Anti-corrosion and sealing structure of instrument threaded flange

Abstract

An anti-corrosion and sealing structure of an instrument threaded flange is characterized by comprising a disc body A, a groove is formed in the disc body A, internal threads are arranged in the groove of the disc body A, a disc body B is arranged below the disc body A, a protruding column is arranged on the surface of the disc body B, external threads are arranged on the protruding column of the disc body B, a first O-shaped ring is arranged in the disc body B, and a second O-shaped ring is arranged in the disc body B. A third O-shaped ring is arranged in the disc body B; compared with the prior art, the PTFE disc body has the advantages that the problem that part of instruments corrode a measured medium is solved, the sealing performance is improved, a PTFE welding process can be adopted at the joint of the PTFE disc body and the instrument PTFE sleeve if special requirements exist, and the PTFE disc body is used for enhancing the pressure-bearing performance, so that the PTFE disc body can be widely applied to the fields of petroleum, chemical engineering and the like with anti-corrosion sealing performance requirements, and the requirement for reducing the purchase cost of an enterprise can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of corrosion protection and sealing of measuring instruments, in particular to an corrosion protection and sealing structure of an instrument threaded flange. Background Art

[0002] Instruments can improve, expand or supplement human functions. People use their sense organs to see, hear, taste and touch external things, and instruments such as microscopes, telescopes, sound level meters, acidity meters, pyrometers, vacuum centrifugal concentrators, etc. can improve and expand these functions of people; in addition, some instruments such as magnetometers and ray counters can sense and measure physical quantities that human sense organs cannot sense, and some instruments can exceed human capabilities to record, calculate and count, such as high-speed cameras and computers. There is an existing instrument with a PTFE sleeve seal in the middle of the measuring rod, so the measurement medium can meet the requirements of corrosion protection and sealing, but the threads on the upper part of the PTFE sleeve and the instrument body are exposed stainless steel structures, which cannot meet the requirements of corrosion protection. Since the instrument itself is a threaded structure and the equipment flange is connected by threads, the sealing requirements cannot be met. The middle of the measuring instrument is a measuring rod and the surface has an anti-corrosion PTFE sleeve. Since the root and the upper part of the threaded part of the instrument body are made of stainless steel, it will be partially exposed to the measured medium during process connection and use, causing corrosion and even medium leakage. In order to solve the above problems, an anti-corrosion and sealing structure of an instrument threaded flange is proposed. Utility Model Content

[0003] In view of the above existing technical problems, the utility model provides an anti-corrosion and sealing structure of an instrument threaded flange, which is characterized by comprising a disc body A, a disc body B, an internal thread, an external thread, a first O-ring, a second O-ring, and a third O-ring, wherein the disc body A has a groove, the groove of the disc body A is provided with an internal thread, the disc body B is provided below the disc body A, the surface of the disc body B has a convex column, the convex column of the disc body B has an external thread, the disc body B is provided with a first O-ring, the disc body B is provided with a second O-ring, and the disc body B is provided with a third O-ring;

[0004] Further, the disc body A is made of stainless steel, the disc body B is made of PTFE, the disc body A and the disc body B are connected by internal threads and external threads, the groove of the disc body A is located at the center of the disc body A, the groove of the disc body A is circular, and there is an opening at the center of the groove, the convex column of the disc body B is located at the center of the disc body B, and there is an opening at the center of the convex column, and the opening of the convex column corresponds to the opening of the groove of the disc body A;

[0005] Furthermore, the boss opening of the disk body B has three annular grooves therein, and the three annular grooves are evenly arranged on the inner wall of the boss opening of the disk body B.

[0006] Beneficial effects of the utility model:

[0007] The utility model inserts the instrument from the upper part of the opening of the disk body A into the central opening of the convex column of the disk body B, extends into the three annular grooves in the middle, and connects and tightens the internal thread on the disk body A with the external thread of the instrument, so that the lower part of the instrument thread and the convex column part of the disk body B are compressed and sealed by the first O-ring, and the measuring rod with the PTFE sleeve in the middle of the instrument achieves a sealing effect through the tight fit between the disk body B and the first O-ring and the second O-ring, so that when the measuring rod measures the measured medium, it will not overflow through the upper part of the PTFE rod, solves the problem of some instruments being corrosive to the measured medium, and increases the sealing performance. If there are special requirements, the PTFE welding process can be adopted at the interface between the PTFE disk body and the PTFE sleeve of the instrument to enhance the pressure-bearing performance. Therefore, it can be widely used in fields with corrosion resistance and sealing requirements such as petroleum and chemical industry, and can also achieve the requirement of reducing the procurement cost of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the overall structure of an anti-corrosion and sealing structure of an instrument threaded flange of the utility model;

[0009] Figure 2 This is a schematic diagram of the split structure of the anti-corrosion and sealing structure of an instrument threaded flange of the utility model;

[0010] Figure 3 It is a schematic diagram of the use of an anti-corrosion and sealing structure of an instrument threaded flange of the utility model;

[0011] As shown in the figure: 1 disk body A, 2 disk body B, 3 internal thread, 4 external thread, 5 first O-ring, 6 second O-ring, 7 third O-ring, 8 measuring instrument. DETAILED DESCRIPTION

[0012] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0014] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, the technical features involved in the different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0015] Example 1

[0016] The utility model provides an anti-corrosion and sealing structure of an instrument threaded flange, which is characterized by comprising a disc body A1, a disc body B2, an internal thread 3, an external thread 4, a first O-ring 5, a second O-ring 6, and a third O-ring 7. The disc body A1 has a groove, the internal thread 3 is arranged in the groove of the disc body A1, the disc body B2 is arranged below the disc body A1, a convex column is arranged on the surface of the disc body B2, the external thread 4 is arranged on the convex column of the disc body B2, the first O-ring 5 is arranged in the disc body B2, the second O-ring 6 is arranged in the disc body B2, and the third O-ring 7 is arranged in the disc body B2;

[0017] Further, the disc body A1 is made of stainless steel, the disc body B2 is made of PTFE, the disc body A1 and the disc body B2 are connected by an internal thread 3 and an external thread 4, the groove of the disc body A1 is located at the center of the disc body A1, the groove of the disc body A1 is circular, and there is an opening at the center of the groove, the convex column of the disc body B2 is located at the center of the disc body B2, and there is an opening at the center of the convex column, and the opening of the convex column corresponds to the opening of the groove of the disc body A1;

[0018] Furthermore, there are three annular grooves in the convex column opening of the disk body B2, and the three annular grooves are evenly arranged on the inner wall of the convex column opening of the disk body B2.

[0019] Example 2

[0020] When in use, the middle of the measuring instrument 8 is a measuring rod with an anti-corrosion PTFE sleeve on the surface. The instrument is inserted from the upper part of the opening of the disk body A1 into the central opening of the convex column of the disk body B2, and extends into the three annular grooves in the middle. The internal thread 3 on the disk body A1 is connected and tightened with the external thread 4 of the instrument, so that the lower part of the instrument thread and the convex column part of the disk body B2 are compressed and sealed by the first O-ring 5. The measuring rod with a PTFE sleeve in the middle of the instrument achieves a sealing effect through the tight fit between the disk body B2 and the first O-ring 5 and the second O-ring 6, so that the measuring rod will not overflow through the upper part of the PTFE rod when measuring the measured medium; if the pressure of the on-site working conditions is high, PTFE welding can be performed through the lower edge of the installed disk body B2 and the PTFE sleeve of the measuring rod, thereby meeting the dual requirements of sealing and pressure.

[0021] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An anti-corrosion and sealing structure for an instrument threaded flange, characterized in that The invention comprises a disk body A, a disk body B, an internal thread, an external thread, a first O-ring, a second O-ring and a third O-ring. The disk body A has a groove, the groove of the disk body A has an internal thread, the disk body B is arranged below the disk body A, the surface of the disk body B has a convex column, the convex column of the disk body B has an external thread, the disk body B has a first O-ring, the disk body B has a second O-ring and the disk body B has a third O-ring.

2. The anti-corrosion and sealing structure of an instrument threaded flange according to claim 1, characterized in that: The disk body A is made of stainless steel, and the disk body B is made of PTFE. The disk body A and the disk body B are connected by internal threads and external threads. The groove of the disk body A is located at the center of the disk body A. The groove of the disk body A is circular, and there is an opening at the center of the groove. The convex column of the disk body B is located at the center of the disk body B, and there is an opening at the center of the convex column. The opening of the convex column corresponds to the opening of the groove of the disk body A.

3. The anti-corrosion and sealing structure of an instrument threaded flange according to claim 2, characterized in that: The convex column opening of the disk body B is provided with three annular grooves, and the three annular grooves are evenly arranged on the inner wall of the convex column opening of the disk body B.

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