Valve element assembly and forged steel stop valve

Abstract

The utility model discloses a valve element assembly and a forged steel stop valve, and relates to the technical field of stop valves. The connecting block is connected to the lower end of the valve rod; the connecting seat is slidably connected to the outer side of the connecting block, and the valve rod and the connecting block can rotate in the connecting seat; the limiting sliding rods are symmetrically connected to the two sides of the connecting base; the valve core is connected with the connecting seat through an elastic component; the forged steel stop valve comprises a valve element assembly. A valve body; the valve cover is installed on the valve body, and the valve element assembly can be connected with the valve body in a sealed mode; the hand wheel is connected to the first polished rod part, and a hexagon nut capable of abutting against the hand wheel is installed on the locking rod part. The sealing structure is convenient to disassemble and good in sealing effect.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of stop valves, in particular to a valve core assembly and a forged steel stop valve. BACKGROUND

[0002] A stop valve is a kind of valve for cutting off, which realizes the cutting off function by vertically moving the valve core along the center line of the valve seat through the valve rod, so that the sealing of the valve body is realized by the valve core moving downward and pressing on the valve body. However, the sealing position of the valve core for the valve body is worn after long-term use, which makes the sealing effect of the valve core worse.

[0003] Therefore, it is necessary to improve the valve core assembly. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the application provides a valve core assembly and a forged steel stop valve to solve the technical problem that the sealing position of the valve core for the valve body is worn after long-term use, which makes the sealing effect of the valve core worse.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A valve core assembly comprises:

[0007] A valve rod;

[0008] A connecting block connected to the lower end of the valve rod;

[0009] A connecting seat slidably connected to the outer side of the connecting block, and the valve rod and the connecting block can rotate in the connecting seat;

[0010] A pair of limiting sliding rods symmetrically connected to the two sides of the connecting seat;

[0011] A valve core connected to the connecting seat through an elastic assembly.

[0012] Further, the elastic assembly comprises:

[0013] A connecting pin connected to the lower end of the connecting seat, and the connecting pin is slidably matched with the valve core;

[0014] A compression spring connected between the connecting seat and the valve core.

[0015] Still further, a groove and a pair of strip-shaped holes are formed in the valve core, the compression spring is connected between the connecting seat and the groove, a pair of strip-shaped holes are symmetrically formed in the inner wall of the groove, the connecting pin transversely penetrates the pair of strip-shaped holes, and the connecting pin is slidably matched with the pair of strip-shaped holes.

[0016] Further, the outer wall of the lower end of the valve core is provided with a plurality of sealing protrusions.

[0017] Further, a plurality of guide pins are installed in the connecting seat, and an annular guide groove is formed on the outer side of the connecting block to slidably cooperate with the guide pins.

[0018] Further, the valve rod comprises a locking rod portion, a first light rod portion, a driving screw portion and a second light rod portion connected in sequence, and the second light rod portion is connected with the connecting block.

[0019] Further, the connecting block and the second light rod portion are connected by bolts and locked by butterfly nuts.

[0020] A forged steel stop valve comprises a valve core assembly, and further comprises:

[0021] A valve body, the valve core assembly is sealably connected with the valve body;

[0022] A valve cover installed on the valve body;

[0023] A hand wheel connected with the first light rod portion, and a hexagonal nut is installed on the locking rod portion to abut against the hand wheel.

[0024] Further, a sealing seat is installed in the valve body, a sealing gasket plate is connected to the bottom of the sealing seat, the sealing protrusions abut against the sealing surface of the sealing seat, and an O-shaped sealing ring is further arranged between the sealing seat and the valve body.

[0025] Further, the valve cover is threadedly connected with the driving screw portion, sealing packing is filled between the valve cover and the driving screw portion, a packing gland is arranged on the driving screw portion to block the sealing packing, and a packing pressing plate is arranged on the valve cover to fix the packing gland.

[0026] From the above technical solution, the advantages of the present application are:

[0027] 1. In the present application, the valve core is connected with the lower end of the valve rod through an elastic assembly, so that the elastic effect of the elastic assembly can drive the valve core to abut against the valve body at all times even if the valve core is worn, thereby ensuring the sealing effect of the valve body at all times.

[0028] 2. In the present application, the lower end of the valve rod is connected with the connecting block through bolts, and the connecting block is accommodated in the connecting seat, so that the valve rod and the connecting seat are very convenient to disassemble, and the subsequent maintenance and replacement of the valve rod are more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application illustrate embodiments of the application and to explain them without imposing on the application undue limitations.

[0030] Figure 1 is a structural schematic view of the valve core assembly of the present application.

[0031] Figure 2 is a partial enlarged view of the lower part of Figure 1 .

[0032] Figure 3 is a partial enlarged view of A of Figure 2 .

[0033] Figure 4 is a partial sectional view of the lower part of Figure 1 .

[0034] Figure 5 is a partial enlarged view of B of Figure 4 .

[0035] Figure 6 is a structural schematic view of the forged steel stop valve of the present application.

[0036] Figure 7 is a partial enlarged view of C of Figure 6 .

[0037] BRIEF DESCRIPTION OF THE DRAWINGS 1 - locking rod part; 2 - first light rod part; 3 - drive screw part; 4 - second light rod part; 41 - bolt; 42 - wing nut; 5 - connecting seat; 51 - guide pin shaft; 52 - mounting hole; 53 - side window; 6 - limiting slide rod; 7 - connecting block; 71 - mounting groove; 72 - annular guide groove; 8 - valve core; 81 - groove; 82 - strip hole; 83 - sealing convex rib; 84 - compression spring; 9 - connecting pin; 10 - valve body; 101 - O-shaped sealing ring; 102 - groove; 103 - sealing groove; 20 - valve cover; 21 - valve rod nut; 30 - hand wheel; 40 - hexagonal nut; 50 - packing pressing plate; 60 - packing gland; 70 - sealing packing; 80 - limiting slide rail; 90 - sealing seat; 901 - sealing pad plate; 902 - screw; 903 - sealing surface. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with embodiments and drawings. Herein, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but not as limitations on the present application.

[0039] Reference Figures 1 to 5 , for example, Figure 1 , Figure 2 and Figure 5As shown, the embodiment provides a valve core assembly, which comprises a valve rod, a connecting block 7, a connecting seat 5, a pair of limiting slide rods 6 and a valve core 8. The valve rod comprises a locking rod portion 1, a first light rod portion 2, a driving screw portion 3 and a second light rod portion 4 connected in sequence from top to bottom. The connecting block 7 is provided with a mounting groove 71. The lower end of the second light rod portion 4 is connected in the mounting groove 71 through a bolt 41. The front part of the bolt 41 extends out of the connecting block 7 and is connected with a wing nut 42. The wing nut 42 is tightened to fix the second light rod portion 4 and the connecting block 7 together through the bolt 41. The bolt 41 and the connecting block 7 are locked through the wing nut 42 to enable the valve rod as a whole to drive the connecting block 7 to move synchronously. The connecting seat 5 is slidably connected to the outer side of the connecting block 7. The valve rod and the connecting block 7 can rotate in the connecting seat 5. The connecting block 7 can drive the connecting seat 5 to move up and down when the connecting block 7 moves up and down. The pair of limiting slide rods 6 are symmetrically connected to the two sides of the connecting seat 5. The valve core 8 is connected with the connecting seat 5 through an elastic assembly.

[0040] As shown in Figure 2 , Figure 3 and Figure 5 , the front end of the bolt 41 extends to the front side of the connecting block 7 after passing through the connecting block 7 and the second light rod portion 4, and is locked through the wing nut 42. The wing nut 42 is exposed outside the connecting seat 5, so that it is more convenient to disassemble the valve rod by operating the wing nut 42. The connecting seat 5 is provided with a pair of side windows 53 symmetrically arranged front and back. The pair of side windows 53 are in communication with the inner cavity of the connecting seat 5. The pair of side windows 53 are arranged to facilitate the installation and disassembly of the bolt 41 and the wing nut 42.

[0041] As shown in Figure 4 , the elastic assembly comprises a connecting pin 9 and a compression spring 84. The connecting pin 9 is transversely connected to the upper end of the valve core 8. The connecting pin 9 can slide on the valve core 8 when the connecting seat 5 moves up and down in the valve core 8. The compression spring 84 is connected between the connecting seat 5 and the valve core 8.

[0042] Preferably, the valve core 8 is provided with a groove 81 and a pair of strip-shaped holes 82. The pair of strip-shaped holes 82 are symmetrically arranged on the inner wall of the groove 81. The compression spring 84 is contained in the groove 81. The compression spring 84 is connected between the connecting seat 5 and the bottom of the groove 81. The connecting pin 9 transversely passes through the pair of strip-shaped holes 82 and is in sliding fit with the pair of strip-shaped holes 82. The connecting pin 9 can slide up and down in the pair of strip-shaped holes 82 when the connecting seat 5 moves up and down under the driving of the valve rod.

[0043] Preferably, the outer wall of the lower end of the valve core 8 is provided with a plurality of sealing ribs 83 in annular structure.

[0044] As shown in Figure 4 and Figure 5As shown, the connecting seat 5 is provided with a plurality of mounting holes 52, the plurality of mounting holes 52 are uniformly distributed on the connecting seat 5, the mounting holes 52 are at least two, the two mounting holes 52 are symmetrically arranged on the connecting seat 5, a guide pin shaft 51 is mounted on the mounting hole 52, the guide pin shaft 51 is in transition fit with the mounting hole 52, a threaded hole is arranged on the middle part of the outer end of the guide pin shaft 51, the threaded hole is convenient for dismounting the guide pin shaft 51, an annular guide groove 72 capable of sliding fit with the inner end of the guide pin shaft 51 is arranged on the outer side of the connecting block 7. When the second light rod part 4 moves, the connecting block 7 can drive the guide pin shaft 51 to move, and the guide pin shaft 51 drives the connecting seat 5 to move.

[0045] Reference Figures 6 to 7 As Figure 6 shown, the embodiment also provides a forged steel stop valve, which comprises a valve core assembly, a valve body 10, a valve cover 20 and a hand wheel 30, the valve cover 20 is installed on the valve body 10, the bottom of the valve core 8 abuts in the groove 102 arranged in the valve body 10; the hand wheel 30 is connected to the first light rod part 2, a hexagonal nut 40 is threadedly connected to the locking rod part 1, the hexagonal nut 40 abuts on the hand wheel 30, and the drive screw part 3 is threadedly connected to the valve rod nut 21 of the valve cover 20.

[0046] In an embodiment, as Figure 7 shown, a sealing seat 90 is mounted in the groove 102 through a screw 902, the bottom of the sealing seat 90 is connected with a sealing gasket plate 901, the sealing gasket plate 901 abuts on the bottom surface of the groove 102, the sealing convex rib 83 abuts on the sealing surface 903 of the sealing seat 90, in addition, a sealing groove 103 is arranged on the side surface of the groove 102, an O-shaped sealing ring 101 is mounted in the sealing groove 103, and the O-shaped sealing ring 101 can abut on the outer wall of the sealing seat 90. Therefore, through the sealing cooperation of the sealing seat 90, the O-shaped sealing ring 101 and the sealing gasket plate 901, the groove 102 and the sealing seat 90 can be reliably sealed. The sealing convex rib 83 abuts on the sealing surface 903 of the sealing seat 90, so that the valve body 10 and the valve core 8 are fully sealed.

[0047] Preferably, the sealing convex rib 83 is made of rubber material, and the sealing convex rib 83 is embedded in the annular groove of the arc-shaped outer circumferential surface of the lower end of the valve core 8.

[0048] In the embodiment, the valve cover 20 is threadedly connected with the drive screw part 3, the sealing filler 70 is filled between the valve cover 20 and the second light rod part 4, the filler gland 60 for plugging the sealing filler 70 is sleeved on the second light rod part 4, the filler gland 60 is in sliding fit with the second light rod part 4, and the filler pressing plate 50 for fixing the filler gland 60 through abutting action is arranged on the valve cover 20, so that the valve rod and the valve cover 20 are reliably sealed.

[0049] A pair of limiting slide rails 80 are arranged in the valve body 10, and the front end of the limiting slide rod 6 is provided with a sliding groove which is in sliding fit with the corresponding limiting slide rail 80, so that the valve core 8 is more stable when moving downward.

[0050] In the embodiment of the application, the valve body 10 is made of forged steel material, and has the characteristics of good corrosion resistance and long service life.

[0051] Working principle: by rotating the hand wheel 30, the valve rod is spirally moved downward as a whole, so that the connecting block 7 rotates in the connecting seat 5 while driving the connecting seat 5 to move downward, so that the connecting pin 9 drives the valve core 8 to move downward, and finally the valve core 8 is abutted on the sealing seat 90. Since the connecting pin 9 always abuts against the compression spring 84, even if the connecting part of the valve core 8 and the sealing seat 90 is worn, the elastic action of the compression spring 84 can also make the valve core 8 move downward, so that the valve core 8 is always abutted on the sealing surface 903, so that the valve core 8 and the valve body 10 are always in good sealing state.

[0052] In summary, the application can fully guarantee the sealing effect between the valve core 8 and the valve body 10, so that the sealing effect is good, in addition, the valve rod is indirectly connected with the valve core 8 through the bolt 41, so that the disassembly and installation between the two are more convenient.

[0053] The above only describes the preferred embodiments of the application and is not used to limit the application. For those skilled in the art, the embodiments of the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A valve trim assembly characterized by, It includes: Valve stem; The connecting block (7) connected to the lower end of the valve stem; The connecting seat (5) is slidably connected to the outer side of the connecting block (7), and the valve stem and the connecting block (7) can rotate in the connecting seat (5); A pair of limit sliding rods (6) are symmetrically connected to the two sides of the connecting seat (5); The valve core (8) is connected to the connecting seat (5) through the elastic assembly.

2. The valve trim assembly of claim 1, wherein, The elastic assembly includes: The connecting pin (9) connected to the lower end of the connecting seat (5) is in sliding fit with the valve core (8); The compression spring (84) is connected between the connecting seat (5) and the valve core (8).

3. The valve trim assembly of claim 2, wherein, The recess (81) and a pair of strip-shaped holes (82) are formed in the valve core (8), the compression spring (84) is connected between the connecting seat (5) and the recess (81), a pair of strip-shaped holes (82) are symmetrically formed in the inner wall of the recess (81), the connecting pin (9) transversely penetrates a pair of strip-shaped holes (82), and the connecting pin (9) is in sliding fit with a pair of strip-shaped holes (82).

4. The valve trim assembly of claim 1, wherein, The outer wall of the lower end of the valve core (8) is provided with a plurality of sealing convex edges (83).

5. The valve trim assembly of claim 1, wherein, A plurality of guide pins (51) are installed in the connecting seat (5), and the outer side of the connecting block (7) is provided with an annular guide groove (72) capable of sliding fit with the guide pins (51).

6. The valve trim assembly of claim 1, wherein, The valve stem includes a locking rod portion (1), a first light rod portion (2), a drive screw portion (3) and a second light rod portion (4) connected in sequence, and the second light rod portion (4) is connected to the connecting block (7).

7. The valve trim assembly of claim 6, wherein, The connecting block (7) and the second light rod portion (4) are connected by bolts (41) and locked by butterfly nuts (42).

8. A forged steel globe valve comprising the valve trim assembly of any one of claims 1 to 7, characterized by, It also includes: The valve body (10) is capable of sealing connection with the valve core assembly; The valve cover (20) installed on the valve body (10); The hand wheel (30) connected to the first light rod portion (2), and the hexagonal nut (40) installed on the locking rod portion (1) capable of abutting against the hand wheel (30).

9. The forged steel globe valve of claim 8, wherein, The sealing seat (90) is installed in the valve body (10), the bottom of the sealing seat (90) is connected with a sealing pad (901), the sealing convex edge (83) abuts against the sealing surface (903) of the sealing seat (90), and the sealing seat (90) and the valve body (10) are further provided with an O-shaped sealing ring (101).

10. The forged steel globe valve of claim 8, wherein, The valve cover (20) is in threaded connection with the drive screw portion (3), the valve cover (20) and the drive screw portion (3) are filled with sealing packing (70), the drive screw portion (3) is provided with a packing gland (60) for blocking the sealing packing (70), and the valve cover (20) is provided with a packing pressing plate (50) for fixing the packing gland (60).

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