Pump unit device

Abstract

To provide a pump unit device which can properly attach an expansion tank to a pedestal.SOLUTION: In a pump unit A, first and second object parts 43A, 43B for attaching an expansion tank 2 to a pedestal 4 to which a pump unit 1 in which a pump P is arranged in a casing 10 is attached, a bracket 5 for the expansion tank 2 comprises a support part 5C for supporting the expansion tank 2, and first and second extension parts 5A, 5B having first and second attachment parts Aa, Ab protruding in a horizontal direction from the support part 5C and attached to the first and second attachment object parts 43A. 43B, and at least either of the first and second extension parts 5A, 5B is constituted by connecting a plurality of members, and set so as to be changeable in a total length dimension by changing connecting points of the plurality of members.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a pump unit device that is suitable for applications such as circulating hot water through a fixed route between a heat exchanger for heating the water in a bathtub in a large public bath, or circulating hot water for discharging through a fixed route in an instant hot water supply system. [Background technology]

[0002] The applicant of the present invention has previously proposed the pump unit device described in Patent Document 1 as a specific example thereof. The pump unit device described in the document includes a pump unit having a pump disposed inside a housing, an expansion tank connected to the pump unit by piping, and a stand for mounting the pump unit. The expansion tank is a tank for absorbing expansion caused by an increase in temperature of the hot water that is the object of the pump. The expansion tank is attached to the frame so as to be located below the pump unit, without being disposed inside the housing of the pump unit. If the expansion tank were disposed inside the housing of the pump unit (see, for example, Patent Document 2), the housing would become large, leading to increases in the volume, weight, and cost of the entire pump unit. In contrast, if the expansion tank is disposed outside the housing, such problems can be suppressed.

[0003] However, the above-mentioned conventional techniques still have room for improvement, as described below.

[0004] It is desirable to stably mount the expansion tank. One possible method for achieving this is to use an appropriate bracket to fix the expansion tank to a frame. Meanwhile, the frame is generally configured with multiple supports. Therefore, one possible method for fixing the expansion tank to the frame is to place the expansion tank between multiple supports of the frame and have the expansion tank supported by these multiple supports. However, in the past, no means had been proposed that could reasonably and appropriately achieve this. The problem here is that the specifications of the mounting frame are not uniform, but are changed as appropriate depending on the conditions of use of the pump unit device. When the specifications of the mounting frame are changed, the distance between the multiple supports is usually also changed as appropriate. In order to optimize the installation of the expansion tank, it is desirable to be able to respond appropriately to such circumstances. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5811328 [Patent Document 2] International Publication No. 2021 / 191959 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been devised in light of the above-mentioned circumstances, and an object of the present invention is to provide a pump unit device that enables an expansion tank to be appropriately attached to a stand. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following technical solutions.

[0008] The pump unit device provided by the present invention is a pump unit device comprising a pump unit having a pump disposed within a housing, an expansion tank connected to the pump unit by piping and disposed outside the housing, and a stand for mounting the pump unit and the expansion tank, the stand being provided with first and second mounting targets disposed horizontally spaced apart from each other as portions for mounting the expansion tank, and a bracket for the expansion tank being provided as a means for mounting the expansion tank to the first and second mounting targets. This bracket comprises a support portion that supports the expansion tank, a first extension portion that protrudes horizontally from the support portion and has a first attachment portion for attachment to the first attachment target portion, and a second extension portion that protrudes horizontally from the support portion in the opposite direction to the first extension portion and has a second attachment portion for attachment to the second attachment target portion, and is characterized in that at least one of the first and second extension portions is constructed by connecting a plurality of members, and the overall length dimension can be changed by changing the connection points of these plurality of members.

[0009] According to this configuration, the following effects can be obtained. That is, with the expansion tank supported on the support part of the bracket for the expansion tank, the first and second mounting parts of the bracket are mounted on the first and second mounting target parts provided on the mount, thereby enabling the expansion tank to be properly mounted on the mount. Also, at least one of the first and second extension parts of the bracket is made changeable in overall length. Therefore, even if the relative distance between the first and second mounting target parts is changed due to a change in the specifications of the mount, it is possible to properly align the positions of the first and second mounting parts of the bracket with the first and second mounting target parts of the mount and mount them, which is convenient. As a means for changing the overall length dimension of at least one of the first and second extension portions, a means for changing the connection points of multiple components is adopted, thereby making it possible to simplify the configuration and reduce manufacturing costs while ensuring sufficient strength.

[0010] In the present invention, preferably, the support portion of the bracket has a pair of clamp pieces that can be set in an opposing state to each other, and the expansion tank can be sandwiched and held between the pair of clamp pieces.

[0011] With this configuration, the support portion of the bracket can be simplified in structure, and the expansion tank can be held easily and accurately.

[0012] In the present invention, preferably, of the first and second extension portions of the bracket, only the second extension portion is made capable of changing an overall length dimension, and the first extension portion is not made capable of changing an overall length dimension.

[0013] With this configuration, compared to when the overall length of each of the first and second extension parts is changeable, the overall configuration of the bracket can be simplified and manufacturing costs can be further reduced. In addition, when adjusting the overall length of the bracket, it is only necessary to operate the second extension part, which makes the adjustment easy to do.

[0014] In the present invention, preferably, the horizontal overall length dimension of the first extension portion is shorter than the overall length dimension when the horizontal overall length dimension of the second extension portion is set to be shortest, and when the expansion tank is attached to the frame, the expansion tank is configured to be positioned closer to the first mounting target portion than the horizontal center between the first and second mounting target portions.

[0015] According to this configuration, the following effects can be obtained. That is, if the expansion tank is located at the center between the first and second mounting target parts of the frame, there is a risk that the expansion tank will be prone to shaking. In contrast, if the expansion tank is positioned so that it is biased toward the first mounting target part, this risk can be reduced. According to the above configuration, even if the overall horizontal dimension of the second extension part is made the shortest, the expansion tank will be positioned so that it is biased toward the first mounting target part, which is even more preferable.

[0016] In the present invention, preferably, the stand comprises a base portion that is placed on the ground or a floor, and at least two pillars that rise upward from the base portion and are arranged horizontally spaced apart, the pump unit is attached to a portion near the upper part of the two pillars, and the first and second mounting targets are provided in the area of ​​the two pillars below the pump unit.

[0017] With this configuration, the pump unit can be attached to a position near the upper part of the two pillars of the stand, and the expansion tank can be positioned lower than the pump unit and stabilized, allowing it to be appropriately attached to the two pillars of the stand in a space-efficient manner.

[0018] Other features and advantages of the present invention will become more apparent from the following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings. [Brief description of the drawings]

[0019] [Figure 1] 1 is a schematic front view showing an example of a hot water treatment system equipped with a pump unit device according to the present invention. [Diagram 2] 2 is an explanatory diagram showing a schematic internal configuration of the hot water treatment system shown in FIG. 1. [Diagram 3] 2 is an exploded schematic perspective view of the hot water treatment system shown in FIG. 1. [Figure 4]FIG. 2(a) is a front perspective view of an expansion tank and its bracket in the pump unit apparatus shown in FIG. 1, and FIG. 2(b) is a rear perspective view of FIG. [Diagram 5] FIG. 5(a) is a front view of the expansion tank and its bracket shown in FIG. 4, and FIG. [Figure 6] FIG. 6 is a plan sectional view showing another example of a mounting mode of the expansion tank and its bracket shown in FIGS. 4 and 5. [Figure 7] FIG. 6(a) is a front view showing an example in which the overall length dimension of the bracket shown in FIGS. 4 and 5 is changed, and FIG. 6(b) is a plan sectional view thereof. [Figure 8] 6 is an explanatory diagram showing an intermediate process of assembling a bracket to the expansion tank shown in FIGS. 4 and 5. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0021] 1 to 3 show a hot water treatment system SY in which a pump unit device A is combined with a hot water supply device B. 2, pump unit apparatus A includes pump unit 1 having pump P housed within housing 10, and expansion tank 2 located outside housing 10. Hot water supply apparatus B includes hot water heating section 31 housed within housing 30. Also included is stand 4 serving both for mounting the pump unit and the hot water supply apparatus.

[0022] An internal water inlet pipe 11 and an internal water outlet pipe 12 are connected to the pump P of the pump unit 1, and hot water can be supplied to the water inlet 11a at the beginning of the internal water inlet pipe 11 via external piping 18. An air-water separator 13a and an automatic air vent valve 13b are provided in the internal water outlet pipe 12, and the hot water that reaches the water outlet 12a at the end of the internal water outlet pipe 12 is supplied to the water inlet 32a of the hot water supply device B via piping 17. The hot water supplied to the water inlet 32a is The hot water is sent to hot water heating section 31 of B and heated. Hot water heating section 31 is formed, for example, by combining a burner and a heat exchanger. The hot water heated in hot water heating section 31 is then sent from outlet 32b via external piping 19 to a desired destination. Expansion tank 2 is connected to external piping 18 or internal water inlet pipe 11 via piping section 16, and plays a role in absorbing the thermal expansion of the hot water in the hot water distribution path described above.

[0023] The hot water sent to pump P via external piping 18 is, for example, hot water supplied to a heat exchanger for heating the hot water in a bathtub in a large public bath, and after heat exchange, the hot water is sent to water heater B using pump unit 1 and heated. In this way, the hot water is brought to an appropriate temperature and then sent to the heat exchanger via external piping 19. However, the uses and modes of use of pump unit apparatus A according to the present invention are not limited to this.

[0024] 3, the stand 4 includes a base portion 40, such as a rectangular frame-like member, which is placed on the ground or a floor, a plurality of (three in the illustrated example) support columns 41 (41a-41c) standing upward from the base portion 40, and a pair of upper and lower horizontal installation portions 42a, 42b horizontally installed at the upper portion and at an intermediate height position of the support columns 41. The housings 30, 10 of the water heating device B and the pump unit 1 are attached to the pair of horizontal installation portions 42a, 42b in a horizontally aligned arrangement on the left and right. This attachment means is, for example, a fastening means using a screw member 90 such as a screw.

[0025] The expansion tank 2 is attached to the supports 41 a and 41 b of the frame 4 using a bracket 5 . This point will be explained in more detail.

[0026] First and second mounting target portions 43A, 43B are provided on the pillars 41a, 41b of the stand 4 at positions below the housing 10 of the pump unit 1 as portions for mounting the bracket 5. In this embodiment, the first and second mounting target portions 43A, 43B are portions in which screw member insertion holes 44a, 44b are provided, respectively.

[0027] 4 and 5, the bracket 5 is formed by combining first to fourth members 51 to 54. The bracket 5 also includes a support portion 5C (area L3 in FIG. 5(b)) for supporting the expansion tank 2, and first and second extension portions 5A and 5B (areas L1 and L2 in FIG. 5(b)). The first and second members 51, 52 are bent belt-like and symmetrical to each other. They can also be used by inverting the same shaped members. Each of the first and second members 51, 52 has a semi-frame-shaped clamp piece 55 formed by bending and connecting three flat wall portions 55a, and first and second protruding pieces 56a, 56b connected to both ends of the clamp piece 55. When the first and second members 51, 52 are brought into contact with each other, the pair of clamp pieces 55 become hexagonal, forming a support portion 5C that surrounds and clamps the expansion tank 2. An elastic member 99 such as a sheet-like rubber is interposed between the support portion 5C and the expansion tank 2. The first and second members 51, 52 are connected to each other by a means for fastening the first and second projecting pieces 56a, 56b with screw members 91, 92, respectively.

[0028] The third member 53 is, for example, in the form of a bent plate, and has a front plate portion 53a, an intermediate plate portion 53b, and a pair of upper and lower first mounting portions Aa. The front plate portion 53a is a portion that is placed on the first protruding piece portion 56a and fastened using a screw member 96. The intermediate plate portion 53b is a plate-like portion that extends from the front plate portion 53a toward the rear of the bracket 5. The pair of first mounting portions Aa are portions for mounting the bracket 5 to the first mounting target portion 43A of the stand 4 using a screw member 93, and have screw fastening recesses 59a that correspond to the screw member insertion holes 44a. is doing.

[0029] The fourth member 54 has a front plate portion 54a, an intermediate plate portion 54b, and a pair of upper and lower second mounting portions Ab, the basic configuration of which is similar to that of the front plate portion 53a, intermediate plate portion 53b, and first mounting portion Aa of the third member 53. The pair of upper and lower second mounting portions Ab are portions for mounting the bracket 5 to the second mounting target portion 43B of the rack 4 using screw members 94, and have screw fastening recesses 59b corresponding to the screw member insertion holes 44b. The portion of the bracket 5 that protrudes further to the left in FIG. 5 than the support portion 5C, i.e., the portion consisting of the first protruding piece portion 56a of the first and second members 51, 52 plus the third member 53, is the first extension portion 5A. In contrast, the portion of the bracket 5 that protrudes to the right side of the support portion 5C in FIG. 5, i.e., the portion consisting of the second protruding piece portion 56b of the first and second members 51, 52 plus the fourth member 54, is the second extension portion 5B.

[0030] The front plate 54a of the fourth member 54 has a larger horizontal width than the front plate 53a of the third member 53 (note that the second protruding piece 56b also has a larger horizontal width than the first protruding piece 56a). The front plate 54a is provided with inner and outer screw member insertion holes 57a, 57b spaced apart horizontally as screw member insertion holes for connecting with the second protruding piece 56b. 4 and 5, the front plate 54a is fastened to the second protruding piece 56b with a screw member 95 by utilizing the inner screw member insertion hole 57a. In contrast, in this bracket 5, as shown in FIG. 7, it is also possible to fasten the front plate 54a to the second protruding piece 56b with a screw member 95 by utilizing the outer screw member insertion hole 57b. In this way, by changing the mounting position of the front plate 54a of the fourth member 54, the overall horizontal dimension of the second extension portion 5B of the bracket 5 can be changed to dimensions L2 and L2'. As a result, the overall dimension of the bracket 5 can be changed in two stages, dimensions L and L'. On the other hand, the first extension portion 5A of the bracket 5 is configured so that the overall horizontal dimension cannot be changed.

[0031] Preferably, the bracket 5 is further provided with screw fastening holes 58 constituting the additional first and second mounting portions Aa', Ab'. Depending on the specifications of the stand 4, for example, as shown in Fig. 6, the supports 41a, 41b may have an inner wall portion 47, and this inner wall portion 47 may be provided with a screw member insertion hole 47a. When mounting the bracket 5 to such a portion, it is possible to appropriately mount the bracket 5 using the screw fastening holes 58 and the corresponding screw members 97.

[0032] Next, the operation of the pump unit device A (and the hot and cold water treatment system SY equipped with the same) will be described.

[0033] First, as shown in Figs. 1 and 5, the expansion tank 2 can be appropriately attached to the supports 41a, 41b of the stand 4 using a bracket 5. In this attachment, the first and second attachment parts Aa, Ab of the bracket 5 are screwed to the first and second attachment parts 43A, 43B of the supports 41a, 41b. This makes the attachment easy. The expansion tank 2 is clamped and held by the support part 5C of the bracket 5, so the attachment state is stable. The expansion tank 2 is disposed at a relatively low position below the pump unit 1, and the center of gravity can be made low, so the stability is further improved.

[0034] On the other hand, if the specifications of the stand 4 are changed, the distance between the first and second mounting portions 43A and 43B (the distance between the posts 41a and 41b) becomes shorter than that in the cases of FIGS. 4 and 5. In such a case, as shown in Fig. 7, by changing the attachment point of the fourth member 54 to the second protruding piece 56b, the overall horizontal dimension of the second extension portion 5B is shortened and set to a predetermined dimension corresponding to the above-mentioned change in specifications. This allows the expansion tank 2 to be appropriately attached to the frame 4 using the bracket 5.

[0035] In this embodiment, the operation of changing the length of the bracket 5 only needs to be performed on the second extension portion 5B side, and there is no need to perform any operation in the length direction on the first extension portion 5A side, which simplifies the operation of changing the length of the bracket 5. Also, the horizontal length dimension L1 of the first extension portion 5A is shorter than either of the length dimensions L2, L2' of the second extension portion 5B. Therefore, in this embodiment, in both the cases shown in Figs. 4 and 5 and the case shown in Fig. 7, the expansion tank 2 is closer to the first mounting target portion 43A (disposed biased toward the support 41a). Unlike this embodiment, if the first extension portion 5A of the bracket 5 has the same length as the second extension portion 5B and the expansion tank 2 is positioned at the center between the first and second mounting targets 43A, 43B, the expansion tank 2 is likely to shake, but according to this embodiment, this can be appropriately prevented and the expansion tank 2 can be made more stable.

[0036] FIG. 8 shows an example of a work process for assembling the bracket 5 so that the bracket 5 holds the expansion tank 2. As shown in the figure, the expansion tank 2 is inserted inside the clamp piece portion 55 of the first member 51, and then the second to fourth members 52 to 54 of the bracket 5 are sequentially assembled to the first member 51. Here, since the clamp piece portion 55 of the first member 51 has a flat wall portion 55a, when this flat wall portion 55a is placed on the work table 88, the first member 51 becomes stable. If the outer surface of the clamp piece portion 55 of the first member 51 is, for example, rounded and non-planar, the first member 51 becomes unstable on the work table 88, but according to this embodiment, it is possible to eliminate such a problem.

[0037] The present invention is not limited to the above-described embodiment, and the specific configuration of each part of the pump unit device according to the present invention can be freely designed and modified in various ways within the intended scope of the present invention.

[0038] In the above embodiment, the support column of the rack itself is the first and second mounting target parts for mounting the expansion tank, but this is not necessarily limited to this. Parts other than the support column of the rack may be the first and second mounting target parts. In the above-described embodiment, the bracket is capable of adjusting the length in two stages, but this is not limited thereto, and the length may be adjustable in more stages or continuously. The support portion of the bracket that supports the expansion tank may be formed in a manner other than the clamping method as long as it can support the expansion tank. The specific shapes, sizes, materials, etc. of the respective portions of the bracket are not limited to those of the above-described embodiment.

[0039] The specific use and manner of use of the pump unit device according to the present invention are not limited to the above-mentioned embodiment. For example, it is possible to combine a plurality of hot water supply devices with one pump unit device. In this case, it is possible to use a large-sized stand on which the plurality of hot water supply devices can be mounted. The specific types of expansion tank and pump are not limited.

[0040] In the above embodiment, of the first and second extensions of the bracket, only the second extension is changeable in overall length, but the present invention is not limited to this. In the present invention, it is sufficient that the overall length of at least one of the first and second extensions is changeable. The overall length of both the first and second extension portions may be changeable. [Explanation of symbols]

[0041] A Pump unit device Aa, Ab First and second mounting parts (bracket) P-Pump 1 Pump unit 10. Chassis 2. Expansion tank 4 Mounting 40 Base (stand) 41 (41a, 41b) Pillar (for mounting) 43A, 43B First and second mounting parts 5 Bracket 5A, 5B First and second extensions (of the bracket) 5C Support part (bracket) 55 Clamp piece

Claims

1. A pump unit having a pump disposed in a housing; an expansion tank connected to the pump unit through a pipe and disposed outside the housing; a stand for mounting the pump unit and the expansion tank; A pump unit device comprising: the frame is provided with first and second mounting targets arranged at a distance from each other in a horizontal direction as portions for mounting the expansion tank; a bracket for the expansion tank is provided as a means for mounting the expansion tank to the first and second mounting targets; This bracket is A support portion that supports the expansion tank; a first extension portion that protrudes horizontally from the support portion and has a first attachment portion for attachment to the first attachment target portion; a second extension portion protruding from the support portion in a horizontal direction opposite to the first extension portion and having a second attachment portion for attachment to the second attachment target portion; It is equipped with A pump unit device characterized in that at least one of the first and second extension portions is constructed by connecting a plurality of members, and the overall length dimension can be changed by changing the connection points of these plurality of members.

2. 2. The pump unit apparatus according to claim 1, A pump unit device in which the support portion of the bracket has a pair of clamp pieces that can be set in an opposing state to each other, and the expansion tank can be sandwiched and held between the pair of clamp pieces.

3. 2. The pump unit apparatus according to claim 1, A pump unit device, wherein of the first and second extension portions of the bracket, only the second extension portion is capable of changing its overall length, and the first extension portion is not capable of changing its overall length.

4. 4. The pump unit device according to claim 3, a total length dimension in a horizontal direction of the first extension portion is shorter than a total length dimension when the total length dimension in the horizontal direction of the second extension portion is set to be shortest, A pump unit device configured so that, when the expansion tank is attached to the frame, the expansion tank is positioned biased toward the first mounting target portion rather than the horizontal center between the first and second mounting target portions.

5. A pump unit device according to any one of claims 1 to 4, The platform includes a base portion that is placed on the ground or a floor, and at least two columns that rise upward from the base portion and are spaced apart in a horizontal direction; The pump unit is attached to a portion near the upper part of the two pillars, A pump unit device, wherein the first and second mounting targets are provided in areas of the two pillars below the pump unit.

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