Optimization device suitable for PDH device special valve sealing gas system

Abstract

The utility model provides an optimizing device suitable for a PDH device special valve sealing gas system, and relates to the technical field of petrochemical equipment, the optimizing device comprises a collision control block, the collision control block is of a cylindrical structure, the first end of the collision control block is provided with a threaded groove used for being in threaded fit with a switch valve rod of an angle valve, and the second end of the collision control block is provided with a second threaded groove. A containing groove is formed in the second end of the collision control block, a rotating piece is rotationally arranged in the containing groove, and part of the rotating piece is exposed out of the second end of the collision control block. The first end of the collision control block is in threaded fit with the switch valve rod through the threaded groove, so that connection between the collision control block and the angle valve is more stable and reliable. The second end of the collision control block is rotationally provided with the rotating part, the rotating part is in collision contact with the collision block, the direct contact area with the collision block can be effectively reduced, stress generated by collision is reduced, the stress generated by collision can be released through rotation of the rotating part, and the service life of the collision control block is further prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical equipment, in particular to an optimization device suitable for a special valve sealing gas system of a PDH device. Background Art

[0002] Special valves are important control equipment for the reactors of the reaction units of the PDH unit. Each special valve is driven by a hydraulic valve to control the process flow of each reactor. The central cycle timing device is used to start the movement of these valves. The valve actuator is interlocked with the valve position and the reactor pressure check to avoid the mixing of air and hydrocarbons.

[0003] The hydraulic transmission valve is specially designed to keep maintenance requirements low in high-frequency operation. When the main valve is in the closed state, its sealing angle valve automatically opens to allow the inert gas to seal to the valve cover for sealing. In this way, if there is a leak between the valve plate and the valve seat, the inert sealing gas avoids mixing of process streams. In the event of failure of the inert (preferably nitrogen) sealing gas, low-pressure steam will be automatically introduced to maintain positive pressure isolation.

[0004] The applicant has found that the prior art has at least the following technical problems:

[0005] like Figure 3 As shown, at present, the existing collision control block 6 of the sealed nitrogen switch angle valve on the special valve is a cylindrical structure, and is threadedly connected to the switch valve stem 5 of the angle valve through welding bolts. It will collide with the collision block 4 during each switching process. The contact area between the existing collision control block 6 and the collision block 4 is large, and the stress generated by the collision is difficult to release well. Continuous and frequent collisions will cause the existing collision control block 6 to be damaged and have a short service life, so that the angle valve cannot be opened normally and the sealing gas cannot enter the special valve cavity, affecting the safe operation of the entire reactor.

[0006] In view of this, the present utility model is proposed. Utility Model Content

[0007] The purpose of the utility model is to provide an optimization device suitable for the special valve sealing gas system of the PDH device, so as to solve the technical problems that the collision control block design of the angle valve in the prior art has defects, the contact area between the collision control block and the collision block is large, the stress generated by the collision is difficult to release well, and continuous and frequent collisions will cause damage to the collision control block, shorten the service life, and affect the safe operation of the entire reactor. The many technical effects that can be produced by the preferred technical solution among the many technical solutions provided by the utility model are described in detail below.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] The utility model provides an optimization device suitable for a special valve sealing gas system of a PDH device, comprising a collision control block, the collision control block being a cylindrical structure, a first end of the collision control block being provided with a threaded groove for threaded cooperation with a switch valve stem of an angle valve, a second end of the collision control block being provided with a receiving groove, a rotating part being rotatably arranged in the receiving groove, and a part of the rotating part being exposed outside the second end of the collision control block.

[0010] Preferably, the accommodating groove is located in the middle of the second end of the collision control block, the accommodating groove is arranged to penetrate the collision control block in a radial direction, and the accommodating groove extends in an axial direction of the collision control block.

[0011] Preferably, a rotating shaft is arranged in the accommodating groove, the rotating member is rotatably sleeved on the rotating shaft, and the central axis of the rotating shaft is arranged perpendicular to the central axis of the collision control block.

[0012] Preferably, the rotating member is in a roller-shaped structure with smooth transitions at the corners.

[0013] Preferably, the width of the rotating member is 1 / 3 of the diameter of the collision control block.

[0014] Preferably, a positioning groove is arranged on the outer peripheral wall of the first end of the collision control block, and the number of the positioning grooves is two and they are symmetrically arranged.

[0015] Preferably, the corners of the collision control block are smoothly transitioned.

[0016] The preferred technical solution of the utility model can also produce at least the following technical effects:

[0017] The utility model effectively avoids the defects in the design of the collision control block of the angle valve existing in the prior art, the contact area between the collision control block and the collision block is large, the stress generated by the collision is difficult to be well released, and the continuous and frequent collisions will cause the collision control block to be damaged, the service life is short, and the technical problems of affecting the safe operation of the entire reactor. The utility model provides an optimization device suitable for the special valve sealing gas system of the PDH device, including a collision control block, the collision control block is a cylindrical structure, the first end of the collision control block is provided with a thread groove, which is used to cooperate with the switch valve stem thread of the angle valve, and the second end of the collision control block is provided with a receiving groove, and a rotating part is rotatably arranged in the receiving groove, and part of the rotating part is exposed outside the second end of the collision control block. The utility model makes the connection between the collision control block and the angle valve more stable and reliable by cooperating with the switch valve stem thread through the thread groove at the first end of the collision control block. The second end of the collision control block is rotatably provided with a rotating part, and the rotating part is contacted with the collision block by the collision of the rotating part, which can effectively reduce the direct contact area with the collision block and reduce the stress generated by the collision, and the stress generated by the collision can be released by the rotation of the rotating part, further extending the service life of the collision control block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural schematic diagram of an optimization device for a special valve sealing gas system of a PDH device provided by the utility model;

[0020] Figure 2 yes Figure 1 A top view of

[0021] Figure 3 It is a structural diagram of an existing collision control block.

[0022] In the figure:

[0023] 1. Collision control block; 11. Thread groove; 12. Accommodation groove; 13. Installation groove; 14. Positioning groove;

[0024] 2. Rotating parts; 3. Rotating shaft;

[0025] 4. Collision block; 5. Switch valve stem; 6. Existing collision control block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0027] like Figure 1 , 2 As shown, the utility model provides an optimization device suitable for a special valve sealing gas system of a PDH device, including a collision control block 1. The collision control block 1 is a cylindrical structure. A thread groove 11 is provided at the first end of the collision control block 1 for threaded cooperation with a switch valve stem of an angle valve. A receiving groove 12 is provided at the second end of the collision control block 1. A rotating part 2 is rotatably arranged in the receiving groove 12, and a part of the rotating part 2 is exposed outside the second end of the collision control block 1.

[0028] The first end of the collision control block 1 is threadedly matched with the switch valve stem through the thread groove 11, so that the connection between the collision control block 1 and the angle valve is more stable and reliable. The second end of the collision control block 1 is rotatably provided with a rotating member 2, and the rotating member 2 is in contact with the collision block, which can effectively reduce the direct contact area with the collision block and reduce the stress generated by the collision. Moreover, the stress generated by the collision can be released by the rotation of the rotating member 2, further extending the service life of the collision control block 1.

[0029] As an optional implementation, the accommodating groove 12 is located in the middle of the second end of the collision control block 1 , the accommodating groove 12 is radially penetrated through the collision control block 1 , and the accommodating groove 12 extends axially along the collision control block 1 .

[0030] The receiving groove 12 is located in the middle of the second end of the collision control block 1, that is, the rotating member 2 is rotatably arranged in the middle of the collision control block 1, and can be evenly stressed when impacted, so that the rotation of the rotating member 2 is more stable and reliable.

[0031] As an optional implementation, a rotating shaft 3 is disposed in the accommodating groove 12 , the rotating member 2 is rotatably sleeved on the rotating shaft 3 , and the central axis of the rotating shaft 3 is perpendicularly disposed to the central axis of the collision control block 1 .

[0032] Furthermore, a mounting groove 13 for mounting the rotating shaft 3 is provided on the collision control block 1 , and the mounting groove 13 is communicated with the receiving groove 12 , so that the rotating shaft 3 can be mounted on the collision control block 1 more stably.

[0033] When the rotating part 2 contacts and collides with the impact block, the impact force will cause the rotating part 2 to rotate with the central axis of the shaft 3 as the rotation axis 3, effectively reducing the direct contact area between the rotating part 2 and the impact block, reducing the stress generated by the impact, and releasing the stress through the rotation of the rotating part 2.

[0034] As an optional implementation, the rotating member 2 is in a roller-shaped structure with smooth transitions at the corners.

[0035] The rotating member 2 releases stress by rotating, so as to extend the service life of the collision control block 1. Meanwhile, the corners of the rotating member 2 are smoothly transitioned, so as to reduce the friction between the rotating member 2 and the collision block.

[0036] As an optional implementation, the width of the rotating member 2 is 1 / 3 of the diameter of the collision control block 1, so as to reduce the contact area between the rotating member 2 and the collision block while ensuring that the rotating member 2 has sufficient supporting surface to withstand the impact force.

[0037] As an optional implementation, a positioning groove 14 is provided on the outer peripheral wall of the first end of the collision control block 1 , and the number of the positioning grooves 14 is two and they are symmetrically arranged.

[0038] The function of the positioning groove 14 is that during the assembly process of the collision control block 1 and the switch valve stem of the angle valve, the positioning groove 14 can be clamped by an auxiliary tool to easily drive the collision control block 1 to rotate so that it is threadedly connected to the switch valve stem of the angle valve, and the assembly and disassembly operations are convenient.

[0039] As an optional implementation, the corners of the collision control block 1 are smoothly transitioned.

[0040] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0041] In the description of the present utility model, it should be noted that, unless otherwise specified, "multiple" means two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model 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 utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "an example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An optimization device for a special valve sealing gas system of a PDH device, characterized in that: It includes a collision control block, which is a cylindrical structure. A threaded groove is provided at the first end of the collision control block for threaded cooperation with the switch valve stem of the angle valve. A receiving groove is provided at the second end of the collision control block. A rotating part is rotatably arranged in the receiving groove, and part of the rotating part is exposed outside the second end of the collision control block.

2. The optimization device for the special valve sealing gas system of a PDH device according to claim 1, characterized in that: The accommodating groove is located in the middle of the second end of the collision control block, the accommodating groove is arranged to penetrate the collision control block in a radial direction, and the accommodating groove extends in an axial direction of the collision control block.

3. The optimization device for the special valve sealing gas system of the PDH device according to claim 2, characterized in that: A rotating shaft is arranged in the receiving groove, the rotating member is rotatably sleeved on the rotating shaft, and the central axis of the rotating shaft is arranged perpendicular to the central axis of the collision control block.

4. The optimization device for the special valve sealing gas system of the PDH device according to claim 3, characterized in that: The rotating member is in a roller-shaped structure, and has smooth transitions at the corners.

5. The optimization device for the special valve sealing gas system of the PDH device according to claim 4, characterized in that: The width of the rotating member is 1 / 3 of the diameter of the collision control block.

6. The optimization device for the special valve sealing gas system of a PDH device according to claim 1, characterized in that: A positioning groove is arranged on the outer peripheral wall of the first end of the collision control block, and the number of the positioning grooves is two and they are symmetrically arranged.

7. The optimization device for the special valve sealing gas system of a PDH device according to claim 1, characterized in that: The corners of the collision control block are smoothly transitioned.

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