Valve body guide rail positioning adjustable supporting tool for PDH reactor special valve
By designing an adjustable support tool for positioning the valve body guide rail for a special valve in a PDH reactor, the problems of poor guide rail parallelism and easy weld cracking were solved, achieving stable welding of the guide rail and valve body and stable movement of the special valve.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN BOHAI PETROCHEM CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-19
AI Technical Summary
In the existing technology, the guide rails of the reactor special valves in PDH devices cannot maintain balance during reinstallation, resulting in insufficient welding strength and post-weld cracks. Improper installation of the guide rails and poor parallelism can easily lead to cracks appearing in the weld in a short period of time.
An adjustable support tool for positioning the valve body guide rail of a special valve in a PDH reactor is provided. By combining a first limiting strip, a second limiting strip, and a locking element, the parallelism of the guide rail body is adjusted to ensure the stability of the weld after the guide rail and valve body are welded.
This effectively prevents cracks from easily appearing in the weld seam after the guide rail and valve body are welded together, ensuring the parallelism and stable movement of the guide rail, and ensuring the stable operation of the special valve.
Smart Images
Figure CN224254579U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chemical equipment technology, and in particular to an adjustable support tool for positioning valve body guide rails for special valves in PDH reactors. Background Technology
[0002] In the chemical industry, a PDH unit is an industrial unit for the dehydrogenation of propane to propylene. Its core function is to use a reactor to convert propane (CH8) into high-value-added propylene (CH6) through a catalytic reaction.
[0003] Reactor-specific valves are special-function valves used in core equipment such as chemical reactors. Their main function is to precisely control the flow, pressure, and isolation of reactants under harsh conditions such as high temperature, high pressure, corrosive media, or high-purity media, ensuring the safety and efficiency of the reaction process. In PDH processes, reactor-specific valves are mainly used in catalyst regeneration systems and product gas compression circulation, and must withstand high temperatures (500–650℃) and hydrogen environments. See also Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of the guide rail 2' inside the valve body in the prior art. In the prior art, the valve plate moves along the guide rail 2'.
[0004] The applicant has discovered at least the following technical problems in the existing technology: the special valve of the PDH unit reactor needs to be disassembled for maintenance and replacement of spare parts after a certain period of operation. When reinstalling the valve body guide rail, the following problems occur: due to the inability to ensure that the guide rail remains balanced during the reinstallation process, the required welding strength cannot be met, resulting in post-weld cracks; improper installation of the guide rail leads to damage to the guide rail and deformation of the guide rail body; during the installation of the guide rail, the parallelism of the guide rail is poor, and the weld between the guide rail and the valve body is prone to cracking in a short period of time. Utility Model Content
[0005] The purpose of this utility model is to provide an adjustable support tool for positioning the valve body guide rail of a special valve in a PDH reactor, so as to solve the technical problems of poor parallelism of the guide rail of the special valve in the reactor and the easy appearance of cracks in the weld after the guide rail and the valve body are welded in a short time. The various technical effects of the preferred technical solution among the many technical solutions provided by this utility model are described in detail below.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] The adjustable support tool for positioning valve body guide rails of special valves in PDH reactors provided by this utility model includes a first limiting bar, a second limiting bar, a locking element, and a limiting element, wherein:
[0008] One end of the locking member is fixedly connected to the first limiting strip, the first limiting strip abuts against one of the guide rail bodies, and the other end of the locking member is a threaded section, which is threadedly connected to the corresponding limiting member.
[0009] The limiting member has a limiting plane. Rotating the limiting member can adjust the position of the limiting plane. After the position of the limiting plane is adjusted, all the limiting planes abut against the second limiting strip. The second limiting strip abuts against another guide rail body, thereby adjusting the distance between corresponding positions of the two guide rail bodies, and thus adjusting the parallelism of the two guide rail bodies.
[0010] Preferably, there are multiple locking elements, and all the locking elements are arranged at intervals along the length direction of the guide rail body.
[0011] Preferably, the number of the limiting members corresponds one-to-one with the number of the locking members.
[0012] Preferably, the spacing between two adjacent locking elements is equal.
[0013] Preferably, the limiting strip is a rectangular block, and the opposite sides of the rectangular block are mutually parallel planes.
[0014] Preferably, the locking member includes a screw body and an end head that are fixedly connected, wherein:
[0015] The end head is welded and fixed to the first limiting strip, and the screw body is threadedly connected to the second limiting member.
[0016] Preferably, the screw body and the end head are integrally formed structures.
[0017] Preferably, the cross-section of the limiting member is a polygonal structure.
[0018] One end of the locking member is fixedly connected to the first limiting strip, the first limiting strip abuts against one of the guide rail bodies, and the other end of the locking member is a threaded section, which is threadedly connected to the corresponding limiting member.
[0019] The limiting member has a limiting plane. Rotating the limiting member can adjust the position of the limiting plane. After the position of the limiting plane is adjusted, all the limiting planes abut against the second limiting strip. The second limiting strip abuts against another guide rail body, thereby adjusting the distance between corresponding positions of the two guide rail bodies, and thus adjusting the parallelism of the two guide rail bodies.
[0020] The adjustable support tool for positioning valve body guide rails of the special valve in a PDH reactor provided by this utility model has the following advantages compared with the prior art: In use, one end of the locking member is first fixed to the first limiting strip, and the first limiting strip abuts against one of the guide rail bodies. The limiting member is rotated to adjust its position on the locking member, thereby adjusting the position of the limiting plane. After the position of the limiting plane is adjusted, all the limiting planes abut against the second limiting strip. The positioned second limiting strip abuts against another guide rail body. The tool, by pre-adjusting the parallelism of the first and second limiting strips, ensures the spacing between corresponding positions of the guide rail bodies, thereby adjusting the parallelism of the two guide rail bodies and preventing the weld seam after the guide rail and valve body are welded from cracking in a short time, thus ensuring the stable movement of the special valve. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of the guide rail inside the reactor in the prior art, where 1' is the valve body and 2' is the track;
[0023] Figure 2 This is a partial structural diagram of the adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor, as described in this utility model, within the reactor.
[0024] Figure 3 This is a schematic diagram of an adjustable support tool for positioning the valve body guide rail for a special valve used in a PDH reactor.
[0025] Figure 4 This is a structural schematic diagram of the limiting component;
[0026] Figure 5 This is a side view of the arrangement of the limiting components on one of the guide rail bodies.
[0027] In the figure: 1. Valve body; 2. Guide rail body; 3. Locking component; 31. Screw body; 32. End head; 4. Limiting component; 41. Limiting plane; 42. Threaded hole; 51. First limiting bar; 52. Second limiting bar. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0029] In the description of this utility model, it should be understood that the terms "center," "length," "width," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0031] This utility model provides an adjustable support tool for positioning the valve body guide rail of a special valve in a PDH reactor. It can ensure the parallelism of the two guide rail bodies, prevent the weld seam after the guide rail and valve body are welded from cracking in a short time, and ensure the stable movement of the special valve.
[0032] The following is combined Figures 2-5 The technical solution provided by this utility model will be described in more detail.
[0033] Example 1:
[0034] See Figures 2-5As shown, the adjustable support tool for positioning the valve body guide rail of the special valve of the PDH reactor provided by this utility model includes a first limiting bar 51, a second limiting bar 52, a locking member 3, and a limiting member 4. One end of the locking member 3 is fixedly connected to the first limiting bar 51, and the first limiting bar 51 abuts against one of the guide rail bodies. The other end of the locking member 3 is a threaded section, which is threadedly connected to the corresponding limiting member 4. The limiting member 4 has a limiting plane 41. Rotating the limiting member 4 can adjust the position of the limiting plane 41. After the position of the limiting plane 41 is adjusted, all limiting planes 41 abut against the second limiting bar 52. The second limiting bar 52 abuts against another guide rail body 2, thereby adjusting the distance between corresponding positions of the two guide rail bodies 2, and thus adjusting the parallelism of the two guide rail bodies 2.
[0035] The valve body guide rail structure of the reactor special valve provided by this utility model is used by first fixing one end of the locking member 3 to the first limiting strip 51. The first limiting strip 51 abuts against one of the guide rail bodies. The limiting member 4 is rotated to adjust the position of the limiting member 4 on the locking member 3, thereby adjusting the position of the limiting plane 41. After the position of the limiting plane 41 is adjusted, all the limiting planes 41 abut against the second limiting strip 52. The positioned second limiting strip 52 is used to abut against another guide rail body 2. The above tool, by pre-adjusting the parallelism of the first limiting strip 51 and the second limiting strip 52, ensures the spacing between corresponding positions of the guide rail bodies 2, thereby adjusting the parallelism of the two guide rail bodies and preventing the weld seam after the guide rail and valve body are welded from cracking in a short time, thus ensuring the stable movement of the special valve.
[0036] See Figure 4 As shown, the limiting member 4 is provided with a threaded hole 42, which is threadedly connected to the threaded section of the corresponding locking member 3, thereby adjusting the position of the limiting plane 41 and adjusting the spacing between the corresponding positions of the first limiting bar 51 and the second limiting bar 52.
[0037] As an optional implementation, see Figure 2 and Figure 3 As shown, there are multiple locking components 3, all of which are arranged at intervals along the length of the guide rail body 2. The spacing between two adjacent locking components 3 is equal.
[0038] The above structure can limit the inclination of the first limiting strip 51 and the second limiting strip 52, that is, adjust the distance between different positions of the first limiting strip 51 and the second limiting strip 52 to make the first limiting strip 51 and the second limiting strip 52 parallel. After the second limiting strip 52 abuts against the corresponding guide rail body 2, it ensures that the two guide rail bodies 2 are parallel.
[0039] The locking component 3 can be implemented by combining the welded end head 32 with the screw body 31, which is used to establish an adjustable connection between the two limiting strips 5. The limiting component 4 refers to a threaded adjustment device with a limiting plane 41, which can be implemented by a hexagonal nut structure with a planar contact surface. The threaded rotation drives the limiting plane 41 to move, thereby achieving precise control of the distance between the first limiting strip 51 and the second limiting strip 52.
[0040] Specifically, see Figure 2 and Figure 3 As shown, all locking components 3 are welded at one end to the first limiting strip 5 to form an initial connection point. The inner side of one guide rail body 2 abuts against the first limiting strip 51. When the limiting component 4 is rotated, its limiting plane 41 moves along the thread axis. Adjust the position of the limiting plane 41. After all the limiting planes 41 are adjusted, the second limiting strip 52 is attached to the limiting plane 41. Measure the parallelism of the first limiting strip 51 and the second limiting strip 52. If the first limiting strip 51 and the second limiting strip 52 are parallel, then attach the other guide rail body 2 to the plane of the second limiting strip 52, and the two guide rail bodies 2 will be parallel. If there is an installation error in the first limiting strip 51 and the second limiting strip 52, continue to adjust the position of the upper limiting plane 41 of the corresponding limiting component 4 until the first limiting strip 51 and the second limiting strip 52 are parallel.
[0041] The gap between the guide rail bodies is adjusted by the adjustable limiting component 4. After spot welding, slide welding is performed. After the guide rail body 2 is welded into the valve body, the offset of the guide rail body 2 after welding is ≤0.1mm. This solves the problems of large offset, guide rail deformation, and guide rail cracks. The tool is removed after the guide rail is welded and fixed. The tool is made of high-strength stainless steel to prevent stress deformation of the guide rail during the welding process. The locking and limiting components are evenly distributed and have a certain degree of flatness and smoothness to avoid damage to the sealing surface of the valve body guide rail.
[0042] The parallelism between the first limiting bar 51 and the second limiting bar 52, and the parallelism between the two guide rail bodies 2, can be measured by existing technologies such as a level or laser measuring instrument.
[0043] As an optional implementation, see Figure 3 As shown, the locking component 3 includes a screw body 31 and an end head 32 that are fixedly connected, wherein: the end head 32 is welded and fixed to the first limiting strip 51, and the screw body 31 is threadedly connected to the limiting component 4. The screw body 31 and the end head 32 are integrally formed structures.
[0044] With the above structure, turning the limiting member 4 makes it easy to adjust the position of the limiting member 4 on the screw body 31, thereby adjusting the position of the limiting plane 41.
[0045] See Figure 4 As shown, the cross-section of the limiting member 4 is a polygonal structure, which makes it easy to tighten using auxiliary tools such as wrenches.
[0046] See Figure 5 As shown, positions a, b, c, d, and e along the length of the second limiting strip 52 abut against the limiting plane 41 of the limiting member 4. By adjusting the positions a, b, c, d, and e of the second limiting strip 52, the distance between it and the first limiting strip 51 can be adjusted, thereby ensuring the parallelism between the first limiting strip 51 and the second limiting strip 52.
[0047] See Figure 2 As shown, the guide rail inside the special valve body of the PDH reactor is kept parallel by the above-mentioned tool to prevent welding deformation in a short time. After the guide rail body is welded and fixed, the tool can be removed without affecting the use.
[0048] The valve body guide rail positioning adjustable support tool (the wording here is incomplete), the guide rail body 2 is fixed on the inner wall of the valve body.
[0049] The specific features, structures, or characteristics described in this specification may be combined in any suitable manner in one or more embodiments or examples.
[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. An adjustable support tool for positioning the valve body guide rail of a special valve in a PDH reactor, characterized in that, Includes a first limit bar, a second limit bar, a locking element, and a limiting element, wherein: One end of the locking member is fixedly connected to the first limiting strip, the first limiting strip abuts against one of the guide rail bodies, and the other end of the locking member is a threaded section, which is threadedly connected to the corresponding limiting member. The limiting member has a limiting plane. Rotating the limiting member can adjust the position of the limiting plane. After the position of the limiting plane is adjusted, all the limiting planes abut against the second limiting strip. The second limiting strip abuts against another guide rail body, thereby adjusting the distance between corresponding positions of the two guide rail bodies, and thus adjusting the parallelism of the two guide rail bodies.
2. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 1, characterized in that, The number of locking components is multiple, and all the locking components are arranged at intervals along the length direction of the guide rail body.
3. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 2, characterized in that, The number of limiting components is set to correspond one-to-one with the number of locking components.
4. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 2, characterized in that, The spacing between two adjacent locking elements is equal.
5. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 1, characterized in that, The limiting strip is a rectangular block, and the opposite sides of the rectangular block are mutually parallel planes.
6. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 1, characterized in that, The locking element includes a screw body and an end head that are fixedly connected, wherein: The end head is welded and fixed to the first limiting strip, and the screw body is threadedly connected to the second limiting member.
7. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 6, characterized in that, The screw body and the end head are integrally formed structures.
8. The adjustable valve body guide rail positioning support tool for a special valve in a PDH reactor according to claim 1, characterized in that, The cross-section of the limiting component is a polygonal structure.