阅读说明：本技术 一种具有对称式结构的流量分配阀 (Flow distribution valve with symmetrical structure ) 是由 侯峰伟 吴斌 洪进元 章起华 曹德胜 张峻宾 陈磊 吕超 洪佳福 洪菊芬 于 2020-05-11 设计创作，主要内容包括：本发明公开了一种具有对称式结构的流量分配阀,包括阀体、阀盖和阀杆,其中,所述阀体包括对称设置的第一出口和第二出口,所述第一出口连通上阀腔,所述第二出口连通下阀腔,组装好阀内件的上阀腔与组装好阀内件的下阀腔结构对称,所述上阀腔与下阀腔的阀内件的中心形成连通的调节腔,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,所述阀芯固定在阀杆上。本发明实现流量的精准分配；上下阀腔内的阀内件均保持一致,实现阀内零部件互换要；阀芯上开有平衡孔,阀芯通过导向衬套进行导向,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 flow distribution valve with a symmetrical structure, which comprises a valve body, a valve cover and a valve rod, wherein the valve body comprises a first outlet and a second outlet which are symmetrically arranged, the first outlet is communicated with an upper valve cavity, the second outlet is communicated with a lower valve cavity, the upper valve cavity of an assembled valve trim is structurally symmetrical to the lower valve cavity of the assembled valve trim, a communicated adjusting cavity is formed by the centers of the valve trim of the upper valve cavity and the lower valve cavity, the valve rod is arranged at the center of the adjusting cavity, a valve core is arranged in the adjusting cavity for flow distribution, and the valve core is fixed on the valve rod. The invention realizes the accurate distribution of the flow; valve internals in the upper valve cavity and the lower valve cavity are consistent, so that the exchange of parts in the valve is realized; the valve core is provided with a balance hole and is guided by the guide bush, so that the operation driving force is reduced, and the valve is ensured to perform accurate and rapid flow regulation.)

1. A flow distribution valve with a symmetrical structure comprises a valve body, a valve cover and a valve rod, and is characterized in that the valve body comprises a first outlet and a second outlet which are symmetrically arranged, the first outlet is communicated with an upper valve cavity, the second outlet is communicated with a lower valve cavity, and the upper valve cavity of an assembled valve inner part is structurally symmetrical to the lower valve cavity of the assembled valve inner part; the valve inner part 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 arranged in an upper valve cavity from bottom to top, and the valve seat, the valve cage, the guide bushing and the pressure ring are sequentially arranged in a lower valve cavity from top to bottom; the valve comprises an upper valve cavity, a lower valve cavity, a valve rod, a valve core and a valve rod, wherein the upper valve cavity and the lower valve cavity are communicated through the centers of valve internals, the valve rod is arranged in the center of the adjusting cavity, the valve core is arranged in the adjusting cavity for flow distribution, and the valve core is fixed on the valve rod.

2. The flow distributing valve with a symmetrical structure as claimed in claim 1, wherein the cage is provided with a flow window, the spool comprises an upper spool and a lower spool, the upper spool is located in the upper valve chamber, and the upper spool controls the flow of the first outlet by controlling the opening size 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 second 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 distribute the flow of the first outlet and the flow of the second outlet.

3. The flow distributing valve with a symmetrical structure as claimed in claim 2, wherein the valve rod drives the valve core to move upwards, when the upper valve core abuts against the valve seat of the upper valve chamber, the upper valve core completely closes the flow window of the valve cage in the upper valve chamber, the first outlet is completely closed, the lower valve core completely opens the flow window of the valve cage in the lower valve chamber, the second outlet is completely opened, and the flow of the second outlet reaches the maximum; the valve rod drives the valve core to move downwards, when the lower valve core abuts against a valve seat of the lower valve cavity, the lower valve core completely closes a flow window of a valve cage in the lower valve cavity, the second outlet is completely closed, the upper valve core completely opens the flow window of the valve cage in the upper valve cavity, the first outlet is completely opened, and the flow of the first outlet reaches the maximum.

4. The flow distributing valve of claim 1, wherein a sealing groove is formed on a contact surface of the pressure 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 seals the balance hole.

5. The flow distributing valve with a symmetrical structure according to claim 1, wherein the valve body is provided with a valve seat hole matched with the valve seat, the valve seat is arranged at the valve seat hole, and a valve seat wound gasket is arranged at the contact part of the valve seat and the valve body.

6. The flow distributing valve of claim 1 wherein the valve seat has a valve seat boss that mates with a valve cage, the valve cage being disposed on the valve seat boss.

7. The flow distributing valve of claim 1 having a symmetrical configuration, wherein the cage is provided with a cage recess mating with a guide bushing disposed at the cage recess.

8. The flow distributing valve with a symmetrical structure according to claim 1, wherein the inside of the pressure ring is provided with a pressure ring recess matching with a guide bushing provided at the pressure ring recess.

9. The flow distribution valve with a symmetrical structure according to claim 1, wherein the contact surface of the valve core and the valve seat is a sealing 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; the contact surface of the valve core and the guide bush is a guide surface, and hard alloy is welded on the guide surface of the valve core in a surfacing mode.

10. The flow distribution valve of claim 1, wherein the spool is formed of austenitic stainless steel and the guide bushing is formed of 17-4PH precipitation hardened stainless steel.

Technical Field

The present invention relates to a flow distribution valve, and more particularly, to a flow distribution valve having a symmetrical structure.

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 invention aims to solve the technical problem of providing a flow distribution valve with a symmetrical structure, which adopts a symmetrical structural design to realize high-precision flow distribution, 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, and meets the requirement of realizing accurate control of total temperature of the wind tunnel under the working conditions of high pressure and large flow.

The invention provides a flow distribution valve with a symmetrical structure to solve the technical problems, which comprises a valve body, a valve cover and a valve rod, wherein the valve body comprises a first outlet and a second outlet which are symmetrically arranged, the first outlet is communicated with an upper valve cavity, the second outlet is communicated with a lower valve cavity, and the upper valve cavity of an assembled valve inner part is structurally symmetrical to the lower valve cavity of the assembled valve inner part; the valve inner part 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 arranged in an upper valve cavity from bottom to top, and the valve seat, the valve cage, the guide bushing and the pressure ring are sequentially arranged in a lower valve cavity from top to bottom; the valve comprises an upper valve cavity, a lower valve cavity, a valve rod, a valve core and a valve rod, wherein the upper valve cavity and the lower valve cavity are communicated through the centers of valve internals, the valve rod is arranged in the center of the adjusting cavity, the valve core is arranged in the adjusting cavity for flow distribution, and the valve core is fixed on the valve rod.

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 first 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 second 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 distribute the flow of the first outlet and the flow of the second outlet.

Further, the valve rod drives the valve core to move upwards, when the upper valve core abuts against a valve seat of the upper valve cavity, the upper valve core completely closes a flow window of a valve cage in the upper valve cavity, the first outlet is completely closed, the lower valve core completely opens the flow window of the valve cage in the lower valve cavity, the second outlet is completely opened, and the flow of the second outlet reaches the maximum; the valve rod drives the valve core to move downwards, when the lower valve core abuts against a valve seat of the lower valve cavity, the lower valve core completely closes a flow window of a valve cage in the lower valve cavity, the second outlet is completely closed, the upper valve core completely opens the flow window of the valve cage in the upper valve cavity, the first outlet is completely opened, and the flow of the first outlet reaches the maximum.

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 valve body is provided with a valve seat hole matched with the valve seat, the valve seat is arranged at the valve seat hole, and a valve seat wound gasket is arranged at the contact position of the valve seat and the valve body.

Furthermore, a valve seat boss matched with the valve cage is arranged on the valve seat, and the valve cage is arranged on the valve seat boss.

Furthermore, a valve cage concave platform matched with the guide bushing is arranged on the inner side of the valve cage, and the guide bushing is arranged at the position of the valve cage concave platform.

Further, the clamping ring inboard is equipped with the clamping ring concave station that matches with the direction bush, the direction bush sets up in clamping ring concave station department.

Furthermore, the contact surface of the valve core and the valve seat is a sealing 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; the contact surface of the valve core and the guide bush is a guide surface, and hard alloy is welded on the guide surface of the valve core in a surfacing mode.

Furthermore, the valve core is made of austenitic stainless steel, and the guide bushing is made of 17-4PH precipitation hardening stainless steel.

Compared with the prior art, the invention has the following beneficial effects: the flow distribution valve with the symmetrical structure 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 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; the valve adopts a linear sealing structure, a sealing surface is directly processed on the valve core and the valve seat, and the close matching of the valve core and the valve seat realizes the shutoff of one of the upper outlet and the lower outlet.

Drawings

FIG. 1 is a schematic view of a flow distributing valve having a symmetrical structure according to an embodiment of the present invention;

fig. 2 is an enlarged view of the upper valve cavity structure in the embodiment of the invention.

In the figure:

1. a valve body; 2. winding a gasket on the valve seat; 3. a valve seat; 4. a valve core; 5. a cage; 6. a guide bush; 7. balancing the sealing ring; 8. pressing a ring; 10. a valve stem; 12. a valve cover; 21. a first outlet; 22. a second 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 view of a flow distributing valve having a symmetrical structure according to an embodiment of the present invention.

Referring to fig. 1, the flow distribution valve with a symmetrical structure according to the embodiment of the present invention includes a valve body 1, a valve cover 12 and a valve rod 10, and is characterized in that the valve body 1 includes a first outlet 21 and a second outlet 22 which are symmetrically arranged, the first outlet 21 is communicated with an upper valve chamber 23, and the second outlet 22 is communicated with a lower valve chamber 24; the upper valve cavity 23 of the assembled valve trim is structurally symmetrical to the lower valve cavity 24 of the assembled valve trim, the valve trim comprises a valve seat 3, a valve cage 5, a guide bushing 6 and a pressing ring 8, the valve seat 3, the valve cage 4, the guide bushing 6 and the pressing ring 8 are sequentially arranged in the upper valve cavity 23 from bottom to top, and the valve seat 3, the valve cage 4, the guide bushing 6 and the pressing ring 8 are sequentially arranged in the lower valve cavity 24 from top to bottom; the upper valve cavity 23 and the center of the valve trim of the lower valve cavity 24 form a communicated adjusting cavity 25, the valve rod 10 is arranged in the center of the adjusting cavity 25, a valve core 4 is arranged in the adjusting cavity 25 for flow distribution, and the valve core 4 is fixed on the valve rod 10.

Specifically, in the flow distribution valve with a symmetrical structure of the embodiment of the invention, the valve cage 5 is provided with flow windows, and the valve cage 5 can adopt flow windows of different shapes, and even can adopt a multi-stage pressure reduction type labyrinth core bag; the valve core 4 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 first outlet 21 by controlling the opening size of a flow window of a valve cage in the upper valve cavity 23; the lower valve core is located in the lower valve cavity 24, the lower valve core controls the flow of the second outlet 22 by controlling the opening size of a flow window of a valve cage in the lower valve cavity 24, and the valve rod 10 drives the upper valve core and the lower valve core to move relative to the valve cage 5 to distribute the flow of the first outlet 21 and the flow of the second outlet 22.

Specifically, in the flow distribution valve with a symmetrical structure according to the embodiment of the present invention, the valve rod 10 drives the valve core 4 to move downward, when the upper valve core abuts against the valve seat 3 of the upper valve cavity 23, the upper valve core completely closes the flow window of the valve cage 5 in the upper valve cavity 23, the first outlet 21 is completely closed, the lower valve core completely opens the flow window of the valve cage 5 in the lower valve cavity 24, the second outlet 22 is completely opened, and the flow of the second outlet 22 reaches the maximum; the valve rod drives the valve core to move upwards, when the lower valve core abuts against the valve seat 3 of the lower valve cavity 24, the lower valve core completely closes the flow window of the valve cage 5 in the lower valve cavity 24, the second outlet 22 is completely closed, the upper valve core completely opens the flow window of the valve cage 5 in the upper valve cavity 23, the first outlet 22 is completely opened, and the flow of the first outlet 22 reaches the maximum.

Referring to fig. 2, in the flow distributing valve with a symmetrical structure according to the embodiment of the present invention, a sealing groove is disposed on a contact surface of the pressure ring 8 and the valve core 4, a balance sealing ring 7 is disposed in the sealing groove, a balance hole is disposed on the valve core 4, and the balance sealing ring 7 seals the balance hole. The valve body 1 is provided with a valve seat hole matched with the valve seat 3, the valve seat 3 is arranged at the valve seat hole, and the contact part of the valve seat 3 and the valve body 1 is provided with a valve seat wound gasket 2. And a valve seat boss matched with the valve cage 5 is arranged on the valve seat 3, and the valve cage 5 is arranged on the valve seat boss. The inner side of the valve cage 5 is provided with a valve cage concave table matched with the guide bush 6, and the guide bush 6 is arranged at the position of the valve cage concave table. The 8 inboards of clamping ring are equipped with the clamping ring concave station that matches with guide bush 6, guide bush 6 sets up in clamping ring concave station department.

Preferably, the contact surface of the valve core 4 and the valve seat 3 is a sealing surface, hard alloy is welded on the sealing surface of the valve core 4, and hard alloy is welded on the sealing surface of the valve seat 3, so that a linear sealing structure is realized, and the sealing effect is improved; the contact surface of the valve core 4 and the guide bush 6 is a guide surface, and hard alloy is welded on the guide surface of the valve core 4.

Preferably, the valve core 4 is made of austenitic stainless steel, the guide bushing 6 is made of 17-4PH precipitation hardening stainless steel, the guide bushing 6 is subjected to solid solution and aging heat treatment to increase the hardness, strength and wear resistance of the guide bushing, the valve core 4 and the guide bushing 6 are made of certain hardness difference, the material combination abrasion and friction coefficient between the valve core 4 and the guide bushing 6 are optimal, and phenomena of jamming, seizure and the like cannot occur.

When the flow distribution valve with the symmetrical structure is actually used, the assembly process is as follows: firstly, the valve seat 3 is arranged at the valve seat hole matched with the valve seat, and the bottom of the valve seat 3 is provided with the winding gasket 2 to prevent a medium from leaking from the position; secondly, assembling the valve cage 5, wherein the valve cage 5 is in clearance fit with the valve seat boss, and the orientation of the valve cage 5 needs to be noticed during assembly; next, assembling a guide bush 6, wherein the guide bush 6 is mainly used for guiding the valve core 4, and the guide bush 6 is arranged at a concave platform of the valve cage; next, assembling the pressing ring 8 and the balance sealing ring 7, wherein the orientation of the balance sealing ring 7 needs to be noticed during assembly, and the assembling direction determines the key whether the structure can be sealed; then, assembling the valve core 4 and the valve rod 10, enabling the valve rod 10 to penetrate through a central hole of the valve core 4, enabling the two round nuts to be tightly combined, and sleeving a check ring to fix the valve core 4; and finally, assembling the valve cover 12, and finishing the assembly of all parts.

According to the flow distribution valve with the symmetrical structure, the valve internal part structure adopts the stacking and quick-dismantling design and the modular design, the fit among all the valve internal parts is clearance fit, the clearance fit does not influence the performance of the valve, a special tool is not needed in the assembly process, and the assembly, disassembly and maintenance efficiency is improved.

In summary, in the flow distribution valve with the symmetrical structure 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; the valve core 4 is provided with a balance hole, the valve core 4 is guided by the guide bush 6, the 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 carry out accurate and rapid flow adjustment; the valve adopts a linear sealing structure, a sealing surface is directly processed on the valve core 4 and the valve seat 3, and one of the upper outlet and the lower outlet is closed through the close fit of the valve core 4 and the valve seat 3.

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.