Combined claw type double-gate-disc gate valve

Abstract

A combined claw type double-gate-plate gate valve relates to the technical field of gate valves and is characterized in that a valve seat is mounted in an inlet and outlet channel of a valve body, a double-gate-plate component is mounted in the valve seat, the lower end of a valve rod is connected with the double-gate-plate component, and the valve rod penetrates through the valve body and a support mounted on the valve body and then is connected with a driving device through a lifting mechanism; the driving device is mounted at the top of the bracket; the valve rod and a middle mounting port of the valve body are sealed through a self-sealing mechanism; and a packing sealing mechanism is arranged between the valve rod and the upper end part of the self-sealing body. The valve is mainly applied to a high-temperature and high-pressure steam pipeline and used for closing or opening a pipeline medium and keeping normal operation of a system. The device has the advantages of compact structure, reliable performance, tight sealing, convenience in disassembly and the like.

Description

Technical Field

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

[0002] Existing high-temperature and high-pressure gate valves have defects such as bulky structure, high manufacturing cost, unstable performance, easy 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 claw-type double-disc gate valve, which is mainly used in high-temperature and high-pressure steam pipelines to close or open the pipeline medium and maintain the normal operation of the system; it has the advantages of compact structure, reliable performance, tight sealing, and easy disassembly.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: it includes a valve body, a valve seat, a double gate assembly and a valve stem; a valve seat is installed in the inlet and outlet channels of the valve body, a double gate assembly is installed in the valve seat, the lower end of the valve stem is connected to the double gate assembly, the valve stem passes through the valve body and the bracket installed on the valve body, and is connected to the driving device through a lifting mechanism; the driving device is installed at the top of the bracket; the valve stem and the middle mounting port of the valve body are sealed by a self-sealing mechanism; a packing sealing mechanism is provided between the valve stem and the upper end of the self-sealing body.

[0005] Furthermore, the double gate plate assembly includes a right gate plate and a left gate plate, the right gate plate and the left gate plate are symmetrically arranged, and the left inclined surface of the left gate plate is a sealing surface, and the right side surface is symmetrically provided with two engaging claws in the horizontal direction; the right inclined surface of the right gate plate is a sealing surface, and the left side surface is symmetrically provided with two engaging claws in the vertical direction, and the left gate plate and the right gate plate are engaged with each other by means of their respective engaging claws, and the four engaging claws form a complete circular structure, and the outer periphery of the circular structure is sleeved with an adjustment ring; T-slot structures are provided at the top of the left gate plate and the right gate plate, and the two T-slot structures form a T-slot, a gasket is installed in the T-slot, and the lower end of the valve stem is installed in the T-slot.

[0006] Furthermore, the self-sealing mechanism comprises:

[0007] A self-sealing body is movably arranged in the middle mounting opening of the valve body and sleeved on the valve stem. The outer ring of the self-sealing body is provided with a 45° bevel. The contact position between the lower end of the self-sealing body and the valve stem is provided with a port cone. The port cone cooperates with the valve stem bevel integrally formed at the lower end of the valve stem to form an inverted sealing mechanism.

[0008] A self-sealing ring, the inner ring of which is also provided with a 45° bevel structure matching the 45° bevel, and the self-sealing ring is embedded between the 45° bevel and the inner wall of the valve body;

[0009] A pressure ring, the pressure ring being arranged on the self-sealing ring;

[0010] A four-way ring, wherein the outer ring of the four-way ring is clamped in the annular groove of the upper port of the middle installation opening of the valve body; the inner ring of the four-way ring is pressed on the pressure ring;

[0011] The backing plate is sleeved on the outside of the self-sealing body, and the outer ring of the backing plate is arranged in the top port of the middle installation port of the valve body, and the inner ring of the backing plate is clamped in the inner ring of the four-ring.

[0012] Furthermore, the packing sealing mechanism comprises:

[0013] A stuffing pad is sleeved on the valve stem and installed at the bottom of the stuffing box at the upper end of the self-sealing body; the stuffing is arranged in the stuffing box of the self-sealing body;

[0014] A packing gland, which is sleeved on the valve stem and arranged on the top of the packing;

[0015] A packing pressure plate is sleeved on the valve stem and arranged on the top of the packing gland; a movable bolt is connected to the packing gland by tightening a nut, the lower end of the movable bolt is connected to the check plate by a pin, the check plate is sleeved on the upper part of the self-sealing body, and the check plate is fixed to the gasket by a screw;

[0016] The split ring is clamped in the grooves of the upper end of the self-sealing body and the upper port of the containment disc.

[0017] Furthermore, the lifting mechanism includes a valve stem nut, which is threadedly connected to the upper end of the valve stem, and a sealing ring is provided between the lower end of the valve stem nut and the inner wall of the bracket; the valve stem nut is rotatably installed in the top end of the bracket using several bearings; a bearing end cover is installed on the upper bearing, and the bearing end cover is connected to the top end of the bracket using a countersunk screw; the top end of the valve stem is connected to the driving device through a connecting claw.

[0018] Furthermore, a bolt assembly three is installed in the bottom opening of the valve body.

[0019] Furthermore, an oil filling hole is provided at the upper end of the bracket at a position outside the valve stem nut, and an oil filling hole plug is provided in the oil filling hole.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a combined claw-type double-disc gate valve, which is mainly used in high-temperature and high-pressure steam pipelines to close or open the pipeline medium and maintain the normal operation of the system; it has the advantages of compact structure, reliable performance, tight sealing, and easy disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a structural diagram of the present utility model.

[0022] Figure 2 yes Figure 1 Enlarged view of part B in the middle.

[0023] Figure 3 It is a structural schematic diagram of the left gate plate in the utility model.

[0024] Figure 4 yes Figure 3 Right view of .

[0025] Figure 5 It is a structural diagram of the right gate in the utility model.

[0026] Figure 6 yes Figure 1 Enlarged view of part A in the middle.

[0027] Figure 7 It is a structural diagram of the packing sealing mechanism in the utility model.

[0028] Figure 8 yes Figure 1 Enlarged view of part C in the middle.

[0029] Description of reference numerals:

[0030] Valve body 1, annular groove 1-1, valve seat 2, right gate 3, valve stem 4, valve stem bevel 4-1, self-sealing body 5, 45° bevel 5-1, port cone 5-2, self-sealing ring 6, 45° bevel 6-1, pressure ring 7, four-in-one ring 8, flange 9, bolt assembly one 10, screw 11, bracket 12, sealing ring 13, bearing 14, valve stem nut 15, countersunk screw 16, bolt assembly two 17, drive device 18, bearing end cover 19, oil filling hole plug 20, flexible bolt 21, tightening nut 22, packing pressure plate 23, packing sleeve 24, split ring 25, pin 26, check plate 27, gasket 28, packing 29, packing pad 30, left gate 31, spacer 32, bolt assembly three 33, T-slot structure 34, coupling claw 35, adjusting ring 36. DETAILED DESCRIPTION

[0031] 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.

[0032] like Figures 1-8As shown, this specific embodiment adopts the following technical solution: it includes a valve body 1, a valve seat 2, a double gate assembly and a valve stem 4; a bolt assembly 33 is installed in the bottom opening of the valve body 1, a valve seat 2 is installed in the inlet and outlet channels of the valve body 1, a double gate assembly is installed in the valve seat 2, the lower end of the valve stem 4 is connected to the double gate assembly, the valve stem 4 passes through the valve body 1 and a bracket 12 installed on the valve body 1, and is connected to the drive device 18 through a lifting mechanism, the lower end surface of the bracket 12 is integrally formed with a flange disk surface 9, and the flange disk surface 9 and the valve body 1 are connected and fixed by a bolt assembly 10; the drive device 18 is installed at the top of the bracket 12; the valve stem 4 and the middle installation port of the valve body 1 are sealed by a self-sealing mechanism; a packing sealing mechanism is provided between the valve stem 4 and the upper end of the self-sealing body;

[0033] The double gate assembly includes a right gate plate 3 and a left gate plate 31, the right gate plate 3 and the left gate plate 31 are symmetrically arranged, and the left inclined surface of the left gate plate 31 is a sealing surface, and the right side surface is symmetrically provided with two engaging claws 35 in the horizontal direction; the right inclined surface of the right gate plate 3 is a sealing surface, and the left side surface is symmetrically provided with two engaging claws 35 in the vertical direction, the left gate plate 31 and the right gate plate 3 are engaged with each other by using their respective engaging claws 35, the four engaging claws 35 form a complete circular structure, and the outer periphery of the circular structure is sleeved with an adjusting ring 36; the adjusting ring 36 is used to adjust the thickness of the left gate plate 31 and the right gate plate 3 after they are combined, wear-resistant and abrasion-resistant hard alloy is welded on the sealing surface, and the sealing surface is tightly matched with the sealing surface of the valve seat 2; the top of the left gate plate 31 and the right gate plate 3 are both provided with a T-slot structure 34, the two T-slot structures 34 form a T-slot, a pad 32 is installed in the T-slot, and the lower end of the valve stem 4 is installed in the T-slot;

[0034] The self-sealing mechanism comprises:

[0035] A self-sealing body 5 is movably arranged in the middle mounting opening of the valve body 1 and sleeved on the valve stem 4. The outer ring of the self-sealing body 5 is provided with a 45° inclined surface 5-1, and the contact position between the lower end of the self-sealing body 5 and the valve stem 4 is provided with a port cone surface 5-2. The port cone surface 5-2 cooperates with the valve stem inclined surface 4-1 integrally formed at the lower end of the valve stem 4 to form an inverted sealing mechanism;

[0036] A self-sealing ring 6, the inner ring of which is also provided with a 45° bevel structure matching the 45° bevel 5-1, and the self-sealing ring 6 is embedded between the 45° bevel 5-1 and the inner wall of the valve body 1;

[0037] A pressure ring 7, wherein the pressure ring 7 is arranged on the self-sealing ring 6;

[0038] A four-way ring 8, the outer ring of which is clamped in the annular groove 1-1 provided with the upper end of the middle installation opening of the valve body 1; the inner ring of the four-way ring 8 is pressed onto the pressure ring 7;

[0039] The gasket 28 is sleeved on the outside of the self-sealing body 5, and the outer ring of the gasket 28 is set in the top port of the middle installation port of the valve body 1, and the inner ring of the gasket 28 is clamped in the inner ring of the four-ring 8;

[0040] The packing sealing mechanism comprises:

[0041] A packing pad 30 is sleeved on the valve stem 4 and installed at the bottom of the stuffing box at the upper end of the self-sealing body 5; the packing 29 is arranged in the stuffing box of the self-sealing body 5;

[0042] A packing gland 24 is sleeved on the valve stem 4 and is arranged on top of the packing 29;

[0043] The packing pressure plate 23 is sleeved on the valve stem 4 and is arranged on the top of the packing gland 24. The packing gland 24 is connected to the movable bolt 21 by tightening the nut 22. The lower end of the movable bolt 21 is connected to the check plate 27 by a pin 26. The check plate 27 is sleeved on the upper part of the self-sealing body 5 and is fixed to the backing plate 28 by a screw 11. The tightening nut 22 is turned to press the packing pressure plate 23 and the packing gland 24 downward, and the packing gland 24 compresses the packing 29.

[0044] A split ring 25 is clamped in a groove between the upper end of the self-sealing body 5 and the upper end of the restraining plate 27;

[0045] The lifting mechanism includes a valve stem nut 15, which is connected to the upper end of the valve stem 4 by a threaded connection, and a sealing ring 13 is provided between the lower end of the valve stem nut 15 and the inner wall of the bracket 12; an oil filling hole is provided at the upper end of the bracket 12 at the outer side of the valve stem nut 15, and an oil filling hole plug 20 is provided in the oil filling hole; the valve stem nut 15 is rotatably installed in the top end of the bracket 12 by means of several bearings 14; a bearing end cover 19 is installed on the upper bearing 14, and the bearing end cover 19 is connected to the top end of the bracket 12 by means of a countersunk screw 16; the top end of the valve stem 4 is connected to the driving device 18 by a connecting claw, and the driving device 18 is connected and fixed to the top end of the bracket 12 by means of a bolt assembly 2 17.

[0046] 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 5 is subjected to the upward force of the medium, and the self-sealing ring 6 is pressed by the 45-degree inclined surface 47 of the self-sealing body. Since the upper part of the self-sealing ring 6 is pressed by the pressure ring 7 and the four-ring 8, the self-sealing ring 6 is compressed. The higher the medium pressure, the greater the compression force on the self-sealing ring 6 and the better the sealing performance; the connecting claw of the driving device 18 rotates, driving the valve stem nut 15 to rotate, and driving the valve stem 4 to rise and fall through the threaded transmission, thereby realizing the opening and closing of the valve; when the valve is fully opened, the valve stem inclined surface 4-1 is completely consistent with the port cone surface 5-2 at the lower end of the self-sealing body 5 to form an inverted seal, which effectively improves the sealing performance.

[0047] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a combined claw-type double-disc gate valve, which is mainly used in high-temperature and high-pressure steam pipelines to close or open the pipeline medium and maintain the normal operation of the system; it has the advantages of compact structure, reliable performance, tight sealing, and easy disassembly.

[0048] 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 combined claw type double-disc gate valve, characterized in that: It comprises a valve body (1), a valve seat (2), a double gate assembly and a valve stem (4); the valve seat (2) is installed in the inlet and outlet channels of the valve body (1), the double gate assembly is installed in the valve seat (2), the lower end of the valve stem (4) is connected to the double gate assembly, the valve stem (4) passes through the valve body (1) and a bracket (12) installed on the valve body (1), and is connected to a driving device (18) through a lifting mechanism; the driving device (18) is installed at the top of the bracket (12); the valve stem (4) and the middle installation port of the valve body (1) are sealed by a self-sealing mechanism; a packing sealing mechanism is provided between the valve stem (4) and the upper end of the self-sealing body; the self-sealing mechanism comprises: A self-sealing body (5), wherein the self-sealing body (5) is movably arranged in the middle mounting opening of the valve body (1) and is sleeved on the valve stem (4); the outer ring of the self-sealing body (5) is provided with a 45° inclined surface (5-1); the contact position between the lower end of the self-sealing body (5) and the valve stem (4) is provided with a port cone surface (5-2); the port cone surface (5-2) and the valve stem inclined surface (4-1) integrally formed at the lower end of the valve stem (4) are arranged to cooperate and abut against each other; the port cone surface (5-2) and the valve stem inclined surface (4-1) constitute an inverted sealing mechanism; A self-sealing ring (6), the inner ring of which is also provided with a 45° inclined surface structure matching the 45° inclined surface (5-1), and the self-sealing ring (6) is embedded between the 45° inclined surface (5-1) and the inner wall of the valve body (1); A pressure ring (7), wherein the pressure ring (7) is arranged on the self-sealing ring (6); A four-way ring (8), wherein the outer ring of the four-way ring (8) is clamped in an annular groove (1-1) provided with an upper end of a middle mounting opening of the valve body (1); and the inner ring of the four-way ring (8) is pressed onto the pressure ring (7); A gasket (28) is sleeved on the outside of the self-sealing body (5), and the outer ring of the gasket (28) is set in the top port of the middle installation port of the valve body (1), and the inner ring of the gasket (28) is clamped in the inner ring of the four-ring (8).

2. A combined claw type double-disc gate valve according to claim 1, characterized in that: The double gate assembly comprises a right gate (3) and a left gate (31), wherein the right gate (3) and the left gate (31) are symmetrically arranged, and the left inclined surface of the left gate (31) is a sealing surface, and the right side is symmetrically provided with two engaging claws (35) in the horizontal direction; the right inclined surface of the right gate (3) is a sealing surface, and the left side is symmetrically provided with two engaging claws (35) in the vertical direction, and the left gate (31) and the right gate (3) are mutually engaged with each other by using their respective engaging claws (35), and the four engaging claws (35) form a complete annular structure, and the outer periphery of the annular structure is sleeved with an adjusting ring (36); the top ends of the left gate (31) and the right gate (3) are both provided with a T-shaped slot structure (34), and the two T-shaped slot structures (34) form a T-shaped slot, a pad (32) is installed in the T-shaped slot, and the lower end of the valve stem (4) is installed in the T-shaped slot.

3. The claw-type double-disc gate valve according to claim 1, characterized in that: The packing sealing mechanism comprises: A stuffing pad (30) is sleeved on the valve stem (4) and installed at the bottom of the stuffing box at the upper end of the self-sealing body (5); the stuffing (29) is arranged in the stuffing box of the self-sealing body (5); A packing gland (24), wherein the packing gland (24) is sleeved on the valve stem (4) and arranged on the top of the packing (29); A packing pressure plate (23) is sleeved on the valve stem (4) and arranged on the top of the packing pressure sleeve (24); a movable bolt (21) is connected to the packing pressure sleeve (24) by means of a tightening nut (22); the lower end of the movable bolt (21) is connected to a check plate (27) by means of a pin (26); the check plate (27) is sleeved on the upper part of the self-sealing body (5), and the check plate (27) is fixed to a backing plate (28) by means of a screw (11); A split ring (25) is clamped in a groove between the upper end of the self-sealing body (5) and the upper end of the restraining disc (27).

4. A combined claw type double-disc gate valve according to claim 3, characterized in that: The lifting mechanism includes a valve stem nut (15), which is connected to the upper end of the valve stem (4) by means of a thread, and a sealing ring (13) is provided between the lower end of the valve stem nut (15) and the inner wall of the bracket (12); the valve stem nut (15) is rotatably mounted in the top end of the bracket (12) by means of a plurality of bearings (14); a bearing end cover (19) is mounted on the upper bearing (14), and the bearing end cover (19) is connected to the top end of the bracket (12) by means of a countersunk screw (16); the top end of the valve stem (4) is connected to the driving device (18) by means of a connecting claw.

5. The claw-type double-disc gate valve according to claim 4, characterized in that: A bolt assembly three (33) is installed in the bottom opening of the valve body (1).

6. The claw-type double-disc gate valve according to claim 5, characterized in that: An oil filling hole is provided at the upper end of the bracket (12) at the outer side of the valve stem nut (15), and an oil filling hole plug (20) is provided in the oil filling hole.

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