Clamping hook type balance double-gate-disc gate valve

Abstract

The utility model relates to the technical field of valves, in particular to a clamping hook type balance double-gate-plate gate valve. A supporting plate is connected with a self-sealing body through a plurality of second bolt assemblies. An annular groove is formed in the annular wall of the valve body, a four-element ring is installed in the annular groove, a pressing ring is arranged below the four-element ring, a self-sealing ring is arranged below the pressing ring, a 45-degree inclined face is arranged on the inner wall of the lower end opening of the self-sealing ring, and an inclined face matched with the 45-degree inclined face is arranged at the outer ring position of the upper plane of the lower portion of the self-sealing body. The self-sealing ring is clamped among the valve body, the self-sealing body and the pressing ring; a baffle ring is arranged on the upper plane of the lower part of the self-sealing body; the left flashboard and the right flashboard are mutually clamped through the arc clamping hooks, so that the double-flashboard assembly is more convenient to install and firm in connection; the inclined surfaces of the left gate plate and the right gate plate are sealing surfaces, are welded with wear-resistant and scratch-resistant hard alloys, and are in close fit with the sealing surfaces of the valve seat, so that the sealing performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a hook-type balanced double-disc gate valve. Background Art

[0002] Gate valves, used in high-temperature, high-pressure steam pipelines, are used to close or open the pipeline medium to maintain normal system operation. However, these gate valves currently suffer from bulky structures, high manufacturing costs, unstable performance, prone to leakage, and inconvenient maintenance. Utility Model Content

[0003] The purpose of the utility model is to address the defects and shortcomings of the existing technology and provide a hook-type balanced double-disc gate valve, which has the advantages of compact structure, reliable performance, tight sealing, and easy disassembly, thereby overcoming the defects of the existing high-temperature and high-pressure gate valves.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: it comprises a valve body, a valve seat, a valve stem and a bracket; a bracket is installed on the top opening of the valve body by means of a bolt assembly; a valve seat is installed at the middle position of the inlet and outlet of the valve body, and the valve stem is movably inserted into the mounting opening in the valve body, and its lower end is sealed with the valve seat by means of a double gate assembly; the upper end of the valve stem is connected to the driving device by means of a valve stem nut; a self-sealing body is used to seal the valve stem and the upper inner wall of the mounting opening; a packing is filled between the upper notch of the self-sealing body and the stem wall of the valve stem; the bottom of the packing is mounted on a packing pad, which is placed in the notch on the upper part of the self-sealing body, and a packing gland is pressed on the top of the packing; a splint is installed in the notch on the upper outer wall of the self-sealing body, and a movable screw is installed in the opening of the splint by means of a pin shaft. The bolt and the upper end of the movable bolt are movably inserted into the packing gland, and the upper end of the movable bolt is threadedly connected with a nut, and the nut is pressed on the top of the packing gland; a support plate is installed in the groove of the inner ring at the top of the installation port, and the support plate is connected to the self-sealing body by means of several bolt assemblies; the annular wall of the valve body is provided with an annular groove, and a four-way ring is installed in the annular groove, and a pressure ring is provided below the four-way ring, and a self-sealing ring is provided below the pressure ring, and the inner wall of the lower port of the self-sealing ring is provided with a 45° inclined surface, and the outer ring position of the lower upper plane of the self-sealing body is provided with an inclined surface matching the 45° inclined surface; the self-sealing ring is clamped between the valve body, the self-sealing body and the pressure ring; the lower upper plane of the self-sealing body is provided with a retaining ring; the double gate plate assembly includes a left gate plate and a right gate plate, and the left gate plate and the right gate plate are clamped by an arc hook.

[0005] Preferably, the driving device is mounted on the top end of the bracket using a bolt assembly.

[0006] Preferably, the valve stem nut is rotatably mounted in the top end of the bracket using several bearings, and the top end of the valve stem nut is connected to the connecting claw of the driving device using a connecting claw; a bearing cover is provided above the upper bearing, and the bearing cover is mounted in the top end of the bracket using a countersunk pin.

[0007] Preferably, the valve stem nut is sealed with a sealing ring between the inner wall of the bracket.

[0008] Preferably, the top end outer wall of the bracket is plugged with an oil injection hole plug in the oil injection hole at the valve stem nut position.

[0009] Preferably, the upper part of the left and right flashboard is provided with a T-shaped notch, the two T-shaped notches are buckled to form a whole, a cushion block is mounted on the bottom of the whole, and the bottom end of the valve stem is inserted into the whole.

[0010] Preferably, the contact surface between the left and right flashboard is provided with a notch, the two notches are buckled to form a whole, and a connecting block is clamped in the whole, and the side of the connecting block is connected with an adjusting block.

[0011] Preferably, the balance hole is provided in the left flashboard.

[0012] Preferably, the left side sealing surface of the left flashboard and the right side sealing surface of the right flashboard are welded with wear-resistant and scratch-resistant hard alloy.

[0013] Preferably, the lower end outer ring wall of the valve stem is provided with a lower taper surface, the bottom inner ring wall of the self-sealing body is provided with a self-sealing body taper surface, and the lower taper surface and the self-sealing body taper surface are matched and sealed.

[0014] Preferably, the circular arc hook on the left flashboard is integrally formed by bending towards the center position, the circular arc hook on the right flashboard is integrally formed by bending towards the circumferential position, and the two circular arc hooks are hooked with each other.

[0015] Compared with the prior art, the utility model has the advantages that the utility model provides a hook type balanced double flashboard gate valve, which has the advantages of compact structure, reliable performance, tight sealing, convenient disassembly and the like, and overcomes the defects of the existing high temperature and high pressure gate valve. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the utility model.

[0017] Figure 2 is Figure 1 is an enlarged view of A part in

[0018] Figure 3 is Figure 1 is an enlarged view of B part in

[0019] Figure 4 is Figure 1 is an enlarged view of C part in

[0020] Figure 5 is Figure 1 is an enlarged view of D part in

[0021] Figure 6 yes Figure 1 Enlarged view of middle part E.

[0022] Description of reference numerals:

[0023] Valve body 1, mounting port 1-1, annular groove 1-2, valve seat 2, left gate 3, balancing hole 3-1, right gate 4, valve stem 5, lower cone 5-1, self-sealing body 6, self-sealing body cone 6-1, pressure ring 7, four-ring 8, packing gasket 9, support plate 10, clamping plate 11, pin 12, packing gland 13, nut 14, flexible bolt 15, bracket 16, valve stem nut 17, bearing gland 18, bolt assembly one 19, drive device 20, bearing 21, oil filling hole plug 22, sealing ring 23, countersunk pin 24, packing 25, bolt assembly two 26, bolt assembly three 27, spacer 28, connecting block 29, adjusting block 30, arc hook 31, retaining ring 32, self-sealing ring 33, 45° inclined surface 33-1. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. The preferred embodiments in the description are only used as examples. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

[0025] like Figures 1-6As shown, this specific embodiment adopts the following technical solution: it includes a valve body 1, a valve seat 2, a valve stem 5 and a bracket 16; the bracket 16 is installed on the top opening of the valve body 1 by using a bolt assembly 3 27; the valve seat 2 is installed in the middle position of the inlet and outlet of the valve body 1, and the valve stem 5 is movably inserted into the installation port 1-1 in the valve body 1, and its lower end is sealed with the valve seat 2 by using a double gate assembly; the upper end of the valve stem 5 is threadedly connected to the valve stem nut 17, and the valve stem nut 17 is rotatably installed in the top end of the bracket 16 by using several bearings 21, and the top outer wall of the bracket 16 is located at the position of the valve stem nut 17. The oil filling hole is sealed with an oil filling hole plug 22, and the valve stem nut 17 and the inner wall of the bracket 16 are sealed by a sealing ring 23. The valve stem nut 1 The top of 7 is connected to the connecting claw of the drive device 20 by means of a connecting claw; a bearing cover 18 is provided above the upper bearing 21, and the bearing cover 18 is installed in the top of the bracket 16 by means of a countersunk pin 24, and the drive device 20 is installed on the top of the bracket 16 by means of a bolt assembly 19; the valve stem 5 is sealed with a self-sealing body 6 between the upper inner wall of the mounting port 1-1; a packing 25 is filled between the upper notch of the self-sealing body 6 and the rod wall of the valve stem 5; the bottom of the packing 25 is mounted on the packing pad 9, and the packing pad 9 is placed in the notch on the upper part of the self-sealing body 6, and a packing cover 13 is pressed on the top of the packing 25; a splint 11 is installed in the notch on the upper outer wall of the self-sealing body 6, and a pin 12 is used in the opening of the splint 11 A movable bolt 15 is installed, and the upper end of the movable bolt 15 is movably inserted into the packing gland 13. The upper end of the movable bolt 15 is threadedly connected to a nut 14, and the nut 14 is pressed above the packing gland 13; a support plate 10 is installed in the groove of the inner ring of the top end of the installation port 1-1, and the support plate 10 is connected to the self-sealing body 6 by using several bolt assemblies 26; the annular wall of the valve body 1 is provided with an annular groove 1-2, and a four-ring 8 is installed in the annular groove 1-2, and a pressure ring 7 is provided below the four-ring 8, and a self-sealing ring 33 is provided below the pressure ring 7, and the inner wall of the lower port of the self-sealing ring 33 is provided with a 45° inclined surface 33-1, and the outer ring position of the upper plane of the lower part of the self-sealing body 6 is provided with an inclined surface matching the 45° inclined surface 33-1; the self-sealing The ring 33 is clamped between the valve body 1, the self-sealing body 6 and the pressure ring 7; a retaining ring 32 is provided on the upper plane of the lower part of the self-sealing body 6; the double gate assembly includes a left gate plate 3 and a right gate plate 4, and a balancing hole 3-1 is opened through the left gate plate 3; the left sealing surface of the left gate plate 3 and the right sealing surface of the right gate plate 4 are welded with wear-resistant and scratch-resistant hard alloy; the arc hook 31 on the left gate plate 3 is bent toward the center of the circle and formed as an integral part, and the arc hook 31 on the right gate plate 4 is bent toward the circumference and formed as an integral part, and the two arc hooks 31 are hooked with each other; the upper parts of the left gate plate 3 and the right gate plate 4 are both provided with T-shaped notches, and the two T-shaped notches are buckled into a whole with a gasket 28 installed at the bottom, and the bottom end of the valve stem 5 is inserted into the inside of the whole;A notch is provided between the contact surfaces of the left and right gate plates 3, 4. The two notches snap together to form a single unit, with a connecting block 29 sandwiched within. An adjustment block 30 is attached to the side of the connecting block 29. The connecting block 29 is used to center the left and right gate plates 3, 4, and the adjustment block 30 is used to adjust the thickness of the combined left and right gate plates 3, 4. The outer annular wall at the lower end of the valve stem 5 is provided with a lower conical surface 5-1. The inner annular wall at the bottom of the self-sealing body 6 is provided with a self-sealing body conical surface 6-1. The lower conical surface 5-1 cooperates with the self-sealing body conical surface 6-1 to form a seal.

[0026] When the utility model is used, when the medium flows from the inlet to the outlet of the valve body 1, the self-sealing body 6 is subjected to the upward force of the medium and presses the self-sealing ring 33 through the 45° inclined surface 33-1. Since the upper part of the self-sealing ring 33 is pressed by the pressure ring 7 and the four-ring 8, the self-sealing ring 33 is compressed. The higher the medium pressure, the greater the compression force on the self-sealing ring 33 and the better the sealing performance; the connecting claw of the driving device 20 rotates, driving the valve stem nut 17 to rotate, and driving the valve stem 5 to rise and fall through the threaded transmission, thereby realizing the opening and closing of the valve; when the valve is fully opened, the lower conical surface 5-1 is completely consistent with the self-sealing body conical surface 6-1 to form an inverted seal, which effectively improves the sealing performance; the balancing hole 3-1 ensures that the inlet channel of the valve body 1 and the mounting port 1-1 of the valve body maintain pressure and temperature balance, avoiding stress damage to the valve body 1.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. Since the upper part of the self-sealing ring is pressed by the pressure ring and the four-ring, the self-sealing ring is compressed. The higher the medium pressure, the greater the compression force on the self-sealing ring, the better the sealing performance, and the better the sealing performance;

[0029] 2. The balance hole ensures that the pressure and temperature balance between the valve body inlet channel and the valve body installation port is maintained, preventing the valve body from being damaged by stress. The left and right gate plates are locked together by arc hooks, making the installation of the double gate assembly more convenient and the connection firm. The inclined surfaces of the left and right gate plates are sealing surfaces, and are welded with wear-resistant and scratch-resistant hard alloy. The valve seat sealing surface is closely matched, which improves the sealing performance.

[0030] 3. The upper end of the union screw passes through the packing gland and is connected to the nut. By tightening the nut, the packing gland is pressed down to compress the packing, further improving the sealing performance of the packing;

[0031] 4. When the valve is fully opened, the lower conical surface of the valve stem and the conical surface of the self-sealing body are completely matched to form an inverted seal, which improves the sealing performance of the valve when it is open.

[0032] For those skilled in the art, they can modify the technical solutions described in the aforementioned embodiments and make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A hook-type balanced double-disc gate valve, comprising a valve body (1), a valve seat (2), a valve stem (5) and a bracket (16); the bracket (16) is mounted on the top opening of the valve body (1) by means of a bolt assembly (27); a valve seat (2) is mounted in the middle of the inlet and outlet of the valve body (1); the valve stem (5) is movably inserted into the mounting opening (1-1) in the valve body (1), and the lower end thereof is sealed with the valve seat (2) by means of a double-disc assembly; the upper end of the valve stem (5) is connected to the driving device (20) by means of a valve stem nut (17). The valve stem (5) and the upper inner wall of the installation port (1-1) are sealed by a self-sealing body (6); a packing (25) is filled between the upper notch of the self-sealing body (6) and the stem wall of the valve stem (5); the bottom of the packing (25) is mounted on a packing pad (9), which is placed in the notch of the upper part of the self-sealing body (6), and a packing gland (13) is pressed on the top of the packing (25); a splint (11) is installed in the notch of the upper outer wall of the self-sealing body (6), and a pin ( 12) is provided with a movable bolt (15), the upper end of the movable bolt (15) is movably inserted into the packing gland (13), the upper end of the movable bolt (15) is threadedly connected to a nut (14), and the nut (14) is pressed above the packing gland (13); a support plate (10) is installed in the groove of the inner ring at the top end of the installation port (1-1), and the support plate (10) is connected to the self-sealing body (6) by using a plurality of bolt assemblies (26); the annular wall of the valve body (1) is provided with an annular groove (1-2), and the annular groove (1-2) A four-way ring (8) is installed inside, a pressure ring (7) is provided below the four-way ring (8), a self-sealing ring (33) is provided below the pressure ring (7), a 45° inclined surface (33-1) is provided on the inner wall of the lower end of the self-sealing ring (33), and an inclined surface matching the 45° inclined surface (33-1) is provided on the outer ring position of the lower upper plane of the self-sealing body (6); the self-sealing ring (33) is clamped between the valve body (1), the self-sealing body (6) and the pressure ring (7); a retaining ring (32) is provided on the lower upper plane of the self-sealing body (6); the characteristics are: The double gate assembly comprises a left gate (3) and a right gate (4), and the left gate (3) and the right gate (4) are clamped by an arc hook (31).

2. A hook-type balanced double-disc gate valve according to claim 1, characterized in that: The valve stem nut (17) is rotatably mounted in the top end of the bracket (16) by means of a plurality of bearings (21), and the top end of the valve stem nut (17) is connected to the connecting claw of the driving device (20) by means of a connecting claw; a bearing pressure cover (18) is provided above the upper bearing (21), and the bearing pressure cover (18) is mounted in the top end of the bracket (16) by means of a countersunk latch (24).

3. A hook-type balanced double-disc gate valve according to claim 2, characterized in that: The valve stem nut (17) and the inner wall of the bracket (16) are sealed by a sealing ring (23).

4. A hook-type balanced double-disc gate valve according to claim 3, characterized in that: An oil filling hole plug (22) is sealed in the oil filling hole opened at the position of the valve stem nut (17) on the top outer wall of the bracket (16).

5. The hook-type balanced double-disc gate valve according to claim 4, characterized in that: The upper parts of the left gate plate (3) and the right gate plate (4) are both provided with T-shaped notches, the bottom of which is buckled together to form a whole and is provided with a cushion block (28), and the bottom end of the valve stem (5) is inserted into the whole.

6. The hook-type balanced double-disc gate valve according to claim 5, characterized in that: A notch is provided between the contact surfaces of the left gate plate (3) and the right gate plate (4); the two notches are buckled together to form a whole with a connecting block (29) sandwiched therein; and an adjustment block (30) is connected to the side of the connecting block (29).

7. The hook-type balanced double-disc gate valve according to claim 6, characterized in that: A balancing hole (3-1) is provided through the left gate plate (3).

8. The hook-type balanced double-disc gate valve according to claim 7, characterized in that: The left sealing surface of the left gate plate (3) and the right sealing surface of the right gate plate (4) are both welded with wear-resistant and scratch-resistant hard alloy.

9. The hook-type balanced double-disc gate valve according to claim 8, characterized in that: The outer ring wall at the lower end of the valve stem (5) is provided with a lower conical surface (5-1), and the inner ring wall at the bottom of the self-sealing body (6) is provided with a self-sealing body conical surface (6-1). The lower conical surface (5-1) and the self-sealing body conical surface (6-1) are arranged in a sealing manner.

10. The hook-type balanced double-disc gate valve according to claim 9, characterized in that: The circular arc hook (31) on the left gate plate (3) is bent toward the center of the circle and is integrally formed, and the circular arc hook (31) on the right gate plate (4) is bent toward the circumference and is integrally formed, and the two circular arc hooks (31) are hooked with each other.

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