TWM609344U - Mating plug-in connection valve - Google Patents

Abstract

The new model relates to a plug-in connection valve, which has a left-right symmetrical structure. As far as the left half is concerned, it includes a valve body, a locking sleeve, a valve stem and a floating sleeve. Wherein, a containing cavity is provided in the valve body, and is separated from the right half part by a barrier wall. A through hole is opened on the partition wall. The locking sleeve is sleeved and fixed in the accommodating cavity by means of a threaded pair. A through hole is opened along the axial direction of the locking sleeve, which is in clearance fit with the valve stem. The floating sleeve is built in the containing cavity, arranged on the inner side of the locking sleeve, and sleeved and fixed on the valve stem. A vent hole is opened along the axial direction of the valve stem, and a tapered matching section is provided at the end of the valve rod. The outer diameter of the floating sleeve is smaller than the inner diameter of the containing cavity. In this way, during the insertion process, the valve stem can float freely in the locking sleeve along its radial direction, and the self-directing characteristic of the tapered surface ensures the coaxiality with the through hole, thereby preventing assembly The stress phenomenon occurs to ensure that it has good pressure and sealing performance.

Description

A pair of plug-in connection valve

The model relates to the technical field of valve manufacturing, in particular to a plug-in connection valve.

Because of its simple structure, compactness, reliable sealing, convenient operation and maintenance, and wide application range, the plug-in connection valve is widely used in machinery, chemical, petroleum and other industries. The plug-in connection valve has a left-right symmetrical structure. In the prior art, it includes a valve body, a first locking sleeve, a second locking sleeve, a first valve stem, a second valve stem and other parts. The body is provided with a first accommodating cavity and a second accommodating cavity, which are respectively formed by extending inwardly of the left and right side walls, and are separated by a barrier wall. A through hole is opened on the partition wall to communicate the first accommodating cavity and the second accommodating cavity. The first locking sleeve and the second locking sleeve are respectively sleeved and fixed in the first accommodating cavity and the second accommodating cavity by means of a thread pair. A first through hole and a second through hole are opened along the axial direction of the first locking sleeve and the second locking sleeve, which are used for passing through the first valve stem and the second valve stem respectively, and are also connected by means of threaded pairs. . A first vent hole and a second vent hole are opened along the axial direction of the first valve rod and the second valve rod, and a first taper matching section and a second taper matching section are respectively provided at both ends. Along the left-to-right direction, the through hole is sequentially formed by a first tapered hole matching the first tapered matching section, a straight through hole, and a second tapered hole matching the second tapered matching section. When inserting, the first valve stem and the second valve stem are respectively dragged by the first locking sleeve and the second locking sleeve to realize the docking operation, that is, the first taper fitting section and the second taper fitting section. Insert and abut with the first tapered hole and the second tapered hole to form a complete gas circulation channel of the first vent hole-the through hole-the second vent hole (as shown in Figure 1 Shown in). By adopting the above technical solution to set up, the docking type connecting valve has excellent pressure resistance, and the sealing air pressure can reach 400Mpa. However, it is necessary to strictly control the first tapered fitting section, the first tapered hole and the second cone during the manufacturing process The centering accuracy of the tapered mating section and the second tapered hole causes difficulties in manufacturing and molding and assembly, resulting in extremely high processing costs, which is not conducive to market promotion. When the alignment accuracy cannot meet the manufacturing standards, although it can be forcibly corrected by the tapered guiding performance, assembly stress is formed, which degrades the stress state of each component to a certain extent, and reduces its limit to a certain extent. The sealing pressure value increases the wear rate of the sealing surface, thereby reducing its service life. Therefore, technical personnel are urgently required to solve the above-mentioned problems.

The technical problem to be solved by the present invention is to provide a plug-in connection valve with reliable sealing and self-correcting of the sealing surface during the assembly process to avoid assembly stress.

In order to solve the above technical problems, the present invention relates to a plug-in connection valve, which includes a valve body, a first locking sleeve, a second locking sleeve, a first valve stem, a second valve stem, a first floating sleeve, and The second floating set. Wherein, a first accommodating cavity and a second accommodating cavity are provided in the valve body, which are formed by extending inwardly of the left and right side walls of the valve body, and are separated by barrier walls. A through hole is opened on the partition wall to communicate the first accommodating cavity and the second accommodating cavity. The first locking sleeve and the second locking sleeve are respectively sleeved and fixed in the first accommodating cavity and the second accommodating cavity by means of a thread pair. A first through hole and a second through hole are opened along the axial direction of the first locking sleeve and the second locking sleeve for passing the first valve stem and the second valve stem respectively. The outer diameter value of the first valve stem is smaller than the inner diameter value of the first through hole. The outer diameter of the second valve stem is smaller than the inner diameter of the second through hole. The first floating sleeve is built in the first accommodating cavity, arranged on the inner side of the first locking sleeve, and sleeved and fixed on the first valve stem. The second floating sleeve is built in the second accommodating cavity, arranged on the inner side of the second locking sleeve, and sleeved and fixed on the second valve stem. A first vent hole and a second vent hole are opened along the axial direction of the first valve rod and the second valve rod, and a first taper matching section and a second taper matching section are respectively provided at both ends. Along the left-to-right direction, the through hole is composed of a first tapered hole matching the first tapered matching section, a straight through hole, and a second tapered hole matching the second tapered matching section. The outer diameter of the first floating sleeve is smaller than the inner diameter of the first accommodating cavity. The outer diameter of the second floating sleeve is smaller than the inner diameter of the second accommodating cavity.

As a further improvement of the technical solution of the present invention, the roughness Ra of the above-mentioned first tapered matching section, second tapered matching section, first tapered hole and second tapered hole is less than 0.5 μm.

Of course, as a modified design of the above technical solution, a wear-resistant coating can also be provided on the mating surfaces of the first tapered matching section, the second tapered matching section, the first tapered hole, and the second tapered hole. Layer, and its roughness Ra is less than 0.5μm.

As a further improvement of the technical solution of the present invention, the taper of the above-mentioned first taper fitting section and the second taper fitting section is controlled at 1:15 to 1:10.

As a further improvement of the technical solution of the present invention, a plurality of annular inlay grooves are evenly distributed around the peripheries of the first tapered matching section and the second tapered matching section for inlaying the thermally expanded metal ring.

As a further improvement of the technical solution of the present invention, a first leak detection hole and a second leak detection hole are provided on the valve body, which are respectively opened corresponding to the first accommodating cavity and the second accommodating cavity.

As a further improvement of the technical solution of the present invention, the first floating sleeve and the first valve stem and the second floating sleeve and the second valve stem are all connected by means of threaded pairs.

Of course, as a modified design of the above technical solution, the above-mentioned first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem can also be thermally fitted by means of interference fit.

Of course, as another modified design of the above-mentioned technical solution, the above-mentioned first float There is a clearance fit between the sleeve and the first valve stem and between the second floating sleeve and the second valve stem, and is fixed by means of an adhesive filling layer.

Compared with the traditional design structure of the plug-in connection valve, in the technical solution disclosed in the present invention, the first valve stem and the first locking sleeve and the second valve stem and the second locking sleeve are matched by thread The auxiliary connection is changed to a clearance fit, and correspondingly, a first floating sleeve and a second floating sleeve are added to support and lock it. In this way, during the process of inserting the first valve stem and the second valve stem, Among them, the two can respectively float freely along the radial direction of the first locking sleeve and the second locking sleeve, and realize their own accurate positioning with the help of the self-guided positive characteristics of the tapered surface to ensure that they are aligned with the first cone. The coaxiality of the shaped hole and the second tapered hole, and then the first valve stem and the second valve stem are reliably pressed by pushing the first floating sleeve and the second floating sleeve respectively, thereby effectively preventing assembly stress Phenomenon occurs, to ensure that it has a relatively good pressure and sealing performance.

1: Valve body

11: The first accommodating cavity

12: Second receiving cavity

13: The partition wall

131: Through hole

1311: The first tapered hole

1312: Through hole

1313: second tapered hole

14: The first leak detection hole

15: The second leak detection hole

2: The first locking sleeve

21: The first through hole

3: The second locking sleeve

31: second through hole

4: The first valve stem

41: The first vent

42: The first tapered mating section

5: The second stem

51: second vent

52: The second conical mating section

6: The first floating set

7: The second floating set

8: Thermal expansion metal ring

Fig. 1 is a schematic diagram of the structure of a center-to-plug connection valve in the prior art.

Fig. 2 is a front view of the first embodiment of the plug-in connection valve of the present invention.

Fig. 3 is a side view of the first embodiment of the plug-in connection valve in the present invention.

Fig. 4 is a cross-sectional view taken along the line A-A in Fig. 3.

Fig. 5 is a cross-sectional view of the valve body in the first embodiment of the plug-in connection valve of the present invention.

Fig. 6 is a partial enlarged view of I in Fig. 5.

Fig. 7 is a cross-sectional view of the first locking sleeve in the first embodiment of the plug-in connection valve of the present invention.

Fig. 8 is a cross-sectional view of the second locking sleeve in the first embodiment of the plug-in connection valve of the present invention.

Fig. 9 is a cross-sectional view of the first valve stem in the first embodiment of the plug-in connection valve of the present invention.

Fig. 10 is a cross-sectional view of the second valve stem in the first embodiment of the plug-in connection valve of the present invention.

Fig. 11 is a schematic structural diagram of a second embodiment of the plug-in connection valve in the present invention.

Fig. 12 is a schematic structural diagram of a third embodiment of the plug-in connection valve in the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe and simplify the description of the present invention, instead of indicating or implying that the pointed device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

The following describes the content of the present invention in further detail with reference to specific embodiments. Figures 2, 3, and 4 respectively show the front view, side view and AA of the first embodiment of the plug-in connection valve in the present invention. The cross-sectional view shows that it is mainly composed of the valve body 1, the first locking sleeve 2, the second locking sleeve 3, the first valve stem 4, the second valve stem 5, the first floating sleeve 6, and the second floating sleeve 7. Partial composition. Wherein, a first containing cavity 11 and a second containing cavity 12 are provided in the valve body 1, which are formed by extending inwardly of the left and right side walls of the valve body 1, and are separated by a barrier wall 13. A through hole 131 is opened on the barrier wall 13 to communicate the first containing cavity 11 and the second containing cavity 12 (as shown in FIG. 5 ). The first locking sleeve 2 and the second locking sleeve 3 are respectively sleeved and fixed in the first accommodating cavity 11 and the second accommodating cavity 12 by means of a thread pair, that is, in the first locking sleeve 2 and the second locking sleeve The outer side wall of 3 is provided with an external thread. Correspondingly, the inner side wall of the first accommodating cavity 11 and the second accommodating cavity 12 is provided with an internal thread that matches the external thread. A first through hole 21 and a second through hole 31 are opened along the axial direction of the first locking sleeve 2 and the second locking sleeve 3 for the first valve stem 4 and the second valve stem 5 to pass through (as shown in the figure) 7 and 8). The outer diameters of the first valve stem 4 and the second valve stem 5 need to be slightly smaller than the first through hole 21 and the second through hole respectively. The inner diameter of the hole 31 is used to form a clearance fit. Generally speaking, the unilateral clearance should be controlled below 1mm. The first floating sleeve 6 is built in the first accommodating cavity 11, is arranged inside the first locking sleeve 2, and is sleeved and fixed on the first valve stem 4. The second floating sleeve 7 is built in the second accommodating cavity 12, is arranged inside the second locking sleeve 3, and is sleeved and fixed on the second valve stem 5. A first vent 41 and a second vent 51 are opened along the axial direction of the first valve stem 4 and the second valve stem 5, and a first taper fitting section 42 and a second taper are respectively provided at both ends The mating section 52 (as shown in Figures 9, 10). Along the direction from left to right, the through hole 131 is sequentially formed by a first tapered hole 1311, a straight through hole 1312 that matches the first tapered mating section 42, and the second tapered mating section 52. An adapted second tapered hole 1313 is formed (as shown in Fig. 6). The outer diameter values of the first floating sleeve 6 and the second floating sleeve 7 need to be smaller than the inner diameter values of the first accommodating cavity 11 and the second accommodating cavity 12 respectively. In this way, during the process of inserting the first valve stem 4 and the second valve stem 5, they can respectively float freely along the radial direction of the first locking sleeve 2 and the second locking sleeve 3, with the help of The self-guided positive characteristic on the tapered surface (that is, the contact and mating surface of the first tapered mating section 42 and the first tapered hole 1311, and the second tapered mating section 52 and the second tapered hole 1313) achieves its own accuracy. Positioning to ensure the coaxiality with the first tapered hole 1311 and the second tapered hole 1313, and then push the first floating sleeve 6 and the second floating sleeve 7 to realize the first valve stem 4 and the second valve The reliable compression of the rod 5 and the partition wall 13 ensures the coaxiality of the first valve rod 4 and the second valve rod 5 with respect to the through hole 131 on the premise of avoiding assembly stress during the assembly process. Ensure that the plug-in connection valve has a relatively good pressure tightness.

In order to further improve the pressure and sealing performance of the plug-in connection valve itself, it is necessary to control the surface accuracy of the mating sealing surface, that is, the first taper fitting section 42, the second taper fitting section 52, and the first taper The roughness Ra of the hole 1311 and the second tapered hole 1313 is also less than 0.5 μm.

It is known that after a period of operation, the sealing surface of the plug-in connection valve is extremely susceptible to wear, resulting in the occurrence of seal failure. For this reason, the first conical fitting section 42, the second conical fitting section 52, The mating surfaces of the first tapered hole 1311 and the second tapered hole 1313 are provided with a wear-resistant coating (not shown in the figure), thereby effectively reducing the relative wear speed of the sealing surface and ensuring the use of the plug-in connection valve life. Of course, it is also necessary to control the surface roughness of the wear-resistant coating itself, which should generally be less than 0.5 μm.

After a lot of experimental data, when the taper of the first taper fitting section 42 and the second taper fitting section 52 is controlled at 1:15~1:10, it not only makes the plug-in connection valve have better pressure resistance and sealing performance , And is conducive to its own manufacturing and molding. The reason is that the taper of the mating section determines the size of the contact area of the sealing mating surface, and the contact area of the sealing mating surface determines to a certain extent the pressure-resistant and sealing performance of the plug-in connection valve.

In order to realize the reliable fixing of the first valve stem 4 and the first floating sleeve 6, the second valve stem 5 and the second floating sleeve 7, various methods can be adopted for implementation, and the following are recommended:

1) The first floating sleeve 6 and the first valve stem 4 and the second floating sleeve 7 and the second valve stem 5 are all connected by means of threaded pairs, that is, between the first valve stem 4 and the second valve stem 5 External threads are provided on the outer side walls of the, and correspondingly, the inner side walls of the first floating sleeve 6 and the second floating sleeve 7 are provided with internal threads that are compatible with the above-mentioned external threads (as shown in Figure 4).

2) The first floating sleeve 6 and the first valve stem 4 and the second floating sleeve 7 and the second valve stem 5 are thermally fitted (not shown in the figure) by means of interference fit.

3) There is a clearance fit between the first floating sleeve 5 and the first valve stem 4 and between the second floating sleeve 7 and the second valve stem 5, which are fixed by means of an adhesive filling layer (not shown in the figure).

It should be noted that the above construction methods have their own advantages and disadvantages, which can be based on actual conditions. The situation is selected.

Figure 11 shows a schematic structural view of the second embodiment of the plug-in connection valve of the present invention. Compared with the above-mentioned first method, the difference is that: a first leak detection hole 14 is provided on the valve body 1 And the second leak detection hole 15, wherein the first leak detection hole 14 is opened on the top wall of the first accommodating cavity 11, located inside the first locking sleeve 2, and communicating with the inner cavity of the first accommodating cavity 11 The second leak detection hole 15 is opened on the top wall of the second accommodating cavity 12, is located inside the second locking sleeve 3, and communicates with the inner cavity of the second accommodating cavity 12. In this way, it is convenient for the staff to monitor the operating status of the plug-in connection valve in real time and determine whether its sealing performance is reliable.

Figure 12 shows a schematic structural view of the third embodiment of the plug-in connection valve in the present invention. Compared with the above-mentioned second embodiment, the difference lies in: surrounding the first cone-shaped mating section 42 and the second cone-shaped fitting section 42 A plurality of annular inlay grooves are evenly distributed on the periphery of the mating section 52 for inlaying the thermally expandable metal ring 8. In this way, when high-temperature gas or high-temperature fluid is passed into the plug-in connection valve, the thermally expanding metal ring 8 itself undergoes a volume expansion phenomenon due to heating, thereby further improving the reliability of the sealing of the tapered mating surface.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but should conform to the widest scope consistent with the principles and novel features disclosed in this article.

1: Valve body

2: The first locking sleeve

3: The second locking sleeve

4: The first valve stem

5: The second stem

6: The first floating set

7: The second floating set

Claims (9)

A counter-plug connection valve, comprising a valve body, a first locking sleeve, a second locking sleeve, a first valve stem, a second valve stem, a first floating sleeve, and a second floating sleeve; the valve body is provided with The first accommodating cavity and the second accommodating cavity are formed by extending inwardly of their left and right side walls respectively, and are separated by a partition wall; the partition wall is provided with a through hole for communicating the The first accommodating cavity and the second accommodating cavity; the first locking sleeve and the second locking sleeve are respectively sleeved and fixed to the first accommodating cavity and the second accommodating cavity by means of a thread pair Inside; along the axial direction of the first locking sleeve and the second locking sleeve are provided with a first through hole and a second through hole for the first valve stem and the second valve stem respectively Through; the outer diameter value of the first valve stem is smaller than the inner diameter value of the first through hole; the outer diameter value of the second valve stem is smaller than the inner diameter value of the second through hole; the first The floating sleeve is built in the first accommodating cavity, is arranged on the inner side of the first locking sleeve, and is sleeved and fixed on the first valve stem; the second floating sleeve is built in the second The accommodating cavity is arranged on the inner side of the second locking sleeve, and is sleeved and fixed on the second valve stem; and a first valve stem is opened along the axial direction of the first valve stem and the second valve stem. A vent hole, a second vent hole, and a first taper fitting section and a second taper fitting section are respectively provided at the ends of the two; along the left to right direction, the through-holes are arranged by and The first tapered matching section is composed of a first tapered hole, a straight through hole, and a second tapered hole matching the second tapered matching section; the outer diameter of the first floating sleeve is smaller than the first An inner diameter value of the accommodating cavity; the outer diameter value of the second floating sleeve is smaller than the inner diameter value of the second accommodating cavity. The plug-in connection valve according to claim 1, wherein the roughness Ra of the first tapered matching section, the second tapered matching section, the first tapered hole and the second tapered hole Less than 0.5μm. The plug-in connection valve according to claim 1, on the mating surfaces of the first tapered mating section, the second tapered mating section, the first tapered hole, and the second tapered hole All are provided with a wear-resistant coating, and their roughness Ra is less than 0.5μm. As for the plug-in connection valve according to any one of Claims 2-3, the taper of the first taper fitting section and the second taper fitting section is controlled at 1:15 to 1:10. According to the counter-plug connection valve according to any one of claims 1-3, a plurality of annular inlay grooves are evenly distributed around the peripheries of the first tapered mating section and the second tapered mating section, and To inlay the thermal expansion metal ring. The plug-in connection valve according to any one of claims 1-3, wherein the valve body is provided with a first The leak detection hole and the second leak detection hole are respectively opened corresponding to the first accommodating cavity and the second accommodating cavity. The plug-in connection valve according to any one of claims 1-3, between the first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem All are connected by means of threaded pairs. The plug-in connection valve according to any one of claims 1-3, between the first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem All heat suits are matched by interference fit. The plug-in connection valve according to any one of claims 1-3, between the first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem All are clearance fits and are fixed with the aid of an adhesive filling layer.

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