Pump unit cover and pump unit

Abstract

To provide a pump unit cover and a pump unit, which enable size reduction of components and cost reduction.SOLUTION: A pump unit cover 16 for covering components of a pump unit 1 provided on a base 10, comprises: a first cover 31 having a pair of opposing first side walls 41, a second side wall 42 continuous with the pair of first side walls 41, and a first top wall 43 continuous with the pair of first side walls 41 and the second side wall 42; and a second cover 32 connected to the first cover 31, and having a pair of opposing third side walls 51 forming a pair of side walls together with the pair of first side walls 41, a fourth side wall 52 continuous with the pair of third side walls 51, and a second top wall 53 continuous with the pair of third side walls 51 and the fourth side wall 52 and forming a top wall together with the first top wall 43.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cover for a pump unit that covers a pump device and a control panel provided on a base, and a pump unit.

Background Art

[0002] Conventionally, a cover used for a pump unit and covering components such as a pump device and a control panel has been known (see, for example, Patent Document 1 and Patent Document 2). Further, for example, as a cover for a pump unit, there are configurations in which a top wall constituting four side walls and a top surface is integrally formed, and configurations in which the four side walls and the top wall are separated and divided into a plurality of parts such as being fixed to a frame or the like.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In manufacturing the above-described integrally formed cover, in resin molding or metal press forming, there was a limit to the size that could be manufactured depending on the capacity of the manufacturing machine. Therefore, when the cover is large, it is difficult to manufacture. Further, even if it could be manufactured, a large cover has problems such as requiring space for transportation and storage. Further, the cover requires operations of covering and removing from the upper part of the unit, and also requires a corresponding working space for attaching and detaching the cover.

[0005] Furthermore, with integrated covers, when installing a pump unit under an existing water tank, etc., if it is desired to add a cover to the pump unit later to protect it from wind and rain, it may not be possible to secure the necessary installation or working space, making it impossible to attach the cover.

[0006] In the aforementioned separate-type cover, the manufacturing of each part is easy, and because each part is relatively small, transportation and storage are also easy, and assembly and disassembly are often possible. However, separate-type covers have the problem of high labor and manufacturing costs due to the large number of parts and the long assembly time required.

[0007] As described above, large, one-piece covers require space during operation, transportation, and storage, while separate covers present problems such as increased labor and manufacturing costs.

[0008] Therefore, the present invention aims to provide a pump unit cover and a pump unit that enable miniaturization of components and reduce costs. [Means for solving the problem]

[0009] According to one aspect of the present invention, a pump unit cover is a pump unit cover that covers the components of a pump unit provided on a base, and comprises: a first cover having a pair of opposing first side walls, a second side wall continuous with the pair of first side walls, and a first top wall continuous with the pair of first side walls and the second side walls; and a second cover coupled to the first cover having a pair of opposing third side walls that form a pair of side walls together with the pair of first side walls, a fourth side wall continuous with the pair of third side walls, and a second top wall that forms a top wall together with the first top wall and is continuous with the pair of third and fourth side walls. The inner surface shape of the first cover is the same as or larger than the outer surface shape of the second cover, and the second cover can be placed inside the first cover. The first top wall has an overhang that covers the edge of the second top wall with a gap when the first cover and the second cover are joined together. . [Effects of the Invention]

[0010] The present invention can provide a pump unit cover and a pump unit that allow for miniaturization of components and reduction of costs. [Brief explanation of the drawing]

[0011] [Figure 1] A perspective view showing the configuration of a pump unit according to an embodiment of the present invention. [Figure 2] A perspective view showing the configuration of the pump unit. [Figure 3] A perspective view showing the configuration of a pump unit, with some components omitted. [Figure 4] A side view showing the configuration of a pump unit, with some components shown in cross-section. [Figure 5] A plan view showing the configuration of the cover used in the pump unit. [Figure 6] A perspective view showing the main components of the cover. [Figure 7] A perspective view showing the main components of the cover. [Figure 8] A perspective view showing the main components of the cover. [Figure 9] A cross-sectional view showing the main components of the cover. [Figure 10] An explanatory diagram showing an example of stacking the same cover. [Modes for carrying out the invention]

[0012] Hereinafter, the configuration of the pump unit 1 equipped with the cover 16 according to an embodiment of the present invention will be described with reference to Figures 1 to 10.

[0013] Figure 1 is a perspective view showing the configuration of the pump unit 1 according to an embodiment of the present invention from the front, and Figure 2 is a perspective view showing the configuration of the pump unit 1 from the rear. Figure 3 is a perspective view showing the configuration of the pump unit from the rear, with the second cover 32 of the cover 16 omitted. Figure 4 is a side view showing the configuration of the pump unit 1, with the cover 16 shown in cross-section. Figure 5 is a plan view showing the configuration of the cover 16 used in the pump unit 1 from the top side.

[0014] Figure 6 is a perspective view showing an enlarged view of the first top wall 43 of the first cover 31 of the cover 16 and the second top wall 53 of the second cover 32. Figure 7 is a perspective view showing an enlarged view of the first top wall 43 of the first cover 31 of the cover 16 and the second top wall 53 of the second cover 32, and showing in cross section the eaves portion 43b of the first top wall 43 and the protrusion 53b of the second top wall 53. Figure 8 is a perspective view showing an enlarged view of the first top wall 43 of the first cover 31 of the cover 16 and the second top wall 53 of the second cover 32, and showing in cross section the first flange 44 of the first cover 31 and the second flange 54 of the second cover 32. Figure 9 is a cross-sectional view showing an enlarged view of the first top wall 43 and the second top wall 53 of the cover 16. Figure 10 is an explanatory view schematically showing an example before and after stacking of the cover 16.

[0015] As shown in FIGS. 1 to 4, the pump unit 1 includes a base 10, one or more pump devices 11, a suction pipe 12, a discharge pipe 13, an accumulator 14, a control panel 15, and a cover 16. Further, the pump unit 1 may have a check valve, a pressure sensor, a flow sensor, etc. [[ID=???]]

[0016] The base 10 is placed or fixed on the installation surface of the pump unit 1. The base 10 fixedly supports the pump device 11 and the control panel 15 on the upper surface. For example, the base 10 may have a support member 10a for fixedly supporting the cover 16. The base 10 is, for example, formed in a rectangular shape. When one direction along the upper surface is defined as the front-rear direction and one direction orthogonal to the front-rear direction along the upper surface is defined as the left-right direction, the pump 22 (to be described later) of the pump device 11, the suction pipe 12, and the discharge pipe 13 are arranged on the front side, and the motor 21 (to be described later) of the pump device 11 and the control panel 15 are arranged on the rear side. When a pair of pump devices 11 are provided, one pump device 11 is arranged on the right side in the left-right direction, and the other pump device 11 is arranged on the left side.

[0017] The pump devices 11 are provided in a pair, for example. The pump devices 11 are, for example, horizontal-axis pumps, but may also be vertical-axis pumps. The pump device 11 includes a motor 21 and a pump 22. The motor 21 is connected to, for example, the control panel 15 and is controlled by the control panel 15 so that its frequency can be variably controlled. The motor 21 is connected to the pump 22 and drives the pump 22. The motor 21 is fixed to the pump 22. Note that the motor 21 may be, for example, fixed to the pump 22 and supported by the base 10.

[0018] The pump 22 includes, for example, a pump casing 22a and an impeller that is connected to the rotating shaft of the motor 21 and housed inside the pump casing. The pump 22 may be a single-stage pump with one impeller provided, or a multi-stage pump with a plurality of impellers provided. The pump casing 22a has legs 22b that are fixed to the base 10 by fastening members such as bolts.

[0019] The suction pipe 12 is connected to the suction port of the pump casing 22a or forms the suction port of the pump casing 22a. The suction pipe 12 has, for example, a flange to which other pipes can be connected. The suction pipe 12 is, for example, a pipe connected to the suction port of each pump casing 22a. Note that the suction pipe 12a may be a branch pipe whose secondary side branches and is connected to the suction port of each pump casing 22a.

[0020] The discharge pipe 13 is connected to the discharge port of the pump casing 22a. The discharge pipe 13 has, for example, a flange to which other pipes can be connected. The discharge pipe 13 is, for example, a confluence pipe that is connected to the discharge port of each pump casing 22a and converges on the secondary side. The accumulator 14 is connected to the discharge pipe 13, for example.

[0021] The control panel 15 houses electrical components, including, for example, a display unit, an inverter, a memory unit, and a control unit. Alternatively, the control panel 15 may not have an inverter, and the inverter may be mounted on the motor 21. The display unit is a display or LED, etc., capable of displaying the operating status of the pump device 11, whether there are any abnormalities, etc. The inverter is electrically connected to the motor 21 and the control unit via signal lines. For example, two inverters, the same number as the motor 21, may be provided. The inverter is a control circuit that controls the frequency of the motor 21. The control panel 15 may also have a communication unit capable of wireless communication with an external terminal.

[0022] The memory unit stores, for example, the starting pressure for activating the pump device 11, the target pressure and rated flow rate during water supply, and the stop flow rate for stopping water supply. The memory unit also stores various programs, such as a control program for controlling the inverter by the control unit during water supply operation, and a fault detection program for detecting failures of check valves and various sensors.

[0023] The control unit controls the inverter based on the pressure and flow rate detected by the pressure sensor and flow rate sensor, for example, and controls the pump device 11 so that the discharge pressure is constant or the estimated terminal pressure is constant.

[0024] The cover 16 is a cover for the pump unit that covers each component provided on the base 10. As shown in Figures 1 to 6, the cover 16 comprises a first cover 31 and a second cover 32. The cover 16 is divided into two parts, the first cover 31 and the second cover 32, in the front-to-back, left-to-right, or up-and-down direction of the pump unit 1, and is formed so that the first cover 31 and the second cover 32 can be assembled and separated as a single unit, and so that the first cover 31 and the second cover 32 can be stacked. For example, the cover 16 is divided in the front-to-back direction, and is formed so that the first cover 31 and the second cover 32 can be assembled as a single unit in the front-to-back direction.

[0025] The first cover 31 has a pair of opposing first side walls 41, a second side wall 42 continuous with the pair of first side walls 41, and a first top wall 43 continuous with the pair of first side walls 41 and the second side walls 42. The first cover 31 has the second side walls 42 forming the front wall of the cover 16, and is open at the rear and bottom. The first cover 31 is positioned, for example, on the front side of the base 10. The first cover 31 also has a first flange 44 for fastening to the second cover 32 with a fastening member.

[0026] The pair of first side walls 41 form part of the left and right side walls of the cover 16. The pair of first side walls 41 are formed along the front-rear direction. Alternatively, the pair of first side walls 41 may be inclined such that their width in the left-right direction gradually narrows from the rear towards the second side wall 42. The pair of first side walls 41 also have a plurality of recesses (first recesses) 41a that extend along the direction in which the first side walls 41 are extended or along the front-rear direction.

[0027] The recess 41a extends, for example, in the front-rear direction (towards the front) from the front edge of the first side wall 41 and curves inward toward the first cover 31 with a predetermined radius of curvature. Specifically, the recess 41a is a semi-cylindrical or substantially semi-cylindrical recess, that is, a recess with a substantially semi-circular cross-sectional shape extending in the front-rear direction.

[0028] The second side wall 42 forms the front wall of the cover 16. The second side wall 42 has, for example, a pair of first openings 42a that open to the left and right sides and face the suction pipe 12, and a single second opening 42b that opens to the center and faces the discharge pipe 13. For example, the first openings 42a and the second openings 42b are formed in a shape that allows for the placement of piping connected to the suction pipe 12 and the discharge pipe 13. Alternatively, for example, as shown in Figure 1, the second side wall 42 may have a third opening 42c that is larger than the second opening 42b, and a panel 42d having the second opening 42b formed thereon that closes the third opening 42c.

[0029] The first top wall 43 forms a part of the top wall of the cover 16. The first top wall 43 includes, for example, a plurality of recesses (first recesses) 43a extending along the extension direction of the first top wall 43 or along the front-rear direction, and an eaves portion 43b formed on the edge of the first top wall 43 opposite to the second side wall 42. Furthermore, the first top wall 43 is, for example, higher on the rear side than on the second side wall 42 side, and gradually slopes from the rear side toward the second side wall 42.

[0030] The recess 43a extends, for example, from the rear edge of the first top wall 43 in the front-rear direction (towards the front) and curves inward toward the first cover 31 with a predetermined radius of curvature. Specifically, the recess 43a is a semi-cylindrical or substantially semi-cylindrical recess, that is, a recess with a substantially semi-circular cross-sectional shape extending in the front-rear direction.

[0031] The eaves portion 43b faces the second top wall 53 of the second cover 32, which will be described later, with a gap between them. The eaves portion 43b extends, for example, toward the second cover 32 than the first flange 44. The eaves portion 43b may be formed intermittently in multiple locations along the edge of the first top wall 43, or it may be formed continuously and integrally. In this embodiment, as shown in Figures 1, 3, 4 to 8, the eaves portion 43b is formed in multiple locations with a partially intermittent shape, meaning that it is not provided in locations that face the multiple recesses 43a in the front-rear direction, but is not provided in locations that face the multiple recesses 43a in the front-rear direction.

[0032] The first flange 44 is formed on the edges of a pair of first side walls 41 and / or a first top wall 43. In this embodiment, the first flange 44 is formed on the edges of a pair of first side walls 41 and a first top wall 43. The first flange 44 has, for example, portions formed at the ends of a plurality of recesses 41a formed in the pair of first side walls 41 and a plurality of recesses 43a formed in the first top wall 43, into which fastening members are inserted or holes 44a into which fastening members are screwed.

[0033] The second cover 32 is connected to the first cover 31 by fastening members such as bolts and nuts. The second cover 32 has a pair of opposing third side walls 51, a fourth side wall 52 continuous with the pair of third side walls 51, and a second top wall 53 continuous with the pair of third side walls 51 and the fourth side wall 52. The fourth side wall 52 of the second cover 32 forms the rear wall of the cover 16, and the front and bottom are open. The second cover 32 is positioned, for example, on the rear side of the base 10. The second cover 32 also has a second flange 54 for fastening to the first cover 31 with fastening members. The second cover 32 covers, for example, the main electrical components located on the base 10, such as the motor 21 and the control panel 15.

[0034] The pair of third side walls 51 form part of the left and right side walls of the cover 16. That is, together with the pair of first side walls 41, the pair of third side walls 51 form a pair of left and right side walls of the cover 16. The pair of third side walls 51 are formed along the front-rear direction. Alternatively, the pair of third side walls 51 may be inclined such that their width in the left-right direction gradually narrows from the front toward the fourth side wall 52. The pair of third side walls 51 also have a plurality of recesses (second recesses) 51a that extend along the direction in which the third side walls 51 are extended or along the front-rear direction.

[0035] The recess 51a extends, for example, from the rear edge of the third side wall 51 in the front-rear direction (rearward side) and curves inward toward the second cover 32 with a predetermined radius of curvature. Specifically, the recess 51a is a semi-cylindrical or substantially semi-cylindrical recess, that is, a recess with a substantially semi-circular cross-sectional shape extending in the front-rear direction. Furthermore, the recess 51a of the third side wall 51 has a larger radius of curvature than the recess 41a of the first side wall 41. That is, the radius of curvature of the outer circumferential surface of the recess 51a of the third side wall 51 is the same as or larger than the radius of curvature of the inner circumferential surface of the recess 41a of the first side wall 41, so that the recess 51a of the third side wall 51 can be positioned in the recess 41a of the first side wall 41.

[0036] The fourth side wall 52 forms the rear wall of the cover 16 in the front-rear direction. The fourth side wall 52 has a window 52a that allows the display section of the control panel 15 to be viewed, for example. For example, the window 52a is made of a transparent resin material. In addition, one or more fourth openings 52b for introducing air are formed at the lower end of the fourth side wall 52. For example, the fourth openings 52b are located below the motor 21.

[0037] The second top wall 53 forms part of the top wall of the cover 16. That is, the second top wall 53, together with the first top wall 43, forms the upper top wall of the cover 16. The second top wall 53 includes, for example, a plurality of recesses (second recesses) 53a that extend along the extension direction of the second top wall 53 or along the front-rear direction, and a projection 53b formed on the edge of the second top wall 53 opposite to the fourth side wall 52. The second top wall 53 is also, for example, higher on the front side than on the side of the fourth side wall 52, and gradually slopes from the front side toward the fourth side wall 52. When the first cover 31 and the second cover 32 are combined, the second top wall 53 is located below the first top wall 43, forming a gap between them. That is, the first top wall 43 and the second top wall 53 overlap with a gap between their ends in the vertical direction.

[0038] The recess 53a extends, for example, from the front edge of the second top wall 53 in the front-rear direction (rearward side) and curves inward toward the first cover 31 with a predetermined radius of curvature. Specifically, the recess 53a is a semi-cylindrical or substantially semi-cylindrical recess, that is, a recess with a substantially semi-circular cross-sectional shape extending in the front-rear direction. Furthermore, the recess 53a of the second top wall 53 has a larger radius of curvature than the recess 43a of the first top wall 43. That is, the radius of curvature of the outer surface of the recess 53a of the second top wall 53 is the same as or larger than the radius of curvature of the inner surface of the recess 43a of the first top wall 43, so that the recess 53a of the second top wall 53 can be positioned in the recess 43a of the first top wall 43.

[0039] The recesses 41a, 43a, 51a, and 53a formed in the first side wall 41, the first top wall 43, the third side wall 51, and the second top wall 53 are formed to be long in one direction (for example, in the front-to-back direction or in the direction in which each wall 41, 43, 51, and 53 extends). For example, the recesses 41a, 43a, 51a, and 53a are formed across both ends in the front-to-back direction of the first side wall 41, the first top wall 43, the third side wall 51, and the second top wall 53, but they may also be provided from the overlapping end of the first cover 31 and the second cover 32 of the first side wall 41, the first top wall 43, the third side wall 51, and the second top wall 53 to the middle in one direction toward the other end. Furthermore, if each wall 41, 43, 51, and 53 on which the recesses 41a, 43a, 51a, and 53 are formed is inclined, the depth of the recesses 41a, 43a, 51a, and 53a may change gradually in accordance with the inclination.

[0040] As shown in Figures 6 to 9, the projection 53b is integrally formed on the edge of the second ceiling wall 53 and is provided opposite to the eaves 43b. The projection 53b extends upward in a plate-like shape from the edge of the second ceiling wall 53. The projection 53b is positioned opposite the base end of the eaves 43b and is formed at a height that creates a predetermined gap between it and the eaves 43b. That is, a gap constituting an exhaust port is formed between the lower surface of the eaves 43b and the upper surface of the upper end of the projection 53b. For example, multiple projections 53b are provided adjacent to the second flange 54.

[0041] The second flange 54 is formed on the edges of a pair of third side walls 51 and / or a second top wall 53. In this embodiment, the second flange 54 is formed on the edges of a pair of third side walls 51 and a second top wall 53. The second flange 54 has holes 54a formed at the ends of, for example, a plurality of recesses 51a formed in the pair of third side walls 51 and a plurality of recesses 53a formed in the second top wall 53, into which fastening members are inserted or into which fastening members are screwed. The second flange 54 is formed to face and be able to abut against the first flange 44, with each hole 54a of the second flange 54 facing each hole 44a of the first flange 44.

[0042] In the pump unit 1 configured in this way, the inner surface shape of the first cover 31 is the same as, or larger than, the outer surface shape of the second cover 32. Furthermore, the first flange 44 of the first cover 31 is formed to be able to abut against the second flange 54 of the second cover 32. As a result, the first cover 31 is formed to be able to be joined to the second cover 32 by fastening members, with the first flange 44 and the second flange 54 in contact and the holes 44a and 54a facing each other.

[0043] Furthermore, the first cover 31 is formed so that the second cover 32 can be inserted from the fourth side wall 52 side of the second cover 32 through a rear opening, that is, an opening formed by a pair of first side walls 41 and a first top wall 43. The recesses 41a and 43a of the first cover 31 and the recesses 51a and 53a of the second cover 32 engage in a direction perpendicular to the extending direction of each recess 41a, 43a, 51a, and 53a.

[0044] As a result, when mounting the cover 16 onto the base 10, the recesses 41a, 43a, 51a, and 53a guide the sliding movement when assembling the first cover 31 and the second cover 32 by sliding them. Also, when mounting the cover 16 onto the base 10, when the first cover 31 is placed over the second cover 32 from above, the recess 41a of the first side wall 41 comes into contact with the third side wall 51. The curved inner surface of the recess 41a presses the first side wall 41 and the third side wall 51 in the left-right direction (inward and outward of the cover 16), making it easier to assemble the first cover 31 and the second cover 32.

[0045] Thus, the cover 16 can be divided into two parts, the first cover 31 and the second cover 32, and can be combined as a single unit. Therefore, the first cover 31 and the second cover 32 can be made smaller than the cover 16 as a whole, thereby reducing the limitations imposed by the capacity of the manufacturing machine and facilitating manufacturing.

[0046] Furthermore, when the cover 16 is placed on the base 10, it can be attached and detached not only by placing it over the base 10, but also by sliding it along the top surface of the base 10. This makes the attachment and detachment of the cover 16 easier, reduces the workspace required for attachment and detachment, and increases the flexibility of the workspace.

[0047] Furthermore, the first cover 31 and the second cover 32 are fastened together by bringing the first flange 44 and the second flange 54 into contact and fastening them with fastening members. By providing holes 44a and 54a for inserting the fastening members at the locations where recesses 41a, 43a, 51a, and 53a exist, the recesses 41a, 43a, 51a, and 53a can be used as space to position and rotate a tool for fastening the fastening members, such as a screwdriver or a hex socket. This minimizes the outward protrusion of the first flange 44 and the second flange 54, making it possible to miniaturize the cover 16. In addition, the cover 16 only requires assembling two components, the first cover 31 and the second cover 32, thus suppressing an increase in the number of parts and reducing assembly time.

[0048] Therefore, the cover 16 prevents an increase in manufacturing costs and improves productivity. In addition, maintenance is highly efficient because the component to be maintained can be serviced by removing the first cover 31 or the second cover 32 that covers the component to be serviced.

[0049] Furthermore, as shown in Figure 10, the first cover 31 and the second cover 32 can be stacked by inserting the other into the first, thereby reducing the space required for transportation and storage. In addition, when the first cover 31 and the second cover 32 are stacked, the recess 41a of the first cover 31 and the recess 51a of the second cover 32 engage with each other, preventing the second cover 32 from falling off from below the first cover 31.

[0050] Furthermore, the first ceiling wall 43 and the eaves 43b are spaced apart from the upper surface of the second ceiling wall 53, and the eaves 43b and the projection 53b are also spaced apart. As a result, the gap between the eaves 43b and the projection 53b becomes an exhaust vent for exhausting air from inside the cover 16, preventing heat from accumulating inside the cover 16. In other words, the cover 16 can prevent rainwater from entering without impairing exhaust performance, and its strength can be improved by having the first flange 44 and the second flange 54 on the first ceiling wall 43 and the second ceiling wall 53.

[0051] Furthermore, since the eaves 43b is positioned behind the edge of the second ceiling wall 53, rainwater can be prevented from entering between the first ceiling wall 43 and the second ceiling wall 53. Also, even if rainwater enters the end of the second ceiling wall 53 from the end of the eaves 43b, the projection 53b and the second flange 54 can prevent the rainwater from entering the cover 16. Moreover, the second cover 32 has a second ceiling wall 53 that is lower than the first ceiling wall 43 of the first cover 31, and the second cover 32 covers the main electrical components such as the motor 21 and the control panel 15, so even if rainwater enters through the gap between the first ceiling wall 43 and the second ceiling wall 53, or through the gap between the eaves 43b and the projection 53b, it can be prevented from coming into contact with these electrical components.

[0052] Furthermore, by configuring the first ceiling wall 43 and the second ceiling wall 53 to slope downward toward the second side wall 42 and the fourth side wall 52, rainwater accumulated on the first ceiling wall 43 and the second ceiling wall 53 flows off the cover 16, thereby preventing rainwater from entering the cover 16.

[0053] Furthermore, the multiple recesses 41a, 43a, 51a, and 53a formed in the first cover 31 and the second cover 32 can reinforce the first cover 31 and the second cover 32, in addition to the effects described above.

[0054] As described above, the pump unit 1 and the cover 16 for the pump unit 1 according to the embodiment allow for miniaturization of components and reduction of costs.

[0055] It should be noted that the present invention is not limited to the embodiments described above. For example, in the above example, the first cover 31 and the second cover 32 were described as being joined by fastening members, but the invention is not limited to this, and the first cover 31 and the second cover 32 may be engaged by fitting together.

[0056] Furthermore, in the example described above, the first flange 44 and the second flange 54 are provided not only on the pair of first side walls 41 and the pair of third side walls 51, but also on the first ceiling wall 43 and the second ceiling wall 53. However, the explanation is not limited to this configuration, and they may not be provided on the first ceiling wall 43 and the second ceiling wall 53. For example, if the first flange 44 and the second flange 54 are not provided on the first ceiling wall 43 and the second ceiling wall 53, the eaves portion 43b and the projection 53b may be provided continuously and integrally on the respective edges of the first ceiling wall 43 and the second ceiling wall 53.

[0057] Furthermore, although the first ceiling wall 43 and the second ceiling wall 53 have been described as having recesses 43a and 53a, the configuration is not limited to this, and they may also be configured without recesses 43a and 53a. This will further prevent rainwater from accumulating on the upper surface of the first ceiling wall 43 and the second ceiling wall 53. In addition, the first cover 31 and the second cover 32 may have ribs on their inner surfaces for reinforcement or to allow resin flow during resin molding. Furthermore, the first cover 31 and the second cover 32 may be molded from a resin material or formed from a metal material.

[0058] It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways during implementation without departing from its essence. Furthermore, each embodiment may be combined as appropriate, and in that case, the combined effects can be obtained. Moreover, the above embodiments include various inventions, and various inventions can be extracted by selecting combinations from the multiple constituent elements disclosed. For example, if the problem can be solved and effects obtained even if some constituent elements are deleted from all the constituent elements shown in the embodiment, then the configuration with these deleted constituent elements can be extracted as an invention. The following is a description equivalent to the invention described in the original claims of this application. [1] A pump unit cover that covers the components of a pump unit mounted on a base, A first cover having a pair of opposing first side walls, a second side wall continuous with the pair of first side walls, and a first top wall continuous with the pair of first side walls and the second side wall, A second cover coupled to the first cover, having a pair of opposing third side walls that form a pair of side walls together with the pair of first side walls, a fourth side wall continuous with the pair of third side walls, and a second top wall that forms a top wall together with the first top wall and is continuous with the pair of third and fourth side walls, A cover for a pump unit equipped with the necessary features. [2] The pump unit cover according to [1], wherein the inner surface shape of the first cover is the same as or larger than the outer surface shape of the second cover, and the second cover can be placed inside the first cover. [3] The pump unit cover according to [2], wherein the first top wall has an overhang that covers the edge of the second top wall with a gap when the first cover and the second cover are joined together. [4] The pump unit cover according to [3], wherein the second top wall has a projection formed on the edge and extending toward the first top wall. [5] The components include a pump device having a motor and a control panel, The second cover is a pump unit cover as described in [3], which covers the motor and the control panel. [6] The first cover has a plurality of first recesses that are elongated in one direction and formed in the pair of first side walls and / or the first top wall, The second cover has a plurality of second recesses that are elongated in one direction and formed in the pair of third side walls and / or the second top wall, The first recess and the second recess extend along the direction in which the first cover and the second cover are aligned. The pump unit cover according to [5], wherein the radius of curvature of the inner surface of the first recess is greater than the radius of curvature of the outer surface of the second recess. [7] The first cover has a first flange formed on the pair of first side walls, The pump unit cover according to [6], wherein the second cover has a second flange formed on the pair of third side walls. [8] The pump unit cover according to [7], wherein the first flange and the second flange have holes for inserting fastening members in the portions located in the plurality of first recesses and the plurality of second recesses. [9] Bass and, A pump device arranged on the base, A control panel placed on the base, A pump unit cover as described in any one of the items [1] to [8], A pump unit equipped with the following features. [Explanation of Symbols]

[0059] 1...Pump unit, 10...Base, 10a...Support member, 11...Pump device, 12...Suction pipe, 12a...Suction pipe, 13...Discharge pipe, 14...Accumulator, 15...Control panel, 16...Cover (Cover for pump unit), 21...Motor, 22...Pump, 22a...Pump casing, 22b...Legs, 31...First cover, 32...Second cover, 41...First side wall, 41a...Recess (First recess), 42...Second 2 side walls, 42a...first opening, 42b...second opening, 42c...third opening, 42d...panel, 43...first top wall, 43a...recess (first recess), 43b...eaves, 44...first flange, 44a...hole, 51...third side wall, 51a...recess (second recess), 52...fourth side wall, 52a...window section, 52b...fourth opening, 53...second top wall, 53a...recess (second recess), 53b...projection, 54...second flange, 54a...hole.

Claims

1. A pump unit cover that covers the components of a pump unit mounted on a base, A first cover having a pair of opposing first side walls, a second side wall continuous with the pair of first side walls, and a first top wall continuous with the pair of first side walls and the second side wall, A second cover coupled to the first cover, having a pair of opposing third side walls that form a pair of side walls together with the pair of first side walls, a fourth side wall continuous with the pair of third side walls, and a second top wall that forms a top wall together with the first top wall and is continuous with the pair of third and fourth side walls, Equipped with, The inner surface shape of the first cover is the same as, or larger than, the outer surface shape of the second cover, and the second cover can be placed inside the first cover. The first top wall has an overhang that covers the edge of the second top wall with a gap when the first cover and the second cover are joined together, the cover for the pump unit.

2. The pump unit cover according to claim 1, wherein the second top wall has a projection formed on its edge and extending toward the first top wall.

3. The aforementioned components include a pump device having a motor and a control panel. The second cover covers the motor and the control panel, as described in claim 1 for a pump unit.

4. The first cover has a plurality of first recesses that are elongated in one direction and formed in the pair of first side walls and / or the first top wall, The second cover has a plurality of second recesses that are elongated in one direction and formed in the pair of third side walls and / or the second top wall, The first recess and the second recess extend along the direction in which the first cover and the second cover are aligned. The pump unit cover according to claim 3, wherein the radius of curvature of the inner surface of the first recess is greater than the radius of curvature of the outer surface of the second recess.

5. The first cover has a first flange formed on the pair of first side walls, The pump unit cover according to claim 4, wherein the second cover has a second flange formed on the pair of third side walls.

6. The pump unit cover according to claim 5, wherein the first flange and the second flange have holes formed in the portions located in the plurality of first recesses and the plurality of second recesses for inserting fastening members.

7. Bass and, A pump device arranged on the base, A control panel placed on the base, A pump unit cover according to any one of claims 1 to 6, A pump unit equipped with the following features.

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