Anti-backflow device for metal hose

Abstract

The utility model relates to the technical field of metal hoses, and discloses a metal hose backflow prevention device which comprises a backflow prevention pipe, a water guide cover is in threaded connection with the interior of the left side of the backflow prevention pipe, a vertical rod is fixedly connected with the interior of the backflow prevention pipe, a main sliding rod is fixedly connected with the left side of the vertical rod, and a spring is arranged on the surface of the main sliding rod in a sleeved mode. And the surface of the main sliding rod is slidably sleeved with a water baffle, a water blocking plug is slidably arranged on the surface of the main sliding rod, and the surface of the left side of the main sliding rod is in threaded connection with a hexagon nut. According to the backflow prevention device for the metal hose, when a spring needs to be replaced, a transverse plate is pinched by hand, a water guide cover is rotated, the water guide cover is screwed out, then a hexagon nut on the left side of a main sliding rod is screwed off, a water baffle and a water baffle plug are taken down, then the spring is taken down, and a new spring is replaced, so that replacement of the spring is facilitated, the whole body does not need to be replaced, and the replacement efficiency is improved. And the cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metal hoses, in particular to a metal hose backflow prevention device. Background Art

[0002] Metal hose is an important component of the connecting pipeline of modern industrial equipment. Metal hose is used as wire and cable protection tube for wires, cables, automation instrument signals and civilian shower hose. The specifications range from 3mm to 150mm. Small-diameter metal hose (inner diameter 3mm to 25mm) is mainly used for sensor line protection of precision optical rulers and industrial sensor line protection. The metal hose is made of 1Cr18Ni9Ti stainless steel material and has strong corrosion resistance.

[0003] Chinese patent authorization announcement No. CN 218510373 U discloses a metal hose backflow prevention device, including a backflow preventer, which is arranged in a cylindrical shape, and flanges are welded at both ends of the backflow preventer; the backflow preventer is connected to a hose body, and flanges are welded at both ends of the hose body; a fixed horizontal plate is welded laterally inside the backflow preventer, a rotating shaft is arranged on one side of the fixed horizontal plate, and two semicircular movable plates are symmetrically sleeved on the outer side of the rotating shaft; a spring is fixedly connected between the fixed horizontal plate and the semicircular movable plate; two blocks are symmetrically arranged on the inner wall of the backflow preventer, and the blocks are arranged parallel to the fixed horizontal plate. The backflow preventer is installed in the correct direction. When backflow occurs, under the action of reverse water flow and the tension of the spring, the movable plate quickly returns to a closed state to achieve the backflow prevention effect, and the rapid response greatly improves the backflow prevention effect.

[0004] However, the above-mentioned prior art cannot effectively replace the spring because the spring will lose its resilience after long-term use. When the spring loses its resilience, it needs to be replaced as a whole, which is costly. Therefore, a metal hose backflow prevention device is urgently needed. Utility Model Content

[0005] The utility model aims to provide a metal hose backflow prevention device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a metal hose backflow prevention device, comprising an anti-backflow pipe, the left side of the anti-backflow pipe is internally threadedly connected to a water guide cover, the inside of the anti-backflow pipe is fixedly connected to a vertical rod, the left side of the vertical rod is fixedly connected to a main sliding rod, the surface of the main sliding rod is sleeved with a spring, the surface sliding sleeve of the main sliding rod is slidingly sleeved with a water baffle, the surface of the main sliding rod is slidingly provided with a water baffle, and the left side surface of the main sliding rod is threadedly connected to a hexagonal nut.

[0007] Preferably, a horizontal plate is fixedly connected to the left side of the water guide cover, and the surface of the horizontal plate is hollow.

[0008] Through the set water guide cover, when water flows into the water guide cover from the left side of the backflow prevention pipe, it impacts the water retaining plug and the water retaining plate under the pressure of the water flow. Under the action of pressure, the spring contracts, causing the water retaining plate and the water retaining plug to slide to the right on the main sliding rod, thereby releasing the seal of the water guide cover and realizing the normal circulation of water.

[0009] Preferably, the right side of the water retaining plug is fixedly connected to the water retaining plate, and the left side of the main sliding rod extends into the water guide cover.

[0010] Preferably, the water baffle is located on the left side of the spring, and the spring is in conflict with the water baffle.

[0011] When backflow occurs, the water will flow in the opposite direction, and the spring will reset, causing the water baffle plate and the water baffle plug to reset, and the water baffle plug to be inserted into the water guide cover to seal the water guide cover and prevent backflow. When the spring needs to be replaced, you can pinch the horizontal plate by hand, turn the water guide cover, unscrew the water guide cover, then unscrew the hexagonal nut on the left side of the main slide bar, remove the water baffle plate and the water baffle plug, then remove the spring and replace it with a new spring.

[0012] Preferably, two auxiliary sliding rods are fixedly connected to the left side of the vertical rod, and one side of the water retaining plate is provided with insertion holes adapted to the two auxiliary sliding rods, and the two auxiliary sliding rods are respectively slidably inserted into the insertion holes.

[0013] Preferably, a left flange is fixedly connected to the left side of the anti-backflow pipe, a left through hole is opened on the surface of the left flange, a left threaded rod is arranged in the left through hole, and a left fixing nut is threadedly connected to the surface of the left threaded rod.

[0014] The left flange and the right flange are provided to facilitate installation and connection with the metal hose.

[0015] Preferably, a right flange is fixedly connected to the right side of the anti-backflow pipe, a right through hole is opened on the surface of the right flange, a right threaded rod is arranged in the right through hole, and a right fixing nut is arranged on the surface of the right threaded rod.

[0016] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0017] First, the utility model provides a water guide cover, when water flows into the water guide cover from the left side of the anti-backflow pipe, it impacts the water stopper and the water stop plate under the pressure of the water flow, and the spring contracts under the action of the pressure, so that the water stop plate and the water stop plug slide to the right on the main slide bar, releasing the seal of the water guide cover, thereby realizing the normal circulation of water flow, and when backflow occurs, the water flow will flow in the opposite direction, and then the spring will reset, so that the water stop plate and the water stop plug are reset, and the water stop plug is inserted into the water guide cover, the water guide cover is sealed, and backflow prevention is realized, and when the spring needs to be replaced, the horizontal plate can be pinched by hand, the water guide cover is rotated, the water guide cover is screwed out, and then the hexagonal nut on the left side of the main slide bar is screwed off, the water stop plate and the water stop plug are removed, and then the spring is removed and replaced with a new spring, thereby facilitating the replacement of the spring, and there is no need to replace the entirety, which greatly reduces the cost.

[0018] Second, the utility model provides two auxiliary slide bars, so when the water baffle moves leftward or rightward on the main slide bar, the auxiliary slide bars can ensure the stable movement of the water baffle, and the left flange and the right flange facilitate the installation and connection with the metal hose. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from the left side;

[0021] Figure 3 This is a schematic diagram of the front cutaway three-dimensional structure of the utility model;

[0022] Figure 4 This is a front cutaway structural schematic diagram of the utility model.

[0023] Among them: 1. Anti-backflow pipe; 11. Water guide cover; 12. Vertical rod; 13. Main sliding rod; 14. Spring; 15. Water baffle; 16. Water baffle plug; 17. Hexagonal nut; 18. Cross plate; 19. Auxiliary sliding rod; 20. Left flange; 21. Left threaded rod; 22. Right flange; 23. Right threaded rod. DETAILED DESCRIPTION

[0024] 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.

[0025] The utility model provides the following technical solutions:

[0026] Embodiment 1

[0027] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 A metal hose backflow prevention device comprises a backflow prevention pipe 1, a water guide cover 11 is connected to the left side of the backflow prevention pipe 1 through internal threads, a vertical rod 12 is fixedly connected to the inside of the backflow prevention pipe 1, a main slide bar 13 is fixedly connected to the left side of the vertical rod 12, a spring 14 is sleeved on the surface of the main slide bar 13, a water baffle 15 is slidably sleeved on the surface of the main slide bar 13, a water baffle 16 is slidably provided on the surface of the main slide bar 13, and a hexagonal nut 17 is threadedly connected to the left side surface of the main slide bar 13.

[0028] A horizontal plate 18 is fixedly connected to the left side of the water guide cover 11 , and the surface of the horizontal plate 18 is hollow.

[0029] The right side of the water retaining plug 16 is fixedly connected to the water retaining plate 15 , and the left side of the main sliding rod 13 extends into the water guide cover 11 .

[0030] The water baffle plate 15 is located on the left side of the spring 14 , and the spring 14 is in conflict with the water baffle plate 15 .

[0031] Through the above technical solution, through the water guide cover 11, when the water flows into the water guide cover 11 from the left side of the anti-backflow pipe 1, the water flow impacts the water stopper 16 and the water stopper 15 under the pressure of the water flow, and the spring 14 is contracted under the action of the pressure, so that the water stopper 15 and the water stopper 16 slide to the right on the main slide bar 13, and the seal of the water guide cover 11 is released, thereby realizing the normal circulation of the water flow. When the backflow occurs, the water will flow in the reverse direction, and then the spring 14 will be reset, so that the water stopper 15 and the water stopper 16 is reset, so that the water stop plug 16 is inserted into the water guide cover 11, the water guide cover 11 is sealed to prevent backflow. When the spring 14 needs to be replaced, the cross plate 18 can be pinched by hand, the water guide cover 11 is rotated, the water guide cover 11 is screwed out, and then the hexagonal nut 17 on the left side of the main slide bar 13 is unscrewed, the water stop plate 15 and the water stop plug 16 are removed, and then the spring 14 is removed and replaced with a new spring 14, thereby facilitating the replacement of the spring 14, without the need to replace the entirety, which greatly reduces the cost.

[0032] Embodiment 2

[0033] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 On the basis of the first embodiment, it is further obtained that: two auxiliary sliding rods 19 are fixedly connected to the left side of the vertical rod 12, and one side of the water retaining plate 15 is provided with a socket adapted to the two auxiliary sliding rods 19, and the two auxiliary sliding rods 19 are slidably inserted into the sockets respectively.

[0034] A left flange 20 is fixedly connected to the left side of the backflow prevention pipe 1 . A left through hole is opened on the surface of the left flange 20 . A left threaded rod 21 is arranged in the left through hole. A left fixing nut is threadedly connected to the surface of the left threaded rod 21 .

[0035] A right flange 22 is fixedly connected to the right side of the backflow prevention pipe 1 . A right through hole is opened on the surface of the right flange 22 . A right threaded rod 23 is arranged in the right through hole. A right fixing nut is arranged on the surface of the right threaded rod 23 .

[0036] Through the above technical solution, by setting up two auxiliary slide bars 19, when the water baffle 15 moves to the left or right on the main slide bar 13, the setting of the auxiliary slide bar 19 can ensure the stable movement of the water baffle 15, and the setting of the left flange 20 and the right flange 22 facilitates the installation and connection with the metal hose.

[0037] In actual operation, when the device is in use, the installation of the backflow prevention pipe 1 is facilitated by the arrangement of the left flange 20 and the right flange 22. When water flows into the water guide cover 11 from the left side of the backflow prevention pipe 1, the water flow impacts the water stopper 16 and the water stopper plate 15 under the pressure of the water flow. Under the action of the pressure, the spring 14 contracts, and the water stopper plate 15 and the water stopper 16 slide to the right on the main slide bar 13, thereby releasing the seal of the water guide cover 11 and realizing the normal circulation of the water flow. When backflow occurs, the water flow will flow in the reverse direction, and the spring 14 will Reset, reset the water baffle plate 15 and the water baffle plug 16, and insert the water baffle plug 16 into the water guide cover 11 to seal the water guide cover 11 and prevent backflow. When the spring 14 needs to be replaced, the cross plate 18 can be pinched by hand, the water guide cover 11 can be rotated, the water guide cover 11 can be screwed out, and then the hexagonal nut 17 on the left side of the main slide bar 13 can be unscrewed, the water baffle plate 15 and the water baffle plug 16 can be removed, and then the spring 14 can be removed and replaced with a new spring 14, thereby facilitating the replacement of the spring 14, and there is no need to replace the entirety, which greatly reduces the cost.

[0038] Although the 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 thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A metal hose backflow prevention device, comprising a backflow prevention pipe (1), characterized in that: The left side of the backflow prevention pipe (1) is internally threadedly connected to a water guide cover (11), the interior of the backflow prevention pipe (1) is fixedly connected to a vertical rod (12), the left side of the vertical rod (12) is fixedly connected to a main sliding rod (13), the surface of the main sliding rod (13) is sleeved with a spring (14), the surface of the main sliding rod (13) is slidably sleeved with a water baffle (15), the surface of the main sliding rod (13) is slidably provided with a water baffle (16), and the left side surface of the main sliding rod (13) is threadedly connected to a hexagonal nut (17).

2. A metal hose backflow prevention device according to claim 1, characterized in that: A horizontal plate (18) is fixedly connected to the left side of the water guide cover (11), and the surface of the horizontal plate (18) is hollow.

3. A metal hose backflow prevention device according to claim 1, characterized in that: The right side of the water retaining plug (16) is fixedly connected to the water retaining plate (15), and the left side of the main sliding rod (13) extends into the water guide cover (11).

4. A metal hose backflow prevention device according to claim 1, characterized in that: The water baffle plate (15) is located on the left side of the spring (14), and the spring (14) is in conflict with the water baffle plate (15).

5. The metal hose backflow prevention device according to claim 1, characterized in that: Two auxiliary sliding rods (19) are fixedly connected to the left side of the vertical rod (12), and one side of the water retaining plate (15) is provided with insertion holes adapted to the two auxiliary sliding rods (19), and the two auxiliary sliding rods (19) are respectively slidably inserted into the insertion holes.

6. A metal hose backflow prevention device according to claim 1, characterized in that: A left flange (20) is fixedly connected to the left side of the backflow prevention pipe (1); a left through hole is provided on the surface of the left flange (20); a left threaded rod (21) is provided in the left through hole; and a left fixing nut is threadedly connected to the surface of the left threaded rod (21).

7. The metal hose backflow prevention device according to claim 1, characterized in that: A right flange (22) is fixedly connected to the right side of the backflow prevention pipe (1); a right through hole is provided on the surface of the right flange (22); a right threaded rod (23) is provided in the right through hole; and a right fixing nut is provided on the surface of the right threaded rod (23).

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