CN217003112U

CN217003112U - Valve core of vacuum isolation stop valve

Info

Publication number: CN217003112U
Application number: CN202122660369.3U
Authority: CN
Inventors: 蒋武扬
Original assignee: Shanghai Guangvalve Valve Co ltd
Current assignee: Shanghai Guangvalve Valve Co ltd
Priority date: 2021-11-02
Filing date: 2021-11-02
Publication date: 2022-07-19
Anticipated expiration: 2031-11-02

Abstract

The utility model discloses a valve element of a vacuum isolation stop valve, which comprises a hand wheel, wherein the lower end surface of the hand wheel is fixedly connected with a driving screw, the side wall of the driving screw is sleeved with a driving pipe, the side wall of the driving pipe is fixedly connected with a stop disc, the side wall of the stop disc is provided with an installation groove, a sealing ring is sleeved in the installation groove, the side wall of the driving pipe is circumferentially provided with a plurality of clamping grooves, the lower end surface of the driving screw is fixedly connected with a connecting rod, a compression box is arranged below the connecting rod, the lower end surface of the compression box is fixedly connected with an air bag, and an inflation mechanism for inflating the air bag is arranged in the compression box. According to the utility model, through arranging the structures such as the air bag, the compression box and the lower pressure plate, the auxiliary sealing is provided for the joint of the valve core and the valve body by utilizing the inflation and expansion process of the air bag when the valve core is in a closed state, the pressure of liquid borne by the sealing ring of the valve core is shared, and the pressure loss of the sealing ring is reduced.

Description

Valve core of vacuum isolation stop valve

Technical Field

The utility model relates to the technical field of stop valves, in particular to a valve core of a vacuum isolation stop valve.

Background

The stop valve, also called stop valve, is the most widely used valve, and it is popular because the friction between the sealing surfaces is small in the opening and closing process, it is durable, the opening height is not large, it is easy to manufacture, it is convenient to maintain, it is not only suitable for middle and low pressure, but also suitable for high pressure. The closing principle of the stop valve is that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat by means of the pressure of the valve rod, and the medium is prevented from flowing.

When the stop valve is used, the stop valve depends on the inner valve core to intercept a connecting pipeline, so that the flow blocking process is realized, and when the valve core of the existing stop valve is used, the pressure of liquid on a flow-blocking end of the liquid is larger, and the sealing performance of the valve core is reduced due to the fact that a sealing ring on the valve core of the valve body is damaged due to long-time use, so that the stop valve is scrapped.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a valve core of a vacuum isolation stop valve.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a case of stop valve is kept apart in vacuum, includes the hand wheel, the lower terminal surface fixedly connected with drive screw of hand wheel, the cover is equipped with the drive tube on drive screw's the lateral wall, fixedly connected with ends the dish on the lateral wall of drive tube, the mounting groove has been seted up on ending the lateral wall of dish, the mounting groove endotheca is equipped with the sealing washer, a plurality of joint grooves have been seted up to circumference on the lateral wall of drive tube, drive screw's lower terminal surface fixedly connected with connecting rod, the below of connecting rod is equipped with the compression case, the lower terminal surface fixedly connected with gasbag of compression case, be equipped with in the compression case and be used for the gas filled mechanism of aerifing in the gasbag, the lower terminal surface of connecting rod is equipped with the actuating mechanism who is used for providing power for gas filled mechanism.

Preferably, the inflation mechanism comprises a compression plate which is slidably connected in the compression box, a sealing ring is sleeved on the side wall of the compression plate in the circumferential direction, a plurality of air outlets are formed in the lower end face of the compression box, and the air outlets are communicated with the air bag.

Preferably, actuating mechanism includes the holding down plate of fixed connection terminal surface under the connecting rod, the lower terminal surface fixedly connected with two transition rods that the symmetry set up of holding down plate, two the lower terminal surface of transition rod all runs through compression case and fixed connection holding down plate.

Preferably, two symmetrically arranged return springs are elastically connected between the lower end face of the lower pressing plate and the upper end face of the compression box, and the return springs are sleeved on the transition rod.

Preferably, the upper end face of the compression box is fixedly connected with two symmetrically arranged support plates which are slidably clamped with the connecting rod.

Preferably, the connecting rod and the lateral wall of backup pad have all been seted up the spacing groove, the limiting groove of holding down plate sliding connection in the backup pad.

Compared with the prior art, the utility model has the beneficial effects that:

1. through setting up structures such as gasbag, compression case and holding down plate, realize utilizing the inflation process of gasbag to provide supplementary sealed to case and valve body laminating department when the closed condition to the case, share the pressure of the liquid that the case sealing washer receives, reduce the pressure loss of sealing washer.

2. Through setting up connecting rod, spacing groove and backup pad, realize pushing down the spacing that the in-process moved down the holding down plate to the drive tube, prevent that the holding down plate from breaking away from the drive of connecting rod, and lead to the gasbag to normally fill the gassing.

Drawings

FIG. 1 is a schematic view of a three-dimensional valve core structure of a valve core of a vacuum isolation stop valve according to the present invention;

FIG. 2 is a schematic cross-sectional view of a driving pipe of a valve core of a vacuum isolation stop valve according to the present invention;

fig. 3 is an enlarged schematic view of a structure a in fig. 2 of a valve core of a vacuum isolation stop valve according to the present invention.

In the figure: 1 hand wheel, 2 drive screw rods, 3 drive tubes, 4 transition rods, 5 stop discs, 6 connecting rods, 7 compression boxes, 8 mounting grooves, 9 clamping grooves, 10 air bags, 11 compression plates, 12 limiting grooves, 13 supporting plates and 14 lower pressing plates.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a single embodiment.

Referring to fig. 1-3, a valve core of a vacuum isolation stop valve comprises a hand wheel 1, a driving screw 2 is fixedly connected to the lower end surface of the hand wheel 1, a driving tube 3 is sleeved on the side wall of the driving screw 2, a stop disc 5 is fixedly connected to the side wall of the driving tube 3, a mounting groove 8 is formed in the side wall of the stop disc 5, a sealing ring is sleeved in the mounting groove 8, a plurality of clamping grooves 9 are circumferentially formed in the side wall of the driving tube 3, a connecting rod 6 is fixedly connected to the lower end surface of the driving screw 2, two symmetrically arranged support plates 13 are fixedly connected to the upper end surface of a compression box 7, the support plates 13 are slidably clamped with the connecting rod 6, limiting grooves 12 are formed in the side walls of the connecting rod 6 and the support plates 13, a lower pressing plate 14 is slidably connected to the limiting grooves 12 in the support plates 13, and the lower pressing plate 14 is limited by the connecting rod 6, the limiting grooves 12 and the support plates 13, the lower pressure plate 14 is prevented from being separated from the driving of the connecting rod 6, so that the air bag 10 cannot be normally inflated and deflated;

the below of connecting rod 6 is equipped with compression case 7, the lower terminal surface fixedly connected with gasbag 10 of compression case 7, be equipped with in the compression case 7 and be used for the mechanism of aerifing in the gasbag 10, it includes sliding connection compression board 11 in compression case 7 to aerify the mechanism, circumference cover is equipped with the sealing ring on the lateral wall of compression board 11, a plurality of ventholes have been seted up to the lower terminal surface of compression case 7, venthole intercommunication gasbag 10, through setting up gasbag 10, compression case 7 and holding down plate 14 isotructures, the inflation process that realizes utilizing gasbag 10 when the closed condition to the case provides supplementary seal to case and valve body laminating department, share the pressure of the liquid that the case sealing washer receives, reduce the pressure loss of sealing washer.

Wherein the inside wall fixedly connected with spacing ring of driving tube 3, the spacing ring sets up in the below of compression case 7 for to compression case 7 move down the spacing of in-process lowest position department.

The lower terminal surface of connecting rod 6 is equipped with the actuating mechanism who is used for providing power for inflating the mechanism, actuating mechanism includes the holding down plate 14 of fixed connection terminal surface under connecting rod 6, the transition pole 4 that two symmetries of holding down plate 14's lower terminal surface fixedly connected with set up, elastic connection has the reset spring that two symmetries set up between the up end of holding down plate 14's lower terminal surface and compression case 7, the reset spring cover is established on transition pole 4, compression case 7 and fixed connection holding down plate 14 are all run through to the lower terminal surface of two transition poles 4.

When the utility model is used, as shown in fig. 1-3, in the closing process of the valve body, the hand wheel 1 is rotated to drive the drive screw 2 to rotate, in the process, the drive pipe 3 drives the stop disc 5 to move downwards, when the stop disc 5 reaches the blocking position, the stop disc 5 is fixed, at the moment, the drive pipe 3 is limited and cannot rotate, at the moment, the hand wheel 1 is continuously rotated to drive the drive screw 2 to rotate, in the process, the connecting rod 6 moves downwards to push the lower pressing plate 14 to apply downward pressure on the transition rod 4, so as to drive the compression box 7 to move downwards, when the compression box 7 reaches the position of the limit ring in the drive pipe 3, the compression box 7 cannot move downwards, the transition rod 4 pushes the compression plate 11 to move downwards in the compression box 7 to compress the air in the compression box 7, the air is extruded into the air bag 10, at the moment, the air bag 10 becomes large in size and is deformed through the clamping groove 9, and the bottom of the air bag is contacted with the inner bottom of the connecting pipeline, thereby realizing the function of auxiliary sealing, and simultaneously the pressure of the liquid cut-off can be buffered through the deformation of the air bag 10.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. A valve core of a vacuum isolation stop valve comprises a hand wheel (1) and is characterized in that a driving screw (2) is fixedly connected to the lower end face of the hand wheel (1), a driving pipe (3) is sleeved on the side wall of the driving screw (2), a stop disc (5) is fixedly connected to the side wall of the driving pipe (3), a mounting groove (8) is formed in the side wall of the stop disc (5), a sealing ring is sleeved in the mounting groove (8), a plurality of clamping grooves (9) are circumferentially formed in the side wall of the driving pipe (3), a connecting rod (6) is fixedly connected to the lower end face of the driving screw (2), a compression box (7) is arranged below the connecting rod (6), an air bag (10) is fixedly connected to the lower end face of the compression box (7), and an inflation mechanism for inflating the air bag (10) is arranged in the compression box (7), and a driving mechanism for providing power for the inflating mechanism is arranged on the lower end face of the connecting rod (6).

2. The valve core of the vacuum isolation stop valve according to claim 1, wherein the inflation mechanism comprises a compression plate (11) slidably connected in a compression box (7), a sealing ring is circumferentially sleeved on a side wall of the compression plate (11), a plurality of air outlet holes are formed in the lower end surface of the compression box (7), and the air outlet holes are communicated with the air bag (10).

3. The valve core of the vacuum isolating stop valve according to claim 2, characterized in that the driving mechanism comprises a lower pressing plate (14) fixedly connected to the lower end face of the connecting rod (6), the lower end face of the lower pressing plate (14) is fixedly connected with two symmetrically arranged transition rods (4), and the lower end faces of the two transition rods (4) both penetrate through the compression box (7) and are fixedly connected with the lower pressing plate (14).

4. The valve core of the vacuum isolation stop valve according to claim 3, wherein two symmetrically arranged return springs are elastically connected between the lower end surface of the lower pressure plate (14) and the upper end surface of the compression box (7), and the return springs are sleeved on the transition rod (4).

5. The valve core of the vacuum isolation stop valve according to claim 4, wherein two symmetrically arranged support plates (13) are fixedly connected to the upper end surface of the compression box (7), and the support plates (13) are slidably clamped with the connecting rod (6).

6. The valve core of the vacuum isolation stop valve according to claim 5, wherein the connecting rod (6) and the supporting plate (13) are provided with a limiting groove (12) on the side wall, and the lower pressing plate (14) is slidably connected in the limiting groove (12) on the supporting plate (13).