CN218267284U

CN218267284U - Stop valve with replaceable plug

Info

Publication number: CN218267284U
Application number: CN202222679896.3U
Authority: CN
Inventors: 岑佳鹏
Original assignee: Chengdu Yifan Plastic Co ltd
Current assignee: Chengdu Yifan Plastic Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-01-10
Anticipated expiration: 2032-10-12

Abstract

The utility model discloses a stop valve with a replaceable plug, which comprises a valve sleeve, an upper valve rod, a lower valve rod and a plug, wherein the lower end of the upper valve rod is connected with the upper end of the lower valve rod, the valve sleeve is sleeved on the upper valve rod and the lower valve rod, the lower end of the lower valve rod penetrates out of the valve sleeve, the lower end of the lower valve rod is provided with a second connecting groove, one end of the plug is provided with a connecting lug, and the plug and the lower valve rod are detachably connected through the connecting lug and the second connecting groove; and a copper corrugated pipe for sealing is also arranged between the lower valve rod and the valve sleeve. The utility model has the advantages of the leakproofness is good, and anti dark ability of leaking is strong, and the convenience can not influence original leakproofness after the end cap is changed and is changed.

Description

Stop valve with replaceable plug

Technical Field

The utility model relates to a valve technical field for the pipeline especially relates to a stop valve of removable end cap.

Background

The stop valve is through changing throttle cross section or throttle length with the valve of control fluid flow, and stop valve convenient to use, application range are very extensive, are common valve, and the closure principle of stop valve is: the valve clack sealing surface is tightly attached to the valve seat sealing surface by means of the pressure of the valve rod, and the medium is prevented from flowing.

The common valve body flow passage forms of the stop valve are 3 types of straight-through type, straight-through type and right-angle type, the fluid resistance of the straight-through type stop valve is large, and the valve body is called a spherical valve because the shape of the valve body is similar to a sphere; in order to reduce the fluid resistance, a direct-flow type, namely a Y-type stop valve and a right-angle type stop valve are arranged, and the direct-flow type is mainly used for fluid containing solid particles or high in viscosity; the right-angle type is used for high-pressure and medium-pressure right-angle type pipelines.

However, the plug of the existing stop valve, for example, patent No. CN202121320689.8 discloses a stop valve for a plastic pipeline, which is only sealed with the bottom of a water pipe by one end face, and can cause the phenomenon of hidden leakage after long-time use, resulting in waste of water resources, and the whole valve rod needs to be taken down for replacement when the plug is replaced, so that the replacement is inconvenient, and the sealing performance of the valve rod cannot be guaranteed after the valve rod is reinstalled.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stop valve of removable end cap, it is good to have the leakproofness, and anti dark ability of leaking is strong, and the end cap is changed conveniently and can not influence the advantage of original leakproofness after changing.

In order to realize the purpose, the utility model discloses a technical scheme is: a stop valve with a replaceable plug comprises a valve sleeve, an upper valve rod, a lower valve rod and a plug, wherein the lower end of the upper valve rod is connected with the upper end of the lower valve rod, the valve sleeve is sleeved on the upper valve rod and the lower valve rod, the lower end of the lower valve rod penetrates through the valve sleeve, a second connecting groove is formed in the lower end of the lower valve rod, a connecting convex block is arranged at one end of the plug, and the plug and the lower valve rod are detachably connected through the connecting convex block and the second connecting groove; and a copper corrugated pipe for sealing is also arranged between the lower valve rod and the valve sleeve.

Furthermore, the lower end of the lower valve rod is fixedly connected with a connecting ring, a connecting convex ring is arranged on the inner wall of the lower portion of the valve sleeve, one end of the copper corrugated pipe is connected with the end face of the connecting ring, and the other end of the copper corrugated pipe is connected with the end face of the connecting convex ring.

Furthermore, the outer wall of the lower end of the valve sleeve is provided with outer pipe threads for being in threaded connection with a connecting piece on the water pipe.

Furthermore, the upper end of the upper valve rod penetrates through the valve sleeve, and an O-shaped sealing ring is arranged between the inner wall of the upper end of the valve sleeve and the outer wall of the upper part of the upper valve rod.

Further, including disc, connecting lug, preforming, third spread groove, spliced pole and O type sealing washer, connecting lug sets up the up end of disc, the disc passes through connecting lug and is connected with lower valve rod, the lower extreme of disc 401 is equipped with the spliced pole, the concave ring that is used for the installation still is offered to the lower terminal surface of disc O type sealing washer, the lower terminal surface of spliced pole has been seted up the third spread groove, the preforming for round platform form and center go out set up with the through-hole of spliced pole 404 adaptation, insert when pressing the spliced pole after in the through-hole, the up end of preforming can push down O type sealing washer 5 to through fixing the preforming to the third spread groove.

Further, the end cap comprises a connecting disc and a sealing disc, the upper end of the connecting disc is provided with the connecting lug, and the lower end face of the connecting disc is connected with the sealing disc.

Compared with the prior art, the utility model has the advantages of: the water in the water pipe can be effectively prevented from leaking out of the upper valve rod through the sealing of the copper corrugated pipe 9, and the service life of the water stop valve is prolonged; when the stop valve works, the stop valve and the inner wall of the water pipe form linear sealing through the pressing sheet, and the O-shaped sealing ring on the end surface of the disc also plays a sealing role at the same time, so that a double-sealing effect is achieved; through double sealing, the probability of occurrence of the hidden leakage phenomenon of the valve and the water pipe (namely, water leaks from the inside of the water pipe but cannot be seen from the outside) can be effectively reduced, so that the waste of water resources is caused; when the plug is replaced, the valve rod does not need to be taken down, and the sealing performance of the valve rod is ensured.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of embodiment 2 of the present invention;

fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.

In the figure: 1. a valve housing; 2. an upper valve stem; 3. a lower valve stem; 301. a first connecting groove; 302. a second connecting groove; 4. a plug 401 and a disc; 402. tabletting; 403. a third connecting groove; 404. connecting columns; 405. a connecting disc; 406. sealing the disc; 5. an O-shaped sealing ring; 6. a connection bump; 7. a connecting ring; 8. a connecting convex ring; 9. a copper corrugated pipe; 10. fastening a nut; 11. a handle.

Detailed Description

The present invention will be further explained below.

Example 1: as shown in fig. 1, a stop valve with a replaceable plug comprises a valve sleeve 1, an upper valve rod 2, a lower valve rod 3 and a plug 4, wherein a first connecting groove 301 is formed in the upper end of the upper valve rod 3, an inner trapezoidal thread is arranged in the first connecting groove 301, an outer trapezoidal thread matched with the inner trapezoidal thread is arranged at the lower end of the upper valve rod 2, the upper valve rod 2 and the lower valve rod 3 are detachably connected in a trapezoidal thread connection mode, namely, the lower valve rod 3 can linearly move up and down through the rotation of the upper valve rod 2 and the transmission of the trapezoidal thread, a second connecting groove 302 is formed in the lower end of the lower valve rod 3, an internal thread is arranged in the second connecting groove 302, a connecting convex block 6 is arranged at one end of the plug 4, an external thread is arranged on the outer wall of the connecting convex block 6, and the plug 4 and the lower valve rod 3 are detachably connected in a threaded connection mode.

The valve sleeve 1 is sleeved on the outer walls of the upper valve rod 2 and the lower valve rod 3, the upper end of the upper valve rod 2 and the lower end of the lower valve rod 3 respectively penetrate through the upper end of the valve sleeve 1 and the lower end of the valve sleeve 1, the outer wall of the lower end of the valve sleeve 1 is provided with outer pipe threads for being in threaded connection with a connecting piece on a water pipe, an O-shaped sealing ring 5 is arranged between the inner wall of the upper end of the valve sleeve 1 and the outer wall of the upper portion of the upper valve rod 2, and the sealing performance is guaranteed through the O-shaped sealing ring 5.

Specifically, the lower extreme fixedly connected with go-between 7 of lower valve rod 3, be equipped with on the inner wall of the 1 lower part of valve barrel and connect bulge loop 8, the welding has the copper bellows 9 that is used for sealing between go-between 7 and the connection bulge loop 8, and the one end of copper bellows 9 is sealed with the terminal surface welding of go-between 7 promptly, and the other end of copper bellows 9 is sealed with the terminal surface welding of connecting bulge loop 8, can effectually avoid the water in the water pipe to leak the life that the axle sleeve improved the stagnant water valve through the sealing of copper bellows 9.

Specifically, the sealing surface of the plug 4 may be a truncated cone, a plane, a hemisphere, or a combination of a truncated cone and a plane.

Specifically, the upper end of the upper valve rod 2 is also connected with a handle 11 through a fastening nut 10.

Example 2: as shown in fig. 2, the plug 4 includes a disc 401, a connecting bump 6, a pressing plate 402, a third connecting groove 403, a connecting column 404 and an O-ring 5, the connecting bump 6 is vertically disposed on an upper end surface of the disc 401, the disc 6 is connected to the lower valve stem 3 through the connecting bump 6, the connecting column 404 is vertically disposed at a center of a lower end surface of the disc 401, a concave ring for mounting the O-ring 5 is further disposed on the lower end surface of the disc 401, the third connecting groove 403 is disposed on a lower end surface of the connecting column 404, the pressing plate 6 is circular-truncated-cone-shaped and has a through hole at a center thereof, the through hole is adapted to the connecting column 404, after the pressing connecting column 404 is inserted into the through hole, a part of the O-ring 5 can be pressed by the upper end surface of the pressing plate 6, and the pressing plate 6 is fixed by connecting a corresponding connecting member into the third connecting groove 403, preferably, the connecting member can adopt a riveting manner, and the specific riveting manner is that: inserting a plastic cylinder with the same diameter as the third connecting groove 403 into the third connecting groove 403, wherein the height of the plastic cylinder is greater than the depth of the third connecting groove 403, and then ironing the part of the plastic cylinder penetrating out of the third connecting groove 403 and enabling the part to cling to the pressing sheet 6, thereby fixing the pressing sheet 6; of course, the connecting member may also adopt a threaded connection manner, that is, the connecting member is a screw, a thread is provided in the third connecting groove 403, and the pressing sheet 6 is fixed by the screw; it should be noted that riveting is more cost effective than threading. The sealing effect of the plug 4 is further improved by combining the plane sealing of the O-shaped sealing ring 5 on the disc 401 with the frustum-shaped sealing of the pressing sheet 6.

Example 3: as shown in fig. 3, the plug 4 includes a connection disc 405 and a sealing disc 406, the upper end of the connection disc 405 is provided with the connection bump 6, the lower end face of the connection disc 405 is connected with the sealing disc 406, the sealing disc 406 is made of an ethylene propylene diene monomer material and is connected to the connection disc 405 through a hot-pressing fluidization process (i.e., one end face of the sealing disc 406 is heated and melted, and is tightly attached to the end face of the connection disc 405 after being cooled), and the sealing disc 406 is made of an ethylene propylene diene monomer material and has the advantages of being anti-aging and not easy to detach.

The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; while the invention has been described with reference to specific embodiments and applications, 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.

Claims

1. The utility model provides a stop valve of removable end cap, includes the valve barrel, goes up the valve rod, lower valve rod and end cap, the lower extreme of going up the valve rod with the upper end of lower valve rod is connected, the valve barrel cover is established go up on valve rod and the lower valve rod, and the valve barrel is worn out to the lower extreme of lower valve rod, its characterized in that: the lower end of the lower valve rod is provided with a second connecting groove, one end of the plug is provided with a connecting lug, and the plug and the lower valve rod are detachably connected through the connecting lug and the second connecting groove; and a copper corrugated pipe for sealing is also arranged between the lower valve rod and the valve sleeve.

2. The plug-replaceable shut-off valve of claim 1, wherein: the lower end of the lower valve rod is fixedly connected with a connecting ring, a connecting convex ring is arranged on the inner wall of the lower portion of the valve sleeve, one end of the copper corrugated pipe is connected with the end face of the connecting ring, and the other end of the copper corrugated pipe is connected with the end face of the connecting convex ring.

3. The plug-replaceable shut-off valve of claim 1, wherein: the outer wall of the lower end of the valve sleeve is provided with outer pipe threads for being in threaded connection with a connecting piece on the water pipe.

4. A removable plug stop valve as claimed in claim 3, wherein: the upper end of the upper valve rod penetrates out of the valve sleeve, and an O-shaped sealing ring is arranged between the inner wall of the upper end of the valve sleeve and the outer wall of the upper portion of the upper valve rod.

5. The plug-replaceable shut-off valve of claim 1, wherein: including disc, connecting lug, preforming, third spread groove, spliced pole and O type sealing washer, connecting lug sets up the up end of disc, disc pass through connecting lug and lower valve rod and are connected, the lower extreme of disc is equipped with the spliced pole, the concave ring that is used for the installation still has been offered to the lower terminal surface of disc O type sealing washer, the lower terminal surface of spliced pole has been seted up the third spread groove, the preforming for round platform form and center go out set up with the through-hole of spliced pole adaptation, insert when pressing the spliced pole back in the through-hole, the up end of preforming can push down O type sealing washer to through fixing the preforming to the third spread groove.

6. The plug replaceable shut-off valve of claim 1, wherein: the plug comprises a connecting disc and a sealing disc, the upper end of the connecting disc is provided with the connecting lug, and the lower end face of the connecting disc is connected with the sealing disc.