Two-stage large-range flow desuperheating water nozzle

Abstract

The utility model relates to a nozzle, and aims to provide a two-stage desuperheating water nozzle with large-range flow, which can be effectively applied to occasions with large desuperheating water flow change. According to the technical scheme, the two-stage large-range flow desuperheating water nozzle comprises a desuperheating water pipe and a nozzle body which is installed at one end of the desuperheating water pipe in a penetrating mode and is in a rotary body shape. The nozzle is characterized in that the outer side end face of the nozzle body is coaxially and axially movably positioned with a large-flow nozzle head connected with a sliding rod, and the nozzle body is provided with a plurality of second-stage flow channels penetrating through the two end faces of the nozzle body; a small-flow nozzle head and a plurality of first-stage runners which are formed in the large-flow nozzle head and are communicated with the second-stage runner are coaxially fixed at the end part of the outer side of the large-flow nozzle head; the sliding rod overhangs in the attemperation water pipe from the end face of the inner side of the nozzle body, and force is applied to the nozzle body through the nozzle spring, so that the large-flow nozzle sprayer tends to move into the attemperation water pipe.

Description

Technical Field

[0001] The utility model relates to a nozzle, in particular to a two-stage large-range flow rate cooling water nozzle arranged on a cooling and pressure reducing device. Background Art

[0002] CN210979804U discloses a desuperheating water nozzle, including a desuperheating water regulating device, a main steam pipe, a pressure regulating feedback device and a connecting device, wherein the main steam pipe is connected to the connecting device, the connecting device is connected to the desuperheating water regulating device, the connecting device is connected to the pressure regulating feedback device, and the desuperheating water regulating device, the main steam pipe and the pressure regulating feedback device are connected via the connecting device. However, the nozzle needs to be equipped with many components such as a pressure regulating feedback device and a desuperheating water regulating valve, resulting in a complex structure, high manufacturing cost and maintenance cost, and further improvement is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned background technology and provide a two-stage large-range flow rate cooling water nozzle, which can be effectively applied to occasions where the cooling water flow rate varies greatly.

[0004] The technical solution provided by the utility model is:

[0005] A two-stage large-range flow rate cooling water nozzle comprises a cooling water pipe and a nozzle body in the shape of a rotating body which is inserted and installed at one end of the cooling water pipe;

[0006] The characteristics are as follows: the outer end face of the nozzle body is coaxially and axially movable to position a large-flow nozzle head connected to a sliding rod, and the nozzle body is provided with a plurality of secondary flow channels penetrating its two end faces; the outer end of the large-flow nozzle head is coaxially fixed with a small-flow nozzle head and a plurality of primary flow channels opened on the large-flow nozzle head and connected to the secondary flow channels; the sliding rod is cantilevered from the inner end face of the nozzle body into the cooling water pipe, and a force is applied to the nozzle body through a nozzle spring so that the large-flow nozzle head has a tendency to move into the cooling water pipe.

[0007] The outer end surface of the nozzle body is formed with a concave cavity to accommodate cooling water, and the inner end surface of the large flow nozzle head is formed into a conical surface matching the mouth edge of the cavity, thereby forming the injection port of the large flow nozzle.

[0008] The small flow rate nozzle is an umbrella-shaped cone, and the outlet of the primary flow channel is aligned with the arc surface of the cone.

[0009] The end of the slide rod facing away from the large-flow nozzle nozzle passes through the nozzle body and is cantilevered in the inner cavity of the cooling water pipe and is sleeved with the nozzle spring. The pressure regulating sleeve is sleeved on the slide rod and presses the nozzle spring toward the nozzle body. The nut that cooperates with the slide rod thread applies pressure to the pressure regulating sleeve to prevent it from retreating.

[0010] The large flow nozzle includes a large flow nozzle head and a plurality of secondary flow channels opened on the nozzle body; the small flow nozzle includes a small flow nozzle head and a plurality of primary flow channels opened on the large flow nozzle head.

[0011] The working principle of the utility model is that when the small flow nozzle is working, the cooling water is sprayed onto the nozzle of the small flow nozzle through the primary flow channel and then dispersed and atomized to cool the small flow steam; when the steam volume increases and the corresponding required cooling water volume increases significantly, the pressure after the cooling water is increased compresses the nozzle spring and then opens the injection port of the large flow nozzle, thereby starting the large flow nozzle to work.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model is provided with two nozzles, so that it can effectively handle the cooling water flow rate from 1T / h to 15T / h, and is suitable for working conditions where the cooling water flow rate varies greatly.

[0014] 2. The utility model has a simple structure, is easy to manufacture, and has a low cost; it has a broad market prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a main structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 It is a right view structural schematic diagram of an embodiment of the utility model.

[0017] Figure 3 yes Figure 1 Schematic diagram of the working state of the large flow nozzle in the embodiment.

[0018] Numbers in the figure: cooling water pipe 1, nut 2, pressure regulating sleeve 3, nozzle spring 4, large flow nozzle head 5, sliding rod 5-1, nozzle body 6, small flow nozzle head 7, primary flow channel 8, cavity 9, secondary flow channel 10. DETAILED DESCRIPTION

[0019] The following is a further description with reference to the embodiments shown in the accompanying drawings.

[0020] The two-stage large-range flow rate cooling water nozzle shown in the attached drawings comprises a cooling water pipe 1 and a nozzle body 6 installed (shown in the figure as being threadedly connected) at the outlet of the cooling water pipe and in the shape of a rotating body; the above structure is similar to the existing cooling water nozzle.

[0021] The improvement of the utility model is: the large flow nozzle head 5 connected with the slide rod 5-1 is coaxially arranged on the nozzle body and can move axially on the nozzle body; the large flow nozzle head is blocked on the outer end face of the nozzle body, and a plurality of secondary flow channels 10 are opened in the nozzle body and penetrate the two end faces of the nozzle body, thereby forming a large flow nozzle. The slide rod is cantilevered from the inner end face of the nozzle body into the cooling water pipe, and the nozzle spring 4 applies force to the slide rod, so that the large flow nozzle head has a tendency to move into the cooling water pipe. The small flow nozzle head 7 is fixed on the outer end of the large flow nozzle head, and a plurality of primary flow channels 8 are opened on the large flow nozzle head and connected to the secondary flow channels, thereby forming a small flow nozzle.

[0022] Furthermore, the outer end surface of the nozzle body is formed with a cavity 9 for accommodating cooling water, and the inner end surface of the large flow nozzle head is formed into a conical surface matched with the mouth edge of the cavity, thereby forming an injection port of the large flow nozzle; when working, the cooling water input into the cavity through the primary flow channel can be directly ejected outward from the gap between the outer circumferential edge of the large flow nozzle head and the mouth edge of the cavity (see Figure 3 ).

[0023] The small flow nozzle head is an umbrella-shaped cone, and the outlet of the primary flow channel is aligned with the arc surface of the cone; when working, the cooling water output from the outlet of the primary flow channel can be directly dispersed and atomized after being sprayed on the small flow nozzle head.

[0024] The end of the slide rod facing away from the large-flow nozzle nozzle passes through the nozzle body and is cantilevered in the inner cavity of the cooling water pipe. The nozzle spring is sleeved on the slide rod, and the pressure regulating sleeve 3 is sleeved on the slide rod and applies force (toward the nozzle body) to the nozzle spring. The nut 2 that cooperates with the slide rod thread applies pressure to the pressure regulating sleeve to prevent the pressure regulating sleeve from retreating.

[0025] Application description of the utility model on the temperature and pressure reducing device:

[0026] 1. After the cooling water enters the nozzle, it passes through the flow channel and is sprayed onto the small flow nozzle, and then dispersed and atomized to cool the small flow steam; the amount of water at this time can be customized according to the size of the first-level flow channel; the corresponding injection pressure is 0.3Mpa, and the water volume can be controlled below 1T / h (specific design depends on the actual working conditions).

[0027] 2. During formal operation, the amount of steam gradually increases, and the corresponding amount of cooling water required also increases significantly; at this time, the amount of cooling water and pressure can be increased by increasing the opening of the front-end regulating valve; when the cooling water pressure difference exceeds 0.3Mpa, the injection spring is compressed and the large-flow nozzle is opened; at this time, the corresponding large-flow cooling water can be designed, and the water volume can reach about 15T / h.

Claims

1. A two-stage large-range flow rate cooling water nozzle, comprising a cooling water pipe (1), and a nozzle body (6) in the shape of a rotating body and inserted and installed at one end of the cooling water pipe; Features: The outer end face of the nozzle body is coaxially and axially movable with a large flow nozzle head (5) connected to a slide rod (5-1), and the nozzle body is provided with a plurality of secondary flow channels (10) penetrating its two end faces; the outer end of the large flow nozzle head is coaxially fixed with a small flow nozzle head (7) and a plurality of primary flow channels (8) provided on the large flow nozzle head and connected to the secondary flow channels; the slide rod is cantilevered from the inner end face of the nozzle body into the cooling water pipe, and a force is applied to the nozzle body through a nozzle spring (4) so ​​that the large flow nozzle head has a tendency to move into the cooling water pipe.

2. The two-stage large-range flow rate cooling water nozzle according to claim 1 is characterized in that: The outer end surface of the nozzle body is formed with a cavity (9) for accommodating cooling water, and the inner end surface of the large flow nozzle head is formed into a conical surface matching the mouth edge of the cavity, thereby forming a spray port of the large flow nozzle.

3. The two-stage large-range flow rate cooling water nozzle according to claim 2 is characterized in that: The small flow rate nozzle is an umbrella-shaped cone, and the outlet of the primary flow channel is aligned with the arc surface of the cone.

4. The two-stage large-range flow rate cooling water nozzle according to claim 3 is characterized in that: The end of the slide rod facing away from the large flow nozzle nozzle passes through the nozzle body and is cantilevered in the inner cavity of the cooling water pipe and is sleeved with the nozzle spring. The pressure regulating sleeve (3) is sleeved on the slide rod and presses the nozzle spring toward the nozzle body. The nut (2) that is threadedly matched with the slide rod applies pressure to the pressure regulating sleeve to prevent it from retreating.

5. The two-stage large-range flow rate cooling water nozzle according to claim 4 is characterized in that: The large flow nozzle includes a large flow nozzle head and a plurality of secondary flow channels opened on the nozzle body; the small flow nozzle includes a small flow nozzle head and a plurality of primary flow channels opened on the large flow nozzle head.

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