Anti-reverse flow filter for electric pump suction pipe

Abstract

The present invention, by attachment to the end of a suction pipe of an electric pump, prevents foreign substances from flowing into water suctioned into a suction pipe, so that the water can be suctioned in easily, and when pumping operation is temporarily stopped, the water that has flowed into the suction pipe path does not flow backward. Thus, when the pumping operation is resumed, the pumping operation can be carried out smoothly. More specifically, a connection pipe having a filtering suction pipe is attached to the end of a suction pipe of the electric pump in order to allow the water to flow in smoothly while preventing inflow of foreign substances, and a partition disk is provided at the boundary between the filtering suction pipe and the connection pipe and a water passage hole is formed in the central portion, and then an opening / closing disk is installed on the water passage hole so that the opening / closing disk is opened due to the water suction force and the water passage hole is opened when pumping is in progress, and the opening / closing disk blocks the water passage hole of the partition disk when pumping is stopped to prevent backflow of the water in the suction pipe path, thereby allowing the pumping operation to be carried out smoothly.

Description

Backflow prevention filter mesh for electric pump suction tube

[0001] The present invention is attached to the suction pipe of an electric pump to prevent foreign substances, such as water plants or debris, from entering the water sucked into the suction pipe, thereby ensuring smooth water suction. Furthermore, to prevent the water in the pumping chamber from decreasing due to backflow towards the suction pipe when the pumping operation is temporarily suspended, a backflow prevention opening / closing plate is installed between the filtration section and the connecting pipe, allowing the pumping operation to resume without replenishing water in the pumping chamber after stopping the operation. More specifically, the invention involves installing a filter mesh with filtration holes attached to the end of the suction pipe of the electric pump to prevent foreign substances, such as water plants or debris, from entering the water flowing into the pumping chamber, thereby ensuring smooth water suction; forming a baffle plate at the boundary between the filtration section and the connecting pipe, forming a water passage hole in the center of the baffle plate, and installing an opening / closing plate at the water passage hole so that during pumping... The opening and closing plate opens the water passage hole with the suction force of the pump, and when pumping is stopped, the restoring force of the coil spring returns the opening and closing plate to block the water passage hole, thereby preventing the water filled in the pumping chamber from flowing back toward the filtration section, so that the pumping chamber is always filled with water, thus enabling safe and convenient pumping.

[0002]

[0003] Since the electric pump is a device that pumps water from a water source and supplies it to a place where water is needed, as illustrated in FIG. 6, a suction port (11) and a discharge port (12) are formed in the pumping chamber (10a) of the electric pump (10), and an impeller (13) is installed in the pumping chamber (10a) and configured to be rotated by an electric motor (14). Then, the impeller is rotated to generate suction force, and water from the water source is sucked into the suction pipe (3) by the suction force of the impeller and discharged through the discharge port (12) installed above the suction port (11) to supply water to a place where water is needed.

[0004] Therefore, a filter screen with filter holes is installed in the suction pipe of the electric pump, and when pumping, the pumping chamber is filled with water and the impeller is rotated to pump.

[0005] However, conventional filter screens attached to the pump suction pipe have poor backflow prevention capabilities, so if a long time passes while the pumping operation is stopped, the water filled in the pumping chamber leaks out toward the suction pipe. Consequently, the water in the pumping chamber is lost and the water volume decreases. If the pump is operated without checking this fact, no suction force is generated in the pumping chamber. If the pump continues to operate in this state, there is a lack of cooling water in the shaft holder where the impeller and the motor rotating shaft are connected, causing overheating. Consequently, the mechanical seal installed on the rotating shaft is damaged, which becomes a cause of pump failure.

[0006]

[0007] The present invention is disclosed to resolve the above inconvenience.

[0008]

[0009] The present invention comprises a filter section (1) which is coupled to the end of the suction pipe (3) of an electric pump (10) and has a filter hole (1a) of a certain size evenly formed on the main wall (1') and the upper surface (1") to prevent foreign substances such as water plants or debris from entering the water sucked into the suction pipe, a central hole (1g) formed in the center of the upper surface so that the bolt head (8') of a spring adjustment bolt (8) protrudes, and a connection section (1c) formed in the opening (1b) so that bolt holes (1d) are formed at regular intervals.

[0010] The connecting pipe (2) is formed such that a connecting part (2a) is formed in a tubular shape with a bolt hole (2a') formed on the outer circumference of the inlet (2'), and a connecting part (1c) formed in the opening (1b) of the filter part (1) is fastened with a bolt (1e) and a nut (1f), and a connecting part (2b) is formed to which the suction pipe (3) of the electric pump (10) is connected to the discharge part (2") formed on the opposite side of the inlet (2').

[0011] A plate (4) made of synthetic resin and interposed between the connection part of the filter section (1) and the connection part of the connecting pipe (2), with a connection part (4b) formed on the outer circumference and a bolt hole (4b') formed in the connection part, and a water passage hole (4a) formed in the center, with upward support members (4c) protruding upward at equal intervals on the outer circumference of the water passage hole, so that the upper end of the upward support members is connected to the center plate (4d), and a screw hole (4e) formed in the center of the center plate so that a spring adjustment bolt (8) is coupled thereto, and

[0012] A connecting part (5b) is formed on the outer circumference of a rubber plate and is interposed between the connecting part of the diaphragm (4) and the connecting part of the connecting pipe (2), and a bolt hole (5b') is formed in the connecting part.

[0013] A through hole (5a) with a diameter larger than the water passage hole (4a) of the diaphragm (4) is formed in the central part, and a rubber disc (5c) with a diameter smaller than the through hole (5a) and larger than the water passage hole (4a) of the diaphragm (4) is placed in the center of the through hole, and one side of the outer surface of the rubber disc is connected to the inner surface of the connection part (5b) and the connecting piece (5d) so as to be in close contact with the inner surface of the water passage hole (4a) of the diaphragm (4), and the water passage hole (4a) of the diaphragm (4) is opened and closed by a movement of separation, and a bolt through hole (7a) is formed in the center of the rubber disc.

[0014] A metal disc (5e) having a diameter smaller than the water passage hole (4a) of the diaphragm (4) is disposed on the surface of the filter portion (1) of the rubber disc (5c), and a female screw hole (5e') is formed in the center of the metal disc, and a closing plate (5).

[0015] A male screw (6a) is fixed in a screw connection to a female screw hole (5e') in the center of a metal plate (5e) of a closing plate (5), a countersunk bolt head (6b) is formed on the upper end of the male screw, and a center bolt (6) has a screwdriver groove (6c) formed in the center, and

[0016] A housing (7) made of a synthetic resin cylinder having a bolt through hole (7a) formed in the center, a dish-shaped groove (7b) formed on the outer circumference of the upper part of the bolt through hole with a spreading upper end to receive the dish-shaped bolt head (6b) of the central bolt (6), and upward coupling protrusions (7c) (7d) formed on both sides of the bolt head receiving groove, protruding laterally at a right angle from the upper part of the coupling protrusion, and a locking protrusion (7e) (7f) formed with the upper surface of the protrusion being an inclined surface (7e') (7f').

[0017] A spring connector (70) is formed by a cover body (71) that is made of a synthetic resin cylinder and is forcibly connected to the upper part of the housing (7), has a recessed groove (71a) formed in the center of the bottom surface facing a bolt head receiving groove, has connecting protrusion connecting grooves (71b) (71c) formed on both sides of the recessed groove, has connecting protrusion connecting holes (71d) (71e) formed on the outer walls (71b') (71c') of the connecting protrusion connecting grooves, and has a protruding rod (71f) formed in the center of the upper surface to form a spring connecting hole (71g), and is connected to the housing and the cover body so as to receive the countersunk bolt head (6b) of the center bolt (6).

[0018] A rubber disc reinforcing plate (5f) that is placed on the opposite side of the metal disc (5e) on the filtering side of the rubber disc (5c) to support the rubber disc (5c), and a male screw (6a) of a center bolt (6) passes through the center hole (5f'), and a brass washer (5g) is inserted into the outer surface of the center hole (5f') through which the center bolt passes, and a cap nut (5h) is screwed in, thereby adhering to the rubber disc (5c), and

[0019] A spring adjustment bolt (8) that is screw-coupled to the screw hole (4e) of the center plate (4d) of the upward support (4c) of the diaphragm (4), and has a protrusion (8b) formed at the bottom of the male screw portion (8a) to form a spring connection hole (8c), and

[0020] The invention relates to a backflow prevention filter screen for an electric pump suction pipe, comprising a coil spring (9) that is connected to the spring connecting hole (8c) of a spring adjusting bolt (8) and the spring connecting hole (71g) of a spring connecting member (70) to provide return elasticity to the opening / closing plate (5).

[0021]

[0022] The present invention, as described above, comprises a filtration section (1) forming a filter mesh (ga) and a connecting pipe (2) with a partition plate (4) interposed between them, and a rubber plate opening / closing plate (5) installed in a water passage hole (4a) formed in the center thereof. When the suction force of an electric pump is activated, the rubber disc (5c) of the opening / closing plate receives the pump suction force and opens the water passage hole (4a) of the partition plate (4). When the pump is not operating, the rubber disc (5c) moves toward the water passage hole (4a) of the partition plate (4) by the return elasticity of a coil spring (9) installed between a spring adjustment bolt (8) installed in the screw hole (4e) of the center plate of the upward support of the partition plate (4) and a spring connector (70) installed in the center of the metal disc (5e) of the rubber disc (5c), thereby blocking the water passage hole of the partition plate and preventing backflow of water contained in the suction pipe and pump room toward the filtration section. Therefore, even if the pump operation is stopped, the water contained in the pump room does not flow back toward the filtration section. Since there is no leakage, the water remains in the water supply pipe and pump room, and as a result, there is no need to refill the pump room with water when pumping is resumed, which has the advantage of allowing pumping operations to continue. This also prevents pump failure by operating the pump without knowing that the water in the pump room has decreased due to leakage, thereby allowing the pump's lifespan to be maintained durably.

[0023] Additionally, since the rubber disc (5c) is positioned at the center of the opening / closing plate (5) and connected to the connection part on the outer circumference of the opening / closing plate by the rubber connecting piece (5d), when the rubber disc (5c) opens and closes, the rubber connecting piece (5d) acts as a hinge to open and close the water passage hole (4a) of the diaphragm. By connecting one side of the rubber disc with the connecting piece, the rubber disc opens and closes in a swinging manner, thereby opening the water passage hole wide when open and increasing the amount of water flowing into the suction pipe. Furthermore, since the inner hook of the coil spring (9) is connected to the spring connecting part (70) and the outer hook is connected to the connecting hole formed at the end of the male thread of the spring adjustment bolt (8), the elasticity of the coil spring is reduced when the adjustment bolt is rotated inward and increased when it is rotated outward. Thus, the elasticity of the rubber disc, which opens due to the suction force of the pump and closes when the pump is not operating, can be adjusted. Therefore, there is an advantage in being able to construct a rubber disc (5c) in which the opening and closing force is maintained appropriately and accurately, and

[0024] In particular, the spring connecting part (70) is composed of a housing (7) and a cover body (71) and is coupled to the countersunk bolt head (6b) of the center bolt (6) between the housing and the cover body. Since the spring connecting part rotates at the countersunk bolt head of the center bolt, the elasticity transmitted to the opening and closing plate is smooth, which is an advantage.

[0025] The diaphragm (4) forms an upward support (4c) on the outer circumference of the central water passage hole and connects its upper end to the center plate to form a triangular structure, and a screw hole (4e) is formed in the center of the center plate (4d) to install a spring adjustment bolt (8). Since the head of the spring adjustment bolt protrudes from the center of the diaphragm to the center hole (1g) on ​​the upper surface of the inlet pipe, the installation and operation of the spring adjustment bolt are convenient, and since the upward support forms a triangular structure, the advantage of not significantly obstructing the flow of the sucked water can be obtained.

[0026]

[0027] FIG. 1 is an external perspective view of the present invention.

[0028] FIG. 2 is an exploded perspective view of FIG. 1.

[0029] FIG. 3 is a partially exploded perspective view of the spring connector of the present invention.

[0030] FIG. 4 is a partially fractured perspective view of the assembled state of the spring connector of the present invention.

[0031] FIG. 5 is a cross-sectional view of FIG. 1.

[0032] FIG. 6 is an example diagram of the operating state of FIG. 5.

[0033] FIG. 7 is an example of the usage state of the present invention.

[0034]

[0035] The present invention comprises a filter section (1) which is coupled to the end of the suction pipe (3) of an electric pump (10) and has a filter hole (1a) of a certain size evenly formed on the main wall (1') and the upper surface (1") to prevent foreign substances such as water plants or debris from entering the water sucked into the suction pipe, a central hole (1g) formed in the center of the upper surface so that the bolt head (8') of a spring adjustment bolt (8) protrudes, and a connection section (1c) formed in the opening (1b) so that bolt holes (1d) are formed at regular intervals.

[0036] The connecting pipe (2) is formed such that a connecting part (2a) is formed in a tubular shape with a bolt hole (2a') formed on the outer circumference of the inlet (2'), and a connecting part (1c) formed in the opening (1b) of the filter part (1) is fastened with a bolt (1e) and a nut (1f), and a connecting part (2b) is formed to which the suction pipe (3) of the electric pump (10) is connected to the discharge part (2") formed on the opposite side of the inlet (2').

[0037] A plate (4) made of synthetic resin and interposed between the connection part of the filter section (1) and the connection part of the connecting pipe (2), with a connection part (4b) formed on the outer circumference and a bolt hole (4b') formed in the connection part, a water passage hole (4a) formed in the center and upward support members (4c) protruding upward at equal intervals on the outer circumference of the water passage hole, so that the upper ends of the upward support members are gathered and connected to the center plate (4d), and a screw hole (4e) formed in the center of the center plate to which a spring adjustment bolt (8) is coupled, and

[0038] A connecting part (5b) is formed on the outer circumference of a rubber plate and is interposed between the connecting part of the diaphragm (4) and the connecting part of the connecting pipe (2), and a bolt hole (5b') is formed in the connecting part.

[0039] A through hole (5a) with a diameter larger than the water passage hole (4a) of the diaphragm (4) is formed in the central part, and a rubber disc (5c) with a diameter smaller than the through hole (5a) and larger than the water passage hole (4a) of the diaphragm (4) is placed in the center of the through hole, and one side of the outer surface of the rubber disc is connected to the inner surface of the connection part (5b) and the connecting piece (5d) so as to be in close contact with the inner surface of the water passage hole (4a) of the diaphragm (4), and the water passage hole (4a) of the diaphragm (4) is opened and closed by a movement of separation, and a bolt through hole (7a) is formed in the center of the rubber disc.

[0040] A metal disc (5e) with a diameter smaller than the water passage hole (4a) of the diaphragm (4) is placed on the surface of the filter portion (1) of the rubber disc (5c), and a female screw hole (5e') is formed in the center of the metal disc.

[0041] A male screw (6a) is screwed into and fixed to a female screw hole (5e') in the center of a metal disc (5e), ​​and a center bolt (6) is provided with a countersunk bolt head (6b) formed on the top of the male screw and a screwdriver groove (6c) formed in the center.

[0042] A housing (7) made of a synthetic resin cylinder having a bolt through hole (7a) formed in the center, a dish-shaped groove (7b) formed on the outer circumference of the upper part of the bolt through hole with an upper portion that expands to form a bolt head receiving groove that receives the dish-shaped bolt head (6b) of the center bolt (6), upward coupling protrusions (7c) (7d) formed on both sides of the bolt head receiving groove that protrude laterally at a right angle from the upper part of the coupling protrusions, and a locking protrusion (7e) (7f) formed on the upper surface of the protrusions having an inclined surface (7e') (7f') formed thereon to be coupled to the dish-shaped bolt head (6b) of the center bolt, and

[0043] A spring connector (70) is formed by a cover body (71) that is made of a synthetic resin cylinder and is forcibly connected to the upper part of the housing (7), has a recessed groove (71a) formed in the center of the bottom surface facing a bolt head receiving groove, has connecting protrusion connecting grooves (71b) (71c) formed on both sides of the recessed groove, has connecting protrusion connecting holes (71d) (71e) formed on the outer walls (71b') (71c') of the connecting protrusion connecting grooves, and has a protruding rod (71f) formed in the center of the upper surface to form a spring connecting hole (71g), and the countersunk bolt head (6b) of the center bolt (6) is received between the housing and the cover body and is connected to rotate at the countersunk bolt head (6b) of the center bolt.

[0044] An opening / closing plate (5) made of a metal plate and positioned on the opposite side of the metal plate (5e) on the filtering side of the rubber plate (5c) to support the rubber plate (5c), and a male screw (6a) of a center bolt (6) passes through the center hole (5f'), and a brass washer (5g) is inserted into the outer surface of the center hole (5f') through which the center bolt passes, and a cap nut (5h) is screwed in so as to make it adhere to the rubber plate (5c), and a rubber plate reinforcing plate (5f) is formed.

[0045] A spring adjustment bolt (8) that is screw-coupled to the screw hole (4e) of the center plate (4d) of the upward support (4c) of the diaphragm (4), and has a protrusion (8b) formed at the bottom of the male screw portion (8a) to form a spring connection hole (8c), and

[0046] The invention relates to a backflow prevention filter screen for an electric pump suction pipe, comprising a coil spring (9) that is connected to the spring connecting hole (8c) of a spring adjusting bolt (8) and the spring connecting hole (71g) of a spring connecting member (70) to provide return elasticity to the opening / closing plate (5).

[0047] [Explanation of the symbol]

[0048] 1 : Filter section

[0049] 1' : Main wall

[0050] 1" : Top surface

[0051] 1a : Filter hole

[0052] 1b : Opening

[0053] 1c : Connection part

[0054] 1d, 2a', 4b', 5b' : Bolt holes

[0055] 1e : bolt

[0056] 1f : Nut

[0057] 1g : central hole

[0058] 2 : Connector

[0059] 2a : Connection part

[0060] 2' : Entrance

[0061] 2" : Discharge section

[0062] 2b : Connection part

[0063] 3: Absorption tube

[0064] 4 : Plate

[0065] 4a : Water passage hole

[0066] 4b : Connection part

[0067] 4c: Upward support

[0068] 4d : Center plate

[0069] 4e : Screw hole

[0070] 5 : Opening / closing plate

[0071] 5a : through hole

[0072] 5b : Connection part

[0073] 5c : Rubber plate

[0074] 5d : Connecting piece

[0075] 5e : Metal disc

[0076] 5e' : Female screw hole

[0077] 5f : Rubber disc reinforcement plate

[0078] 5f' : Center hole

[0079] 5g: Brass washer

[0080] 5h : Cap nut

[0081] 6 : Center bolt

[0082] 6a : Male screw

[0083] 6b : Countersunk bolt head

[0084] 6c : Driver home

[0085] 7 : Hull

[0086] 7a: Bolt through hole

[0087] 7b : Dish-shaped groove

[0088] 7c, 7d : Upward connecting projection

[0089] 7e,7f : Stopping projection

[0090] 7e',7f' : Slope

[0091] 8 : Spring adjustment bolt

[0092] 8' : Bolt head

[0093] 8a : Male screw part

[0094] 8b : Protrusion

[0095] 8c : Spring connection hole

[0096] 9 : Coil spring

[0097] 10 : Electric pump

[0098] 10a : Pumping room

[0099] 11: Intake port

[0100] 12: Discharge port

[0101] 13 : Impeller

[0102] 14 : Electric motor

[0103] 70 : Spring connector

[0104] 71 : Cover body

[0105] 71a : Recess

[0106] 71b, 71c: Connecting grooves

[0107] 71b',71c' : outer wall

[0108] 71d,71e : Joint hole

[0109] 71g : Spring connection hole

Claims

1. A filter section (1) that is coupled to the end of the suction pipe (3) of an electric pump (10) and has a filter hole (1a) of a certain size evenly formed on the main wall (1') and the upper surface (1") to prevent foreign substances such as water plants or debris from entering the water sucked into the suction pipe, a central hole (1g) formed in the center of the upper surface so that the bolt head (8') of the spring adjustment bolt (8) protrudes, and a connection part (1c) formed in the opening (1b) so that bolt holes (1d) are formed at regular intervals, and The connecting pipe (2) is formed such that a connecting part (2a) is formed in a tubular shape with a bolt hole (2a') formed on the outer circumference of the inlet (2'), and a connecting part (1c) formed in the opening (1b) of the filter part (1) is fastened with a bolt (1e) and a nut (1f), and a connecting part (2b) is formed to which the suction pipe (3) of the electric pump (10) is connected to the discharge part (2") formed on the opposite side of the inlet (2'). A plate (4) made of synthetic resin and interposed between the connection part of the filter section (1) and the connection part of the connecting pipe (2), with a connection part (4b) formed on the outer circumference and a bolt hole (4b') formed in the connection part, and a water passage hole (4a) formed in the center, with upward support members (4c) protruding upward at equal intervals on the outer circumference of the water passage hole, so that the upper ends of the upward support members are gathered and connected to the center plate (4d), and a screw hole (4e) formed in the center of the center plate so that a spring adjustment bolt (8) is coupled thereto, and A connecting part (5b) is formed on the outer circumference of a rubber plate and is interposed between the connecting part of the diaphragm (4) and the connecting part of the connecting pipe (2), and a bolt hole (5b') is formed in the connecting part. A through hole (5a) with a diameter larger than the water passage hole (4a) of the diaphragm (4) is formed in the central part, and a rubber disc (5c) with a diameter smaller than the through hole (5a) and larger than the water passage hole (4a) of the diaphragm (4) is placed in the center of the through hole, and one side of the outer surface of the rubber disc is connected to the inner surface of the connection part (5b) and the connecting piece (5d), so that the rubber disc (5c) is in close contact with the inner surface of the diaphragm and the water passage hole (4a) of the diaphragm (4) is opened and closed by the movement of separating, and a bolt through hole (7a) is formed in the center of the rubber disc. A metal disc (5e) with a diameter smaller than the water passage hole (4a) of the diaphragm (4) is placed on the surface of the filter portion (1) of the rubber disc (5c), and a female screw hole (5e') is formed in the center of the metal disc. A metal disc is positioned on the opposite side of the metal disc (5e) of the rubber disc (5c) to support the rubber disc (5c), and a rubber disc reinforcing plate (5f) with a center hole (5f') formed in the center is positioned to connect the metal disc (5e) and the rubber disc reinforcing plate (5f) with a center bolt (6). A brass washer (5g) is inserted into the protruding part of the center bolt, and a cap nut (5h) is screwed into the opening / closing plate (5), and A center bolt (6) that is screw-coupled to the female screw hole (5e') in the center of the metal plate (5e) of the opening / closing plate (5), has a countersunk bolt head (6b) formed on the upper end and a screwdriver groove (6c) formed in the center, and A housing (7) made of a synthetic resin cylinder having a bolt through hole (7a) formed in the center, a dish-shaped groove (7b) formed on the outer circumference of the upper part of the bolt through hole with an expanded upper end to receive the dish-shaped bolt head (6b) of the center bolt (6), upward coupling protrusions (7c) (7d) formed on both sides of the bolt head receiving groove, protruding laterally at a right angle from the upper part of the coupling protrusion, and a locking protrusion (7e) (7f) formed on the upper surface of the protrusion with an inclined surface (7e') (7f') formed to receive the dish-shaped bolt head (6b) of the center bolt (6), and a housing (7) to which the dish-shaped bolt head (6b) of the center bolt (6) is coupled. A spring connector (70) is formed by a cover body (71) that is made of a synthetic resin cylinder and is forcibly connected to the upper part of the housing (7), has a recessed groove (71a) formed in the center of the bottom surface facing a bolt head receiving groove, has connecting protrusion connecting grooves (71b) (71c) formed on both sides of the recessed groove, has connecting protrusion connecting holes (71d) (71e) formed on the outer walls (71b') (71c') of the connecting protrusion connecting grooves, and has a protruding rod (71f) formed in the center of the upper surface to form a spring connecting hole (71g), and the countersunk bolt head (6b) of the center bolt (6) is received between the housing and the cover body and is connected to rotate at the countersunk bolt head (6b) of the center bolt. A spring adjustment bolt (8) that is screw-coupled to the screw hole (4e) of the center plate (4d) of the upward support (4c) of the diaphragm (4), and has a protrusion (8b) formed at the bottom of the male screw portion (8a) to form a spring connection hole (8c), and A backflow prevention filter screen for an electric pump suction tube, comprising a coil spring (9) that is connected to the spring connection hole (8c) of the spring adjustment bolt (8) and the spring connection hole (71g) of the spring connection member (70) to provide return elasticity to the opening / closing plate (5).

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