High-wear-resistance powder metallurgy valve seat

Abstract

The utility model discloses a highly wear-resistant powder metallurgy valve seat, which particularly relates to the technical field of valve seats and comprises a vacuum pump body, a valve seat body is arranged above the vacuum pump body, the bottom of the valve seat body is communicated with a connecting pipe, the connecting pipe is connected with the top of the vacuum pump body in a clamping manner, and the bottoms of two sides of the connecting pipe are fixedly connected with fixing blocks. Fixing mechanisms used for disassembling and assembling the valve seat body are arranged in the two fixing blocks, and locking mechanisms used for limiting the fixing mechanisms are arranged above the two fixing blocks. The valve seat has the technical effects and advantages that the valve seat body is convenient to disassemble and assemble by arranging the fixing mechanisms, and the convenience of later replacement of the valve seat body is improved; and by arranging the locking mechanism, the fixing mechanism can be conveniently locked, and the situation that the mounting stability of the valve seat body is affected due to misoperation of the fixing mechanism is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valve seats, and more specifically to a high-wear-resistant powder metallurgy valve seat. Background Art

[0002] In the field of powder metallurgy technology, valve seats are an indispensable component.

[0003] For example, the oil-free vertical vacuum pump integrally replaceable valve seat of patent No. 202320568221.3 includes a vertical vacuum pump body, a connecting pipe is clamped on the top of the vertical vacuum pump body, the top of the connecting pipe is connected to a replacement valve seat, the interior of the connecting pipe is fixedly connected to an extension pipe, the bottom of the extension pipe penetrates into the interior of the vertical vacuum pump body, the surface of the extension pipe is fixedly connected to a sealing gasket, both sides of the connecting pipe are fixedly connected to a transmission box, a rotating block is provided on the top of the transmission box, the bottom of the rotating block is fixedly connected to a rotating rod, the surface of the rotating rod is movably connected to the top of the inner wall of the transmission box through a bearing, and the bottom of the rotating rod is fixedly connected to a first bevel gear. The utility model increases the functionality of facilitating quick replacement of the valve seat, so that it has the effect of replacing the valve seat as a whole, and prevents the occurrence of cumbersome, time-consuming and labor-intensive situations when replacing the valve seat as a whole.

[0004] Although this valve seat solves the problem of time-consuming and labor-intensive replacement, each time the valve seat is replaced, it is necessary to first pull the clamping rod out of the rotating block and then rotate the rotating block to remove the valve seat. This process is not only cumbersome, but the plug rod is easily dislodged by external forces during the use of the valve seat, causing the rotating block to rotate incorrectly, affecting the stability of the valve seat installation. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a highly wear-resistant powder metallurgy valve seat to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including: a vacuum pump body, a valve seat body is arranged above the vacuum pump body, a connecting pipe is connected to the bottom of the valve seat body, the connecting pipe is clamped and connected to the top of the vacuum pump body, the bottom of both sides of the connecting pipe are fixedly connected with fixing blocks, the two fixing blocks are each provided with a fixing mechanism for disassembling and assembling the valve seat body, and a locking mechanism for limiting the fixing mechanism is arranged above the two fixing blocks.

[0007] In a preferred embodiment, the fixing mechanism includes a driving groove opened on one side of the fixed block, a plug rod is slidably connected in the driving groove, a plug hole is opened on one side of the vacuum pump body at a position relative to the plug rod, one end of the plug rod is plugged into the plug hole, a trapezoidal opening is opened through the top surface of the plug rod, a receiving groove is opened on the top surface of the driving groove at a position relative to the trapezoidal opening, a trapezoidal block is slidably connected in the receiving groove, the inclined surface on one side of the trapezoidal block is slidably connected to the inclined surface in the trapezoidal opening, a pressure rod is vertically fixedly connected to the top surface of the trapezoidal block, the top end of the pressure rod passes through the fixed block and extends to above the fixed block, the top end of the pressure rod is fixedly connected to a pressure plate, and two springs are fixedly connected to one end of the plug rod away from the plug hole.

[0008] In a preferred embodiment, an extension groove is formed on the inner bottom surface of the driving groove below the trapezoidal block, and the side wall of the trapezoidal block is slidably connected to the inner side wall of the extension groove.

[0009] In a preferred embodiment, a limit rod is provided in each of the two springs, one end of the two limit rods is fixedly connected to the side wall of the insertion rod, and a limit hole is provided on the inner side wall of the driving groove at the relative position of the two limit rods, and one end of the two limit rods is plugged into the corresponding limit hole.

[0010] In a preferred embodiment, a valve seat cushion is mounted on the valve seat body, and a wear-resistant layer is fixedly connected to the surface of the valve seat cushion.

[0011] In a preferred embodiment, the locking mechanism includes a U-shaped fixing plate fixedly connected to the surface of the fixing block, the pressure plate is located in the U-shaped fixing plate, both ends of the bottom surface of the pressure plate are slidably connected with arc-shaped pads, the bottom surfaces of the two arc-shaped pads are slidably connected to the top surface of the fixing block, one side of the two arc-shaped pads is fixedly connected to a driving plate, and the two driving plates are horizontally threaded with a bidirectional screw, one end of the bidirectional screw is rotatably connected to the inner side wall of the U-shaped fixing plate, and the other end of the bidirectional screw penetrates the side wall of the U-shaped fixing plate and extends to one side of the U-shaped fixing plate.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The fixing mechanism is provided to facilitate the disassembly and assembly of the valve seat body, thereby improving the convenience of its later replacement;

[0014] 2. By setting a locking mechanism, it is convenient to lock the fixing mechanism to avoid misoperation and affect the stability of the valve seat body installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front cutaway structural schematic diagram of the utility model.

[0016] Figure 2It is a schematic diagram of the pressure plate connection structure of the utility model.

[0017] Figure 3 It is a schematic diagram of the pressure rod connection structure of the utility model.

[0018] Figure 4 For the utility model Figure 1 Enlarged structural diagram at A in the middle.

[0019] The accompanying drawings are marked as follows: 1. vacuum pump body; 2. valve seat body; 3. connecting pipe; 4. fixing block; 5. fixing mechanism; 6. locking mechanism; 7. driving groove; 8. plug rod; 9. plug hole; 10. trapezoidal opening; 11. storage groove; 12. trapezoidal block; 13. pressure rod; 14. pressure plate; 15. extension groove; 16. spring; 17. limit rod; 18. limit hole; 19. valve seat cushion; 20. wear-resistant layer; 21. arc-shaped cushion block; 22. driving plate; 23. bidirectional screw; 24. U-shaped fixing plate. DETAILED DESCRIPTION

[0020] 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.

[0021] As attached Figure 1-4 A highly wear-resistant powder metallurgy valve seat shown includes: a vacuum pump body 1, a valve seat body 2 arranged above the vacuum pump body 1, a connecting pipe 3 is connected to the bottom of the valve seat body 2, the connecting pipe 3 is clamped and connected to the top of the vacuum pump body 1, two fixing blocks 4 are fixedly connected to the bottom of both sides of the connecting pipe 3, and the two fixing blocks 4 are each provided with a fixing mechanism 5 for disassembling and assembling the valve seat body 2, and a locking mechanism 6 for limiting the fixing mechanism 5 is provided above the two fixing blocks 4.

[0022] The fixing mechanism 5 includes a driving groove 7 opened on one side of the fixing block 4, a plug rod 8 is slidably connected to the driving groove 7, a socket 9 is opened on one side of the vacuum pump body 1 and is located at a position relative to the plug rod 8, one end of the plug rod 8 is plugged and connected with the socket 9, a trapezoidal opening 10 passes through and is opened on the top surface of the plug rod 8, a receiving groove 11 is opened on the top surface of the driving groove 7 and is located at a position relative to the trapezoidal opening 10, a trapezoidal block 12 is slidably connected in the receiving groove 11, an inclined surface on one side of the trapezoidal block 12 is slidably connected with the inclined surface in the trapezoidal opening 10, a pressure rod 13 is vertically fixedly connected to the top surface of the trapezoidal block 12, a top end of the pressure rod 13 passes through the fixing block 4 and extends above the fixing block 4, a pressure plate 14 is fixedly connected to the top end of the pressure rod 13, two springs 16 are fixedly connected to one end of the plug rod 8 away from the socket 9, by pressing the pressure plate 14, it is convenient to make the plug rod 8 slide horizontally and one end of it is pulled out from the socket 9, so as to facilitate the disassembly and assembly of the valve seat body 2.

[0023] The extension groove 15 is formed on the inner bottom surface of the driving groove 7 and is located below the trapezoidal block 12 . The side wall of the trapezoidal block 12 is slidably connected to the inner wall of the extension groove 15 . The extension groove 15 is used to easily store the trapezoidal block 12 moving downward.

[0024] The two limit rods 17 are respectively arranged in the two springs 16, one end of the two limit rods 17 is fixedly connected to the side wall of the insertion rod 8, two limit holes 18 are opened on the inner wall of the driving groove 7 at the relative positions of the two limit rods 17, and one end of the two limit rods 17 is plugged and connected with the corresponding limit holes 18. By plugging the limit rods 17 and the limit holes 18, the stability of the horizontal movement of the insertion rod 8 is improved.

[0025] A valve seat cushion 19 is mounted on the valve seat body 2 , and a wear-resistant layer 20 is fixedly connected to the surface of the valve seat cushion 19 . The wear-resistant layer 20 can improve the wear resistance of the valve seat cushion 19 and increase the service life of the valve seat body 2 .

[0026] The specific implementation method is as follows: by providing the fixing mechanism 5, it is convenient to disassemble and assemble the valve seat body 2, thereby improving the convenience of its later replacement.

[0027] As attached Figure 1-4A high wear-resistant powder metallurgy valve seat shown in the figure, the locking mechanism 6 includes a U-shaped fixing plate 24 fixedly connected to the surface of the fixing block 4, the pressure plate 14 is located in the U-shaped fixing plate 24, two arc-shaped pads 21 are slidably connected to the two ends of the bottom surface of the pressure plate 14, the bottom surfaces of the two arc-shaped pads 21 are slidably connected to the top surface of the fixing block 4, the two driving plates 22 are respectively fixedly connected to one side of the two arc-shaped pads 21, a bidirectional screw 23 is horizontally penetrated and threadedly connected to the two driving plates 22, one end of the bidirectional screw 23 is rotatably connected to the inner wall of the U-shaped fixing plate 24, and the other end of the bidirectional screw 23 penetrates the side wall of the U-shaped fixing plate 24 and extends to one side of the U-shaped fixing plate 24, the horizontal position of the two arc-shaped pads 21 is adjusted by rotating the bidirectional screw 23, so as to limit the position of the pressure plate 14 and improve the stability of the valve seat body 2 after installation.

[0028] The specific implementation method is as follows: by providing a locking mechanism 6, it is convenient to lock the fixing mechanism 5, so as to avoid misoperation thereof and affect the stability of the installation of the valve seat body 2.

[0029] The working principle of the utility model is as follows: when in use, when the valve seat body 2 needs to be replaced, the two-way screw 23 is first rotated to make the two driving plates 22 drive the two arc-shaped pads 21 to move away from each other until they are out of the bottom of the pressure plate 14, and then the pressure plate 14 is pressed, and the trapezoidal block 12 is driven down by the pressure rod 13 to make the inclined surface on one side of the trapezoidal block 12 slide and connect with the inclined surface on one side of the trapezoidal opening 10. At this time, the insertion rod 8 slides to one side, so that one end of it is pulled out from the insertion hole 9, and then the valve seat body 2 can be removed from the vacuum pump body 1. After the valve seat body 2 is replaced and installed, the two-way screw 23 is rotated in the opposite direction, so that the two driving plates 22 drive the two arc-shaped pads 21 to move to the bottom of the pressure plate 14, so as to support the pressure plate 14 and prevent it from moving downward to affect the stability of the installation of the valve seat body 2. The wear-resistant layer 20 on the surface of the valve seat cushion 19 is convenient to improve the wear resistance of the surface of the valve seat cushion 19, thereby greatly improving the service life of the valve seat body 2.

[0030] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0031] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A highly wear-resistant powder metallurgy valve seat, comprising: A vacuum pump body (1), characterized in that: a valve seat body (2) is provided above the vacuum pump body (1), a connecting pipe (3) is connected to the bottom of the valve seat body (2), the connecting pipe (3) is connected to the top of the vacuum pump body (1) by snap-fitting, the bottoms of both sides of the connecting pipe (3) are fixedly connected to fixing blocks (4), the two fixing blocks (4) are each provided with a fixing mechanism (5) for disassembling and assembling the valve seat body (2), and a locking mechanism (6) for limiting the fixing mechanism (5) is provided above the two fixing blocks (4).

2. The highly wear-resistant powder metallurgy valve seat according to claim 1, characterized in that: The fixing mechanism (5) comprises a driving groove (7) provided on one side of the fixing block (4), a plug rod (8) being slidably connected in the driving groove (7), a plug hole (9) being provided on one side of the vacuum pump body (1) at a position opposite to the plug rod (8), one end of the plug rod (8) being plug-connected to the plug hole (9), a trapezoidal opening (10) being provided through the top surface of the plug rod (8), and a receiving groove (11) being provided on the top surface of the driving groove (7) at a position opposite to the trapezoidal opening (10). A trapezoidal block (12) is slidably connected in the receiving groove (11); an inclined surface on one side of the trapezoidal block (12) is slidably connected to an inclined surface in the trapezoidal opening (10); a pressure rod (13) is vertically fixedly connected to the top surface of the trapezoidal block (12); the top end of the pressure rod (13) passes through the fixed block (4) and extends to the top of the fixed block (4); a pressure plate (14) is fixedly connected to the top end of the pressure rod (13); and two springs (16) are fixedly connected to one end of the insertion rod (8) away from the insertion hole (9).

3. The highly wear-resistant powder metallurgy valve seat according to claim 2, characterized in that: An extension groove (15) is provided on the inner bottom surface of the driving groove (7) below the trapezoidal block (12), and the side wall of the trapezoidal block (12) is slidably connected to the inner side wall of the extension groove (15).

4. The highly wear-resistant powder metallurgy valve seat according to claim 2, characterized in that: A limiting rod (17) is provided in each of the two springs (16), one end of each of the limiting rods (17) is fixedly connected to the side wall of the insertion rod (8), and a limiting hole (18) is provided on the inner side wall of the driving groove (7) at a position relative to the two limiting rods (17), and one end of each of the limiting rods (17) is plugged into and connected to the corresponding limiting hole (18).

5. The highly wear-resistant powder metallurgy valve seat according to claim 1, characterized in that: A valve seat cushion (19) is mounted on the valve seat body (2), and a wear-resistant layer (20) is fixedly connected to the surface of the valve seat cushion (19).

6. The highly wear-resistant powder metallurgy valve seat according to claim 2, characterized in that: The locking mechanism (6) comprises a U-shaped fixing plate (24) fixedly connected to the surface of the fixing block (4), the pressure plate (14) is located in the U-shaped fixing plate (24), both ends of the bottom surface of the pressure plate (14) are slidably connected with arc-shaped pads (21), the bottom surfaces of the two arc-shaped pads (21) are slidably connected to the top surface of the fixing block (4), one side of the two arc-shaped pads (21) is fixedly connected with a driving plate (22), and the two driving plates (22) are horizontally threaded with bidirectional screws (23), one end of the bidirectional screw (23) is rotatably connected to the inner side wall of the U-shaped fixing plate (24), and the other end of the bidirectional screw (23) penetrates the side wall of the U-shaped fixing plate (24) and extends to one side of the U-shaped fixing plate (24).

Images