CN212536668U

CN212536668U - Pressure-reducing blow-down valve

Info

Publication number: CN212536668U
Application number: CN202020787376.2U
Authority: CN
Inventors: 杨剑波; 朱骁骐; 董万兵
Original assignee: Wuxi Hejia Instrumentation Co ltd
Current assignee: Wuxi Hejia Instrumentation Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2021-02-12
Anticipated expiration: 2030-05-13

Abstract

The utility model discloses a step-down blowoff valve, including valve body and case, the valve body is equipped with into water runner, play water runner and cavity, into water runner and play water runner communicate with the cavity respectively, step-down blowoff valve still includes multistage disk seat, and multistage disk seat is installed in the cavity, and the movably installation of case forms the step-down runner in multistage disk seat between case and the multistage disk seat, step-down runner and cavity intercommunication, and multistage disk seat is equipped with the face of impact, and the face of impact forms the contained angle with the flow direction of step-down runner. High-pressure fluid enters the pressure reduction flow channel from the lower part, and flows reversely after impacting to the impact surface to offset the energy of the fluid, so that the aim of reducing pressure is fulfilled; the pressure reduction flow channel is vertical, so that the possibility of impurities staying in the flow channel formed by the valve core and the valve seat is reduced in principle; the flow channel is simple in form, and the flow capacity is increased; the manufacture is convenient, and the valve core can be processed and molded by using a lathe.

Description

Pressure-reducing blow-down valve

Technical Field

The utility model relates to a blowoff valve especially relates to a decompression blowoff valve.

Background

After the boiler is used for a long time, pollution discharge is needed to reduce the salt content, the alkali content and the silicic acid content in the boiler water and the content of slag in a suspended state. The sewage needs to be subjected to pressure reduction treatment before being discharged, a pressure reduction blow-down valve in the prior art is of a labyrinth type multi-stage pressure reduction structure as shown in a figure 1, and fluid flows in from the outer side, flows through a complex flow channel, enters an inner cavity and then flows to an outlet, so that the pressure of the fluid is reduced. Because the runner is complicated and bend too much, under the operating mode of dirty medium, impurity in the fluid can pile up in the runner and cause the runner to block up to influence the use of valve.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a pressure reducing blowoff valve which has the defects that impurities are not easy to accumulate in a flow channel to cause the blockage of the flow channel.

The purpose of the utility model is realized by adopting the following technical scheme:

a pressure reducing blow-down valve comprises a valve body and a valve core, wherein the valve body is provided with a water inlet flow channel, a water outlet flow channel and a cavity, the water inlet flow channel and the water outlet flow channel are respectively communicated with the cavity, the pressure reducing blow-down valve further comprises a multi-stage valve seat, the multi-stage valve seat is installed in the cavity, the valve core is movably installed in the multi-stage valve seat, a pressure reducing flow channel is formed between the valve core and the multi-stage valve seat, the pressure reducing flow channel is communicated with the cavity, the multi-stage valve seat is provided with an impact surface, and an included angle is formed between the impact surface and the flow direction.

Further, the depressurization flow channel is perpendicular to a horizontal plane.

Further, the cross section of the impact surface is an inclined surface.

Further, multistage disk seat includes main part and a plurality of buffing pad, the main part is equipped with the mouth of a river, cross the mouth of a river with the cavity intercommunication, a plurality of the buffing pad is installed in proper order, the main part install in the buffing pad top, each the buffing pad is equipped with strike the face.

Furthermore, each buffer seat comprises a seat body and a mounting boss, the mounting boss extends out from the seat body, the seat body is provided with a mounting hole, and the mounting boss is mounted in the mounting hole of the other buffer seat.

Further, the outer diameter of the mounting boss is smaller than that of the seat body.

Further, the water gap is circular, the number of water gaps is a plurality of, and a plurality of water gaps are evenly arranged in the main body.

Further, the number of the buffer seats is three.

Furthermore, the valve core is provided with a flange, and the section of the flange is an inclined plane and is positioned in front of the water flow of the depressurization flow channel.

Further, the pressure reduction blowoff valve further comprises a sealing ring, and the sealing ring is installed between the multistage valve seat and the valve body.

Compared with the prior art, the utility model discloses decompression blowoff valve has following advantage:

(1) high-pressure fluid enters the pressure reduction flow channel from the lower part, and flows reversely after impacting to the impact surface to offset the energy of the fluid, so that the purpose of reducing pressure is achieved.

(2) The pressure reduction flow passage is vertical, so that the possibility of impurities staying in the flow passage formed by the valve core and the valve seat is reduced in principle.

(3) The flow channel has simple form and increased flow capacity.

(4) The manufacture is convenient, and the valve core can be processed and molded by using a lathe.

Drawings

FIG. 1 is a schematic diagram of a prior art pressure reducing blowdown valve;

FIG. 2 is a perspective view of the pressure reducing blowoff valve of the present invention;

FIG. 3 is a cross-sectional view of the pressure reducing blow-down valve of FIG. 2;

FIG. 4 is an enlarged view at A of the pressure reducing blowdown valve of FIG. 3;

FIG. 5 is a perspective view of the multi-stage valve seat of the pressure reducing blow-down valve of FIG. 3;

FIG. 6 is a cross-sectional view of a relief seat of the multi-stage valve seat of the pressure reducing blow-down valve of FIG. 5.

In the figure: 10. a valve body; 11. a water inlet; 12. a water inlet flow channel; 13. a cavity; 14. a water outlet flow channel; 15. a water outlet; 20. a valve cover; 30. a valve core; 31. a flange; 40. a multi-stage valve seat; 41. a main body; 410. a water outlet; 42. a buffer seat; 420. a base body; 421. mounting a boss; 422. an impact surface; 423. mounting holes; 50. a seal ring; 60. a pressure reducing flow passage.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 6, in order to illustrate an embodiment of the pressure reducing blowdown valve of the present invention, the pressure reducing blowdown valve includes a valve body 10, a valve cover 20, a valve core 30, a multi-stage valve seat 40, and a sealing ring 50.

The valve body 10 is provided with a water inlet 11, a water inlet flow passage 12, a cavity 13, a water outlet flow passage 14 and a water outlet 15. The water inlet 11 is located at the end of the inlet channel 12 and communicates with the inlet channel 12. The water outlet 15 is located at the end of the water outlet channel 14 and is communicated with the water outlet channel 14. The cavity 13 is located between the inlet channel 12 and the outlet channel 14 and is communicated with the inlet channel 12 and the outlet channel 14. The water inlet channel 12 and the water outlet channel 14 are parallel to each other and are inclined channels.

The valve core 30 is provided with a flange 31, and the section of the flange 31 is a slope. The flange 31 is inclined inwardly.

The number of the flanges 31 is two.

The multistage valve seat 40 includes a body 41 and a plurality of relief seats 42. The main body 41 is provided with a plurality of water passing ports 410. Each of the watering openings 410 has a circular shape. The plurality of water passing openings 410 are uniformly distributed on the circumference of the main body 41. Each buffer seat 42 includes a seat body 420 and a mounting boss 421. The mounting boss 421 extends from the end of the housing 420. The outer diameter of the mounting boss 421 is smaller than the outer diameter of the seat body 420. The base 420 has a hollow structure, and the inner wall of the base 420 is provided with an impact surface 422 and a mounting hole 423. Impact surface 422 is a beveled surface.

When the decompression blowdown valve is assembled, the buffer seat 42 is installed in the cavity 13, and the sealing ring 50 is located between the buffer seat 42 and the valve body 10. The mounting bosses 421 of the lower cushion socket 42 are received in the mounting holes 423 of the upper cushion socket 42. A plurality of buffer seats 42 are installed in sequence. In the present embodiment, the number of the cushion sockets 42 is three. The body 41 is mounted on the upper end of the buffer base 42. The valve element 30 partially extends into the multi-stage valve seat 40, and a pressure reducing flow passage 60 is formed between the valve element 30 and the multi-stage valve seat 40. The depressurisation flow channel 60 is perpendicular to the horizontal plane. The flange 31 and the impact surface 422 are now located on both sides of the depressurisation channel 60. The bonnet 20 is fixed to the valve body 10 to prevent the spool 30 from bouncing.

When the pressure-reducing blow-down valve is used, high-pressure fluid enters the pressure-reducing blow-down valve from the water inlet 11, flows into the bottom of the cavity 13 through the water inlet flow channel 12, flows into the pressure-reducing flow channel 60 from the lower part, and flows in the reverse direction after impacting the impact surface 422 and the flange 31, so that the energy of the fluid is counteracted, and the purpose of reducing the pressure is achieved. The fluid after pressure reduction flows into the water outlet flow channel 14 from the water outlet 410 and flows out of the pressure reduction blowdown valve from the water outlet 15.

With the above design, the depressurization flow path 60 is vertical, and the possibility of impurities staying in the flow path formed by the valve element 30 and the multistage valve seat 40 is reduced in principle. The flow channel has simple form and increased flow capacity. The manufacture is convenient, and the valve core 30 can be processed and molded by using a lathe

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, all according to the equivalent modifications and evolutions of the present invention, which are made to the above embodiments by the essential technology, and all belong to the protection scope of the present invention.

Claims

1. The utility model provides a decompression blowoff valve, includes valve body and case, the valve body is equipped with into water runner, play water runner and cavity, into water runner and play water runner respectively with cavity intercommunication, its characterized in that: the pressure reduction blowoff valve further comprises a multi-stage valve seat, the multi-stage valve seat is arranged in the cavity, the valve core is movably arranged in the multi-stage valve seat, a pressure reduction flow passage is formed between the valve core and the multi-stage valve seat and is communicated with the cavity, the multi-stage valve seat is provided with an impact surface, and an included angle is formed between the impact surface and the flow direction of the pressure reduction flow passage.

2. The pressure reducing blowdown valve of claim 1, wherein: the pressure reduction flow channel is vertical to the horizontal plane.

3. The pressure reducing blowdown valve of claim 1, wherein: the section of the impact surface is an inclined surface.

4. The pressure reducing blowdown valve of claim 1, wherein: the multistage valve seat comprises a main body and a plurality of buffer seats, the main body is provided with a water passing port, the water passing port is communicated with the cavity, the buffer seats are sequentially installed, the main body is installed above the buffer seats, and each buffer seat is provided with the impact surface.

5. The pressure reducing blowdown valve of claim 4, wherein: each buffer seat comprises a seat body and a mounting boss, the mounting boss extends out from the seat body, the seat body is provided with a mounting hole, and the mounting boss is mounted in the mounting hole of the other buffer seat.

6. The pressure reducing blowdown valve of claim 5, wherein: the outer diameter of the mounting boss is smaller than that of the base body.

7. The pressure reducing blowdown valve of claim 4, wherein: the water passing openings are circular, the number of the water passing openings is multiple, and the water passing openings are evenly formed in the main body.

8. The pressure reducing blowdown valve of claim 4, wherein: the number of the buffer seats is three.

9. The pressure reducing blowdown valve of claim 1, wherein: the valve core is provided with a flange, and the section of the flange is an inclined plane and is positioned in front of the water flow of the pressure reduction flow channel.

10. The pressure reducing blowdown valve of claim 1, wherein: the pressure reduction blowoff valve further comprises a sealing ring, and the sealing ring is installed between the multistage valve seat and the valve body.