CN212055958U

CN212055958U - Reversing valve for waste heat recovery system

Info

Publication number: CN212055958U
Application number: CN202020470299.8U
Authority: CN
Inventors: 郭瑛
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-12-01
Anticipated expiration: 2030-04-03

Abstract

The utility model belongs to the technical field of heat energy development utilizes, concretely relates to reversing valve for waste heat recovery system. The valve comprises a valve body, wherein the valve body comprises a vertical channel and a horizontal channel vertically communicated with the vertical channel; the upper end port and the lower end port of the vertical channel are closed, and through ports are arranged on the side wall of the vertical channel and positioned on two sides of the horizontal channel; flanges are arranged on the through port of the vertical channel and the port of the horizontal channel; a valve seat is arranged in the vertical channel and between the horizontal channel and the through opening; one end of the vertical channel is provided with a sealing element, a valve rod penetrates through the sealing element part and extends into the vertical channel, and one end of the valve rod is connected with a driving device; the valve rod is connected with a valve core, and the valve core is matched with the valve seat. The utility model has the advantages of simple structure and reasonable design, be fit for using widely.

Description

Reversing valve for waste heat recovery system

Technical Field

The utility model belongs to the technical field of heat energy development utilizes, concretely relates to reversing valve for waste heat recovery system.

Background

In the energy-saving combustion design, a heat accumulator waste heat recycling technology is commonly used. Firstly, high-temperature flue gas after combustion is sucked into a heat accumulator A to exchange heat with a heat accumulator in the heat accumulator A, the heat accumulator is heated, the flue gas is sucked away by a draught fan after being cooled and is sent to a flue gas treatment system, and then the flue gas is emptied. After the duration of about dozens of seconds, the high-temperature flue gas turns to enter another heat accumulator B, cold air is blown into the heat accumulator A to exchange heat with a heat accumulator in the heat accumulator A, the heat accumulator is cooled, and the heat energy of the heat accumulator reserved by the high-temperature flue gas is brought back to the combustion system after the air is heated. After another dozens of seconds, the flowing direction of the high-temperature flue gas and the cold air is changed to realize the conversion of heat storage and heat release.

The implementation of the energy-saving combustion system requires alternate reversing of flue gas and air. Normally, 4 pneumatic or electric valves are needed for program control operation, and the most traditional method is not only more large valves and expensive, but also more complex in control system.

A four-way valve is also adopted, the four-way valve is respectively communicated with a heat accumulator A, a blower, a heat accumulator B and a draught fan in sequence, and a valve core of the four-way valve rotates for 90 degrees in due time according to program control to realize reversing. The reversing method has the advantages that only one reversing valve is used; the first disadvantage is that air is positive pressure, and smoke is negative pressure, so that air is easy to be mixed in the valve; the second disadvantage is that the heat accumulators A, B are often installed at a certain distance and communicated to a valve in a centralized manner, the alternative and reverse general pipelines of flue gas and air are long, after reversing, the air can blow the flue gas retained in the long pipeline into the combustion system, and the combustion temperature of the system is reduced, and in the same common pipeline with the long other end, the cold air retained in the pipeline is brought into the heat accumulators by the high-temperature flue gas, so that the heat accumulation effect of the heat accumulators is influenced.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.

In order to achieve the purpose, the utility model provides a reversing valve for a waste heat recovery system, which comprises a valve body, wherein the valve body comprises a vertical channel and a horizontal channel vertically communicated with the vertical channel; the upper end port and the lower end port of the vertical channel are closed, and through ports are arranged on the side wall of the vertical channel and positioned on two sides of the horizontal channel; flanges are arranged on the through port of the vertical channel and the port of the horizontal channel; a valve seat is arranged in the vertical channel and between the horizontal channel and the through opening; one end of the vertical channel is provided with a sealing element, a valve rod penetrates through the sealing element part and extends into the vertical channel, and one end of the valve rod is connected with a driving device; the valve rod is connected with a valve core, and the valve core is matched with the valve seat.

Further, the sealing element comprises a sealing gland, a sealing sleeve and a sealing ring; the top surface and the bottom surface of the sealing ring are inclined planes, the sealing ring is nested in the sealing sleeve, and the sealing gland is inserted in the sealing sleeve and is positioned above the sealing ring; the contact surface of the seal sleeve and the bottom surface of the seal ring is an inclined plane; the contact surface of the sealing gland and the top surface of the sealing ring is an inclined plane; the sealing gland and the sealing sleeve are provided with through holes, and the sealing gland and the sealing sleeve are connected through bolts.

The valve rod passes through the sealing gland, the sealing sleeve and the sealing ring, and the inner wall of the sealing ring is tightly attached to the valve rod, so that the air tightness in the valve body is ensured. When the clearance between the long-time motion of valve rod and the sealing ring increases, or when the long-term expend with heat and contract with cold sealing performance of sealing ring body worsens. By screwing the bolt, the sealing gland is inserted into the sealing sleeve to further extrude the sealing ring; because the two end faces of the sealing ring and the contact faces of the sealing gland and the sealing ring are inclined planes, the sealing ring contracts inwards in the extrusion process of the sealing gland, so that the sealing ring and the valve rod continue to keep sealing fit.

Furthermore, the center of the valve core is connected with a steel plate through a screw, and the steel plate is connected with the valve rod in a welding mode. The valve rod is welded with the steel plate, and the valve core is conveniently taken down to replace or repair after the valve core is abraded seriously.

Further, one end of the valve rod is in a threaded structure, the driving device is an air cylinder, and the valve rod is connected with a piston rod of the air cylinder through the threaded structure. The piston rod of the cylinder stretches out and draws back and drives the valve rod to move, and the adjustment of the flow direction of the reversing valve is achieved.

Further, the edge of the valve core is conical; the valve seat is a metal ring arranged on the inner wall of the vertical channel of the valve body.

Further, the through opening is perpendicular to the vertical channel.

Compared with the prior art, the utility model has the advantages that:

the utility model provides a reversing valve for a waste heat recovery system; the problems that the existing waste heat recovery system adopts a single valve to control the system, the cost is high, and the control is complex are solved; the adoption of the four-way valve has the problems of easy gas leakage and poor heat exchange efficiency. The utility model discloses the valve body adopts the tee bend structure, adopts cylinder drive pull formula valve rod to realize the switching-over of route. The utility model has the advantages of simple structure and reasonable design, be fit for using widely.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a schematic structural diagram of the valve core.

Fig. 4 is a top view of fig. 3.

Fig. 5 is a schematic view of the structure of the valve seat.

Fig. 6 is a schematic structural view of the sealing member.

Fig. 7 is a schematic view of the installation and use of the present invention.

In the figure: 1-a valve body; 101-through port; 102-horizontal channel; 103-vertical channel; 2-a valve stem; 3-a valve core; 4-valve seat; 5-a seal; 501-sealing sleeve; 502-a seal ring; 503-bolt; 504-sealing gland; 6-a flange; 7-a blower; 8-induced draft fan; 9-a second regenerator; 10-; 11-; 12-.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

Please refer to fig. 1 to 7. It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The utility model provides a technical scheme: a reversing valve for a waste heat recovery system is shown in figures 1 and 2 and comprises a valve body 1, wherein the valve body 1 is a seamless welded tee joint, and the valve body 1 comprises a vertical channel 103 and a horizontal channel 102 vertically communicated with the vertical channel 103; the upper end and the lower end of the vertical channel 103 are closed, and through openings 101 are arranged on the side wall of the vertical channel 103 and positioned on two sides of the horizontal channel 102 in a penetrating manner. Flanges 6 are arranged on the port 101 of the vertical channel 103 and the port of the horizontal channel 102. A valve seat 4 is arranged in the vertical channel 103 and between the horizontal channel 102 and the through opening 101; one end of the vertical channel 103 is provided with a sealing piece 5, a valve rod 2 penetrates through the sealing piece 5 to partially extend into the vertical channel 103, and one end of the valve rod 2 is connected with a driving device; the valve rod 2 is connected with a valve core 3, and the valve core 3 is matched with the valve seat 4. The valve rod 2 is processed by the external surface of a thick-wall seamless pipe and is processed by chrome plating, and one end of the valve rod is processed with a screw thread and is used for connecting with a pneumatic cylinder.

As shown in fig. 3 and 4, a steel plate 301 is connected to the center of the valve body 3 by a screw, and the steel plate 301 is welded to the valve rod 2. The valve core 3 is a high-strength iron casting (non-deforming) formed by machining, and the steel plate 301 is a common carbon steel plate. The edge of the valve core 3 is conical. The upper edge and the lower edge of the valve core 3 are inclined planes with certain inclination angles, and the machining precision, the ovality and the smoothness are particularly noticed.

As shown in fig. 5, the valve seat 4 is a metal ring disposed on the inner wall of the vertical passage 103 of the valve body 1. The axis of the valve seat 4 is parallel to the vertical duct 103. The valve seat 4 is a machined alloy steel plate ring, and the edge of an inner hole of the valve seat is linearly sealed with the valve core 3. The machining precision, ovality and smoothness of the valve seat 4 are high. Otherwise, the valve core 3 and the valve seat 4 are difficult to realize a tight line seal.

As shown in fig. 6, the seal 5 includes a gland 504, a gland 501, a seal ring 502; the top surface and the bottom surface of the sealing ring 502 are inclined planes, the sealing ring 502 is nested in the sealing sleeve 501, and the sealing gland 504 is inserted and sleeved on the sealing sleeve 501 and is positioned above the sealing ring 502; the contact surface of the sealing sleeve 501 and the bottom surface of the sealing ring 502 is an inclined surface; the contact surface of the sealing gland 504 and the top surface of the sealing ring 502 is an inclined surface; through holes are formed in the sealing gland 504 and the sealing sleeve 501, and the sealing gland 504 and the sealing sleeve 501 are connected through bolts 503.

As shown in fig. 7, the using method of the present invention is: 2 reversing valves are installed in one set of waste heat recovery system and are respectively in butt joint with the low-temperature ports of the heat accumulator A and the heat accumulator B. The upper part port of the reversing valve A is communicated with the air blower through an air pipeline, the middle part port is communicated with the low-temperature port of the heat accumulator A, and the lower part port is communicated with the induced draft fan through a flue gas pipeline. An upper port of the reversing valve B is communicated with the air blower through an air pipeline, a middle port of the reversing valve B is communicated with a low-temperature port of the heat accumulator B, and a lower port of the reversing valve B is communicated with the induced draft fan through a flue gas pipeline. The valve rods and the valve cores of the two reversing valves are driven by the air cylinder to move up and down respectively.

At the same time, the valve positions of the two reversing valves are just opposite, so that the continuous air intake combustion supporting and the continuous smoke exhaust of the combustion system are implemented, and the energy-saving combustion of heat accumulation and heat release is alternately realized.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a reversing valve for waste heat recovery system which characterized in that includes: the valve body (1), the valve body (1) comprises a vertical channel (103) and a horizontal channel (102) vertically communicated with the vertical channel (103); the upper end port and the lower end port of the vertical channel (103) are closed, and through ports (101) are arranged on the side wall of the vertical channel (103) and positioned on two sides of the horizontal channel (102) in a penetrating manner; flanges (6) are arranged on the port (101) of the vertical channel (103) and the port of the horizontal channel (102); a valve seat (4) is arranged in the vertical channel (103) and between the horizontal channel (102) and the through opening (101); one end of the vertical channel (103) is provided with a sealing element (5), a valve rod (2) penetrates through the sealing element (5) and partially extends into the vertical channel (103), and one end of the valve rod (2) is connected with a driving device; the valve rod (2) is connected with a valve core (3), and the valve core (3) is matched with the valve seat (4).

2. The reversing valve for the waste heat recovery system according to claim 1, characterized in that: the sealing element (5) comprises a sealing gland (504), a sealing sleeve (501) and a sealing ring (502); the top surface and the bottom surface of the sealing ring (502) are inclined planes, the sealing ring (502) is nested in the sealing sleeve (501), and the sealing gland (504) is inserted and sleeved on the sealing sleeve (501) and is positioned above the sealing ring (502); the contact surface of the sealing sleeve (501) and the bottom surface of the sealing ring (502) is an inclined surface; the contact surface of the sealing gland (504) and the top surface of the sealing ring (502) is an inclined surface; the sealing gland (504) and the sealing sleeve (501) are provided with through holes, and the sealing gland (504) is connected with the sealing sleeve (501) through bolts (503).

3. The reversing valve for the waste heat recovery system according to claim 1, characterized in that: the center of the valve core (3) is connected with a steel plate (301) through a screw, and the steel plate (301) is connected with the valve rod (2) in a welding mode.

4. The reversing valve for the waste heat recovery system according to claim 1, characterized in that: one end of the valve rod (2) is of a screw thread structure, the driving device is an air cylinder, and the valve rod (2) is connected with a piston rod of the air cylinder through the screw thread structure.

5. The reversing valve for the waste heat recovery system according to claim 1, characterized in that: the edge of the valve core (3) is conical; the valve seat (4) is a metal ring arranged on the inner wall of the vertical channel (103) of the valve body (1).

6. The reversing valve for the waste heat recovery system according to claim 1, characterized in that: the through opening (101) is perpendicular to the vertical channel (103).