Totally enclosed channel vacuum box blind valve

Abstract

This utility model relates to the field of vacuum valve technology and discloses a fully enclosed channel vacuum box-type blind valve, which solves the problems mentioned in the background art. It includes a drive device, valve body, valve plate, bracket, telescopic cylinder, and dovetail sealing ring. The valve body is divided into two parts: a medium flow pipeline and a cavity for accommodating the valve plate when fully open. A valve body sealing surface is provided near the low pressure in the medium flow pipeline. A sliding guide rail is provided at the bottom of the valve body for axial sliding of the bracket and valve plate on the valve body. A dovetail sealing ring is installed on the valve plate near the low pressure. The upper part of the valve plate is a sliding guide rail with multiple cylindrical rollers arranged in the U-shaped groove of the guide rail. The lower part of the valve plate is a guide rib. The bracket has a double-layer frame structure. This utility model has the advantages of good flow guidance effect, reliable sealing, low operating torque, and long service life for the fully enclosed channel box-type blind valve.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum valve technology, specifically a fully enclosed channel vacuum box type blind valve. Background Technology

[0002] Vacuum box-type blind valves are components used in vacuum systems to cut off or connect pipelines. In traditional box-type blind valves, the sealing surfaces on the valve plate and valve body rub against each other during opening and closing, leading to wear on the sealing surfaces during use. Additionally, the operating torque for opening and closing the valve is relatively large. When the traditional vacuum box-type blind valve is open, a cavity much larger than the pipeline flow channel appears in the original position of the valve plate. When gas flows through this cavity, eddies are generated within the valve body, disrupting the original flow pattern. This is unacceptable for applications requiring stable gas flow in the pipeline. Therefore, we have proposed a fully enclosed channel vacuum box-type blind valve. Utility Model Content

[0003] To address the problems mentioned in the background art, this utility model provides the following technical solution: a fully enclosed channel vacuum box type blind valve, comprising a drive device, a valve body, a valve plate, a bracket, a telescopic cylinder, and a dovetail-shaped sealing ring. The valve body is divided into two parts: a medium flow pipeline and a cavity for accommodating the valve plate when fully open. A valve body sealing surface is provided near the low pressure area in the medium flow pipeline. A sliding guide rail is provided at the bottom of the valve body for axial sliding of the bracket and the valve plate on the valve body. A dovetail-shaped sealing ring is installed on the valve plate near the low pressure area. The upper part of the valve plate is a sliding guide rail, and multiple cylinders are arranged in the middle of the U-shaped groove of the guide rail. The valve plate has guide ribs at the bottom and a double-layer frame structure. The upper part of the support has two roller guide rails in the middle of the double-layer structure, the lower part of the support has guide grooves, and the bottom of the support has multiple rollers. The telescopic cylinder slides on the valve body cylinder. When the valve is fully open, the telescopic cylinder moves to the valve body sealing surface to form a fully enclosed channel. The drive device is divided into three parts. The first part is the translational movement of the valve plate on the support, which is completed by the engagement of the electric drive gear plate with the cylindrical rollers on the valve plate. The second part is the sliding of the support on the valve body guide rails by multiple electric cylinders. The third part is the sliding of the telescopic cylinder on the valve body sliding surface by multiple electric cylinders.

[0004] In the above technical solution, the valve plate is suspended from the upper guide rail onto two cylindrical guide rails on the upper part of the bracket.

[0005] In the above technical solution, the lower guide rib of the valve plate engages with the guide groove below the bracket.

[0006] In the above technical solution, the roller at the bottom of the bracket slides on the guide rail at the bottom of the valve body.

[0007] In the above technical solution, a valve plate limiting block is provided on the valve plate to control the compression of the dovetail-shaped sealing ring.

[0008] In the above technical solution, the telescopic cylinder slides on the valve body. When the valve is fully open, it can close the medium passage.

[0009] In the above technical solution, the valve plate moves horizontally on the bracket, which is accomplished by the engagement of the gear plate driven by the electric drive with the cylindrical rollers on the valve plate.

[0010] In the above technical solution, the sliding of the bracket on the valve body guide rail is driven by one or more electric cylinders.

[0011] In the above technical solution, the telescopic cylinder slides on the valve body. It is driven by one or more electric cylinders.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] When fully open, this vacuum box-type blind valve forms a fully enclosed flow channel through the movement of the telescopic cylinder. The airflow will not enter the valve body cavity when it flows through the valve, ensuring the stability of the airflow. During the opening and closing process, the valve plate sealing ring does not contact the valve body sealing surface. During the translation process, the valve plate only needs to overcome the friction generated by its own weight, requiring little driving force. At the same time, the dovetail-shaped sealing ring has a long service life. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 AA section view;

[0017] Figure 3 for Figure 1 View from P direction;

[0018] Figure 4 for Figure 3 BB section view;

[0019] Figure 5 for Figure 3 CC section view;

[0020] Figure 6 for Figure 1 DD section view;

[0021] Figure 7for Figure 1 Enlarged view of I;

[0022] Figure 8 for Figure 2 Enlarged view of section II;

[0023] In the diagram: 1. Valve body; 2. Bracket; 3. Valve plate; 4. Electric actuator (valve plate drive device); 5. Electric cylinder (bracket drive device); 6. Electric cylinder (telescopic cylinder drive device); 7. Telescopic cylinder; 8. Gear disc; 9. Roller guide rail; 10. Dovetail seal ring; 11. Valve body sealing surface; 12. Cylindrical roller; 13. Roller; 14. Guide rail; 15. Valve plate limiting block; 16. Bracket guide groove; 17. Valve plate guide rib; 18. Valve plate guide rail. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1 , Figure 2 and Figure 3 The illustrated fully enclosed flow channel vacuum box type blind valve includes a valve body 1, a bracket 2, a valve plate 3, an electric actuator (valve plate drive device) 4, an electric cylinder 5 (bracket drive device), an electric cylinder 6 (telescopic cylinder drive device), a telescopic cylinder 7, and a gear disc 8. The valve body 1 is divided into two parts: one part is the medium flow pipeline, and the other part is the cavity that accommodates the valve plate when fully open. A valve body sealing surface is provided near the low pressure in the medium flow pipeline. A dovetail-shaped sealing ring 10 is provided on the valve plate 3. Driven by the electric cylinder, the dovetail-shaped sealing ring 10 is attached to the valve body sealing surface to form a seal under the action of medium pressure.

[0026] In the above technical solution, the valve plate is suspended on two roller guide rails 9 on the bracket via the valve plate guide rail 18. The translation of the valve plate 3 is carried out on the two roller guide rails 9. During the translation process, it is only necessary to overcome the frictional force generated by the self-weight of the valve plate 2.

[0027] In the above technical solution, the valve plate cooperates with the bracket guide groove 16 through the valve plate guide rib 17 to ensure that the valve plate 3 does not rotate during the translation process.

[0028] In the above technical solution, the bracket 2 is placed on the guide rail 14 on the valve body 1 by the lower roller 13. The axial movement of the bracket is carried out on the valve body guide rail 14. During the translation process, it is only necessary to overcome the frictional force generated by the self-weight of the bracket 2 and the valve plate 3.

[0029] In the above technical solution, the telescopic cylinder 7 slides on the valve body cylinder. When the valve is fully open, the telescopic cylinder 7 moves to the valve body sealing surface 11 to form a closed channel.

[0030] In the above technical solution, during the translation process, there is a 10mm gap between the valve plate 3 and the valve body sealing surface 11 and the telescopic cylinder 7. During the translation process, it is only necessary to overcome the frictional force generated by its own weight, which effectively reduces the wear of the dovetail sealing ring 10 on the valve plate 3.

[0031] In the above technical solution, the valve plate 3 moves translationally on the bracket 2, which is accomplished by the electric drive gear plate 8 engaging with the cylindrical roller 12 on the valve plate.

[0032] In the above technical solution, the sliding of the bracket 2 on the valve body guide rail 14 is driven by one or more electric cylinders 5.

[0033] In the above technical solution, the telescopic cylinder 7 slides on the valve body and is driven by one or more electric cylinders 6.

[0034] Working principle: Opening process: The telescopic cylinder 7 moves upstream a certain distance driven by the electric cylinder 6. The bracket 2 and valve plate 3 move upstream driven by the electric cylinder 5, creating a gap between the valve plate 3, the valve body sealing surface 11, and the telescopic cylinder 7. Driven by the electric actuator 4, the gear plate 8 engages with the cylindrical roller 12 on the valve plate 3 and moves towards the valve body cavity. The telescopic cylinder 7 moves downstream driven by the electric cylinder 6 to the valve body sealing surface 11 to form a closed channel.

[0035] Closing process: The telescopic cylinder 7 is driven by the electric cylinder 6 to move a certain distance upstream, leaving space for the bracket 2 and valve plate 3. Driven by the electric cylinder 4, the gear plate 8 engages with the cylindrical roller 12 on the valve plate 3 and moves towards the center of the pipeline. The bracket 2 and valve plate 3 are driven by the electric cylinder 5 to move downstream, so that the dovetail sealing ring 10 on the valve plate 3 forms a seal with the valve body sealing surface 11. The telescopic cylinder 7 is driven by the electric cylinder 6 to move downstream and press against the valve plate 3.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A full-closed passage vacuum box blind valve, characterized in that: The system includes a drive unit, valve body, valve plate, bracket, telescopic cylinder, and dovetail sealing ring. The valve body is divided into two parts: a medium flow pipeline and a cavity that accommodates the valve plate when fully open. A valve body sealing surface is located near the low-pressure area in the medium flow pipeline. A sliding guide rail is provided at the bottom of the valve body for axial sliding of the bracket and valve plate on the valve body. A dovetail sealing ring is installed on the valve plate near the low-pressure area. The upper part of the valve plate is a sliding guide rail with multiple cylindrical rollers in the U-shaped groove of the guide rail. The lower part of the valve plate is a guide rib. The bracket has a double-layer frame structure. Two roller guide rails are located in the middle of the double-layer structure at the upper part of the bracket. A guide groove is provided at the lower part of the bracket. Multiple rollers are provided at the bottom of the bracket. The drive unit is divided into three parts: the first part is the translational movement of the valve plate on the bracket, which is accomplished by the engagement of an electric drive gear plate with the cylindrical rollers on the valve plate; the second part is the sliding of the bracket on the valve body guide rail driven by multiple electric cylinders; and the third part is the sliding of the telescopic cylinder on the sliding surface of the valve body driven by multiple electric cylinders.

2. The fully enclosed channel vacuum box blind valve of claim 1, wherein: The valve plate is suspended from the upper guide rail onto two cylindrical guide rails on the upper part of the bracket, and the lower guide rib of the valve plate engages with the guide groove below the bracket.

3. The fully enclosed channel vacuum box blind valve of claim 2, wherein: The rollers at the bottom of the bracket slide on the guide rail at the bottom of the valve body.

4. The fully enclosed channel vacuum box blind valve of claim 3, wherein: A valve plate limiting block is provided on the valve plate to control the compression of the dovetail-shaped sealing ring.

5. The fully enclosed channel vacuum box blind valve of claim 4, wherein: The telescopic cylinder slides on the valve body and can close the medium passage when the valve is fully open.

6. The fully enclosed channel vacuum box blind valve of claim 5, wherein: The valve plate moves horizontally on the support, which is accomplished by the engagement of the gear plate driven by the electric drive with the cylindrical rollers on the valve plate.

7. The fully enclosed channel vacuum box blind valve of claim 6, wherein: The sliding of the bracket on the valve body guide rail is driven by one or more electric cylinders.

8. The fully enclosed channel vacuum box blind valve of claim 7, wherein: The telescopic cylinder slides on the valve body and is driven by one or more electric cylinders.

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