Injection molding structure of flowmeter main body

Abstract

The utility model relates to the field of flow meters, in particular to a flow meter body injection molding structure which comprises a body, a first channel, a second channel and a connecting channel are formed in the body, the first channel and the second channel are both communicated with the connecting channel, and the first channel and the second channel are located on the two sides of the connecting channel respectively; a receding groove is formed in the peripheral face of the body, and the inner wall, away from a notch of the receding groove, of the receding groove is close to the inner wall of the connecting channel. The flow meter has the advantages that the flow meter is not prone to deformation during injection molding, and therefore the detection precision of the flow meter is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of flow meters, and in particular to an injection molding structure of a flow meter body. Background Art

[0002] A flow meter is a detection device used to measure the flow rate of a fluid in a pipeline. It usually includes a main body and a detector. The main body is integrally injection molded with a fluid channel, and the fluid channel runs through the main body. The detector is used to detect the flow rate of the fluid flowing through the flow meter through the fluid channel, and the detector is installed on the top of the main body.

[0003] In the existing related technology, the fluid channel includes a joint channel, a first channel, a second channel and a connecting channel; there are two joint channels, one of which is connected to the first channel and has an inner diameter larger than the inner diameter of the first channel, and the other joint channel is connected to the second channel and has an inner diameter larger than the inner diameter of the second channel;

[0004] The first channel and the second channel are both connected to the connecting channel, and the inner diameters of the first channel and the second channel are both larger than the inner diameter of the connecting channel, that is, there are differences in the inner diameters of various parts of the fluid channel, so as to ensure the detection accuracy of the detector through the throttling effect of the connecting channel.

[0005] In the above-mentioned related technologies, the fluid channel is integrally injection molded into the main body, and the inner diameters of the fluid channel vary, resulting in a large difference in the wall thickness between the outer circumference of the main body and the inner wall of the fluid channel. During the multi-stage cylinder injection molding and cooling, the main body is prone to obvious uneven shrinkage due to uneven heat dissipation, which in turn causes deviations in the inner diameters of the fluid channel, affecting the detection accuracy of the flow meter. Summary of the invention

[0006] In order to prevent the flowmeter from being easily deformed during injection molding, thereby ensuring the detection accuracy of the flowmeter, the present application provides a flowmeter main body injection molding structure.

[0007] The present application provides a flow meter main body injection molding structure adopts the following technical solution:

[0008] A flow meter body injection molding structure includes a body, wherein a first channel, a second channel and a connecting channel are opened inside the body, the first channel and the second channel are both connected to the connecting channel, and the first channel and the second channel are respectively located on both sides of the connecting channel; a clearance groove is opened on the outer peripheral surface of the body, and the clearance groove is arranged away from the inner wall of its own notch and close to the inner wall of the connecting channel.

[0009] By adopting the above technical solution, the clearance groove reduces the wall thickness between the outer peripheral surface of the main body and the inner wall of the connecting channel, so that when the multi-section cylinder is injection molded and cooled, the main body is not easy to shrink unevenly due to uneven heat dissipation, and the flow meter is not easy to deform during injection molding, thereby ensuring the detection accuracy of the flow meter. In addition, by setting the clearance groove, the material consumed during injection molding of the main body is reduced, reducing the material cost.

[0010] Optionally, a lining plate is provided in the clearance groove, and the lining plate is integrally connected to the inner wall of the clearance groove.

[0011] By adopting the above technical solution, the lining plate ensures the structural stability of the clearance groove, so that when the detector is installed on the main body, the clearance groove is not easily deformed, thereby ensuring the product quality of the detector.

[0012] Optionally, the main body includes a main body shell and a multi-section cylinder, the multi-section cylinder is integrally connected to the main body shell, the first channel, the second channel and the connecting channel are all opened in the multi-section cylinder, and a molding cavity is opened at the bottom of the main body shell, and the molding cavity is arranged away from the inner wall of its own groove and close to the outer peripheral surface of the multi-section cylinder.

[0013] By adopting the above technical solution, the molding cavity reduces the thickness of the main shell and the thickness of the multi-section cylinder, so that when the multi-section cylinder is injection molded and cooled, the multi-section cylinder is not easy to shrink unevenly due to uneven heat dissipation, and the flow meter is not easy to deform during injection molding, thereby ensuring the detection accuracy of the flow meter.

[0014] Optionally, the clearance groove is provided on the outer peripheral surface of the main body shell, and the clearance groove is isolated from the molding cavity by a horizontal fixing plate, and two sides of the horizontal fixing plate are respectively integrally connected to the main body shell and the multi-section cylinder.

[0015] By adopting the above technical solution, the clearance groove and the molding cavity together reduce the thickness of the main shell and the thickness of the multi-segment cylinder, effectively controlling the deformation of the multi-segment cylinder during injection molding and cooling. At the same time, the horizontal fixing plate increases the stability of the connection between the main shell and the multi-segment cylinder, making it difficult for the clearance groove and the molding cavity to deform due to excessive volume.

[0016] Optionally, the multi-section cylinder is integrally connected with a first transverse fixing plate, and both sides of the first transverse fixing plate are integrally connected to the inner wall of the molding cavity.

[0017] By adopting the above technical solution, the first transverse fixing plate increases the structural stability of the inner wall of the molding cavity, so that the molding cavity is not easily deformed due to excessive volume.

[0018] Optionally, the multi-section cylinder is further provided with a joint channel;

[0019] The joint channel is connected to the first channel or the second channel, and the inner diameter of the joint channel is larger than the inner diameter of the first channel or the second channel;

[0020] The first transverse fixing plate is arranged at the bottom of the first channel or the second channel and is arranged close to the joint channel.

[0021] By adopting the above technical solution, the first transverse fixing plate increases the stability of the connection between the first channel and the joint channel or between the second channel and the joint channel, so that the connection between the first channel and the joint channel and between the second channel and the joint channel is not easily deformed due to a sudden change in cross section, that is, a sudden change in the inner diameter size.

[0022] Optionally, the multi-section cylinder is integrally connected with a second transverse fixing plate, the second transverse fixing plate is arranged at the bottom of the first channel or the second channel and close to the connecting channel, and both sides of the second transverse fixing plate are integrally connected to the inner wall of the molding cavity.

[0023] By adopting the above technical solution, the second transverse fixing plate increases the stability of the connection between the first channel and the connecting channel or between the second channel and the connecting channel, so that the connection between the first channel and the connecting channel and between the second channel and the connecting channel is not easily deformed due to a sudden change in cross section, that is, a sudden change in the inner diameter size.

[0024] Optionally, a plurality of second transverse fixing plates are provided, and the axes of the plurality of second transverse fixing plates are all arranged perpendicular to the axis of the connecting channel;

[0025] The plurality of second transverse fixing plates are divided into two groups, wherein one group of the second transverse fixing plates is arranged between the first channel and the connecting channel, and the other group of the second transverse fixing plates is arranged between the second channel and the connecting channel;

[0026] The multi-section cylinder is integrally connected with a longitudinal fixing plate, the longitudinal fixing plate is arranged between the two groups of second transverse fixing plates, and the two ends of the longitudinal fixing plate are respectively and vertically integrally connected to the two groups of second transverse fixing plates.

[0027] By adopting the above technical solution, the longitudinal fixing plate increases the stability of the connection between the two groups of second transverse fixing plates, which is beneficial to reduce the occurrence of bending of the two groups of second transverse fixing plates during cooling and forming.

[0028] Optionally, a detector is also included, which includes a substrate and a detection element, the substrate is mounted on the main body by bolts, the detection element is mounted on the substrate, and the detection element is used to detect the flow rate of the fluid flowing through the flow meter; a limiting hole is penetrated through the substrate, and the main body is provided with a pin, which is inserted into and penetrated through the limiting hole.

[0029] By adopting the above technical solution, when the base plate is installed on the main body by bolts, the pins are inserted into the limiting holes, so that the base plate is not easily displaced due to the rotation of the bolts, thereby ensuring that the detection element detects the specified position, thereby ensuring the detection accuracy and improving the installation efficiency and installation accuracy of the base plate.

[0030] Optionally, the inner wall of the first channel is integrally connected with a first boss, and the first boss is provided with a first sensor channel; the inner wall of the second channel is integrally connected with a second boss, and the second boss is provided with a second sensor channel, and the first sensor channel is connected with the second sensor channel;

[0031] The flow meter main body injection molding structure further includes a detector, which is used to detect the flow rate of the fluid flowing through the first sensor channel and the second sensor channel.

[0032] By adopting the above technical solution, the first boss and the second boss make it difficult for impurities mixed with the fluid to enter the first sensor channel and the second sensor channel, thereby making it difficult for the detector to accurately detect the flow rate due to the influence of the impurities. In addition, the first boss and the second boss are less difficult to be injected than the case where the annular protrusion is provided, which is conducive to ensuring the injection molding quality and demolding difficulty.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The clearance groove reduces the wall thickness between the outer surface of the main body and the inner wall of the connecting channel, so that when the multi-section cylinder is injection molded and cooled, the main body is not easy to shrink unevenly due to uneven heat dissipation, and the flow meter is not easy to deform during injection molding, thereby ensuring the detection accuracy of the flow meter. In addition, by setting the clearance groove, the material consumption during injection molding of the main body is reduced, reducing the material cost.

[0035] 2. The lining plate ensures the structural stability of the clearance groove, so that when the detector is installed on the main body, the clearance groove is not easily deformed, thereby ensuring the product quality of the detector.

[0036] 3. The molding cavity reduces the thickness of the main shell and the thickness of the multi-section cylinder, so that when the multi-section cylinder is injection molded and cooled, the multi-section cylinder is not easy to shrink unevenly due to uneven heat dissipation, and the flow meter is not easy to deform during injection molding, thereby ensuring the detection accuracy of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a cross-sectional schematic diagram of the overall structure of the embodiment of the present application.

[0038] Figure 2 It is an overall schematic diagram of the main body of the embodiment of the present application.

[0039] Figure 3 It is an overall schematic diagram of the molding cavity of an embodiment of the present application.

[0040] Figure 4 It is an overall schematic diagram of the fixing plate in the embodiment of the present application.

[0041] Explanation of the reference numerals: 1. main body; 101. first channel; 102. second channel; 103. connecting channel; 104. joint channel; 11. main body shell; 111. make way groove; 112. lining plate; 113. molding cavity; 12. multi-section cylinder; 121. first boss; 122. first sensor channel; 123. second boss; 124. second sensor channel; 125. detection introduction channel; 126. placement surface; 2. detector; 21. substrate; 22. detection element; 3. horizontal fixing plate; 4. first transverse fixing plate; 5. second transverse fixing plate; 6. longitudinal fixing plate; 7. upper fixing plate; 701. threaded hole; 702. sealing groove; 71. pin; 72. sealing ring. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-4 This application is described in further detail.

[0043] The embodiment of the present application discloses an injection molding structure of a flow meter body 1. Figure 1 The injection molding structure of the flow meter body 1 includes a body 1 and a detector 2.

[0044] Reference Figure 1 The main body 1 includes a main body shell 11 and a multi-section cylinder 12; the main body shell 11 is arranged in a rectangular parallelepiped shape, and the multi-section cylinder 12 is arranged inside the main body shell 11, and the two ends of the multi-section cylinder 12 are respectively connected to the two ends of the main body shell 11 as a whole, and a gap is arranged between the outer peripheral surface between the two ends of the multi-section cylinder 12 and the main body shell 11.

[0045] Reference Figure 1The multi-section cylinder 12 has a first channel 101, a second channel 102, a connecting channel 103 and a joint channel 104 formed inside. The first channel 101 and the second channel 102 are both connected to the connecting channel 103, and the first channel 101 and the second channel 102 are respectively located on both sides of the connecting channel 103. The inner diameter of the first channel 101 and the inner diameter of the second channel 102 are both larger than the inner diameter of the connecting channel 103, and the inner diameter of the first channel 101 is the same as the inner diameter of the second channel 102.

[0046] Continue to refer to Figure 1 There are two joint channels 104, one of which is connected to the first channel 101 and extends to one end of the multi-section cylinder 12 along the axial direction of the first channel 101, and the other joint channel 104 is connected to the second channel 102 and extends to the other end of the multi-section cylinder 12 along the axial direction of the second channel 102. The inner diameter of the first channel 101 and the inner diameter of the second channel 102 are both smaller than the inner diameter of the joint channel 104. The inner wall of the joint channel 104 is fixedly installed with a mounting joint, and the mounting joint is penetrated to open a mounting channel, and the mounting channel is connected to the first channel 101 or the second channel 102.

[0047] Reference Figure 2 The outer circumference of the main shell 11 is provided with a clearance groove 111, and in the embodiment of the present application, the number of the clearance grooves 111 is set to two, and the two clearance grooves 111 are respectively set on both sides of the multi-section cylinder 12. The clearance groove 111 is set near the top of the main shell 11, and the inner wall of the clearance groove 111 away from its own notch is set close to the inner wall of the connecting channel 103, that is, a part of the outer circumference of the connecting channel 103 is used as the inner wall of the clearance groove 111 away from the notch of the clearance groove 111. A lining plate 112 is set in the clearance groove 111, and the lining plate 112 is set near the middle of the clearance groove 111, and the lining plate 112 is integrally connected to the inner wall of the clearance groove 111, so as to ensure the structural stability of the clearance groove 111.

[0048] Reference Figure 2 and Figure 3 The bottom of the main body shell 11 is provided with a forming cavity 113, and the inner wall of the forming cavity 113 away from the notch thereof is arranged close to the multi-segment cylinder 12, that is, another part of the outer peripheral surface of the multi-segment cylinder 12 serves as the inner wall of the forming cavity 113 away from the notch of the forming cavity 113. The forming cavity 113 is isolated from the recess 111 by the horizontal fixing plate 3, that is, one side of the horizontal fixing plate 3 serves as the inner wall of the forming cavity 113 and the other side serves as the inner wall of the forming cavity 113, and both sides of the horizontal fixing plate 3 are respectively connected to the main body shell 11 and the multi-segment cylinder 12 in one piece, so as to ensure the stability of the connection between the main body shell 11 and the multi-segment cylinder 12.

[0049] Reference Figure 1 and Figure 3 , the bottom of the multi-section cylinder 12 is integrally connected with a first transverse fixing plate 4, and in the embodiment of the present application, the number of the first transverse fixing plates 4 is set to two. The two first transverse fixing plates 4 are both arranged vertically with the multi-section cylinder 12, and one of the first transverse fixing plates 4 is arranged at the bottom of the first channel 101 and is arranged near one of the joint channels 104, and the other first transverse fixing plate 4 is arranged at the bottom of the second channel 102 and is arranged near another joint channel 104, so that the connection between the first channel 101 and the joint channel 104 and the connection between the second channel 102 and the joint channel 104 are not easily deformed due to a sudden change in the inner diameter. In addition, the bottom of the first transverse fixing plate 4 is arranged flush with the bottom of the main housing 11 to ensure the stability of the flow meter when it is installed or stored.

[0050] Reference Figure 1 and Figure 3 , the bottom of the multi-section cylinder 12 is integrally connected with a second transverse fixing plate 5, and in the embodiment of the present application, the number of the second transverse fixing plates 5 is set to two. The two second transverse fixing plates 5 and the two first transverse fixing plates 4 are arranged in parallel with each other, and one of the second transverse fixing plates 5 is arranged at the bottom of the first channel 101 and close to one end of the connecting channel 103, and the other second transverse fixing plate 5 is arranged at the bottom of the second channel 102 and close to the other end of the connecting channel 103, so that the connection between the first channel 101 and the connecting channel 103 and the connection between the second channel 102 and the connecting channel 103 are not easily deformed due to a sudden change in the inner diameter.

[0051] Reference Figure 3 A longitudinal fixing plate 6 is integrally connected to the bottom of the multi-section cylinder 12, and the longitudinal fixing plate 6 is arranged between the two second transverse fixing plates 5, and the two ends of the longitudinal fixing plate 6 are respectively and vertically integrally connected to the sides of the two second transverse fixing plates 5 that are arranged opposite to each other, and the longitudinal fixing plate 6 and the two second transverse fixing plates 5 are distributed in an "H" shape.

[0052] Reference Figure 1 The top inner wall of the first channel 101 is integrally connected with a first boss 121, and the first boss 121 is arranged close to the connecting channel 103. The thickness of the first boss 121 is 0.15 mm, and the width of the first boss 121 is 2 mm; the top inner wall of the second channel 102 is integrally connected with a second boss 123, and the second boss 123 is arranged close to the connecting channel 103. The thickness of the second boss 123 is 0.15 mm, and the width of the second boss 123 is 2 mm.

[0053] Reference Figure 1The first boss 121 defines a first sensor channel 122 , the second boss 123 defines a second sensor channel 124 , and the first sensor channel 122 and the second sensor channel 124 are connected via a detection introduction channel 125 .

[0054] Reference Figure 4 The top inner wall of the main shell 11 is integrally connected with an upper fixing plate 7, which is arranged near the middle of the main shell 11, and the detection introduction channel 125 is opened on the upper fixing plate 7. Two placement surfaces 126 are arranged on the top of the multi-section cylinder 12, and the two placement surfaces 126 are respectively arranged at the two ends of the multi-section cylinder 12, and the placement surfaces 126 are arranged flush with the surface of the upper fixing plate 7.

[0055] Reference Figure 4 The upper fixing plate 7 is provided with four threaded holes 701, which are arranged in a rectangular shape. The upper fixing plate 7 is integrally connected with four threaded barrels which are respectively arranged in one-to-one correspondence with the threaded holes 701, and the threaded barrels extend to the horizontal fixing plate 3 along the height direction of the main housing 11.

[0056] Reference Figure 1 The detector 2 includes a substrate 21 and a detection element 22; the substrate 21 is rectangular, and is mounted on the upper fixing plate 7 by four bolts corresponding to the threaded holes 701, and the bottom of the substrate 21 is tightly matched with the placement surface 126. The substrate 21 is provided with two limiting holes (not shown in the figure), and the two limiting holes are both set through the thickness direction of the substrate 21;

[0057] The upper fixing plate 7 is integrally connected with two nail pins 71 arranged corresponding to the limiting holes. The two nail pins 71 are respectively inserted into and penetrated into the limiting holes, so that when the base plate 21 is installed, the base plate 21 is not easily displaced due to the rotation of the bolts; the detection element 22 is fixedly installed on the base plate 21, and the detection element 22 is arranged in the detection introduction channel 125, so as to facilitate fluid detection of the fluid flowing through the detection introduction channel 125.

[0058] Reference Figure 1 and Figure 4 The upper fixed plate 7 is provided with a sealing groove 702, which is closed from beginning to end, and the detection introduction channel 125 is located in the area surrounded by the sealing groove 702. A sealing ring 72 is fixedly embedded in the sealing groove 702, and the two sides of the sealing ring 72 are respectively tightly matched with the inner wall of the sealing groove 702 and the bottom of the substrate 21 to reduce the occurrence of water seepage in the detection introduction channel 125.

[0059] The implementation principle of the injection molding structure of the flow meter body 1 in an embodiment of the present application is as follows: the clearance groove 111 and the molding cavity 113 make the thickness dimensions of the main body shell 11 and the multi-section cylinder 12 relatively close at various locations, so that the main body shell 11 and the multi-section cylinder 12 are not prone to obvious uneven shrinkage due to uneven heat dissipation during cooling and molding, so that the flow meter is not easy to deform during injection molding, thereby ensuring the detection accuracy of the flow meter.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A flow meter main body injection molding structure, comprising a main body (1), wherein a first channel (101), a second channel (102) and a connecting channel (103) are provided inside the main body (1), wherein the first channel (101) and the second channel (102) are both connected to the connecting channel (103), and the first channel (101) and the second channel (102) are respectively located on both sides of the connecting channel (103); characterized in that: The outer peripheral surface of the main body (1) is provided with a clearance groove (111), and the clearance groove (111) is arranged away from the inner wall of the groove itself and close to the inner wall of the connecting channel (103).

2. The flow meter main body injection molding structure according to claim 1, characterized in that: A lining plate (112) is arranged in the clearance groove (111), and the lining plate (112) is integrally connected to the inner wall of the clearance groove (111).

3. The flow meter main body injection molding structure according to claim 1, characterized in that: The main body (1) comprises a main body shell (11) and a multi-section cylinder (12); the multi-section cylinder (12) is integrally connected to the main body shell (11); the first channel (101), the second channel (102) and the connecting channel (103) are all provided in the multi-section cylinder (12); a molding cavity (113) is provided at the bottom of the main body shell (11); the molding cavity (113) is arranged away from the inner wall of the groove and close to the outer peripheral surface of the multi-section cylinder (12).

4. The flow meter main body injection molding structure according to claim 3, characterized in that: The clearance groove (111) is provided on the outer peripheral surface of the main shell (11), and the clearance groove (111) is isolated from the molding cavity (113) by a horizontal fixing plate (3), and the two sides of the horizontal fixing plate (3) are respectively integrally connected to the main shell (11) and the multi-section cylinder (12).

5. The flow meter main body injection molding structure according to claim 3, characterized in that: The multi-section cylinder (12) is integrally connected to a first transverse fixing plate (4), and both sides of the first transverse fixing plate (4) are integrally connected to the inner wall of the molding cavity (113).

6. The flow meter main body injection molding structure according to claim 5, characterized in that: The multi-section cylinder (12) is also provided with a joint channel (104); The joint channel (104) is connected to the first channel (101) or the second channel (102), and the inner diameter of the joint channel (104) is larger than the inner diameter of the first channel (101) or the second channel (102); The first transverse fixing plate (4) is arranged at the bottom of the first channel (101) or the second channel (102) and is arranged close to the joint channel (104).

7. The flow meter main body injection molding structure according to claim 5, characterized in that: The multi-section cylinder (12) is integrally connected to a second transverse fixing plate (5), the second transverse fixing plate (5) is arranged at the bottom of the first channel (101) or the second channel (102) and close to the connecting channel (103), and both sides of the second transverse fixing plate (5) are integrally connected to the inner wall of the molding cavity (113).

8. The flow meter main body injection molding structure according to claim 7, characterized in that: A plurality of the second transverse fixing plates (5) are provided, and the axes of the plurality of the second transverse fixing plates (5) are all arranged perpendicular to the axis of the connecting channel (103); The plurality of second transverse fixing plates (5) are divided into two groups, wherein one group of the second transverse fixing plates (5) is arranged between the first channel (101) and the connecting channel (103), and the other group of the second transverse fixing plates (5) is arranged between the second channel (102) and the connecting channel (103); The multi-section cylinder (12) is integrally connected with a longitudinal fixing plate (6), the longitudinal fixing plate (6) is arranged between two groups of second transverse fixing plates (5), and the two ends of the longitudinal fixing plate (6) are respectively vertically and integrally connected to the two groups of second transverse fixing plates (5).

9. The flow meter main body injection molding structure according to claim 1, characterized in that: The device also comprises a detector (2), the detector (2) comprising a substrate (21) and a detection element (22), the substrate (21) being mounted on the main body (1) by means of bolts, the detection element (22) being mounted on the substrate (21), the detection element (22) being used to detect the flow rate of a fluid flowing through the flow meter; a limiting hole is provided through the substrate (21), the main body (1) is provided with a pin (71), and the pin (71) is inserted into and penetrates the limiting hole.

10. The flow meter main body injection molding structure according to claim 1, characterized in that: The inner wall of the first channel (101) is integrally connected with a first boss (121), and the first boss (121) is provided with a first sensor channel (122); the inner wall of the second channel (102) is integrally connected with a second boss (123), and the second boss (123) is provided with a second sensor channel (124), and the first sensor channel (122) is connected to the second sensor channel (124); The flow meter main body injection molding structure also includes a detector (2), and the detector (2) is used to detect the flow rate of the fluid flowing through the first sensor channel (122) and the second sensor channel (124).

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