Splicing type connector suitable for single-screw flowmeter

Abstract

The utility model relates to the technical field of flow meters, and discloses a splicing type connector suitable for a single-screw flow meter, which comprises an inner plate and an outer plate which are sequentially arranged from inside to outside, a gap is reserved between the inner plate and the outer plate, the inner plate and the outer plate are connected through a connecting rod, a screw connecting hole is formed in the circle center of the inner plate, and a screw is arranged in the screw connecting hole. A containing groove is formed in the circle center of the side face of the side, facing the inner plate, of the outer plate, a ball is arranged in the containing groove, a screw is arranged in the screw connecting hole, an annular sliding bearing component is arranged between the screw and the screw connecting hole, and the end face of the screw abuts against the ball and is in point contact with the ball. By arranging the spliced joint, the filler entering the gap can be timely discharged from the other end of the screw connecting hole, so that the phenomena that the screw cannot rotate normally and the screw and the joint are abraded and even blocked due to excessive filler accumulation are fundamentally avoided, and the metering precision and the service life of the flowmeter are ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meters, and in particular relates to a spliced joint suitable for a single-screw flow meter. Background Art

[0002] Flowmeters are one of the most important instruments in industrial measurement, especially single-screw flowmeters, which are widely used in various fields of industrial manufacturing due to their simple and stable structure. As a type of positive displacement flowmeter, single-screw flowmeters can accurately measure liquid flow. Their working principle is to enclose a screw-shaped measuring rotor in a sealed metering chamber. Driven by the inlet and outlet pressure differential, the liquid flows, thereby driving the measuring rotor to rotate. A continuous independent metering chamber is formed axially between the rotor and the metering chamber. The liquid flows through the chamber by repeatedly filling and emptying from the inlet. The total volume of the fluid is measured based on the number of times the metering chamber is repeatedly filled and discharged with the corresponding volume of fluid.

[0003] In existing single-screw flowmeters, joints for sealing are provided at both ends of the metering cavity. A limiting groove that matches the end of the screw is opened on the inner side of the joint, and the screw located between the two joints is rotatably connected to the joint. For fluids doped with fillers, tiny fillers can easily enter the gap between the screw and the joint during the flow process. When too much filler accumulates in the gap, it not only affects the normal rotation of the screw, but also causes wear on the screw and the joint, resulting in a decrease in metering accuracy and a shortened service life. In severe cases, the screw becomes stuck due to the blockage of the filler, and the flowmeter cannot be used normally. In addition, the end face of the screw and the bottom of the limiting groove are in surface contact, and the friction surface between the two is large. The screw needs to overcome a large friction force during rotation, which not only causes wear on the end of the screw but also consumes more energy. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a spliced joint suitable for a single-screw flowmeter to solve the technical problem in the prior art that filler enters the gap between the screw and the joint, causing wear or even jamming of the two.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A splicing joint suitable for a single-screw flowmeter, comprising an inner plate and an outer plate arranged sequentially from the inside to the outside, a gap being left between the inner plate and the outer plate, two opposite limiting holes being opened on the outer edge of the inner plate, two opposite first limiting grooves being opened on the outer edge of the outer plate, the inner plate and the outer plate being connected by a connecting rod, the connecting rod comprising a rod body and an annular protrusion located in the middle of the rod body, the inner end of the connecting rod being inserted into the limiting hole, the outer end of the connecting rod being inserted into the first limiting groove, a screw connecting hole being opened at the center of the inner plate, a receiving groove being opened at the center of the side surface of the outer plate facing the inner plate, a ball bearing being arranged in the receiving groove, a screw being arranged in the screw connecting hole, an annular bearing sliding component being arranged between the screw and the screw connecting holes, the end face of the screw being abutted against the ball bearing and the two forming point contact;

[0007] Furthermore, the inner plate and the outer plate are both cylindrical, their axes coincide with each other, and the diameter of the inner plate is smaller than the diameter of the outer plate;

[0008] Furthermore, two symmetrical first flow holes are formed on the inner plate, and two symmetrical second flow holes are formed on the outer plate. The first flow holes and the second flow holes are both in the shape of arc grooves and have the same size. When the limiting hole is directly opposite to the first limiting groove, the first flow holes and the second flow holes are directly opposite to and overlap with each other.

[0009] Furthermore, the connecting rod is divided by an annular protrusion, the diameter of the inner end portion of the connecting rod is consistent with the inner diameter of the limiting hole, and the diameter of the outer end portion of the connecting rod is consistent with the inner diameter of the first limiting groove;

[0010] Furthermore, the receiving groove is directly opposite to the screw connecting hole, a ball is rollingly connected in the receiving groove, and the ball can be detached from the receiving groove;

[0011] Furthermore, one end of the sliding component away from the outer plate is exposed outside the screw connection hole, and the sliding component is a shaft sleeve.

[0012] The beneficial effects of the present invention are:

[0013] (1) Compared with the prior art, by setting up a spliced joint, when the fluid with filler passes through the flow meter, tiny fillers will inevitably enter the gap between the screw and the sliding part. Since the screw and the sliding part pass through the entire inner plate, the filler entering the gap can be discharged from the other end of the screw connection hole in time, fundamentally avoiding the phenomenon of the screw not being able to rotate normally due to excessive accumulation of filler, wear between the screw and the joint, or even jamming, thereby ensuring the measurement accuracy and service life of the flow meter;

[0014] (2) The end face of the screw is against the ball bearing, which can provide limiting support for the screw. The contact between the two is point contact. The small contact surface can significantly reduce the friction resistance encountered by the screw during rotation, thereby preventing wear on the end of the screw and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0016] Figure 1 This is an overall schematic diagram of a spliced joint suitable for a single-screw flowmeter in Example 1 of the present utility model;

[0017] Figure 2 This is an exploded view of a spliced joint suitable for a single-screw flowmeter in Example 1 of the present utility model;

[0018] Figure 3 This is a cross-sectional view of a spliced joint suitable for a single-screw flowmeter in Example 1 of the present utility model;

[0019] Figure 4 This is a cross-sectional view of a spliced joint suitable for a single-screw flowmeter in Example 2 of the present utility model;

[0020] Figure 5 This is a cross-sectional view of a spliced joint suitable for a single-screw flowmeter in Example 3 of the present utility model.

[0021] The following are marked in the accompanying drawings:

[0022] Joint 1, inner plate 11, first flow hole 111, limiting hole 112, screw connecting hole 113, second limiting groove 114, sliding component 115, outer plate 12, second flow hole 121, first limiting groove 122, accommodating groove 123, ball 124, connecting rod 13, rod body 131, annular protrusion 132, screw 2. DETAILED DESCRIPTION

[0023] Example 1, specifically as Figure 1-Figure 3 shown.

[0024] like Figure 1 As shown, a spliced joint suitable for a single-screw flowmeter includes an inner plate 11 and an outer plate 12 arranged in sequence from the inside to the outside, with a gap left between the inner plate 11 and the outer plate 12.

[0025] Both the inner plate 11 and the outer plate 12 are cylindrical, with their axes aligned. The inner plate 11 has a smaller diameter than the outer plate 12. The inner plate 11 has two symmetrical first flow holes 111, and the outer plate 12 has two symmetrical second flow holes 121. It is important to note that the first and second flow holes 111, 121 are both circular-arc groove-shaped and identical in size, allowing them to completely overlap. Furthermore, the outer plate 12 is threaded on its exterior to facilitate installation and securement of the entire connector 1.

[0026] Two opposing limiting holes 112 are formed on the outer edge of the inner plate 11, and the limiting holes 112 are located between the first circulation holes 111. Two opposing first limiting grooves 122 are formed on the outer edge of the outer plate 12, and the first limiting grooves 122 are located between the second circulation holes 121. When the limiting holes 112 and the first limiting grooves 122 are aligned, the first circulation holes 111 and the second circulation holes 121 are aligned and overlap.

[0027] The inner plate 11 and the outer plate 12 are connected by a connecting rod 13. Figure 2 As shown, the connecting rod 13 includes a rod body 131 and an annular protrusion 132 located in the middle of the rod body 131. The connecting rod 13 is demarcated by the annular protrusion 132. The diameter of the inner end of the connecting rod 13 is consistent with the inner diameter of the limiting hole 112, and the diameter of the outer end of the connecting rod 13 is consistent with the inner diameter of the first limiting groove 122. The inner end of the connecting rod 13 extends into the limiting hole 112, and the two are slidably connected. The outer end of the connecting rod 13 extends into the first limiting groove 122, and the two are slidably connected. The inner and outer sides of the annular protrusion 132 respectively abut against the inner plate 11 and the outer plate 12. The connecting rod 13 connects the inner plate 11 and the outer plate 12, and ensures that there is a gap between the inner plate 11 and the outer plate 12.

[0028] A screw connection hole 113 is formed at the center of the inner plate 11, and a hemispherical receiving groove 123 is formed at the center of the side of the outer plate 12 facing the inner plate 11. The receiving groove 123 is directly opposite the screw connection hole 113, and a ball 124 is rollingly connected in the receiving groove 123, and the ball 124 can be detached from the receiving groove 123. A screw 2 is provided in the screw connection hole 113, and the axis of the screw 2 coincides with the axis of the screw connection hole 113. An annular sliding component 115 is provided between the screw 2 and the screw connection hole 113, and the end of the sliding component 115 away from the outer plate 12 is exposed outside the screw connection hole 113. In this embodiment, the sliding component 115 can be a sleeve or a bearing. Taking the sleeve as an example, during installation, the outer wall of the sleeve has an interference fit with the screw connection hole 113, and the inner wall of the sleeve has a clearance fit with the screw 2. The sliding member 115 not only positions the screw 2, making installation of the screw 2 more convenient, but also reduces friction between the screw 2 and the inner plate 11, effectively ensuring the normal rotation of the screw 2 and the service life of the entire flow meter. The screw 2 passes through the screw connection hole 113 until the end face of the screw 2 abuts against the ball 124, and the two form point contact.

[0029] By setting up a spliced joint 1, when the fluid with filler passes through the flow meter, tiny fillers will inevitably enter the gap between the screw 2 and the sliding part 115. Since the screw 2 and the sliding part 115 pass through the entire inner plate 11, the filler entering the gap can be discharged from the other end of the screw connection hole 113 in a timely manner, fundamentally avoiding the phenomenon of the screw being unable to rotate normally due to excessive accumulation of filler, wear between the screw and the joint, or even getting stuck, thereby ensuring the metering accuracy and service life of the flow meter. In addition, the end face of the screw 2 is against the ball 124, and the ball 124 can provide a limiting support for the screw, and the contact between the two is point contact. The small contact surface can significantly reduce the friction resistance encountered by the screw 2 during rotation, thereby preventing wear on the end of the screw while reducing energy consumption. Example

[0030] like Figure 4 As shown, the difference from the first embodiment is that the end surface of the screw 2 facing the receiving groove 123 is an arc surface, and the vertex of the arc surface abuts against the ball 124 and forms a point contact. Example

[0031] In embodiment one, the limiting hole 112 on the inner plate 11 passes through the entire inner plate 11 in the thickness direction. Therefore, the filler in the fluid will also enter the gap between the connecting rod 13 and the limiting hole 112. When too much filler accumulates in the gap, the connecting rod 13 and the limiting hole 112 are stuck, which makes it inconvenient for the later maintenance of the joint 1.

[0032] like Figure 5 As shown, the difference from Example 1 is that, in this embodiment, the limiting hole 112 does not pass through the entire inner plate 11, thereby forming a second limiting groove 114 opening toward the outer plate 12. By forming a closed surface, the connecting rod 13 is prevented from contacting the filler, thereby ensuring the convenience of disassembly of the entire joint 1 during subsequent maintenance.

[0033] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A spliced joint suitable for a single screw flow meter, characterized in that: It includes an inner plate and an outer plate arranged sequentially from the inside to the outside, with a gap between the inner plate and the outer plate, two opposite limiting holes are opened on the outer edge of the inner plate, and two opposite first limiting grooves are opened on the outer edge of the outer plate. The inner plate and the outer plate are connected by a connecting rod, and the connecting rod includes a rod body and an annular protrusion located in the middle of the rod body. The inner end of the connecting rod is deep into the limiting hole, and the outer end of the connecting rod is deep into the first limiting groove. A screw connecting hole is opened at the center of the inner plate, and an accommodating groove is opened at the center of the side of the outer plate facing the inner plate. A ball is provided in the accommodating groove, a screw is provided in the screw connecting hole, and an annular sliding component is provided between the screw and the screw connecting holes. The end face of the screw is against the ball and the two form point contact.

2. The spliced joint suitable for a single screw flowmeter according to claim 1, characterized in that: The inner plate and the outer plate are both cylindrical, their axes coincide with each other, and the diameter of the inner plate is smaller than the diameter of the outer plate.

3. The spliced joint suitable for a single screw flowmeter according to claim 2, characterized in that: Two symmetrical first flow holes are opened on the inner plate, and two symmetrical second flow holes are opened on the outer plate. The first flow holes and the second flow holes are both in the shape of arc grooves and have the same size. When the limit hole is opposite to the first limit groove, the first flow hole and the second flow hole are opposite and overlap.

4. The spliced joint suitable for a single screw flow meter according to claim 3, characterized in that: The connecting rod is divided by an annular protrusion, the diameter of the inner end portion of the connecting rod is consistent with the inner diameter of the limiting hole, and the diameter of the outer end portion of the connecting rod is consistent with the inner diameter of the first limiting groove.

5. The spliced joint suitable for a single screw flow meter according to claim 4, characterized in that: The receiving groove is directly opposite to the screw connecting hole, a ball is rollingly connected in the receiving groove, and the ball can be separated from the receiving groove.

6. The spliced joint suitable for a single screw flowmeter according to claim 5, characterized in that: One end of the sliding component away from the outer plate is exposed outside the screw connecting hole, and the sliding component is a shaft sleeve.

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