CN213901035U

CN213901035U - Temperature and pressure reducing device suitable for small flow

Info

Publication number: CN213901035U
Application number: CN202022917488.8U
Authority: CN
Inventors: 盖阔; 董�成; 郁学军
Original assignee: Wuxi Score Automatic Control Equipment Co ltd
Current assignee: Wuxi Score Automatic Control Equipment Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-08-06
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses a temperature and pressure reduction device suitable for little flow, it includes: the mounting assembly comprises a body, a circulation hole formed in the center of the body and a convex ring formed on the inner wall of the body and positioned in the circulation hole; the water spraying assembly comprises a nozzle and a water spraying flow channel, one end of the nozzle is inserted into the circulation hole, the other end of the nozzle extends out of the body, the water spraying flow channel is arranged in the nozzle and communicated with the circulation hole, and the axial line of the nozzle is perpendicular to the axial line of the circulation hole; and the flange assembly is arranged at the other end of the nozzle and is provided with a through hole communicated with the water spraying flow channel. The working condition of the temperature reduction of the low-flow steam can be met, and the problem that the direct-insertion type temperature reducer is not enough in space and is difficult to arrange is solved.

Description

Temperature and pressure reducing device suitable for small flow

Technical Field

The utility model belongs to the technical field of the desuperheater, a temperature and pressure reducing device is related to, concretely relates to temperature and pressure reducing device suitable for little flow.

Background

The steam desuperheater is controlled by a signal sent by a temperature controller and is an operating part in the temperature control system. The task of the desuperheater is to uniformly spray the water quantity corresponding to the signal received by the actuating mechanism into the steam pipeline. For industries such as power stations, small heating systems and manufacturing industries, a large number of steam pipelines exist, so that the installation space is narrow, and the installation of the steam desuperheaters on adjacent pipelines is easily influenced.

Disclosure of Invention

The utility model aims at providing a temperature and pressure reducing device suitable for small flow in order to overcome the defects of the prior art.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a temperature and pressure reducing device for small flow rates comprising:

the mounting assembly comprises a body, a circulation hole formed in the center of the body and a convex ring formed on the inner wall of the body and positioned in the circulation hole;

the water spraying assembly comprises a nozzle and a water spraying flow channel, one end of the nozzle is inserted into the circulation hole, the other end of the nozzle extends out of the body, the water spraying flow channel is arranged in the nozzle and communicated with the circulation hole, and the axial line of the nozzle is perpendicular to the axial line of the circulation hole;

and the flange assembly is arranged at the other end of the nozzle and is provided with a through hole communicated with the water spraying flow channel.

Preferably, the axis of the torus and the axis of the flow hole overlap.

Furthermore, the end face of the body is directional or circular, and the section of the convex ring is trapezoidal.

Preferably, the water spray channel comprises a first channel segment which is formed by one end of a nozzle and is inwards recessed, a second channel segment communicated with the first channel segment, a third channel segment communicated with the second channel segment, and a fourth channel segment which is communicated with the third channel segment and extends to the other end of the nozzle.

Further, the flow holes have a steam inlet end and a steam outlet end, and the first flow channel section is obliquely arranged and faces the steam outlet end; the distance between the communication part of the first flow channel section and the flow hole and the axial lead of the flow hole is smaller than the distance between the communication part of the first flow channel section and the second flow channel section and the axial lead of the flow hole.

Specifically, the diameter of the second flow path segment is smaller than the diameter of the third flow path segment and smaller than the diameter of the first flow path segment.

Specifically, the diameter of the fourth flow path segment increases gradually in a square shape from the inside to the outside of the nozzle.

Preferably, the flange assembly comprises a connecting body connected with the other end of the nozzle, a flange plate formed at the outer end of the peripheral surface of the connecting body, and a plurality of mounting holes formed in the flange plate, and the through holes are formed in the center of the connecting body.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages: the utility model is suitable for a temperature and pressure reduction device of miniflow cooperates with the flange subassembly through the installation component and the water spray subassembly that adopt specific structure, and simple structure, installation are convenient, save space, can satisfy the operating mode of miniflow steam desuperheating, have solved the problem that the direct insertion desuperheater space is not enough to be difficult to arrange.

Drawings

FIG. 1 is a schematic structural view of the temperature and pressure reducing device for small flow rate of the present invention;

FIG. 2 is a sectional view of the temperature and pressure reducing device for small flow rate of the present invention;

fig. 3 is an application schematic diagram of the temperature and pressure reducing device suitable for small flow rate.

Detailed Description

The invention will be further described with reference to examples of embodiments shown in the drawings.

The following description of the embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments in which the invention may be practiced. Directional phrases used in the present disclosure, such as "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "side," and the like, refer only to the orientation of the figure(s). Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In addition, in the description, unless explicitly described to the contrary, the word "comprise" or "comprises" should be understood to mean that including the element, but not excluding any other elements.

The temperature and pressure reducing device suitable for small flow as shown in fig. 1 to fig. 3 mainly comprises a mounting assembly 1, a water spraying assembly 2, a flange assembly 3 and the like which are matched.

The mounting assembly 1 comprises a body 11 (the body 11 can be provided with mounting holes to be matched with a flange of a steam pipeline for mounting, or can be limited in outer contour by a plurality of connecting bolts without the mounting holes), a circulation hole 12 arranged at the center of the body 11 and a convex ring 13 which is formed on the inner wall of the body 11 and is positioned in the circulation hole 12; the water spray component 2 comprises a nozzle 21 with one end inserted into the circulation hole 12 and the other end extending out of the body 11 (the connection part of the nozzle 21 and the body 11 can be fixed in a welding way) and a water spray runner 22 arranged in the nozzle 21 and communicated with the circulation hole 12, and the axial lead of the nozzle 21 is vertical to the axial lead of the circulation hole 12; the convex ring 13 is utilized to form a necking structure, which is beneficial to taking away sprayed water mist and accelerating the homogenization process of the water mist and steam through the high turbulence of the steam; meanwhile, the pressure at the necking part is reduced, and spraying of the temperature-reducing water at the nozzle is facilitated (namely a Venturi-like structure is formed, the high steam flow rate and the atomization effect at the nozzle are guaranteed, the atomized temperature-reducing water is carried to the downstream by vortex formed when steam leaves the sharp edge of the nozzle, and the rapid evaporation of the temperature-reducing water is guaranteed by the movement, so that water hammer on the pipe wall is avoided). The flange assembly 3 is installed at the other end of the nozzle 21 and has a through hole 34 communicating with the water spray flow passage 22; in the embodiment, in order to ensure good control performance and satisfactory atomization effect, the pressure difference between the steam and the temperature-reduced water should not be lower than 2bar, but should not exceed 20bar, so as to avoid erosion in the nozzle; higher pressures are only allowed for short periods of time, such as driving and stopping of the plant.

The axial lead of the convex ring 13 is overlapped with the axial lead of the circulating hole 12; the end face of the body 11 is directional or circular (in the present embodiment, the end face of the body 11 is circular); the cross-section of the convex ring 13 is trapezoidal, so that the high steam flow speed and the atomization effect at the nozzle are further improved. The water spray flow channel 22 includes a first flow channel section 221 inwardly recessed from one end of the nozzle 21, a second flow channel section 222 communicated with the first flow channel section 221, a third flow channel section 223 communicated with the second flow channel section 222, and a fourth flow channel section 224 communicated with the third flow channel section 223 and extending to the other end of the nozzle 21; in this embodiment, since the circulation holes 12 have a steam inlet end and a steam outlet end (in fig. 2, the left side is the steam inlet end, and the right side is the steam outlet end), specifically: the first flow channel section 221 is obliquely arranged and faces the steam outlet end; the distance between the communication part of the first flow path section 221 and the flow hole 12 and the axial line of the flow hole 12 is smaller than the distance between the communication part of the first flow path section 221 and the second flow path section 222 and the axial line of the flow hole 12 (that is, as shown in fig. 2, the first flow path section 221 extends from the inner part of the nozzle 21 to the lower right to communicate with the flow hole 12); and the diameter of the second flow passage section 222 is smaller than that of the third flow passage section 223 and smaller than that of the first flow passage section 221, and the diameter of the fourth flow passage section 224 is gradually increased in a square shape from the inside to the outside of the nozzle 21 (i.e., the fourth flow passage section 224 is in an inverted cone structure), so that the flow rate of the temperature-reduced water is increased to optimize the atomization effect with the steam. The flange assembly 3 includes a connecting body 31 connected to the other end of the nozzle 21, a flange plate 32 formed at an outer end of a circumferential surface of the connecting body 31, and a plurality of mounting holes 33 formed in the flange plate 32, and a through hole 34 is formed at a center of the connecting body 31 and connected to other structures through the flange plate 32.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A temperature and pressure reducing device suitable for small flow is characterized by comprising:

the mounting assembly (1) comprises a body (11), a circulation hole (12) formed in the center of the body (11), and a convex ring (13) formed on the inner wall of the body (11) and positioned in the circulation hole (12);

the water spray component (2) comprises a nozzle (21) and a water spray runner (22), wherein one end of the nozzle (21) is inserted into the circulation hole (12), the other end of the nozzle extends out of the body (11), the water spray runner is arranged in the nozzle (21) and communicated with the circulation hole (12), and the axial line of the nozzle (21) is perpendicular to the axial line of the circulation hole (12);

and the flange assembly (3) is arranged at the other end of the nozzle (21) and is provided with a through hole (34) communicated with the water spraying flow channel (22).

2. A temperature and pressure reducing apparatus for small flow rates as set forth in claim 1, wherein: the axial line of the convex ring (13) is overlapped with the axial line of the circulating hole (12).

3. A temperature and pressure reducing apparatus for small flows according to claim 1 or 2, wherein: the end face of the body (11) is directional or circular, and the section of the convex ring (13) is trapezoidal.

4. A temperature and pressure reducing apparatus for small flow rates as set forth in claim 1, wherein: the water spray flow channel (22) comprises a first flow channel section (221) which is inwards recessed from one end of the nozzle (21), a second flow channel section (222) communicated with the first flow channel section (221), a third flow channel section (223) communicated with the second flow channel section (222), and a fourth flow channel section (224) communicated with the third flow channel section (223) and extending to the other end of the nozzle (21).

5. A temperature and pressure reducing device for small flows according to claim 4, wherein: the flow holes (12) having a steam inlet end and a steam outlet end, the first flow channel section (221) being arranged obliquely and facing the steam outlet end; the distance between the communication part of the first flow channel section (221) and the circulation hole (12) and the axial line of the circulation hole (12) is smaller than the distance between the communication part of the first flow channel section (221) and the second flow channel section (222) and the axial line of the circulation hole (12).

6. A temperature and pressure reducing device for small flows according to claim 4 or 5, wherein: the second flow channel section (222) has a diameter that is smaller than the diameter of the third flow channel section (223) and smaller than the diameter of the first flow channel section (221).

7. A temperature and pressure reducing device for small flows according to claim 4 or 5, wherein: the diameter of the fourth flow path section (224) increases gradually in the direction of the nozzle (21) from the inside to the outside.

8. A temperature and pressure reducing apparatus for small flow rates as set forth in claim 1, wherein: the flange assembly (3) comprises a connecting body (31) connected with the other end of the nozzle (21), a flange plate (32) formed at the outer end of the peripheral surface of the connecting body (31) and a plurality of mounting holes (33) formed in the flange plate (32), and the through hole (34) is formed in the center of the connecting body (31).