A motor short circuit fault detection device

Abstract

The present invention belongs to the technical field of motor short-circuit detection, and specifically discloses a motor short-circuit fault detection device, including a short-circuit detector body and a connecting mechanism, wherein a connecting plate is embedded and installed on one side of the short-circuit detector body, and the surface of the connecting plate is provided with two symmetrically distributed through holes, and the output end and the input end of the short-circuit detector body are respectively located inside the two through holes; by setting the connecting mechanism, the stability of the electric clamp during use can be guaranteed, and the situation of falling off due to vibration can be avoided. By injecting liquid into the adjustment cavity, the sliding plate can be pushed to slide along the inner wall of the adjustment cavity. In this process, the limit rod can be driven to insert into the interior of the limit groove, thereby realizing the limitation between the connecting shaft and the connecting shell, and then realizing the limitation between the two clamps, so as to prevent the possibility of the clamp falling off due to vibration and improve the detection accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of motor short circuit detection, and specifically discloses a motor short circuit fault detection device. Background Art

[0002] In large motors, the motor winding conductors are wound from multiple electromagnetic wires (i.e., strands) covered with an insulation layer. The conductors must be insulated from each other within a certain length range to ensure the motor windings meet operational requirements. During operation, the motor windings are susceptible to factors such as starting inrush current, harmonic currents, external shocks, rainwater corrosion, insulation damage, and contaminant intrusion, potentially causing faults such as short circuits, open circuits, or grounding.

[0003] Existing short-circuit fault detection equipment mainly uses the current after the motor winding is short-circuited to determine whether the motor winding has a short circuit and determine the location of the short circuit. During use, the motor winding is clamped and energized by an electric clamp. However, large motors are usually used in a combination of multiple groups of motors, and a rotation maintenance method is often adopted, that is, the motors other than those under maintenance are still guaranteed to be used normally. This will cause vibration during the maintenance process, which may easily cause the electric clamp to fall off and affect the detection effect. Therefore, technical personnel in this field have proposed a motor short-circuit fault detection device to solve the above-mentioned problems. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is to propose a motor short circuit fault detection device to solve the problem that vibration occurs during the maintenance process of the existing technology, which easily causes the electric clamp to fall off and affects the detection effect.

[0005] To achieve the above objectives, the present invention provides a motor short-circuit fault detection device, comprising a short-circuit detector body and a connecting mechanism. A connecting plate is embedded in one side of the short-circuit detector body, and a surface of the connecting plate is provided with two symmetrically distributed through holes. The output and input ends of the short-circuit detector body are respectively located within the two through holes. One end of the connecting mechanism can be connected to the output and input ends of the short-circuit detector body, and the other end of the connecting mechanism can be connected to the motor to be tested.

[0006] The connecting mechanism includes a clamping assembly and a protective assembly, wherein the clamping assembly is used to quickly connect to the detection end of the motor to be tested, and the protective assembly is used to improve the stability of the clamping assembly;

[0007] The clamping assembly includes a connecting wire, one end of which is provided with a connector that matches the output and input ends of the short-circuit detector body, the other end of which is fixedly connected to an electrical clamp, and a connecting tube fixedly connected to the surface of the connecting wire, wherein a guide channel is provided inside the connecting tube;

[0008] The electric clamp is composed of two clamping plates, wherein a rotating shaft is fixedly connected to the surface of one clamping plate, and a connecting shell is fixedly connected to the surface of the other clamping plate;

[0009] The top of the rotating shaft is fixedly connected to a connecting shaft rotatably connected to the inner wall of the connecting shell, the surface of the connecting shaft is provided with annular limiting grooves, an adjustment cavity is provided inside the connecting shell, a sliding plate is slidably connected to the inner wall of the adjustment cavity, a limiting rod matching the limiting groove is fixedly connected to the side of the sliding plate close to the connecting shaft, and a third spring is fixedly connected between the other side of the sliding plate and the inner wall of the adjustment cavity;

[0010] A conduit communicating with the regulating cavity is provided on the surface of the connecting shell, and the other end of the conduit is communicated with the diversion channel.

[0011] In the above technical solution, preferably, the other end of the rotating shaft passes through the other splint and is rotatably connected to the inner wall of the connecting shell, and a clockwork spring is fixedly connected between the surface of the rotating shaft and the inner wall of the connecting shell.

[0012] In the above technical solution, preferably, the protective component includes a mounting sleeve fixedly connected to the surface of the connecting wire, the surface of the mounting sleeve is fixedly connected to a connecting sleeve, a sliding groove is provided on the side of the connecting sleeve away from the electrical clamp, a sliding cavity is provided inside the connecting sleeve, a slot connected to the sliding cavity is provided on the side of the connecting sleeve away from the electrical clamp, the slot is connected to the sliding groove, and the inner diameter of the slot is larger than the inner diameter of the slot.

[0013] In the above technical solution, preferably, the protective component also includes two connecting rods fixedly connected to the surface of the connecting plate and respectively located above the two through holes, and the other end of the connecting rod is fixedly connected with an integrally formed locking block, the cross-sectional shape of the locking block is a right-angled trapezoid, and the height of the locking block is equal to the inner diameter of the slot, and the height of the connecting rod is equal to the inner diameter of the slot.

[0014] In the above technical solution, preferably, the inner wall of the sliding cavity is slidably connected to a mounting block, the bottom of the mounting block is provided with a mounting groove matching the locking block, the inner wall of the mounting groove is slidably connected to a baffle, the inner wall of the mounting block is slidably connected to a slide, a second spring is fixedly connected between the top of the slide and the inner wall of the mounting block, the upper end of the baffle passes through the mounting block and is fixedly connected to the bottom of the slide, the top of the slide is fixedly connected to a mounting rod, the upper end of the mounting rod passes through a connecting sleeve and is fixedly connected to a pull plate.

[0015] In the above technical solution, preferably, a liquid storage cavity is opened inside the connecting sleeve, and an extrusion block is slidably connected to the inner wall of the liquid storage cavity, an adjusting rod is fixedly connected to one side of the extrusion block, and the other end of the adjusting rod passes through the liquid storage cavity and is fixedly connected to the surface of the mounting block, a first spring is fixedly connected between the other side of the extrusion block and the inner wall of the liquid storage cavity, and the interior of the liquid storage cavity is filled with hydraulic oil.

[0016] In the above technical solution, preferably, a connecting channel connected to the guide channel is opened inside the installation sleeve, a drainage channel connected to the liquid storage chamber is opened inside the installation sleeve, and the connecting channel is connected to the liquid storage chamber through the drainage channel.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. By setting up a connecting mechanism, the stability of the electric clamp during use can be guaranteed to avoid falling off due to vibration. By injecting liquid into the adjusting cavity, the sliding plate can be pushed along the inner wall of the adjusting cavity. In this process, the limit rod can be driven to insert into the inside of the limit groove to achieve the limit between the connecting shaft and the connecting shell, and then achieve the limit between the two splints, so as to prevent the possibility of the splint falling off due to vibration and improve the detection accuracy.

[0019] 2. During the connection of the connecting wire, the locking block can be inserted into the sliding cavity through the slot, and the connecting sleeve can be turned to drive the connecting rod to slide along the inner wall of the slide groove. At this time, the locking block is misaligned with the slot, thereby limiting the separation of the connecting sleeve and the locking block, ensuring the stability of the connector connection during the test. At the same time, the position of the mounting block can be rotated to further limit the position of the locking block, further ensuring the stability of the connector connection, avoiding the possibility of reverse loosening caused by vibration, and reducing the situation where the connector becomes loose or falls off due to vibration and affects the detection effect.

[0020] 3. During the process of rotating the pull plate, the synchronous rotation of the mounting block can drive the adjusting rod to be inserted into the liquid storage chamber, thereby driving the extrusion block to squeeze the hydraulic oil stored in the liquid storage chamber, so that the hydraulic oil is introduced into the interior of the diversion channel through the drainage channel and the connecting channel, and then can be injected into the interior of the adjusting chamber through the catheter to achieve the limitation of the electric clamp. It has strong synchronization and does not require separate operation, which effectively improves the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 Schematic diagram of the separation of the connecting mechanism and the short-circuit detector body of the present invention;

[0023] Figure 3 Schematic diagram of the distribution of connecting rods of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of middle A;

[0025] Figure 5 Schematic diagram of the distribution of slots and chutes of the present invention;

[0026] Figure 6 is a cross-sectional schematic diagram of the connecting sleeve of the present invention;

[0027] Figure 7 This is a schematic diagram of the connection between the mounting block and the pull plate of the present invention;

[0028] Figure 8 Schematic diagram of the distribution of the guide channel, connecting channel and drainage channel of the present invention;

[0029] Figure 9 This is a schematic diagram of the connection of the connecting pipe, the conduit and the electrical clamp of the present invention;

[0030] Figure 10 for Figure 9 Magnified view of B.

[0031] Figure: 1. Short-circuit detector body; 101. Connecting plate; 102. Connecting rod; 103. Locking block; 2. Connecting mechanism; 201. Connecting sleeve; 202. Mounting sleeve; 203. Connecting wire; 204. Slide; 205. Pull plate; 206. Slot; 207. Adjusting rod; 208. Mounting block; 209. First spring; 210. Extrusion block; 211. Second spring; 212. Mounting rod; 213. Baffle ; 214, slide plate; 215, liquid storage chamber; 216, connecting tube; 217, guide channel; 218, connecting channel; 219, drainage channel; 220, electric clamp; 221, catheter; 222, connecting shell; 223, spring; 224, rotating shaft; 225, sliding plate; 226, third spring; 227, adjusting chamber; 228, limiting rod; 229, connecting shaft; 230, limiting groove; 231, sliding chamber. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] like Figures 1-10The motor short-circuit fault detection device shown includes a short-circuit detector body 1 and a connecting mechanism 2. A connecting plate 101 is embedded in one side of the short-circuit detector body 1. The surface of the connecting plate 101 is provided with two symmetrically distributed through holes, and the output and input ends of the short-circuit detector body 1 are respectively located within the two through holes. One end of the connecting mechanism 2 can be connected to the output and input ends of the short-circuit detector body 1, and the other end of the connecting mechanism 2 can be connected to the motor to be tested.

[0035] The connecting mechanism 2 includes a clamping assembly and a protective assembly. The clamping assembly is used to quickly connect to the detection end of the motor to be tested, and the protective assembly is used to improve the stability of the clamping assembly.

[0036] like Figures 1-10 As shown, the clamping assembly includes a connecting wire 203, one end of the connecting wire 203 is provided with a connector that matches the output end and input end of the short-circuit detector body 1, the other end of the connecting wire 203 is fixedly connected to an electrical clamp 220, and the surface of the connecting wire 203 is fixedly connected to a connecting tube 216, and a guide channel 217 is opened inside the connecting tube 216.

[0037] The electric clamp 220 consists of two clamps, one of which is fixedly connected to a rotating shaft 224 on its surface, and the other is fixedly connected to a connecting shell 222 on its surface. The other end of the rotating shaft 224 passes through the other clamp and is rotatably connected to the inner wall of the connecting shell 222. A spring 223 is fixedly connected between the surface of the rotating shaft 224 and the inner wall of the connecting shell 222.

[0038] The top of the rotating shaft 224 is fixedly connected to a connecting shaft 229 that is rotatably connected to the inner wall of the connecting shell 222. The surface of the connecting shaft 229 is provided with an annular limiting groove 230. The interior of the connecting shell 222 is provided with an adjusting cavity 227. The inner wall of the adjusting cavity 227 is slidably connected to a sliding plate 225. The side of the sliding plate 225 close to the connecting shaft 229 is fixedly connected to a limiting rod 228 that matches the limiting groove 230. The other side of the sliding plate 225 is fixedly connected to the inner wall of the adjusting cavity 227 with a third spring 226.

[0039] A conduit 221 communicating with the regulating cavity 227 is provided on the surface of the connecting shell 222 , and the other end of the conduit 221 is communicated with the guide channel 217 .

[0040] The electrical clamp 220 can be quickly connected to the connection end of the motor to be tested, and the connector on the connecting line 203 is connected to the output end and input end of the short-circuit detector body 1, so that the motor to be tested can be tested through the short-circuit detector body 1;

[0041] The short-circuit detector body 1 uses the current after the motor winding is short-circuited to determine whether the motor winding is short-circuited and to determine the location of the short circuit.

[0042] The existing electric clamp 220 is mainly used to press the two clamps to rotate around the rotating shaft 224 during use, so that the two clamps can be moved away from each other, so as to adapt to the clamping of different positions. In this process, the connecting shell 222 and the rotating shaft 224 make opposite circular motions, thereby tightening the spring 223, that is, after the clamp is loosened, the two clamps can be driven to reset under the action of the spring 223 to achieve the purpose of clamping. However, during the detection process, the vibration of the surrounding environment can easily cause the clamp to fall off, and the clamping effect generated by the clamping force generated by the spring 223 alone is poor. Therefore, by injecting liquid into the adjustment cavity 227, the sliding plate 225 can be pushed to slide along the inner wall of the adjustment cavity 227. In this process, the limiting rod 228 can be driven to insert into the interior of the limiting groove 230, thereby achieving the limitation between the connecting shaft 229 and the connecting shell 222, and then achieving the limitation between the two clamps, so as to prevent the possibility of the clamp falling off caused by vibration, thereby improving the detection accuracy. Figure 9-10 The figure shows the state when liquid is injected into the regulating chamber 227 . At this time, the third spring 226 is in a stretched state. Under normal conditions, the third spring 226 can mobilize the sliding plate 225 to shrink the limiting rod 228 inside the regulating chamber 227 .

[0043] like Figures 1-10 As shown, the protective component includes a mounting sleeve 202 fixedly connected to the surface of the connecting wire 203, a connecting sleeve 201 is fixedly connected to the surface of the mounting sleeve 202, a sliding groove 204 is provided on the side of the connecting sleeve 201 away from the electrical clamp 220, a sliding cavity 231 is provided inside the connecting sleeve 201, a slot 206 connected to the sliding cavity 231 is provided on the side of the connecting sleeve 201 away from the electrical clamp 220, the slot 206 is connected to the sliding groove 204, and the inner diameter of the slot 206 is larger than the inner diameter of the slot 204.

[0044] The protective component also includes two connecting rods 102 fixedly connected to the surface of the connecting plate 101 and respectively located above the two through holes. The other end of the connecting rod 102 is fixedly connected to an integrally formed locking block 103. The cross-sectional shape of the locking block 103 is a right-angled trapezoid, and the height of the locking block 103 is equal to the inner diameter of the slot 206. The height of the connecting rod 102 is equal to the inner diameter of the slot 204.

[0045] The inner wall of the sliding cavity 231 is slidably connected to the mounting block 208, and the bottom of the mounting block 208 is provided with a mounting groove matching the locking block 103. The inner wall of the mounting groove is slidably connected to the baffle 213, and the inner wall of the mounting block 208 is slidably connected to the slide plate 214. A second spring 211 is fixedly connected between the top of the slide plate 214 and the inner wall of the mounting block 208. The upper end of the baffle 213 passes through the mounting block 208 and is fixedly connected to the bottom of the slide plate 214. The top of the slide plate 214 is fixedly connected to the mounting rod 212. The upper end of the mounting rod 212 passes through the connecting sleeve 201 and is fixedly connected to the pull plate 205.

[0046] During the process of connecting the connector to the output and input terminals of the short-circuit detector body 1, the locking block 103 can be inserted into the sliding cavity 231 through the slot 206, and the connecting sleeve 201 can be rotated to drive the connecting rod 102 to slide along the inner wall of the slide groove 204. At this time, the locking block 103 is misaligned with the slot 206, thereby preventing the connecting sleeve 201 from separating from the locking block 103, ensuring the stability of the connector connection during the test and preventing the possibility of falling off.

[0047] The position of the mounting block 208 is adjusted by rotating the pull plate 205. During this process, the locking block 103 can be driven to pass through the mounting slot and use its inclined surface to squeeze the baffle 213 upward while compressing the second spring 211. After the locking block 103 passes through the baffle 213, the baffle 213 can be driven to reset under the action of the second spring 211. At this time, the reversal connection sleeve 201 cannot be reversed because the baffle 213 blocks the right-angled edge of the locking block 103, further ensuring the stability of the connection of the connector, avoiding the possibility of reversal loosening caused by vibration, and reducing the situation where the connector is loosened or falls off due to vibration and affects the detection effect.

[0048] like Figures 1-10 As shown, a liquid storage chamber 215 is provided inside the connecting sleeve 201, and an extrusion block 210 is slidably connected to the inner wall of the liquid storage chamber 215. An adjusting rod 207 is fixedly connected to one side of the extrusion block 210, and the other end of the adjusting rod 207 passes through the liquid storage chamber 215 and is fixedly connected to the surface of the mounting block 208. A first spring 209 is fixedly connected between the other side of the extrusion block 210 and the inner wall of the liquid storage chamber 215, and the interior of the liquid storage chamber 215 is filled with hydraulic oil.

[0049] A connecting channel 218 communicating with the guide channel 217 is provided inside the installation sleeve 202 . A drainage channel 219 communicating with the liquid storage chamber 215 is provided inside the installation sleeve 202 . The connecting channel 218 is connected to the liquid storage chamber 215 through the drainage channel 219 .

[0050] During the process of rotating the pull plate 205, the synchronous rotation of the mounting block 208 can drive the adjusting rod 207 to be inserted into the liquid storage chamber 215, thereby driving the extrusion block 210 to squeeze the hydraulic oil stored in the liquid storage chamber 215, so that the hydraulic oil is introduced into the guide channel 217 through the drainage channel 219 and the connecting channel 218, and then can be injected into the adjusting chamber 227 through the conduit 221 to achieve the limitation of the electric clamp 220.

[0051] Working principle: The electric clamp 220 can be used to quickly connect to the connection end of the motor to be tested, and the connector on the connecting line 203 is used to connect to the output end and input end of the short-circuit detector body 1, so that the motor to be tested can be tested through the short-circuit detector body 1. During the process of connecting the connector to the output end and input end of the short-circuit detector body 1, the locking block 103 can be inserted into the interior of the sliding cavity 231 through the slot 206, and the connecting sleeve 201 can be rotated to drive the connecting rod 102 to slide along the inner wall of the slide groove 204. At this time, the locking block 103 is misaligned with the slot 206, thereby limiting the separation of the connecting sleeve 201 and the locking block 103, ensuring the test process. The second spring 211 is compressed when the locking block 103 is in a state of being loosened and the second spring 211 is compressed when the locking block 103 is in a state of being loosened and the second spring 211 is compressed when the second spring 211 is compressed and the second spring 211 is compressed.

[0052] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor short circuit fault detection device, comprising a short circuit detector body (1) and a connecting mechanism (2), characterized in that: A connecting plate (101) is embedded and installed on one side of the short-circuit detector body (1), and two symmetrically distributed through holes are opened on the surface of the connecting plate (101), and the output end and input end of the short-circuit detector body (1) are respectively located inside the two through holes, one end of the connecting mechanism (2) can be connected to the output end and input end of the short-circuit detector body (1), and the other end of the connecting mechanism (2) can be connected to the motor to be tested; Wherein, the connecting mechanism (2) comprises a clamping assembly and a protective assembly, the clamping assembly is used to quickly connect to the detection end of the motor to be tested, and the protective assembly is used to improve the stability of the clamping assembly; The clamping assembly comprises a connecting wire (203), one end of the connecting wire (203) is provided with a connector matching the output end and the input end of the short-circuit detector body (1), the other end of the connecting wire (203) is fixedly connected to an electric clamp (220), the surface of the connecting wire (203) is fixedly connected to a connecting tube (216), and a guide channel (217) is provided inside the connecting tube (216); The electric clamp (220) is composed of two clamping plates, wherein a rotating shaft (224) is fixedly connected to the surface of one of the clamping plates, and a connecting shell (222) is fixedly connected to the surface of the other clamping plate; The top of the rotating shaft (224) is fixedly connected to a connecting shaft (229) that is rotatably connected to the inner wall of the connecting shell (222); the surface of the connecting shaft (229) is provided with annularly distributed limiting grooves (230); an adjusting chamber (227) is provided inside the connecting shell (222); a sliding plate (225) is slidably connected to the inner wall of the adjusting chamber (227); a limiting rod (228) that matches the limiting groove (230) is fixedly connected to one side of the sliding plate (225) close to the connecting shaft (229); and a third spring (226) is fixedly connected between the other side of the sliding plate (225) and the inner wall of the adjusting chamber (227); A conduit (221) connected to the regulating cavity (227) is provided on the surface of the connecting shell (222), and the other end of the conduit (221) is connected to the flow guide channel (217).

2. A motor short circuit fault detection device according to claim 1, characterized in that: The other end of the rotating shaft (224) passes through the other splint and is rotatably connected to the inner wall of the connecting shell (222). A clockwork spring (223) is fixedly connected between the surface of the rotating shaft (224) and the inner wall of the connecting shell (222).

3. The motor short circuit fault detection device according to claim 1, characterized in that: The protective component includes a mounting sleeve (202) fixedly connected to the surface of the connecting wire (203), a connecting sleeve (201) fixedly connected to the surface of the mounting sleeve (202), a sliding groove (204) is provided on the side of the connecting sleeve (201) away from the electric clamp (220), a sliding cavity (231) is provided inside the connecting sleeve (201), a slot (206) connected to the sliding cavity (231) is provided on the side of the connecting sleeve (201) away from the electric clamp (220), the slot (206) is connected to the sliding groove (204), and the inner diameter of the slot (206) is larger than the inner diameter of the slot (204).

4. A motor short circuit fault detection device according to claim 3, characterized in that: The protective assembly further comprises two connecting rods (102) fixedly connected to the surface of the connecting plate (101) and respectively located above the two through holes, the other end of the connecting rod (102) being fixedly connected to an integrally formed locking block (103), the cross-sectional shape of the locking block (103) being a right-angled trapezoid, and the height of the locking block (103) being equal to the inner diameter of the slot (206), and the height of the connecting rod (102) being equal to the inner diameter of the slot (204).

5. The motor short circuit fault detection device according to claim 4, characterized in that: The inner wall of the sliding cavity (231) is slidably connected to a mounting block (208), the bottom of the mounting block (208) is provided with a mounting groove matching the locking block (103), the inner wall of the mounting groove is slidably connected to a baffle (213), the inner wall of the mounting block (208) is slidably connected to a slide plate (214), a second spring (211) is fixedly connected between the top of the slide plate (214) and the inner wall of the mounting block (208), the upper end of the baffle (213) passes through the mounting block (208) and is fixedly connected to the bottom of the slide plate (214), the top of the slide plate (214) is fixedly connected to a mounting rod (212), the upper end of the mounting rod (212) passes through the connecting sleeve (201) and is fixedly connected to the pull plate (205).

6. The motor short circuit fault detection device according to claim 5, characterized in that: A liquid storage cavity (215) is provided inside the connecting sleeve (201), and an extrusion block (210) is slidably connected to the inner wall of the liquid storage cavity (215). An adjusting rod (207) is fixedly connected to one side of the extrusion block (210), and the other end of the adjusting rod (207) passes through the liquid storage cavity (215) and is fixedly connected to the surface of the mounting block (208). A first spring (209) is fixedly connected between the other side of the extrusion block (210) and the inner wall of the liquid storage cavity (215), and the interior of the liquid storage cavity (215) is filled with hydraulic oil.

7. The motor short circuit fault detection device according to claim 6, characterized in that: A connecting channel (218) communicating with the guide channel (217) is provided inside the installation sleeve (202), a drainage channel (219) communicating with the liquid storage chamber (215) is provided inside the installation sleeve (202), and the connecting channel (218) is communicated with the liquid storage chamber (215) via the drainage channel (219).

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