Counterweight anti-falling device for valve clack of steam extraction check valve

Abstract

The utility model discloses a steam extraction check valve clack counter weight anti-falling device, which relates to the technical field of check valve clacks and comprises a fixing disc, a plurality of connecting holes are annularly formed in the upper end of the fixing disc at equal intervals, a valve rod is fixedly connected to the middle of the lower end of the fixing disc, a limiting disc is sleeved on the lower portion of the middle of the valve rod, and the valve rod is fixedly connected with the limiting disc. Three connecting grooves are formed in the edge of the limiting disc at equal intervals, and fixing plates are arranged on the two sides of the upper ends of the three connecting grooves correspondingly. The telescopic spring on the inner side of the balancing weight is matched with the positioning block, so that the balancing weight is conveniently installed and positioned, the use convenience of the balancing weight is improved, the balancing weight installation function is further achieved, the balancing weight is conveniently prevented from falling off through rotary connection of the movable rod and the limiting block, and the service life of the balancing weight is prolonged. The stability of the balancing weight in the using process is improved, then the anti-falling function of the balancing weight is achieved, and finally the problems that the balancing weight is inconvenient to mount and dismount and prone to falling off, and consequently the valve clack balancing weight anti-falling device is damaged are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of check valve flaps, in particular to a valve flap counterweight anti-dropping device for a steam extraction check valve. Background Art

[0002] Early steam extraction check valves may not have a special valve disc counterweight anti-dropping device, which causes the valve disc to easily fall off under certain circumstances, posing a safety hazard. With the development of industrial technology, people began to realize the problem of valve disc falling off, and gradually added counterweights and anti-dropping designs to the steam extraction check valve. In the early stage, the design of the counterweight anti-dropping device mainly focused on preventing the valve disc from falling off by increasing the counterweight of the valve disc, and the valve disc counterweight anti-dropping device of the steam extraction check valve comprises a counterweight block, an anti-dropping pin, a limit device and a valve disc, etc.; However, during use, the existing valve disc counterweight anti-dropping device of the steam extraction check valve is damaged during use due to the inconvenient installation and disassembly of the counterweight block and the easy fall-off of the counterweight block, making it difficult to repair; Therefore, the above technical problems need to be solved and processed. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a valve disc counterweight anti-dropping device for a steam extraction check valve.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a valve disc counterweight anti-detachment device for a steam extraction check valve, comprising a fixed plate, a plurality of connecting holes are equidistantly opened in a ring shape at the upper end of the fixed plate, and a valve stem is fixedly connected to the middle part of the lower end of the fixed plate, a limiting plate is sleeved on the lower middle part of the valve stem, and the valve stem and the limiting plate are fixedly connected, three connecting grooves are equidistantly opened at the edge of the limiting plate, and fixing plates are provided on both sides of the upper ends of the three connecting grooves, and the lower ends of the fixing plates are fixedly connected to the limiting plate.

[0005] Preferably, a connecting head is fixedly connected to the bottom of the lower end of the valve stem, and three arc-shaped connecting blocks are fixedly connected to the connecting head in an annular manner with equal distances, and the other sides of the arc-shaped connecting blocks are fixedly connected to the inner wall of the fixing ring.

[0006] Preferably, valve flaps are installed between the arc-shaped connection blocks, and a positioning connection cylinder is fixedly connected to the middle of the upper end of the valve flap.

[0007] Preferably, a movable rod is sleeved on the inner side of the positioning connection tube, positioning grooves are provided on both sides of the upper end of the movable rod, and a threaded hole is provided in the middle of the upper end of the movable rod.

[0008] Preferably, a counterweight block is sleeved on the outer side of the positioning groove on the movable rod, and telescopic springs are provided at both ends of the inner side of the counterweight block. One end of the telescopic spring is fixed to the inner wall of the counterweight block, and the other end is fixed to one side of the positioning block.

[0009] Preferably, a limit block is screwed into the bolt hole at the upper end of the movable rod, and the movable rod is installed on the inner side of a guide groove opened at the upper end of the guide rod. A buffer rod is installed on one side of the guide groove, and a buffer spring is sleeved between the outer side of the buffer rod and the guide groove wall.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: in the utility model, the telescopic spring on the inner side of the counterweight block cooperates with the positioning block, which facilitates the installation and positioning of the counterweight block, improves the convenience of using the counterweight block, and thus realizes the function of installing the counterweight block, and then the movable rod and the limit block are rotated and connected to prevent the counterweight block from falling off, improves the stability of the counterweight block during use, and thus realizes the function of preventing the counterweight block from falling off, and finally solves the problem of inconvenient installation and disassembly of the counterweight block and the easy falling off of the counterweight block, which leads to damage of the valve disc counterweight anti-falling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure proposed by the utility model;

[0013] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the other side proposed by the utility model;

[0014] Figure 3 This is a schematic diagram of the top view structure proposed by the utility model;

[0015] Figure 4 This is a schematic diagram of the overall structure of the counterweight anti-dropping proposed by the utility model;

[0016] Figure 5 This is a schematic diagram of the cross-sectional structure of the counterweight block proposed in the utility model.

[0017] Serial numbers in the figure: 1. fixed plate; 2. connecting hole; 3. valve stem; 4. limit plate; 5. guide rod; 6. counterweight block; 7. guide groove; 8. buffer spring; 9. buffer rod; 10. limit block; 11. movable rod; 12. valve disc; 13. fixed ring; 14. connecting block; 15. telescopic spring; 16. positioning block. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Example: See Figure 1-5 The utility model discloses a valve disc counterweight anti-drop device for a steam extraction check valve, comprising a fixed plate 1, a plurality of connection holes 2 are equidistantly provided in an annular manner on the upper end of the fixed plate 1, a valve stem 3 is fixedly connected to the middle of the lower end of the fixed plate 1, a limit plate 4 is sleeved on the lower middle of the valve stem 3, and the valve stem 3 is fixedly connected to the limit plate 4, three connection grooves are equidistantly provided on the edge of the limit plate 4, both sides of the upper ends of the three connection grooves are provided with fixed plates, the lower ends of the fixed plates are fixedly connected to the limit plate 4, and the guide rod 5 is conveniently moved through the connection grooves on the limit plate 4 and the fixed plates. The valve stem 3 is installed and fixed; a connecting head is fixed to the bottom of the lower end of the valve stem 3, and three arc-shaped connecting blocks 14 are fixed to the connecting head at equal distances in a ring shape. The other sides of the arc-shaped connecting blocks 14 are fixed to the inner wall of the fixing ring 13, and the position of the valve flap 12 is convenient to determine through the three arc-shaped connecting blocks 14 fixed at equal distances on the connecting head; valve flaps 12 are installed between the arc-shaped connecting blocks 14, and a positioning connecting cylinder is fixed to the middle part of the upper end of the valve flap 12, and the valve flap 12 and the positioning connecting cylinder are convenient to control the opening size of the valve flap 12 and to carry out weight balancing.

[0020] In the utility model, a movable rod 11 is sleeved on the inner side of the positioning connection cylinder, and positioning grooves are provided on both sides of the upper end of the movable rod 11, and a threaded hole is provided in the middle part of the upper end of the movable rod 11. The positioning groove on the movable rod 11 is convenient for preventing the counterweight 6 from rotating and moving; a counterweight 6 is sleeved on the outer side of the positioning groove on the movable rod 11, and telescopic springs 15 are provided at both ends of the inner side of the counterweight 6, one end of the telescopic spring 15 is fixedly connected to the inner wall of the counterweight 6, and the other end is fixedly connected to one side of the positioning block 16. The counterweight 6 is conveniently fixed to the movable rod 11 through the telescopic spring 15 and the positioning block 16; the limited block 10 is screwed into the bolt hole at the upper end of the movable rod 11, and the movable rod 11 is installed on the inner side of the guide groove 7 provided at the upper end of the guide rod 5, and a buffer rod 9 is installed on one side of the guide groove 7, and a buffer spring 8 is sleeved between the outer side of the buffer rod 9 and the wall of the guide groove 7, and then the buffer spring 8 and the buffer spring 8 are convenient for preventing the valve flap 12 from being damaged due to excessive opening speed.

[0021] Working principle: When the utility model is used, first, the check valve is connected and fixed through the connecting hole 2 on the fixed disk 1, and then the valve stem 3 and the limit disk 4 are used to make the valve disc move within a certain range, and then the guide rod 5 on the limit disk 4 is used to determine the position of the valve disc, and then the valve disc 12 is moved upward to lift the movable rod 11, so that the movable rod 11 moves inside the guide groove 7, and then the position of the valve disc 12 is fixed through the fixing ring 13 and the connecting block 14, and then the valve disc 12 is counterweighted through the counterweight block 6 and the limit block 10, and the counterweight block 6 is prevented from falling off, and then the telescopic spring 15 and the positioning block 16 are used to fix the counterweight block 6 firmly on the movable rod 11, and then the buffer rod 9 and the buffer spring 8 are used to prevent the valve disc 12 from being damaged due to excessive pressure.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve disc counterweight anti-drop device for a steam extraction check valve, comprising a fixed plate (1), characterized in that: The upper end of the fixed disk (1) is provided with a plurality of connection holes (2) at equal intervals in an annular manner, and a valve stem (3) is fixedly connected to the middle of the lower end of the fixed disk (1). A limit disk (4) is sleeved on the lower middle part of the valve stem (3), and the valve stem (3) and the limit disk (4) are fixedly connected. Three connection grooves are formed at equal intervals at the edge of the limit disk (4), and both sides of the upper ends of the three connection grooves are provided with fixing plates, and the lower ends of the fixing plates are fixedly connected to the limit disk (4); A connecting head is fixedly connected to the bottom of the lower end of the valve stem (3), and three arc-shaped connecting blocks (14) are fixedly connected to the connecting head at equal intervals in an annular manner; Valve flaps (12) are installed between the arc-shaped connection blocks (14), and the middle part of the upper end of the valve flaps (12) is fixedly connected with a positioning connection cylinder; A movable rod (11) is sleeved on the inner side of the positioning connection cylinder, and positioning grooves are provided on both sides of the upper end of the movable rod (11); A counterweight block (6) is sleeved on the outer side of the positioning groove on the movable rod (11), and telescopic springs (15) are provided at both ends of the inner side of the counterweight block (6), one end of the telescopic spring (15) is fixedly connected to the inner wall of the counterweight block (6), and the other end is fixedly connected to one side of the positioning block (16); The limit block (10) is screwed into the bolt hole at the upper end of the movable rod (11).

2. The device for preventing valve disc counterweight from falling off of a steam extraction check valve according to claim 1, characterized in that: The other side of the arc-shaped connecting block (14) is fixedly connected to the inner wall of the fixing ring (13).

3. The device for preventing valve disc counterweight from falling off of a steam extraction check valve according to claim 1, characterized in that: A threaded hole is provided in the middle of the upper end of the movable rod (11).

4. The device for preventing valve flap counterweight from falling off of a steam extraction check valve according to claim 3, characterized in that: The movable rod (11) is mounted on the inner side of a guide groove (7) formed at the upper end of the guide rod (5); a buffer rod (9) is mounted on one side of the guide groove (7); and a buffer spring (8) is sleeved between the outer side of the buffer rod (9) and the wall of the guide groove (7).

Images