Venturi with non-return function and fire-fighting equipment
By designing a venturi tube with a check valve function and utilizing the check valve ball in conjunction with the inclined surface, the problem of fluid backflow after the venturi tube ejection is solved, realizing unidirectional fluid flow and preventing container contamination.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN CHUANXIAO FIRE-FIGHTING VEHICLE MFG CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-06-05
AI Technical Summary
In existing fire-fighting equipment, the Venturi tube is prone to backflow of fluid at the end of the ejection process, which can contaminate the fluid in the container in the direction of the suction tube.
A venturi tube with a check function was designed, including a diffuser tube, a suction tube, a check seat, a check ball, and a nozzle. By cooperating with the inclined surface, the fluid can flow in one direction and prevent the fluid from flowing back from the diffuser tube to the suction tube.
It effectively prevents fluid from flowing back from the diffuser to the suction tube, avoids container fluid contamination in the direction of the suction tube, and ensures unidirectional fluid flow.
Smart Images
Figure CN224320962U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fire protection equipment technology, and more specifically, to a venturi tube with a check valve function and a fire protection device. Background Technology
[0002] Existing fire-fighting equipment incorporates venturi structures to increase water pressure and spraying effectiveness.
[0003] However, existing venturi tubes only serve as ejectors, and when used on fire trucks, they are typically installed at the inlet of the fire pump. At the end of the ejection process, fluid may flow back from the suction pipe, potentially contaminating the fluid in the container from the suction pipe direction. Utility Model Content
[0004] The purpose of this invention includes, for example, providing a venturi tube and fire-fighting equipment with a check function, which can improve the situation of fluid backflow in the suction tube.
[0005] The embodiments of this utility model can be implemented as follows:
[0006] In a first aspect, this utility model provides a venturi tube with a check valve function, comprising:
[0007] Includes diffuser, suction tube, check seat, check ball, and nozzle;
[0008] Along the height direction of the diffuser tube, one end of the diffuser tube is provided with an inlet end and the other end is provided with an outlet end, and a liquid suction end is provided in the middle of the diffuser tube; the nozzle is detachably provided at the outlet end;
[0009] The suction tube includes a main body and a connecting part connected in sequence. The connecting part has a connecting channel, and the main body has an inner cavity. One end of the inner cavity communicates with the connecting channel, and the other end of the inner cavity forms an open opening. The check ball is disposed in the inner cavity.
[0010] The connecting part is detachably connected to the liquid suction end so that the connecting channel can communicate with the diffuser tube; the check seat is detachably disposed at the open port;
[0011] The check valve seat has a mating channel, and the end of the mating channel near the inner cavity forms an inclined surface;
[0012] The inner diameters of the connecting channel and the mating channel are both smaller than the outer diameter of the check ball; and the check ball can abut against the inclined surface to close the mating channel.
[0013] In an optional embodiment, the outer diameter of the connecting portion is smaller than the outer diameter of the main body.
[0014] In an optional embodiment, the check valve includes a cylindrical body and a cover body connected to each other; the outer wall of the cylindrical body can be fitted onto the inner wall of the mating channel of the suction tube, and the cover body abuts against the periphery of the opening.
[0015] In an optional embodiment, the outer diameter of the cap is the same as the outer diameter of the suction tube, so that the outer peripheral surface of the cap is flush with the outer peripheral surface of the body.
[0016] In an optional embodiment, a sealing element is further included, which is sleeved on the cylinder; when the cylinder is sleeved on the inner wall of the mating channel, the cover is held against the end face of the main body near the opening by the sealing element.
[0017] In an optional embodiment, an annular groove is provided on the cylinder near the cover, and the inner diameter of the annular groove is smaller than the outer diameter of the cylinder; the seal is held in the annular groove.
[0018] In an optional embodiment, the connecting portion includes a straight section and a transition section; the straight section is connected to the main body through the transition section; the outer diameter of the straight section is smaller than the outer diameter of the main body.
[0019] In an optional implementation, the inner diameter of the transition section tends to decrease in the direction from the main body to the straight section.
[0020] In an optional embodiment, the diffuser is tilted toward the outlet end so that an acute angle is formed between the suction tube and the diffuser.
[0021] Secondly, this utility model provides a fire-fighting device, which includes a venturi tube with a check valve function as described in any of the foregoing embodiments.
[0022] The beneficial effects of this utility model embodiment include, for example:
[0023] This solution's venturi tube with check valve function includes a diffuser, a suction tube, a check seat, a check ball, and a nozzle. The diffuser has an inlet end, an outlet end, and a suction end; the nozzle is detachably mounted at the outlet end; the suction tube is connected to the suction end. A check ball is installed within the inner cavity of the suction tube's main body. The check seat is located at the open end of the inner cavity, and its mating channel forms an inclined surface. The inner diameters of both the connecting channel and the mating channel are smaller than the outer diameter of the check ball; and the check ball can abut against the inclined surface to close the mating channel. Through the coordinated action of the check ball, the mating channel, and the inclined surface, fluid backflow from the diffuser through the suction tube towards the check seat can be prevented, thus achieving a one-way check valve function. This ensures that fluid can flow from the suction tube to the diffuser, but not from the diffuser back to the suction tube, thereby improving the situation in existing technologies where fluid flows back from the diffuser to the suction tube after ejection, leading to contamination of the fluid in the container towards the suction tube. Attached Figure Description
[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 This is a schematic diagram of the structure of a venturi tube with a check valve function according to an embodiment of the present invention;
[0026] Figure 2 This is a schematic diagram of the assembly of a venturi tube with a check valve function according to an embodiment of the present invention;
[0027] Figure 3 This is a cross-sectional view of a venturi tube with a check valve function according to an embodiment of the present invention.
[0028] Icons: 100-Diffuser tube; 101-Inlet end; 102-Outlet end; 103-Suction end; 200-Suction tube; 210-Main body; 211-Inner cavity; 212-Open port; 220-Connecting part; 221-Connecting channel; 222-Straight section; 223-Transition section; 300-Check valve seat; 301-Matching channel; 302-Inclined surface; 310-Cylinder body; 311-Annular groove; 320-Cover body; 400-Check valve ball; 500-Nozzle; 600-Seal. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0032] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0033] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.
[0035] Please refer to Figure 1 , Figure 2 and Figure 3 This embodiment provides a venturi tube with a check function, comprising:
[0036] It includes a diffuser tube 100, a suction tube 200, a check seat 300, a check ball 400, and a nozzle 500;
[0037] Along the height direction of the diffuser tube 100, one end of the diffuser tube 100 is provided with an inlet end 101 and the other end is provided with an outlet end 102, and a liquid suction end 103 is provided in the middle of the diffuser tube 100; the nozzle 500 is detachably provided at the outlet end 102.
[0038] The suction tube 200 includes a main body 210 and a connecting part 220 connected in sequence. The connecting part 220 has a connecting channel 221, and the main body 210 has an inner cavity 211. One end of the inner cavity 211 communicates with the connecting channel 221, and the other end of the inner cavity 211 forms an open opening 212. A check ball 400 is disposed in the inner cavity 211.
[0039] The connecting part 220 is detachably connected to the liquid suction end 103 so that the connecting channel 221 can communicate with the diffuser tube 100; the check seat 300 is detachably provided at the open port 212;
[0040] The check seat 300 has a mating channel 301, and the end of the mating channel 301 near the inner cavity 211 forms an inclined surface 302;
[0041] The inner diameters of both the connecting channel 221 and the mating channel 301 are smaller than the outer diameter of the check ball 400; and the check ball 400 can abut against the inclined surface 302 to close the mating channel 301.
[0042] The diffuser tube 100 of this design has an inlet end 101, an outlet end 102, and a suction end 103; a nozzle 500 is detachably mounted on the outlet end 102; and a suction tube 200 is connected to the suction end 103. A check ball 400 is installed in the inner cavity 211 of the main body 210 of the suction tube 200. A check seat 300 is located at the open opening 212 of the inner cavity 211, and the mating channel 301 of the check seat 300 forms an inclined surface 302. The inner diameters of the connecting channel 221 and the mating channel 301 are both smaller than the outer diameter of the check ball 400; and the check ball 400 can abut against the inclined surface 302 to close the mating channel 301. That is, through the coordinated action of the check ball 400, the mating channel 301, and the inclined surface 302, the backflow of fluid from the diffuser tube 100 through the suction tube 200 to the check seat 300 can be prevented, thus achieving a one-way check function. This ensures that the fluid can flow from the suction tube 2001 to the diffuser tube 100, but not from the diffuser tube 100 to the suction tube 200. This improves the situation in the prior art where the fluid flows back from the diffuser tube 100 to the suction tube 200 after ejection, which leads to contamination of the fluid in the container in the direction of the suction tube 200.
[0043] It should be noted that the diffuser 100 can pressurize and increase the flow rate of the fluid in the pipe through the Venturi effect, thereby achieving the ejection effect. The suction pipe 200 is threadedly connected to the suction end 103 of the diffuser 100.
[0044] Please continue reading. Figure 1 , Figure 2 and Figure 3As can be seen from the figure, in the optional embodiment, the outer diameter of the connecting part 220 is smaller than the outer diameter of the main body 210. This arrangement can significantly reduce the volume of the diffuser tube 100 and the suction tube 200, thereby facilitating the flexible assembly of the diffuser tube 100 and the suction tube 200. Furthermore, the smaller connecting part 220 ensures that the suction tube 200 is firmly connected to the suction end 103 of the diffuser tube 100 while also ensuring the space occupied by the suction tube 200.
[0045] As can also be seen from the figure, in an optional embodiment, the check valve 300 includes a cylindrical body 310 and a cover 320 connected to each other; the outer wall of the cylindrical body 310 can be fitted onto the inner wall of the mating channel 301 of the suction tube 200, and the cover 320 abuts against the periphery of the open opening 212. This ensures the flatness of the check valve 300 and the suction tube 200, and also reduces the space occupied by the check valve 300, thereby reducing the overall volume of the suction tube 200 and the check valve 300. Optionally, the outer wall of the cylindrical body 310 is provided with external threads, and the inner wall of the mating channel 301 is provided with internal threads, so that the check valve 300 and the suction tube 200 are threadedly connected.
[0046] In an optional embodiment, the outer diameter of the cover 320 is the same as the outer diameter of the suction tube 200, so that the outer peripheral surface of the cover 320 is flush with the outer peripheral surface of the body 210.
[0047] Furthermore, in an optional embodiment, the venturi tube with check valve function also includes a sealing element 600, which is sleeved on the cylinder 310. When the cylinder 310 is fitted onto the inner wall of the mating channel 301, the cover 320 is held against the end face of the main body 210 near the open opening 212 by the sealing element 600. The sealing element 600 can ensure the sealing between the check seat 300 and the suction tube 200, thereby ensuring the airtightness of the check ball 400 when it can close the mating channel 301.
[0048] In an optional embodiment, an annular groove 311 is provided on the cylinder 310 near the cover 320, and the inner diameter of the annular groove 311 is smaller than the outer diameter of the cylinder 310; the seal 600 is held in the annular groove 311. This arrangement ensures that the seal 600 is securely disposed in the annular groove 311.
[0049] In an optional embodiment, the connecting portion 220 includes a straight section 222 and a transition section 223; the straight section 222 is connected to the main body 210 through the transition section 223; the outer diameter of the straight section 222 is smaller than the outer diameter of the main body 210. The arrangement of the transition section 223 and the straight section 222 can ensure the structural stability at the connecting portion 220 while facilitating the connection between the main body 210 and the diffuser tube 100.
[0050] In an optional embodiment, the inner diameter of the transition section 223 tends to decrease from the main body 210 to the straight section 222. That is, the transition section 223 achieves a smooth connection between the straight section 222 and the inner cavity 211 by reducing its inner diameter, thereby ensuring smooth fluid ejection. Optionally, the inner diameter of the transition section 223 gradually decreases to form a pipe opening with a trapezoidal longitudinal cross-section.
[0051] In an optional embodiment, the diffuser 100 is inclined toward the outlet end 102 so that an acute angle is formed between the suction tube 200 and the diffuser 100. This arrangement allows for better entrainment of fluid in the suction tube 200.
[0052] It should also be noted that the diffuser tube 100 is cast from a casting. Sealing threads are machined at the three outlets of the diffuser tube 100. The nozzle 500 is connected to the diffuser tube 100 through the threads, serving as the ejector end of the venturi tube.
[0053] The suction end 103 of the diffuser tube 100 is machined with a platform for placing a sealing gasket. The suction tube 200 is connected to the suction end 103 of the diffuser tube 100 by threads. The threaded end face of the suction tube 200 contacts the sealing gasket, and the other side of the sealing gasket contacts the platform of the suction end 103 of the diffuser tube 100. Due to the tightening of the threads, the sealing gasket contacts the diffuser tube 100 and the suction tube 200 to form a seal and prevent leakage. The other end of the suction tube 200 is machined with a sealing thread, and the check seat 300 is connected to the suction tube 200 by threads.
[0054] When in use, when the reverse pressure water comes into contact with the check ball 400, the surface of the check ball 400 is in complete contact with the inclined surface 302 of the check seat 300, thus performing the check function.
[0055] Secondly, this utility model provides a fire-fighting device, which includes a venturi tube with a check valve function as described in any of the foregoing embodiments.
[0056] In summary, this utility model embodiment provides a venturi tube with a check valve function, which has at least the following advantages:
[0057] In this design, the inner diameters of the connecting channel 221 and the mating channel 301 of the venturi tube with check function are both smaller than the outer diameter of the check ball 400; and the check ball 400 can abut against the inclined surface 302 to close the mating channel 301. That is, through the coordinated cooperation of the check ball 400, the mating channel 301, and the inclined surface 302, the backflow of fluid from the diffuser 100 through the suction pipe 200 to the check seat 300 can be prevented, thus achieving a one-way check function.
[0058] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A venturi tube with a check valve function, characterized in that, include: It includes a diffuser (100), a suction tube (200), a check seat (300), a check ball (400), and a nozzle (500); Along the height direction of the diffuser tube (100), one end of the diffuser tube (100) is provided with an inlet end (101) and the other end is provided with an outlet end (102), and a liquid suction end (103) is provided in the middle of the diffuser tube (100); the nozzle (500) is detachably provided at the outlet end (102); The suction tube (200) includes a main body (210) and a connecting part (220) connected in sequence. The connecting part (220) has a connecting channel (221), and the main body (210) has an inner cavity (211). One end of the inner cavity (211) communicates with the connecting channel (221), and the other end of the inner cavity (211) forms an open opening (212). The check ball (400) is disposed in the inner cavity (211). The connecting part (220) is detachably connected to the liquid suction end (103) so that the connecting channel (221) can communicate with the diffuser tube (100); the check seat (300) is detachably disposed at the open port (212); The check valve (300) has a mating channel (301), and the end of the mating channel (301) near the inner cavity (211) forms an inclined surface (302); The inner diameters of the connecting channel (221) and the mating channel (301) are both smaller than the outer diameter of the check ball (400); and the check ball (400) can abut against the inclined surface (302) to close the mating channel (301).
2. The venturi tube with check valve function according to claim 1, characterized in that: The outer diameter of the connecting part (220) is smaller than the outer diameter of the main body (210).
3. The venturi tube with check valve function according to claim 1, characterized in that: The check valve (300) includes a cylindrical body (310) and a cover (320) connected to each other; the outer wall of the cylindrical body (310) can be fitted onto the inner wall of the mating channel (301) of the suction tube (200), and the cover (320) abuts against the periphery of the opening (212).
4. The venturi tube with check valve function according to claim 3, characterized in that: The outer diameter of the cover (320) is the same as the outer diameter of the suction tube (200) so that the outer peripheral surface of the cover (320) is flush with the outer peripheral surface of the body (210).
5. The venturi tube with check valve function according to claim 3, characterized in that: It also includes a sealing element (600), which is sleeved on the cylinder (310); when the cylinder (310) is sleeved on the inner wall of the mating channel (301), the cover (320) is held against the end face of the main body (210) near the opening (212) by the sealing element (600).
6. The venturi tube with check valve function according to claim 5, characterized in that: The cylindrical body (310) is provided with an annular groove (311) near the cover (320), and the inner diameter of the annular groove (311) is smaller than the outer diameter of the cylindrical body (310); the sealing element (600) is held in the annular groove (311).
7. The venturi tube with check valve function according to claim 1, characterized in that: The connecting part (220) includes a straight section (222) and a transition section (223); the straight section (222) is connected to the main body (210) through the transition section (223); the outer diameter of the straight section (222) is smaller than the outer diameter of the main body (210).
8. The venturi tube with check valve function according to claim 7, characterized in that: The inner diameter of the transition section (223) tends to decrease from the main body (210) to the straight section (222).
9. The venturi tube with check valve function according to claim 1, characterized in that: The diffuser tube (100) is inclined toward the outlet end (102) so that an acute angle is formed between the suction tube (200) and the diffuser tube (100).
10. A fire-fighting device, characterized in that: The fire-fighting equipment includes a venturi tube with a check valve function as described in any one of claims 1-9.