Check valve structure for fire fighting

Abstract

The utility model relates to the technical field of check valves, in particular to a fire-fighting check valve structure which comprises a valve body, a baffle is mounted in the valve body, a limiting rod is fixedly connected in the center of the baffle, a spring and a locking mechanism are mounted on the outer side of the limiting rod, and the locking mechanism is fixedly connected with the baffle. A locking mechanism is installed on the outer side of the valve body and can lock the position of the limiting rod, the position of the blocking plate is fixed by locking the position of the limiting rod, a fixed space is formed by the blocking plate and an opening in the check valve, and the limiting mechanism is installed on the outer side of the valve body. The limiting mechanism can extrude the baffle plate, so that the distance between the baffle plate and the opening of the check valve is increased more conveniently, repeated opening and closing under the impact of water flow are avoided, and a circulation space is stably provided; according to the check valve, the abrasion consumption of parts in the check valve is reduced, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to check valve technical field, concretely is a check valve structure for fire fighting. BACKGROUND

[0002] The check valve for fire fighting is a valve specially designed for the fire fighting system, which is automatically opened and closed by the flow of medium (such as water) itself, and only allows the medium to flow in one direction and effectively prevents the reverse flow. When the fire pump is started, the valve will be opened by the water pressure, and once the fire pump is stopped, the valve will be tightly combined with the valve seat sealing surface due to the weight and the reverse force of the water, thereby ensuring the valve is closed and preventing the fluid from flowing backward. This valve is crucial in the fire fighting system, which not only ensures the fluid to flow in a single direction, but also prevents the fluid from flowing backward in the event of an accident, ensuring the safety of the pipeline equipment.

[0003] The existing check valve needs to be impacted by water pressure to open the internal structure of the check valve when in use, and the water flow can only flow after the internal structure of the check valve is opened. However, when stable intermittent water delivery is required, the internal structure of the check valve is repeatedly opened and closed under the impact of water flow, which increases the wear and tear of the internal parts of the check valve, and cannot effectively prolong the service life.

[0004] Therefore, we propose a check valve structure for fire fighting. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a check valve structure for fire fighting to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a check valve structure for fire fighting, comprising: a valve body, a blocking plate is installed inside the valve body, a limiting rod is fixedly connected inside the center of the blocking plate, and a spring is installed outside the limiting rod;

[0007] A locking mechanism is installed outside the valve body, which comprises a fixed table, a plug rod is slidingly installed inside the fixed table, and the fixed table is fixedly connected outside the valve body.

[0008] A limiting mechanism is installed outside the valve body, which comprises a movable slot, the movable slot is symmetrically provided outside the valve body, and an extrusion block is installed inside the movable slot.

[0009] Preferably, a limiting ring is installed inside the valve body, bumps are sequentially and equidistantly fixedly connected inside the valve body, clamping blocks are sequentially and equidistantly fixedly connected outside the limiting ring, and the bottom of the limiting ring is in contact with the top surface of the spring.

[0010] Preferably, the valve body is fixedly connected with a connecting ring outside both ends, and the connecting ring is provided with a connecting hole inside.

[0011] Preferably, the locking mechanism further comprises a threaded rod, the plug rod is provided with the threaded rod inside, and the threaded rod is engaged with the plug rod through external thread cooperation, the valve body is fixedly connected with a support column outside, the support column is fixedly connected with a fixed plate at the top, the fixed plate is rotatably connected with a rotating disc at the top, and the support column is fixedly connected with the rotating disc. When the rotating disc rotates, the threaded rod rotates, the plug rod moves outside the engagement connection, the plug rod moves downward in the fixed table, and the position of the limiting rod is locked.

[0012] Preferably, the limiting rod is provided with a locking hole inside for connecting the plug rod.

[0013] Preferably, the limiting mechanism further comprises a sliding rail, the valve body is fixedly connected with the sliding rail outside, and the sliding rail is slidably connected with the extrusion block, the valve body is provided with an extrusion ring outside, the valve body is provided with a sliding groove outside, the extrusion ring is fixedly connected with a sliding plate inside, and the valve body is slidably connected with the extrusion ring through the cooperation of the sliding plate and the sliding groove. When the extrusion ring is operated to move, the extrusion ring moves through the cooperation of the sliding groove and the sliding plate, the extrusion block is extruded by the extrusion ring, the extrusion block moves downward in the movable groove through the cooperation of the sliding rail, and the extrusion block extrudes the blocking plate in the movable groove.

[0014] Preferably, the extrusion block is a trapezoidal shape.

[0015] Compared with the prior art, the utility model has the advantages that the cooperation of the fixed table, the plug rod, the threaded rod, the support column, the fixed plate, the rotating disc and the locking hole can lock the position of the limiting rod, lock the limiting rod, fix the position of the blocking plate, form a fixed space between the blocking plate and the opening of the check valve, extrude the blocking plate through the cooperation of the movable groove, the extrusion block, the sliding rail, the limiting ring, the sliding groove and the sliding plate, more conveniently increase the distance between the blocking plate and the opening of the check valve, avoid repeated opening and closing under the impact of water flow, and stably provide a flow space. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a whole structure schematic view of the utility model;

[0017] Fig. 2 It is a structure schematic view of the utility model;

[0018] Fig. 3The utility model discloses a structure schematic drawing.

[0019] In the drawing: 1, valve body body; 2, barrier plate; 3, limit rod; 4, spring; 5, limit ring; 6, lug; 7, clamping block; 8, connecting ring; 9, connecting hole; 10, fixed platform; 11, plug rod; 12, threaded rod; 13, support column; 14, fixed plate; 15, rotating disc; 16, locking hole; 17, movable slot; 18, extrusion block; 19, slide rail; 20, extrusion ring; 21, sliding groove; 22, sliding plate. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0021] Please refer to Figs. 1-3 A fire -fighting check valve structure, include: valve body body 1, the inside installation barrier plate 2 of valve body body 1, the inside fixed connection limit rod 3 at barrier plate 2 center, the outside installation spring 4 of limit rod 3,

[0022] Locking mechanism, the locking mechanism including fixed platform 10 is installed on the outside of valve body body 1, and the fixed platform 10 is slidably installed in the inside of valve body body 1.

[0023] Limiting mechanism, the limiting mechanism including movable slot 17 is installed on the outside of valve body body 1, and the movable slot 17 is symmetrically formed on the outside of valve body body 1, and the extrusion block 18 is installed in the inside of movable slot 17.

[0024] Please refer to Figs. 1-3 The limit ring 5 is installed in the inside of valve body body 1, the lug 6 is sequentially and equidistantly fixedly connected in the inside of valve body body 1, the clamping block 7 is sequentially and equidistantly fixedly connected on the outside of limit ring 5, and the bottom of limit ring 5 is in contact with the top surface of spring 4.

[0025] Please refer to Figs. 1-3 The connecting ring 8 is fixedly connected on the outside of both ends of valve body body 1, and the connecting hole 9 is sequentially formed in the inside of connecting ring 8.

[0026] Please refer to Figs. 1-3The locking mechanism further comprises a threaded rod 12, the threaded rod 12 is internally installed on the inserting rod 11 and is engaged and connected with the inserting rod 11 through the threaded cooperation on the outside, the valve body 1 is sequentially fixedly connected with a supporting column 13, the supporting column 13 is fixedly connected with a fixed plate 14 at the top, the fixed plate 14 is rotatably installed with a rotating disc 15 at the top, and the supporting column 13 is fixedly connected with the rotating disc 15. When the rotating disc 15 rotates, the threaded rod 12 rotates together, the threaded rod 12 rotates to drive the inserting rod 11 connected on the outside to move, the inserting rod 11 moves downwards in the fixed table 10 until the inserting rod 11 moves into the locking hole 16, so as to lock the position of the limiting rod 3.

[0027] Please refer to Figs. 1-3 The limiting rod 3 is internally provided with a locking hole 16 for connecting the inserting rod 11.

[0028] Please refer to Figs. 1-3 The limiting mechanism further comprises a sliding rail 19, the valve body 1 is fixedly connected with the sliding rail 19 on the outside, and the sliding rail 19 is slidably connected with the extruding block 18, the valve body 1 is installed with an extruding ring 20 on the outside, the valve body 1 is provided with a sliding groove 21 on the outside, the extruding ring 20 is fixedly connected with a sliding plate 22 in the inside in a symmetrical manner, and the extruding ring 20 is slidably connected with the valve body 1 through the cooperation of the sliding groove 21 and the sliding plate 22. The extruding ring 20 is moved, the extruding ring 20 is slidably moved through the cooperation of the sliding groove 21 and the sliding plate 22, until the extruding ring 20 extrudes the extruding block 18, when the extruding block 18 is extruded, the extruding block 18 moves into the movable groove 17 through the cooperation of the sliding rail 19, and the extruding block 18 extrudes the blocking plate 2 in the movable groove 17.

[0029] Please refer to Figs. 1-3 The extruding block 18 is in the shape of an inclined plate trapezoid.

[0030] Working principle: when the device needs to be used, the squeezing ring 20 is operated to move, the squeezing ring 20 is slid through the cooperation of the sliding groove 21 and the sliding plate 22, until the squeezing ring 20 squeezes the squeezing block 18, when the squeezing block 18 is squeezed, the squeezing block 18 moves to the inside of the movable slot 17 through the cooperation of the sliding rail 19, the squeezing block 18 squeezes the blocking plate 2 in the movable slot 17 and moves the blocking plate 2, the blocking plate 2 is driven to move together with the limiting rod 3, the limiting rod 3 is aligned with the plug rod 11 in the process of moving, then the rotating disc 15 is operated, the rotating disc 15 is rotated to drive the threaded rod 12 to rotate together, the threaded rod 12 is rotated to drive the externally meshed plug rod 11 to move, the plug rod 11 moves downward in the fixed table 10, until the plug rod 11 moves into the locking hole 16, so that the position of the limiting rod 3 is locked, a stable flow space is formed to stably and intermittently convey water.

[0031] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments change, modify, replace, and vary in many ways without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fire-fighting check valve structure, characterized in that, include: The valve body (1) has a baffle plate (2) installed inside it. A limit rod (3) is fixedly connected inside the center of the baffle plate (2). A spring (4) is installed on the outside of the limit rod (3). Locking mechanism: A locking mechanism is installed on the outside of the valve body (1). The locking mechanism includes a fixed platform (10). The fixed platform (10) is fixedly connected to the outside of the valve body (1). A plug rod (11) is slidably installed inside the fixed platform (10). The limiting mechanism is installed on the outside of the valve body (1). The limiting mechanism includes a movable groove (17). The movable groove (17) is symmetrically opened on the outside of the valve body (1). An extrusion block (18) is installed inside the movable groove (17).

2. The fire-fighting check valve structure according to claim 1, characterized in that: The valve body (1) is equipped with a limiting ring (5) inside. The valve body (1) is connected with protrusions (6) at equal intervals in sequence. The limiting ring (5) is connected with a locking block (7) at equal intervals in sequence on the outside. The bottom of the limiting ring (5) is in contact with the top surface of the spring (4).

3. The fire-fighting check valve structure according to claim 1, characterized in that: The valve body (1) has connecting rings (8) fixedly connected to the outer sides of both ends, and connecting holes (9) are sequentially opened inside the connecting rings (8).

4. The fire-fighting check valve structure according to claim 1, characterized in that: The locking mechanism also includes a threaded rod (12), which is installed inside the insert rod (11). The threaded rod (12) is engaged with the insert rod (11) through an external thread. A support column (13) is fixedly connected to the outside of the valve body (1). A fixing plate (14) is fixedly connected to the top of the support column (13). A rotating disk (15) is rotatably installed on the top of the fixing plate (14). The top of the support column (13) is fixedly connected to the rotating disk (15).

5. The fire-fighting check valve structure according to claim 1, characterized in that: The limiting rod (3) has a locking hole (16) inside for connecting the insertion rod (11).

6. The fire-fighting check valve structure according to claim 1, characterized in that: The limiting mechanism also includes a slide rail (19). The slide rail (19) is fixedly connected to the outside of the valve body (1), and the slide rail (19) is slidably connected to the extrusion block (18). An extrusion ring (20) is installed on the outside of the valve body (1). A sliding groove (21) is opened on the outside of the valve body (1). A sliding plate (22) is symmetrically fixedly connected inside the extrusion ring (20), and the extrusion ring (20) is slidably connected to the valve body (1) through the cooperation of the sliding plate (22) and the sliding groove (21).

7. The fire-fighting check valve structure according to claim 1, characterized in that: The extrusion block (18) is a trapezoidal shape with an inclined plate.

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