CN204437330U - connecting rod gate valve - Google Patents

Abstract

The utility model provides a connecting rod gate valve, comprising: at least one power cylinder, a valve body with a valve port, a gate assembly arranged in the valve body, and at least one pressing rod, wherein the gate assembly has two adjacent main gates and an airtight gate, and the ends of the main gate and the airtight gate are connected by at least one parallel connecting rod; furthermore, one end of the pressing rod is pivotally connected to the airtight gate, and the other end extends to form a pressing end, and a connecting rod is pivotally connected at the middle section of the pressing rod, and the other end of the connecting rod is pivotally connected to the end of the main gate. Thus, the gate assembly can be driven by the power cylinder to close the valve port, and with the help of the connecting rod action of the pressing rod and other rods, the airtight gate is kept away from the main gate, and a sealing force is generated at the same time, so that the airtight gate and the valve port remain airtight.

Description

Connecting rod gate valve

technical field

The utility model relates to a sealing structure of a valve, in particular to a vacuum valve which is driven by a connecting rod so that an airtight gate and a valve port can be reliably sealed.

Background technique

A vacuum gate valve as shown in Figures 1a, 1b and 1c of Taiwan Patent No. I316997. The vacuum gate valve uses a control element (such as hydraulic pressure and rotation unit, etc.) to enable the valve stem to move along two degrees of freedom, so that the valve plate can move linearly along the axis of the valve stem (parallel to the direction of the valve port) to cover the At the valve port, it can be displaced in a direction perpendicular to the valve port. In this way, when the valve plate is displaced to the valve port, the valve plate can generate an additional force of sealing against the valve port, so as to ensure the airtight effect between the valve plate and the valve port.

However, most of this prior art requires a displacement trajectory control mechanism such as a slide rail at the hydraulic cylinder. For vacuum gate valves of different styles or sizes, it is necessary to calculate the conditions such as the size and position of the valve plate and valve port separately. When the valve plate is moved to the valve port, cover it tightly at the valve port at the same time, otherwise the defect that the valve plate cannot be tightly sealed will still occur, such as the valve plate is not covered parallel to the valve port, resulting in insufficient air density. In addition, after long-term use, the control components are also prone to wear and precision errors, and most of the control components are located deep inside the vacuum gate valve, which is inconvenient to disassemble and maintain.

Utility model content

In order to solve the shortcomings and inconveniences of the above-mentioned prior art, the utility model proposes a scheme of a connecting rod gate valve. The connecting rod gate valve of this scheme can be axially displaced in the gate group to align with the valve port After the position, the airtight gate of the gate group is further displaced in the direction perpendicular to the valve port by the action of the connecting rod, so that the airtight gate is indeed tightly closed at the valve port.

In order to solve the above problems, the utility model provides a connecting rod gate valve, comprising:

at least one power cylinder having an axially movable drive shaft;

A hollow valve body, one end of which is an open end, the open end is provided with a top cover, and the other end is provided with a power cylinder seat for installation of the power cylinder, and a shaft hole is formed through the power cylinder seat, The shaft hole allows the drive shaft to penetrate into the valve body; wherein, at least one valve port is provided on the side of the valve body close to the open end;

A gate group located in the valve body has a main gate and an airtight gate that are adjacent to each other, and the main gate is connected to the end of the drive shaft; wherein, the main gate and the The ends of the airtight gate are connected by at least one parallel connecting rod;

At least one pressing rod, one end of which is pivotally connected to the end of the airtight gate, and the other end extends toward the top cover to form a pressing end, wherein the middle section of the pressing rod is pivotally connected to a A linkage rod, the other end of which is pivotally connected to the end of the main flashboard.

The main purpose of this utility model is: the gate group can be driven by the drive shaft to generate axial displacement, when the gate group is displaced to the position aligned with the valve port, the pressure end of the pressure rod is subjected to stop pressure With the help of the connecting rod action of the pressing rod, connecting rod and parallel connecting rod, the airtight gate is driven away from the main gate and close to the valve port, so that the airtight gate can be tightly closed on the at the valve port.

The secondary purpose of the utility model is: the utility model has the advantages of simple, convenient and rapid maintenance. During maintenance, only the top cover needs to be opened, and the bolts used for fixing the gate group and the drive shaft can be removed to remove the whole group. The gate group can be taken out for maintenance or replacement, which can greatly reduce the time of machine downtime for maintenance.

Another secondary purpose of the present utility model is that: the valve body is provided with at least one stopper at the open end, and the stopper is aligned with the pressing end of the pressing rod, when the gate group is displaced to When the position is aligned with the valve port, the pressing end is in conflict with the stopper to drive the airtight ram to move, and the stopper bears the reaction force of the pressing rod to strengthen the overall structural strength, and the stopper It has the advantage of easy maintenance and replacement.

Another secondary purpose of the present utility model is: the main gate plate is provided with at least one slot, and the inner shaft of the slot is provided with a rolling bearing, and at least a part of the rolling bearing protrudes from the main gate plate adjacent to the airtight gate. The surface on the side of the plate, moreover, the airtight gate plate is also recessed with a propping groove for the rolling bearing to be accommodated. When the airtight ram moves, the rolling bearings cooperate with the abutment groove to disperse the reaction force on the airtight ram, prevent the airtight ram from bending and deformation, and increase product reliability and service life.

Description of drawings

Fig. 1 is a three-dimensional appearance combination diagram of the utility model.

Fig. 2 is an exploded view (1) of a partial three-dimensional appearance of the utility model.

Fig. 3 is an exploded view (2) of a partial three-dimensional appearance of the utility model.

Fig. 4 is a schematic diagram of the assembly action of the stopper of the present invention.

Fig. 5 is a schematic cross-sectional view of the opening of the valve port of the utility model.

Fig. 6 is a cross-sectional action schematic diagram (1) of closing the valve port of the present invention.

Fig. 7 is a cross-sectional action schematic diagram (2) of closing the valve port of the present invention.

Fig. 8 is a cross-sectional action schematic diagram (1) of the rolling bearing of the present invention.

Fig. 9 is a cross-sectional action schematic diagram (2) of the rolling bearing of the present invention.

【Symbol Description】

power cylinder 10

drive shaft 11

Body 20

open end 21

Top cover 22

Power cylinder seat 23

shaft hole 24

Port 25

Open port 26

Ram group 30

Main ram 31

Bolt 311

Airtight gate 32

parallel link 33

Slotted 34

Rolling bearing 35

axis 351

Resist groove 36

first paragraph 361

Second paragraph 362

spring element 37

Pressure rod 40

Pressure end 41

linkage rod 42

Pivot point A

stopper 50

Arc hole 51

Fastening end 52

Positioning groove 53.

Detailed ways

In order to illustrate the central idea of the utility model in the column of the above-mentioned utility model content, it is expressed in specific embodiments. Various objects in the embodiments are drawn according to proportions, sizes, deformations or displacements suitable for illustration, rather than drawn according to the proportions of actual components, which are described first. And in the following description, similar components are denoted by the same numerals.

As shown in Figures 1 to 4, a connecting rod gate valve of the present invention comprises:

At least one power cylinder 10 has an axially movable drive shaft 11 .

A hollow valve body 20, one end is an open end 21, the open end is provided with a top cover 22, and the other end is provided with a power cylinder seat 23 for the installation of the power cylinder 10, and on the power cylinder seat 23 A shaft hole 24 is penetrated through, and the shaft hole 24 can allow the drive shaft 11 to penetrate into the valve body 20; wherein, at least one valve port 25 is provided on the side of the valve body 20 close to the open end 21, and the valve The body 20 is provided with an opening 26 on the side opposite to the valve opening 25 .

A gate group 30 located in the valve body 20 has two adjacent main gates 31 and an airtight gate 32, the main gate 31 is locked and connected to the drive shaft by a bolt 311 11; wherein, the main gate 31 and the end of the airtight gate 32 are connected by at least one parallel connecting rod 33. In a preferred embodiment, the main gate 31 and the airtight gate The two ends of 32 are respectively connected with two parallel connecting rods 33, and a four-bar linkage is formed between the main flashboard 31, the two parallel connecting rods 33 and the airtight flashboard 32. In a more preferred embodiment, The four-bar linkage mechanism is a parallelogram linkage mechanism.

The main flashboard 31 is provided with at least one slot 34 at a position between the two ends, and a rolling bearing 35 is pierced by a shaft 351 in the slot 34, and at least a part of the rolling bearing 35 protrudes from the main flashboard 31. The surface adjacent to the side of the airtight gate plate 32, moreover, the airtight gate plate 32 is also recessed with a propping groove 36 for accommodating the rolling bearing 35, and the propping groove 36 has a first section 361 And a second section 362, the depth of the first section 361 is greater than the second section 362 (as shown in Figure 3 and Figure 8), and the second section 361 is located at the end of the abutting groove 36 close to the open end 21 .

At least one pressing rod 40, one end of which is pivotally connected to the end of the airtight gate 32, and the other end extends toward the top cover 22 to form a pressing end 41, and the pressing end 41 is A bearing 411 is provided. Wherein, the middle section of the pressing rod 40 is pivotally connected with a linkage rod 42 , and the other end of the linkage rod 42 is pivotally connected with the end of the main gate 31 . Furthermore, as shown in FIG. 3 , the linkage rod 42 extends from the pivotal end of the main shutter 31 to the side opposite to the airtight shutter 32 , and the pressing rod 40 is generally in the shape of an L-shaped rod. In a preferred embodiment, a pressing rod 40 is provided at both ends of the gate assembly 30 .

Furthermore, the valve body 20 is provided with at least one stopper 50 at the open end 21 . The valve body 20 is provided with two symmetrical arc holes 51 corresponding to the stopper 50 on two inner walls of the open end 21 , and two ends of the stopper 50 are arc-shaped ends. Wherein, the length of the stopper 50 is greater than the opening width of the open end 21, whereby, as shown in FIG. Rotate the stopper 50 in a direction so that both ends of the stopper 50 are screwed into the arc holes 51 . Furthermore, as shown in FIG. 2 , the stopper 50 is provided with a locking end 52 protruding relative to the side of the top cover 22 , and the inner side of the top cover 22 is concavely provided with a positioning groove 53 for accommodating the locking end 52 . , whereby, when the top cover 22 is locked at the open end 21 (as shown in FIG. 5 ), the positioning groove 53 can fix the position of the stopper 50 and prevent the stopper 50 from slipping out of the arc hole 51 .

Wherein, at least one spring member 37 is further provided between the main gate plate 31 and the airtight gate plate 32. As shown in FIG. Airtight flashboard 32, so that the elastic force that makes main flashboard 31 and airtight flashboard 32 close to normal. In a preferred embodiment, the gate assembly 30 is centered on the drive shaft 11 , with a rolling bearing 35 and a resisting groove 36 on both sides, and two spring members 37 are provided on each shaft 351 .

After understanding the detailed structure of the above-mentioned utility model, the following is a detailed description of the action principle of the utility model one by one:

As shown in Figure 5, when the valve port 25 is opened, the gate group 30 is located at the end of the valve body 20 away from the open end 21, and the airtight gate 32 is located close to the main gate 31, while the The rolling bearing 35 is located in the first section 361 of the abutting groove 36 with a relatively deep depth.

As shown in Figure 6, when the valve port 25 is about to be closed, the drive shaft 11 of the power cylinder 10 can drive the gate plate group 30 along the axial direction of the drive shaft 11, that is, the direction parallel to the valve port 25, to the direction of the open end 21. move. When the gate group 30 is close to the position aligned with the valve port 25, the bearing 411 of the pressure end 41 will first contact the stopper 50, and as the drive shaft 11 continues to move, the stopper 50 will The pressing end 41 exerts a reverse force to press the pressing rod 40 . Wherein, since the pivot point (pivot point A shown in the figure) between the linkage rod 42 and the main flashboard 31 is a fixed axis, when the pressure end 41 of the pressure rod 40 is pressed, the linkage rod 42 is driven. Take the pivot point A as the axis, and swing counterclockwise as shown in the figure, so that the pressure rod 40 pushes the airtight gate 32 to move away from the main gate 31, and then makes the airtight gate 32 move toward the valve port 25 The direction closes displacement until the airtight gate 32 really tightly closes the valve port 25 (as shown in FIG. 7 ).

Simultaneously, since the main gate 31, the two parallel connecting rods 33 and the airtight gate 32 form a parallelogram linkage, when the pressing rod 40 pushes the airtight gate 32 to move, it can ensure that the airtight gate 32 The upper and lower ends are displaced evenly, so that the airtight gate 32 can be evenly abutted against the valve port 25, so as to avoid insufficient air density caused by partial uneven application of force.

Furthermore, as shown in Figures 8 and 9, when the airtight gate 32 moves, the rolling bearings 35 will be displaced to the second section 362 of the abutting groove 36, and because the depth design of the second section 362 can When the airtight ram 32 is kept away from the main ram 31 , the rolling bearing 35 can still be pressed against the airtight ram 32 . In this way, when the size of the connecting rod gate valve of the present invention is large, multiple sets of rolling bearings 35 and abutment grooves 36 can be provided to disperse the reaction force on the airtight gate plate 32 and prevent the airtight gate plate 32 from bending deformation, to ensure the airtightness of the airtight gate 32 and the valve port 25, and to increase product reliability and service life.

Conversely, when the utility model intends to open the valve port 25 in the reverse direction, it is only necessary to use the power cylinder 10 to drive the drive shaft 11 and the gate group 30 to descend, and the bearing part 411 of the pressing end 41 is separated from the stopper part 50 gradually. , these spring members 37 can make the main flashboard 31 and the airtight flashboard 32 return to the tight state by means of the force of elastic recovery, so that the airtight flashboard 32 can be separated from the valve port 25 and the valve port 25 can be opened.

In addition, compared with the prior art, the utility model has the advantages of simple, convenient and rapid maintenance. During maintenance, only the top cover 22 needs to be opened, and the bolts 311 used for fixing the gate group 30 and the drive shaft 11 are unloaded, that is, The whole set of flashboard sets 30 can be taken out for maintenance or the whole set can be replaced, which can greatly reduce the time of machine downtime for maintenance.

Utility model Although the utility model is described with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the utility model. The above-mentioned embodiments are only used to illustrate the utility model, and are not intended to limit the scope of the utility model. All modifications or changes that do not violate the spirit of the utility model belong to the category intended to be protected by the utility model.

Claims (9)

1. A connecting rod gate valve, characterized in that, comprising: at least one power cylinder having an axially movable drive shaft; Hollow valve body, one end of the valve body is an open end, the open end is provided with a top cover, and the other end is provided with a power cylinder seat for the installation of the power cylinder, and a power cylinder seat is installed through the power cylinder seat A shaft hole for the drive shaft to penetrate into the valve body; wherein, at least one valve port is provided on the side of the valve body close to the open end; The ram set in the valve body, the ram set has two adjacently arranged main rams and an airtight ram, the main ram is connected to the end of the drive shaft; wherein, the main The gate and the ends of the airtight gate are connected by at least one parallel connecting rod; At least one pressing rod, one end of the pressing rod is pivotally connected to the end of the airtight gate, and the other end extends toward the top cover to form a pressing end, wherein the middle section of the pressing rod is pivotally connected There is a linkage rod, the other end of which is pivotally connected to the end of the main flashboard. 2. The connecting rod gate valve according to claim 1, characterized in that a bearing is provided at the pressing end. 3. The connecting rod gate valve according to claim 1, wherein the valve body is provided with at least one stopper at the open end. 4. The connecting rod gate valve according to claim 3, wherein the valve body is provided with two arc holes corresponding to the stopper at the inner wall of the open end, and the two ends of the stopper are circular Curved ends. 5. The connecting rod gate valve according to claim 4, characterized in that, the stopper is provided with a clamping end protruding relative to the side of the top cover, and the inside of the top cover is concavely provided with a clamping end. positioning slot. 6. The connecting rod gate valve according to claim 4, wherein the length of the stopper is greater than the opening width of the open end. 7. The connecting rod gate valve according to claim 1, characterized in that at least one slot runs through the main gate plate, the inner shaft of the slot is provided with a rolling bearing, and at least a part of the rolling bearing protrudes from the The surface of the main ram adjacent to the side of the airtight ram, moreover, the airtight ram is also concavely provided with abutting grooves for accommodating the rolling bearing. 8. The connecting rod gate valve according to claim 7, wherein the abutting groove has a first section and a second section, the depth of the first section is greater than that of the second section, and the second section The segment is located at the end of the abutment slot proximate to the open end. 9. The connecting rod gate valve according to claim 1, characterized in that at least one spring member is provided between the main gate plate and the airtight gate plate.