Annular desuperheating water nozzle arranged on desuperheating pressure reducer

Abstract

The utility model relates to a nozzle, and aims to provide a desuperheating water annular nozzle which is arranged on a desuperheating pressure reducer, can improve the utilization rate of desuperheating water, and is simple in structure and lower in cost. According to the technical scheme, a desuperheating water annular nozzle is arranged on a desuperheating and decompressing device; the nozzle is characterized by comprising an annular water spraying inner sleeve, a water tank annularly arranged on the outer circumference of the water spraying inner sleeve, a plurality of water spraying holes uniformly distributed in the circumferential direction of the water spraying inner sleeve, and a water spraying outer sleeve coaxially wrapping the outer circumferential surface of the water spraying inner sleeve, wherein the two ends of each water spraying hole respectively penetrate through the inner circumferential surface of the water spraying inner sleeve and the water tank; the water inlet pipe is fixed on the water spraying outer sleeve and is communicated with the water tank; and the concave flanges are arranged on two side end surfaces of the water spraying inner sleeve and the water spraying outer sleeve.

Description

Technical Field

[0001] The utility model relates to a nozzle, in particular to a cooling water annular nozzle arranged on a cooling and pressure reducing device. Background Art

[0002] CN211678311U discloses a deoxygenated water nozzle for a steam desuperheater and pressure reducer, comprising a nozzle base, and its main technical features are that a nozzle slide bar is arranged in the central cavity of the nozzle base, a pressure spring is connected to the far end of the nozzle slide bar, the pressure spring is fixed by a screw cap, and a nozzle cock is arranged near the nozzle of the nozzle slide bar. The steam flow rate at the throat of the Venturi pipe is always at a high speed, and the desuperheated water is immediately crushed by the high-speed steam after passing through the spring-adjustable nozzle, thereby ensuring a good atomization effect.

[0003] The disadvantage of this nozzle is that it needs to be equipped with a Venturi component (the nozzle needs to be arranged at the throat of the Venturi mixing pipe), which makes the structure of the entire device more complicated and increases the production cost and subsequent maintenance cost. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the above-mentioned background technology and provide a cooling water annular nozzle arranged on a cooling and pressure reducing device, which can improve the utilization rate of cooling water and has a simple structure and low cost.

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

[0006] The cooling water annular nozzle arranged on the cooling and pressure reducing device is characterized in that: the nozzle includes a circular water spray inner sleeve, a water trough arranged in an annular manner on the outer circumference of the water spray inner sleeve, a plurality of water spray holes evenly distributed in the circumferential direction of the water spray inner sleeve and respectively penetrating the inner circumferential surface of the water spray inner sleeve and the water trough at both ends, a water spray outer sleeve coaxially coated on the outer circumferential surface of the water spray inner sleeve, a water inlet pipe fixed on the water spray outer sleeve and connected to the water trough, and concave flanges arranged on the end faces of both sides of the water spray inner sleeve and the water spray outer sleeve.

[0007] The inner ring diameter of the water spray inner sleeve is compatible with the inner circle diameter of the concave flange.

[0008] A circle of flanges protruding toward the axial direction is formed on the inner annular surface of the water spray inner sleeve; the orifices of the plurality of water spray holes are arranged on the top of the flange.

[0009] In the axial cross-sectional view of the water spray inner sleeve, the edge of the flange is arc-shaped.

[0010] A sealing ring is arranged at the joint between the concave flange and the water spray inner sleeve and the water spray outer sleeve.

[0011] The beneficial effects of the utility model are:

[0012] 1. Since the cooling water is sprayed into the steam pipeline in a complete circle, 100% coverage of the inside of the steam pipeline is achieved, thus greatly improving the utilization rate of cooling water and the control accuracy of steam temperature.

[0013] 2. The elimination of the traditional Venturi tube component not only breaks the limitation of the minimum diameter of the traditional desuperheater, DN50, improves the coverage of the large and small apertures of the desuperheater, but also simplifies the structure and reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of an embodiment of the utility model.

[0015] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure of the inner sleeve of the middle water spray.

[0016] Figure 3 yes Figure 2 Schematic diagram of the right viewing direction structure.

[0017] Numbers in the figure: water spray outer sleeve 1, sealing ring 2, water spray inner sleeve 3, water spray hole 4, water inlet pipe 5, concave flange 6, water tank 7. DETAILED DESCRIPTION

[0018] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0019] The cooling water annular nozzle provided on the cooling and pressure reducing device shown in the attached drawings comprises an annular inner water spray sleeve 3 and an annular outer water spray sleeve 1 which are coaxially sleeved together; a water trough 7 is arranged on the outer circumferential surface of the inner water spray sleeve (the water trough is arranged along the circumferential direction and connected end to end to form an annular shape); a plurality of water spray holes 4 are evenly distributed in the circumferential direction of the inner water spray sleeve and the orifices at both ends of the water spray holes respectively penetrate the inner circumferential surface of the inner water spray sleeve and the water trough; the outer water spray sleeve is coaxially covered on the outer circumferential surface of the inner water spray sleeve so that the water trough forms a A closed waterway; a water inlet pipe 5 is fixed on the water spray jacket and connected to the waterway to provide cooling water to the nozzle during operation; a concave flange 6 is also provided on each end face of the water spray inner jacket and the water spray outer jacket (as can be seen from the figure, the inner ring diameter of the water spray inner jacket is consistent with the inner circle diameter of the concave flange; to ensure the smoothness of the steam flow channel), so as to facilitate direct installation on the temperature and pressure reducer; a sealing ring 2 is provided at the joint of the concave flange, the water spray inner jacket and the water spray outer jacket to ensure that the nozzle will not leak.

[0020] Furthermore, a circle of flanges protruding in the axial direction is formed on the inner annular surface of the water spray inner sleeve, so that the effect of a Venturi tube can be obtained; the water outlet openings of the plurality of water spray holes are arranged on the top of the flange, which can enhance the mixing effect of the cooling water and the steam flowing therethrough.

[0021] In the axial cross-sectional view of the water spray inner sleeve, the edge of the flange is arc-shaped.

Claims

1. The cooling water annular nozzle provided on the cooling and pressure reducing device is characterized by: The nozzle comprises a circular water spray inner sleeve (3), a water groove (7) arranged in an annular manner on the outer circumference of the water spray inner sleeve, a plurality of water spray holes (4) evenly distributed in the circumferential direction of the water spray inner sleeve and respectively penetrating the inner circumferential surface of the water spray inner sleeve and the water groove at both ends, a water spray outer sleeve (1) coaxially covering the outer circumferential surface of the water spray inner sleeve, a water inlet pipe (5) fixed on the water spray outer sleeve and connected to the water groove, and concave flanges (6) arranged on the end surfaces of both sides of the water spray inner sleeve and the water spray outer sleeve.

2. The cooling water annular nozzle provided on the cooling and pressure reducing device according to claim 1 is characterized in that: The inner ring diameter of the water spray inner sleeve is compatible with the inner circle diameter of the concave flange.

3. The cooling water annular nozzle provided on the cooling and pressure reducing device according to claim 2 is characterized in that: A circle of flanges protruding toward the axial direction is formed on the inner annular surface of the water spray inner sleeve; the orifices of the plurality of water spray holes are arranged on the top of the flange.

4. The cooling water annular nozzle provided on the cooling and pressure reducing device according to claim 3 is characterized in that: In the axial cross-sectional view of the water spray inner sleeve, the edge of the flange is arc-shaped.

5. The cooling water annular nozzle provided on the cooling and pressure reducing device according to claim 4 is characterized in that: A sealing ring (2) is provided at the joint between the concave flange and the inner water spray sleeve and the outer water spray sleeve.

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