阅读说明：本技术 一种三通流量分配阀 (Three-way flow distribution valve ) 是由 侯峰伟 吴斌 洪进元 章起华 洪佳福 张峻宾 陈磊 吕超 于 2020-05-11 设计创作，主要内容包括：本发明公开了一种三通流量分配阀,包括下阀盖、阀体、上阀盖和阀杆,所述阀体包括入口、上出口和下出口,所述入口垂直于平行设置的上出口和下出口所在的平面,所述上出口和下出口呈中心对称设置且以入口的轴线为对称中心,所述上出口连通上阀腔,所述下出口连通下阀腔,组装好阀内件的上阀腔与组装好阀内件的下阀腔的呈对称设置；所述上阀腔与下阀腔的阀内件的中心与阀体形成连通的调节腔,所述阀杆设置在调节腔的中心,所述调节腔中设置有阀芯以进行流量分配。本发明实现流量的精准分配；阀芯上开有平衡孔,阀芯通过导向衬套进行导向,消除阀门在高压力调节过程中的不平衡载荷,减小操作驱动力,保证阀门进行准确快速流量调节。(The invention discloses a three-way flow distribution valve, which comprises a lower valve cover, a valve body, an upper valve cover and a valve rod, wherein the valve body comprises an inlet, an upper outlet and a lower outlet, the inlet is vertical to a plane where the upper outlet and the lower outlet which are arranged in parallel are located, the upper outlet and the lower outlet are arranged in a centrosymmetric manner and take the axis of the inlet as a symmetric center, the upper outlet is communicated with an upper valve cavity, the lower outlet is communicated with a lower valve cavity, and the upper valve cavity of an assembled valve internal part and the lower valve cavity of the assembled valve internal part are symmetrically arranged; the valve rod is arranged in the center of the adjusting cavity, and a valve core is arranged in the adjusting cavity to distribute flow. The invention realizes the accurate distribution of the flow; the valve core is provided with a balance hole and is guided by the guide bush, so that unbalanced load of the valve in the high-pressure adjusting process is eliminated, the operation driving force is reduced, and the valve is ensured to perform accurate and rapid flow adjustment.)

1. A three-way flow distribution valve is characterized by comprising a lower valve cover, a valve body, an upper valve cover and a valve rod, wherein the valve body comprises an inlet, an upper outlet and a lower outlet, the inlet is vertical to a plane where the upper outlet and the lower outlet which are arranged in parallel are located, the upper outlet and the lower outlet are arranged in a centrosymmetric manner and take the axis of the inlet as a symmetric center, the upper outlet is communicated with an upper valve cavity, the lower outlet is communicated with a lower valve cavity, and the upper valve cavity of an assembled valve internal part and the lower valve cavity of the assembled valve internal part are symmetrically arranged; the valve comprises an upper valve cavity, a lower valve cavity, a valve body, a valve rod, a valve core, a lower valve cover and an upper valve cover, wherein the centers of valve internals of the upper valve cavity and the lower valve cavity form an adjusting cavity communicated with the valve body, the valve rod is arranged at the center of the adjusting cavity, the adjusting cavity is internally provided with the valve core for flow distribution, the valve core is fixed on the valve rod, the lower valve cover is arranged at the bottom of the valve body and seals the bottom end of the adjusting cavity, and.

2. The three-way flow distributing valve of claim 1, wherein the valve trim comprises a valve seat, a valve cage, a guide bushing, and a pressure ring, the valve seat, the valve cage, the guide bushing, and the pressure ring are sequentially disposed in the upper valve chamber from bottom to top, and the valve seat, the valve cage, the guide bushing, and the pressure ring are sequentially disposed in the lower valve chamber from top to bottom.

3. The three-way flow distributing valve of claim 2 wherein the cage defines a flow window, the spool comprising an upper spool and a lower spool, the upper spool being positioned in the upper valve chamber, the upper spool controlling the flow of the upper outlet by controlling the size of the opening of the flow window of the cage in the upper valve chamber; the lower valve core is positioned in the lower valve cavity, the lower valve core controls the flow of the lower outlet by controlling the opening size of a flow window of a valve cage in the lower valve cavity, and the valve rod drives the upper valve core and the lower valve core to move relative to the valve cage to adjust the flow of the upper outlet and the lower outlet and open and close the upper outlet and the lower outlet.

4. The three-way flow distributing valve of claim 2 wherein said cage is a linear flow cage, said cage having a plurality of flow windows uniformly distributed along a cylindrical wall of said cage, said flow windows being Y-shaped through holes.

5. The three-way flow distributing valve according to claim 2, wherein a sealing groove is provided on a contact surface of the pressure ring and the valve element, a balance sealing ring is provided in the sealing groove, a balance hole is provided on the valve element, and the balance sealing ring seals the balance hole.

6. The three-way flow distributing valve according to claim 2, wherein the contact surface of the valve core and the valve seat is a sealing surface, the sealing surface is a conical surface, the sealing surface of the valve core is welded with hard alloy, and the sealing surface of the valve seat is welded with hard alloy.

7. The three-way flow distributing valve according to claim 2, wherein the valve stem passes through a through hole in the center of the valve core and is fixed at the end of the valve core by a round nut and a retaining ring.

8. The three-way flow distributing valve of claim 1, further comprising an actuator mounted by a bracket above the upper bonnet; the actuator is connected to the valve stem and controls movement of the valve stem.

9. The three-way flow distributing valve of claim 1, wherein the inlet, the upper outlet and the lower outlet of the valve body are provided with flanges, and the flanges are in threaded connection with the valve body.

10. The three-way flow distributing valve of claim 1, wherein the valve stem is made of 17-4PH forged stainless steel, and the valve core base is made of 410 stainless steel.

Technical Field

The invention relates to a flow distribution valve, in particular to a three-way flow distribution valve.

Background

When the hypersonic wind tunnel operates, in order to eliminate condensation and meet test requirements, a heat storage type heater is often adopted to heat airflow. The heat accumulating type heater can achieve the purpose of heating airflow with low power, and is economical to operate, so that the heat accumulating type heater is widely applied to the field of hypersonic wind tunnels. However, the heated airflow tends to have temperature climbs and instability, and the airflow temperature repeatability is poor for multiple times.

Aiming at the operation characteristics of the heat accumulating type heater, the temperature control of the wind tunnel airflow can be realized by adopting a cold and hot airflow mixing method, and the flow distribution valve can realize the function. The common structures of the flow distribution valve comprise a ball valve type, a regulating valve type and the like, the structures are more applied in industry, can be used for fluid reversing or flow control of systems such as air conditioners, water supplies, heating and the like, and have lower pressure (10 MPa) and lower regulating precision; however, for a wind tunnel test with short running time (second level) and high adjustment precision, the distribution valve structure cannot meet the use requirement.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a three-way flow distribution valve, which adopts a symmetrical structural design to realize high-precision flow distribution, and accurately mixes two hot and cold air flows on the premise of not influencing the total pressure control precision of a stable section of a wind tunnel, thereby meeting the requirement of accurate control of the total temperature of a test of the wind tunnel under the working conditions of high pressure and large flow.

The invention provides a three-way flow distribution valve which comprises a lower valve cover, a valve body, an upper valve cover and a valve rod, wherein the valve body comprises an inlet, an upper outlet and a lower outlet, the inlet is vertical to the plane where the upper outlet and the lower outlet which are arranged in parallel are located, the upper outlet and the lower outlet are arranged in a centrosymmetric manner and take the axis of the inlet as a symmetric center, the upper outlet is communicated with the upper valve cavity, the lower outlet is communicated with the lower valve cavity, and the upper valve cavity of an assembled valve inner part and the lower valve cavity of the assembled valve inner part are symmetrically arranged; the valve comprises an upper valve cavity, a lower valve cavity, a valve body, a valve rod, a valve core, a lower valve cover and an upper valve cover, wherein the centers of valve internals of the upper valve cavity and the lower valve cavity form an adjusting cavity communicated with the valve body, the valve rod is arranged at the center of the adjusting cavity, the adjusting cavity is internally provided with the valve core for flow distribution, the valve core is fixed on the valve rod, the lower valve cover is arranged at the bottom of the valve body and seals the bottom end of the adjusting cavity, and.

Further, valve internals includes disk seat, valve cage, guide bush and clamping ring, disk seat, valve cage, guide bush and clamping ring from the bottom up set gradually in last valve pocket, disk seat, valve cage, guide bush and clamping ring from the top down set gradually in the valve pocket under.

Furthermore, the valve cage is provided with a flow window, the valve core comprises an upper valve core and a lower valve core, the upper valve core is positioned in the upper valve cavity, and the upper valve core controls the flow of the upper outlet by controlling the opening size of the flow window of the valve cage in the upper valve cavity; the lower valve core is positioned in the lower valve cavity, the lower valve core controls the flow of the lower outlet by controlling the opening size of a flow window of a valve cage in the lower valve cavity, and the valve rod drives the upper valve core and the lower valve core to move relative to the valve cage to adjust the flow of the upper outlet and the lower outlet and open and close the upper outlet and the lower outlet.

Furthermore, the valve cage is a linear flow valve cage, a plurality of flow windows of the valve cage are uniformly distributed along the cylinder wall of the valve cage, and the flow windows are Y-shaped through holes.

Further, a sealing groove is formed in the contact surface of the pressing ring and the valve core, a balance sealing ring is arranged in the sealing groove, a balance hole is formed in the valve core, and the balance sealing ring is used for sealing the balance hole.

Further, the contact surface of the valve core and the valve seat is a sealing surface, the sealing surface is a conical surface, hard alloy is welded on the sealing surface of the valve core, and hard alloy is welded on the sealing surface of the valve seat.

Further, the valve rod penetrates through a through hole in the center of the valve core and is fixed at the end part of the valve core through a round nut and a check ring.

The device further comprises an actuator, wherein the actuator is arranged above the upper valve cover through a bracket; the actuator is connected to the valve stem and controls movement of the valve stem.

Further, the inlet, the upper outlet and the lower outlet of the valve body are provided with flanges, and the flanges are in threaded connection with the valve body.

Further, the valve rod is made of 17-4PH forged stainless steel, and the valve core base body is made of 410 stainless steel.

Compared with the prior art, the invention has the following beneficial effects: the three-way flow distribution valve provided by the invention obtains different flow area proportions of the two outlets under the condition of ensuring that the sum of the real-time flow areas of the two outlets of the flow distribution valve is not changed, and meets the flow distribution requirement of the valve; valve internals in the upper valve cavity and the lower valve cavity are kept consistent, so that the requirement of exchanging parts in the flow distribution valve is met; the valve core is provided with a balance hole, and the valve rod is guided by the upper and lower guide bushings, so that unbalanced load of the valve in the high-pressure adjusting process is eliminated, the operation driving force is reduced, and the valve is ensured to perform accurate and rapid flow adjustment; the valve adopts a conical surface line sealing structure, and the close fit of the upper valve core, the lower valve core and the upper valve seat realizes the shutoff of one of the upper outlet and the lower outlet.

Drawings

FIG. 1 is a schematic structural diagram of a three-way flow distributing valve according to an embodiment of the present invention;

FIG. 2 is a bottom view of a three-way flow distributing valve in an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a cage in an embodiment of the invention.

In the figure:

1. a lower valve cover; 4. a valve body; 5. pressing a ring; 6. a valve core; 7. balancing the sealing ring; 8. a guide bush; 9. a valve seat; 10. a cage; 11. a valve stem; 13. an upper valve cover; 16. a support; 17. an actuator; 20. an inlet; 21. an upper outlet; 22. a lower outlet; 23. an upper valve cavity; 24. a lower valve cavity; 25 the adjustment chamber.

Detailed Description

The invention is further described below with reference to the figures and examples.

FIG. 1 is a schematic structural diagram of a three-way flow distributing valve according to an embodiment of the present invention; FIG. 2 is a bottom view of a three-way flow distributing valve in an embodiment of the present invention.

Referring to fig. 1 and 2, the three-way flow distribution valve according to the embodiment of the present invention includes a lower bonnet 1, a valve body 4, an upper bonnet 13 and a valve stem 11, where the valve body 4 includes an inlet 20, an upper outlet 21 and a lower outlet 22, the inlet 20 is perpendicular to a plane where the upper outlet 21 and the lower outlet 22 are disposed in parallel, the upper outlet 21 and the lower outlet 22 are disposed in a central symmetry manner and are symmetric about an axis of the inlet 20, the upper outlet 21 is communicated with an upper valve chamber 23, the lower outlet 22 is communicated with a lower valve chamber 24, and the upper valve chamber 23 of the assembled valve trim and the lower valve chamber 25 of the assembled valve trim are disposed in a symmetric manner; the center of the valve trim of the upper valve cavity 23 and the lower valve cavity 25 is communicated with the valve body 4 to form an adjusting cavity 25, the valve rod 11 is arranged in the center of the adjusting cavity 25, the adjusting cavity 25 is internally provided with a valve core 6 for flow distribution, the valve core 6 is fixed on the valve rod 11, the lower valve cover 1 is arranged at the bottom of the valve body 4 and seals the bottom end of the adjusting cavity 25, and the upper valve cover 13 is arranged at the top of the valve body 4 and seals the top end of the adjusting cavity.

Specifically, the three-way flow distribution valve according to the embodiment of the invention comprises a valve seat 9, a valve cage 10, a guide bushing 8 and a pressure ring 7, wherein the valve seat 9, the valve cage 10, the guide bushing 8 and the pressure ring 7 are sequentially arranged in an upper valve cavity 23 from bottom to top, and the valve seat 9, the valve cage 10, the guide bushing 8 and the pressure ring 7 are sequentially arranged in a lower valve cavity 24 from top to bottom. The valve cage 10 is provided with a flow window, the valve core 6 comprises an upper valve core and a lower valve core, the upper valve core is positioned in the upper valve cavity 23, and the upper valve core controls the flow of the upper outlet 21 by controlling the opening size of the flow window of the valve cage 10 in the upper valve cavity 23; the lower valve core is positioned in the lower valve cavity 24, the lower valve core controls the flow of the lower outlet 22 by controlling the opening size of a flow window of the valve cage 10 in the lower valve cavity 24, and the valve rod 11 drives the upper valve core and the lower valve core to move relative to the valve cage 10 to regulate the flow of the upper outlet 21 and the lower outlet 22 and open and close the same. Under the condition of ensuring that the sum of the real-time flow areas of the two outlets is not changed, different flow area proportions of the two outlets are obtained, and the flow distribution requirement of the valve is met.

Specifically, the three-way flow distribution valve of the embodiment of the invention further comprises an actuator 17, wherein the actuator 17 is installed above the upper valve cover through a bracket 16; the actuator 17 is connected to the valve stem 11 and controls the movement of the valve stem 11. The inlet 20, the upper outlet 21 and the lower outlet 22 of the valve body 4 are provided with flanges which are in threaded connection with the valve body 4.

Referring to fig. 3, in the three-way flow distribution valve according to the embodiment of the present invention, the valve cage 10 is a linear flow valve cage, the number of flow windows of the valve cage is multiple, the multiple flow windows are uniformly distributed along the cylinder wall of the valve cage, and the flow windows are Y-shaped through holes. Flow regulation is carried out through a linear flow valve cage, so that the gas flow of two outlets is changed linearly, a high-precision quick-regulation actuator (the response time is superior to 0.5s, and the positioning precision is superior to 1 per thousand) drives a valve rod 11 to move up and down, the flow area of a valve cage 10 controls the outflow proportion of two air flows, and the air flow temperature of a wind tunnel is controlled in real time.

Specifically, in the three-way flow distributing valve of the embodiment of the invention, a sealing groove is arranged on the contact surface of the pressure ring 6 and the valve core 6, a balance sealing ring 7 is arranged in the sealing groove, a balance hole is arranged on the valve core 6, and the balance sealing ring 7 seals the balance hole; the unbalanced load of the valve in the high-pressure adjusting process is eliminated, the operation driving force is reduced, and the valve is guaranteed to perform accurate and rapid flow adjustment. The valve rod 11 passes through a through hole in the center of the valve core 6 and is fixed at the end part of the valve core 6 through a round nut and a check ring.

Preferably, in the three-way flow distribution valve according to the embodiment of the present invention, a contact surface between the valve element 6 and the valve seat 9 is a sealing surface, the sealing surface is a conical surface, hard alloy is welded on the sealing surface of the valve element 6, and hard alloy is welded on the sealing surface of the valve seat 9. One of the upper and lower outlets is closed by the close fit of the valve element 6 and the valve seat 9.

Preferably, the valve rod 11 is made of 17-4PH forged stainless steel, and has high strength and hardness, good plasticity and scouring resistance; the valve core 6 is made of 410 stainless steel, high in hardness and resistant to scouring; the strong scouring and abrasion of high-pressure airflow during the operation of the valve are resisted, so that the valve is durable.

In summary, in the three-way flow distribution valve according to the embodiment of the present invention, under the condition that the sum of the real-time flow areas of the two outlets of the flow distribution valve is not changed, different flow area ratios of the two outlets are obtained, so as to meet the flow distribution requirement of the valve; valve internals in the upper valve cavity and the lower valve cavity are kept consistent, so that the requirement of exchanging parts in the flow distribution valve is met; a balance hole is formed in the valve core 6, the valve core 6 is guided through the guide bushing 8, unbalanced load of the valve in the high-pressure adjusting process is eliminated, operation driving force is reduced, and accurate and rapid flow adjustment of the valve is guaranteed; the valve adopts a linear sealing structure, a sealing surface is directly processed on the valve core 6 and the valve seat 9, and one of the upper outlet and the lower outlet is closed through the close fit of the valve core 6 and the valve seat 9.

Although the present invention has been described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.