Evaporative pattern for valve box

Abstract

To provide an evaporative pattern for a valve box allowed to suitably make a valve box having an accommodation unit allowed to receive a measuring instrument.SOLUTION: An evaporative pattern 1 for a valve box, to be arranged within a mold 4 and replaced with melt to thereby make a valve box 100, comprises: a valve-body forming portion 10 that corresponds to a valve-body unit 110 allowed to receive a valve body 2; a joint-forming portion 20 that corresponds to a joint 120; and an accommodation-unit forming portion 30 that is arranged between the valve-body forming portion 10 and the joint forming portion 20 and corresponds to an accommodation unit 130 allowed to receive a sensor 3.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technology of lost foam patterns for valve bodies. [Background technology]

[0002] Conventional methods for obtaining information about inside a pipeline (flow path) such as a water pipe include installing dedicated equipment such as a water quality monitor or flow meter midway through the flow path to obtain information permanently, or temporarily introducing various sensors into the flow path via existing fire hydrants, etc. to obtain information.

[0003] However, the former method requires relatively high installation costs and may require dedicated installation space, making it difficult to obtain information on a wide range of pipeline networks, while the latter method makes it possible to obtain information for a limited period and location, but it is difficult to obtain information on a wide range of pipeline networks permanently.

[0004] Here, valves for opening and closing the flow path of the fluid are appropriately provided in pipelines such as water pipes. A typical valve is the one described in Patent Document 1. Since many such valves are installed in a pipeline network, if information inside the flow path can be obtained using these valves, information about the pipeline network can be obtained over a wide area and permanently. For this reason, a valve capable of accommodating a measuring device for acquiring information inside the flow path is desired.

[0005] As a manufacturing method for a valve body constituting such a valve, a casting method using a lost foam is generally known. Therefore, a lost foam capable of suitably manufacturing a valve body having an accommodation portion capable of accommodating a measuring device is desired. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 6066722 Summary of the Invention [Problem to be solved by the invention]

[0007] One aspect of the present disclosure has been made in consideration of the above-described circumstances, and the problem to be solved is to provide a lost model for a valve box that can be used to suitably manufacture a valve box having a storage section capable of accommodating measuring equipment. [Means for solving the problem]

[0008] The problem to be solved by the present invention has been described above, and the means for solving this problem will now be described.

[0009] A lapsed die for a valve body according to one aspect of the present disclosure is a lapsed die for a valve body that is placed in a mold and can be replaced with molten metal to produce a valve body, the lapsed die comprising a valve body forming section corresponding to a valve body section capable of accommodating a valve body, a joint forming section corresponding to a joint, an accommodation section forming section that is placed between the valve body forming section and the joint forming section and corresponds to an accommodation section capable of accommodating a measuring instrument, It is equipped with the following. According to one aspect of the present disclosure, a valve body having a housing portion capable of housing a measuring device can be suitably manufactured.

[0010] The storage section forming section in one embodiment of the present disclosure comprises a flow path section forming section corresponding to a flow path section through which a fluid flows, a partition section forming section corresponding to a partition section separated from the flow path section, and a wall section forming section corresponding to a wall section separating the flow path section from the partition section, and the wall section forming section comprises a hole section communicating between the flow path section forming section and the partition section forming section. According to one aspect of the present disclosure, a valve body having a housing portion capable of housing a measuring device can be suitably manufactured.

[0011] In one embodiment of the present disclosure, the valve body forming portion, the joint forming portion, and the accommodating portion forming portion are joined to each other, and the joint forming portion has a joining surface that can be joined to both the valve body forming portion and the accommodating portion forming portion. According to one aspect of the present disclosure, the versatility of the efflorescence model can be improved. Effect of the Invention

[0012] According to one aspect of the present disclosure, a valve body having a housing portion capable of housing a measuring device can be suitably manufactured. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a perspective view of a lost-mold model for a valve body according to the first embodiment. [Diagram 2] Front view of the lost model. [Diagram 3] (a) Right side view of the lost model. (b) Left side view of the lost model. [Figure 4] Plan view of the lost model. [Diagram 5] Bottom view of the lost model. [Figure 6] (a) is a cross-sectional view taken along the line A1-A1 in FIG. 2. (b) is a cross-sectional view taken along the line B1-B1 in FIG. [Figure 7] 5 is a cross-sectional view taken along C1-C1 in FIG. 4. [Figure 8] FIG. 1 is a side cross-sectional view of a valve body manufactured using a lost foam pattern. [Figure 9] FIG. 13 is a side cross-sectional view that illustrates a process for manufacturing a valve body using the lost model. [Figure 10] FIG. 13 is a front view showing the disassembled lost model. [Figure 11] FIG. 11 is a perspective view of a lost-mold model for a valve body according to a second embodiment. [Figure 12] Front view of the lost model. [Figure 13] Right side view of the lost model. [Figure 14] Plan view of the lost model. [Figure 15] Bottom view of the lost model. [Figure 16] 12. (a) is a cross-sectional view taken along line A2-A2 in FIG. 12. (b) is a cross-sectional view taken along line B2-B2 in FIG. [Figure 17] 15 is a cross-sectional view taken along C2-C2 in FIG. 14 . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In the following description, the directions indicated by arrows U, D, F, and B in the drawings are defined as the upward direction, downward direction, forward direction, and backward direction, respectively.

[0015] Hereinafter, a description will be given of an evaporative model 1 for a valve body according to one embodiment of the present invention.

[0016] The evaporative model 1 is used to manufacture a valve box 100 used to manage water flowing through a water pipe. First, the valve box 100 will be described below.

[0017] The valve box 100 shown in Fig. 8 constitutes a valve device that controls the flow of water inside a water pipe. More specifically, the valve box 100 constitutes the valve device together with a valve body 2 that separates the water flow path and a sensor 3 that acquires information inside the water pipe. The valve box 100 is connected to the water pipe below a valve box (not shown) installed underground. The valve box 100 forms a water flow path that extends in the left-right direction. The valve box 100 is manufactured by casting. A detailed description of the manufacturing method of the valve box 100 will be given later.

[0018] The valve box 100 includes a valve body 110, a joint 120, and a housing portion 130. For ease of explanation, the boundaries between the various portions of the valve box 100 are indicated by two-dot chain lines in Fig. 8. As will be described later, the valve box 100 has roughly the same shape as the efflorescent model 1.

[0019] The valve main body 110 constitutes the valve of the valve device together with the valve element 2. As the valve, for example, a gate valve (e.g., a soft seal gate valve) that closes by dividing a flow path (flow path portion 111 described later) of the valve main body 110 can be used. The valve main body 110 constitutes a left-right direction middle portion of the valve box 100. The valve main body 110 includes a flow path portion 111 and a valve element accommodating portion 112.

[0020] The flow path portion 111 is a portion that forms a flow path through which water flows in the valve main body portion 110. The flow path portion 111 constitutes a lower portion of the valve main body portion 110. The flow path portion 111 is formed in a substantially cylindrical shape that defines a hollow portion (portion that becomes a flow path) that penetrates the valve main body portion 110 from left to right.

[0021] The valve body accommodating portion 112 is a portion in which the valve body 2 is accommodated. The valve body accommodating portion 112 constitutes the upper portion of the valve main body portion 110. The valve body accommodating portion 112 is formed in a shape capable of accommodating the valve body 2. The valve body accommodating portion 112 communicates with the flow path portion 111 via an opening 112a formed in the lower end portion. The opening 112a is formed so that the valve body 2 can be inserted therethrough.

[0022] The joint 120 is a part that is connected to a water pipe. The joint 120 is formed in a substantially cylindrical shape that extends in the left-right direction. The joint 120 constitutes both ends of the valve box 100 in the left-right direction.

[0023] The accommodation section 130 is a portion capable of accommodating a measuring device for measuring the inside of the water pipe. In this embodiment, a sensor 3 capable of acquiring information on the inside of the flow path (flow path section 131 described later) of the valve box 100 is adopted as the measuring device. As the sensor 3, a flow velocity sensor capable of measuring the flow velocity of water flowing through the flow path, or a water quality sensor capable of measuring the quality of water can be adopted. Note that the sensor 3 is not limited to the above-mentioned example, and various sensors capable of acquiring information on the inside of the flow path can be adopted. Furthermore, the device that can be accommodated in the accommodation section 130 is not limited to the sensor 3, and various devices such as a camera capable of photographing the inside of the flow path, a communication device, and a battery can be adopted.

[0024] The accommodation section 130 is a left-right middle section of the valve box 100, and constitutes a section to the right of the valve main body 110 (a section between the valve main body 110 and the right-end joint 120). The accommodation section 130 includes a flow path section 131 and an equipment accommodation section 132.

[0025] The flow path section 131 is a portion that forms a flow path through which water flows in the storage section 130. The flow path section 131 constitutes a lower portion of the storage section 130. The flow path section 131 is formed in a substantially cylindrical shape that defines a hollow portion (portion that becomes a flow path) that penetrates the storage section 130 from left to right.

[0026] The device accommodating section 132 is a section that accommodates the sensor 3 (measuring device) and forms a space partitioned from the flow path section 131. The device accommodating section 132 constitutes the upper part of the accommodating section 130. The device accommodating section 132 is formed in a shape that can accommodate the sensor 3. The device accommodating section 132 includes a partition section 133 and a wall section 134.

[0027] The partition 133 is a portion that constitutes a side wall that horizontally partitions the space in which the sensor 3 is housed.

[0028] The wall portion 134 is a portion that constitutes the bottom portion that vertically divides the space in which the sensor 3 is housed. The wall portion 134 also constitutes the upper portion of the flow path portion 131. In other words, the wall portion 134 serves both as the bottom portion of the device housing portion 132 and the upper portion of the flow path portion 131. The wall portion 134 divides the flow path portion 131 and the partition portion 133 (the interior of the partition portion 133). The wall portion 134 is provided with an insertion hole 134a.

[0029] The insertion hole 134a is a hole that penetrates the wall portion 134 in the vertical direction. The insertion hole 134a is formed in the approximate center of the wall portion 134 in a plan view. The insertion hole 134a communicates between the flow path portion 131 and the partition portion 133. As shown in FIG. 8, the sensor 3 (measurement device) is inserted into the insertion hole 134a. The inner diameter of the insertion hole 134a is formed larger than the outer diameter of various measurement devices so as to be compatible with various measurement devices including the sensor 3. An intermediate part (not shown) that fills the gap is provided between the outer diameter of the sensor 3 and the inner diameter of the insertion hole 134a. As the intermediate part, for example, a holder of the sensor 3 formed in a cylindrical shape can be adopted.

[0030] 8, the flow path portion 111, the flow path portion 131, and the left and right joints 120 of the valve box 100 communicate with each other and form a flow path extending in the left-right direction. The valve device constituted by the valve box 100 can obtain information on the water flowing through the flow path by dividing the flow path with the valve element 2 of the valve main body 110 and by using the sensor 3 of the storage part 130.

[0031] In this embodiment, the valve box 100 is manufactured by a casting method using an evaporative pattern 1 having a shape corresponding to the valve box 100. Hereinafter, the casting method using the evaporative pattern 1 will be described with reference to FIG.

[0032] First, the evaporative pattern 1 is placed in the mold 4 so as to be embedded in sand (molding sand), and the gaps are filled with molding sand by applying vibration and reducing pressure. In the example shown in the figure, the molding sand is shown to be filled in. Next, molten metal (not shown) is supplied into the mold 4. As a result, the evaporative pattern 1 is replaced with the molten metal to form the valve body 100. After the valve body 100 is removed from the mold 4, appropriate surface treatment is performed on the casting surface, and processing such as drilling is performed. According to the above manufacturing method, the valve body 100 including the valve main body 110, the joint 120, and the housing 130 can be integrally molded by casting.

[0033] The following describes problems that may occur when casting using the lost foam as described above.

[0034] In a casting method using a general lost foam pattern, the lost foam pattern may be deformed by the sand pressure due to vibration filling of the casting sand into the casting flask and the reduced pressure. Here, when manufacturing the valve box 100 having the accommodation section 130 as in the present embodiment, a portion that divides the flow passage section 131 side and the partition section 133 side, that is, a portion corresponding to the wall section 134, is formed in the lost foam pattern. In addition, in casting, casting defects such as shrinkage cavities and poor molten metal flow are likely to occur in thin parts of the casting or parts where the runner is discontinuous, so that drilling is generally performed after casting to stabilize the casting quality. For this reason, in a general casting method, the insertion hole 134a of the wall section 134, which is a relatively thin part, is formed by drilling (cutting) or the like after casting. In this case, the portion corresponding to the wall section 134 of the lost foam pattern is formed into a wall shape without a hole.

[0035] When the defunct model as described above is embedded in casting sand, the casting sand is not filled in the portion corresponding to the wall portion 134 of the defunct model, and the casting sand around the above portion is discontinuous between the flow path portion 131 side and the partition portion 133 side. This makes the above portion susceptible to deformation, cracks, and the like due to vibration filling of the casting sand and sand pressure due to reduced pressure. Note that the above-mentioned deformation can occur in both cases, when the defunct model is arranged with its longitudinal direction (flow direction) facing up and down (vertical orientation) (see FIG. 9) and when the defunct model is arranged with its longitudinal direction facing horizontally (sideways).

[0036] The evaporative model 1 according to this embodiment can prevent the above-mentioned deformation, cracking, and the like, and can suitably manufacture the valve box 100 having the accommodation portion 130. The evaporative model 1 will be described below with reference to Figs. 1 to 7 and 10.

[0037] The evaporative model 1 is a model for manufacturing the valve body 100 by replacing the molten metal during casting. The evaporative model 1 is formed to have approximately the same size and shape as the valve body 100. The evaporative model 1 is formed, for example, from polystyrene foam. The evaporative model 1 includes a valve body forming portion 10, a joint forming portion 20, and a housing portion forming portion 30.

[0038] As shown in Fig. 10, each part of the evaporative model 1 (the valve body forming part 10, the joint forming part 20, and the storage part forming part 30) is formed separately from one another. The evaporative model 1 is formed by joining each of the above-mentioned parts to one another with an adhesive or the like.

[0039] The valve body forming portion 10 is a portion corresponding to the valve body portion 110 of the valve box 100. In other words, the valve body forming portion 10 constitutes a left-right direction middle portion of the efflorescent model 1. The valve body forming portion 10 includes a flow path portion forming portion 11, a valve body accommodating portion forming portion 12, and a joint surface 13.

[0040] 6(b) and 7 is a portion corresponding to the flow path portion 111 of the valve body portion 110. That is, the flow path portion forming portion 11 constitutes the lower portion of the valve body forming portion 10, and is formed in a substantially cylindrical shape that defines a hollow portion (portion that becomes a flow path) that penetrates the valve body forming portion 10 from left to right.

[0041] The valve body accommodating portion forming portion 12 is a portion corresponding to the valve body accommodating portion 112 of the valve main body portion 110. In other words, the valve body accommodating portion forming portion 12 constitutes the upper portion of the valve main body forming portion 10. As shown in Figs. 1, 6(b) and 7, the valve body accommodating portion forming portion 12 is formed in a substantially box shape that opens upward. Also, as shown in Figs. 1 and 4, the valve body accommodating portion forming portion 12 is formed in a substantially rectangular shape in a plan view.

[0042] A flange extending in the horizontal direction is formed at the upper end of the valve body accommodating portion forming portion 12. In addition, as shown in Fig. 7, an opening 12a that corresponds to the opening 112a of the valve body accommodating portion 112 and communicates with the flow path portion forming portion 11 is formed at the lower end of the valve body accommodating portion forming portion 12.

[0043] 10 is a surface that is joined to the joining objects (the joint forming portion 20 and the accommodation portion forming portion 30) of the valve body forming portion 10. The joining surfaces 13 form both left and right side surfaces of the valve body forming portion 10. The left and right joining surfaces 13 are formed to have the same shape.

[0044] The joint forming portion 20 shown in FIG. 1 corresponds to the joint 120 of the valve box 100. That is, the joint forming portion 20 constitutes both left and right ends of the efflorescent model 1. The left and right joint forming portions 20 are formed in the same shape. The joint forming portion 20 is formed in a substantially cylindrical shape extending in the left and right direction. The tip of the joint forming portion 20 in the extending direction is provided with a flange having an expanded diameter relative to other portions. As shown in FIG. 7 and FIG. 10, the left joint forming portion 20 is connected to the flow path portion forming portion 11 of the valve body forming portion 10. Also, the right joint forming portion 20 is connected to the flow path portion forming portion 31 of the accommodation portion forming portion 30 described later. The joint forming portion 20 has a joining surface 21.

[0045] 10 is a surface that is joined to the joint objects of the joint forming part 20 (the valve body forming part 10 and the joint forming part 20). In this embodiment, the joint surface 21 of the left joint forming part 20 is joined to the left joint surface 13 of the valve body forming part 10. Moreover, the joint surface 21 of the right joint forming part 20 is joined to a first joint surface 35 of the accommodation part forming part 30, which will be described later. In this manner, the joint surface 21 of the joint forming part 20 is formed so as to be joinable to both the valve body forming part 10 and the accommodation part forming part 30.

[0046] The accommodating section forming section 30 is a section corresponding to the accommodating section 130 of the valve box 100. In other words, the accommodating section forming section 30 is a left-right middle section of the efflorescent model 1, and constitutes a section to the right of the valve body forming section 10 (a section between the valve body forming section 10 and the joint forming section 20 at the right end). The accommodating section forming section 30 includes a flow path section forming section 31, an equipment accommodating section forming section 32, a first joint surface 35, and a second joint surface 36.

[0047] 6(a) and 7 is a portion corresponding to the flow path portion 131 of the storage portion 130. That is, the flow path portion forming portion 31 constitutes a lower portion of the storage portion forming portion 30, and is formed in a substantially cylindrical shape that defines a hollow portion (flow path) that penetrates the storage portion forming portion 30 from left to right.

[0048] The equipment accommodating section forming section 32 is a portion corresponding to the equipment accommodating section 132 of the accommodation section 130. That is, the equipment accommodating section forming section 32 constitutes the upper portion of the accommodation section forming section 30. As shown in Figs. 1, 6(a) and 7, the equipment accommodating section forming section 32 is formed in a substantially box shape that opens upward. Also, as shown in Figs. 1 and 4, the equipment accommodating section forming section 32 is formed in a substantially rectangular shape in a plan view. The left-right dimensions and front-rear dimensions of the equipment accommodating section forming section 32 are formed to be larger than the respective dimensions of the valve body accommodating section forming section 12. The equipment accommodating section forming section 32 includes a partition section forming section 33 and a wall section forming section 34.

[0049] The partitioning portion forming portion 33 is a portion corresponding to the partitioning portion 133 of the equipment accommodating portion 132. The partitioning portion forming portion 33 constitutes a side wall of the equipment accommodating portion forming portion 32. As shown in Fig. 1, a flange portion extending in the horizontal direction is formed at the upper end portion of the partitioning portion forming portion 33.

[0050] The wall forming portion 34 is a portion corresponding to the wall portion 134 of the equipment accommodating portion 132. The wall forming portion 34 constitutes the bottom portion of the equipment accommodating portion forming portion 32. The wall forming portion 34 also separates the flow path portion forming portion 31 from the partition portion forming portion 33 (the interior of the partition portion forming portion 33). The wall forming portion 34 is provided with a hole portion 34a.

[0051] The hole 34a is a hole that penetrates the wall forming portion 34 in the up-down direction. The hole 34a is formed approximately in the center of the wall forming portion 34 in a plan view. The hole 34a communicates between the flow path portion forming portion 31 and the partition portion forming portion 33. The hole 34a is formed at a position corresponding to the insertion hole 134a of the wall portion 134. The inner diameter of the hole 34a can be formed to be smaller than the inner diameter of the insertion hole 134a (see FIG. 8).

[0052] As shown in Fig. 9, by forming the hole 34a in the wall forming portion 34, when the evaporative pattern 1 is embedded in casting sand, the casting sand on the flow path forming portion 31 side and the partition forming portion 33 side can be connected via the hole 34a. Furthermore, when casting is performed using the evaporative pattern 1, a hole (cast-out hole) corresponding to the hole 34a is formed in the wall 134 of the valve box 100 immediately after casting. In this embodiment, the insertion hole 134a can be formed by utilizing the hole. Specifically, the insertion hole 134a can be formed by performing a process such as cutting on the hole corresponding to the hole 34a.

[0053] 10 is a surface that is joined to the joining surface 21 of the joint forming part 20. In this embodiment, the accommodation part forming part 30 is disposed so that the first joining surface 35 faces rightward.

[0054] The second joint surface 36 is a surface that is joined to the joint surface 13 of the valve body forming part 10. In this embodiment, the storage part forming part 30 is disposed so that the second joint surface 36 faces leftward.

[0055] The efflorescent model 1 is formed into a shape corresponding to the valve box 100 by joining (gluing) each of the joint surfaces (joint surface 13, joint surface 21, first joint surface 35 and second joint surface 36) of the valve body forming portion 10, the joint forming portion 20 and the accommodating portion forming portion 30 together to integrate the respective parts.

[0056] According to the efflorescent model 1 as described above, it is possible to suitably manufacture the valve box 100 having the accommodation portion 130. That is, if the hole 34a is not formed in the wall forming portion 34, the molding sand around the wall forming portion 34 would be discontinuous between the flow path forming portion 31 side and the partition forming portion 33 side, and deformation, cracks, and the like would be easily generated due to vibration filling of the molding sand or sand pressure due to reduced pressure.

[0057] On the other hand, in the evaporative model 1 according to this embodiment, by forming the hole 34a in the wall forming portion 34, the casting sand on the flow path forming portion 31 side and the partition forming portion 33 side are continuous through the hole 34a. This makes it possible to prevent deformation, cracking, etc. of the evaporative model 1 (particularly the peripheral portion of the wall forming portion 34 surrounded by the dashed line in FIG. 9) due to sand pressure. Also, in this embodiment, by utilizing the hole of the wall portion 134 formed by providing the hole 34a in the evaporative model 1, an insertion hole 134a through which the sensor 3 can be inserted can be formed.

[0058] In addition, in this embodiment, the joining surface 21 of the joint forming portion 20 is formed so as to be joinable to both the valve body forming portion 10 and the storage portion forming portion 30. This can improve the versatility of the efflorescent model 1 (the valve body forming portion 10, the joint forming portion 20, and the storage portion forming portion 30). Specifically, since the joint forming portion 20 can be joined to both the valve body forming portion 10 and the storage portion forming portion 30, it is also possible to form an efflorescent model capable of manufacturing a valve box 100 without a storage portion 130 by directly joining the joint forming portion 20 to both the left and right sides of the valve body forming portion 10 without using the storage portion forming portion 30, for example.

[0059] Although the first embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0060] A second embodiment of the present invention will be described below with reference to Fig. 11 to Fig. 17. In the following description of the second embodiment, differences from the first embodiment will be described, and descriptions of common configurations will be omitted as appropriate.

[0061] The efflorescent model 1A according to the second embodiment differs from the efflorescent model 1 according to the first embodiment in that it has two accommodation portion forming portions 30. As shown in Figs. 11, 12, 14, 15 and 17, the efflorescent model 1A has an accommodation portion forming portion 30 on each of the left and right sides of the valve body forming portion 10. The pair of accommodation portion forming portions 30 are arranged symmetrically with respect to each other. In addition, the pair of accommodation portion forming portions 30 each have a joint forming portion 20.

[0062] The efflorescent model 1A can be formed by combining parts similar to those constituting the efflorescent model 1 of the first embodiment shown in FIG. 10 (the valve body forming part 10, the joint forming part 20, and the storage part forming part 30). Specifically, the second joint surface 36 of the storage part forming part 30 is joined to the joint surface 13 on both the left and right sides of the valve body forming part 10. Also, the joint surface 21 of the joint forming part 20 is joined to the first joint surface 35 of the pair of storage part forming parts 30. In this way, according to this embodiment, the efflorescent model 1A having a pair of storage part forming parts 30 can be formed using the parts common to the efflorescent model 1 (the valve body forming part 10, the joint forming part 20, and the storage part forming part 30), and the versatility of each part can be improved.

[0063] As shown in FIG. 17, in this embodiment, by forming a hole portion 34a in each wall forming portion 34 of a pair of housing portion forming portions 30, it is possible to prevent deformation, cracking, and the like of the lost pattern 1A due to sand pressure during casting, similarly to the first embodiment.

[0064] According to the above-mentioned efflorescent model 1A, a valve box having (a pair of) accommodation sections 130 on both the left and right sides of the valve main body 110 can be integrally molded by casting. According to the above-mentioned valve box, a measuring device (such as the sensor 3) can be accommodated in each of the pair of accommodation sections 130. This makes it possible to, for example, provide the same type of measuring device in each accommodation section 130 and obtain information on the upstream and downstream sides of the valve body 2 (such as pressure and camera images). Also, for example, it is possible to provide a plurality of different measuring devices in each accommodation section 130 and obtain a plurality of different types of information (such as flow rate and water quality).

[0065] As described above, the lost-mold model 1, 1A for the valve body according to the present embodiment has the following features: A lost model 1, 1A for a valve body that is placed in a mold 4 and can be replaced with molten metal to manufacture a valve body 100, a valve body forming portion 10 corresponding to a valve body portion 110 capable of accommodating a valve body 2; A joint forming portion 20 corresponding to the joint 120; a housing portion forming portion 30 that is disposed between the valve body forming portion 10 and the joint forming portion 20 and corresponds to a housing portion 130 that can house a measuring device (sensor 3); It is equipped with the following.

[0066] This configuration makes it possible to suitably manufacture the valve box 100 having the accommodation portion 130 capable of accommodating the sensor 3. Specifically, by using the efflorescent patterns 1, 1A, the valve box 100 having the valve main body 110, the joint 120, and the accommodation portion 130 can be integrally manufactured by casting.

[0067] In addition, the storage portion forming portion 30 is a flow path portion forming portion 31 corresponding to a flow path portion 131 through which a fluid (water) flows; a partition portion forming portion 33 corresponding to a partition portion 133 partitioned from the flow path portion 131; a wall forming portion 34 corresponding to a wall portion 134 that divides the flow path portion 131 and the partition portion 133; Equipped with The wall forming portion 34 is The passage portion forming portion 31 and the partition portion forming portion 33 are provided with a hole portion 34 a that communicates with each other.

[0068] With this configuration, it is possible to suitably manufacture the valve box 100 having the accommodation portion 130 capable of accommodating the sensor 3. Specifically, by forming the hole 34a in the wall portion forming portion 34, the casting sand on the flow path portion forming portion 31 side and the partition portion forming portion 33 side are continuous through the hole 34a. This makes it possible to prevent deformation, cracking, etc. of the efflorescent model 1, 1A (especially the area around the wall portion forming portion 34) due to sand pressure.

[0069] In addition, the valve body forming portion 10, the joint forming portion 20, and the storage portion forming portion 30 are joined to each other, The joint forming portion 20 is It has a joining surface 21 which can be joined to both the valve body forming portion 10 and the container portion forming portion 30 .

[0070] By configuring in this manner, it is possible to improve the versatility of the efflorescent model 1, 1A (the valve body forming part 10, the joint forming part 20, and the storage part forming part 30). Specifically, since the joint forming part 20 can be joined to both the valve body forming part 10 and the storage part forming part 30, it is also possible to form a efflorescent model from which a valve box without a storage part 130 can be manufactured by directly joining the joint forming part 20 to both the left and right sides of the valve body forming part 10 without using the storage part forming part 30, for example.

[0071] Furthermore, according to this embodiment, the valve body forming portion 10, the joint forming portion 20, and the receiving portion forming portion 30 can be used to form the efflorescent model 1A having a pair of receiving portion forming portions 30.

[0072] The sensor 3 according to this embodiment is one embodiment of a measuring device according to the present invention.

[0073] Although each embodiment of the present invention has been described above, the present invention is not limited to the above configurations, and various modifications are possible within the scope of the invention described in the claims.

[0074] For example, the specific configurations of each part of the efflorescent model 1, 1A (valve body forming part 10, joint forming part 20 and storage part forming part 30) shown in each of the above embodiments are merely examples, and the shapes, etc. of each of the above parts can be changed as desired.

[0075] In addition, in each of the above embodiments, the elimination model 1 having one container portion forming portion 30 and the elimination model 1A having two container portion forming portions 30 are shown, but the present invention is not limited to this. The number of each part constituting the elimination model 1 can be set appropriately.

[0076] In addition, in each of the above embodiments, the efflorescent model 1, 1A is formed by joining the valve body forming portion 10, the joint forming portion 20, and the storage portion forming portion 30, which are formed separately from each other, but the present invention is not limited to this. For example, each portion of the efflorescent model 1, 1A may be integrally formed.

[0077] In addition, in each of the above embodiments, an example has been shown in which the measuring device is directly accommodated in the accommodation section 130 of the valve box 100, but the present invention is not limited to this. For example, a water intake device capable of taking in water flowing through the flow path section 131 may be provided in the accommodation section 130, and the measuring device disposed outside the accommodation section 130 may be connected to the water intake device, thereby indirectly accommodating the measuring device in the accommodation section 130.

[0078] In addition, in each of the above embodiments, the valve box 100 (valve device) is connected to a water pipe, but the application of the valve box 100 (valve device) is not limited to water pipes and can be applied to various facilities. Furthermore, the fluid flowing through the valve box 100 is not limited to water and various fluids can be applied. [Explanation of symbols]

[0079] 1 Vanishing model 10 Valve body forming section 20 Joint forming section 30 Container forming section

Claims

1. A lost form model for a valve body that is placed in a mold and can be used to manufacture a valve body by replacing the molten metal, a valve body forming portion corresponding to a valve body portion capable of accommodating a valve body; a joint forming portion corresponding to the joint; a housing portion forming portion disposed between the valve body forming portion and the joint forming portion and corresponding to a housing portion capable of housing a measuring device; A loss model for a valve body equipped with

2. The container forming portion is a flow path portion forming portion corresponding to a flow path portion through which a fluid flows; a partition forming portion corresponding to a partition portion that is partitioned from the flow path portion; a wall forming portion corresponding to a wall portion that divides the flow path portion and the partition portion; Equipped with The wall forming portion is The flow path forming portion and the partition forming portion are provided with a hole portion. The lost form pattern for a valve body according to claim 1.

3. the valve body forming portion, the joint forming portion, and the accommodation portion forming portion are joined to each other, The joint forming portion is The valve body forming portion and the accommodation portion forming portion have a joining surface that can be joined to each other. The lost foam pattern for a valve body according to claim 1 or 2.

Images