Labyrinth throttling piece nozzle

Abstract

The utility model relates to a temperature and pressure reducing device, and aims to provide a labyrinth throttling piece nozzle which has the characteristics of good using effect, convenience in use, simple structure and lower cost. According to the technical scheme, the labyrinth throttling piece nozzle comprises a nozzle pipe and is characterized in that a labyrinth nozzle is installed on the right side end face of the nozzle pipe, and a plurality of annular labyrinth throttling pieces and labyrinth baffles are coaxially and sequentially fixed to the inner side end face of the labyrinth nozzle in an overlapped mode; a plurality of labyrinth channels penetrating through the inner circumferential face and the outer circumferential face are evenly distributed on the end face of one side of the labyrinth throttling piece. The inner side openings of a plurality of needle-shaped spraying holes in the labyrinth nozzle are all formed in the inner circumferential area of the labyrinth throttling piece, and the outer side openings of the needle-shaped spraying holes are larger than the inner circumference of the labyrinth throttling piece.

Description

Technical Field

[0001] The utility model relates to a temperature reduction and pressure reduction device, in particular to a temperature reduction water tracing temperature reducer. Background Art

[0002] CN112191380 A discloses a cooling device atomizing nozzle structure, comprising: an inner cylinder, the inner cylinder is provided with a first branch flow channel, a second branch flow channel and a liquid outlet hole, the first branch flow channel and the second branch flow channel converge at the liquid outlet hole and connect the inner and outer walls of the inner cylinder; the first branch flow channel and the second branch flow channel both include a first inner hole and a second inner hole from the inside to the outside, the first inner hole is arranged along the radial direction of the inner cylinder, the second inner hole is perpendicular to the first inner hole, the two second inner holes are staggered and combined with the liquid outlet hole to form a swirl chamber; an outer cylinder, the outer cylinder is sleeved on the inner cylinder, the outer cylinder is provided with an atomizing spray hole, the atomizing spray hole connects the inner and outer walls of the outer cylinder, and the atomizing spray hole and the liquid outlet hole are connected and correspond to each other. It has the characteristics of good atomization effect.

[0003] The disadvantages of this nozzle structure are that the operation and adjustment are relatively troublesome, the structure is complex, and the manufacturing cost is also high. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned background technology and provide a labyrinth throttling plate nozzle, which should have the characteristics of good use effect, convenient use, simple structure and low cost.

[0005] The technical solution provided by the utility model is:

[0006] A labyrinth throttling plate nozzle comprises a nozzle tube, characterized in that a labyrinth nozzle is installed on the right end face of the nozzle tube, and a plurality of annular labyrinth throttling plates and a labyrinth baffle are coaxially and sequentially stacked and fixed on the inner end face of the labyrinth nozzle; a plurality of labyrinth channels penetrating the inner and outer circumferential surfaces are arranged on one end face of the labyrinth throttling plate; the inner openings of a plurality of needle-shaped spray holes on the labyrinth nozzle are all arranged in the inner circumference area of ​​the labyrinth throttling plate, and the outer openings of these needle-shaped spray holes are larger than the inner circumference of the labyrinth throttling plate.

[0007] The two side walls of the labyrinth channel are serrated to increase the flow resistance of the fluid and reduce the spraying wear of the nozzle.

[0008] Each labyrinth channel has two forked entrances and two forked exits, so as to increase the flow resistance of the fluid and obtain a decompression effect.

[0009] The outer diameter of the labyrinth throttling plate is the same as that of the labyrinth baffle and the distance between the labyrinth throttling plate and the inner wall of the nozzle tube is greater than 5 mm, so as to keep the entrance of the labyrinth channel unobstructed.

[0010] The beneficial effects of the utility model are as follows: the labyrinth throttling plate nozzle provided by the utility model can effectively reduce the pressure of the cooling water, slow down the scouring and wear on the nozzle, reduce the clogging phenomenon of the nozzle, and increase the service life of the nozzle; and it has a simple structure, is easy to manufacture, has a low cost, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model.

[0012] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the front end of the middle nozzle tube.

[0013] Figure 3 yes Figure 2 Schematic diagram of the enlarged structure of the middle labyrinth throttle plate ( Figure 2 Left-view view).

[0014] Reference numerals in the figure: nozzle tube 1, labyrinth baffle 2, labyrinth throttling plate 3, labyrinth nozzle 4, needle-shaped spray hole 5, labyrinth channel 6, inlet 6-1, outlet 6-2, labyrinth inner cavity 7. DETAILED DESCRIPTION

[0015] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0016] The labyrinth throttle nozzle shown in the drawings comprises a nozzle tube 1 which is installed in a steam pipe when in use; this structure is similar to the existing desuperheater nozzle.

[0017] The improvement of the utility model is that the right end face of the nozzle tube is sealed and fixed with a labyrinth nozzle 4, and the inner end face of the labyrinth nozzle (the end face of the labyrinth nozzle located on one side of the inner cavity of the nozzle tube) is coaxially fixed with a plurality of annular labyrinth throttling pieces 3 and a labyrinth baffle 2; the fixing method is that the plurality of labyrinth throttling pieces are first coaxially stacked and fixed (welded) on the inner end face of the labyrinth nozzle in sequence, and then the labyrinth baffle is sealed and fixed on the labyrinth throttling piece; thus, a labyrinth inner cavity 7 is formed in the labyrinth throttling piece. One end face ( Figure 2 It can be seen that on the left end surface) there are a number of labyrinth passages 6 that penetrate the inner and outer circumferential surfaces; these labyrinth passages ( Figure 3Eight labyrinth channels are shown) arranged radially on the end face of the labyrinth throttling plate; after the labyrinth throttling plates are coaxially stacked in sequence and sealed and fixed with labyrinth baffles, all the labyrinth channels become pipes. The inner openings of the several needle-shaped spray holes 5 on the labyrinth nozzle are all set within the inner ring range of the labyrinth throttling plate, so that the pressure cooling water in the labyrinth cavity can be directly sprayed out through the needle-shaped spray holes; the outer openings of the several needle-shaped spray holes are larger than the inner circumference of the labyrinth throttling plate, so that the water mist sprayed from the needle-shaped spray holes is radial and mixed with the steam in the steam pipe, thereby increasing the mixing efficiency.

[0018] Furthermore, the entrance 6-1 of each labyrinth channel is divided into two, and the exit 6-2 of each labyrinth channel is also divided into two, so as to increase the flow resistance of the fluid and reduce the spraying wear of the nozzle. The depth and width of the labyrinth channel are determined according to needs.

[0019] The two side walls of the labyrinth passage ( Figure 3 It can be seen that: it is parallel to the left and right sides of the drawing and is serrated to further increase the resistance to fluid flow and reduce the wear of the nozzle due to spraying and brushing.

[0020] The outer diameter of the labyrinth throttling plate is the same as that of the labyrinth baffle and the distance between the labyrinth throttling plate and the inner wall of the nozzle tube is greater than 5 mm, so as to keep the entrance of the labyrinth channel unobstructed.

[0021] The working principle of the utility model is that when working, cooling water is input from the inlet of the nozzle pipe, then enters the inner cavity of the labyrinth through the labyrinth channel from the outer circumferential surface of the labyrinth throttling piece, and finally is ejected from the needle-shaped spray hole of the labyrinth nozzle into the steam channel to cool the steam; due to the large resistance in the labyrinth channel, the pressure of the cooling water on the nozzle part is reduced, the scouring and wear of the nozzle is slowed down, and the blockage of the nozzle is also significantly reduced.

[0022] The utility model is suitable for occasions where the temperature-reducing water pressure is high and the water flow rate is large.

Claims

1. A labyrinth throttle nozzle, comprising a nozzle tube, characterized in that: A labyrinth nozzle (4) is installed on the right end face of the nozzle tube, and a plurality of annular labyrinth throttling plates (3) and a labyrinth baffle (2) are coaxially and sequentially stacked and fixed on the inner end face of the labyrinth nozzle; a plurality of labyrinth channels (6) penetrating the inner and outer circumferential surfaces are arranged on one end face of the labyrinth throttling plate; the inner openings of the plurality of needle-shaped spray holes on the labyrinth nozzle are all arranged in the inner circumference area of ​​the labyrinth throttling plate, and the outer openings of these needle-shaped spray holes are larger than the inner circumference of the labyrinth throttling plate.

2. The labyrinth throttling nozzle according to claim 1, characterized in that: The (6-1) of each labyrinth channel is divided into two, and the exit (6-2) of each labyrinth channel is also divided into two, so as to increase the flow resistance of the fluid and obtain the pressure reduction effect.

3. The labyrinth throttling plate nozzle according to claim 2, characterized in that: The two side walls of the labyrinth channel are serrated to increase the flow resistance of the fluid and reduce the spraying wear of the nozzle.

4. The labyrinth throttling plate nozzle according to claim 3, characterized in that: The outer diameter of the labyrinth throttling plate is the same as that of the labyrinth baffle and the distance between the labyrinth throttling plate and the inner wall of the nozzle tube is greater than 5 mm, so as to keep the entrance of the labyrinth channel unobstructed.

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