Exhaust device applied to water suction port of fire fighting truck

Abstract

The invention relates to an exhaust device applied to a water suction port of a fire fighting truck, and belongs to the technical field of exhaust equipment. The exhaust device comprises an automatic exhaust valve and a blank cap installed on a water outlet connector of the fire fighting truck, and the automatic exhaust valve is detachably connected with the blank cap. The automatic exhaust valve is arranged and used for releasing additional impact of air resistance in the blank cap on a fire-fighting vehicle, a water suction pipeline of the fire-fighting vehicle is protected, air in the blank cap can be released under the condition that the blank cap is not disassembled, personal injury is avoided, operation is convenient, and safety and reliability are achieved.

Description

Technical Field

[0001] This invention relates to an exhaust device used at the water intake of a fire truck, belonging to the field of exhaust equipment technology. Background Technology

[0002] Fire trucks use onboard fire pumps to pressurize water, which is then sprayed through the onboard boom to cool targets and extinguish flames. During the operation of the fire pump, a small amount of gas may be introduced, which can accumulate in blind spots such as the suction cap. Because some aerial ladder fire trucks have high booms, improper operation during the discharge of residual water after use can cause air to be squeezed and accumulated in the water supply line due to atmospheric pressure and inertia. This can cause blind spots to be subjected to extreme pressure, which can easily damage equipment, affect the normal use of the vehicle, and endanger the safety of operators. To avoid this, pressure relief devices need to be added to the water supply line.

[0003] During the venting and depressurization process, an venting valve is required. Chinese Utility Model Patent Publication No. CN212226170U discloses a push-button manual venting valve, including a valve body with an input end and an output end. The input end and output end are connected by a channel. A sealing element is installed in the input end to seal it, and a push-button element is installed in the output end. This push-button manual venting valve uses a combination of a push-button element and a spring to control the position of the sealing element. In use, pressing the push-button element controls the venting valve to release air, making it more convenient and eliminating the cumbersome operation of traditional venting valves, thus improving the user experience.

[0004] Chinese Utility Model Patent Publication No. CN208487255U discloses a 360-degree rotary manual exhaust valve for rapid discharge. The valve includes a valve body, an air inlet at the lower part of the valve body, and a sealing hole at the upper part of the valve body. The air inlet and the sealing hole are interconnected. A matching sealing screw is screwed into the sealing hole, with its upper end extending out of the sealing hole and connected to a handwheel. An annular rotating groove is provided on the outer wall of the valve body. A matching rotating pipe is installed within the rotating groove. The rotating pipe is connected to an exhaust pipe that communicates with it. Several evenly distributed vent holes are provided on the upper outer wall of the valve body, with the vent holes aligned with the front end of the exhaust pipe. A fixing plate is located in the middle of the exhaust pipe. This utility model's 360-degree rotary manual exhaust valve allows the exhaust pipe to rotate 360 ​​degrees, adapting to any installation environment and maximizing exhaust efficiency during discharge.

[0005] Chinese Utility Model Patent Publication No. CN206660383U discloses an automatic air release coupling for fire hoses, including a hose coupling and an air release valve. The hose coupling is provided with an air release valve seat, which has an internal thread. The air release valve consists of a valve cap, a valve core, a spring, and a thrust ring, with an external thread on the valve cap. The air release valve is located inside the air release valve seat of the hose coupling, and the external thread of the valve cap on the air release valve engages with the internal thread of the air release valve seat on the hose coupling. This utility model uses an air release valve on the hose coupling. When the water pump starts pressurizing and discharging water, the air in the hose is gradually vented through the air release valve, and the air release valve closes automatically under water pressure. This reduces the air resistance in the hose, accelerates water flow, shortens the water discharge time, and saves valuable time for timely fire extinguishing. This design achieves venting on the fire hose, rather than in the fire truck interface area. Because fire trucks have a compact structure, modifying the pipeline or adding accessories can affect the vehicle's structural dimensions. Therefore, a pressure relief device needs to be installed in a location in the water supply pipeline where air can easily accumulate to reduce the impact of water pressure on the vehicle. Summary of the Invention

[0006] This invention proposes an exhaust device for use at the water intake of a fire truck. Its purpose is to release the additional impact of air resistance inside the cap on the fire truck by setting an automatic exhaust valve. This protects the water intake pipe of the fire truck and can also release the gas inside without removing the cap, avoiding personal injury. It is convenient to operate and safe and reliable.

[0007] The technical solution adopted in this invention is an exhaust device applied at the water intake of a fire truck, including an automatic exhaust valve and a cap installed at the water outlet of the fire truck. The automatic exhaust valve and the cap are detachably connected.

[0008] Furthermore, the cover is provided with a first through hole, the inner wall of the first through hole has internal threads, and the automatic exhaust valve is threadedly connected to the first through hole.

[0009] Furthermore, it also includes a manual vent valve that is detachably connected to the vent cap.

[0010] Furthermore, the cover is provided with a second through hole, the inner wall of the second through hole has internal threads, and the manual exhaust valve is threadedly connected to the second through hole.

[0011] Furthermore, the manual exhaust valve includes a valve body, a valve stem, a ball, a valve seat, a first bearing, a second bearing, and a valve stem. The valve body has a cavity channel for accommodating the valve seat and the ball. The ball is located inside the valve seat. The first bearing and the second bearing are symmetrically arranged on both sides of the ball. The other end of the first bearing is connected to the valve stem, and the other end of the valve stem protrudes out of the valve body.

[0012] Furthermore, the sphere is provided with a through hole.

[0013] Furthermore, a spring is also provided between the valve body and the ball.

[0014] Furthermore, a rotating ring is provided at the other end of the valve stem. By rotating the rotating ring, the valve stem is rotated, thereby adjusting the relative position of the through hole of the ball and the cavity channel.

[0015] Furthermore, the surface of the cap that contacts the manual exhaust valve is provided with angular scale markings for identifying the rotation angle of the valve stem.

[0016] Furthermore, the automatic air vent valve is set with an opening critical pressure value. When the pressure in the fire truck water supply pipeline inside the cover is greater than the opening critical pressure value, the automatic air vent valve starts to compress automatically, the valve opens, the residual gas in the water supply pipeline is discharged, and the pressure in the water supply pipeline is automatically reduced. When the pressure is less than the opening critical pressure value, the automatic air vent valve is in the closed state, and the water supply pipeline supplies water.

[0017] This invention discloses an exhaust device applied to the water intake of a fire truck. Its beneficial effect is that, compared with the prior art, the main function of automatic and manual exhaust valves is to release the accumulated air in the water supply pipeline during the discharge of residual water after the fire truck uses the boom cannon. Due to atmospheric pressure and inertia, the accumulated air in the pipeline is rapidly compressed in blind corners such as caps, causing excessive local pressure and damage to the vehicle. By automatically or manually opening the valve, the accumulated air in the local area can be released to avoid equipment damage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 The figure shown is a front view schematic diagram of the structure of Embodiment 1 of the present invention;

[0020] Figure 2 As shown Figure 1 Structural breakdown diagram;

[0021] Figure 3 As shown Figure 1 Schematic diagram of the manual exhaust valve structure.

[0022] The figure shows: 1. Water outlet; 2. End cap; 3. Manual air vent valve; 4. Automatic air vent valve; 5. First through hole; 6. Second through hole; 10. Valve body; 11. Valve stem; 12. Ball; 13. Valve seat; 14. First bearing; 15. Second bearing; 16. Cavity channel; 17. Through hole; 18. Spring; 19. Rotary ring. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] To further understand the content of this invention, the technical solution will be further described below in conjunction with specific embodiments.

[0025] Example 1: As Figures 1-3 As shown, this embodiment provides an exhaust device for use at the water intake of a fire truck, including an automatic exhaust valve 4 and a cap 2 installed at the water outlet 1 of the fire truck. The automatic exhaust valve 4 and the cap 2 are detachably connected. Specifically, the cap 2 is provided with a first through hole 5, and the inner wall of the first through hole 5 is threaded. The automatic exhaust valve 4 is threadedly connected to the first through hole 5.

[0026] The automatic air release valve 4 is set with an opening critical pressure value. When the pressure in the fire truck water supply pipeline inside the cover 2 is greater than the opening critical pressure value, the automatic air release valve 4 starts to compress automatically, the valve opens, the residual gas in the water supply pipeline is discharged, and the pressure in the water supply pipeline is automatically reduced. When the pressure is less than the opening critical pressure value, the automatic air release valve 4 is in the closed state, and the water supply pipeline supplies water.

[0027] like Figure 3 As shown, the exhaust device further includes a manual exhaust valve 3 that is detachably connected to the cover 2. Specifically, the cover 2 is provided with a second through hole 6, the inner wall of the second through hole 6 is threaded, and the manual exhaust valve 3 is threadedly connected to the second through hole 6.

[0028] Furthermore, the manual exhaust valve 3 includes a valve body 10, a valve stem 11, a ball 12, a valve seat 13, a first bearing 14, a second bearing 15, and a valve stem 11. The valve body 10 has a cavity channel 16 for accommodating the valve seat 13 and the ball 12. The ball 12 is located inside the valve seat 13. The first bearing 14 and the second bearing 15 are symmetrically arranged on both sides of the ball 12. The other end of the first bearing 14 is connected to the valve stem 11, and the other end of the valve stem 11 protrudes out of the valve body 10. The ball 12 has a through hole 17 for air and water passage. The through hole 17 penetrates the center of the ball 12. The diameter of this through hole 17 is related to the flow capacity of the valve body 10. The surface of the ball 12 is smooth so that it can fit well with the valve seat 13.

[0029] In a preferred embodiment of this example, a spring 18 is further provided between the valve body 10 and the ball 12. One end of the spring 18 is connected to the valve body 10, and the other end is fixedly connected to the ball 12. When the manual exhaust valve 3 is in the closed state, the spring 18 applies pressure to the ball 12, causing it to fit tightly against the valve seat 13, thereby achieving a sealing function. The valve seat 13 is typically made of an elastic material, such as rubber, which can fit tightly against the ball 12 and ensure good sealing performance.

[0030] In a preferred embodiment of this example, the other end of the valve stem 11 is provided with a rotating ring 19. The valve stem 11 and the rotating ring 19 are fixedly connected. Rotating the rotating ring 19 drives the valve stem 11 to rotate, and the rotation of the valve stem 11 synchronously drives the ball 12 to rotate, thereby adjusting the relative position of the through hole 17 of the ball 12 and the cavity channel 16. When the through hole 17 of the ball 12 is aligned with the cavity channel 16, the valve is open, and water and air can pass through smoothly. When the ball 12 rotates 90 degrees, making the through hole 17 perpendicular to the cavity channel 16, the valve is closed, cutting off the water and air flow. In both the open and closed states of the manual air release valve 3, the ball 12 must withstand the pressure from the fluid. Its structural strength must meet the pressure requirements of the corresponding pipeline system to ensure the normal use and safety of the manual air release valve 3. Based on the spherical geometry of the ball 12 and the design of the central through hole 17, the ball 12 can rotate freely within the valve body 10. By utilizing its different rotation angles, it can achieve flexible control of the water flow channel, just like a rotatable switch that determines the on / off state of the water flow by changing its own position.

[0031] Furthermore, the surface of the cap 2 that contacts the manual air vent valve 3 is provided with an angle scale marking for identifying the rotation angle of the valve stem 11. The operator can easily change the relative position of the through hole 17 of the ball 12 and the pipeline by observing the angle scale markings, thereby controlling whether water can pass through the manual air vent valve 3 and the flow rate. When the through hole 17 is aligned with the direction of the cavity channel 16, that is, when connected to the water supply pipeline, a smooth water flow channel is formed, realizing the water release function; when the through hole 17 is perpendicular to the direction of the cavity channel 16, the water flow is cut off, serving to close the valve.

[0032] The automatic exhaust valve 4 and the manual exhaust valve 3 are both connected to the end cap 2 by thread. When the exhaust device malfunctions and parts need to be replaced, the threaded structure makes disassembly and assembly simple and easy to maintain.

[0033] In this embodiment, the cover 2 is installed on the outside of the fire truck's water outlet 1, and the automatic air vent valve 4 and the manual air vent valve 3 are connected to the outside of the cover 2 by threads. The main function of the automatic air vent valve 4 and the manual air vent valve 3 is to release the accumulated air in the water supply pipeline during the discharge of residual water after the fire truck uses the boom cannon. Due to atmospheric pressure and inertia, the accumulated air in the water supply pipeline is rapidly compressed in blind corners such as the cover 2, causing excessive local pressure and damage to the vehicle. By automatically or manually opening the air vent, the local accumulated air is released to avoid equipment damage.

[0034] In this embodiment, the critical pressure value for opening the automatic air release valve 4 is set to 0.5 MPa. When the pressure in the fire truck water supply pipeline inside the cap 2 is greater than 0.5 MPa, the automatic air release valve 4 starts to compress automatically, the valve opens, the residual gas in the water supply pipeline is discharged, and the pressure in the water supply pipeline is automatically reduced. When the pressure is less than 0.5 MPa, the automatic air release valve 4 is in the closed state, and the water supply pipeline supplies water normally. When the automatic air release valve 4 malfunctions, or when it is necessary to confirm whether the air release is complete, the operator rotates the valve stem 11 to drive the ball 12 to rotate, changing the relative position of the ball 12 through hole 17 and the cavity channel 16 to control the flow of water. When open, the water can flow through the valve along the ball 12 through hole 17; when closed, the ball 12 cuts off the water flow channel, preventing the water from passing through.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An exhaust device used at the water intake of a fire truck, characterized in that, It includes an automatic air vent valve (4) and a cap (2) installed on the water outlet (1) of the fire truck. The automatic air vent valve (4) and the cap (2) are detachably connected.

2. The exhaust device applied at the water intake of a fire truck according to claim 1, characterized in that, The cover (2) is provided with a first through hole (5), the inner wall of the first through hole (5) is threaded, and the automatic exhaust valve (4) is threadedly connected to the first through hole (5).

3. The exhaust device applied at the water intake of a fire truck according to claim 1, characterized in that, It also includes a manual vent valve (3) that is detachably connected to the cap (2).

4. The exhaust device applied at the water intake of a fire truck according to claim 3, characterized in that, The cover (2) is provided with a second through hole (6), and the inner wall of the second through hole (6) is threaded. The manual exhaust valve (3) is threadedly connected to the second through hole (6).

5. An exhaust device applied at the water intake of a fire truck according to claim 3, characterized in that, The manual exhaust valve (3) includes a valve body (10), a valve stem (11), a ball (12), a valve seat (13), a first bearing (14), a second bearing (15), and a valve stem (11). The valve body (10) is provided with a cavity channel (16) for accommodating the valve seat (13) and the ball (12). The ball (12) is located inside the valve seat (13). The first bearing (14) and the second bearing (15) are symmetrically arranged on both sides of the ball (12). The other end of the first bearing (14) is connected to the valve stem (11), and the other end of the valve stem (11) protrudes out of the valve body (10).

6. The exhaust device applied at the water intake of a fire truck according to claim 5, characterized in that, The sphere (12) has a through hole (17).

7. An exhaust device applied at the water intake of a fire truck according to claim 5, characterized in that, A spring (18) is also provided between the valve body (10) and the ball (12).

8. An exhaust device applied at the water intake of a fire truck according to claim 5, characterized in that, The valve stem (11) is provided with a rotating ring (19) at the other end. By rotating the rotating ring (19), the valve stem (11) is rotated, thereby adjusting the relative position of the through hole (17) of the ball (12) and the cavity channel (16).

9. An exhaust device applied at the water intake of a fire truck according to claim 5, characterized in that, The surface of the cap (2) that contacts the manual exhaust valve (3) is marked with an angle scale for identifying the rotation angle of the valve stem (11).

10. An exhaust device applied at the water intake of a fire truck according to claim 1, characterized in that, The automatic air release valve (4) is set to open critical pressure value. When the pressure of the fire truck water supply pipeline in the cover (2) is greater than the opening critical pressure value, the automatic air release valve (4) starts to compress automatically, the valve of the automatic air release valve (4) opens, the residual gas in the water supply pipeline is discharged, and the pressure of the water supply pipeline is automatically reduced. When the pressure is less than the critical opening pressure value, the automatic air release valve (4) is closed and the water supply pipeline supplies water.

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