Anti-jamming hard sealing plug valve conical surface structure

Abstract

The utility model discloses an anti-jamming hard sealing plug valve conical surface structure which comprises a valve shell, a plug valve element is rotationally connected to the bottom of an inner cavity of the valve shell through a first rotating shaft, a valve element rod is arranged on the upper side of the plug valve element, and the anti-jamming hard sealing plug valve conical surface structure further comprises a self-lubricating mechanism. The self-lubricating mechanism comprises oil storage cavities, a partition plate, first through holes, second through holes and an opening and closing assembly, the oil storage cavities are formed in the front end and the rear end of the wall body of the valve shell correspondingly, and the second through holes which are evenly distributed are formed in the wall bodies, close to the center of the valve shell, of the oil storage cavities. According to the anti-jamming hard sealing plug valve conical surface structure, impurity filtering can be conducted on liquid flowing through the hard sealing plug valve conical surface through the filtering element, the probability of the plug valve opening and closing jamming phenomenon is reduced, meanwhile, the device conducts automatic lubricating operation on the hard sealing plug valve conical surface, and the safety of the device is improved. The moving friction force of the part is reduced, abrasion is reduced, the sealing performance is improved, and the probability that the conical surface of the hard sealing plug valve is jammed is further reduced.

Description

Technical Field

[0001] This utility model relates to the field of plug valve technology, specifically to a cone-shaped structure for a hard-seal plug valve that prevents jamming. Background Technology

[0002] A plug valve is a rotary valve with a shut-off element or plunger. It is a type of valve that opens or closes by rotating 90 degrees to connect or separate the passage on the plug from the passage on the valve body. The plug can be cylindrical or conical in shape.

[0003] In the prior art, patent CN 219263233 U discloses a plug valve based on an anti-jamming structure, which avoids direct contact between the valve body and the valve core assembly, thus ensuring the normal rotation of the valve core assembly. However, during the use of this device, impurities in the liquid may be adsorbed into the annular mounting groove of the device, blocking the relative sliding between the valve core assembly, the protective sleeve, and the valve body. Furthermore, with long-term opening and closing, the opening and closing parts of the plug valve may experience wear due to frequent contact. Therefore, we propose a cone-shaped structure for an anti-jamming hard-seal plug valve. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a hard-seal plug valve conical surface structure that prevents jamming. This device can filter impurities in the liquid flowing through the conical surface of the hard-seal plug valve through a filter element, reducing the probability of jamming when the plug valve is opened and closed. At the same time, the device automatically lubricates the conical surface of the hard-seal plug valve, reducing the moving friction, reducing wear and improving the sealing performance, further reducing the probability of jamming when the conical surface of the hard-seal plug valve is jammed, and can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a cone-shaped structure for a hard-seal plug valve that prevents jamming, comprising a valve housing, wherein a plug valve core is rotatably connected to the bottom of the inner cavity of the valve housing via a rotating shaft, a valve core rod is provided on the upper side of the plug valve core, and a self-lubricating mechanism is also included.

[0006] The self-lubricating mechanism includes an oil reservoir, a partition plate, a first through hole, a second through hole, and an opening and closing assembly. The oil reservoir is respectively located at the front and rear ends of the valve body wall. The walls of the oil reservoir near the center of the valve body are provided with evenly distributed second through holes. The walls of the oil reservoir near the center of the valve body are slidably in contact with partition plates. The interior of each partition plate is provided with evenly distributed first through holes. An opening and closing assembly is provided between the first rotating shaft, the valve body, and the partition plate.

[0007] Furthermore, both the left and right ends of the valve body are equipped with annular filter plates, and both the left and right ends of the valve body are equipped with flanges to filter impurities from the liquid flowing through the cone surface of the hard-seal plug valve.

[0008] Furthermore, the opening and closing assembly includes a truncated cone seat, an annular undulating groove, a rectangular rod, and a connecting slide column. The truncated cone seat is located on the outer side of the rotating shaft. An annular undulating groove is formed on the outer side of the truncated cone seat. Two symmetrically distributed connecting slide columns slide in sliding contact inside the annular undulating groove. A rectangular rod is provided at the opposite ends of the two connecting slide columns. The upper ends of the rectangular rods pass through the rectangular grooves formed in the valve body wall and are fixedly connected to the adjacent partition plate. This allows the opening and closing assembly to adaptively and synchronously perform opening and closing operations in accordance with the opening and closing of the anti-jamming hard-seal plug valve cone surface structure.

[0009] Furthermore, the self-lubricating mechanism also includes telescopic columns, springs, and extrusion plates. The extrusion plates are slidably connected to the inside of the oil storage chamber. The wall of the oil storage chamber away from the center of the valve body and the adjacent extrusion plates are provided with evenly distributed telescopic columns and springs. The springs are movably sleeved with the outer ends of the adjacent telescopic columns, so that the lubricating oil in the anti-jamming hard-seal plug valve cone structure can be moved out of the oil storage chamber under a certain pressure and act on the hard-seal plug valve cone.

[0010] Furthermore, the self-lubricating mechanism also includes a sealing assembly, which includes a rubber sealing ring one, a rubber sealing strip, and a rubber sealing ring two. The rubber sealing ring one is respectively disposed on the outer side of the extrusion plate, and the side of the partition plate near the center of the valve body is provided with a rubber sealing strip. The upper end of the rectangular groove is provided with a rubber sealing ring two, which seals the operation of the self-lubricating mechanism in the cone surface structure of the anti-jamming hard-seal plug valve.

[0011] Furthermore, the inner wall of the valve housing is provided with two vertically distributed rubber sealing rings three times to seal the upper and lower ends of the conical part of the anti-jamming hard-seal plug valve conical structure.

[0012] Furthermore, the top wall of the oil storage chamber is provided with an oil delivery pipe, the upper end of which passes through the wall of the valve body and is threadedly connected to a threaded plug to fill the oil storage chamber of the anti-jamming hard-seal plug valve cone structure with lubricating oil.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] When using a hard-seal plug valve cone structure with anti-jamming, the filter element can filter impurities from the liquid flowing through the cone surface of the hard-seal plug valve, reducing the probability of jamming during opening and closing. At the same time, the device can automatically lubricate the cone surface of the hard-seal plug valve through components such as the oil reservoir, partition plate, through hole one, through hole two, opening and closing assembly, telescopic column, spring, and compression plate. By reducing the moving friction of this part, reducing wear, and improving sealing, the probability of jamming on the cone surface of the hard-seal plug valve is further reduced. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the left-side cross-sectional structure of the present invention;

[0018] Figure 4 This is an enlarged structural diagram of point A in this utility model;

[0019] Figure 5 This is a schematic diagram of the truncated cone base structure of this utility model.

[0020] In the diagram: 1 Valve housing, 2 Flange, 3 Shaft I, 4 Plug valve core, 5 Valve core rod, 6 Annular filter plate, 7 Self-lubricating mechanism, 71 Oil reservoir, 72 Divider plate, 73 Through hole I, 74 Through hole II, 75 Opening and closing assembly, 751 Conical seat, 752 Annular undulating groove, 753 Rectangular rod, 754 Connecting slide, 76 Telescopic column, 77 Spring, 78 Extrusion plate, 79 Sealing assembly, 791 Rubber sealing ring I, 792 Rubber sealing strip, 793 Rubber sealing ring II, 8 Rubber sealing ring III, 9 Oil pipe, 10 Threaded plug. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This embodiment provides a technical solution: a hard-seal plug valve conical structure for preventing jamming, including a valve body 1, a plug valve core 4 rotatably connected to the bottom of the inner cavity of the valve body 1 via a rotating shaft 3, a valve core rod 5 on the upper side of the plug valve core 4, and two vertically distributed rubber sealing rings 8 in the middle of the inner wall of the valve body 1, which seal the rotation gaps at the upper and lower ends between the plug valve core 4 and the valve body 1 through the rubber sealing rings 8, and also includes a self-lubricating mechanism 7;

[0023] The self-lubricating mechanism 7 includes an oil storage chamber 71, a partition plate 72, a first through hole 73, a second through hole 74, and an opening and closing assembly 75. The oil storage chamber 71 is respectively opened at the front and rear ends of the valve housing 1 wall. The walls of the oil storage chamber 71 near the center of the valve housing 1 are provided with evenly distributed second through holes 74. The walls of the oil storage chamber 71 near the center of the valve housing 1 are slidably in contact with the partition plate 72. The interior of the partition plate 72 is provided with evenly distributed vertical first through holes 73. The opening and closing assembly 75 is provided between the rotating shaft 3, the valve housing 1, and the partition plate 72. The interior of the left and right ends of the valve housing 1 is provided with annular filter plates 6. The left and right ends of the valve housing 1 are provided with flanges 2.

[0024] The opening and closing assembly 75 includes a truncated cone seat 751, an annular undulating groove 752, a rectangular rod 753, and a connecting slide column 754. The truncated cone seat 751 is located on the outside of the rotating shaft 3. The annular undulating groove 752 is provided on the outside of the truncated cone seat 751. There are two symmetrically distributed connecting slide columns 754 sliding in contact inside the annular undulating groove 752. The opposite ends of the two connecting slide columns 754 are provided with rectangular rods 753. The upper ends of the rectangular rods 753 pass through the rectangular grooves opened in the wall of the valve housing 1 and are fixedly connected to the adjacent partition plate 72.

[0025] The self-lubricating mechanism 7 also includes a telescopic column 76, a spring 77 and a pressing plate 78. The pressing plate 78 is slidably connected to the inside of the oil storage chamber 71. The wall of the oil storage chamber 71 away from the center of the valve housing 1 and the adjacent pressing plate 78 are provided with evenly distributed telescopic columns 76 and springs 77. The springs 77 are all movably sleeved with the outer end of the adjacent telescopic column 76.

[0026] The self-lubricating mechanism 7 also includes a sealing component 79, which includes a rubber sealing ring 791, a rubber sealing strip 792, and a rubber sealing ring 793. The rubber sealing ring 791 is respectively disposed on the outer side of the extrusion plate 78. The partition plate 72 is provided with a rubber sealing strip 792 on the side near the center of the valve housing 1. The upper end of the rectangular groove is provided with a rubber sealing ring 793. The top wall of the oil storage cavity 71 is provided with an oil supply pipe 9. The upper end of the oil supply pipe 9 passes through the wall of the valve housing 1 and is threadedly connected to a threaded plug 10.

[0027] The working principle of this utility model is as follows:

[0028] When using the anti-jamming hard-seal plug valve cone structure, the flange 2 facilitates connection of the device to the external pipeline. The oil storage chamber 71 is filled with water-resistant lubricating grease. The annular filter plate 6 filters impurities from the liquid passing through the plug valve cone, preventing impurities from adhering to the surface of the plug valve core 4 and causing the plug valve core 4 to move and jam when rotating in the valve body 1. The valve core rod 5 drives the outer cone surface of the plug valve core 4 to rotate 90 degrees along the inner cone surface of the valve body 1, thereby realizing the opening and closing operation of the plug valve.

[0029] Initially, the plug valve is in the open state, and the spring 77 inside the device is in the compressed state. At this time, the partition plates 72 are all in the highest position of vertical movement. The through holes 73 on the partition plates 72 are connected to the adjacent through holes 74. The compression force of the spring 77 causes the extrusion plate 78 to move along the wall of the oil storage chamber 71 towards the center of the device, thereby squeezing out the water-resistant grease in the oil storage chamber 71 through the through holes 73 and 74. This allows the water-resistant grease to act on the outer side of the corresponding part of the plug valve core 4, thereby lubricating the hard sealing cone surface between the plug valve core 4 and the valve body 1, improving the relative smoothness of movement between the two, and further improving the anti-jamming effect of the device on the operation of the hard sealing plug valve cone surface structure.

[0030] The connecting slide columns 754 are all located at the highest points of both ends of the annular undulating groove 752. Since the annular undulating groove 752 is ring-shaped with only two undulations, and the connecting slide columns 754 are symmetrically distributed, when the cone seat 751 drives the annular undulating groove 752 to rotate 90 degrees, and the plug valve closes from the open state through this 90-degree rotation, the connecting slide columns 754 slide along the annular undulating groove 752, causing the rectangular rod 753 to move vertically downwards along the rectangular groove, driving the partition plate 72. Simultaneously, the sliding depth of the connecting slide columns 754 within the annular undulating groove 752 adaptively changes (connecting slide columns...). 754 itself, through a reasonable length design, can meet the sliding contact relationship with the annular undulating groove 752 at any time. The partition plate 72 slides vertically down along the wall corresponding to the oil storage cavity 71, so that the non-through hole 1 73 area on the partition plate 72 blocks and covers the through hole 2 74, preventing the water-resistant grease in the oil storage cavity 71 from entering the middle through cavity of the plug valve core 4 through the same principle after the plug valve is closed (the annular undulating groove 752 is vertically opened to the conical surface of the truncated cone seat 751, the taper of the truncated cone seat 751, the taper of the plug valve core 4, the vertical inclination of the partition plate 72 and the vertical inclination of the rectangular rod 753 are the same, thus ensuring the realization of this operation mode).

[0031] During the use of the hard-seal plug valve conical structure, the sliding gap between the extrusion plate 78 and the wall of the oil storage chamber 71 is sealed by the rubber sealing ring 791, the sliding gap between the partition plate 72 and the wall of the oil storage chamber 71 is sealed by the rubber sealing strip 792, the sliding gap between the rectangular rod 753 and the rectangular groove is sealed by the rubber sealing ring 793, and the rotation gap at both ends between the plug valve core 4 and the valve body 1 is sealed by the rubber sealing ring 8. The threaded plug head 10 is rotated to remove it from the oil supply pipe 9, and then water-resistant grease is filled into the oil storage chamber 71 through the oil supply pipe 9. (The water-resistant grease is a water-resistant and corrosion-resistant grease made by special process of thickened synthetic oil with special compound sulfonate and added with various additives such as anti-wear, anti-oxidation and anti-corrosion. This calcium sulfonate water-resistant grease has a density greater than water and is often used under harsh conditions such as water flushing, seawater erosion, high temperature or high load.)

[0032] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cone-shaped structure for a hard-seal plug valve with anti-jamming properties, comprising a valve housing (1), wherein a plug valve core (4) is rotatably connected to the bottom of the inner cavity of the valve housing (1) via a rotating shaft (3), and a valve core rod (5) is provided on the upper side of the plug valve core (4), characterized in that: It also includes a self-lubricating mechanism (7); The self-lubricating mechanism (7) includes an oil storage chamber (71), a partition plate (72), a through hole one (73), a through hole two (74), and an opening and closing assembly (75). The oil storage chamber (71) is respectively opened at the front and rear ends of the valve housing (1) wall. The walls of the oil storage chamber (71) near the center of the valve housing (1) are provided with evenly distributed through holes two (74). The walls of the oil storage chamber (71) near the center of the valve housing (1) are slidably in contact with the partition plate (72). The interior of the partition plate (72) is provided with vertically evenly distributed through holes one (73). The opening and closing assembly (75) is provided between the rotating shaft one (3), the valve housing (1), and the partition plate (72).

2. The anti-jamming hard-seal plug valve conical surface structure according to claim 1, characterized in that: The valve housing (1) is provided with annular filter plates (6) at both the left and right ends, and flanges (2) at both the left and right ends.

3. The anti-jamming hard-seal plug valve conical surface structure according to claim 1, characterized in that: The opening and closing assembly (75) includes a truncated cone seat (751), an annular undulating groove (752), a rectangular rod (753), and a connecting slide column (754). The truncated cone seat (751) is located on the outside of the rotating shaft (3). An annular undulating groove (752) is provided on the outside of the truncated cone seat (751). The annular undulating groove (752) has two symmetrically distributed connecting slide columns (754) in sliding contact inside. The opposite ends of the two connecting slide columns (754) are provided with rectangular rods (753). The upper ends of the rectangular rods (753) pass through the rectangular grooves opened in the wall of the valve housing (1) and are fixedly connected to the adjacent partition plate (72).

4. The anti-jamming hard-seal plug valve conical surface structure according to claim 3, characterized in that: The self-lubricating mechanism (7) also includes telescopic columns (76), springs (77) and extrusion plates (78). The extrusion plates (78) are slidably connected to the inside of the oil storage chamber (71). The wall of the oil storage chamber (71) away from the center of the valve shell (1) and the adjacent extrusion plates (78) are provided with evenly distributed telescopic columns (76) and springs (77). The springs (77) are all movably sleeved with the outer ends of the adjacent telescopic columns (76).

5. The anti-jamming hard-seal plug valve conical surface structure according to claim 4, characterized in that: The self-lubricating mechanism (7) also includes a sealing assembly (79), which includes a rubber sealing ring one (791), a rubber sealing strip (792) and a rubber sealing ring two (793). The rubber sealing ring one (791) is respectively disposed on the outer side of the extrusion plate (78), and the partition plate (72) is provided with a rubber sealing strip (792) on the side near the center of the valve housing (1). The upper end of the rectangular groove is provided with a rubber sealing ring two (793).

6. The anti-jamming hard-seal plug valve conical surface structure according to claim 1, characterized in that: The valve housing (1) has two vertically distributed rubber sealing rings (8) in the middle of its inner wall.

7. The anti-jamming hard-seal plug valve conical surface structure according to claim 1, characterized in that: The top wall of the oil storage chamber (71) is provided with an oil delivery pipe (9), and the upper end of the oil delivery pipe (9) passes through the wall of the valve body (1) and is threadedly connected with a threaded plug (10).

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