pushed to slide, so that the external gas can enter the box through the air inlet hole on the first sealing plate, thereby restoring the pressure inside and outside the box to be consistent. Then, the first sealing plate will reset and move under the elastic force of the tension spring, so that the air inlet hole is aligned with the rubber block to block the external gas from entering. At the same time, when the piston head moves downward, the second sealing plate will be opened, so that the gas can be transported to the air outlet pipe through the air outlet, and then transported back to the solution through the air outlet pipe, thereby generating new bubbles, which is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the side section structure of the utility model;

[0021] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0022] Figure 4 It is a schematic diagram of the main cross-sectional structure of the utility model.

[0023] In the figure: 1. trailer body; 2. foam storage tank; 3. drive motor; 4. box body; 401. air inlet; 402. air outlet; 5. piston head; 6. pull rod; 7. fixing piece; 701. straight groove; 8. movable rod; 9. rotating plate; 10. air inlet pipe; 11. rubber block; 12. air outlet pipe; 13. tension spring; 14. first blocking plate; 1401. air inlet hole; 15. bottom plate; 16. compression spring; 17. second blocking plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-Figure 4 As shown, the utility model provides a technical solution: a foam supply trailer, comprising a trailer body 1, a foam storage tank 2 is fixedly connected to the upper end of the trailer body 1, and a driving motor 3 is fixedly connected to the side wall of the foam storage tank 2.

[0026] The present technical solution utilizes the setting of the trailer body 1 and the foam storage tank 2. When in use, the foam storage tank 2 is first fixedly installed on the upper end of the trailer body 1, and then the trailer body 1 is connected to the tractor. Further, the filling cap on the foam storage tank 2 is opened, and the foam pump or other injection equipment is used to slowly inject the foam liquid into the foam storage tank 2. Pay attention to controlling the injection speed to avoid excessive overflow of the foam liquid or excessive generation of foam. After the foam liquid injection is completed, the filling cap on the foam storage tank 2 can be closed.

[0027] Embodiment 2: The technical content disclosed in this embodiment is an improvement made on the basis of the above-mentioned embodiment 1. The existing device is not convenient for utilizing gas. Figure 1 and Figure 2 As shown, a connecting mechanism of a foam supply trailer is disclosed, wherein the inner wall of the foam storage tank 2 is fixedly connected to a box body 4, and a piston head 5 is slidably connected in the box body 4, a pull rod 6 is fixedly connected to the piston head 5, a rotating plate 9 is fixedly connected to the output end of the driving motor 3, and the rotating plate 9 and the pull rod 6 are connected by a connecting mechanism, the top end of the pull rod 6 extends through the box body 4, and the pull rod 6 is slidably connected to the box body 4, the connecting mechanism includes a fixing member 7, a straight groove 701 and a movable rod 8, the fixing member 7 is fixedly connected to the protruding end of the pull rod 6, and a straight groove 701 is opened in the fixing member 7, the movable rod 8 is slidably arranged in the straight groove 701, and the end of the movable rod 8 away from the straight groove 701 is fixedly connected to the rotating plate 9.

[0028] In this technical solution, Figure 1 As shown, the technical solution utilizes the setting of the fixing part 7, the straight groove 701, the movable rod 8 and the rotating plate 9, so that the rotating plate 9 is driven by the driving motor 3 to rotate, thereby driving the movable rod 8 to slide in the straight groove 701 through the rotating plate 9, and the movable rod 8 will push the fixing part 7 to reciprocate up and down, which can quickly absorb the gas generated by the foam crushing and re-transport it into the solution, increase the amount of foam generated, and improve the fire extinguishing effect.

[0029] Its use is as Figure 2 The technical solution shown is, first turn on the driving motor 3, the driving motor 3 will drive the rotating plate 9 to rotate, and the rotating plate 9 will drive the movable rod 8 to rotate synchronously when rotating, and then the movable rod 8 will slide along the straight groove 701, so that the fixing part 7 will move up and down, at this time the fixing part 7 will push the pull rod 6 to move up and down, so that the pull rod 6 slides up and down along the inner wall of the box body 4, and further the pull rod 6 will drive the piston head 5 to move up and down, so that the gas generated by the foam breaking is sucked into the box body 4, and then re-delivered to the liquid through the air outlet 402 at the bottom of the box body 4, so that it is re-mixed with the solution, thereby generating new foam.

[0030] Embodiment 3: The technical content disclosed in this embodiment is a further improvement made on the basis of the above-mentioned embodiments 1 and 2. When the trailer is moving, affected by external environmental factors, the foam in the foam storage tank on the trailer will be broken after being violently impacted, and the gas in the foam will escape, so that its ability to isolate oxygen will be weakened, thereby reducing the fire extinguishing effect. In order to further solve this technical problem, the technical solution of this invention is as follows: Figure 3 and Figure 4 As shown, a negative pressure mechanism of a foam supply trailer is disclosed, wherein a side wall of a box body 4 is fixedly connected with an air inlet pipe 10, and an air outlet 402 communicating with the air inlet pipe 10 is provided on the side wall of the box body 4, a rubber block 11 is fixedly connected to the top of the air inlet pipe 10, and a first blocking plate 14 is slidably connected in the air inlet pipe 10, and an air inlet hole 1401 is provided on the first blocking plate 14, an air outlet pipe 12 is fixedly connected to the bottom end of the box body 4, and an air outlet 402 communicating with the air outlet pipe 12 is provided at the bottom end of the box body 4, and a second blocking plate 17 is provided in the air outlet pipe 12 below the air outlet 402, a bottom plate 15 is fixedly connected to the inner wall of the foam storage tank 2 below the second blocking plate 17, the first blocking plate 14 is aligned with the air outlet 402, and the first blocking plate 14 is The diameter is larger than the diameter of the air outlet 402, and a tension spring 13 is connected between the first sealing plate 14 and the air inlet pipe 10, and an elastic telescopic structure is formed between the first sealing plate 14 and the air inlet pipe 10 through the tension spring 13, the air inlet hole 1401 is aligned with the rubber block 11, and the air inlet hole 1401 is consistent with the rubber block 11, the second sealing plate 17 is slidably connected to the air outlet pipe 12, and the second sealing plate 17 is aligned with the air outlet 402, and the diameter of the second sealing plate 17 is larger than the diameter of the air outlet 402, the upper end of the bottom plate 15 is fixedly connected with a compression spring 16, and the end of the compression spring 16 away from the bottom plate 15 extends into the air outlet pipe 12 and is fixedly connected to the bottom end of the second sealing plate 17, and the bottom end of the air outlet pipe 12 does not contact the inner wall of the foam storage tank 2.

[0031] In this technical solution, Figure 3 As shown, the technical solution utilizes the setting of the first sealing plate 14 and the second sealing plate 17, so that when the piston head 5 moves upward, the second sealing plate 17 will fit with the air outlet 402, so that the first sealing plate 14 moves under the action of pressure to open the air inlet 401. At the same time, when the piston head 5 moves downward, the second sealing plate 17 will open, and the first sealing plate 14 will seal the air inlet 401, and the stored gas will be re-discharged into the solution. The structure is simple and easy to maintain, and new foam can be quickly generated, thereby reducing the speed of foam melting and improving the fire extinguishing efficiency.

[0032] Its use is as Figure 4According to the technical solution shown in the figure, first, the second blocking plate 17 will be tightly attached to the air outlet 402 under the elastic force of the compression spring 16, and then the piston head 5 will move upward under the action of the pull rod 6, so that the pressure in the box body 4 is lower than the external pressure. When the piston head 5 moves above the air inlet 401, the first blocking plate 14 in the air inlet pipe 10 will slide along the inner wall of the air inlet pipe 10 under the action of the pressure, thereby stretching the tension spring 13 and approaching the air inlet 401. At the same time, the air inlet hole 1401 will be separated from the rubber block 11, so that the external gas will enter the box body 4 through the air inlet hole 1401, thereby making the box body 4 The air pressure in the body 4 is balanced with the external air pressure. When the air pressure is balanced, the tension spring 13 will drive the first sealing plate 14 to reset and move, so that the air inlet 1401 is aligned with the rubber block 11 to seal and block the external gas from entering. When the piston head 5 moves downward, the piston head 5 will push the gas to be squeezed and gathered at the air outlet 402, thereby squeezing the second sealing plate 17, so that the second sealing plate 17 squeezes the compression spring 16 to contract, open the air outlet 402, and allow the gas to be re-delivered from the air outlet pipe 12 to the liquid in the foam storage tank 2, and so on and so forth, thereby expanding the coverage area and duration of the foam.

[0033] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foam supply trailer, comprising a trailer body (1), wherein a foam storage tank (2) is fixedly connected to the upper end of the trailer body (1), and a driving motor (3) is fixedly connected to the side wall of the foam storage tank (2); It is characterized in that Also includes: The inner wall of the foam storage tank (2) is fixedly connected to a box body (4), and a piston head (5) is slidably connected inside the box body (4), a pull rod (6) is fixedly connected to the piston head (5), and a rotating plate (9) is fixedly connected to the output end of the drive motor (3), and the rotating plate (9) and the pull rod (6) are connected via a connecting mechanism; An air inlet pipe (10) is fixedly connected to the side wall of the box body (4), and an air outlet (402) communicating with the air inlet pipe (10) is provided on the side wall of the box body (4); a rubber block (11) is fixedly connected to the top of the air inlet pipe (10), and a first sealing plate (14) is slidably connected to the air inlet pipe (10), and an air inlet hole (1401) is provided on the first sealing plate (14); an air outlet pipe (12) is fixedly connected to the bottom end of the box body (4), and an air outlet (402) communicating with the air outlet pipe (12) is provided on the bottom end of the box body (4), and a second sealing plate (17) is provided in the air outlet pipe (12) below the air outlet (402), and a bottom plate (15) is fixedly connected to the inner wall of the foam storage tank (2) below the second sealing plate (17).

2. The foam supply trailer according to claim 1, characterized in that: The top end of the pull rod (6) extends through the box body (4), and the pull rod (6) is slidably connected to the box body (4).

3. The foam supply trailer according to claim 1, characterized in that: The connecting mechanism comprises a fixing member (7), a straight groove (701) and a movable rod (8); the fixing member (7) is fixedly connected to the protruding end of the pull rod (6), and a straight groove (701) is provided in the fixing member (7); the movable rod (8) is slidably arranged in the straight groove (701), and one end of the movable rod (8) away from the straight groove (701) is fixedly connected to the rotating plate (9).

4. The foam supply trailer according to claim 1, characterized in that: The first blocking plate (14) is aligned with the air outlet (402), and the diameter of the first blocking plate (14) is larger than the diameter of the air outlet (402), and a tension spring (13) is connected between the first blocking plate (14) and the air inlet pipe (10), and an elastic telescopic structure is formed between the first blocking plate (14) and the air inlet pipe (10) through the tension spring (13).

5. The foam supply trailer according to claim 1, characterized in that: The air inlet hole (1401) is aligned with the rubber block (11), and the air inlet hole (1401) matches the rubber block (11).

6. The foam supply trailer according to claim 1, characterized in that: The second sealing plate (17) is slidably connected to the air outlet pipe (12), the second sealing plate (17) is aligned with the air outlet (402), and the diameter of the second sealing plate (17) is greater than the diameter of the air outlet (402).

7. The foam supply trailer according to claim 1, characterized in that: The upper end of the bottom plate (15) is fixedly connected to a compression spring (16), and one end of the compression spring (16) away from the bottom plate (15) extends into the air outlet pipe (12) and is fixedly connected to the bottom end of the second blocking plate (17), and the bottom end of the air outlet pipe (12) does not contact the inner wall of the foam storage tank (2).

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