Cleaning pin

Abstract

The utility model relates to the technical field of reaction raw material scraping, in particular to a cleaning pin which comprises a screw provided with a nut part and a stud part which are coaxially arranged, and the nut part is provided with a threaded hole; the protective sleeve is coaxially arranged on the peripheral side of the stud part and arranged at the end, away from the nut part, of the stud part, and the protective sleeve is made of polytetrafluoroethylene. According to the cleaning pin disclosed by the utility model, the screw is in threaded connection and fixed on the inner wall of the reactor through the threaded hole in the nut part, so that the pin is convenient to clean, maintain or replace; meanwhile, the protective sleeve made of polytetrafluoroethylene is arranged on the stud part, so that raw materials of the cleaning pin can be stirred by virtue of the oily property and the corrosion resistance of the protective sleeve on the surface, the raw materials are not easily adhered to the pin, and the cleaning pin and a reactor where the cleaning pin is located can be conveniently and repeatedly used for a long time; the utility model aims to solve the problem that pins on a reactor in the prior art are easy to corrode and wear.

Description

TECHNICAL FIELD

[0001] The utility model relates to reaction raw material scraping technical field, and more specifically, relate to a clean pin. BACKGROUND

[0002] The reactor is the equipment for realizing the reaction process, and is widely used in chemical, oil refining, metallurgy, light industry and other industrial departments. Chemical reaction engineering takes the reaction process in the industrial reactor as the research object, uses the mathematical model method to establish the reactor mathematical model, studies the influence of the reactor transfer process on the chemical reaction and the dynamic characteristics and the reactor parameter sensitivity of the reactor, so as to realize the reliable design and operation control of the industrial reactor.

[0003] The reaction raw material usually carries out spiral conveying, stirring uniformity of lifting raw material in the pre-reactor between entering the reactor, to ensure the reaction quality. In some reactors, there is the phenomenon that the reaction raw material adheres to the spiral blade, and the current solution to this phenomenon is to fix a plurality of pins on the side wall of the reactor for scraping.

[0004] The pin is usually made of stainless steel material, and under the action of the reaction environment for a long time, the pin will appear the phenomenon of corrosion, and because the pin usually needs to be in hard contact with the spiral blade, the pin also has the phenomenon of easy wear. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a clean pin, which aims to solve the problems of easy corrosion and easy wear of the pin on the reactor in the prior art.

[0006] In order to solve the above technical problems, a clean pin is provided, comprising: a screw provided with a screw cap part and a screw column part arranged coaxially, the screw cap part is provided with a threaded hole;

[0007] A protective sleeve is coaxially arranged on the side of the screw column part and arranged on the end of the screw column part away from the screw cap part, and the protective sleeve is made of polytetrafluoroethylene.

[0008] In any of the above technical solutions, further, the threaded hole is coaxially arranged with the screw cap part, the depth of the threaded hole is greater than the length of the screw cap part, and the depth of the threaded hole is less than the sum of the length of the screw cap part and the length of the screw column part.

[0009] In any of the above technical solutions, further, it further comprises:

[0010] A sealing element is arranged on the protective sleeve.

[0011] In any of the above technical solutions, further, the protective sleeve is provided with an annular groove, and the sealing element is arranged at the annular groove.

[0012] In any of the above technical solutions, further, the sealing member is made of polytetrafluoroethylene containing graphite particles.

[0013] In any of the above technical solutions, further, the screw cap part is provided with a first section and a second section, the first section is arranged on the side of the second section away from the stud part, the diameter of the first section is larger than that of the second section, and the diameter of the second section is equal to that of the protective sleeve.

[0014] In any of the above technical solutions, further, the side of the first section away from the second section is provided with a spherical surface.

[0015] In any of the above technical solutions, further, the wall thickness of the protective sleeve is 0.25 to 0.4 times the diameter of the stud part.

[0016] In any of the above technical solutions, further, the wall thickness of the protective sleeve is 8 to 15 mm.

[0017] In any of the above technical solutions, further, the diameter of the protective sleeve is 40 to 70 mm.

[0018] The beneficial effects are that:

[0019] 1. The cleaning pin is fixed on the inner wall of the reactor through the threaded hole on the screw cap part, which is convenient for cleaning, maintenance or replacement of the pin; meanwhile, the protective sleeve made of polytetrafluoroethylene is arranged on the stud part, which can make the cleaning pin stir the raw materials by the oily property and corrosion resistance of the surface protective sleeve, and the raw materials are not easy to adhere to the pin, so that the cleaning pin and the reactor where it is located can be used for a long time and repeatedly.

[0020] 2. The cleaning pin can replace the pin made of hastelloy in the prior art, and reduce the cost to about one fifth of the cost of the pin made of hastelloy under the premise of meeting the requirements of corrosion resistance and service life. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Fig. 1 is a schematic diagram of the three-dimensional structure of the cleaning pin of the first embodiment of the present utility model;

[0023] Fig. 2 is a schematic diagram of a perspective structure of a cleaning pin according to a second embodiment of the present application;

[0024] The reference signs are explained as follows:

[0025] 1, screw; 101, nut part; 102, stud part; 103, first section; 104, second section;

[0026] 2, protective sleeve;

[0027] 3, sealing member. DETAILED DESCRIPTION

[0028] Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. It should be understood that the present application is not limited to the example embodiments described herein. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0029] It should be noted that, as shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", "an", and / or "the" do not specifically refer to the singular, but also include the plural. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0030] If the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0031] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixing", etc. should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] The following embodiments will provide a detailed description of a cleaning pin of this application.

[0034] In this embodiment, as Figs. 1-2 As shown, the cleaning pin, applied to a corrosion-resistant reactor, includes: a screw 1, having a nut portion 101 and a stud portion 102 coaxially arranged, the nut portion 101 having a threaded hole;

[0035] The protective sleeve 2 is coaxially disposed around the stud portion 102 and at the end of the stud portion 102 away from the nut portion 101. The protective sleeve 2 is made of polytetrafluoroethylene.

[0036] In this technical solution, taking the vertical placement of screw 1 as an example, the nut portion 101 is on top and the stud portion 102 is on the bottom, with the nut portion 101 and the stud portion 102 coaxially arranged. The top surface of the nut portion 101 has a vertically downward threaded hole, coaxially arranged with the nut portion 101, which penetrates the nut portion 101 downwards but does not penetrate the stud portion 102. The protective sleeve 2 is pre-formed and then sintered at high temperature on the periphery and bottom of the stud portion 102, or the protective sleeve 2 is die-cast on the periphery and bottom of the stud portion 102 using a mold. After the pin is fixed into the reactor, the protective sleeve 2 on the outside of the screw 1 contacts the spiral blade and the reaction material, which can reduce the wear on the pin. At the same time, the properties of polytetrafluoroethylene can be used to reduce the impact of corrosion and reduce the possibility of reaction material adhering to the pin.

[0037] In this embodiment, the threaded hole and the nut portion 101 are coaxially arranged. The depth of the threaded hole is greater than the length of the nut portion 101, and the depth of the threaded hole is less than the sum of the lengths of the nut portion 101 and the stud portion 102.

[0038] In the technical solution, the threaded hole is coaxially arranged with the screw cap 101, facilitating the fixation of the screw 1 in the reactor. Meanwhile, the depth of the threaded hole is limited by the length of the screw cap 101 and the length of the screw post 102, which can improve the fixation stability of the screw 1 and the reactor.

[0039] In the embodiment, the following are further included:

[0040] The sealing member 3 is arranged on the protective sleeve 2.

[0041] In the technical solution, the screw 1 is made of stainless steel material. When the screw 1 is arranged on the reactor, there is a problem of poor sealing between the two. The sealing member 3 is arranged on the protective sleeve 2 to ensure the sealing effect of the clean pin and the reactor.

[0042] In the embodiment, the protective sleeve 2 is provided with an annular groove, and the sealing member 3 is arranged in the annular groove.

[0043] In the technical solution, the annular groove is arranged on the protective sleeve 2, facilitating the sealing between the sealing member 3 and the protective sleeve 2.

[0044] In some technical solutions, the annular groove is arranged as two, and the sealing member 3 is also arranged as two.

[0045] In the embodiment, the sealing member 3 is made of polytetrafluoroethylene containing graphite particles.

[0046] In the technical solution, polytetrafluoroethylene is also called white four fluorine, and polytetrafluoroethylene containing graphite particles is also called black four fluorine. This arrangement can well play the sealing effect of black four fluorine and the self-lubricating and anti-adhesion properties of white four fluorine.

[0047] In the embodiment, the screw cap 101 is provided with a first section 103 and a second section 104. The first section 103 is arranged on the side of the second section 104 away from the screw post 102. The diameter of the first section 103 is larger than that of the second section 104, and the diameter of the second section 104 is equal to that of the protective sleeve 2.

[0048] In the technical solution, the first section 103 is arranged above the second section 104, and the second section 104 is arranged between the first section 103 and the screw post 102. The diameter of the first section 103 is the largest, the diameter of the second section 104 is the second largest, and the diameter of the screw post 102 is the smallest. This arrangement of the first section 103 and the second section 104 facilitates the sintering or pressure casting of the protective sleeve 2 on the screw post 102.

[0049] In some specific embodiments, the total length of the screw 1 is 158 mm, the length of the first section 103 is 5 mm, the length of the second section 104 is 12 mm, and the depth of the threaded hole is 35 mm.

[0050] In some embodiments, the surface roughness Ra of the threaded portion 102 is 6.4 μm.

[0051] In this embodiment, the first section 103 is provided with a spherical surface on the side away from the second section 104.

[0052] In this embodiment, the radius of the spherical surface is 80-90 mm, specifically 84 mm.

[0053] In this embodiment, the wall thickness of the protective sleeve 2 is 0.25-0.4 times the diameter of the threaded portion 102.

[0054] In this embodiment, the wall thickness of the protective sleeve 2 is 0.35 times the diameter of the threaded portion 102.

[0055] In this embodiment, the wall thickness of the protective sleeve 2 is 8-15 mm.

[0056] In this embodiment, the diameter of the threaded portion 102 is 30 mm, and the wall thickness of the protective sleeve 2 is 10.5 mm.

[0057] In this embodiment, the diameter of the protective sleeve 2 is 40-70 mm.

[0058] In this embodiment, the diameter of the protective sleeve 2 is 51 mm.

[0059] The above has described various embodiments of the present disclosure, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical application, or improvement of technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A cleaning pin for use on a corrosion resistant reactor, characterized by, The screw (1) is provided with a screw cap portion (101) and a stud portion (102) coaxially arranged, the screw cap portion (101) is provided with a threaded hole; The protective sleeve (2) is coaxially arranged on the side of the stud portion (102) and the end of the stud portion (102) away from the screw cap portion (101), and the protective sleeve (2) is made of polytetrafluoroethylene. The threaded hole is coaxially arranged with the screw cap portion (101), the depth of the threaded hole is greater than the length of the screw cap portion (101), and the depth of the threaded hole is less than the sum of the length of the screw cap portion (101) and the length of the stud portion (102).

2. The cleaning pin of claim 1, wherein, Further comprising:

3. The cleaning pin of claim 1, wherein, The sealing element (3) is arranged on the protective sleeve (2). The protective sleeve (2) is provided with an annular groove, and the sealing element (3) is arranged at the annular groove.

4. The cleaning pin of claim 3, wherein, The sealing element (3) is made of polytetrafluoroethylene containing graphite particles.

5. The cleaning pin of claim 3, wherein, The screw cap portion (101) is provided with a first segment portion (103) and a second segment portion (104), the first segment portion (103) is arranged on the side of the second segment portion (104) away from the stud portion (102), the diameter of the first segment portion (103) is greater than the diameter of the second segment portion (104), and the diameter of the second segment portion (104) is equal to the diameter of the protective sleeve (2).

6. The cleaning pin of claim 1, wherein, The side of the first segment portion (103) away from the second segment portion (104) is provided with a spherical surface.

7. The cleaning pin of claim 6, wherein, The wall thickness of the protective sleeve (2) is 0.25 to 0.4 times the diameter of the stud portion (102).

8. The cleaning pin of claim 1, wherein, The wall thickness of the protective sleeve (2) is 8 to 15 mm.

9. The cleaning pin of claim 1, wherein, The diameter of the protective sleeve (2) is 40 to 70 mm.

10. The cleaning pin of claim 1, wherein, ​

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