Knife gate valve for ore pulp

Abstract

The invention discloses a knife gate valve for ore pulp, and relates to the technical field of knife gate valves, the knife gate valve comprises a valve body, a support and a fixing plate, external flange plates are installed on the two sides of the valve body, the support is installed at the top end of the valve body, the fixing plate is arranged at the top end of the support, and an air cylinder is arranged in the fixing plate; a cylinder is arranged in the valve body, a disconnecting link body penetrating through the valve body is installed at the output end of the cylinder, a moving groove is formed in the valve body, a sliding rail is installed at the bottom end in the moving groove, a sealing air bag is arranged in the moving groove, and external connection blocks are installed at the top end and the bottom end of the sealing air bag; the device is provided with a positive and negative screw rod for driving the moving block to move left and right in the sliding rail, then the moving block drives the I-shaped frame to be inserted into the external connection block, the position of the sealing air bag at the moving groove is conveniently fixed, the structure is simple to operate, the structure is simple, the structure is convenient to operate, and the practicability is high. And the sealing air bag can be conveniently mounted and dismounted.

Description

Technical Field

[0001] The present invention relates to the technical field of knife gate valves, and specifically to a knife gate valve for pulp slurry. Background Art

[0002] A knife gate valve, also known as a knife-type gate valve, knife gate valve, slurry valve, or mud valve, has a gate plate as its closing member. The movement direction of the gate plate is perpendicular to the fluid direction, and it cuts off the medium with a blade-shaped gate plate that can cut fibrous materials. The gate plate has two sealing surfaces. In the most common type of gate valve, the two sealing surfaces form a wedge shape, and the wedge angle varies with the valve parameters, usually being 5°. The gate plate of a wedge-type knife gate valve can be made as a single piece, called a rigid gate plate; it can also be made into a gate plate that can produce a small amount of deformation to improve its processability and compensate for the deviation in the sealing surface angle during the processing. This type of gate plate is called an elastic gate plate.

[0003] However, the existing knife gate valves for pulp slurry have the following problems during use: In the traditional processing method, the inner sealing ring of the knife gate valve is a vulnerable part and needs to be removed and replaced. When the existing sealing ring is installed, it is not firmly fixed and is prone to deviation, resulting in a large installation difficulty. Summary of the Invention

[0004] The purpose of the present invention is to provide a knife gate valve for pulp slurry to solve the related problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A knife gate valve for pulp slurry, including a valve body, a bracket, and a fixing plate. External flange plates are installed on both sides of the valve body. A bracket is installed at the top of the valve body, and a fixing plate is provided at the top of the bracket. A cylinder is arranged inside the fixing plate, and the output end of the cylinder is installed with a knife gate body that penetrates the valve body. A moving groove is opened inside the valve body, and a slide rail is installed at the bottom end inside the moving groove. A sealing airbag is arranged inside the moving groove, and external blocks are installed at the top and bottom ends of the sealing airbag. A clamping mechanism for fixing the position of the external block in the moving groove is arranged inside the slide rail.

[0006] In the knife gate valve for pulp slurry provided by this technical solution, reinforcing ribs are installed inside the knife gate body, and the shape of the reinforcing ribs is I-shaped.

[0007] In the knife gate valve for pulp slurry provided by this technical solution, an anti-corrosion coating is provided on the outer wall of the knife gate body.

[0008] In the knife gate valve for pulp slurry provided by this technical solution, the anti-corrosion coating is an epoxy resin coating.

[0009] A knife gate valve for pulp provided by the present technical solution, the clamping mechanism includes a moving block and an I-shaped frame. The moving block is arranged inside the slide rail, and an I-shaped frame is installed at the top of the moving block and penetrates through the moving groove and extends into the external block.

[0010] A knife gate valve for pulp provided by the present technical solution, a positive and negative lead screw is installed inside the moving groove through a bearing, a knob is installed on the outer wall of the positive and negative lead screw, and a positioning plug rod is inserted into the outer wall of the knob.

[0011] Compared with the prior art, the present invention provides a knife gate valve for pulp, which has the following beneficial effects: 1. In the present invention, reinforcing ribs are arranged between the knife gate bodies to increase the strength and prevent deformation and damage due to impact. In addition, an epoxy resin anti-corrosion coating is added to the outer wall of the knife gate body. Since the epoxy resin molecular structure contains highly polar hydroxyl groups and ether bonds, the coating has good chemical resistance, good alkali resistance, and better heat resistance to alkaline media. Also, because its structure contains rigid benzene rings and head-shaped hydrocarbon chains arranged alternately, the physical and mechanical properties of the coating are also quite good.

[0012] 2. In the present invention, by rotating the knob to drive the positive and negative lead screw to rotate, the positive and negative lead screw drives the moving block to move left and right in the slide rail, and then the moving block drives the I-shaped frame to insert into the external block, facilitating the fixation of the position of the sealing airbag at the moving groove. This structure is simple to operate, facilitating the positioning, installation, and removal of the sealing airbag, and solving the problems of difficult installation and easy deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic main sectional view structure diagram of the present invention; Figure 2 It is of the present invention Figure 1 The enlarged structure diagram of part A; Figure 3 It is a schematic right sectional view structure diagram of the valve body of the present invention; Figure 4 It is a schematic right sectional view structure diagram of the present invention; Figure 5 It is a schematic right view structure diagram of the present invention.

[0014] In the figure: 1. Valve body; 2. External flange; 3. Bracket; 4. Fixed plate; 5. Cylinder; 6. Moving groove; 7. Slide rail; 8. Moving block; 9. I-shaped frame; 10. Positive and negative lead screw; 11. Knob; 12. External block; 13. Sealing airbag; 14. Knife gate body; 15. Reinforcing rib. DETAILED DESCRIPTION OF THE INVENTION

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0016] Embodiment 1, as Figure 1-2 shown, the present invention provides a technical solution: a knife gate valve for pulp, including a valve body 1, a bracket 3 and a fixing plate 4. External flange plates 2 are installed on both sides of the valve body 1. A bracket 3 is installed at the top of the valve body 1, and a fixing plate 4 is arranged at the top of the bracket 3. A cylinder 5 is arranged inside the fixing plate 4, and a knife gate body 14 passing through the valve body 1 is installed at the output end of the cylinder 5. A reinforcing rib 15 is installed inside the knife gate body 14, and the shape of the reinforcing rib 15 is in the shape of an I. An anti-corrosion coating is provided on the outer wall of the knife gate body 14, and the anti-corrosion coating is an epoxy resin coating. By arranging a reinforcing rib 15 between the knife gate bodies 14, the strength is increased, and it will not be deformed and damaged due to impact. In addition, by adding an epoxy resin anti-corrosion coating on the outer wall of the knife gate body 14, since the epoxy resin molecular structure contains highly polar hydroxyl groups and ether bonds, the coating has good chemical resistance, good alkali resistance, and better heat-resistant alkaline medium resistance. Also, because its structure contains an alternating arrangement of rigid benzene rings and head-shaped hydrocarbon chains, the physical and mechanical properties of the coating are also quite good, which is convenient for improving the anti-corrosion performance of the knife gate body 14.

[0017] Embodiment 2, as Figure 1-5 shown, the present invention provides a technical solution: a knife gate valve for pulp, wherein a moving groove 6 is opened inside the valve body 1, and a slide rail 7 is installed at the bottom end inside the moving groove 6. A sealing airbag 13 is arranged inside the moving groove 6, and external blocks 12 are installed at the top and bottom of the sealing airbag 13. A clamping mechanism for fixing the position of the external block 12 in the moving groove 6 is arranged inside the slide rail 7. The clamping mechanism includes a moving block 8 and an I-shaped frame 9. A moving block 8 is arranged inside the slide rail 7, and an I-shaped frame 9 passing through the moving groove 6 and extending into the external block 12 is installed at the top of the moving block 8. A positive and negative lead screw 10 is installed inside the moving groove 6 through a bearing, and a rotary knob 11 is installed on the outer wall of the positive and negative lead screw 10. A positioning plug rod is inserted into the outer wall of the rotary knob 11. By rotating the rotary knob 11, the positive and negative lead screw 10 is driven to rotate, so that the positive and negative lead screw 10 drives the moving block 8 to move left and right inside the slide rail 7, and then the moving block 8 drives the I-shaped frame 9 to insert into the external block 12, which is convenient for fixing the position of the sealing airbag 13 at the moving groove 6. This structure is simple to operate and is convenient for installing and removing the sealing airbag 13, solving the problems of difficult installation and easy deviation.

[0018] Working principle: First, connect the external power supply. The operator pushes the reinforcing rib 15 through the starting cylinder 5 to squeeze the sealing air bags 13 on both sides. The reinforcing rib 15 is inserted into the bottom end of the valve body 1. The sealing air bags 13 are used to squeeze and seal the position of the knife gate body 14, so as to block the substances entering from the positions of the two groups of external flange plates 2. At this time, the rotary knob 11 is rotated to drive the positive and negative lead screw 10 to rotate. Thus, the positive and negative lead screw 10 drives the moving block 8 to move left and right in the slide rail 7. Furthermore, the moving block 8 drives the I-shaped frame 9 to be inserted into the external block 12, which is convenient for fixing the sealing air bag 13 at the position of the moving groove 6. This structure is simple to operate and is convenient for installing and removing the sealing air bag 13, solving the problems of difficult installation and easy deviation.

[0019] Moreover, there is a reinforcing rib 15 arranged between the knife gate bodies 14 to increase the strength and prevent deformation and damage caused by impact. In addition, an epoxy resin anti-corrosion coating is added to the outer wall of the knife gate body 14. Since the epoxy resin molecular structure contains highly polar hydroxyl groups and ether bonds, the coating film has good chemical resistance, good alkali resistance, and better heat and alkali resistance. Also, because its structure contains an alternating arrangement of rigid benzene rings and head-shaped hydrocarbon chains, the physical and mechanical properties of the coating film are also quite good, which is convenient for improving the anti-corrosion performance of the knife gate body 14.

[0020] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than a limitation on the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art does not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A knife gate valve for slurry, comprising a valve body (1), a bracket (3) and a fixing plate (4), characterized in that: External flanges (2) are installed on both sides of the valve body (1); a bracket (3) is installed on the top of the valve body (1), and a fixing plate (4) is arranged on the top of the bracket (3); a cylinder (5) is arranged inside the fixing plate (4), and a knife gate body (14) penetrating the valve body (1) is installed at the output end of the cylinder (5); a movable groove (6) is opened inside the valve body (1), and a slide rail (7) is installed at the bottom end of the movable groove (6); a sealing airbag (13) is arranged inside the movable groove (6), and external blocks (12) are installed at the top and bottom ends of the sealing airbag (13); a clamping mechanism for fixing the position of the external block (12) in the movable groove (6) is arranged inside the slide rail (7).

2. A knife gate valve for slurry according to claim 1, characterized in that: A reinforcing rib (15) is installed on the inner side of the knife switch body (14), and the reinforcing rib (15) is in an I-shaped shape.

3. A knife gate valve for slurry according to claim 1, characterized in that: The outer wall of the knife switch body (14) is provided with anti-corrosion paint.

4. A knife gate valve for slurry according to claim 3, characterized in that: The anti-corrosion coating is epoxy resin coating.

5. The knife gate valve for slurry according to claim 1, characterized in that: The clamping mechanism comprises a moving block (8) and a workpiece frame (9); the moving block (8) is arranged inside the slide rail (7), and the workpiece frame (9) is installed on the top of the moving block (8) and passes through the moving groove (6) and extends to the inside of the external block (12).

6. A knife gate valve for slurry according to claim 5, characterized in that: A forward and reverse screw rod (10) is installed inside the movable groove (6) via a bearing, and a rotating knob (11) is installed on the outer wall of the forward and reverse screw rod (10), and an insertion rod for positioning is inserted into the outer wall of the rotating knob (11).

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