CN210600396U

CN210600396U - Stop valve limit structure

Info

Publication number: CN210600396U
Application number: CN201921324478.4U
Authority: CN
Inventors: 粟凯; 龚长龙; 顾朝党; 尹春雨; 黄菲
Original assignee: SHANGHAI VALVE FACTORY CO Ltd
Current assignee: SHANGHAI VALVE FACTORY CO Ltd
Priority date: 2019-08-15
Filing date: 2019-08-15
Publication date: 2020-05-22
Anticipated expiration: 2029-08-15

Abstract

The utility model discloses a stop valve limit structure has adopted the limiting plate of run-to-run structure, with the limiting plate joint in the limiting plate mounting groove department of valve rod to connect fixedly through the fastener, one side of limiting plate is equipped with the draw-in groove, makes the valve rod support joint in the draw-in groove, and the limit switch subassembly passes through the fixed plate and sets up in one side of valve rod support, opens the valve switch and the switch is located the below or the top at limiting plate both ends respectively. The utility model discloses a stop valve limit structure has solved small-bore stop valve and has been difficult to the problem of installing limit switch because of the limited problem that is difficult to install in support space, has solved its limiting plate of rotary rod stop valve and has rotated the problem difficult to trigger limit switch along with the valve rod, and the limiting plate of having solved the stop valve is difficult to the problem that online dismouting was overhauld.

Description

Stop valve limit structure

Technical Field

The utility model relates to a stop valve limit structure for valve field.

Background

Conventional shut-off valves typically restrict the open position of the valve by mechanical contact of the valve stem with the valve bonnet, and the closed position of the valve by mechanical contact of the valve body with the valve flap. Take limit switch's conventional stop valve, fix the limiting plate on spacing splint usually to it triggers limit switch, and this kind of structural constraint is great, requires that the valve rod only be elevating movement, to rotatory lift rod-type stop valve, because the limiting plate is rotatory along with the valve rod, will be difficult to trigger limit switch, and limiting plate and valve rod formula structure as an organic whole can't realize online dismouting and maintenance simultaneously. The existing stop valve limiting structure is difficult to apply to a small-caliber stop valve due to the reasons of overlarge size, limited support space and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art, provide a stop valve limit structure to realize the limit switch's of stop valve installation and trigger.

One technical scheme for achieving the above purpose is as follows: a stop valve limiting structure is arranged on a valve, the valve comprises a valve rod and a valve rod support, and the stop valve limiting structure comprises a limiting plate arranged on the valve rod and a limiting switch assembly arranged on the valve rod support;

the limiting plate is of a split structure and is formed by splicing two oppositely arranged limiting plate sub-plates, a valve rod through hole is formed in the middle of the limiting plate, a semicircular hole is formed in each limiting plate sub-plate through the valve rod through hole, a limiting plate mounting groove is formed in the valve rod, and the limiting plate sub-plates are spliced on two sides of the limiting plate mounting groove through the valve rod through holes; a clamping groove is formed in the middle of the long edge of one side of the limiting plate, and the valve rod support is clamped in the clamping groove; the two limiting plate sub-plates are mutually connected and fixed through fasteners;

the limit switch assembly is connected with the valve rod support through a fixing plate and comprises a valve opening switch and a valve closing switch which are arranged on two sides of the limit switch assembly respectively, and the valve opening switch and the valve closing switch are located below or above two ends of the limit plate respectively.

Furthermore, the limiting plate is provided with a bolt through hole, and the bolt through hole is opposite to a bolt on a packing gland of the valve.

Furthermore, both ends of the limiting plate are respectively provided with an upward connecting boss and a downward connecting boss, the connecting boss is provided with a connecting through hole which penetrates through the two limiting plate sub-plates, and the fastener penetrates through the connecting through hole to connect and fix the two limiting plate sub-plates.

Furthermore, the open valve switch and the close valve switch of the limit switch assembly are respectively arranged on two sides of the valve rod bracket through one fixing plate;

the contact of the switch valve switch is positioned below one end of the limit plate, and the connecting boss of the limit plate at the end is arranged upwards; and the contact of the valve opening switch is positioned above the other end of the limiting plate, and the connecting boss of the limiting plate at the end is arranged downwards.

Drawings

Fig. 1 is a schematic structural view of a stop valve limiting structure of the present invention;

FIG. 2 is a half sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

fig. 4 is a top view of a limiting plate 23 of a stop valve limiting structure according to the present invention;

fig. 5 is an enlarged view of the valve rod 3 and the limiting plate mounting groove 31 of the stop valve limiting structure of the present invention;

fig. 6 is a side view of a limiting plate 23 of a stop valve limiting structure according to the present invention;

fig. 7 is the utility model discloses a stop valve limit structure's limit switch subassembly's schematic structure diagram.

Detailed Description

Referring to fig. 1 to 7, in order to better understand the technical solution of the present invention, the following is described in detail by specific embodiments:

referring to fig. 1, the stop valve limiting structure of the present invention is disposed on a valve. The valve comprises a handwheel 15, a valve stem 3, a valve stem support 4 and a valve stem nut 14. The stop valve limit structure comprises a limit plate 23 (shown in figure 3) arranged on the valve rod and a limit switch assembly arranged on the valve rod bracket. The limit switch assembly includes a fixed plate 13, and an open valve switch and a close valve switch, both collectively referred to as limit switch 12.

Please refer to fig. 2 to 6. The limiting plate 23 is of a split structure and is formed by splicing two oppositely arranged limiting plate separating plates, a valve rod through hole is formed in the middle of the limiting plate 23, and the valve rod through hole forms a semicircular hole in each limiting plate separating plate. Be equipped with limiting plate mounting groove 31 on the valve rod 3, the limiting plate divides the board to splice in limiting plate mounting groove 31 both sides through the valve rod through-hole for limiting plate 23 follows valve rod 3 and carries out the up-and-down motion. Draw-in groove 41 has been seted up at the middle part on the long limit of limiting plate 23 one side, and valve rod support 4 joint is in draw-in groove 41 to the rotation of restriction limiting plate 23, when making when the rotation type valve rod rotate, limiting plate 23 keeps the motion of upper and lower direction not to follow the valve rod and rotates. The both ends of limiting plate 23 are equipped with an ascending connection boss 231 and a decurrent connection boss 231 respectively, offer the connect through-hole 232 that passes two limiting plate branches board on the connection boss 231, and fastener 30 (bolt, nut and packing ring) passes connect through-hole 232 and divides the board to connect two limiting plates fixedly, makes limiting plate 23 and valve rod 3 within a definite time be connected closely simultaneously, and this structure can make limiting plate 23 remain stable when triggering the limit switch subassembly. The stopper plate 23 is also called a Z-shaped stopper plate because its side surface is Z-shaped. The limiting plate 23 is further provided with a bolt through hole 201, and the bolt through hole 201 is opposite to the bolt 20 on the packing gland 9 of the valve, so that the bolt 20 is avoided when the limiting plate 23 is lifted.

Referring to fig. 7, the limit switch assembly includes an open valve switch and a close valve switch, both of which are collectively referred to as the limit switch 12. Two fixed plates 13 are arranged at two sides of the valve rod support 4 through bolts 11, limit switches 12 are respectively fixed on the side surfaces of the fixed plates 13, and switch contacts of the limit switches are perpendicular to the limit plates 23. The contact of the switch is positioned below one end of the limit plate 23, and the connecting boss 231 of the limit plate 23 at the end is arranged upwards; the contact of the valve-opening switch is located above the other end of the stopper plate 23, and the connection boss 231 of the stopper plate 23 at that end is disposed downward.

Carry out the utility model discloses a during stop valve limit structure's installation, at first with the limiting plate 23 joint on the limiting plate mounting groove 31 of valve rod 3 to it is fixed through fastener 30. And fixing plates 13 are fixed to both sides of the stem support 4 by bolts 11. Finally, the limit switch 12 is fixed to the fixing plate 13 by the bolt 26. The above completes the installation of the fitting.

The valve drives the valve rod 3 to rotate and lift through the hand wheel 15 and the valve rod nut 14, so as to drive the valve clack to lift. The limiting plate 23 is driven by the valve rod 3, and only does lifting movement due to the structural limitation of the clamping groove 41 and the valve rod support 4, so that the limiting switches 12 on the two sides are respectively triggered in the lifting process.

The utility model discloses a stop valve limit structure's online dismantlement process as follows: and loosening and detaching the fasteners 30, withdrawing the limiting plates 23 from the limiting plate mounting grooves 31 from the two sides of the valve rod 3 respectively, and taking the limiting plates 23 off the valve after inclining. Because the limiting plate 23 is a split structure, the valve does not need to be disassembled, and the operations such as disassembly, assembly, maintenance and the like can be completed on site.

It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims

1. The utility model provides a stop valve limit structure, sets up on the valve, the valve includes valve rod and valve rod support, and stop valve limit structure is including setting up the limiting plate on the valve rod and setting up the limit switch subassembly on valve rod support, its characterized in that:

2. The stop valve limit structure according to claim 1, wherein the limit plate is provided with a bolt through hole, and the bolt through hole is opposite to a bolt on a packing gland of the valve.

3. The stop valve limit structure of claim 1, wherein an upward connecting boss and a downward connecting boss are respectively arranged at two ends of the limit plate, the connecting boss is provided with a connecting through hole penetrating through the two limit plate sub-plates, and a fastener penetrates through the connecting through hole to connect and fix the two limit plate sub-plates.

4. A stop valve limit structure according to claim 1 or 3, wherein the open switch and the open/close switch of the limit switch assembly are respectively disposed on both sides of the valve stem support through one of the fixing plates;