CN220870095U - Evacuating valve - Google Patents

Abstract

The utility model relates to the technical field of vacuumizing, in particular to an evacuating valve, which comprises: the valve comprises a cylindrical valve body, a valve rod, a first connecting pipe, a second connecting pipe and a plug; one end of the first connecting pipe penetrates through the side wall of the valve body to be communicated with the inner cavity of the valve body, the other end of the first connecting pipe is connected with the vacuum pump, the first end of the second connecting pipe is in sealing connection with the bottom end of the valve body, the second end of the second connecting pipe is communicated with equipment to be vacuumized, the valve rod is inserted into the inner cavity of the valve body from the top end of the valve body and is in sealing connection with the top end of the valve body, the plug is connected to the bottom end of the valve rod, and the valve rod can move up and down along the inner cavity of the valve body to drive the plug to enter or move out of the second connecting pipe; the first end of the second connecting pipe is a taper pipe, the plug is in a truncated cone shape matched with the taper pipe, and when the valve rod drives the plug to enter the taper pipe, the plug is in sealing connection with the taper pipe. The evacuation valve provided by the utility model has good sealing performance and is not easy to leak.

Description

Evacuating valve

Technical Field

The utility model relates to the technical field of vacuumizing, in particular to an evacuating valve.

Background

The evacuation valve is an indispensable evacuation device for connecting the evacuation tube and the vacuum pump group. When the equipment needs to be vacuumized, a valve rod of the vacuumizing valve is pulled up, and the valve rod drives the plug to move upwards to the inner cavity of the valve body so as to vacuumize the equipment by using the vacuum pump set; after the vacuumizing is finished, the valve rod is pressed down, the valve rod drives the plug to move downwards into the vacuumizing pipe, and the plug is in sealing connection with the vacuumizing pipe so as to maintain the vacuum degree of the equipment.

In the related art, the tightness between the plug and the vacuumizing tube is poor, and the vacuum degree of the equipment is difficult to maintain.

Thus, there is a need for an evacuation valve that addresses the above-described issues.

Disclosure of utility model

The embodiment of the utility model provides an evacuation valve, which has good sealing performance and is not easy to leak.

An embodiment of the present utility model provides an evacuation valve including: the valve comprises a cylindrical valve body, a valve rod, a first connecting pipe, a second connecting pipe and a plug;

One end of the first connecting pipe penetrates through the side wall of the valve body to be communicated with the inner cavity of the valve body, the other end of the first connecting pipe is connected with the vacuum pump, the first end of the second connecting pipe is in sealing connection with the bottom end of the valve body, the second end of the second connecting pipe is communicated with equipment to be vacuumized, the valve rod is inserted into the inner cavity of the valve body from the top end of the valve body, the valve rod is in sealing connection with the top end of the valve body, the plug is connected to the bottom end of the valve rod, and the valve rod can move up and down along the inner cavity of the valve body to drive the plug to enter or move out of the second connecting pipe;

The first end of the second connecting pipe is a conical pipe, the plug is in a round table shape matched with the conical pipe, and when the valve rod drives the plug to enter the first end of the second connecting pipe, the plug is in sealing connection with the second connecting pipe.

In one possible design, both ends of the valve rod are provided with external threads, the middle section is a smooth cylinder without threads, and the large diameter of the external threads is smaller than the diameter of the middle section of the valve rod;

The plug is provided with an internal thread near the center of one end of the valve rod, the internal thread is matched with an external thread at the lower end of the valve rod, and the external thread of the valve rod can be screwed into or out of the internal thread of the plug by screwing the valve rod.

In one possible design, the outer diameter of the first end of the second adapter tube is equal to the inner diameter of the lower end of the valve body;

when the equipment to be vacuumized is vacuumized, the first end of the second connecting pipe is inserted into the lower end of the valve body, and the second connecting pipe is fixedly connected with the valve body through the first locking nut, the pressing plate and the first sealing O ring.

In one possible design, the device further comprises an L-shaped supporting component, wherein a first side of the supporting component is a supporting plate, and a second side of the supporting component is a double-ended stud; a boss is arranged on the outer wall of the top end of the valve body, a circular first through hole is formed in the boss, one end, away from the stud, of the supporting plate is fixedly connected with the top end of the valve rod, and the stud penetrates through the first through hole;

when the valve rod moves up and down along the inner cavity of the valve body, the support plate drives the stud to move up and down along the first through hole, the upper end of the stud is sleeved with a second locking nut and a hexagonal thin nut, the lower end of the stud is provided with a second locking nut, and the hexagonal thin nut and each second locking nut are screwed down to fix the stud at a specified height.

In one possible design, a circular second through hole is formed in one end, far away from the stud, of the support plate, the diameter of the second through hole is larger than that of the thread of the valve rod, and the diameter of the second through hole is smaller than that of the middle section of the valve rod, so that the support plate is sleeved at the upper end of the unthreaded part of the valve rod through the second through hole.

In one possible design, the valve further comprises a valve handle, wherein the lower end is provided with internal threads which are matched with external threads on the upper end of the valve rod so as to fix the valve handle on the top end of the valve rod.

In one possible design, a screw is also included, inserted at the junction of the valve stem and the valve stem.

In one possible design, at the junction of the valve rod and the top end of the valve body, a hexagonal nut, a sealing ring and a second sealing O-ring are sequentially sleeved on the outer wall of the valve rod, so as to ensure that the valve rod is in sealing connection with the top end of the valve body.

In one possible design, the end of the first connecting tube remote from the valve body is provided with a KF flange.

In one possible embodiment, the upper and lower ends of the connection between the plug and the second connecting tube are provided with a third sealing O-ring and a fourth sealing O-ring, respectively.

An embodiment of the present utility model provides an evacuation valve including: the valve comprises a cylindrical valve body, a valve rod, a first connecting pipe, a second connecting pipe and a plug. Through setting the first end of second takeover to the taper pipe, set up the end cap into the round platform shape, the junction of second takeover and end cap is the conical surface promptly, so, when the valve rod drove the end cap to get into the second takeover, the inner wall conical surface of end cap and second takeover is sealed, and sealing performance is better, is difficult for revealing.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of an evacuation valve provided in an embodiment of the present utility model in a closed state;

fig. 2 is a cross-sectional view of an evacuation valve provided in an embodiment of the present utility model in an open state;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a partial enlarged view at B in fig. 1.

Reference numerals:

1-a valve body; 2-a valve stem; 3-a first connection pipe; 4-a second connection pipe; 5-plugs; 6-a first lock nut; 7-pressing plates; 8-a first sealing O-ring; 9-supporting plates; 10-studs; 11-boss; 12-a second lock nut; 13-valve handle; 14-screws; 15-hexagonal nuts; 16-a sealing ring; 17-a second sealing O-ring; 18-a third sealing O-ring; 19-fourth sealing O-ring; 20-hexagonal thin nut.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present utility model are within the scope of protection of the present utility model.

As shown in fig. 1 and 2, an embodiment of the present utility model provides an evacuation valve including: a cylindrical valve body 1, a valve rod 2, a first connecting pipe 3, a second connecting pipe 4 and a plug 5;

One end of the first connecting pipe 3 passes through the side wall of the valve body 1 to be communicated with the inner cavity of the valve body 1, the other end of the first connecting pipe is connected with a vacuum pump, the first end of the second connecting pipe 4 is in sealing connection with the bottom end of the valve body 1, the second end of the second connecting pipe is communicated with equipment to be vacuumized, the valve rod 2 is inserted into the inner cavity of the valve body 1 from the top end of the valve body 1, the valve rod 2 is in sealing connection with the top end of the valve body 1, the plug 5 is connected to the bottom end of the valve rod 2, and the valve rod 2 can move up and down along the inner cavity of the valve body 1 so as to drive the plug 5 to enter or move out of the second connecting pipe 4;

the first end of the second connecting pipe 4 is a conical pipe, the plug 5 is in a truncated cone shape matched with the conical pipe, and when the valve rod 2 drives the plug 5 to enter the first end of the second connecting pipe 4, the plug 5 is in sealing connection with the second connecting pipe 4.

In this embodiment, through setting the first end of second takeover 4 to the taper pipe, set up end cap 5 to the round platform shape, the junction of second takeover 4 and end cap 5 is the conical surface promptly, so, when valve rod 2 drove end cap 5 to get into second takeover 4, the inner wall conical surface of end cap 5 and second takeover 4 is sealed, and sealing performance is better, is difficult for revealing.

In addition, the pressure bearing capacity of the evacuation valve can be improved through conical surface sealing. In addition, as shown in fig. 4, the upper end and the lower end of the connection part of the plug 5 and the second connecting pipe 4 are respectively provided with a third sealing O-ring 18 and a fourth sealing O-ring 19, so as to further improve the tightness between the plug 5 and the second connecting pipe 4.

In some embodiments, both ends of the valve rod 2 are provided with external threads, the middle section is a smooth cylinder without threads, and the external threads have a larger diameter than the middle section of the valve rod 2;

The plug 5 is provided with an internal thread near the center of one end of the valve rod 2, the internal thread is matched with an external thread at the lower end of the valve rod 2, and the external thread of the valve rod 2 can be screwed into or out of the internal thread of the plug 5 by screwing the valve rod 2.

As shown in fig. 2, when the evacuation valve is in an open state, the valve rod 2 is pulled up, the valve rod 2 is easy to fall under the action of negative pressure, and the valve rod 2 needs to be manually pulled or clamped by an iron wire or threaded in the valve cavity so as to prevent the falling of the valve rod 2 from influencing the evacuation.

To solve the above problem, the evacuation valve further comprises an L-shaped support assembly, wherein a first side of the support assembly is a support plate 9, and a second side of the support assembly is a stud 10; a boss 11 is arranged on the outer wall of the top end of the valve body 1, a circular first through hole is formed in the boss 11, one end, away from the stud 10, of the supporting plate 9 is fixedly connected with the top end of the valve rod 2, and the stud 10 penetrates through the first through hole;

When the valve rod 2 moves up and down along the inner cavity of the valve body 1, the supporting plate 9 drives the stud 10 to move up and down along the first through hole, the upper end of the stud 10 is sleeved with a second lock nut 12 and a hexagonal thin nut 20, the lower end of the stud 10 is provided with a second lock nut 12, and the stud 10 is fixed at a specified height by screwing the hexagonal thin nut 20 and each second lock nut 12.

In this embodiment, by providing an L-shaped support assembly, the stud 10 can move following the up-down movement of the support plate 9 when the hex thin nut 20 and each of the second lock nuts 12 are in a non-tightened state. When the valve stem 2 is in the position shown in fig. 3, the hexagonal thin nut 20 and each of the second lock nuts 12 are tightened, thereby preventing the stud 10 from loosening and falling off, thereby preventing the valve stem 2 from falling off, and performing the vacuuming operation smoothly.

In addition, a circular second through hole is formed in one end, far away from the stud 10, of the supporting plate 9, the diameter of the second through hole is larger than that of the thread of the valve rod 2, and the diameter of the second through hole is smaller than that of the middle section of the valve rod 2, so that the supporting plate 9 is sleeved at the upper end of the unthreaded part of the valve rod 2 through the second through hole. In this way, the support plate 9 can not damage the threads of the valve rod 2, but can be positioned at the unthreaded upper end of the valve rod 2, thereby facilitating the positioning of the stud 10.

In some embodiments, as shown in fig. 4, the outer diameter of the first end of the second adapter tube 4 is equal to the inner diameter of the lower end of the valve body 1;

When the equipment to be vacuumized is vacuumized, the first end of the second connecting pipe 4 is inserted into the lower end of the valve body 1, and the second connecting pipe 4 is fixedly connected with the valve body 1 through the first locking nut 6, the pressing plate 7 and the first sealing O-ring 8.

In this embodiment, the second adapter 4 can be connected more tightly to the valve body 1 by providing a nut, a pressing plate 7 and a sealing O-ring.

In addition, as shown in fig. 1, the evacuation valve further includes a valve handle 13 and a screw 14, the valve handle 13 is connected to the valve stem 2 by a screw thread, and is fixedly positioned with the hexagon socket head cap screw 14, thus facilitating the operation and preventing the valve stem 2 from being separated from the valve handle 13 when the valve handle 13 is screwed.

In some embodiments, as shown in fig. 3, at the connection position between the valve rod 2 and the top end of the valve body 1, a hexagonal nut 15, a sealing ring 16 and a second sealing O-ring 17 are sequentially sleeved on the outer wall of the valve rod 2, so as to ensure that the valve rod 2 and the top end of the valve body 1 are in sealing connection. Of course, the user may alternatively arrange a plurality of seal rings 16 and a plurality of second seal O-rings 17, and the number thereof is not particularly limited in the present application.

In addition, the first connecting pipe 3 is provided with KF flange in the one end that is kept away from valve body 1, is connected with the vacuum pump package through this flange, and the leakproofness is high.

In order to facilitate better understanding of the evacuation valve, the following describes the working principle of the evacuation valve with reference to the vacuum pipe shown in fig. 1 and 2 as a device to be evacuated:

Step 1, a vacuum pump set is connected with a KF flange of a first connecting pipe 3 in a sealing way, and a second end of a second connecting pipe 4 is welded with a vacuum pipeline in a sealing way;

Step 2, screwing the valve rod 2 of the evacuation valve into the internal thread of the plug 5, pulling the valve rod 2 to the uppermost end, and fully screwing nuts on the double-end stud 10 so as to keep the evacuation valve in an open state all the time when vacuumizing;

Step 3, when the vacuum pipeline meets the vacuum degree requirement, loosening a nut on the double-end stud 10, and pressing down the valve rod 2 to push the plug 5 into the second connecting pipe 4, and ensuring that the plug 5 is in sealing connection with the second connecting pipe 4;

step 4, separating the vacuum pump set from the KF flange of the first connecting pipe 3;

And 5, screwing the handle to separate the valve rod 2 from the plug 5, unscrewing the first locking nut 6 to separate the second connecting pipe 4 from the valve body 1, and arranging a dust cover at the opening end of the second connecting pipe 4.

It is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. An evacuation valve, comprising: a cylindrical valve body (1), a valve rod (2), a first connecting pipe (3), a second connecting pipe (4) and a plug (5);

One end of the first connecting pipe (3) penetrates through the side wall of the valve body (1) to be communicated with the inner cavity of the valve body (1), the other end of the first connecting pipe is connected with a vacuum pump, the first end of the second connecting pipe (4) is in sealing connection with the bottom end of the valve body (1), the second end of the second connecting pipe is communicated with equipment to be vacuumized, the valve rod (2) is inserted into the inner cavity of the valve body (1) from the top end of the valve body (1), the valve rod (2) is in sealing connection with the top end of the valve body (1), the plug (5) is connected to the bottom end of the valve rod (2), and the valve rod (2) can move up and down along the inner cavity of the valve body (1) to drive the plug (5) to enter or move out of the second connecting pipe (4);

the first end of the second connecting pipe (4) is a conical pipe, the plug (5) is in a round table shape matched with the conical pipe, and when the valve rod (2) drives the plug (5) to enter the first end of the second connecting pipe (4), the plug (5) is in sealing connection with the second connecting pipe (4).

2. An evacuation valve according to claim 1, wherein both ends of the valve stem (2) are provided with external threads, the middle section is a smooth cylinder without threads, and the external threads have a larger diameter than the middle section of the valve stem (2);

The plug (5) is provided with an internal thread near the center of one end of the valve rod (2), the internal thread is matched with an external thread at the lower end of the valve rod (2), and the external thread of the valve rod (2) can be screwed into or out of the internal thread of the plug (5) by screwing the valve rod (2).

3. An evacuation valve according to claim 1, wherein the outer diameter of the first end of the second nipple (4) is equal to the inner diameter of the lower end of the valve body (1);

When the equipment to be vacuumized is vacuumized, the first end of the second connecting pipe (4) is inserted into the lower end of the valve body (1), and the second connecting pipe (4) is fixedly connected with the valve body (1) through the first locking nut (6), the pressing plate (7) and the first sealing O ring (8).

4. The evacuation valve according to claim 2, further comprising an L-shaped support assembly, the first side of the support assembly being a support plate (9) and the second side being a stud (10); a boss (11) is arranged on the outer wall of the top end of the valve body (1), a circular first through hole is formed in the boss (11), one end, away from the stud (10), of the supporting plate (9) is fixedly connected with the top end of the valve rod (2), and the stud (10) penetrates through the first through hole;

When the valve rod (2) moves up and down along the inner cavity of the valve body (1), the double-end stud (10) is driven by the supporting plate (9) to move up and down along the first through hole, the upper end of the double-end stud (10) is sleeved with a second locking nut (12) and a hexagonal thin nut (20), the lower end of the double-end stud is provided with a second locking nut (12), and the double-end stud (10) is fixed at a designated height by screwing the hexagonal thin nut (20) and each second locking nut (12).

5. An evacuation valve according to claim 4, wherein a circular second through hole is provided in an end of the support plate (9) remote from the stud (10), the diameter of the second through hole being larger than the diameter of the thread of the valve stem (2) and smaller than the diameter of the middle section of the valve stem (2), so that the support plate (9) is sleeved on the upper end of the non-threaded part of the valve stem (2) through the second through hole.

6. An evacuation valve according to claim 2, further comprising a valve stem (13) provided at a lower end with an internal thread which cooperates with an external thread at an upper end of the valve stem (2) to secure the valve stem (13) at a top end of the valve stem (2).

7. An evacuation valve according to claim 6, further comprising a screw (14) inserted at the junction of the valve stem (13) and the valve stem (2).

8. The evacuation valve according to claim 1, wherein a hexagonal nut (15), a sealing ring (16) and a second sealing O-ring (17) are sequentially sleeved on the outer wall of the valve rod (2) at the joint of the valve rod (2) and the top end of the valve body (1) so as to ensure that the valve rod (2) and the top end of the valve body (1) are in sealing connection.

9. An evacuation valve according to claim 1, characterised in that the end of the first nipple (3) remote from the valve body (1) is provided with a KF flange.

10. The evacuation valve according to claim 1, wherein the upper and lower ends of the junction of the plug (5) and the second nipple (4) are provided with a third sealing O-ring (18) and a fourth sealing O-ring (19), respectively.