Fire-fighting lance convenient to adjust

Abstract

The fire-fighting lance convenient to adjust comprises a water spraying shell, a middle cavity with openings in the front side and the rear side is formed in the water spraying shell, a power cavity is formed in the upper end wall of the middle cavity, a power motor is fixedly arranged on the front end wall of the power cavity, the power motor is in power connection with a power shaft, the front end of the power shaft penetrates through the water spraying shell, and the power shaft is fixedly connected with a power wheel. The side wall of the power wheel is fixedly connected with four connecting rods distributed in the circumferential direction, the four connecting rods are connected with a first spray head, a fourth spray head, a third spray head and a second spray head correspondingly, and the cross sectional areas of through holes formed in the first spray head, the fourth spray head, the third spray head and the second spray head are gradually increased. A power motor drives a power shaft, a power wheel and a connecting rod to rotate, then a first spray head, a fourth spray head, a third spray head and a second spray head are switched, the water outlet pressure and water amount are adjusted, and then the distance and water amount of water spraying during fire extinguishing are controlled; and a user can conveniently and simply know the pressure and the flow when the current water flow is sprayed out.

Description

Technical Field

[0001] The utility model relates to the field of firefighting, in particular to a firefighting water gun which is convenient to adjust. Background Art

[0002] Fire hoses are commonly used long-distance fire-fighting tools in fire-fighting equipment. When the fire hose is in use, the volume of the internal flow pipe of the hose is fixed, so the amount of water sprayed by the fire hose is fixed and cannot be adjusted according to demand during use. Therefore, it is inconvenient to adjust the water pressure and water output, and it is not convenient to extinguish fires at different distances. Moreover, when in use, the water is gradually sprayed out, which can easily cause water to be sprayed in places where water is not needed, and it is inconvenient for users to control. Utility Model Content

[0003] The purpose of the utility model is to provide a fire hose nozzle which is convenient to adjust, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fire-fighting water gun which is convenient to adjust, comprising a water spray shell, wherein a middle cavity with front and rear side openings is provided in the water spray shell, a power cavity is provided in the upper end wall of the middle cavity, a power motor is fixedly provided on the front end wall of the power cavity, the power motor is connected to a power shaft with a front end penetrating the water spray shell, the power shaft is fixedly connected to a power wheel, and four circumferentially distributed connecting rods are fixedly connected to the side wall of the power wheel, and the four connecting rods are respectively and detachably fixedly connected to a first nozzle, a fourth nozzle, a third nozzle and a second nozzle, and the cross-sectional areas of the through holes provided in the first nozzle, the fourth nozzle, the third nozzle and the second nozzle gradually increase;

[0005] The first nozzle, the fourth nozzle, the third nozzle and the second nozzle are all slidably connected to the water spray shell, and the water flow in the middle cavity can be sprayed out through the through holes in the first nozzle, the fourth nozzle, the third nozzle and the second nozzle. The power shaft is driven to rotate by the power motor, and then the power wheel and the connecting rod are rotated, thereby switching the first nozzle, the fourth nozzle, the third nozzle and the second nozzle to be connected to the middle cavity, so that the water outlet area is different, thereby adjusting the water outlet pressure and water volume.

[0006] The left and right side walls of the power chamber are fixedly provided with a power commutator connected to the power shaft; the upper end of the power commutator is connected to a driven shaft whose upper end passes through the water spray shell; a display panel is fixed to the upper end surface of the driven shaft; four marks are provided on the display panel; when the first nozzle, the fourth nozzle, the third nozzle and the second nozzle are replaced by the rotation of the power shaft, the display panel rotates accordingly, and the marks on the display panel are convenient for the user to know the current water pressure and water volume of the water spray.

[0007] The front end surface of the water spray shell is fixedly connected with a connecting tube, and a connecting cavity with a front opening communicating with the middle cavity is arranged in the connecting tube.

[0008] The front end surface of the connecting cylinder is fixedly connected with a control cylinder, and a control cavity which is in communication with the connecting cavity and has an opening at the front side is arranged in the control cylinder.

[0009] The side wall of the connecting cavity is fixedly connected to a fixed plate through the four fixing rods, the control cylinder is slidably connected to a sliding plate, an elastic guide rod is provided between the fixed plate and the sliding plate, the elastic guide rod is contracted under force, and can drive the sliding plate to enter the connecting cavity, at which time the control cavity is connected to the intermediate cavity.

[0010] The outer wall of the control cylinder is threadedly connected with a threaded connection sleeve, and the front side of the threaded connection sleeve is threadedly connected with a water inlet pipe, and the water inlet pipe can be connected to an external water pump.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model can support the sliding plate through the fixed plate, elastic guide rod and sliding plate. When the sliding plate is located in the control cavity in the control cylinder, the sliding plate can block the connection between the control cavity and the connecting cavity. At this time, the water flow cannot enter the connecting cavity and the middle cavity to be sprayed. Only when the water flow pressure is sufficient can the sliding plate be pushed into the connecting cavity and the elastic guide rod be compressed. At this time, the water flow can be sprayed normally, avoiding the situation of water flow waste.

[0013] The first nozzle, the second nozzle, the third nozzle and the fourth nozzle can be connected to the water spray shell to control the pressure and flow rate of the water in the middle cavity of the water spray shell when spraying, and then control the distance and amount of water sprayed during fire extinguishing. In addition, the display disk can be rotated as the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are replaced, so that the user can simply understand the current pressure and flow rate of the water spraying. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall three-dimensional schematic diagram of a fire-fighting water gun that is easy to adjust is proposed in the utility model;

[0015] Figure 2 A three-dimensional schematic diagram of a fire-fighting water gun that is convenient to adjust, as proposed in the utility model;

[0016] Figure 3 A three-dimensional top view schematic diagram of a fire-fighting water gun that is easy to adjust proposed in the utility model;

[0017] Figure 4A schematic diagram of the internal structure of a fire-fighting water gun that is convenient to adjust proposed in the utility model;

[0018] Figure 5 for Figure 4 Right view of;

[0019] In the figure: 101, water spray shell; 102, middle cavity; 103, power cavity; 104, power motor; 105, power shaft; 106, power wheel; 107, connecting rod; 108, first nozzle; 109, second nozzle; 111, third nozzle; 112, fourth nozzle; 114, power commutator; 115, driven shaft; 116, display panel; 117, connecting tube; 118, connecting cavity; 119, fixing rod; 121, fixing plate; 122, elastic guide rod; 123, control tube; 124, control cavity; 125, sliding plate; 126, threaded connecting sleeve; 127, water inlet pipe. DETAILED DESCRIPTION

[0020] 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. Example

[0021] See also Figure 1-5 The utility model provides a technical solution: a fire-fighting water gun that is easy to adjust, comprising a water spray shell 101, wherein the water spray shell 101 is provided with an intermediate cavity 102 with front and rear side openings, wherein the upper end wall of the intermediate cavity 102 is provided with a power cavity 103, wherein the front end wall of the power cavity 103 is fixedly provided with a power motor 104, wherein the power motor 104 is connected to a power shaft 105 with a front end penetrating the water spray shell 101, wherein the power shaft 105 is fixedly connected to a power wheel 106, wherein the side wall of the power wheel 106 is fixedly connected with four circumferentially distributed connecting rods 107, wherein the four connecting rods 107 are respectively and detachably fixedly connected with a first nozzle 108, a fourth nozzle 112, a third nozzle 111 and a second nozzle 109, wherein the cross-sectional areas of the through holes provided in the first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109 are gradually increased;

[0022] The first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109 are all slidably connected to the water spray shell 101, and the water flow in the middle cavity 102 can be sprayed out through the through holes in the first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109. The power shaft 105 is driven to rotate by the power motor 104, and then the power wheel 106 and the connecting rod 107 are rotated, thereby switching the first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109 to be connected to the middle cavity 102, so that the water outlet area is different, thereby adjusting the water outlet pressure and water volume.

[0023] The left and right side walls of the power chamber 103 are fixedly provided with a power commutator 114 that is power-connected to the power shaft 105. The upper end of the power commutator 114 is power-connected to a driven shaft 115 whose upper end passes through the water spray shell 101. A display disk 116 is fixed to the upper end surface of the driven shaft 115. Four marks are provided on the display disk 116. When the first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109 are replaced by the rotation of the power shaft 105, the display disk 116 rotates accordingly. The marks on the display disk 116 are convenient for users to know the current water pressure and water volume of the water spray.

[0024] A connecting tube 117 is fixedly connected to the front end surface of the water spray shell 101 , and a connecting cavity 118 with a front opening communicating with the middle cavity 102 is disposed in the connecting tube 117 .

[0025] A control cylinder 123 is fixedly connected to the front end surface of the connecting cylinder 117 . A control cavity 124 communicating with the connecting cavity 118 and having an opening at the front side is disposed in the control cylinder 123 .

[0026] The side wall of the connecting cavity 118 is fixedly connected to a fixed plate 121 through the four fixed rods 119, and the control cylinder 123 is slidably connected to a sliding plate 125. An elastic guide rod 122 is provided between the fixed plate 121 and the sliding plate 125. The elastic guide rod 122 contracts under force and can drive the sliding plate 125 to enter the connecting cavity 118. At this time, the control cavity 124 is connected to the intermediate cavity 102.

[0027] The outer wall of the control cylinder 123 is threadedly connected with a threaded connection sleeve 126 , and the front side of the threaded connection sleeve 126 is threadedly connected with a water inlet pipe 127 , and the water inlet pipe 127 can be connected to an external water pump.

[0028] Working principle:

[0029] When in use, connect the water inlet pipe 127 to the water pump, and then before starting the water pump, align the middle cavity 102 with the fire extinguishing position, start the power motor 104 to drive the power shaft 105 to rotate, and then drive the power wheel 106 and the connecting rod 107 to rotate, and then switch the first nozzle 108, the fourth nozzle 112, the third nozzle 111 and the second nozzle 109 to be connected to the middle cavity 102. According to the distance of the fire extinguishing position and the amount of water required to be discharged, select the first nozzle 108 or the fourth nozzle 112 or the third nozzle 111 or the second nozzle 109 connected to the middle cavity 102, and then adjust the pressure and amount of water discharged;

[0030] Then the water pump is turned on, and water enters the control chamber 124 through the water inlet pipe 127. At this time, due to the obstruction of the sliding plate 125, water will not be sprayed immediately, but the water inlet pipe 127 is filled with water. When the water pressure is sufficient, the sliding plate 125 is pushed to compress the elastic guide rod 122 to approach the second nozzle 109. At this time, the sliding plate 125 enters the connecting chamber 118 and sprays through the middle chamber 102 and the first nozzle 108 or the fourth nozzle 112 or the third nozzle 111 or the second nozzle 109, so as to avoid the situation where water with insufficient water pressure is slowly sprayed out after the water pump is started;

[0031] After the fire is extinguished, the water pump is turned off. At this time, the water pressure in the water inlet pipe 127 is insufficient. Under the elastic force of the elastic guide rod 122, the sliding plate 125 is reset to disconnect the water inlet pipe 127 from the connecting chamber 118, avoiding the situation where the water flow slowly sprays out until the residual water is sprayed out after the water pump is turned off.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire hose gun that is easy to adjust, characterized by: The invention comprises a water spray shell (101), wherein a middle cavity (102) with front and rear openings is arranged in the water spray shell (101), a power cavity (103) is arranged in the upper end wall of the middle cavity (102), a power motor (104) is fixedly arranged on the front end wall of the power cavity (103), the power motor (104) is connected to a power shaft (105) whose front end passes through the water spray shell (101), the power shaft (105) is fixedly connected to a power wheel (106), and the side wall of the power wheel (106) is fixedly connected to four circumferentially distributed connecting rods (107), the four connecting rods (107) are respectively and detachably fixedly connected to a first spray head (108), a fourth spray head (112), a third spray head (111) and a second spray head (109), and the cross-sectional areas of the through holes arranged in the first spray head (108), the fourth spray head (112), the third spray head (111) and the second spray head (109) gradually increase; The first spray head (108), the fourth spray head (112), the third spray head (111) and the second spray head (109) are all slidably connected to the water spray shell (101).

2. A conveniently adjustable fire-fighting water gun according to claim 1, characterized in that: A power commutator (114) connected to the power shaft (105) is fixedly provided on the left and right side walls of the power chamber (103); the upper end of the power commutator (114) is connected to a driven shaft (115) whose upper end passes through the water spray shell (101); a display panel (116) is fixed to the upper end surface of the driven shaft (115); and four marks are provided on the display panel (116).

3. A conveniently adjustable fire-fighting water gun according to claim 2, characterized in that: The front end surface of the water spray shell (101) is fixedly connected to a connecting tube (117), and a connecting cavity (118) with a front opening communicating with the middle cavity (102) is provided in the connecting tube (117).

4. The conveniently adjustable fire-fighting water gun according to claim 3, characterized in that: The front end surface of the connecting cylinder (117) is fixedly connected to a control cylinder (123), and a control cavity (124) which is in communication with the connecting cavity (118) and has an opening at the front side is provided in the control cylinder (123).

5. The conveniently adjustable fire-fighting water gun according to claim 4, characterized in that: The side wall of the connecting cavity (118) is fixedly connected to a fixed plate (121) via four fixed rods (119); the control cylinder (123) is slidably connected to a sliding plate (125); and an elastic guide rod (122) is provided between the fixed plate (121) and the sliding plate (125).

6. The conveniently adjustable fire-fighting water gun according to claim 5, characterized in that: The outer wall of the control cylinder (123) is threadedly connected to a threaded connection sleeve (126), and the front side of the threaded connection sleeve (126) is threadedly connected to a water inlet pipe (127).

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