Plug-in type electromagnetic flowmeter capable of being plugged on line

Abstract

The utility model relates to the technical field of instruments and meters, in particular to a plug-in type electromagnetic flowmeter capable of being plugged on line, which comprises a flowmeter body and a plug-in mechanism, the plug-in mechanism comprises a welding base, a ball valve and an upper sealing connecting seat, and the upper sealing connecting seat is arranged above the welding base. The ball valve is fixedly arranged between the upper sealing connecting seat and the welding base, a probe is fixedly arranged at the lower end of the flow meter body through a probe rod, an upper locking cap is slidably arranged at the position, located on the upper side of the upper sealing connecting seat, of the rod wall of the probe rod, and the side wall of the upper locking cap is fixedly connected with the rod wall of the probe rod through a plurality of locking screws. According to the utility model, the upper sealing connecting seat with a proper height is arranged and is matched with the limiting check ring on the probe rod to realize insertion limiting and blowout prevention of the probe rod, the three sealing designs enable the sealing to be more reliable and not easy to leak after installation, the flowmeter can be smoothly inserted and pulled on line, the leakage is not easy, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, and particularly relates to an insert type electromagnetic flowmeter that can be plugged and unplugged online. Background Technique

[0002] The electromagnetic flowmeter is a new type of flow measurement instrument that developed rapidly with the development of electronic technology in the 1950s and 1960s. The electromagnetic flowmeter applies the principle of electromagnetic induction and measures the flow rate of conductive fluid according to the electromotive force induced when the conductive fluid passes through an externally applied magnetic field.

[0003] At present, most of the existing insert type electromagnetic flowmeters are provided with an anti-blowout structure at the connection between the probe and the probe rod. Since the upper part of the probe rod needs to be provided with a sealing surface for the sealing gasket, the through hole of the upper sealing connection seat is small and the length is short, so that the insert type electromagnetic probe rod is blocked by the upper sealing connection seat and cannot be pulled out during disassembly. Moreover, when disassembling, since the upper locking seat needs to be loosened, the only sealing structure in the existing technology will fail, and the medium will leak out during plugging and unplugging. And canceling the anti-blowout device has the risk of being blown out by the medium, threatening the safety of people and instruments. Therefore, we have developed an insert type electromagnetic flowmeter that can be plugged and unplugged online. Content of the Utility Model

[0004] The purpose of the utility model is to provide an insert type electromagnetic flowmeter that can be plugged and unplugged online. By setting an upper sealing connection seat with a suitable height and cooperating with the limit retaining ring on the probe rod, the insertion limit and anti-blowout of the probe rod can be realized. The three-seal design can make the seal more reliable after installation, not easy to leak, the flowmeter can be smoothly plugged and unplugged online, and is not easy to leak, with a wide range of applications, so as to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An insert type electromagnetic flowmeter that can be plugged and unplugged online, including a flowmeter body and a plugging and unplugging mechanism. The plugging and unplugging mechanism includes a welding base, a ball valve and an upper sealing connection seat. The upper sealing connection seat is arranged above the welding base. The ball valve is fixedly arranged between the upper sealing connection seat and the welding base. The lower end of the flowmeter body is fixedly provided with a probe through a probe rod. An upper locking cap is slidably arranged on the rod wall of the probe rod above the upper sealing connection seat. The side wall of the upper locking cap is fixedly connected with the rod wall of the probe rod through a plurality of locking screws. The top of the upper sealing connection seat is provided with a sealing groove that cooperates with the upper locking cap. An upper sealing ring is fixedly arranged in the sealing groove. The lower side of the upper sealing connection seat is provided with an anti-blowout mechanism that can be plugged and unplugged online.

[0007] Preferably, the anti-blowout mechanism includes an O-ring seal. An O-ring groove is formed on the lower side of the upper sealing connection seat. The O-ring seal is arranged in the O-ring groove, and the inner side of the O-ring seal abuts against the rod wall of the probe rod.

[0008] Preferably, a limit retaining ring is welded to the rod wall of the probe rod above the O-ring groove, and a sliding groove matching the limit retaining ring is formed in the through hole of the upper sealing connection seat.

[0009] Preferably, a lower sealing ring is fixedly arranged at the lower end of the limit retaining ring.

[0010] Preferably, the aperture of the through hole on the upper side of the upper sealing connection seat is larger than the diameter of the limit retaining ring.

[0011] Preferably, the diameter of the probe is the same as that of the probe rod.

[0012] Preferably, the ball valve is an internal thread ball valve.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] For the pluggable in-line insertion type electromagnetic flowmeter, by arranging an O-ring groove at the lower part of the upper sealing connection seat and using an O-ring seal to solve the problem of sealing between the probe and the upper sealing connection seat, by welding a limit retaining ring at a proper position on the probe rod, the problems of preventing the medium from being blown out and limiting the insertion depth can be solved. By arranging a lower sealing ring under the limit retaining ring, secondary sealing is achieved, and the problem of unreliable sealing is solved. By arranging an upper sealing connection seat with a proper height and cooperating with the limit retaining ring on the probe rod, the insertion limit and anti-blowout of the probe rod can be realized. The three-way sealing design can make the sealing more reliable after installation, not easy to leak, the flowmeter can be smoothly plugged in and out online, and is not easy to leak, with a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a pluggable in-line insertion type electromagnetic flowmeter.

[0016] Figure 2 It is a schematic side view structural diagram of a pluggable in-line insertion type electromagnetic flowmeter.

[0017] Figure 3 It is Figure 2 an enlarged schematic view of a partial A part in

[0018] Figure 4 It is Figure 2 an enlarged schematic view of a partial B part in

[0019] In the figure: 1. Probe; 2. Probe rod; 3. Welding base; 4. Ball valve; 5. Upper sealing connection seat; 6. Direction mark; 7. Flowmeter body; 8. Locking screw; 9. Upper locking cap; 10. Upper sealing ring; 11. Limit retaining ring; 12. Lower sealing ring; 13. O-ring seal. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, 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 creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figures 1 to 4 , the present invention provides a technical solution:

[0022] An insertable electromagnetic flowmeter that can be plugged and unplugged online, comprising a flowmeter body 7 and a plugging and unplugging mechanism. The plugging and unplugging mechanism includes a welding base 3, a ball valve 4, and an upper sealing connection seat 5. The upper sealing connection seat 5 is arranged above the welding base 3, and the ball valve 4 is fixedly arranged between the upper sealing connection seat 5 and the welding base 3. The ball valve 4 is an internal thread ball valve, which has a simple structure, a small volume, and a light weight. The lower end of the flowmeter body 7 is fixedly provided with a probe 1 through a probe rod 2. A upper locking cap 9 is slidably arranged on the rod wall of the probe rod 2 above the upper sealing connection seat 5. The side wall of the upper locking cap 9 is fixedly connected to the rod wall of the probe rod 2 through a plurality of locking screws 8. The top of the upper sealing connection seat 5 is provided with a sealing groove that cooperates with the upper locking cap 9, and an upper sealing ring 10 is fixedly arranged in the sealing groove. The lower side of the upper sealing connection seat 5 is provided with an anti-blowout mechanism that can be plugged and unplugged online.

[0023] The anti-blowout mechanism includes an O-ring seal 13. An O-ring groove is opened on the lower side of the upper sealing connection seat 5, and the O-ring seal 13 is arranged in the O-ring groove. The inner side of the O-ring seal 13 abuts against the rod wall of the probe rod 2. By arranging an O-ring groove at the lower part of the upper sealing connection seat 5, the problem of sealing between the probe 1 and the upper sealing connection seat 5 is realized by using the O-ring seal 13.

[0024] A limit retaining ring 11 is welded on the rod wall of the probe rod 2 above the O-ring groove. A sliding groove that cooperates with the limit retaining ring 11 is opened in the through hole of the upper sealing connection seat 5. By welding the limit retaining ring 11 at a suitable position on the probe rod 2, the problems of preventing the medium from blowing out and limiting the insertion depth can be realized.

[0025] A lower sealing ring 12 is fixedly provided at the lower end of the limit retaining ring 11. After the locking screw 8 locks the upper locking cap 9 to the rod wall of the probe rod 2, the probe rod 2 will drive the limit retaining ring 11 to push downward. By arranging the lower sealing ring 12 under the limit retaining ring 11, secondary sealing is achieved, solving the problem of unreliable sealing.

[0026] The aperture of the upper through-hole on the upper sealing connection seat 5 is larger than the diameter of the limit retaining ring 11. The upper through-hole of the upper sealing connection seat 5 allows the limit retaining ring 11 to pass through, facilitating the insertion of the probe rod 2 and the probe 1.

[0027] The diameter of the probe 1 is the same as that of the probe rod 2, which facilitates the probe 1 to pass through the sealing structure.

[0028] By setting the upper sealing connection seat 5 with an appropriate height and cooperating with the limit retaining ring 11 on the probe rod 2, the insertion limit and anti-blowout of the probe rod 2 can be achieved. The three-way sealing design can make the sealing more reliable after installation, not easy to leak, the flowmeter can be smoothly inserted and pulled out online, and is not easy to leak, with a wide range of applications.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online pluggable electromagnetic flowmeter, comprising a flowmeter body (7) and a plug-in mechanism, characterized in that: The plug-in and pull-out mechanism comprises a welding base (3), a ball valve (4) and an upper sealing connection seat (5), wherein the upper sealing connection seat (5) is arranged above the welding base (3), and the ball valve (4) is fixedly arranged between the upper sealing connection seat (5) and the welding base (3). The lower end of the flow meter body (7) is fixedly provided with a probe (1) via a probe rod (2), and an upper locking cap (9) is slidably provided on the rod wall of the probe rod (2) located on the upper side of the upper sealing connection seat (5), and the side wall of the upper locking cap (9) is fastened to the rod wall of the probe rod (2) via a plurality of locking screws (8), and a sealing groove matching with the upper locking cap (9) is provided at the top of the upper sealing connection seat (5), and an upper sealing ring (10) is fixedly arranged in the sealing groove, and an anti-blow-out mechanism which can be plugged and unplugged online is provided on the lower side of the upper sealing connection seat (5).

2. The online pluggable insertion electromagnetic flowmeter according to claim 1 is characterized in that: The anti-blowout mechanism comprises an O-type sealing ring (13), an O-type groove is formed on the lower side of the upper sealing connection seat (5), the O-type sealing ring (13) is arranged in the O-type groove, and the inner side of the O-type sealing ring (13) abuts against the rod wall of the probe rod (2).

3. The online pluggable insertion electromagnetic flowmeter according to claim 1 is characterized in that: A limit retaining ring (11) is welded to the rod wall of the probe rod (2) on the upper side of the O-shaped groove, and a sliding groove matching the limit retaining ring (11) is provided in the through hole of the upper sealing connection seat (5).

4. The online pluggable insertion electromagnetic flowmeter according to claim 3 is characterized in that: A lower sealing ring (12) is fixedly provided at the lower end of the limit stop ring (11).

5. The online pluggable insertion electromagnetic flowmeter according to claim 1 or 3, characterized in that: The diameter of the through hole on the upper side of the upper sealing connection seat (5) is larger than the diameter of the limit retaining ring (11).

6. The online pluggable insertion electromagnetic flowmeter according to claim 1, characterized in that: The diameter of the probe (1) is the same as the diameter of the probe rod (2).

7. The online pluggable insertion electromagnetic flowmeter according to claim 1 is characterized in that: The ball valve (4) is an internally threaded ball valve.

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