Ore pulp valve with sealing ring convenient to replace

Abstract

According to the technical scheme, the ore pulp valve convenient to replace the sealing rings is characterized by comprising two half valve bodies capable of being spliced together to form a valve body, a gate plate inserted into the valve body in a penetrating mode, the two sealing rings located on the two sides of the gate plate respectively, and two neck bushes matched with inner cavities of the two half valve bodies respectively. The two sealing rings are detachably connected to the ends, facing the gate plate, of the two neck bushes correspondingly, connecting rings detachably connected with the corresponding half valve bodies are arranged at the ends, away from the gate plate, of the two neck bushes, and compensation springs used for pushing the corresponding sealing rings to the gate plate are arranged in the ends of the two neck bushes correspondingly. The compensation spring pushes the sealing ring so that the sealing ring can be attached to the flashboard all the time, and the problems that in the prior art, the sealing ring is prone to damage and complex to replace, and the flashboard opening and closing efficiency is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, and more particularly to a slurry valve with a sealing ring that is convenient for replacing. Background Art

[0002] Slurry gate valves are mainly used in fluid conveying pipelines with materials in mining and mineral processing plants. Several common valve products suitable for slurry pipelines on the market, such as gate valves, wear-resistant ball valves and other valves, have large body cavities due to structural limitations, which will cause slurry media to deposit in the body cavities. The emergence of plug-in type slurry gate valves has solved some of the deposition problems. Since the gate of the plug-in type slurry gate valve will partially pass through the valve body and be exposed to the air, it has high requirements for sealing. The valve body of the plug-in type slurry gate valve is mostly of the wafer type and sealing rings are installed on the two opposing half valve bodies. By fixing the two half valve bodies together, the two sealing rings can be tightly connected to the gate surface. There are defects in such design. First, the sealing ring is made of soft material. The medium transported by the slurry gate valve is mostly solid or some liquid medium is mixed with a large amount of solid impurities. The sealing ring is easily worn and leaks. When replacing the sealing ring, the valve body needs to be split into two half-valve bodies, which will require reassembly of other parts, making maintenance operations complicated and reducing maintenance efficiency. Second, due to the processing size error of the half-valve body or the size error of the sealing ring itself, after the two half-valve bodies are connected together, it is easy for the extrusion pressure between the sealing ring and the gate to be too large, resulting in an increase in the external force required to move the gate, affecting the opening and closing efficiency of the gate. Utility Model Content

[0003] In view of the shortcomings of the prior art, the utility model aims to provide a slurry valve which is easy to replace the sealing ring and easy to open and close.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a slurry valve with easy replacement of sealing rings, comprising two half-valve bodies that can be assembled into a valve body, a gate plate inserted in the valve body, two sealing rings respectively located on both sides of the gate plate, and two inner sleeves respectively matching the inner cavities of the two half-valve bodies, the two sealing rings are respectively detachably connected to the ends of the two inner sleeves facing the gate plate, and the ends of the two inner sleeves away from the gate plate are provided with connecting rings detachably connected to the corresponding half-valve bodies, and the ends of the two inner sleeves are provided with compensation springs for pushing the corresponding sealing rings toward the gate plate, and the sealing rings are always kept in contact with the gate plate by pushing the sealing rings through the compensation springs.

[0005] As a further improvement of the utility model, the two inner sleeves include an inner lining body, a limiting ring body positioned on the end face of the inner lining body facing the gate plate, an inner limiting ring that can be connected to the inner wall of the limiting ring body, an outer limiting ring that can be connected to the outer wall of the limiting ring body, and connecting bolts that can connect the outer limiting ring, the limiting ring body and the inner limiting ring in sequence. The limiting ring body is provided with a guide groove for partially accommodating a compensation spring. The limiting ring body, the inner limiting ring and the outer limiting ring together form a compensation groove with a T-shaped cross-section and coaxial with the inner lining body. The small end of the compensation groove faces the gate plate and matches the ring diameter of the sealing ring. The sealing ring is located on the surface of the compensation groove and is provided with an anti-slip ring that can contact the compensation spring and be limited in the large end of the compensation groove. The sealing ring can be separated from the inner lining body by removing the outer limiting ring and the inner limiting ring from the limiting ring body.

[0006] As a further improvement of the present invention, the inner diameter of the inner limiting ring is the same as the inner diameter of the lining body, and the outer diameter of the outer limiting ring is the same as the outer diameter of the lining body.

[0007] As a further improvement of the utility model, alignment strips are arranged on the end surfaces of the inner limit ring and the outer limit ring away from the gate plate, and alignment grooves matching the alignment strips are arranged on the inner wall and the outer wall of the lining body.

[0008] As a further improvement of the present invention, an auxiliary sealing ring is provided between the limiting ring body and the inner limiting ring and is farther away from the gate plate than the connecting bolts.

[0009] As a further improvement of the utility model, a hard force-bearing ring sheet coaxial with the inner sleeve is arranged between the compensation spring and the sealing ring.

[0010] As a further improvement of the present invention, a sealing member is provided between the connecting ring and the corresponding half valve body.

[0011] The beneficial effects of the utility model are as follows: compared with the design of installing the sealing ring on the inner wall of the semi-valve body in the prior art, the design of detachably connecting the sealing ring to the inner sleeve can realize the replacement of the sealing ring without disassembling the valve body, thereby ensuring the stable connection of other components, reducing the difficulty of replacing the sealing ring and improving the maintenance efficiency; compared with the prior art, the design of the compensation spring pushing the sealing ring toward the gate plate can provide a relatively mild pre-tightening force between the sealing ring and the gate plate, compensating for the defect of the prior art that the sealing ring and the gate plate are excessively fitted due to dimensional processing errors, thereby affecting the opening and closing of the gate plate; at the same time, after the sealing ring is worn, the compensation spring can push the sealing ring to continue to fit with the gate plate, thereby ensuring the sealing, extending the service life of the sealing ring and reducing the number of maintenance times. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional diagram of the inner liner in the utility model;

[0013] Figure 2 for Figure 1 Exploded diagram of

[0014] Figure 3 for Figure 2 The exploded view of the spring and guide groove after the structure transformation;

[0015] Figure 4 It is the front view of the utility model;

[0016] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0017] Figure numerals: 1. half valve body; 2. gate; 3. sealing ring; 4. inner sleeve; 41. inner lining body; 42. limiting ring body; 421. guide groove; 43. inner limiting ring; 44. outer limiting ring; 45. connecting bolt; 46. compensation groove; 47. anti-slip ring; 48. alignment strip; 49. alignment groove; 40. auxiliary sealing ring; 5. connecting ring; 6. compensation spring; 7. force-bearing ring; 8. sealing element. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, wherein the same components are indicated by the same reference numerals.

[0019] Reference Figures 1 to 5 As shown, a slurry valve for facilitating replacement of a sealing ring in this embodiment comprises two half valve bodies 1 that can be assembled together to form a valve body, a gate plate 2 inserted into the valve body, and two sealing rings 3 respectively located on both sides of the gate plate 2;

[0020] Based on the aforementioned prior art, it also includes two inner bushings 4, each of which includes an inner lining body 41, a limiting ring body 42, an inner limiting ring 43, an outer limiting ring 44 and a plurality of connecting bolts 45. The limiting ring body 42 and the connecting ring 5 are respectively integrally formed at both ends of the inner lining body 41. The limiting ring body 42 and the connecting ring 5 are coaxial with the inner lining body 41. The inner diameter of the connecting ring 5 is the same as that of the inner lining body 41 and the outer diameter is larger than the outer diameter of the inner lining body 41. A groove for the connecting ring 5 to be installed is provided at the flow channel port of the half valve body 1 away from the gate plate 2. The connecting ring 5 can be passed through the bolt and screwed into the half valve body 1 so that the connecting ring 5 is fixedly connected to the half valve body 1. The inner diameter of the limiting ring body 42 is larger than the inner diameter of the inner lining body 41 and the outer diameter of the limiting ring body 42 is larger than the outer diameter of the inner lining body 41. The diameter is smaller than the outer diameter of the lining body 41, and a guide groove 421 coaxially arranged with the lining body 41 is opened in the limiting ring body 42 by the end surface of the limiting ring body 42 that is not connected to the lining body 41. The opening width of the guide groove 421 is smaller than the ring diameter of the sealing ring 3. The cross-sections of the inner limiting ring 43 and the outer limiting ring 44 in the circumferential direction of the lining body 41 are both L-shaped. The outer limiting ring 44, the limiting ring body 42 and the inner limiting ring 43 are respectively provided with countersunk holes, through holes and threaded grooves distributed along the radial direction of the lining body 41. Compared with the threaded holes, the threaded grooves can prevent the leakage of the medium and ensure the connection stability of the connecting bolts 45. An anti-slip ring 47 is integrally formed on one end of the two sealing rings 3. The inner diameter of the anti-slip ring 47 is smaller than the inner diameter of the sealing ring 3 and the outer diameter of the anti-slip ring 47 is larger than the outer diameter of the sealing ring 3;

[0021] The assembly steps of the inner bushing 4 are as follows: partially install the compensation spring 6 into the guide groove 421, then place the anti-drop ring 47 on the end of the compensation spring 6 exposed outside the guide groove 421, and then install the inner limit ring 43 and the outer limit ring 44 on the inner and outer sides of the sealing ring 3 in turn until the inner limit ring 43 and the outer limit ring 44 are in contact with the end surface of the inner lining body 41, and then rotate the inner limit ring 43 and the outer limit ring 44 relative to the inner lining body 41 so that the countersunk hole, the through hole and the threaded groove are All of them are on the same straight line, and finally one end of the connecting bolt 45 is passed through the countersunk hole and the through hole in sequence and screwed into the threaded groove until the nut of the connecting bolt 45 is completely inserted into the countersunk hole, then the inner limiting ring 43, the limiting ring body 42 and the outer limiting ring 44 are connected in place, and the limiting ring body 42, the inner limiting ring 43 and the outer limiting ring 44 jointly enclose a compensation groove 46 with a T-shaped cross-section and coaxial with the liner body 41, and the ring diameter formed by the small end of the compensation groove 46 matches the ring diameter of the sealing ring 3, The ring diameter formed at the large end of the compensation groove 46 is larger than the ring diameter of the anti-slip ring 47 and the height of the large end of the compensation groove 46 is larger than the thickness of the anti-slip ring 47. After the inner bushing 4 is assembled, the compensation spring 6 pushes the anti-slip ring 47 so that the anti-slip ring 47 fits with the stepped surface of the compensation groove 46. The sealing ring 3 partially passes out of the compensation groove 46 and the inner wall and outer wall of the sealing ring 3 fit with the inner limit ring 43 and the outer limit ring 44 respectively. The assembled inner bushing 4 is installed in the corresponding half valve body 1, and the bolts are passed through The connecting ring 5 is screwed into the half valve body 1 so that the inner sleeve 4 is fixedly connected to the half valve body 1. The sealing ring 3 will first contact the gate plate 2 and then gradually retreat a part of it into the compensation groove 46, and the compensation spring 6 will be elastically compressed. When the sealing ring 3 is damaged, the connecting ring 5 and the half valve body 1 are first separated and the inner sleeve 4 is removed from the half valve body 1. Then the connecting bolts 45 are removed so that the inner limit ring 43 and the outer limit ring 44 can be detached from the inner lining body 41, and finally the sealing ring 3 is replaced.

[0022] Compared with the prior art design in which the sealing ring 3 is installed on the inner wall of the half valve body 1, the design in which the sealing ring 3 is detachably connected to the inner sleeve 4 can realize the replacement of the sealing ring 3 without disassembling the valve body, thereby ensuring the stable connection of other components, reducing the difficulty of replacing the sealing ring 3 and improving the maintenance efficiency; compared with the prior art, the design in which the compensation spring 6 pushes the sealing ring 3 toward the gate plate 2 can provide a relatively mild pre-tightening force between the sealing ring 3 and the gate plate 2, compensating for the defect of the prior art that the sealing ring 3 and the gate plate 2 are excessively fitted due to dimensional processing errors, thereby affecting the opening and closing of the gate plate; at the same time, after the sealing ring 3 is worn, the compensation spring 6 can push the sealing ring 3 to continue to fit with the gate plate 2, thereby ensuring the sealing performance, extending the service life of the sealing ring 3 and reducing the number of maintenance times; the T-shaped design of the compensation groove 46 and the design of the anti-slip ring 47 can prevent the sealing ring 3 from adhering to the gate plate 2 and being unable to be removed from the half valve body 1 with the inner sleeve 4.

[0023] As a specific implementation method of the improvement, refer to Figure 4 and Figure 5 As shown, the inner diameter of the inner limit ring 43 is the same as the inner diameter of the lining body 41. Compared with the design in which the inner diameter of the inner limit ring 43 is different from the inner diameter of the lining body 41, such a design can avoid the medium from generating thrust on the inner limit ring 43 or the lining body 41 at the step between the inner limit ring 43 and the lining body 41, thereby ensuring the connection stability between the lining body 41 and the inner limit ring 43; the outer diameter of the outer limit ring 44 is the same as the outer diameter of the lining body 41. Compared with the design in which the outer diameter of the outer limit ring 44 is larger than the outer diameter of the lining body 41, such a design can ensure that the outer walls of both the lining body 41 and the outer limit ring 44 can fit against the inner wall of the half valve body 1, thereby improving the connection stability.

[0024] As a specific implementation method of the improvement, refer to Figures 1 to 3 As shown, an alignment strip 48 is integrally formed on the end surface of the inner limit ring 43 and the outer limit ring 44 away from the gate plate 2, and an alignment groove 49 matching the alignment strip 48 is provided on the inner wall and the outer wall of the lining body 41. By first aligning the alignment strip 48 with the alignment groove 49 and inserting the alignment strip 48 into the alignment groove 49, the inner limit ring 43 and the outer limit ring 44 cannot rotate when installed on the lining body 41. Such a design can ensure that the countersunk holes, through holes and threaded grooves of the outer limit ring 44, the limit ring body 42 and the inner limit ring 43 can be connected to each other, which is convenient for the subsequent installation of the connecting bolts 45, simplifies the installation steps of the outer limit ring 44 and the inner limit ring 43, and improves the installation efficiency.

[0025] As a specific implementation method of the improvement, refer to Figures 2 to 5 As shown, an auxiliary sealing ring 40 is provided between the limiting ring body 42 and the inner limiting ring 43, which is farther away from the gate plate 2 than the connecting bolt 45. Such a design can prevent the medium or the liquid in the medium from leaking into the compensation groove 46 and outside the inner sleeve 4 through the gap between the limiting ring body 42 and the inner limiting ring 43, thereby improving the sealing between the limiting ring body 42 and the inner limiting ring 43.

[0026] As a specific implementation method of the improvement, refer to Figure 5As shown, a force-bearing ring sheet 7 which is coaxial with the inner sleeve 4 and hard is provided between the compensation spring 6 and the sealing ring 3. Compared with the design in which the compensation spring 6 directly contacts the sealing ring 3, such a design can avoid the phenomenon that the end of the compensation spring 6 locally squeezes the sealing ring 3 and causes the sealing ring 3 to be damaged due to uneven force, thereby indirectly ensuring the structural stability of the sealing ring 3; furthermore, the structure of the guide groove 421 and the compensation spring 6 in the first embodiment can be changed, and the guide groove 421 can be designed to be a plurality of column grooves distributed along the contour direction of the sealing ring 3. The number of compensation springs 6 is the same as the number of guide grooves 421 and can be installed one by one in the corresponding guide grooves 421. In this way, the structural strength of the limiting ring body 42 can be improved, while the size and material requirements of the compensation spring 6 can be reduced, thereby reducing the production cost.

[0027] As a specific implementation method of the improvement, refer to Figure 4 As shown, a seal 8 is provided between the connecting ring 5 and the corresponding half valve body 1. Such a design can prevent the medium from leaking from the gap between the connecting ring 5 and the half valve body 1 into the cavity above the gate plate 2, thereby improving the sealing performance.

[0028] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A slurry valve with an easily replaceable sealing ring, comprising two half valve bodies (1) that can be assembled together to form a valve body, a gate plate (2) inserted into the valve body, and two sealing rings (3) respectively located on both sides of the gate plate (2), characterized in that: It also includes two inner sleeves (4) respectively matching the inner cavities of the two half valve bodies (1), the two sealing rings (3) are respectively detachably connected to the ends of the two inner sleeves (4) facing the gate plate (2), and the ends of the two inner sleeves (4) away from the gate plate (2) are provided with connecting rings (5) detachably connected to the corresponding half valve bodies (1), and the ends of the two inner sleeves (4) are provided with compensation springs (6) for pushing the corresponding sealing rings (3) toward the gate plate (2), and the sealing rings (3) are pushed by the compensation springs (6) so that the sealing rings (3) always keep in contact with the gate plate (2).

2. A slurry valve for facilitating replacement of a sealing ring according to claim 1, characterized in that: The two inner bushings (4) include an inner lining body (41), a limiting ring body (42) positioned on the end surface of the inner lining body (41) facing the gate plate (2), an inner limiting ring (43) that can be connected to the inner wall of the limiting ring body (42), an outer limiting ring (44) that can be connected to the outer wall of the limiting ring body (42), and a connecting bolt (45) that can sequentially connect the outer limiting ring (44), the limiting ring body (42) and the inner limiting ring (43). The limiting ring body (42) is provided with a guide groove (421) for partially accommodating the compensation spring (6). The limiting ring body (42), the inner limiting ring (43) and the inner limiting ring (44) are connected to each other. The limiting ring (43) and the outer limiting ring (44) together form a compensation groove (46) with a T-shaped cross section and coaxial with the inner lining body (41); the small end of the compensation groove (46) faces the gate plate (2) and matches the ring diameter of the sealing ring (3); the sealing ring (3) is provided with an anti-slip ring (47) on the surface of the compensation groove (46) that can contact the compensation spring (6) and is limited in the large end of the compensation groove (46); the sealing ring (3) can be separated from the inner lining body (41) by removing the outer limiting ring (44) and the inner limiting ring (43) from the limiting ring body (42).

3. A slurry valve for facilitating replacement of a sealing ring according to claim 2, characterized in that: The inner diameter of the inner limiting ring (43) is the same as the inner diameter of the lining body (41), and the outer diameter of the outer limiting ring (44) is the same as the outer diameter of the lining body (41).

4. A slurry valve for facilitating replacement of a sealing ring according to claim 3, characterized in that: Alignment strips (48) are arranged on the end surfaces of the inner limiting ring (43) and the outer limiting ring (44) away from the gate plate (2), and alignment grooves (49) matching the alignment strips (48) are arranged on the inner wall and the outer wall of the lining body (41).

5. A slurry valve for easy replacement of sealing ring according to claim 2, 3 or 4, characterized in that: An auxiliary sealing ring (40) is provided between the limiting ring body (42) and the inner limiting ring (43), and is farther away from the gate plate (2) than the connecting bolts (45).

6. A slurry valve with convenient seal ring replacement according to claim 1, 2, 3 or 4, characterized in that: A hard force-bearing ring sheet (7) coaxial with the inner sleeve (4) is arranged between the compensation spring (6) and the sealing ring (3).

7. A slurry valve with convenient seal ring replacement according to claim 1, 2, 3 or 4, characterized in that: A sealing member (8) is provided between the connecting ring (5) and the corresponding half valve body (1).

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