CN219062445U

CN219062445U - Pneumatic vacuum baffle valve

Info

Publication number: CN219062445U
Application number: CN202223613432.9U
Authority: CN
Inventors: 盛一冰; 何善良; 姚勇
Original assignee: Ningbo Instrument Valve Factory
Current assignee: Ningbo Instrument Valve Factory
Priority date: 2022-12-31
Filing date: 2022-12-31
Publication date: 2023-05-23
Anticipated expiration: 2032-12-31

Abstract

The utility model provides a pneumatic vacuum baffle valve which comprises a valve body, a valve plate, a valve cover and an air cylinder, wherein the valve cover is arranged at the upper opening end of the valve body; a sliding bearing is arranged between the inner wall of the lower end of the shaft sleeve and the outer wall of the piston rod, and a sealing assembly is arranged between the inner wall of the upper end of the shaft sleeve and the piston rod; a guide assembly and an elastic piece are arranged between the shaft sleeve and the valve plate, so that the valve plate always has a downward movement trend. The utility model provides a pneumatic vacuum baffle valve which can effectively ensure stable lifting of a valve plate, has stable sealing performance and is not easy to fail.

Description

Pneumatic vacuum baffle valve

Technical Field

The utility model relates to the technical field of baffle valves, in particular to a pneumatic vacuum baffle valve.

Background

The vacuum baffle valve is used for switching on or switching off the air flow in the vacuum pipeline, and has the characteristics of reliable sealing, large conductance, good safety, manual control, electric control, pneumatic control and the like, various forms, complete specifications, nominal size DN 150-1200, reasonable structure and the like, so the vacuum baffle valve is widely used in vacuum systems of large and medium-sized various vacuum devices, such as vacuum coating equipment, vacuum heat treatment furnaces, vacuum brazing, high-vacuum electron beam welding machines, ion beam etching equipment, space ring die equipment and the like. At present, vacuum baffle valves can be divided into electric vacuum baffle valves and pneumatic vacuum baffle valves according to the type of driving force.

In the pneumatic vacuum baffle valve structure, the valve plate is driven to move up and down through the air cylinder to realize opening or closing of the air outlet, and in the prior art, as the valve plate is connected by the slender connecting rod, the connecting rod is easy to deflect in the moving process of the valve plate, so that the planeness of the valve plate is influenced, and finally the sealing performance of the valve plate to the air outlet is influenced.

Disclosure of Invention

The pneumatic vacuum baffle valve solves the problems of overcoming at least one defect in the prior art, and can effectively ensure stable lifting of the valve plate, stable sealing performance and difficult failure.

In order to solve the problems, the utility model provides a pneumatic vacuum baffle valve, which comprises a valve body, a valve plate, a valve cover and a cylinder, wherein the valve cover is arranged at the upper opening end of the valve body, the cylinder is arranged on the valve cover, a piston rod of the cylinder extends into the valve body to be connected with the valve plate, an air outlet is formed in the bottom wall of the valve body, an air inlet is formed in the side wall of the valve body, the expansion and contraction of the cylinder are used for driving the valve plate to seal or open the air outlet, a shaft sleeve extending towards the inner cavity of the valve body is arranged on the valve cover at a position corresponding to the cylinder in a penetrating manner, and the piston rod of the cylinder is slidably arranged in the shaft sleeve; a sliding bearing is arranged between the inner wall of the lower end of the shaft sleeve and the outer wall of the piston rod, and a sealing assembly is arranged between the inner wall of the upper end of the shaft sleeve and the piston rod; the valve plate is characterized in that three guide rods which are vertically arranged and uniformly distributed along the circumference of the lower end face of the valve cover are connected to the lower end face of the valve cover, three guide sleeves which are respectively and slidably assembled outside the guide rods are connected to the upper end face of the valve plate, and an elastic piece is arranged between the upper end face of the valve plate and the lower end face of the valve cover, so that the valve plates always have downward movement tendency.

Compared with the prior art, the pneumatic vacuum baffle valve has the following advantages:

in the pneumatic vacuum baffle valve structure, the cylinder is connected to the valve cover, the valve cover is provided with the corresponding shaft sleeve, one end of the shaft sleeve extends into the inner cavity of the valve body, and the piston rod of the cylinder is in sliding and sealing fit in the shaft sleeve; the sliding bearing is further arranged on the inner wall of one end of the shaft sleeve, which is positioned in the inner cavity of the valve body, so that the running stability of the piston rod is ensured; in the structure, the valve plate is provided with the air inlet, the air outlet is provided with the air outlet, the air inlet is provided with the air inlet, the air outlet is provided with the air outlet, the air outlet is provided with the air inlet, the air outlet is provided with the air outlet, the air inlet is provided with the air outlet, and the air outlet is provided with the air inlet; and be equipped with the guide bar in the valve gap lower extreme, the valve plate upper end be equipped with guide bar sliding fit's uide bushing, the stability of assurance valve plate that can be better goes up and down further guarantees sealing performance's stability.

Further, the elastic piece comprises three springs which are respectively sleeved outside the guide rods, and the upper end and the lower end of each spring are respectively abutted against the lower end of the valve plate and the upper end face of the guide sleeve. In the structure, the spring is selected as the elastic piece, so that the structure is simple and the installation is convenient; and the spring can be sleeved outside the guide rod, so that the stability is high during compression.

The improved valve plate is characterized in that an annular dovetail groove is formed in the lower end face of the valve plate, a first sealing ring is assembled in the dovetail groove, and the lower end face of the first sealing ring protrudes outwards from the lower end face of the valve plate. In the improved structure, the first sealing ring is arranged on the valve plate in a ordering mode, so that the sealing effect can be improved; in addition, the arrangement of the dovetail groove can effectively prevent the first sealing ring from falling off.

Still further, the sealing assembly comprises two second sealing rings, a shaft collar and a gland, and a mounting groove is formed in the inner wall of the shaft sleeve, which is close to one end of the air cylinder; the inner ring of the two second sealing rings is sealed and arranged outside the piston rod, the outer rings of the two second sealing rings are arranged in the mounting groove, the radial outer end of the shaft collar is arranged in the mounting groove and between the two second sealing rings, the radial inner end of the shaft collar is in sliding fit with the outer wall of the piston rod, and the gland is arranged at the outer end of the mounting groove, so that the two sealing shafts are mutually abutted along the axial direction. In the structure, the sealing assembly comprises two second sealing rings, so that the sealing performance is improved; and set up the axle collar between two second sealing washer, can realize radial spacing, guarantee the sealed face symmetry of upper and lower two second sealing washer.

The valve cover is provided with a pressing plate for installing the air cylinder, and the inner end of the pressing plate is tightly abutted and limited at the outer end of the shaft sleeve; the gland is assembled on the upper end face of the positioning convex plate. Among the above-mentioned improvement structure, the setting of clamp plate makes things convenient for the installation of cylinder promptly, can realize again that the support of axle sleeve presses spacing for the axle sleeve does not need other fasteners with being connected of valve plate, simplifies connection structure.

And the valve plate is characterized in that two connecting blocks which are split in opposite directions are detachably connected to the upper end of the valve plate, and an installation cavity for accommodating the connecting part at the lower end of the piston rod is formed between the two connecting blocks. The connecting plate at the lower end of the piston rod is connected through the two connecting blocks which are oppositely arranged in the improved structure, and the structure is simple and the disassembly and the assembly are convenient.

Drawings

FIG. 1 is a schematic illustration of the structure of an inventive pneumatic vacuum flapper valve;

fig. 2 is an enlarged view of the structure at X in fig. 1.

Reference numerals illustrate:

1. a valve body; 2. a valve plate; 3. a valve cover; 4. a cylinder; 5. an air outlet; 6. an air inlet; 7. a shaft sleeve; 8. a sliding bearing; 9. an elastic member; 10. a guide rod; 11. a guide sleeve; 12. a second seal ring; 13. a collar; 14. a gland; 15. a mounting groove; 16. a countersunk through hole; 17. positioning a convex plate; 18. a pressing plate; 19. and (5) connecting a block.

Detailed Description

In order that the above-recited objects, features and advantages of the utility model will become more readily apparent, a more particular description of embodiments of the utility model will be rendered by reference to the appended drawings.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper end", "lower end", "outer side wall", "bottom wall", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.

In the description of the utility model, it should be noted that, unless explicitly specified and defined otherwise, the term "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium,

may be a communication between the interiors of the two elements. The specific meaning of the above terms in the utility model will be understood by those of ordinary skill in the art in the specific 5-way.

As shown in fig. 1 and 2, the present utility model provides a pneumatic vacuum flapper valve comprising a valve body 1, a valve plate 2, a valve cover 3 and a cylinder 4, wherein the upper portion of the valve body 1 is opened, the valve cover 3 is installed at the upper open end of the valve body 1, and the cylinder 4 is vertically installed on the valve cover 3, and further, a piston of the cylinder 4

The rod extends into the valve body 1 and is detachably connected to the upper end face of the valve plate 2, specifically, two connecting blocks 19 which are split are connected to the upper end of the valve plate 20, and a mounting cavity for accommodating a connector at the lower end of the piston rod is formed between the two connecting blocks 19.

In the structure, the bottom wall of the valve body 1 is provided with the air outlet 5, the side wall of the valve body 1 is provided with the air inlet 6, the air inlet 6 and the air outlet 5 are vertically distributed and pass through the air cylinder 4

The expansion and contraction of the piston rod of the valve plate 2 to seal or open the air outlet 5; in this embodiment, a shaft sleeve 7 extending towards the inner cavity of the valve body 1 is arranged on the valve cover 3 at a position corresponding to the air cylinder 4 in a penetrating manner, a piston rod of the air cylinder 4 is slidably assembled in the shaft sleeve 7, a sliding bearing 8 is assembled between the inner wall of the lower end of the shaft sleeve 7 and the outer wall of the piston rod, and the sliding bearing 8 ensures that the lifting of the piston rod is more stable and has a certain limiting effect in the radial direction.

In addition, a sealing component is arranged between the inner wall of the upper end of the shaft sleeve 7 and the piston rod; specifically, as shown in fig. 2, the sealing assembly comprises two second sealing rings 12, a shaft collar 13 and a gland 14, and a mounting groove 15 is formed in the inner wall of the shaft sleeve 7, which is close to one end of the cylinder 4; the inner rings of the two second sealing rings 12 are sealed and sleeved outside the piston rod, the outer rings of the two second sealing rings 12 are both arranged in the mounting groove 15, the radial outer ends of the collar 13 are arranged in the mounting groove 15 and positioned between the two second sealing rings 12,

the radial inner end of the collar 13 is in sliding fit with the outer wall of the piston rod, and the gland 14 is assembled at the outer 5 end of the mounting groove 15, so that the two sealing shafts are mutually abutted along the axial direction, and the tightness between the shaft sleeve 7 and the piston rod is better ensured; on the other hand, a countersunk through hole 16 is formed in the valve cover 3 at a position corresponding to the air cylinder 4, a positioning convex plate 17 in sealing fit with a countersunk step of the countersunk channel is arranged at the outer end of the shaft sleeve 7, a pressing plate 18 for installing the air cylinder 4 is arranged on the valve cover 3, and the inner end of the pressing plate 18 is abutted against and limited at the outer end of the shaft sleeve 7; in the structure, the pressing plate 18 is connected with the valve cover 3, so that the abutting limit of the shaft sleeve 7 and the valve cover 3 is realized, no additional fastening piece is needed, the connecting structure is simplified, and the installation is convenient; in the above structure, the pressing cover 14 is detachably fitted on the upper end face of the positioning boss 17 by a connecting screw.

An annular dovetail groove is formed in the lower end face of the valve plate 2, a first sealing ring is assembled in the dovetail groove, and the lower end face of the first sealing ring protrudes outwards from the lower end face of the valve plate 2; the dovetail groove is arranged, so that the connection stability of the first sealing ring and the valve plate 2 is improved, and the first sealing ring is not easy to fall off.

In addition, in the present embodiment, an elastic member 9 is provided between the upper end surface of the valve plate 2 and the lower end surface of the valve cover 3 so that each valve plate 2 always has a tendency to move downward. After the setting, guarantee valve plate 2 that can be better and gas outlet 5 complex leakproofness to when valve plate 2 is in opening, the spring is in compressed state, and in the closed in-process of valve plate 2 of next time, the rebound of valve plate 2 can be guaranteed under the elastic restoring force effect of spring more steadily, and after valve plate 2 and gas outlet 5 complex, under the spring force effect, even if the atmospheric pressure of cylinder 4 takes place subtle change can not lead to valve plate 2 sealed inefficacy yet.

As shown in fig. 1, in this embodiment, three guide rods 10 vertically arranged and circumferentially distributed are connected to the lower end surface of the valve cover 3, and three guide sleeves 11 respectively slidably fitted to the outer portions of the guide rods 10 are connected to the upper end surface of the valve plate 2. In this structure, the cooperation of guide bar 10 and uide bushing 11 makes the lift of piston rod have better guide effect and circumference limiting displacement, further guarantees the stationarity that valve plate 2 goes up and down, and then guarantees valve plate 2 and gas outlet 5 complex sealed effect. The elastic member 9 in this embodiment includes three springs respectively sleeved outside the guide rods 10, the springs and the guide rods 10 can slide relatively, and the upper and lower ends of each spring respectively abut against the lower end of the valve plate 2 and the upper end face of the guide sleeve 11.

Although the present disclosure is disclosed above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the disclosure.

Claims

1. The utility model provides a pneumatic vacuum baffle valve, includes valve body (1), valve plate (2), valve gap (3) and cylinder (4), valve gap (3) are installed the upper portion open end of valve body (1), cylinder (4) are installed on valve gap (3), just the piston rod of cylinder (4) extends to in valve body (1) with valve plate (2) are connected, gas outlet (5) have been seted up on the diapire of valve body (1), gas inlet (6) have been seted up on the lateral wall of valve body (1), the flexible of cylinder (4) is used for the drive valve plate (2) is sealed or is opened gas outlet (5), its characterized in that:

a shaft sleeve (7) extending towards the inner cavity of the valve body (1) is arranged on the valve cover (3) at a position corresponding to the air cylinder (4) in a penetrating way, and a piston rod of the air cylinder (4) is arranged in the shaft sleeve (7) in a sliding way; a sliding bearing (8) is arranged between the inner wall of the lower end of the shaft sleeve (7) and the outer wall of the piston rod, and a sealing component is arranged between the inner wall of the upper end of the shaft sleeve (7) and the piston rod; three guide rods (10) which are vertically arranged and uniformly distributed along the circumferential direction are connected to the lower end face of the valve cover (3), three guide sleeves (11) which are respectively and slidably assembled outside the guide rods (10) are connected to the upper end face of the valve plate (2), and an elastic piece (9) is arranged between the upper end face of the valve plate (2) and the lower end face of the valve cover (3), so that the valve plate (2) always has a downward movement trend.

2. The pneumatic vacuum flapper valve of claim 1, wherein: the elastic piece (9) comprises three springs which are respectively sleeved outside the guide rods (10), and the upper end and the lower end of each spring are respectively abutted against the lower end of the valve plate (2) and the upper end face of the guide sleeve (11).

3. The pneumatic vacuum flapper valve of claim 1 or 2, wherein: an annular dovetail groove is formed in the lower end face of the valve plate (2), a first sealing ring is arranged in the dovetail groove in a matched mode, and the lower end face of the first sealing ring protrudes outwards from the lower end face of the valve plate (2).

4. A pneumatic vacuum flapper valve as claimed in claim 3 wherein: the sealing assembly comprises two second sealing rings (12), a shaft collar (13) and a gland (14), and an installation groove (15) is formed in the inner wall, close to one end of the air cylinder (4), of the shaft sleeve (7); the inner rings of the two second sealing rings (12) are sealed and sleeved outside the piston rod, the outer rings of the two second sealing rings (12) are both assembled in the mounting groove (15), the radial outer ends of the collars (13) are assembled in the mounting groove (15) and are positioned between the two second sealing rings (12), the radial inner ends of the collars (13) are in sliding fit with the outer wall of the piston rod, and the gland (14) is assembled at the outer end of the mounting groove (15) so that the two sealing shafts are mutually abutted along the axial direction.

5. The pneumatic vacuum flapper valve of claim 4, wherein: a countersunk through hole (16) is formed in the valve cover (3) at a position corresponding to the air cylinder (4), a positioning convex plate (17) which is matched with a countersunk step of the countersunk channel in a sealing mode is arranged at the outer end of the shaft sleeve (7), a pressing plate (18) for installing the air cylinder (4) is arranged on the valve cover (3), and the inner end of the pressing plate (18) is abutted against and limited at the outer end of the shaft sleeve (7); the gland (14) is assembled on the upper end face of the positioning convex plate (17).

6. The pneumatic vacuum flapper valve of claim 1, wherein: the upper end of the valve plate (2) is detachably connected with two connecting blocks (19) which are split in opposite directions, and an installation cavity for accommodating the connecting part at the lower end of the piston rod is formed between the two connecting blocks (19).