HD type rotary joint structure convenient to repair
By introducing access holes and tightening screws into the HD rotary joint, the repair process is simplified, the problem of difficult repair of existing rotary joints is solved, the repair efficiency is improved, and the procurement cost is reduced, and the effect of easy maintenance and use is achieved.
Patent Information
- Application Number
- CN202420131782.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-19
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-01-19
AI Technical Summary
After use, the existing HD rotary joints need to be replaced due to the bearing clamping resistance, which is difficult and time-consuming to repair, resulting in the rotary joints becoming disposable spare parts, increasing the procurement cost.
A HD rotary joint structure is designed for easy repair. By setting up a maintenance hole and a tension screw in the cooling water input housing, the compression length of the top compression spring is adjusted by using the tension screw to facilitate the repair of the machine seal assembly, simplifying the repair. process.
It improves repair efficiency, reduces the procurement cost of accessories, and realizes the maintenance and use value of rotary joints.
Smart Images
Figure CN222142328U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotating roller pipeline joint equipment requiring cooling water cooling, in particular to an HD type rotating joint structure which is easy to repair. Background Art
[0002] In the production workshop of coated and plated plates, the water inlet and outlet ends of the water-cooled bottom rollers of the horizontal reduction annealing furnace of the hot-dip aluminum-zinc unit use HD type rotary joints. Currently, this type of rotary joint will be offline after 6-8 months of use due to bearing jamming, and the bearing needs to be replaced before it can continue to be used.
[0003] The original rotary joint needs to be evenly stressed so that it can be installed in place because the spring and the static ring seal of the mechanical seal need to be stressed at the same time. However, this operation is difficult to control during the actual repair and installation, resulting in manual repair being difficult, time-consuming, and labor-intensive, with extremely low repair efficiency. As a result, the offline rotary joint becomes a disposable spare part, greatly increasing procurement costs. Utility Model Content
[0004] The purpose of the utility model is to provide a HD type rotary joint structure that is easy to repair in view of the above situation. The rotary joint structure is an improvement measure made on the basis of the existing structure, which is more convenient for later maintenance and repair.
[0005] The specific scheme of the utility model is: an HD type rotary joint structure that is easy to repair, comprising an axial end connection shell and a cooling water input shell, the two are connected as one and are internally connected, a rotating bearing is installed in the axial end connection shell, a mechanical seal assembly consisting of a flat gasket, an O-ring, a static ring and a dynamic ring is arranged at the connection point between the axial end connection shell and the cooling water input shell, a top pressure spring is installed in the cooling water input shell, the top pressure spring is arranged horizontally and one end thereof is pressed against the end surface of the flat gasket, an inspection hole is also arranged on the cooling water input shell, the inspection hole is coaxially arranged with the center of the flat gasket and the top pressure spring, a first internal thread is arranged on the inner wall of the inspection hole, a plug is connected to the first internal thread; a second internal thread is arranged on the inner hole wall of the flat gasket, the diameters of the first internal thread and the second internal thread are kept the same, and the rotation directions of the first internal thread and the second internal thread are opposite; a tightening screw for maintenance is also arranged corresponding to the first internal thread and the second internal thread.
[0006] Furthermore, the plug described in the utility model is made of hexagonal bolts.
[0007] Furthermore, the tightening screw described in the utility model is a hollow cylindrical screw, and a flat surface is cut and provided on each of the front and rear side walls of the outer wall of the tightening screw; the outer thread diameter of the tightening screw is kept the same as the diameter of the first inner thread and the second inner thread.
[0008] Furthermore, a water supply channel is provided in the cooling water input housing in the utility model, and the water supply channel passes through the flat washer, the O-ring, the static ring and the dynamic ring in sequence from the top pressure spring into the water hole in the shaft.
[0009] Furthermore, the thickness of the flat pad in the utility model is 6 to 8 mm.
[0010] The utility model partially improves the original rotary joint structure, and while meeting the corresponding cooling water supply, provides great convenience for subsequent maintenance and repair work, greatly improves the repair efficiency, and also saves the relevant accessories procurement cost, and has good practical use and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the main cross-sectional structure of the utility model;
[0012] Figure 2 It is a schematic diagram of the structure of the utility model in a side view direction;
[0013] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at K in the middle;
[0014] Figure 4 It is a schematic diagram of the main cross-sectional structure of the tensioning screw in the utility model;
[0015] Figure 5 It is a schematic diagram of the structure of the tensioning screw in the utility model when viewed from the side.
[0016] In the figure: 1—roller shaft, 2—shaft end connecting housing, 3—rotating bearing, 4—moving ring, 5—stationary ring, 6—pressure spring, 7—cooling water input housing, 8—first internal thread, 9—plug, 10—water supply channel, 11—O-ring, 12—flat gasket, 13—second internal thread, 14—plane, 15—inspection hole. DETAILED DESCRIPTION
[0017] The following will be combined with the accompanying drawings of the utility model to clearly and completely describe the technical solution of the utility model. It is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the utility model. In the description of the utility model, it should be noted that the terms "upper", "lower", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model or simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.
[0018] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] See also Figure 1 to Figure 5The utility model is an HD type rotary joint structure that is easy to repair, and has a shaft end connection shell 2 and a cooling water input shell 7, which are connected as a whole and are internally connected. A rotating bearing 3 is installed in the shaft end connection shell, and a mechanical seal assembly consisting of a flat gasket 12, an O-ring 11, a static ring 5 and a dynamic ring 4 is arranged at the connection and communication between the shaft end connection shell and the cooling water input shell. Further, a water supply channel 10 is arranged in the cooling water input shell of the utility model, and the water supply channel passes through the flat gasket, the O-ring, the static ring and the dynamic ring in sequence from the top pressure spring into the water hole in the shaft. A top pressure spring 6 is installed in the cooling water input shell, and the top pressure spring is arranged horizontally and one end thereof is pressed against the end surface of the flat gasket. Further, the thickness of the flat gasket in the utility model is 6 ~8mm, an inspection hole 15 is also provided on the cooling water input housing, the inspection hole is coaxially arranged with the center of the flat gasket and the top pressure spring, a first internal thread 8 is provided on the inner wall of the inspection hole, and a plug 9 is connected to the first internal thread; a second internal thread 13 is provided on the inner hole wall of the flat gasket, the diameter of the first internal thread and the second internal thread remain the same, and the first internal thread and the second internal thread have opposite rotation directions; a tightening screw for maintenance is also provided corresponding to the first internal thread and the second internal thread; further, the tightening screw described in the utility model is a hollow cylindrical screw, and a plane 14 is cut and provided on the front and rear side walls of the outer wall of the tightening screw; the outer thread diameter of the tightening screw remains the same as the diameter of the first internal thread and the second internal thread. Further, the plug described in the utility model is made of hexagonal bolts.
[0020] As an improved rotary joint structure, the utility model opens an inspection hole on the back of a cooling water input shell during design and manufacture and blocks it with a plug. The inner wall of the inspection hole is designed with a first internal thread, and the plug can be screwed on during normal water supply. When it is necessary to inspect, replace or repair related parts inside the joint or the end of the roller shaft, the plug is screwed off and the repair operation is performed using the equipped tightening screw.
[0021] During repair, insert the tensioning screw from the inspection hole at the plug and screw it into the thread in the center of the flat gasket through the top pressure spring, that is, screw it on with the second internal thread. The rotation direction of the first internal thread and the second internal thread is opposite, so that the distance between the flat gasket and the inspection hole is shortened. The tensioning screw can be adjusted to compress the top pressure spring to a certain length, and then the machine seal static ring and O-ring are inserted, and then the bearing and the machine seal dynamic ring assembly retaining ring are installed, and the tensioning screw is removed. The top pressure spring naturally recovers and presses on the end face of the flat gasket, and the plug is installed to easily complete the repair.
[0022] In the utility model, the thickness of the flat washer is thicker than that of the transmission flat washer, so that tapping operation can be performed on it; the top pressure spring is arranged horizontally in the cooling water input shell, the water supply channel passes through the top pressure spring from bottom to top to supply water upward, and the center of the inspection hole is coaxially arranged with the top pressure spring.
[0023] The utility model partially improves the original rotary joint structure, and while meeting the corresponding cooling water supply, provides great convenience for subsequent maintenance and repair work, greatly improves the repair efficiency, and also saves the relevant accessories procurement cost, and has good practical use and promotion value.
Claims
1. An HD type rotary joint structure that is easy to repair, comprising a shaft end connection housing and a cooling water input housing, which are connected as one body and are internally connected, a rotating bearing is installed in the shaft end connection housing, a mechanical seal assembly consisting of a flat gasket, an O-ring, a static ring and a dynamic ring is arranged at the connection point between the shaft end connection housing and the cooling water input housing, a top pressure spring is installed in the cooling water input housing, the top pressure spring is arranged horizontally and one end thereof is pressed against the end surface of the flat gasket, and is characterized in that: An inspection hole is also provided on the cooling water input shell, and the inspection hole is coaxially arranged with the center of the flat gasket and the top pressure spring. A first internal thread is provided on the inner wall of the inspection hole, and a plug is connected to the first internal thread; a second internal thread is provided on the inner hole wall of the flat gasket, the diameters of the first internal thread and the second internal thread remain the same, and the rotation directions of the first internal thread and the second internal thread are opposite; a tightening screw for inspection is also provided corresponding to the first internal thread and the second internal thread.
2. The HD type rotary joint structure that is easy to repair according to claim 1 is characterized in that: The plug is made of hexagonal bolts.
3. The HD type rotary joint structure that is easy to repair according to claim 1 is characterized in that: The tightening screw is a hollow cylindrical screw, and a flat surface is cut on each of the front and rear side walls of the outer wall of the tightening screw; the diameter of the outer thread of the tightening screw is the same as the diameter of the first inner thread and the second inner thread.
4. The HD type rotary joint structure that is easy to repair according to claim 1 is characterized in that: The cooling water input housing is provided with a water supply channel, which enters the water through hole in the shaft from the top pressure spring through the flat washer, the O-ring, the static ring and the dynamic ring in sequence.
5. The HD type rotary joint structure that is easy to repair according to claim 1 is characterized in that: The thickness of the flat pad is 6-8 mm.