Flow control valve of isolation tank slurry pump

Abstract

The utility model belongs to the technical field of water isolation pumps, and particularly relates to a flow control valve of an isolation tank slurry pump, which comprises an isolation tank, a first valve body and a second valve body are respectively mounted between the isolation tank and an upper seal head and between the isolation tank and a lower seal head, a floating ball is movably mounted on the inner side of the isolation tank, the first valve body comprises a flange plate, and the inner wall of the flange plate is connected with a connecting ring. The inner wall of the connecting ring is of a conical surface structure, a sealing assembly is installed in the middle of the floating ball and comprises a waistband, the upper side and the lower side of the waistband are oppositely connected with a lower sealing plate and an upper sealing plate which are the same in structure, the lower sealing plate and the upper sealing plate are attached to the inner wall of the connecting ring in a matched mode, and a second sealing gasket is bonded to the lower sealing plate and the upper sealing plate. The contact area of the second sealing gasket and the first valve body and the contact area of the second sealing gasket and the second valve body are increased through the conical contact faces, the buffering effect is improved, the conical faces can play a role in flow guiding, and the situation that gravel is accumulated on the contact faces of the second sealing gasket, and the sealing effect is affected is effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of water isolation pump technology, specifically relating to a flow control valve for an isolation tank slurry pump. Background Technology

[0002] Chinese utility model patent CN209976825U discloses a flow control valve for an isolation tank slurry pump, comprising an isolation tank body, a slurry inlet, a drain outlet, an upper end cap, a lower end cap, a first valve body, a second valve body, and a float. The bottom of the isolation tank body is connected to the slurry inlet, and the right bottom of the upper elbow is provided with a drain outlet. The top of the isolation tank body is provided with an upper end cap, the bottom of the upper end cap is provided with a first valve body, the bottom of the isolation tank body is provided with a lower end cap, and the top of the lower end cap is provided with a second valve body. Limiting flanges are provided on the inner bottom of the first and second valve bodies, and rubber gaskets are provided at the bottom of the first and second valve bodies. A float is located inside the isolation tank body. This flow control valve for the isolation tank slurry pump provides efficient limiting and prevention; the first valve body prevents slurry from entering the clean water zone, and the second valve body prevents clean water from entering the slurry zone, effectively reducing vibration, preventing collision noise, and ensuring better sealing.

[0003] However, the structure of the above-mentioned isolation tank slurry pump flow control valve has the following problems: because the rubber gasket is a flat gasket structure, when the slurry enters the isolation tank, it will accumulate on the rubber gasket. The presence of sand and gravel in the slurry will cause the rubber gasket and the belt to not make sufficient contact, thus affecting the sealing performance. Summary of the Invention

[0004] To address the above problems, the purpose of this utility model is to provide a flow control valve for an isolation tank slurry pump, which solves the problem that in existing isolation tank slurry pump flow control valves, slurry will accumulate on the rubber gasket when it enters the isolation tank, and the presence of sand and gravel in the slurry will cause the rubber gasket and belt to not make sufficient contact, thus affecting the sealing performance.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a flow control valve for an isolation tank slurry pump, comprising an isolation tank, with an upper end cap and a lower end cap respectively connected to the upper and lower ends of the isolation tank. A first valve body is bolted to the upper end cap and the isolation tank, and a second valve body is bolted to the lower end cap and the isolation tank. The first and second valve bodies have the same structure and are arranged opposite to each other. A float ball is movably installed inside the isolation tank. The first valve body includes a flange, and a connecting ring is connected to the inner wall of the flange. The inner wall of the connecting ring has a conical surface structure. A sealing assembly is installed in the middle of the float ball. The sealing assembly includes a belt, and a lower sealing plate and an upper sealing plate with the same structure are connected opposite to the upper and lower sides of the belt. The lower and upper sealing plates are adapted to fit against the inner wall of the connecting ring, and a second sealing gasket is adhered to the lower and upper sealing plates.

[0006] The beneficial effects of this utility model are as follows: the conical contact surface increases the contact area between the sealing gasket and the first valve body and the second valve body, improving the buffering effect. On the other hand, the conical surface formed by the first valve body and the second valve body fitting the sealing gasket can play a guiding role, effectively preventing sand and gravel from accumulating on the contact surface between the first valve body, the second valve body and the sealing gasket, thus affecting the sealing effect.

[0007] In order to effectively ensure the sealing of the connection between the first valve body, the second valve body and the isolation tank, the upper end cap, and the lower end cap;

[0008] As a further improvement to the above technical solution: connecting flanges are welded to both ends of the isolation tank, connecting flanges are welded to the ports of the upper and lower end caps, and sealing gaskets are installed between adjacent connecting flanges and between the connecting flanges and the flange plate.

[0009] The beneficial effects of the above-mentioned further technical solutions are as follows: the sealing gasket and flange bolt connection can effectively ensure the sealing of the connection between the isolation tank, the upper end cap, the lower end cap, the first valve body, and the second valve body.

[0010] In order to effectively improve the durability of the first valve body and the second valve body;

[0011] As a further improvement to the above technical solution: the inner wall of the connecting ring is fitted with a wear-resistant plate, the wear-resistant plate is a conical ring structure, the material is beryllium bronze, and the inner wall of the wear-resistant plate is parallel to the inner wall of the connecting ring.

[0012] The beneficial effects of the above-mentioned further technical solution are as follows: during the liquid flow process, the wear-resistant plate comes into contact with sand and gravel, and has better wear resistance and corrosion resistance than ordinary steel, which can effectively ensure the sealing of the first valve body and the second valve body.

[0013] In order to effectively ensure the structural strength of the sealing assembly;

[0014] As a further improvement to the above technical solution: the center point of the belt coincides with the center of the float, one end of the belt is welded to the surface of the float, and the other end of the belt is welded to one end of the lower sealing plate and the upper sealing plate. The other ends of the lower sealing plate and the upper sealing plate are respectively welded to the float.

[0015] The beneficial effects of the above-mentioned further technical solution are: the belt, lower sealing plate, and upper sealing plate are subjected to uniform force, which can play a stable supporting role during the movement of the float and impact of the first valve body and the second valve body.

[0016] To effectively ensure the stability of the float's movement;

[0017] As a further improvement to the above technical solution: a counterweight is welded to the lower side of the float. The counterweight has a cylindrical structure and multiple reinforcing ribs are welded to its periphery. The axis of the counterweight is collinear with the axis of the waist belt.

[0018] The beneficial effect of the above-mentioned further technical solution is that the counterweight acts as a counterweight, preventing the float from swinging too much during the rising and falling process.

[0019] To facilitate subsequent maintenance of the float;

[0020] As a further improvement to the above technical solution: a lifting ring is welded to the top of the float facing away from the counterweight.

[0021] The beneficial effect of the above-mentioned further technical solution is that operators can use the lifting rings to hoist the floating ball for maintenance.

[0022] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the first valve body in this utility model;

[0025] Figure 3 This is a cross-sectional view of the float in this utility model;

[0026] Figure 4 This is an enlarged view of A in this utility model;

[0027] In the diagram: 1. Isolation tank; 11. Connecting flange; 12. Sealing gasket; 2. Upper end cap; 3. Lower end cap; 4. First valve body; 41. Flange; 42. Connecting ring; 43. Wear-resistant plate; 5. Second valve body; 6. Float; 61. Counterweight; 62. Lifting ring; 7. Sealing assembly; 71. Belt; 72. Lower sealing plate; 73. Upper sealing plate; 74. Sealing gasket II. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] like Figure 1As shown in Figure 4: A flow control valve for a slurry pump in an isolation tank includes an isolation tank 1. An upper end cap 2 and a lower end cap 3 are respectively connected to the upper and lower ends of the isolation tank 1. A first valve body 4 is bolted to the upper end cap 2 and the isolation tank 1. A second valve body 5 is bolted to the lower end cap 3 and the isolation tank 1. The first valve body 4 and the second valve body 5 have identical structures and are arranged opposite to each other. A float 6 is movably installed inside the isolation tank 1. The first valve body 4 includes a flange 41, and a connecting ring 42 is connected to the inner wall of the flange 41. The inner wall of the connecting ring 42 has a conical surface structure. A sealing assembly 7 is installed in the middle of the float 6. The sealing assembly 7 includes a belt 71, and structurally similar belts are connected to the upper and lower sides of the belt 71. The lower sealing plate 72 and the upper sealing plate 73 are adapted to fit the inner wall of the connecting ring 42. A second sealing gasket 74 is adhered to the lower sealing plate 72 and the upper sealing plate 73. The conical contact surface increases the contact area between the second sealing gasket 74 and the first valve body 4 and the second valve body 5, improving the buffering effect. Furthermore, the conical surface formed by the first valve body 4 and the second valve body 5 fitting the second sealing gasket 74 can guide flow, effectively preventing sand and gravel accumulation on the contact surface between the first valve body 4 and the second valve body 5 and the second sealing gasket 74, thus affecting the sealing effect. Connecting flanges 11 are welded to both ends of the isolation tank 1. Connecting flanges 11 are also welded to the ports of the upper end cap 2 and the lower end cap 3. Adjacent connecting flanges 11 are connected by... A sealing gasket 12 is sandwiched between the connecting flange 11 and the flange 41. The sealing gasket 12 and the flange bolt connection effectively ensure the sealing of the connection between the isolation tank 1, the upper end cap 2, the lower end cap 3, the first valve body 4, and the second valve body 5. The inner wall of the connecting ring 42 is embedded with a wear-resistant plate 43. The wear-resistant plate 43 is a beryllium bronze conical ring structure, and the inner wall of the wear-resistant plate 43 is parallel to the inner wall of the connecting ring 42. During the liquid flow, the wear-resistant plate 43 comes into contact with sand and gravel, and has better wear resistance and corrosion resistance than ordinary steel, which can effectively ensure the sealing of the first valve body 4 and the second valve body 5. The center point of the belt 71 coincides with the center of the float 6. One end of the belt 71 is welded to the surface of the float 6. The other end of the float 6 is welded to one end of the lower sealing plate 72 and the upper sealing plate 73. The other ends of the lower sealing plate 72 and the upper sealing plate 73 are welded to the float 6. The belt 71, the lower sealing plate 72, and the upper sealing plate 73 are evenly stressed, which can provide stable support during the movement of the float 6 and its impact on the first valve body 4 and the second valve body 5. A counterweight 61 is welded to the lower side of the float 6. The counterweight 61 has a cylindrical structure and multiple reinforcing ribs are welded to its circumference. The axis of the counterweight 61 is collinear with the axis of the belt 71.A lifting ring 62 is welded to the top of the float 6, facing away from the counterweight 61, allowing operators to lift the float 6 for maintenance.

[0030] The working principle of this utility model is as follows: As the slurry gradually fills the isolation tank 1, the float 6 rises. The clear water above the float 6 returns to the clear water tank through the return water valve. During the rising process, the counterweight 61 ensures that the float 6 will not swing at a large angle. When the sealing gasket 74 bonded to the surface of the upper sealing plate 73 is in contact with the wear-resistant plate 43 in the first valve body 4, the sealing gasket 74 plays a shock-absorbing and buffering role to prevent rigid collisions from generating large noise. At the same time, the sealing gasket 74 is tightly bonded to the wear-resistant plate 43 to prevent the slurry from entering the clear water area above the float 6 due to excessive pressure after it is filled. When the high-pressure pump sends water into the isolation tank 1 above the float 6, the float 6 moves down under the action of pressure difference to discharge the slurry. When the sealing gasket 74 bonded to the surface of the lower sealing plate 72 is in contact with the wear-resistant plate 43 in the second valve body 5, the sealing gasket 74 plays a shock-absorbing and sealing role to prevent the high-pressure water from entering the slurry area below the float 6 due to excessive pressure after it is filled.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flow control valve for an isolation tank slurry pump, characterized in that: The system includes an isolation tank (1), with an upper end cap (2) and a lower end cap (3) connected to its upper and lower ends respectively. A first valve body (4) is bolted to the upper end cap (2) and the isolation tank (1), and a second valve body (5) is bolted to the lower end cap (3) and the isolation tank (1). The first valve body (4) and the second valve body (5) have the same structure and are arranged opposite to each other. A float (6) is movably installed inside the isolation tank (1). The first valve body (4) includes a flange (41). 1) The inner wall is connected to a connecting ring (42), the inner wall of the connecting ring (42) is a conical surface structure, and a sealing component (7) is installed in the middle of the float (6). The sealing component (7) includes a belt (71). The upper and lower sides of the belt (71) are connected to a lower sealing plate (72) and an upper sealing plate (73) with the same structure. The lower sealing plate (72) and the upper sealing plate (73) are adapted to fit the inner wall of the connecting ring (42). A sealing gasket (74) is adhered to the lower sealing plate (72) and the upper sealing plate (73).

2. The flow control valve for an isolation tank slurry pump according to claim 1, characterized in that: The isolation tank (1) is welded with connecting flanges (11) at both ends. The upper end cap (2) and the lower end cap (3) are both welded with connecting flanges (11). Adjacent connecting flanges (11) and sealing gaskets (12) are sandwiched between the connecting flanges (11) and the flange (41).

3. The flow control valve for an isolation tank slurry pump according to claim 1, characterized in that: The inner wall of the connecting ring (42) is fitted with a wear-resistant plate (43), which is a conical ring structure, and the inner wall of the wear-resistant plate (43) is parallel to the inner wall of the connecting ring (42).

4. The flow control valve for an isolation tank slurry pump according to claim 1, characterized in that: The center point of the belt (71) coincides with the center of the float (6). One end of the belt (71) is welded to the surface of the float (6). The other end of the belt (71) is welded to one end of the lower sealing plate (72) and the upper sealing plate (73). The other ends of the lower sealing plate (72) and the upper sealing plate (73) are respectively welded to the float (6).

5. The flow control valve for an isolation tank slurry pump according to claim 1, characterized in that: The float (6) has a counterweight (61) welded to its lower side. The counterweight (61) has a cylindrical structure and multiple reinforcing ribs are welded to its periphery. The axis of the counterweight (61) is collinear with the axis of the belt (71).

6. The flow control valve for an isolation tank slurry pump according to claim 1, characterized in that: The float (6) has a lifting ring (62) welded to the top of the counterweight (61) facing away from it.

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