Corrosion-resistant high-pressure stop valve rod

Abstract

The utility model discloses a corrosion-resistant high-pressure stop valve rod which comprises a first rod end, a positioning groove, a connecting piece, a threaded rod, a second rod end, a second positioning groove and a second connecting piece. The valve rod body is made of 17-4 stainless steel, has high corrosion resistance and high temperature resistance after being subjected to high-temperature heat treatment, can stably operate in a severe environment, is suitable for various working condition environments, and overcomes the defects that an existing valve rod material is poor in corrosion resistance and high temperature resistance, and the service life of the valve rod is prolonged. The detachable valve rod is arranged to achieve repeated utilization of undamaged parts when the working performance is unstable, the connecting piece and the second connecting piece which are fixed to the left end and the right end of the threaded rod are embedded into the first rod end and the second rod end correspondingly to achieve assembly, the square connecting channel is utilized to enhance the connecting stability, and the detachable valve rod can be assembled to achieve stable connection. And the seriously damaged threaded rod can be conveniently replaced, and the use flexibility is improved.

Description

Technical Field

[0001] The utility model relates to the relevant fields of high-pressure valves and high-pressure pipe valve parts, and in particular to a corrosion-resistant high-pressure stop valve stem. Background Art

[0002] The opening and closing parts of the high-pressure stop valve are plug-shaped valve discs with flat or conical sealing surfaces. The valve disc moves in a straight line along the center line of the fluid. The movement of the valve stem can be either a lifting rod type (the valve stem rises and falls, but the handwheel does not rise or fall) or a lifting rotating rod type (the handwheel rotates and rises with the valve stem, and the nut is located on the valve body). The stop valve is only suitable for full opening and full closing, and adjustment and throttling are not allowed.

[0003] The Chinese patent with patent number CN201220721446.X discloses "A valve stem for a high-temperature and high-pressure stop valve". By using a rotating valve ball to replace the existing conical valve stem head, in addition to having the advantages of the existing conical valve stem head such as simple structure, easy manufacturing and maintenance, small working stroke, short opening and closing time, it can also improve the valve's sealing, impact resistance, corrosion resistance, and operational reliability in high-temperature and high-pressure environments.

[0004] This structure has certain advantages, but still has some shortcomings:

[0005] The valve stem of high-pressure globe valves is currently mostly made of stainless steel materials such as 2Cr13, which have poor corrosion resistance and high temperature resistance, unstable working performance, and when severe wear occurs on the threads of the valve stem, the entire valve stem needs to be replaced, which is a waste of overall resources and the flexibility of use needs to be strengthened. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a corrosion-resistant high-pressure stop valve stem.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a corrosion-resistant high-pressure stop valve stem, comprising a first rod end, a positioning groove, a connecting piece, a threaded rod, a second rod end, a second positioning groove, and a second connecting piece;

[0008] A positioning groove is provided at the right end of the first rod end;

[0009] The left end of the connecting member is embedded in the positioning groove and is locked and fixed with the first rod end by bolts;

[0010] The left and right ends of the threaded rod are respectively fixed to the connecting member and the second connecting member;

[0011] A second positioning groove is formed at the left end of the second rod end;

[0012] The right end of the second connecting member is embedded in the second positioning groove and is locked and fixed with the second rod end by bolts.

[0013] Preferably, the connecting member includes a connecting seat and a positioning block, the right end of the connecting seat is fixed to the positioning block, the positioning block is embedded in the interior of the positioning groove, and the connecting seat is locked and fixed to the first rod end by bolts.

[0014] It is further preferred that the cross-sections of the positioning groove and the second positioning groove are both rectangular, and the grooves of the square structure are matched with the positioning blocks to achieve a stable connection between the first rod end, the threaded rod and the second rod end, thereby improving the connection strength and achieving stable operation.

[0015] It is further preferred that the structure of the connecting member is consistent with the structure of the second connecting member, and both play a role in strengthening and stabilizing the connection.

[0016] In a further preferred embodiment, the outer side of the positioning block is sleeved with multiple sets of sealing rings to strengthen the sealing connection.

[0017] In a further preferred embodiment, the cross section of the connecting seat is concave, so as to facilitate docking with the first rod end for a fitting connection.

[0018] It is further preferred that the outer diameter of the connecting seat is consistent with the diameter of the first rod end, thereby ensuring the consistency of the diameter of the valve stem except the threaded rod.

[0019] It is further preferred that the valve stem is made of 17-4 stainless steel throughout, and after high-temperature heat treatment, it has high corrosion resistance and high temperature resistance.

[0020] Beneficial effects of the utility model:

[0021] The valve stem in the utility model is made of 17-4 stainless steel throughout. After high-temperature heat treatment, it has high corrosion resistance and high temperature resistance. It can operate stably in harsh environments and is suitable for various working conditions. It overcomes the current valve stem 2Cr13 and other stainless steel materials with poor corrosion resistance and high temperature resistance and unstable working performance.

[0022] The utility model realizes the reuse of undamaged parts by providing a detachable valve stem, and the assembly is realized by respectively embedding the connecting pieces fixed at the left and right ends of the threaded rod and the second connecting piece into the first rod end and the second rod end, and utilizes a square connecting channel to enhance the stability of the connection. The detachable and assembleable valve stem facilitates the replacement of a severely damaged threaded rod, thereby improving the flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0026] Figure 4 It is a schematic diagram of the enlarged structure of the connection details of the connector of the utility model;

[0027] Figure 5 It is a three-dimensional structural schematic diagram of the connecting piece of the utility model.

[0028] Among them: the first rod end-1, the positioning groove-2, the connecting piece-3, the threaded rod-4, the second rod end-5, the second positioning groove-6, the second connecting piece-7, the connecting seat-31, and the positioning block-32. DETAILED DESCRIPTION

[0029] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0030] See also Figure 1-4 The utility model provides a corrosion-resistant high-pressure stop valve stem, comprising a first rod end 1, a positioning groove 2, a connecting piece 3, a threaded rod 4, a second rod end 5, a second positioning groove 6, and a second connecting piece 7; the right end of the first rod end 1 is provided with a positioning groove 2; the left end of the connecting piece 3 is embedded in the interior of the positioning groove 2, and is locked and fixed with the first rod end 1 by bolts; the left and right ends of the threaded rod 4 are respectively fixed with the connecting piece 3 and the second connecting piece 7; the left end of the second rod end 5 is provided with a second positioning groove 6; the right end of the second connecting piece 7 is embedded in the second positioning groove 6, and is locked and fixed with the second rod end 5 by bolts.

[0031] In this embodiment, the cross-sections of the positioning groove 2 and the second positioning groove 6 are both rectangular. The square structure of the groove is matched with the positioning block 32 to achieve a stable connection between the first rod end 1, the threaded rod 4, and the second rod end 5, avoiding loose connection caused by rotation, improving the connection strength, and achieving stable operation. The structure of the connecting piece 3 is consistent with the structure of the second connecting piece 7, both of which play a role in strengthening the stable connection. The valve stem is made of a 17-4 stainless steel material. After high-temperature heat treatment, it has high corrosion resistance and high temperature resistance, which solves the durability of current stainless steels such as 2Cr13 and can operate stably in harsh environments. It is widely used in petroleum, chemical industry, aerospace and other fields.

[0032] Among them, in order for 17-4 stainless steel to have high strength, corrosion resistance and high temperature resistance after high-temperature heat treatment, it needs to be subjected to solid solution treatment and aging hardening treatment; solid solution treatment is to heat the alloy to a high temperature so that the alloy elements are completely dissolved in the matrix, and then rapidly cool it to prevent the appearance of precipitation phases, and aging hardening treatment is to heat the alloy in the solid solution state to a lower temperature again to form a precipitation hardening phase, thereby improving hardness and strength. Through the combination of these two heat treatment processes, 17-4 stainless steel can maintain high strength, corrosion resistance and high temperature resistance at high temperatures.

[0033] In addition, when 17-4 stainless steel is subjected to high-temperature heat treatment, it is necessary to control the heating and cooling rates to avoid deformation or cracking of the material. At the same time, it is also necessary to select the appropriate aging temperature and time according to the specific use environment and requirements to obtain the best performance.

[0034] See also Figure 5 The utility model provides a corrosion-resistant high-pressure stop valve stem. The connecting member 3 includes a connecting seat 31 and a positioning block 32. The right end of the connecting seat 31 is fixed to the positioning block 32. The positioning block 32 is embedded in the positioning groove 2. The connecting seat 31 is locked and fixed with the first rod end 1 by bolts.

[0035] In this embodiment, a plurality of sealing rings are sleeved on the outer side of the positioning block 32 to strengthen the sealing connection. The cross section of the connecting seat 31 is "concave" to facilitate docking with the first rod end 1 for a fitting connection. The outer ring diameter of the connecting seat 31 is consistent with the ring diameter of the first rod end 1 to ensure the consistency of the ring diameter of the valve stem except for the threaded rod 4.

[0036] See also Figure 1-Figure 5 During assembly, the positioning block 32 in the connecting member 3 is embedded in the positioning groove 2, and the square positioning groove 2 is used to achieve a stable connection between the connecting member 3 and the first rod end 1 to prevent the connecting member 3 and the first rod end 1 from rotating and loosening. When the positioning block 32 is embedded in the positioning groove 2, the connecting seat 31 wraps the first rod end 1, and then is reinforced with bolts to achieve the connection between the first rod end 1 and the threaded rod 4. According to this step, the threaded rod 4 is firmly connected to the second connecting member 7, and the valve stem can be installed in the high-pressure stop valve for use;

[0037] During the use of the valve stem, because it is made of 17-4 stainless steel throughout, it has high corrosion resistance and high temperature resistance, can operate stably in harsh environments, is suitable for various working conditions, and effectively avoids unstable working conditions caused by the material.

[0038] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0039] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0040] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A corrosion-resistant high-pressure stop valve stem, characterized in that: It comprises a first rod end (1), a positioning groove (2), a connecting piece (3), a threaded rod (4), a second rod end (5), a second positioning groove (6), and a second connecting piece (7); A positioning groove (2) is provided at the right end of the first rod end (1); The left end of the connecting member (3) is embedded in the interior of the positioning groove (2), and is locked and fixed with the first rod end (1) by means of bolts; The left and right ends of the threaded rod (4) are respectively fixed to the connecting piece (3) and the second connecting piece (7); A second positioning groove (6) is formed at the left end of the second rod end (5); The right end of the second connecting member (7) is embedded in the second positioning groove (6), and is locked and fixed to the second rod end (5) by means of bolts.

2. According to claim 1, a corrosion-resistant high-pressure stop valve stem is characterized in that: The connecting member (3) comprises a connecting seat (31) and a positioning block (32); the right end of the connecting seat (31) is fixed to the positioning block (32); the positioning block (32) is embedded in the positioning groove (2); and the connecting seat (31) is locked and fixed to the first rod end (1) by bolts.

3. According to claim 1, a corrosion-resistant high-pressure stop valve stem is characterized in that: The cross sections of the positioning groove (2) and the second positioning groove (6) are both rectangular.

4. According to claim 1, a corrosion-resistant high-pressure stop valve stem is characterized in that: The structure of the connecting member (3) is consistent with the structure of the second connecting member (7).

5. According to claim 2, a corrosion-resistant high-pressure stop valve stem is characterized in that: The outer side of the positioning block (32) is sleeved with multiple sets of sealing rings.

6. The corrosion-resistant high-pressure stop valve stem according to claim 2, characterized in that: The cross section of the connecting seat (31) is concave.

7. The corrosion-resistant high-pressure stop valve stem according to claim 2, characterized in that: The outer diameter of the connecting seat (31) is consistent with the outer diameter of the first rod end (1).

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