Butterfly valve convenient to maintain

Abstract

The butterfly valve convenient to maintain comprises a valve seat, a butterfly plate and a valve rod, the butterfly plate is located on the inner side of the valve seat, the valve rod is connected with the butterfly plate after penetrating through the valve seat, a hand wheel is arranged on the valve rod, the butterfly plate comprises a mounting plate and a sealing plate, a protruding portion is arranged on one side of the mounting plate, the protruding portion is fixedly connected with the valve rod through a bolt, and the sealing plate is fixedly connected with the valve seat. A sealing plate is arranged on one side of the mounting plate, a positioning boss penetrating through the sealing plate is arranged on the other side of the mounting plate, a plurality of sliding rods are arranged in the positioning boss in a sliding mode, inserting holes matched with the sliding rods are formed in the sealing plate, and adjusting pieces used for controlling the relative positions of the sliding rods are arranged in the positioning boss. And the sealing plate and the mounting plate are quickly disassembled and assembled through the adjusting piece and the sliding rod, so that the sealing plate can be conveniently replaced after being abraded.

Description

Technical Field

[0001] The utility model discloses a butterfly valve which is easy to maintain and belongs to the technical field of valves. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve that mainly cuts off and throttles the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening, closing or regulating. During the opening and closing process of the butterfly valve, the rotation of the butterfly plate will cause friction with the valve seat. After a period of use, the butterfly plate will be worn, which will affect the sealing performance of the butterfly plate and the valve seat when the valve is closed. Therefore, the butterfly plate needs to be replaced regularly. The existing butterfly plate is fixedly connected to the valve stem by bolts, but since the actual sealing position of the butterfly plate is not large, the method of fixedly connecting the butterfly plate and the valve stem is not conducive to replacing the butterfly plate, making the overall maintenance difficult. Utility Model Content

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a butterfly valve which is easy to maintain.

[0004] The utility model achieves the above-mentioned purpose through the following technical scheme: a butterfly valve with easy maintenance, including a valve seat, a butterfly plate and a valve stem, the butterfly plate is located on the inner side of the valve seat, the valve stem is connected with the butterfly plate after passing through the valve seat, and a hand wheel is arranged on the valve stem, the butterfly plate includes a mounting plate and a sealing plate, a protrusion is arranged on one side of the mounting plate, the protrusion is fixedly connected to the valve stem through bolts, a positioning boss passing through the sealing plate is arranged on the other side of the mounting plate, a plurality of sliding rods are slidably arranged in the positioning boss, a socket matching the sliding rod is arranged on the sealing plate, and an adjusting member for controlling the relative position of the sliding rod is arranged in the positioning boss.

[0005] Preferably, the adjusting member includes a rotating block, a circular groove is provided in the positioning boss, the rotating block is rotatably installed in the circular groove, and the rotating block has four pressing sections and notch sections, the sliding rod is symmetrically provided with four pressing sections and notch sections are arranged at intervals, the notch sections and the pressing sections have transition slopes, a mounting hole is provided in the positioning boss, the sliding rod is slidably provided in the mounting hole, and a first spring is sleeved on the outer side of the sliding rod, the first spring applies a force to the sliding rod that resists the rotating block.

[0006] Preferably, a cover plate for covering the rotating block is provided on the positioning boss, a boss penetrating the cover plate is provided on the rotating block, a knob groove is provided on the boss, and the cover plate is fixedly connected to the positioning boss by bolts.

[0007] Preferably, one end of the sliding rod that cooperates with the socket has a chamfer.

[0008] Preferably, a recessed groove is provided on the mounting plate, a second spring is provided in the recessed groove, and the second spring applies a force to the rotating block to resist the cover plate.

[0009] Preferably, a positioning pin is provided between the mounting plate and the sealing plate.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The butterfly valve is configured with a detachable sealing plate and a mounting plate, and the sealing plate can be quickly disassembled and assembled with the mounting plate through an adjusting member and a sliding rod, so that the sealing plate can be conveniently replaced after it is worn. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of a butterfly valve that is easy to maintain according to the utility model;

[0013] Figure 2 This is a cross-sectional view of a butterfly valve that is easy to maintain according to the utility model;

[0014] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0015] Figure 4 This is a schematic diagram of the structure of the valve stem and the butterfly plate in the utility model;

[0016] Figure 5 This is an exploded view of the butterfly plate in the utility model;

[0017] Figure numerals: 1. valve seat; 2. hand wheel; 3. valve stem; 4. butterfly plate; 5. mounting plate; 6. sliding rod; 7. first spring; 8. cover plate; 9. rotating block; 10. sealing plate; 11. mounting hole; 12. second spring; 13. countersunk groove; 14. knob groove; 15. adjusting member; 16. notched section; 17. circular groove; 18. pressing section; 19. positioning pin; 20. boss; 21. positioning boss. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-Figure 5As shown, a butterfly valve with easy maintenance includes a valve seat 1, a butterfly plate 4 and a valve stem 3. The butterfly plate 4 is located on the inner side of the valve seat 1. The valve stem 3 is connected to the butterfly plate 4 after passing through the valve seat 1, and a handwheel 2 is provided on the valve stem 3. The butterfly plate 4 includes a mounting plate 5 and a sealing plate 10. A protrusion is provided on one side of the mounting plate 5, and the protrusion is fixedly connected to the valve stem 3 by bolts. A positioning boss 21 passing through the sealing plate 10 is provided on the other side of the mounting plate 5. A plurality of sliding rods 6 are slidably provided in the positioning boss 21. A socket matched with the sliding rod 6 is provided on the sealing plate 10. An adjusting member 15 for controlling the relative position of the sliding rod 6 is provided in the positioning boss 21.

[0020] The adjusting member 15 includes a rotating block 9, a circular groove 17 is provided in the positioning boss 21, the rotating block 9 is rotatably installed in the circular groove 17, and the rotating block 9 has four pressing sections 18 and notch sections 16, and the sliding rod 6 is symmetrically provided with four pressing sections 18 and notch sections 16 arranged at intervals, and the notch sections 16 and the pressing sections 18 have transition slopes, and the positioning boss 21 is provided with a mounting hole 11, and the sliding rod 6 is slidably arranged in the mounting hole 11, and the outer side of the sliding rod 6 is sleeved with a first spring 7, and the first spring 7 applies a force to the sliding rod 6 to resist the rotating block 9. When the rotating block 9 is rotated, the sliding rod 6 and the rotating block 9 are rotated. The contact position of block 9 changes. When one end of the sliding rod 6 contacts the pressing section 18, one end of the sliding rod 6 extends out of the positioning boss 21 and can be inserted into the socket, so that the mounting plate 5 and the sealing plate 10 can be connected together. When the sliding rod 6 contacts the recessed section 16, the first spring 7 retracts the sliding rod 6 into the positioning boss 21, so that the sealing plate 10 can be removed from the mounting plate 5 to facilitate the replacement of the sealing plate 10 after wear. At the same time, there is a transition slope between the pressing section 18 and the recessed section 16, which can facilitate the sliding rod 6 to slide from the recessed section 16 to the pressing section 18 along the transition slope.

[0021] A cover plate 8 for covering the rotating block 9 is arranged on the positioning boss 21, a boss 20 penetrating the cover plate 8 is arranged on the rotating block 9, a knob groove 14 is arranged on the boss 20, and the cover plate 8 is fixedly connected to the positioning boss 21 by bolts. After the cover plate 8 is connected to the positioning boss 21, the rotating block 9 can be prevented from falling off the positioning boss 21, and an Allen wrench can be inserted into the knob groove 14, and then the rotating block 9 can be rotated, so that the peripheral interference position of the sliding rod 6 and the rotating block 9 changes, thereby controlling the sliding of the sliding rod 6.

[0022] One end of the sliding rod 6 that matches with the insertion hole has a chamfer, and the chamfer can facilitate the smooth insertion of one end of the sliding rod 6 into the insertion hole.

[0023] A recessed groove 13 is provided on the mounting plate 5, and a second spring 12 is provided in the recessed groove 13. The second spring 12 applies a force to the rotating block 9 to resist the cover plate 8, so that the rotating block 9 has a certain resistance when rotating, thereby preventing the rotating block 9 from rotating due to the impact of the fluid, thereby causing the sealing plate 10 to separate from the mounting plate 5.

[0024] A positioning pin 19 is provided between the mounting plate 5 and the sealing plate 10. The relative positions of the sealing plate 10 and the mounting plate 5 are first positioned using the positioning pin 19 so that the insertion hole can face the sliding rod 6, preparing for the subsequent connection of the sealing plate 10 and the mounting plate 5 together.

[0025] Working principle: when the butterfly valve needs to replace the butterfly plate 4 after being used for a period of time, insert the hexagonal wrench into the knob groove 14, and then rotate the rotating block 9 45°, so that the state in which the sliding rod 6 and the pressing section 18 are in contact with each other is changed to that in which the sliding rod 6 and the recessed section 16 are in contact, so that the sliding rod 6 is disengaged from the socket, so that the sealing plate 10 can be removed from the mounting plate 5, and the new sealing plate 10 is aligned with the latch and pressed against the side of the mounting plate 5, and then the rotating block 9 is rotated 45° again to allow the sliding rod 6 to be inserted into the socket again, so that the sealing plate 10 can be fixed on the mounting plate 5.

[0026] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0027] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A butterfly valve with easy maintenance, comprising a valve seat (1), a butterfly plate (4) and a valve stem (3), characterized in that: The butterfly plate (4) is located on the inner side of the valve seat (1), the valve stem (3) is connected to the butterfly plate (4) after passing through the valve seat (1), and a hand wheel (2) is arranged on the valve stem (3), the butterfly plate (4) comprises a mounting plate (5) and a sealing plate (10), one side of the mounting plate (5) is provided with a protrusion, the protrusion is fixedly connected to the valve stem (3) by bolts, the other side of the mounting plate (5) is provided with a positioning boss (21) passing through the sealing plate (10), a plurality of sliding rods (6) are slidably arranged in the positioning boss (21), the sealing plate (10) is provided with a socket matched with the sliding rod (6), and the positioning boss (21) has an adjusting member (15) for controlling the relative position of the sliding rod (6).

2. A butterfly valve with easy maintenance according to claim 1, characterized in that: The adjusting member (15) comprises a rotating block (9), a circular groove (17) is arranged in the positioning boss (21), the rotating block (9) is rotatably mounted in the circular groove (17), and the rotating block (9) has four pressing sections (18) and recessed sections (16), the sliding rod (6) is symmetrically arranged with four pressing sections (18) and recessed sections (16) arranged at intervals, and the recessed sections (16) and the pressing sections (18) have transition inclined surfaces, the positioning boss (21) is provided with a mounting hole (11), the sliding rod (6) is slidably arranged in the mounting hole (11), and the outer side of the sliding rod (6) is sleeved with a first spring (7), and the first spring (7) applies a force to the sliding rod (6) to resist the rotating block (9).

3. The butterfly valve with easy maintenance according to claim 2, characterized in that: The positioning boss (21) is provided with a cover plate (8) for covering the rotating block (9), the rotating block (9) is provided with a boss (20) penetrating the cover plate (8), the boss (20) is provided with a knob groove (14), and the cover plate (8) is fixedly connected to the positioning boss (21) by bolts.

4. The butterfly valve with easy maintenance according to claim 1, characterized in that: One end of the sliding rod (6) that matches the insertion hole has a chamfer.

5. The butterfly valve with easy maintenance according to claim 1, characterized in that: A recessed groove (13) is provided on the mounting plate (5), a second spring (12) is provided in the recessed groove (13), and the second spring (12) applies a force to the rotating block (9) to resist the cover plate (8).

6. The butterfly valve with easy maintenance according to claim 1, characterized in that: A positioning pin (19) is provided between the mounting plate (5) and the sealing plate (10).

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