CN211083179U

CN211083179U - Opposite-insertion type connecting valve

Info

Publication number: CN211083179U
Application number: CN201921832463.9U
Authority: CN
Inventors: 郭庆; 凃士雄; 凃志兴
Original assignee: Jpe Yean Hern Co ltd
Current assignee: Jpe Yean Hern Co ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-07-24
Anticipated expiration: 2029-10-29
Also published as: TWM609344U

Abstract

The utility model relates to a to inserting formula connecting valve, it is bilateral symmetry formula structure, with regard to half on the left side, including valve body, locking cover, valve rod and the cover that floats. Wherein, be provided with in the valve body and hold the chamber, and separate with right half by separating the wall. The partition wall is provided with a through hole. The locking sleeve is sleeved and fixed in the accommodating cavity by means of the thread pair. The axial direction of the locking sleeve is provided with a through hole which is in clearance fit with the valve rod. The floating sleeve is internally provided with an accommodating cavity, is arranged on the inner side of the locking sleeve and is sleeved and fixed on the valve rod. An air vent is arranged along the axial direction of the valve rod, and a conical matching section is arranged at the end part of the valve rod. The outer diameter value of the floating sleeve is smaller than the inner diameter value of the accommodating cavity. In this way, during the insertion process, the valve rod can freely float in the radial direction of the locking sleeve, and the coaxiality of the valve rod and the through hole is ensured by the self-guide property of the conical surface, so that the assembly stress phenomenon is prevented, and the good pressure-resistant sealing performance of the valve rod is ensured.

Description

Opposite-insertion type connecting valve

Technical Field

The utility model belongs to the technical field of the valve manufacturing technique and specifically relates to a to inserting formula connecting valve.

Background

The plug-in type connecting valve has the advantages of simple and compact structure, reliable sealing, convenient operation and maintenance, wide application range and the like, and is widely applied to the industries of machinery, chemical industry, petroleum and the like. The plug-in type connecting valve is of a bilateral symmetry structure, and comprises a valve body, a first locking sleeve, a second locking sleeve, a first valve rod, a second valve rod and the like in the prior art, wherein a first accommodating cavity and a second accommodating cavity are arranged in the valve body, are formed by inwards extending left and right side walls of the first accommodating cavity and the second accommodating cavity, and are separated by a blocking wall. The partition wall is provided with a through hole for communicating 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 thread pairs. And a first through hole and a second through hole are formed along the axial direction of the first locking sleeve and the second locking sleeve, are used for the first valve rod and the second valve rod to pass through respectively, and are connected by means of a thread pair. First air vent, second air vent have been seted up along the axial of first valve rod, second valve rod, and are provided with first toper cooperation section, second toper cooperation section respectively at both tip. The through hole is sequentially formed by a first taper hole matched with the first taper matching section, a through hole and a second taper hole matched with the second taper matching section along the left-to-right direction. During insertion, the first valve rod and the second valve rod are respectively dragged by the first locking sleeve and the second locking sleeve to realize butt joint operation, namely the first conical matching section and the second conical matching section are inserted and attached with the first conical hole and the second conical hole to form a complete gas circulation channel of the first vent hole, the straight hole and the second vent hole (as shown in fig. 1). Through adopting above-mentioned technical scheme to set up, this dock connecting valve has good withstand voltage nature, and sealed atmospheric pressure can reach 400Mpa, however, need the first toper cooperation section of strict control and first bell mouth and second toper cooperation section and the centering precision in second toper hole in manufacturing process, lead to its manufacturing shaping and assembly difficulty to cause the processing cost high, be unfavorable for carrying out marketing. When the centering accuracy cannot meet the manufacturing standard, although forced guiding can be performed through the conical guiding performance, assembly stress is formed, the stress state of each component part is deteriorated to a certain extent, the limit sealing pressure value is reduced to a certain extent, the abrasion rate of the sealing surface is increased, and the service life of the sealing surface is shortened, so that a skilled person is urgently required to solve the problems.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a sealed reliable, and the sealed face can lead by oneself in the assembling process, avoid the assembling stress to the formula of inserting connecting valve that appears.

In order to solve the technical problem, the utility model relates to a to inserting formula connecting valve, it includes that valve body, first locking cover, second locking cover, first valve rod, second valve rod, first cover and the second that floats float and overlap. Wherein, be provided with first holding chamber, second in the valve body and hold the chamber, form by its left and right lateral wall is inside to extend respectively, and separate by separating the wall. The partition wall is provided with a through hole for communicating the first accommodating cavity with 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 thread pairs. And a first through hole and a second through hole are formed along the axial direction of the first locking sleeve and the second locking sleeve and are used for the first valve rod and the second valve rod to pass through respectively. The outer diameter value of the first valve rod is smaller than the inner diameter value of the first through hole. The outer diameter value of the second valve rod is smaller than the inner diameter value of the second through hole. The first floating sleeve is arranged in the first accommodating cavity, arranged on the inner side of the first locking sleeve and sleeved and fixed on the first valve rod. The second floating sleeve is arranged in the second accommodating cavity, arranged on the inner side of the second locking sleeve and sleeved and fixed on the second valve rod. First air vent, second air vent have been seted up along the axial of first valve rod, second valve rod, and are provided with first toper cooperation section, second toper cooperation section respectively at both tip. The through hole is composed of a first taper hole matched with the first taper matching section, a through hole and a second taper hole matched with the second taper matching section in sequence from left to right. The outer diameter value of the first floating sleeve is smaller than the inner diameter value of the first accommodating cavity. The outer diameter value of the second floating sleeve is smaller than the inner diameter value of the second accommodating cavity.

As the further improvement of the technical proposal of the utility model, the roughness Ra of the first conical matching section, the second conical matching section, the first conical hole and the second conical hole is less than 0.5 μm.

Of course, as a modified design of the above technical solution, the mating surfaces of the first taper fitting section, the second taper fitting section, the first taper hole and the second taper hole may be provided with wear-resistant coatings, and the roughness Ra thereof is less than 0.5 μm.

As a further improvement of the technical scheme of the utility model, the taper of the first taper fitting section and the second taper fitting section is controlled within the range of 1: 15-1: 10.

As the utility model discloses technical scheme's further improvement has many rings shape around the periphery equipartition of first toper cooperation section and second toper cooperation section and inlays the recess, is used for inlaying the thermal energy becket.

As the utility model discloses technical scheme's further improvement is provided with first leak hunting hole and second leak hunting hole on the valve body, just holds the chamber to set up corresponding to first chamber, the second of holding respectively.

As a further improvement of the technical solution of the present invention, the first floating sleeve and the first valve rod and the second floating sleeve and the second valve rod are coupled by means of a screw pair.

Of course, as a modified design of the above technical solution, the first floating sleeve and the first valve rod and the second floating sleeve and the second valve rod may also be shrink-fitted by interference fit.

Of course, as another modified design of the above technical solution, the first floating sleeve and the first valve rod and the second floating sleeve and the second valve rod are in clearance fit and fixed by means of an adhesive filling layer.

Compared with the butt-plug type connecting valve with the traditional design structure, in the technical scheme disclosed by the utility model, the matching form of the first valve rod and the first locking sleeve and the second valve rod and the second locking sleeve is changed into clearance fit by screw pair connection, and the first floating sleeve and the second floating sleeve which play the functions of propping against and locking are correspondingly added, thus, in the process of plugging the first valve rod and the second valve rod, the first valve rod and the second valve rod can respectively and freely float in the first locking sleeve and the second locking sleeve along the radial direction of the first locking sleeve and the second locking sleeve, the accurate positioning of the first valve rod and the second valve rod can be realized by virtue of the self-guide positive characteristic of the conical surface, the coaxiality of the first conical hole and the second conical hole is ensured, then the first valve rod and the second valve rod are reliably pressed by the mode of propping against the first floating sleeve and the second floating sleeve, thereby effectively preventing the assembly stress phenomenon from occurring, ensure that the sealing device has better pressure-resistant sealing performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a mid-plug type connection valve in the prior art.

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

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

Fig. 4 is a sectional view a-a of fig. 3.

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

Fig. 6 is an enlarged view of part I of fig. 5.

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

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

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

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

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

Fig. 12 is a schematic structural view of a third embodiment of the plug-in type connecting valve of the present invention.

1-a valve body; 11-a first containing cavity; 12-a second containing cavity; 13-a barrier wall; 131-through via; 1311-first tapered hole; 1312-a through hole; 1313-second tapered hole; 14-a first leak detection hole; 15-a second leak detection hole; 2-a first locking sleeve; 21-a first via; 3-a second locking sleeve; 31-a second via; 4-a first valve stem; 41-a first vent; 42-a first tapered mating section; 5-a second valve stem; 51-a second vent; 52-second tapered mating section; 6-a first floating sleeve; 7-a second floating sleeve; 8-thermally expanding metal ring.

Detailed Description

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The contents of the present invention will be further described in detail with reference to the following specific examples, and fig. 2, fig. 3 and fig. 4 respectively show a front view, a side view and a sectional view a-a of the first embodiment of the plug-in type connecting valve of the present invention, and it can be seen that the connecting valve mainly comprises a valve body 1, a first locking sleeve 2, a second locking sleeve 3, a first valve rod 4, a second valve rod 5, a first floating sleeve 6 and a second floating sleeve 7. The valve body 1 is provided with a first accommodating cavity 11 and a second accommodating cavity 12, which are formed by extending the left and right side walls inwards respectively, and are separated by a partition wall 13. A through hole 131 is formed in the partition wall 13 to communicate the first accommodating chamber 11 with the second accommodating chamber 12 (as shown in fig. 5). First locking cover 2, second locking cover 3 are established, are fixed in first chamber 11, the second holds the chamber 12 in with the help of the vice cover of screw thread respectively, have seted up the external screw thread promptly at the lateral wall of first locking cover 2 and second locking cover 3, correspondingly, set up the internal thread of this external screw thread looks adaptation on the first inside wall that holds chamber 11, second and hold chamber 12. A first through hole 21 and a second through hole 31 are formed along the axial direction of the first locking sleeve 2 and the second locking sleeve 3, and are used for the first valve rod 4 and the second valve rod 5 to pass through respectively (as shown in fig. 7 and 8). The outer diameters of the first valve rod 4 and the second valve rod 5 are required to be slightly smaller than the inner diameters of the first through hole 21 and the second through hole 31, respectively, so as to form clearance fit, and generally, the unilateral clearance is preferably controlled to be less than 1 mm. The first floating sleeve 6 is arranged in the first accommodating cavity 11, arranged on the inner side of the first locking sleeve 2, and sleeved and fixed on the first valve rod 4. The second floating sleeve 7 is arranged in the second accommodating cavity 12, arranged on the inner side of the second locking sleeve 3, and sleeved and fixed on the second valve rod 5. A first vent hole 41 and a second vent hole 51 are opened along the axial direction of the first valve rod 4 and the second valve rod 5, and a first tapered fitting section 42 and a second tapered fitting section 52 are respectively arranged at the ends of the first valve rod and the second valve rod (as shown in fig. 9 and 10). The through hole 131 is formed by a first tapered hole 1311 adapted to the first tapered fitting section 42, a through hole 1312, and a second tapered hole 1313 adapted to the second tapered fitting section 52 in this order from left to right (as shown in fig. 6). The outer diameter values of the first floating sleeve 6 and the second floating sleeve 7 are required 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 rod 4 and the second valve rod 5, the two can float freely in the first locking sleeve 2 and the second locking sleeve 3 along the radial direction thereof, and the self-alignment of the two is realized by the self-alignment property of the tapered surfaces (i.e. the contact mating surfaces 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), so as to ensure the coaxiality with the first tapered hole 1311 and the second tapered hole 1313, and then by pushing against the first floating bush 6 and the second floating bush 7 to achieve the reliable compression of the first valve rod 4 and the second valve rod 5 against the blocking wall 13, therefore, on the premise of avoiding the assembling stress phenomenon in the assembling process, the coaxiality of the first valve rod 4 and the second valve rod 5 relative to the through hole 131 is ensured, and the plug-in type connecting valve is further ensured to have better pressure-resistant sealing performance.

In order to further improve the pressure-tight sealing of the plug-in connection valve itself, it is necessary to control the surface accuracy of the mating sealing surfaces, i.e. the roughness Ra of the first tapered mating section 42, the second tapered mating section 52, the first tapered bore 1311 and the second tapered bore 1313 is also less than 0.5 μm.

It is known that, after a period of operation, the sealing surfaces in the plug-in connection valve are very easily worn, which results in the occurrence of sealing failure, and for this purpose, wear-resistant coatings (not shown in the figure) may be disposed on the mating surfaces of the first tapered mating section 42, the second tapered mating section 52, the first tapered hole 1311, and the second tapered hole 1313, so as to effectively reduce the relative wear rate of the sealing surfaces and ensure the service life of the plug-in connection valve. Of course, the surface roughness of the wear resistant coating itself also needs to be controlled, and is generally preferably less than 0.5 μm.

A large amount of experimental data prove that when the taper of the first tapered matching section 42 and the taper of the second tapered matching section 52 are controlled to be 1: 15-1: 10, the plug-in type connecting valve has good pressure-resistant sealing performance and is beneficial to manufacturing and molding. The reason for this is that the taper of the engagement section determines the size of the contact area of the sealing engagement surface, and the contact area of the sealing engagement surface to a certain extent determines the pressure-tight sealing of the plug-in connection valve.

In order to achieve a reliable fixation of the first valve rod 4 to the first floating sleeve 6 and the second valve rod 5 to the second floating sleeve 7, various implementations are possible, preferably as follows:

1) the first floating sleeve 6 and the first valve rod 4 and the second floating sleeve 7 and the second valve rod 5 are coupled by means of thread pairs, that is, external threads are formed on the outer side walls of the first valve rod 4 and the second valve rod 5, and correspondingly, internal threads (as shown in fig. 4) matched with the external threads are formed on the inner side walls of the first floating sleeve 6 and the second floating sleeve 7.

2) The first floating sleeve 6 and the first valve rod 4 and the second floating sleeve 7 and the second valve rod 5 are shrink-fitted by interference fit (not shown in the figure).

3) The first floating sleeve 5 and the first valve rod 4 and the second floating sleeve 7 and the second valve rod 5 are in clearance fit and are fixed by means of an adhesive filling layer (not shown in the figure).

The construction methods described above have advantages and disadvantages, and can be selected according to actual conditions.

Fig. 11 shows a schematic structural diagram of a second embodiment of the plug-in type connection valve of the present invention, which is different from the first embodiment in the following point: a first leakage detecting hole 14 and a second leakage detecting hole 15 are formed in the valve body 1, wherein the first leakage detecting hole 14 is formed in the top wall of the first accommodating cavity 11, is located on the inner side of the first locking sleeve 2, and is communicated 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 on the inner side of the second locking sleeve 3, and is communicated with the inner cavity of the second accommodating cavity 12. Therefore, the working personnel can monitor the running state of the plug-in connecting valve in real time and judge whether the sealing performance is reliable or not in time.

Fig. 12 shows a schematic structural diagram of a third embodiment of the plug-in type connecting valve of the present invention, which is different from the second embodiment in that: a plurality of annular insert grooves are uniformly distributed around the periphery of the first tapered fitting section 42 and the second tapered fitting section 52 for inserting the thermal expansion metal ring 8. Thus, when high-temperature gas or high-temperature fluid is introduced into the plug-in connection valve, the thermal expansion metal ring 8 is heated to generate volume expansion, so that the sealing reliability of the conical matching surface is further improved.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The opposite-insertion type connecting valve is characterized by comprising a valve body, a first locking sleeve, a second locking sleeve, a first valve rod, a second valve rod, a first floating sleeve and a second floating sleeve; a first accommodating cavity and a second accommodating cavity are arranged in the valve body, are formed by extending the left side wall and the right side wall inwards respectively, and are separated by a partition wall; a through hole is formed in the partition wall and used for communicating the first accommodating cavity with 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 thread pairs; a first through hole and a second through hole are formed along the axial direction of the first locking sleeve and the second locking sleeve and are used for the first valve rod and the second valve rod to pass through respectively; the outer diameter value of the first valve rod is smaller than the inner diameter value of the first through hole; the outer diameter value of the second valve rod is smaller than the inner diameter value of the second through hole; the first floating sleeve is arranged in the first accommodating cavity, arranged on the inner side of the first locking sleeve, sleeved and fixed on the first valve rod; the second floating sleeve is arranged in the second accommodating cavity, is arranged on the inner side of the second locking sleeve, and is sleeved and fixed on the second valve rod; a first vent hole and a second vent hole are formed in the axial direction of the first valve rod and the second valve rod, and a first conical matching section and a second conical matching section are respectively arranged at the end parts of the first vent hole and the second vent hole; the through hole is sequentially formed by a first conical hole matched with the first conical matching section, a through hole and a second conical hole matched with the second conical matching section from left to right; the outer diameter value of the first floating sleeve is smaller than the inner diameter value of the first accommodating cavity; the outer diameter value of the second floating sleeve is smaller than the inner diameter value of the second accommodating cavity.

2. The plug-in connection valve according to claim 1, characterized in that the first conical fitting section, the second conical fitting section, the first conical bore and the second conical bore have a roughness Ra of less than 0.5 μm.

3. The plug-in connection valve according to claim 1, characterized in that the mating surfaces of the first conical mating section, the second conical mating section, the first conical hole and the second conical hole are provided with a wear-resistant coating, and the roughness Ra of the coating is less than 0.5 μm.

4. The plug-in connection valve according to any one of claims 2 to 3, characterized in that the conicity of the first conical fitting section and the second conical fitting section is controlled to be 1:15 to 1: 10.

5. The valve according to any of claims 1 to 3, wherein a plurality of annular mounting grooves for mounting a heat expandable metal ring are uniformly distributed around the circumference of the first conical fitting section and the second conical fitting section.

6. A plug-in connection valve according to one of claims 1 to 3, characterized in that a first leakage opening and a second leakage opening are provided in the valve body, which openings correspond to the first receiving chamber and the second receiving chamber, respectively.

7. The plug-in connection valve according to one of claims 1 to 3, characterized in that the coupling between the first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem is by means of thread pairs.

8. The opposite-insertion type connecting valve according to any one of claims 1 to 3, wherein the first floating sleeve and the first valve stem and the second floating sleeve and the second valve stem are shrink-fitted by interference fit.

9. A plug-in connection valve according to one of claims 1 to 3, characterized in that the clearance fit between the first floating sleeve and the first valve stem and between the second floating sleeve and the second valve stem is provided, which is fixed by means of an adhesive filling layer.