Flowmeter with pore plate convenient to replace

By designing the storage groove and cover plate structure in the flowmeter, the problem of inconvenience in replacement or replacement after wear of orifice plates is solved, and the convenient replacement of orifice plates and the guarantee of metering accuracy is achieved.

CN223050685UActive Publication Date: 2025-07-01WENZHOU DAAN INSTR EQUIP CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422263112.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2025-07-01
Estimated Expiration
2034-09-14

AI Technical Summary

Technical Problem

The existing orifice type flowmeter cannot be replaced or replaced after wear, which affects the measurement accuracy.

Method used

A flowmeter is designed to facilitate replacement of orifice plates. By setting up a storage groove and a cover plate structure on the pipe body, the limiting and locking mechanism of the cover plate are used to achieve stable installation and convenient replacement of orifice plates.

Benefits of technology

It realizes convenient replacement of orifices, ensures the metering accuracy of the flowmeter during long-term use, and improves the sealing and operation convenience of the flowmeter.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223050685U_ABST
    Figure CN223050685U_ABST
Patent Text Reader

Abstract

The flow meter comprises a pipe body, a pressure taking pipe and the pore plate, a containing groove surrounding an inner hole of the pipe body is formed in the pipe body, a positioning part matched with the pore plate is formed on the lower portion of the containing groove, an opening part allowing the pore plate to penetrate through is formed in the upper portion of the containing groove and penetrates through the pipe body upwards, and the pressure taking pipe is arranged on the pressure taking pipe. The hole plate penetrates through the opening part to be arranged in the positioning part, a cover plate with the inner side face matched with the peripheral side face of the pipe body is arranged on the pipe body, one end of the cover plate is hinged to the pipe body, the other end of the cover plate is detachably connected with the pipe body, and a first limiting part with the thickness matched with that of the opening part and the inner side face matched with the hole plate is formed on the inner side face of the cover plate; the inner side face of the cover plate tightly abuts against the peripheral side face of the pipe body to shield a port of the opening part, and the first limiting part extends into the opening part to enable the inner side face of the first limiting part to tightly abut against the peripheral side face of the pore plate. According to the flow meter with the pore plate convenient to replace, the pore plate can be replaced very conveniently, and the flow meter can keep high metering precision in the using process.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, in particular to a flow meter facilitating orifice plate replacement. Background Art

[0002] The orifice plate flow meter is a differential pressure flow meter and is the most widely used flow meter. It mainly changes the flow velocity of the medium passing through the orifice plate, causing a pressure difference between the media on both sides of the orifice plate, and realizes the measurement of the medium flow through the pressure tapping pipes arranged on both sides of the orifice plate. In the prior art, the orifice plate is generally welded between the two end pipe bodies, or the orifice plate is clamped between the two end pipe bodies after the two pipe bodies are tightened by a flange ring. In the former structure, when the orifice plate is worn due to the erosion of the medium and the measurement accuracy decreases, the orifice plate cannot be replaced, and the whole orifice plate needs to be replaced. In the latter structure, multiple bolts need to be disassembled when replacing the orifice plate, which is inconvenient in operation.

[0003] In view of the above problems, the utility model is improved to provide a flow meter facilitating orifice plate replacement. Content of the Utility Model

[0004] The utility model provides a flow meter facilitating orifice plate replacement, which solves the above problems existing in the prior art during use.

[0005] The technical solution of the utility model is realized as follows:

[0006] A flow meter facilitating orifice plate replacement includes a pipe body, pressure tapping pipes and an orifice plate. A receiving groove surrounding the inner hole of the pipe body is formed on the pipe body. A positioning portion matching the orifice plate is formed at the lower part of the receiving groove. An opening portion allowing the orifice plate to pass through is formed at the upper part of the receiving groove and penetrates through the pipe body upward. The orifice plate passes through the opening portion and is placed in the positioning portion. A cover plate with an inner side surface matching the circumferential side surface of the pipe body is arranged on the pipe body. One end of the cover plate is hinged to the pipe body, and the other end is detachably connected to the pipe body. A first limiting portion with a thickness matching the opening portion and an inner side surface matching the orifice plate is formed on the inner side surface of the cover plate. The inner side surface of the cover plate tightly abuts against the circumferential side surface of the pipe body to cover the port of the opening portion. The first limiting portion extends into the opening portion so that the inner side surface of the first limiting portion tightly abuts against the circumferential side surface of the orifice plate.

[0007] Preferably, a locking screw is hinged on the circumferential side surface of the pipe body. A locking portion is formed at the end of the cover plate. A locking groove penetrating through the locking portion to one side and matching the locking screw is formed on the locking portion. After the locking screw swings and is inserted into the locking groove, a locking nut tightly abuts against the locking portion is screwed.

[0008] Preferably, a sealing ring groove surrounding the inner hole of the pipe body is formed on the side wall of the receiving groove. A sealing ring tightly abuts against the side surface of the orifice plate is arranged in the sealing ring groove.

[0009] Preferably, an operation groove penetrating upward through the pipe body is formed on each of the two side walls of the opening part. The bottom of the operation groove is lower than the circumferential side surface of the orifice plate, so that a part of the orifice plate protrudes above the bottom of the operation groove. Two second limiting parts which are respectively located on both sides of the first limiting part and are matched with the operation groove are formed on the inner side surface of the cover plate. The second limiting part is placed in the operation groove, and the inner side surface of the second limiting part abuts tightly against the bottom of the operation groove.

[0010] Preferably, a first sealing cushion layer abutting tightly against the circumferential side surface of the pipe body is arranged on the inner side surface of the cover plate.

[0011] Preferably, a second sealing cushion layer abutting tightly against the circumferential side surface of the orifice plate is arranged on the inner side surface of the first limiting part.

[0012] Preferably, a third sealing cushion layer abutting tightly against the bottom of the operation groove is arranged on the second limiting part.

[0013] In summary, the beneficial effects of the present utility model are as follows: The positioning part and the first limiting part play a limiting role on the orifice plate placed in the placement groove, so that the orifice plate is stably held in the placement groove to play a role in restricting flow and increasing speed, so as to realize the function of the flowmeter. When the orifice plate needs to be replaced, lift the cover plate, take out the old orifice plate from the placement groove, then place the new orifice plate into the placement groove, and then fasten the free end of the cover plate, thus realizing the replaceability of the orifice plate, so as to ensure the measurement accuracy of the flowmeter during long-term use, and the replacement operation of the orifice plate is very convenient and easy to operate. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a sectional schematic diagram of the present utility model;

[0017] Figure 3 is an exploded schematic diagram when the cover plate of the present utility model is opened;

[0018] Figure 4 is a structural schematic diagram of the pipe body in the present utility model;

[0019] Figure 5 is a structural schematic diagram of the cover plate in the present utility model.

[0020] In the figure: 1, pipe body; 11, accommodation groove; 111, positioning part; 112, opening part; 113, sealing ring groove; 114, operation groove; 12, locking screw; 13, locking nut; 14, sealing ring; 2, pressure-taking pipe; 3, orifice plate; 4, cover plate; 41, first limiting part; 42, locking part; 421, locking groove; 43, second limiting part; 44, first sealing cushion layer; 45, second sealing cushion layer; 46, third sealing cushion layer. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the attached Figures 1-5 , it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0022] As shown in the figure, a flowmeter for facilitating the replacement of the orifice plate 3 includes a pipe body 1, a pressure-taking pipe 2 and an orifice plate 3. A accommodation groove 11 surrounding the inner hole of the pipe body 1 is formed on the pipe body 1. The two pressure-taking pipes 2 are connected to the pipe body 1 and communicate with the inner hole of the pipe body 1 and are respectively located on both sides of the port of the accommodation groove 11. The orifice plate 3 is in the shape of a circular plate. A positioning part 111 matching the orifice plate 3 is formed at the lower part of the accommodation groove 11, that is, the positioning part 111 is in a semi-circular shape. An opening part 112 through which the orifice plate 3 can pass is formed at the upper part of the accommodation groove 11 and penetrates upward through the pipe body 1. The orifice plate 3 passes through the opening part 112 and is placed in the positioning part 111. A cover plate 4 with an inner side surface matching the circumferential side surface of the pipe body 1 is arranged on the pipe body 1, that is, the inner side surface of the cover plate 4 is in an arc shape; one end of the cover plate 4 is hinged to the pipe body 1, and the other end is detachably connected to the pipe body 1. A first limiting part 41 with a thickness matching the opening part 112 and an inner side surface matching the orifice plate 3 is formed on the inner side surface of the cover plate 4, that is, the inner side surface of the first limiting part 41 is in an arc shape. The inner side surface of the cover plate 4 abuts against the circumferential side surface of the pipe body 1 to shield the port of the opening part 112, and the first limiting part 41 extends into the opening part 112 so that the inner side surface of the first limiting part 41 abuts against the circumferential side surface of the orifice plate 3.

[0023] Specifically, the structure of the detachable connection between the end of the cover plate 4 and the pipe body 1: A locking screw 12 is hinged on the circumferential side surface of the pipe body 1. A locking part 42 is formed at the end of the cover plate 4. A locking groove 421 penetrating through the locking part 42 to one side and matching the locking screw 12 is formed on the locking part 42. After the locking screw 12 swings and is stuck into the locking groove 421, a locking nut 13 tightly abuting against the locking part 42 is screwed on the locking screw 12. The detachable connection between the end of the cover plate 4 and the pipe body 1 is realized through the cooperation of the locking nut 13 and the locking screw 12.

[0024] In the above embodiments, when the orifice plate 3 is placed within the positioning portion 111, the positioning portion 111 provides a limiting function for the orifice plate 3 in the axial direction of the pipe body 1. The first limiting portion 41 abuts tightly against the circumferential side surface of the orifice plate 3 to provide a limiting function for the orifice plate 3 in the radial direction of the pipe body 1, so that the orifice plate 3 is stably held within the receiving groove 11 and plays a role in restricting the flow rate and increasing the speed of the medium flowing through. The flow rate of the medium is measured by means of the pressure-taking pipe 2 in cooperation with the detection device. When it is necessary to replace the orifice plate 3, the locking nut 13 is loosened so that it moves away from the position where it tightly abuts against the locking portion 42, enabling the locking screw 12 to swing out of the locking groove 421, and enabling the end portion of the cover plate 4 to move freely. At this time, the cover plate 4 is lifted to expose the port of the opening portion 112, and the orifice plate 3 within the receiving groove 11 can be taken out after passing through the port of the opening portion 112. Then, a new orifice plate 3 is passed through the port of the opening portion 112 and placed within the positioning portion 111. Next, the cover plate 4 is covered, the locking screw 12 is swung and engaged within the locking groove 421, and then the locking nut 13 is tightened, and the replacement of the orifice plate 3 can be completed. It can be seen that this flowmeter that facilitates the replacement of the orifice plate 3 can replace the orifice plate 3 to ensure the measurement accuracy of the flowmeter during long-term use, and the operation of replacing the orifice plate 3 is very convenient and easy to operate.

[0025] Preferably, a sealing ring groove 113 surrounding the inner hole of the pipe body 1 is formed on the side wall of the receiving groove 11, and a sealing ring 14 that abuts tightly against the side surface of the orifice plate 3 is provided within the sealing ring groove 113. The sealing ring 14 is located between the side surface of the orifice plate 3 and the side wall of the receiving groove 11 to play a sealing role, thereby enhancing the sealing performance of the flowmeter.

[0026] Further, an operation groove 114 that penetrates upward through the pipe body 1 is formed on each of the two side walls of the opening portion 112. The bottom of the operation groove 114 is lower than the circumferential side surface of the orifice plate 3, such that a portion of the orifice plate 3 protrudes above the bottom of the operation groove 114. Two second limiting portions 43 that are respectively located on both sides of the first limiting portion 41 and are matched with the operation groove 114 are formed on the inner side surface of the cover plate 4. The second limiting portions 43 are placed within the operation groove 114, and the inner side surface of the second limiting portion 43 abuts tightly against the bottom of the operation groove 114.

[0027] In the above preferred embodiment, when the operation of replacing the orifice plate 3 is performed and the cover plate 4 is lifted to expose the port of the opening 112, since a part of the orifice plate 3 protrudes above the bottom of the operation groove 114, the part of the orifice plate 3 that protrudes above the bottom of the operation groove 114 is located between the two operation grooves 114, and there is a certain space on both sides of the part of the orifice plate 3 that protrudes above the bottom of the operation groove 114, which facilitates the operator to hold the part of the orifice plate 3 that protrudes above the bottom of the operation groove 114 by hand or tools to take out the orifice plate 3 from the receiving groove 11 or place the orifice plate 3 into the receiving groove 11, thereby further facilitating the operation when replacing the orifice plate 3. Moreover, when the inner sides of the two second limiting parts 43 are tightly abutted against the bottom of the operation groove 114, the side surfaces of the second limiting parts 43 are in contact with the side surfaces of the part of the orifice plate 3 that protrudes above the bottom of the operation groove 114, and the two second limiting parts 43 play a limiting role on the upper part of the orifice plate 3 along the axial direction of the pipe body 1, thereby enhancing the stability of the orifice plate 3 when placed in the receiving groove 11.

[0028] Preferably, a first sealing cushion layer 44 that tightly abuts against the circumferential side surface of the pipe body 1 is provided on the inner side surface of the cover plate 4, a second sealing cushion layer 45 that tightly abuts against the circumferential side surface of the orifice plate 3 is provided on the inner side surface of the first limiting part 41, and a third sealing cushion layer 46 that tightly abuts against the bottom of the operation groove 114 is provided on the second limiting part 43. The first sealing cushion layer 44 is located between the inner side surface of the cover plate 4 and the circumferential surface of the pipe body 1 to play a sealing role, the second sealing cushion layer 45 is located between the inner side surface of the first limiting part 41 and the circumferential surface of the orifice plate 3 to play a sealing role, and the third sealing cushion layer 46 is located between the second limiting part 43 and the bottom of the operation groove 114 to play a sealing role, thereby enhancing the overall sealing performance of the flowmeter.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A flow meter with an orifice plate (3) that is easy to replace, comprising a pipe body (1), a pressure-taking pipe (2) and an orifice plate (3), characterized in that: The tube body (1) is provided with a receiving groove (11) surrounding the inner hole of the tube body (1); a positioning portion (111) matching the orifice plate (3) is formed at the lower portion of the receiving groove (11); an opening portion (112) is formed at the upper portion of the receiving groove (11) penetrating upward through the tube body (1) to allow the orifice plate (3) to pass through; the orifice plate (3) passes through the opening portion (112) and is placed in the positioning portion (111); the tube body (1) is provided with a cover plate (4) whose inner side surface matches the peripheral side surface of the tube body (1); One end of the cover plate (4) is hinged to the tube body (1), and the other end is detachably connected to the tube body (1). A first limiting portion (41) having a thickness matching that of the opening portion (112) and an inner side matching that of the orifice plate (3) is formed on the inner side surface of the cover plate (4). The inner side surface of the cover plate (4) is tightly pressed against the peripheral side surface of the tube body (1) to shield the port of the opening portion (112). The first limiting portion (41) extends into the opening portion (112) so that the inner side surface of the first limiting portion (41) is tightly pressed against the peripheral side surface of the orifice plate (3).

2. The flow meter with easy replacement of orifice plate (3) according to claim 1, characterized in that: A locking screw (12) is hingedly connected to the side surface of the tube body (1); a locking portion (42) is formed at the end of the cover plate (4); a locking groove (421) is formed on the locking portion (42) and passes through the locking portion (42) to one side and matches the locking screw (12); after the locking screw (12) is swung and inserted into the locking groove (421), it is threadedly connected to a locking nut (13) that is tightly pressed against the locking portion (42).

3. The flow meter with easy replacement of orifice plate (3) according to claim 2, characterized in that: A sealing ring groove (113) surrounding the inner hole of the tube body (1) is provided on the side wall of the receiving groove (11), and a sealing ring (14) is provided in the sealing ring groove (113) and is tightly pressed against the side surface of the orifice plate (3).

4. The flow meter with easy replacement of orifice plate (3) according to claim 3, characterized in that: An operating groove (114) is formed on each of the two side walls of the opening (112) and passes through the tube body (1) upwards; the bottom of the operating groove (114) is lower than the peripheral side surface of the orifice plate (3), so that the orifice plate (3) is partially higher than the bottom of the operating groove (114); and two second limiting portions (43) are formed on the inner side surface of the cover plate (4), which are respectively located on both sides of the first limiting portion (41) and match the operating groove (114); the second limiting portion (43) is placed in the operating groove (114) and the inner side surface of the second limiting portion (43) is tightly against the bottom of the operating groove (114).

5. The flow meter with easy replacement of orifice plate (3) according to claim 4, characterized in that: The inner side surface of the cover plate (4) is provided with a first sealing gasket layer (44) which is tightly pressed against the peripheral side surface of the tube body (1).

6. The flow meter with easy replacement of orifice plate (3) according to claim 5, characterized in that: A second sealing pad layer (45) is provided on the inner side surface of the first limiting portion (41) and is tightly pressed against the peripheral side surface of the orifice plate (3).

7. The flow meter with easy replacement of orifice plate (3) according to claim 6, characterized in that: The second limiting portion (43) is provided with a third sealing pad layer (46) which is tightly against the bottom of the operating groove (114).