Guide rail structure of piston type flow regulating valve

Abstract

The guide rail structure of the piston type flow regulating valve comprises a valve body and a piston, a valve body guide rail is assembled at the bottom end inside the valve body, grooves are formed in the positions, located at the two ends of the valve body guide rail, of the bottom end of the valve body, copper bars are assembled in the grooves, and the piston is arranged at the upper ends of the copper bars. Counterbores are evenly formed in the upper end of the copper bar at equal intervals, threaded holes are evenly formed in the bottom end of the groove at equal intervals, the threaded holes and the counterbores are in one-to-one correspondence in position, anti-disengaging screw cylinders are fixedly assembled at the bottom ends of the interiors of the threaded holes, hexagonal screws are assembled in the counterbores and the threaded holes, and anti-disengaging screw grooves are formed in the bottom ends of the hexagonal screws. An anti-falling rod is vertically mounted in the anti-falling screw cylinder, and the anti-falling rod is in threaded connection with the interior of the anti-falling screw groove; according to the guide rail structure of the piston type flow regulating valve, the valve body guide rail and the copper bar are low in machining cost and simple in process; the valve has the advantages of good wear resistance and corrosion resistance, small friction coefficient and long service life, the copper bar can be replaced after being worn under the special high-frequency working condition, and the later maintenance of the valve is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of flow regulating valve assemblies, and specifically relates to a guide rail structure of a piston type flow regulating valve. Background Technique

[0002] Due to its high regulation accuracy, small cavitation, noise and vibration, good energy dissipation effect, ideal flow - opening curve, and convenience for realizing automatic control, the flow regulating valve has been widely used in many large - scale water conveyance projects. The main functions of the flow regulating valve are manifested in three aspects: energy dissipation, flow regulation, and emergency disposal. First, the energy dissipation function. During operation, the water flow passes through the flow regulating valve and collides and dissipates energy at the outlet, and the kinetic energy of the water body is basically reduced to zero, so that the flow pattern of the water body in the downstream pipeline becomes more stable and the operation is safer;

[0003] However, there are still some deficiencies in the piston type flow regulating valve in the prior art. For example, in the actual application process, the surfacing structure has high requirements for welding technology. There are easily welding defects such as pores, slag inclusions and cracks on the piston guiding contact surface. After surfacing, the hardness of the welding surface is high, the machining is difficult, and the lack of required surface finish will lead to an increase in the friction force of the guide rail, easily wear the piston, and cause the subsequent valve to be easily stuck. Therefore, it is necessary to improve the prior art. Content of the Utility Model

[0004] The purpose of the utility model is to provide a guide rail structure of a piston type flow regulating valve to solve the problems of easily existing welding defects such as pores, slag inclusions and cracks on the piston guiding contact surface, high hardness of the welding surface after surfacing, difficult machining, and the lack of required surface finish leading to an increase in the friction force of the guide rail, easily wearing the piston, and causing the subsequent valve to be easily stuck as mentioned in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A guide rail structure of a piston type flow regulating valve, including a valve body and a piston. The inner bottom end of the valve body is equipped with a valve body guide rail. Grooves are opened at both ends of the valve body guide rail at the bottom end of the valve body. Copper bars are assembled in the grooves. The piston is arranged above the copper bars. Countersunk holes are evenly and equidistantly opened at the upper end of the copper bars. Threaded holes are evenly and equidistantly opened at the bottom end of the grooves. The positions of the threaded holes and the countersunk holes correspond one by one. An anti - detachment screw barrel is fixedly assembled at the inner bottom end of the threaded hole. A hexagonal screw is assembled in the countersunk hole and the threaded hole. An anti - detachment screw groove is opened at the bottom end of the hexagonal screw. An anti - detachment rod is vertically installed inside the anti - detachment screw barrel, and the anti - detachment rod is screwed in the anti - detachment screw groove.

[0006] Preferably, three limit columns are installed on the outer wall of the anti - detachment screw barrel, and the three limit columns are distributed in a triangular shape; a spiral groove matching with the hexagonal screw is opened on the inner wall of each limit column.

[0007] Preferably, an external thread that matches the internal thread of the anti-loosening screw groove is provided on the outer wall of the anti-loosening rod, and the thread helix direction is opposite to that of the hexagonal screw.

[0008] Preferably, a fixing ring is fixedly installed at the upper end of the external part of the hexagonal screw, and an annular pressing piece, a spring and an annular rubber piece are sleeved on the circumferential surface of the hexagonal screw.

[0009] Preferably, the annular pressing piece is located above the fixing ring, the spring is located above the annular pressing piece, the annular rubber piece is located below the fixing ring, and an extrusion block is fixedly installed at the lower end edge of the annular pressing piece.

[0010] Preferably, a piston guiding surface is provided at the bottom end of the piston, and the piston guiding surface is arranged in fit with the copper bar.

[0011] Preferably, the outer wall of the copper bar is arranged in fit with the inner wall of the groove, and an interference fit is provided between the copper bar and the groove.

[0012] Preferably, the outer wall of the hexagonal screw is coated with anaerobic adhesive.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: the guide rail structure of the piston type flow regulating valve has a reasonable structural design.

[0014] By providing a groove at the bottom of the valve body, arranging a copper bar in the groove, the piston is matched with the copper bar through the piston guiding surface, and the copper bar is fixed by a hexagonal screw, replacing the traditional welding process.

[0015] The processing cost of the valve body guide rail and the copper bar is low, and the process is simple; the copper bar is made of aluminum bronze, which has good wear resistance and corrosion resistance, small friction coefficient and long service life. Under special high-frequency working conditions, the copper bar can be replaced after wear, and the later maintenance of the valve is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the present utility model;

[0017] Figure 2 is a partial structural schematic diagram A of the present utility model;

[0018] Figure 3 is a schematic diagram of the hexagonal screw of the present utility model;

[0019] Figure 4 is a schematic diagram of the anti-loosening screw barrel of the present utility model.

[0020] In the figure: 1. Valve body; 2. Valve body guide rail; 3. Copper strip; 4. Groove; 5. Piston; 6. Hexagonal screw; 7. Countersunk hole; 8. Anti - detachment thread groove; 9. Anti - detachment screw barrel; 10. Anti - detachment rod; 11. Threaded hole; 12. Fixed ring; 13. Extrusion block; 14. Annular pressing sheet; 15. Annular rubber sheet; 16. Spring; 17. Limit post; 18. Spiral groove; 19. Piston guiding surface. Detailed implementation mode

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 - 4 , the present utility model provides a technical solution:

[0023] In this technical solution, a guide rail structure of a piston - type flow - regulating valve includes a valve body 1 and a piston 5. The inner bottom end of the valve body 1 is equipped with a valve body guide rail 2. At both ends of the valve body guide rail 2 at the bottom end of the valve body 1, grooves 4 are opened. Copper strips 3 are assembled in the grooves 4. The piston 5 is arranged above the copper strips 3. Countersunk holes 7 are evenly and equidistantly opened at the upper end of the copper strips 3. Threaded holes 11 are evenly and equidistantly opened at the bottom end of the grooves 4. The positions of the threaded holes 11 and the countersunk holes 7 correspond one by one. An anti - detachment screw barrel 9 is fixedly assembled at the inner bottom end of the threaded hole 11. A hexagonal screw 6 is assembled in the countersunk hole 7 and the threaded hole 11. An anti - detachment thread groove 8 is opened at the bottom end of the hexagonal screw 6. An anti - detachment rod 10 is vertically installed inside the anti - detachment screw barrel 9, and the anti - detachment rod 10 is screwed into the anti - detachment thread groove 8.

[0024] In this technical solution, the valve body 1 and the piston 5 are parts of a piston - type flow - regulating valve in the prior art. Other parts are the same as those in the prior art and will not be described in this case. According to the shape and size of the copper strip 3, the groove 4 is set, and the copper strip 3 is fixedly embedded in the groove 4. The piston 5 can move above the copper strip 3. After the copper strip 3 is installed in the groove 4, the countersunk holes 11 on the copper strip 3 correspond to the threaded holes 11 in the groove 4 one by one. The anti - detachment screw barrel 9 is a pre - fabricated part, a cylindrical barrel, fixedly installed at the inner bottom end of the threaded hole 11. The hexagonal screw 6 can be screwed into the threaded hole 11, and the nut part of the hexagonal screw 6 is placed in the countersunk hole 7. The hexagonal screw 6 is sleeved outside the anti - detachment rod 10 through the anti - detachment thread groove 8.

[0025] In some technical solutions, refer to Figures 1 - 4, three limit posts 17 are installed on the outer wall of the anti-loosening screw cylinder 9, and the three limit posts 17 are distributed in a triangular shape; a spiral groove 18 matching with the hexagonal screw 6 is formed on the inner wall of each limit post 17;

[0026] In this technical solution, when the hexagonal screw 6 is screwed into the threaded hole 11, the bottom end of the hexagonal screw 6 can extend into the anti-loosening screw cylinder 9, and the spiral groove 18 provided on the limit post 17 cooperates with the external thread of the hexagonal screw 6, so as to clamp the limit post 17 outside the hexagonal screw 6 and fasten it.

[0027] In some technical solutions, refer to Figures 1 - 4 , an external thread matching with the internal thread of the anti-loosening screw groove 8 is formed on the outer wall of the anti-loosening rod 10, and the thread helix direction is opposite to that of the hexagonal screw 6;

[0028] In this technical solution, when the hexagonal screw 6 is screwed into the threaded hole 1 and its bottom end enters the anti-loosening screw cylinder 9, with further rotation, the anti-loosening rod 10 enters the anti-loosening screw groove 8 under the thread cooperation.

[0029] In some technical solutions, refer to Figures 1 - 4 , a fixing ring 12 is fixedly installed at the upper end of the external part of the hexagonal screw 6, and an annular pressing piece 14, a spring 16 and an annular rubber piece 15 are sleeved on the circumferential surface of the hexagonal screw 6;

[0030] In this technical solution, the outer diameters of the annular pressing piece 14 and the annular rubber piece 15 are larger than the inner diameter of the threaded hole 11.

[0031] In some technical solutions, refer to Figures 1 - 4 , the annular pressing piece 14 is located above the fixing ring 12, the spring 16 is located above the annular pressing piece 14, the annular rubber piece 15 is located below the fixing ring 12, and an extrusion block 13 is fixedly installed at the lower edge of the lower end of the annular pressing piece 14;

[0032] In this technical solution, when the hexagonal screw 6 is rotated, the annular rubber piece 15 slides upward due to the effect of the screw hole. With further screwing, the annular rubber piece 15 contacts the fixing ring 12, and the annular rubber piece 15 deforms due to the effect of the fixing ring 12 to seal the screw hole. The spring 16 is located above the annular pressing piece 14, so that the annular pressing piece 14 is pressed downward due to the effect of the spring 16, and the extrusion block 13 is pressed downward due to the effect of the annular pressing piece 14, so that the extrusion block 13 further presses the edge of the annular rubber piece 15, thereby improving the sealing effect. The annular pressing piece 14 is located above the fixing ring 12, the spring 16 is located above the annular pressing piece 14, the annular rubber piece 15 is located below the fixing ring 12, and an extrusion block 13 is fixedly installed at the lower edge of the lower end of the annular pressing piece 14.

[0033] In some technical solutions, refer to Figures 1 - 4, a piston guide surface 19 is provided at the bottom end of the piston 5, and the piston guide surface 19 is arranged in contact with the copper bar 3; the outer wall of the copper bar 3 is arranged in contact with the inner wall of the groove 4, and an interference fit is provided between the copper bar 3 and the groove 4;

[0034] In this technical solution, when the piston 5 moves on the guide rail, the copper bar 3 is mainly subjected to axial friction, and the copper bar 3 is not easily loosened after being embedded.

[0035] In some technical solutions, refer to Figures 1 - 4 , anaerobic glue is coated on the outer wall of the hexagon screw 6;

[0036] In this technical solution, anaerobic glue is applied to the thread to prevent loosening.

[0037] Working principle: When in use, first, a groove 4 is machined on the valve body 1. The two ends of the groove 4 and the copper bar 3 are in interference fit. A threaded hole 11 is machined in the groove 4, and a counterbore 7 is machined on the copper bar 3. The copper bar 3 is fixed by an internal hexagon screw 6, and anaerobic glue is applied to the thread to prevent loosening. When the piston 5 moves on the guide rail, the copper bar 3 is mainly subjected to axial friction, and the copper bar 3 is not easily loosened after being embedded.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprises", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0039] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention can be combined with each other in any way, and the exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A guide rail structure of a piston type flow regulating valve, comprising a valve body (1) and a piston (5), characterized in that: A valve body guide rail (2) is assembled at the inner bottom end of the valve body (1). Grooves (4) are formed at both ends of the bottom end of the valve body (1) and located on the valve body guide rail (2). A copper bar (3) is assembled in the groove (4). A piston (5) is arranged at the upper end of the copper bar (3). Countersunk holes (7) are evenly and equidistantly formed at the upper end of the copper bar (3). Threaded holes (11) are evenly and equidistantly formed at the bottom end of the groove (4). The positions of the threaded holes (11) and the countersunk holes (7) correspond one by one. An anti-loosening screw barrel (9) is fixedly assembled at the inner bottom end of the threaded hole (11). A hexagonal screw (6) is assembled in the countersunk hole (7) and the threaded hole (11). An anti-loosening screw groove (8) is formed at the bottom end of the hexagonal screw (6). An anti-loosening rod (10) is vertically installed inside the anti-loosening screw barrel (9). The anti-loosening rod (10) is screwed in the anti-loosening screw groove (8).

2. The guide rail structure of a piston type flow regulating valve according to claim 1, characterized in that: Three limit posts (17) are installed on the outer wall of the anti-loosening screw barrel (9). The three limit posts (17) are distributed in a triangular shape; a spiral groove (18) matching the hexagonal screw (6) is formed on the inner wall of each limit post (17).

3. The guide rail structure of a piston type flow regulating valve according to claim 2, characterized in that: External threads matching the internal threads of the anti-loosening screw groove (8) are formed on the outer wall of the anti-loosening rod (10), and the thread helix direction is opposite to that of the hexagonal screw (6).

4. The guide rail structure of a piston type flow regulating valve according to claim 1, characterized in that: A fixing ring (12) is fixedly installed at the upper end of the outer part of the hexagonal screw (6). An annular pressing piece (14), a spring (16) and an annular rubber piece (15) are sleeved on the circumferential surface of the hexagonal screw (6).

5. The guide rail structure of a piston type flow regulating valve according to claim 4, characterized in that: The annular pressing piece (14) is located above the fixing ring (12). The spring (16) is located above the annular pressing piece (14). The annular rubber piece (15) is located below the fixing ring (12). An extrusion block (13) is fixedly installed at the lower edge of the annular pressing piece (14).

6. The guide rail structure of a piston type flow regulating valve according to claim 1, characterized in that: A piston guide surface (19) is formed at the bottom end of the piston (5). The piston guide surface (19) is arranged in a fitting manner with the copper bar (3).

7. The guide rail structure of a piston type flow regulating valve according to claim 1, characterized in that: The outer wall of the copper bar (3) is arranged in a fitting manner with the inner wall of the groove (4), and an interference fit is provided between the copper bar (3) and the groove (4).

8. The guide rail structure of a piston type flow regulating valve according to claim 1, characterized in that: Anaerobic glue is coated on the outer wall of the hexagonal screw (6).

Images