Cut-off device for fire hose

Abstract

A cut-off device for a fire hose comprises an upper mounting seat and a lower rotating seat, one side of the lower end of the upper mounting seat is rotationally connected with one side of the upper end of the lower rotating seat through a rotating shaft, and the other side of the lower end of the upper mounting seat is connected with the other side of the upper end of the lower rotating seat through a quick bolt; an upper notch is formed in the lower surface of the upper mounting seat, a lower notch is formed in the upper surface of the lower rotating seat, the upper notch and the lower notch correspond to each other to form a fire hose placement channel, a sliding groove is formed in the middle of the upper mounting seat, a closure pressing block is slidably connected into the sliding groove, and the lower end face of the closure pressing block is matched with the lower notch; an adjusting screw is connected to the middle of the cut-off pressing block through threads, a rotating shaft is coaxially arranged at the upper end of the adjusting screw, and the upper end of the rotating shaft penetrates out of the top face of the upper mounting base and is connected with an operating handle. According to the utility model, the defects in the prior art are overcome, the operation difficulty can be greatly reduced, and the closure control accuracy is improved; and the leakage problem caused by uneven pressure in the use process of the water hose is avoided.

Description

A flow cutter for fire hoses Technical Field

[0001] This utility model relates to the field of fire-fighting equipment technology, specifically to a flow cutter for fire hoses. Background Technology

[0002] During firefighting operations, water supply strategies must be quickly adjusted according to changes in the fire situation (such as the direction of flame spread or the relocation of key areas). For example, when firefighters need to move the water hose position or change the water hose, the water flow needs to be cut off to prevent the hose from swinging out of control or the joints from coming loose due to continuous water flow when dragging the hose.

[0003] Currently, most firefighters change fire hoses by forcefully bending the hose with both hands and pressing it down with their knees to stop the water flow before proceeding with the replacement. Due to water pressure, bending is laborious and time-consuming. This method is not only inefficient but also prone to hose damage and may even cause safety accidents due to improper operation, affecting firefighting efficiency. Existing flow cutters, such as the design of the patented "Water Cut-off Clamps" (CN90209785.7), primarily utilize hinge and linkage mechanics. By manually pressing down on the upper jaws, point B moves downwards, causing point A to move upwards, and the upper jaws move downwards again, flattening the hose to stop the water flow. However, because fire hoses have high water pressure, this requires considerable effort to operate and is prone to leaks due to pressure fluctuations, making it difficult to respond quickly to changes in the fire situation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this utility model provides a flow cutter for fire hoses, which overcomes the deficiencies of existing technologies, has a reasonable design, can greatly reduce the difficulty of operation, and improve the accuracy of flow cutter control; it also avoids leakage problems caused by uneven pressure during the use of fire hoses.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A flow cutter for fire hoses includes an upper mounting base and a lower rotating base. One lower end of the upper mounting base is rotatably connected to one upper end of the lower rotating base via a pivot shaft. The other lower end of the upper mounting base is connected to the other upper end of the lower rotating base via a quick-release pin. The lower surface of the upper mounting base has an upper recess, and the upper surface of the lower rotating base has a lower recess. The upper and lower recesses correspond to each other to form a fire hose placement channel.

[0007] The upper mounting base has a sliding groove in the middle, and a flow-blocking pressure block is slidably connected in the sliding groove. The lower end face of the flow-blocking pressure block cooperates with the lower recess. An adjusting screw is threadedly connected to the middle of the flow-blocking pressure block. A rotating shaft is coaxially provided at the upper end of the adjusting screw. The upper end of the rotating shaft passes through the top surface of the upper mounting base and is connected to the operating handle.

[0008] Preferably, the lower end face of the flow-blocking block includes a first inclined surface, a circular arc surface, and a second inclined surface. The first inclined surface and the second inclined surface are arranged in a triangular structure, and the first inclined surface and the second inclined surface are connected by a circular arc surface.

[0009] Preferably, the thickness of the lower end face of the flow-blocking block is between 4 mm and 7 mm.

[0010] Preferably, the thickness of the lower end face of the flow-blocking pressure block is 5 mm.

[0011] Preferably, the flow-blocking block includes a lower flow-blocking block and an upper spiral block, which are fixed together by bolts. The lower flow-blocking block has a through hole with an open top in the middle, and the upper spiral block has a threaded post that runs vertically through the middle. The threaded post is corresponding to the through hole, and the adjusting screw is threadedly connected to the threaded post.

[0012] Preferably, the lower interceptor block has several hollow holes in the middle.

[0013] Preferably, a ball bearing is rotatably connected to the outer surface of the rotating shaft, and the outer surface of the ball bearing is fixedly installed in the upper mounting base.

[0014] Preferably, the upper end of the rotating shaft extends through the top surface of the upper mounting base and is provided with a square block, which is connected to the operating handle through a slot.

[0015] This utility model provides a flow cutter for fire hoses, which has the following advantages: the upper mounting base and the lower rotating base can be rotated and opened around a pivot, making it easy to place the fire hose into the channel formed by the upper and lower recesses. A quick-lock pin locks the upper mounting base and the lower rotating base, thus confining the fire hose within the channel. Furthermore, by converting the downward pressure of the flow-cutting block on the fire hose into the rotational force of the operating handle, the operation difficulty is greatly reduced, the accuracy of flow control is improved, and leakage caused by uneven pressure during hose use is effectively avoided, ensuring the efficiency and safety of firefighting operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0017] Figure 1. Schematic diagram of the structure of this utility model;

[0018] Figure 2. Partial cross-sectional schematic diagram of this utility model;

[0019] Explanation of the labels in the diagram:

[0020] 1. Upper mounting base; 2. Lower rotating base; 3. Quick-release pin; 4. Upper recess; 5. Lower recess; 6. Sliding groove; 7. Flow-stopping block; 9. Adjusting screw; 10. Rotating shaft; 11. Operating handle; 12. Ball bearing; 13. Square block; 71. Lower flow-stopping block; 72. Upper spiral block; 73. Threaded hole post; 74. Hollow hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0022] Example 1, as shown in Figures 1-2, includes a flow cutter for fire hoses, comprising an upper mounting base 1 and a lower rotating base 2. One side of the lower end of the upper mounting base 1 is rotatably connected to one side of the upper end of the lower rotating base 2 via a pivot shaft. The other side of the lower end of the upper mounting base 1 is connected to the other side of the upper end of the lower rotating base 2 via a quick-release pin 3. An upper recess 4 is provided on the lower surface of the upper mounting base 1, and a lower recess 5 is provided on the upper surface of the lower rotating base 2. The upper recess 4 and the lower recess 5 correspond to each other to form a fire hose placement channel.

[0023] The upper mounting base 1 has a sliding groove 6 in the middle, and a flow-blocking pressure block 7 is slidably connected in the sliding groove 6. The lower end face of the flow-blocking pressure block 7 cooperates with the lower recess 5. An adjusting screw 9 is threadedly connected in the middle of the flow-blocking pressure block 7. A rotating shaft 10 is coaxially provided at the upper end of the adjusting screw 9. The upper end of the rotating shaft 10 passes through the top surface of the upper mounting base 1 and is connected to the operating handle 11.

[0024] Working principle:

[0025] In practical use, firstly, the quick-release pin 3 is pulled out, allowing the upper mounting base 1 and the lower rotating base 2 to rotate and open around the pivot, thus facilitating the placement of the fire hose into the channel formed by the upper recess 4 and the lower recess 5. After placing the fire hose into the channel, the upper mounting base 1 and the lower rotating base 2 are rotated and closed again, and the quick-release pin 3 is used to lock the upper mounting base 1 and the lower rotating base 2. This confines the fire hose within the channel.

[0026] Then, by rotating the operating handle 11, the adjusting screw 9 is rotated. Through the threaded connection between the adjusting screw 9 and the intercepting pressure block 7, the rotational motion of the adjusting screw 9 is converted into the up-and-down movement of the intercepting pressure block 7. This causes the intercepting pressure block 7 to move downwards gradually within the sliding groove 6, thereby gradually compressing the fire hose through the lower end face of the intercepting pressure block 7. Finally, through the interaction between the intercepting pressure block 7 and the recess 5, the interception control effect of the fire hose is achieved.

[0027] This invention converts the downward pressure of the intercepting block 7 on the fire hose into the rotational force of the operating handle 11, which greatly saves the operator's physical strength. This not only greatly reduces the difficulty of operation, but also improves the accuracy of interception control, effectively avoiding leakage problems caused by uneven pressure during the use of the hose, and ensuring the efficiency and safety of fire fighting operations.

[0028] In Example 2, as a further preferred embodiment of Example 1, the lower end face of the flow-blocking pressure block 7 includes a first inclined surface, an arc surface, and a second inclined surface. The first and second inclined surfaces are arranged in a triangular structure, and are connected by an arc surface. The triangular arc surface structure formed by the first inclined surface, arc surface, and second inclined surface effectively reduces the contact area between the flow-blocking pressure block 7 and the fire hose, thereby effectively reducing the downward pressure of the flow-blocking pressure block 7 and consequently reducing the torque of the adjusting screw 9.

[0029] In Example 3, as a further preferred embodiment of Example 2, the thickness of the lower end face of the flow-blocking block 7 is between 4mm and 7mm. This allows the flow-blocking block 7 to maintain its strength while reducing the contact area between the flow-blocking block 7 and the fire hose, thereby further reducing the torque of the adjusting screw 9. More specifically, in this embodiment, the thickness of the lower end face of the flow-blocking block 7 is set to 5mm.

[0030] In Example 4, as a further preferred embodiment of Example 1, the flow-blocking block 7 includes a lower flow-blocking block 71 and an upper spiral block 72. The lower flow-blocking block 71 and the upper spiral block 72 are fixed together by bolts. The lower flow-blocking block 71 has a through hole with an open upper end in the middle, and the upper spiral block 72 has a threaded post 73 that runs vertically through the middle. The threaded post 73 is correspondingly arranged to the through hole, and the adjusting screw 9 is threadedly connected to the threaded post 73. Through the threaded connection between the threaded post 73 in the middle of the upper spiral block 72 and the adjusting screw 9, sufficient relative displacement distance can be achieved between the adjusting screw 9 and the flow-blocking block 7. This ensures the rotational accuracy of the adjusting screw 9 while further optimizing the smooth movement of the flow-blocking block 7, ensuring the stability and safety of the fire hose during the flow-blocking process.

[0031] In Example 5, as a further preferred embodiment of Example 1, the lower intercepting block 71 has several hollow holes 74 in the middle. By creating the hollow holes 74, the overall structural weight is reduced, operational flexibility is improved, rapid response is ensured in emergency situations, and the interception and control effect of the fire hose is effectively enhanced.

[0032] In Example 6, as a further preferred embodiment of Example 1, a ball bearing 12 is rotatably connected to the outer surface of the rotating shaft 10, and the outer surface of the ball bearing 12 is fixedly installed in the upper mounting base 1. By setting the ball bearing 12, the smoothness of the rotation of the adjusting screw 9 can be ensured, the rotational frictional resistance of the rotating shaft 10 can be reduced, and the moving accuracy and stability of the intercepting pressure block 7 can be further improved, ensuring that a reliable intercepting effect can still be maintained under the impact of high-pressure water flow.

[0033] In embodiment seven, as a further preferred embodiment one, the upper end of the rotating shaft 10 extends through the top surface of the upper mounting base 1 and is provided with a square block 13. The square block 13 is connected to the operating handle 11 through a slot. The square block 13 enables a quick and stable connection between the rotating shaft 10 and the operating handle 11, ensuring that the operating handle 11 will not slip or wobble during rotation.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A flow cutter for fire hoses, characterized in that: It includes an upper mounting base (1) and a lower rotating base (2). The lower end of the upper mounting base (1) is rotatably connected to the upper end of the lower rotating base (2) via a rotating shaft. The other lower end of the upper mounting base (1) is connected to the other upper end of the lower rotating base (2) via a quick-release pin (3). The lower surface of the upper mounting base (1) has an upper recess (4), and the upper surface of the lower rotating base (2) has a lower recess (5). The upper recess (4) and the lower recess (5) correspond to each other to form a fire-resistant structure. The water hose placement channel has a sliding groove (6) in the middle of the upper mounting base (1). A flow-blocking pressure block (7) is slidably connected in the sliding groove (6). The lower end face of the flow-blocking pressure block (7) cooperates with the lower recess (5). An adjusting screw (9) is threadedly connected in the middle of the flow-blocking pressure block (7). A rotating shaft (10) is coaxially provided at the upper end of the adjusting screw (9). The upper end of the rotating shaft (10) passes through the top surface of the upper mounting base (1) and is connected to the operating handle (11).

2. A flow cutter for fire hoses according to claim 1, characterized in that: The lower end face of the flow-blocking block (7) includes a first inclined surface, a circular arc surface, and a second inclined surface. The first inclined surface and the second inclined surface are arranged in a triangular structure, and the first inclined surface and the second inclined surface are connected by a circular arc surface.

3. A flow cutter for fire hoses according to claim 2, characterized in that: The thickness of the lower end face of the flow-blocking block (7) is between 4 mm and 7 mm.

4. A flow cutter for fire hoses according to claim 2, characterized in that: The thickness of the lower end face of the flow-blocking pressure block (7) is 5mm.

5. A flow cutter for fire hoses according to claim 1, characterized in that: The flow-blocking block (7) includes a lower flow-blocking block (71) and an upper spiral block (72). The lower flow-blocking block (71) and the upper spiral block (72) are fixed together by bolts. The lower flow-blocking block (71) has a through hole with an open upper end in the middle. The upper spiral block (72) has a threaded hole column (73) that runs vertically through the middle. The threaded hole column (73) is set in correspondence with the through hole. The adjusting screw (9) is threadedly connected to the threaded hole column.

6. A flow cutter for fire hoses according to claim 5, characterized in that: The lower interceptor block (71) has several hollow holes (74) in the middle.

7. A flow cutter for fire hoses according to claim 1, characterized in that: The outer surface of the rotating shaft (10) is rotatably connected to a ball bearing (12), and the outer surface of the ball bearing (12) is fixedly installed in the upper mounting base (1).

8. A flow cutter for fire hoses according to claim 1, characterized in that: The upper end of the rotating shaft (10) extends through the top surface of the upper mounting base (1) and is provided with a square block (13). The square block (13) is connected to the operating handle (11) through a slot.

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