End cap, barrel and capacitance measuring device

Abstract

The application provides an end cover, a cylinder and a capacitance measuring device, wherein the end cover has a mounting surface, a plurality of mounting grooves are arranged on the mounting surface from inside to outside and spaced from each other, characterized in that a groove wall is formed between any two adjacent mounting grooves, and the height of the plurality of groove walls gradually decreases from inside to outside. The technical effect of the application is that when the end cover is used for mounting a plurality of cylindrical structures, the relative position between each layer of the groove wall and each layer of the plurality of cylindrical structures can be adjusted in sequence, thereby improving the installation convenience of the plurality of cylindrical structures; the cylinder can arrange as many layers of cylindrical structures as possible in a smaller cylinder diameter due to the use of the end cover; and the capacitance measuring device can arrange as many layers of polar plates as possible in a smaller outer diameter due to the use of the end cover, thereby improving the measurement accuracy.

Description

Technical Field

[0001] The present application belongs to the field of assembly of mechanical parts, and more specifically, relates to an end cover, a cylinder and a capacitance measuring device. Background Art

[0002] Existing technologies (CN102608174A, CN2811996Y) provide technical solutions for measuring steam dryness using multi-layer cylindrical capacitance measuring devices. However, since the refrigerant piping system is generally thinner than the water vapor piping system, and the dielectric constant change is relatively insignificant, it is necessary to arrange as many concentric electrode tubes as possible within a smaller outer tube diameter to improve measurement accuracy. However, as the diameter and thickness of the electrode tubes decrease, the multi-layer concentric electrode tubes will produce large end face displacement during installation, which places higher requirements on the installation convenience of the electrode tubes. Summary of the Invention

[0003] In view of this, the present application provides an end cover having a mounting surface on which multiple layers of mounting grooves are arranged from the inside to the outside, wherein: a groove wall is formed between any two adjacent mounting grooves. In other words, any two adjacent mounting grooves are separated by the groove wall, and the height of the multiple layers of groove walls gradually decreases from the inside to the outside.

[0004] Preferably, each layer of the groove wall is broken into multiple sections along the circumferential direction, wherein there is a predetermined interval between the multiple sections of the broken groove wall; and / or, the number of the mounting grooves is an even number greater than or equal to two.

[0005] Preferably, the end cover forms a through hole at a location where the groove walls are disconnected from each other, so as to allow fluid to pass through and / or allow an adjustment tool to pass through the through hole to adjust the multi-layer cylindrical structure.

[0006] Preferably, the groove body of the multi-layer installation groove extends in a direction perpendicular to the installation surface and has a groove bottom in the same plane, so that after one end of the multi-layer cylindrical structure is inserted into the multi-layer installation groove, the ends of different layers can be properly installed without interfering with the groove bottom.

[0007] Preferably, the end cap is arranged in an annular shape, extending radially outward from the center of the annular shape to form a plurality of bracket bodies connecting the center of the annular shape and the inner circumference, wherein the plurality of bracket bodies constitute a mounting bracket, wherein the mounting bracket is a specific presentation of the above-mentioned mounting surface;

[0008] A plurality of mounting grooves are correspondingly arranged at intervals on the bracket body to form multi-layer mounting grooves;

[0009] On the mounting bracket, the plurality of mounting grooves are arranged at predetermined intervals along the radial direction of the annular shape, wherein the mounting grooves at the same distance from the center of the annular shape constitute mounting grooves of the same layer; the predetermined distance is determined according to the distance between different layers of the multi-layer cylindrical structure, so that the plurality of mounting grooves are divided into different layers according to different distances from the center of the end cover, so as to correspond to different layers of the multi-layer cylindrical structure; and

[0010] The groove wall between the two layers of the mounting grooves is a disconnected multi-segment groove wall belonging to the same layer; the intervals between the multiple segments of the bracket body are the predetermined intervals between the disconnected multi-segment groove walls; and the inner circle of the annular shape is a through hole allowing fluid to pass through.

[0011] The present application also provides a cylinder, which includes: a multi-layer cylindrical structure, which is formed by multiple cylindrical structures spaced apart and nested layer by layer; at least one end of the multi-layer cylindrical structure is installed with the aforementioned end cover.

[0012] The present application also provides a capacitance measuring device, which includes: a conductive electrode plate tube, which is composed of at least a pair of cylindrical electrode plates, and is used to generate the electric field required for measuring capacitance, wherein multiple electrode plates are arranged in layers at intervals; it is characterized in that: at least one end of the conductive electrode plate tube is installed with the aforementioned end cap.

[0013] Preferably, flanges are fixedly provided at both ends of the electrode plate in the outermost layer, which are used to connect the conductive electrode plate tube to the pipeline; the end cover is installed at the end of the conductive electrode plate tube through the flange, wherein: the mounting groove of the end cover faces the electrode plate, and multiple electrode plates are installed in the multi-layer mounting groove to maintain a predetermined position; and the other end surface of the end cover opposite to the mounting surface is configured to fit tightly with another flange connected to the flange where the end cover is located, so as to enhance the sealing performance between the aforementioned two flanges.

[0014] Preferably, the aforementioned capacitance measuring device is used in refrigerant piping, wherein: the end cap is made of a material that is elastic and / or refrigerant-resistant; and / or the end cap is manufactured using a selective laser sintering process. Preferably, a wire hole is provided on the periphery of the end cap to allow wires to pass through; and / or the end cap is connected to the flange via countersunk screws.

[0015] The technical effect of the present application is that, when the end cap is used to install a multi-layer cylindrical structure, the relative position between each layer of the groove wall and each layer of the multi-layer cylindrical structure can be adjusted in sequence, thereby improving the installation convenience of the multi-layer cylindrical structure; the cylinder body can arrange as many layers of cylindrical structures as possible within a smaller cylinder diameter due to the use of the end cap; the capacitance measuring device can arrange as many layers of electrode plates as possible within a smaller outer diameter due to the use of the end cap, thereby improving measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of an end cap according to an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the installation relationship between the end cover and the multi-layer cylindrical structure according to one embodiment of the present application;

[0018] Figure 3 This is a three-dimensional diagram of a capacitance measuring device according to an embodiment of the present application, illustrating the installation relationship between the end cap, the flange, and the conductive plate cylinder;

[0019] Figure 4 for Figure 3 A cross-sectional view showing a situation in which the multiple groove walls of the end cover are arranged to gradually decrease from the inside to the outside, and the installation relationship between the multiple mounting grooves and the multi-layer electrode plates of the conductive electrode plate cylinder;

[0020] Figure 5 for Figure 3 Left view of;

[0021] Figure 6 for Figure 5 The cross-sectional view along section AA is used to illustrate that the multiple groove walls of the end cover are arranged to gradually decrease from the inside to the outside, and the installation relationship between the groove walls and the multi-layer electrode plates of the conductive plate cylinder.

[0022] Reference numerals:

[0023] DETAILED DESCRIPTION

[0024] The preferred embodiments of the present application are described below with reference to the accompanying drawings.

[0025] The present application provides an end cap, which has a mounting surface on which multiple layers of mounting grooves 12 are spaced apart from each other from the inside to the outside. The end cap 1 is characterized in that a groove wall 14 is formed between any two adjacent mounting grooves 12. In other words, any two adjacent mounting grooves 12 are separated by the groove wall 14, and the height of the multiple layers of groove walls 14 gradually decreases from the inside to the outside. The mounting surface can be the end face of the end cap 1 facing the multi-layer cylindrical structure when it is installed therewith; the groove wall 14 can have a continuous outer contour, or it can be broken into multiple sections along its length to leave adjustment space, so that the multi-layer cylindrical structure 2 can be adjusted during installation. Preferably, each layer of the groove wall 14 is broken into multiple sections along the circumferential direction, wherein there is a predetermined interval between the multiple sections of the broken groove wall 14; the end cover forms a through hole along its own thickness direction between the multiple sections of the groove wall 14 that are broken away from each other, so as to allow fluid to pass through and / or pass adjustment tools (such as tweezers, etc.) through the through hole to adjust the multi-layer cylindrical structure; the groove body of the multi-layer mounting groove 12 extends along the thickness direction of the end cover and has a groove bottom 13 in the same plane, so that the multi-layer mounting groove 12 can accommodate one end of the multi-layer cylindrical structure 2 for insertion.

[0026] The end cap 1 and its mounting groove 12 may have a suitable structure. For example, one end face of the end cap 1 may have multiple layers of coaxially spaced annular mounting grooves 12. Figure 1 As shown, the end cover 1 is set to be annular, extending outward from the center of the ring along the radial direction of the ring to form multiple sections of bracket bodies connecting the center of the ring and the inner circumference of the ring, and multiple sections of the bracket body constitute a mounting bracket 11; preferably, the bracket body has a cross-intersecting shape; multiple mounting grooves 12 are arranged on the mounting bracket 11 at predetermined distances along the radial direction of the ring, wherein: the mounting grooves 12 with the same distance from the center of the ring constitute the same layer of mounting grooves 12, therefore, the multiple mounting grooves 12 are divided into different layers according to different distances from the center of the end cover 1, so as to correspond to different layers of the multi-layer cylindrical structure 2; the groove wall 14 between the two layers of the mounting grooves 12 is a disconnected multi-section groove wall 14 belonging to the same layer; the interval between the multiple sections of the bracket body is the predetermined interval between the disconnected multi-section groove wall 14; the inner circle of the ring is a through hole allowing fluid to pass through.

[0027] The following combination Figure 2The process of using the end cover 1 to install the multi-layer cylindrical structure 2 is described, and the process includes the following steps: installing one end of the multi-layer cylindrical structure 2 at a predetermined position so that the end surfaces of different layers at the other end of the multi-layer cylindrical structure 2 are at the same horizontal plane; making the end cover 1 close to the other end of the multi-layer cylindrical structure 2, and the end of the end cover 1 having the mounting groove 12 is facing the multi-layer cylindrical structure 2; since the height of the groove wall 14 gradually decreases from the inside to the outside along the radial direction of the end cover 1, the mounting groove 12 that first approaches the multi-layer cylindrical structure 2 is the innermost mounting groove 12, adjusting the relative position between the innermost mounting groove 12 and the innermost layer of the multi-layer cylindrical structure 2, and making the end cover 1 continue to approach the multi-layer cylindrical structure 2 so that the innermost mounting groove 12 is interlocked with the innermost layer of the multi-layer cylindrical structure 2; after the innermost layer of the mounting groove 12 is interlocked with the innermost layer of the multi-layer cylindrical structure 2, due to the height difference of the groove wall 14, the sub-inner layer of the mounting groove 12 and the sub-inner layer of the multi-layer cylindrical structure 2 are still in an uninterlocked state. Therefore, the relative positions of the sub-inner layers of the multiple mounting grooves 12 and the sub-inner layers of the multi-layer cylindrical structure 2 can be adjusted, and the end cover 1 with the stepped groove wall 14 can continue to approach the other end of the multi-layer cylindrical structure 2 so that the mounting groove 12 of the sub-inner layer is interlocked with the sub-inner layer of the multi-layer cylindrical structure 2; and, the approach and adjustment operations are repeated to adjust the relative position between each layer of the mounting groove 12 and each layer of the multi-layer cylindrical structure 2 from the inside to the outside. It can be seen that when the end cover is used to install the multi-layer cylindrical structure, the relative position between each layer of the groove wall and each layer of the multi-layer cylindrical structure can be adjusted in sequence, thereby improving the installation convenience of the multi-layer cylindrical structure.

[0028] The present application also provides a cylindrical body, comprising a multi-layer cylindrical structure 2, which is formed by a plurality of cylindrical structures interlaced layer by layer; wherein at least one end of the multi-layer cylindrical structure 2 is mounted with an end cap 1 of the present application. The cylindrical body can be obtained through the above-mentioned assembly process. Due to the use of the end cap provided by the present application, the cylindrical body can be arranged with as many layers of cylindrical structures as possible within a smaller cylindrical body diameter.

[0029] The present application also provides a capacitance measuring device, such as Figure 3 As shown, it includes: a conductive plate tube 3, which is composed of at least a pair of cylindrical plates, used to generate the electric field required for capacitance measurement, wherein the plurality of plates are spaced apart and nested layer by layer; at least one end of the conductive plate tube 3 is mounted with an end cap 1 provided by the present application. Due to the use of the end cap provided by the present application, the capacitance measuring device can arrange as many layers of plates as possible within a smaller diameter, thereby improving measurement accuracy.

[0030] In order to connect the capacitive measuring device to the pipeline, preferably, flanges 4 are fixedly arranged at both ends of the outermost electrode plates, which are used to connect the conductive electrode plate cylinder 3 to the pipeline; the end cover 1 is installed at the end of the conductive electrode plate cylinder 3 through the flanges 4, wherein:

[0031] The installation groove of the end cover 1 faces the electrode plates, and a plurality of electrode plates are installed in the multi-layer installation groove 12 to be kept in a predetermined position; and the other end surface of the end cover 1 opposite to the installation surface is arranged to be tightly fitted with another flange 4 connected to the flange 4 where the end cover 1 is located, so as to enhance the sealing performance between the two flanges 4.

[0032] Preferably, the capacitive measuring device is used for a refrigerant pipeline, wherein: the end cover 1 is made of a material with elasticity and / or resistance to refrigerant corrosion, such as polytetrafluoroethylene material or industrial nylon material; the end cover 1 can be manufactured in an appropriate manner, for example, in large quantities, it can be molded or injection molded, and in small quantities, it can be manufactured by selective laser sintering or CNC engraving. Preferably, lead holes 15 are provided on the circumferential surface of the end cover 1 to allow the lead wires to pass through; and / or the end cover 1 is connected to the flange 4 by a countersunk screw 5.

[0033] A preferred embodiment of the present application designs an end cover 1 as an electrode plate fixing structure to fix a plurality of electrode plates on the end cover 1, and uses a flange 4 fixedly connected (preferably welded) on the pipeline end of the first layer of electrode plates 31 (the outermost layer) as an installation structure to connect the capacitive measuring device to the refrigerant pipeline. Wherein, the number of electrode plates constituting the conductive electrode plate cylinder 3 can be 1-4 pairs (i.e. 2-8 layers); wherein the innermost electrode plate always serves as the positive electrode, and the outermost electrode plate always serves as the negative electrode and is grounded; the remaining electrode plates are connected by lead wires with insulating sheaths at intervals, forming a positive-negative alternating structure. Figure 4 Or Figure 6 Taking 3 pairs of electrode plates in the conductive electrode plate cylinder 3 as an example, the sixth layer of electrode plates 36 (the innermost layer), the fourth layer of electrode plates 34, and the second layer of electrode plates 32 are connected as positive electrodes, and the first layer of electrode plates 31 (the outermost layer), the third layer of electrode plates 33, and the fifth layer of electrode plates 35 are connected as negative electrodes and are grounded.

[0034] The threaded fastener 6 consisting of four sets of screws, spring washers and nuts inserted into the flange bolt holes can not only reinforce the entire capacitance measuring device, but also fix the capacitance measuring device to the flange 4 of the refrigerant pipeline. The end cover 1 can be made of polymer materials such as nylon or polytetrafluoroethylene, and each end cover 1 is fixed to the flanges 4 at both ends using four countersunk screws 5; at the same time, a lead-in hole 15 is designed on the end cover 1, and the ultra-fine shielding wire can pass through the hole to reach the outside without affecting the sealing of the contact surface of the flange 4; in order to further fix the shielding wire and improve the sealing, epoxy resin sealant can be poured into the lead-in hole 15 after threading the wire; at least one of the two end covers 1 at both ends is provided with a plurality of mounting grooves 12 at radial intervals, and a plurality of groove walls 14 are formed between the two adjacent mounting grooves 12, and the plurality of groove walls 14 are arranged to gradually decrease from the inside to the outside, so that the plate can be conveniently inserted layer by layer from the inside to the outside during production and assembly, reducing the difficulty of assembly; the end cover 1 and the flange 4 fit tightly, and the polymer material used has certain elasticity and good corrosion resistance, so the end cover 1 can also play the role of a flange gasket. In this embodiment, because refrigeration systems typically have thinner pipe diameters and relatively less pronounced dielectric constant variations compared to steam systems: A) Refrigeration systems require as many concentric measuring tubes as possible within a smaller outer tube diameter to improve measurement accuracy. This places high demands on the fixture's machining precision and ease of installation. To address machining precision, the end caps were manufactured from industrial nylon plastic using 3D printing technology using Selective Laser Sintering (SLS). To facilitate installation, the mounting groove 12 of one of the end caps 1 is designed to be stepped. To install the concentric tubes, nickel sheets are first spot-welded onto each measuring tube. The tubes are then inserted, working from the inside out, onto a fixture at the same height as the top. The stepped mounting groove 12 is then pressed onto the top of the measuring tube bundle. Tweezers are used to fine-tune the tube end faces from the inside out, and the stepped mounting groove 12 is then pressed down layer by layer until it is firmly seated. Finally, the sensor is completed by welding wires to the nickel sheet. B) Refrigeration systems require a more precise seal, necessitating improved sealing at the mounting end. However, to avoid drilling holes in the outermost measuring tube, which would compromise overall strength and sealing, the sensor wires are preferably routed outward from the end face. To address this issue, a multi-functional end cap 1 was designed that combines the functions of securing the measuring tube and sealing the flange, with a side lead channel. This end cap 1 is manufactured using corrosion-resistant materials such as industrial nylon using a 3D laser sintering (SLS) printing process.

[0035] In the description of this application, it should be noted that the directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the technical features are usually placed when used. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the technical features referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting this application. Terms such as "first", "second", and "third" are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components must be absolutely horizontal or overhanging, but can be slightly tilted ( For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly tilted); the terms "approximately" and "basic" indicate that a certain feature or range is similar or close to the predetermined requirements to some extent, but does not need to be completely consistent. It implies a certain flexibility and room for change, allowing certain modifications without affecting its core concept or function; in addition, unless otherwise clearly stipulated and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood in combination with specific circumstances.

[0036] The preferred embodiments of the present application are described in detail above. However, the present application is not limited to the specific details of the above embodiments. Within the technical concept of the present application, various simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the scope of protection of the present application.

[0037] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner unless there is any contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0038] In addition, the various implementation methods of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A capacitance measuring device, comprising: A conductive plate cylinder (3) is composed of at least one pair of cylindrical plates, and is used to generate an electric field required for measuring capacitance, wherein a plurality of the plates are spaced apart and arranged layer by layer; and is characterized in that at least one end of the conductive plate cylinder (3) is provided with an end cap (1); The end cover (1) has a mounting surface, on which multiple layers of mounting grooves (12) are arranged spaced apart from each other from the inside to the outside, characterized in that a groove wall (14) is formed between any two adjacent mounting grooves (12), and the height of the multiple layers of groove walls (14) gradually decreases from the inside to the outside; Each layer of the groove wall (14) is divided into multiple sections along the circumferential direction; The end cover (1) forms a through hole at a location where the groove walls (14) are disconnected from each other, allowing an adjustment tool to pass through.

2. The capacitance measuring device according to claim 1, wherein: There are predetermined intervals between the multiple broken sections of the groove wall (14).

3. The capacitance measuring device according to any one of claims 1 to 2, characterized in that: The groove bodies of the multi-layer installation grooves (12) extend in a direction perpendicular to the installation surface and have groove bottoms (13) located in the same plane.

4. The capacitance measuring device according to claim 3, wherein: The end cover (1) is arranged in an annular shape and extends radially outward from the center of the annular shape to form a plurality of bracket bodies connecting the center of the annular shape and the inner circumference, and the plurality of bracket bodies constitute a mounting bracket (11); A plurality of mounting grooves (12) are correspondingly arranged at intervals on the bracket body to form multi-layer mounting grooves (12); On the mounting bracket (11), a plurality of mounting grooves (12) are arranged at intervals along the radial direction of the ring, wherein the mounting grooves (12) at the same distance from the center of the ring constitute the same layer of mounting grooves (12).

5. The capacitance measuring device according to claim 1, wherein: Flanges (4) are fixedly provided at both ends of the electrode plate in the outermost layer, and the flanges (4) are used to connect the conductive electrode plate cylinder (3) to a pipeline; the end cover (1) is installed at the end of the conductive electrode plate cylinder (3) through the flange (4), wherein: The mounting groove of the end cover (1) faces the electrode plate, and a plurality of the electrode plates are mounted in the multi-layer mounting groove (12) to be maintained in a predetermined position; and the other end surface of the end cover (1) opposite to the mounting surface is configured to be tightly fitted with another flange (4) connected to the flange (4) on which the end cover (1) is located.

6. The capacitance measuring device according to claim 5, used in a refrigerant pipeline, characterized in that: The end cover (1) is made of a material that is elastic and / or resistant to refrigerant corrosion; and / or the end cover (1) is manufactured using a selective laser sintering process.

7. The capacitance measuring device according to claim 5 or 6, characterized in that: A wire hole (15) is provided on the circumference of the end cover (1) to allow a wire to pass through; and / or the end cover (1) is connected to the flange (4) via a countersunk screw (5).

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