CN214946579U

CN214946579U - Three-way valve

Info

Publication number: CN214946579U
Application number: CN202121528833.7U
Authority: CN
Inventors: 邓伟
Original assignee: Sichuan Tainuo Fluid Control Technology Co ltd
Current assignee: Sichuan Tainuo Fluid Control Technology Co ltd
Priority date: 2021-07-06
Filing date: 2021-07-06
Publication date: 2021-11-30
Anticipated expiration: 2031-07-06

Abstract

In order to solve the technical problem of poor safety of the conventional three-way valve, the embodiment of the utility model discloses a three-way valve, which comprises a three-way valve body, wherein an upper valve seat of the three-way valve body is nested in a valve seat support ring, and a welding ring is arranged on the surface of the nested connection part of the upper valve seat and the valve seat support ring; therefore, the embodiment of the utility model discloses an adopt the screw thread to add welded mode through going up disk seat and disk seat support ring, played the effect that makes the disk seat be connected with the disk seat support ring and stabilize to the holistic security of three-way valve has been strengthened.

Description

Three-way valve

Technical Field

The utility model relates to a three-way valve.

Background

At present, high-pressure water supply systems are basically designed for domestic thermal power generating units to improve the heat efficiency, the performance requirements of equipment and valves of various systems of auxiliary systems of the large thermal power generating units are high, the working temperature of a high-pressure three-way valve of a boiler water supply system of a 600MW thermal power generating unit is 280 ℃, and the working pressure is 35.0 MPa. The parameters have higher requirements than those of a supercritical unit, and the valve is required to have better flow characteristics and higher running reliability.

The high-pressure heater is an important part of a thermal power generating set and a nuclear power generating set, and has the main functions of heating feed water by using steam extracted from the last stage of a steam turbine, realizing regenerative cycle and improving the generating efficiency of the set. When the high-pressure heater breaks down or needs to be isolated, the detection device sends a signal to close the main circuit of the high-pressure three-way valve and emergently switch the water supply to the bypass, so that the safety of the high-pressure heater is guaranteed, and the high-pressure heater is protected.

The high pressure heater inner tube bundle is cut off the high water side in time, fast when leaking in the high pressure heater three-way valve, prevents that the high pressure from continuing to leak and to the erodeing of tube bundle to guarantee not to return water to the steam turbine, and normally supply water to the boiler in order to maintain the continuous operation of unit, guarantee simultaneously that the high pressure adds keeps apart the water side reliably when inspection or maintenance.

At present, the existing high pressure three-way valve has poor safety.

SUMMERY OF THE UTILITY MODEL

For solving the relatively poor technical problem of current three-way valve security, the utility model provides a three-way valve.

The embodiment of the utility model provides a realize through following technical scheme:

the three-way valve comprises a three-way valve body, wherein an upper valve seat of the three-way valve body is nested in a valve seat support ring, and a welding ring is arranged on the surface of the nested connection position of the upper valve seat and the valve seat support ring.

Optionally, the valve rod of the three-way valve body is connected with an electric connecting rod, and the electric connecting rod is used for externally connecting electric equipment.

Optionally, the valve stem is provided with a rectangular block, which is connected with the valve flap.

Optionally, a conical tip is arranged on the rectangular block, and the conical tip is arranged on the central line of the valve rod.

Optionally, a guide cylinder is arranged in the water inlet chamber of the three-way valve, a guide hole is formed in the guide cylinder, and the guide hole is of a rectangular structure.

Optionally, the valve cover of the three-way valve body is hermetically connected with the valve body through a sealing structure, and the sealing structure comprises a four-open-ring gland, four open rings, a sealing ring clamping ring and a valve cover sealing ring; the four-open-ring gland, the four-open ring, the sealing ring pressing ring and the valve cover sealing ring are sequentially connected.

Optionally, a manual switch device is arranged on the electric equipment.

Optionally, a first clamping block and a first clamping opening are arranged on the outer side of the valve seat support ring; a second clamping block and a second bayonet are arranged on the outer side of the upper valve seat; the first clamping block is used for being connected with the second bayonet in a clamping manner; the second clamping block is used for being connected with the first bayonet in a buckling mode; the first fixture block is a plurality of arc-shaped pieces arranged on the inner side wall of the valve seat support ring at intervals.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model discloses a three-way valve through will go up disk seat and disk seat support ring and adopt the screw thread to add welded mode, has played the effect that makes the disk seat be connected firmly with the disk seat support ring to the holistic security of three-way valve has been strengthened.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of a three-way valve.

Fig. 2 is a partial enlarged view of S in fig. 1.

Fig. 3 is a schematic structural view of the guide shell.

Fig. 4 is a schematic cross-sectional view of a-a in fig. 3.

Fig. 5 is a schematic view of the connection structure of the valve stem and the valve flap.

Fig. 6 is a schematic structural view of the valve seat support ring.

Fig. 7 is a structural schematic view of the upper valve seat.

FIG. 8 is a schematic view of the combined structure of the seat support ring of FIG. 6 and the upper seat of FIG. 7.

FIG. 9 is a top view of the seat support ring.

Reference numbers and corresponding part names in the drawings:

the valve comprises a valve rod 1, a support 2, a four-way opening ring 3, a valve cover 4, a copper sleeve 5, an upper valve seat 6, a valve clack 7, a lower valve seat 8, a guide cylinder 9, a valve body 10, a valve seat support ring 11, a sealing ring 12, a sealing ring pressing ring 13, a four-way opening ring pressing cover 14, a manual switching device 15, an electric connecting rod 16, a welding ring 17, a guide hole 18, a split nut 19, a rectangular block 20, a conical tip 21, a support beam 22, a first clamping block 23 and a first clamping opening 24; 25-a second clamping block, 26-a second clamping opening and 27-an arc-shaped piece.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

Referring to fig. 1, the three-way valve comprises a three-way valve body, wherein an upper valve seat of the three-way valve body is nested in a valve seat support ring, and a welding ring is arranged on the surface of the nested connection position of the upper valve seat and the valve seat support ring.

Referring to fig. 1, a three-way valve includes a three-way valve body including a valve body, a valve stem 1, and a valve flap 7; the valve rod is connected with the valve clack, and the upper end of the valve rod is used for connecting an electric connecting rod; the valve body is provided with a water inlet chamber, and the valve clack is arranged in the water inlet chamber.

The valve body includes disk seat 6 and lower disk seat 8, goes up and forms first inlet chamber between disk seat and the valve gap, forms the second inlet chamber between lower disk seat and the last disk seat, and three sides of valve body are equipped with the opening respectively. When water enters from the left opening and the valve rod drives the valve clack 7 to move upwards, the water enters the second water inlet chamber and then flows out from the opening at the lower side; when water enters from the opening on the right side, the valve rod drives the valve clack to move downwards, and then the water enters the first water inlet chamber and then enters the second water inlet chamber to flow out from the opening on the right side.

The valve seat support ring 11 is in threaded connection with the valve body 10 and is arranged between the first water inlet chamber and the second water inlet chamber; in order to ensure the tightness of the two inlet chambers, as shown in fig. 6 to 9, the outer surface of the seat support ring 11 is screwed into the valve body 10, and the upper seat 6 is nested in the seat support ring 11. The upper surface of the nesting joint of the upper valve seat 6 and the valve seat support ring 11 is welded with a welding ring 17, and the upper surfaces of the upper valve seat 6 and the valve seat support ring 11 are connected into a whole through the welding ring 17. Therefore, the sealing performance is guaranteed, and meanwhile, the disassembly is convenient.

Optionally, a first clamping block 23 and a first clamping opening 24 are arranged on the outer side of the valve seat support ring 11; a second clamping block 25 and a second clamping opening 26 are arranged on the outer side of the upper valve seat 6; the first clamping block is used for being connected with the second bayonet in a clamping manner; the second clamping block is used for being connected with the first bayonet in a buckling mode; the first fixture block is a plurality of arc-shaped pieces 27 arranged on the inner side wall of the valve seat support ring at intervals.

For the convenience of use, the valve rod of the three-way valve body is connected with an electric connecting rod 16 which is used for externally connecting electric equipment.

The valve rod is connected with the electric connecting rod, and the electric connecting rod drives the valve rod to move up and down through the electric equipment, so that the automatic opening and closing of the three-way valve are realized, and the control is more convenient.

In order to facilitate manual switching, a manual switching device 15 is optionally provided on the electric device.

To further enhance the safety of the three-way valve, the valve stem is optionally provided with a rectangular block 20, which is connected to the valve flap.

Through setting up rectangular block 20 on the valve rod, the rectangular block is connected with valve clack 7 to when the water pressure of the rivers that get into the three-way valve is higher, the valve clack is owing to be connected with the valve rod through the rectangular block, thereby has avoided the valve clack under the impact of rivers, and the valve rod that leads to rotates, thereby has avoided because rivers effect, and the three-way valve that leads to is opened in the automation under the rivers impact, has avoided the leakage of water, has strengthened the security of valve.

Alternatively, the rectangular block is secured to the flap by a split nut 19.

In order to facilitate the valve flap to be always positioned on the central axis of the valve stem, optionally a conical tip 21 is provided on the rectangular block, which is on the central axis of the valve stem.

The center of the valve rod, the center of the conical tip and the center of the valve rod are always kept on the same straight line through the coincidence of the conical tip and the center of the valve rod, so that the relative positions of the conical tip and the valve rod are always kept in balance, the balance of stress of the valve rod and the valve clack is guaranteed, and the problem of valve damage caused by overlarge local stress of the valve rod and the valve clack is solved.

Referring to fig. 3 and 4, in order to reduce the impact of water flow on the valve flap and the valve rod in the water inlet chamber, the water inlet chamber of the three-way valve is optionally provided with a guide cylinder, and the guide cylinder is provided with a guide hole 18. Optionally, the guide shell is provided with three support beams 22 to divide the guide shell into three guide windows, and each guide window is provided with one guide hole 18. Optionally, the flow guide holes are rectangular in structure. Optionally, the cross section of the support beam is an isosceles trapezoid structure.

The adoption has the isosceles trapezoid structure of two arc bottoms, can effectively eliminate the impact vibration of rivers to case, valve body to the direction is effectual, and the zhu bypass is closed tightly.

Referring to fig. 1-4, the water flow enters from the side with the smaller opening of the isosceles trapezoid structure and leaves from the side with the larger opening of the isosceles trapezoid structure, so that the water flow can be guided to flow towards the guide hole to enter the water inlet chamber, and the impact of the water flow on the water inlet chamber is avoided.

In order to improve the overall sealing effect of the three-way valve, optionally, the valve cover of the three-way valve body is in sealing connection with the valve body through a sealing structure, and the sealing structure comprises a four-open-ring gland, four open rings, a sealing ring pressing ring and a valve cover sealing ring; the four-open-ring gland, the four-open ring, the sealing ring pressing ring and the valve cover sealing ring are sequentially connected.

Referring to fig. 1, a manual switch device is connected to a bracket 2 of the three-way valve body, and is used for manually switching the three-way valve; the support 2 is also connected with an electric connecting rod 16, and the valve rod is driven to rotate through the electric connecting rod to provide power for the rotation of the valve rod. The bracket 2 is connected with the valve body through a screw; be equipped with valve gap 4 in support 2 and the valve body 10, four ring opening valve gap 14, four ring opening 3, sealing washer clamping ring 13 and sealing washer 12 are installed on valve gap 4 in proper order, and valve gap 4 passes through four ring opening valve gap 14, four ring opening 3, sealing washer clamping ring 13 and the common side of sealing washer 12 and valve body sealing connection.

The valve cover 4 is connected with the valve rod 1 through a copper sleeve 5.

A lower valve seat 8 is further arranged in the valve body, and a guide cylinder 9 is arranged at the position, close to the second water inlet chamber, of the lower valve seat 8.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The three-way valve comprises a three-way valve body and is characterized in that an upper valve seat of the three-way valve body is nested in a valve seat support ring, and a welding ring is arranged on the surface of the nested connection position of the upper valve seat and the valve seat support ring.

2. The three-way valve according to claim 1, wherein the valve stem of the three-way valve body is connected to an electrically powered connecting rod for externally connecting electrically powered equipment.

3. A three-way valve according to claim 2, characterized in that the valve stem is provided with a rectangular block, which is connected with the flap.

4. A three-way valve according to claim 3, characterized in that the rectangular block is provided with a conical tip, which is located on the centre line of the valve stem.

5. The three-way valve according to claim 1, characterized in that the inlet chamber of the three-way valve is provided with a guide cylinder, the guide cylinder is provided with a guide hole, and the guide hole is of a rectangular structure.

6. The three-way valve according to claim 1, characterized in that the valve cover of the three-way valve body is hermetically connected with the valve body through a sealing structure, and the sealing structure comprises a four-open-ring gland, four open rings, a sealing ring clamping ring and a valve cover sealing ring; the four-open-ring gland, the four-open ring, the sealing ring pressing ring and the valve cover sealing ring are sequentially connected.

7. A three-way valve according to claim 2, characterized in that the electrically operated device is provided with manual switching means.

8. The three-way valve according to claim 1, characterized in that the outer side of the valve seat support ring is provided with a first clamping block and a first clamping opening; a second clamping block and a second bayonet are arranged on the outer side of the upper valve seat; the first clamping block is used for being connected with the second bayonet in a clamping manner; the second clamping block is used for being connected with the first bayonet in a buckling mode; the first fixture block is a plurality of arc-shaped pieces arranged on the inner side wall of the valve seat support ring at intervals.