Rubber lining gate valve

Abstract

The utility model relates to the technical field of gate valve devices, and discloses a rubber lining gate valve which comprises a valve body, a lining rubber ring is fixedly connected to the inner surface of the valve body, an upper valve body mechanism is fixedly connected to the outer surface of the upper side of the middle of the valve body, and a valve rod mechanism is fixedly connected to the middle of the upper valve body mechanism. The lower side of the valve rod mechanism is rotationally connected with a gate plate mechanism, the gate plate mechanism moves in the valve body and the upper valve body mechanism, the upper side of the upper valve body mechanism is fixedly connected with a lifting mechanism, the upper end of the valve rod mechanism is fixedly connected with a hand wheel mechanism, and a warning mechanism is arranged on the lower side of the hand wheel mechanism. The warning mechanism is arranged, the position of the hand wheel pressing plate can be detected through the trigger pressing rod arranged on the rear side of the warning box, then the purpose of detecting whether the gate valve is completely closed or not is achieved, and a warning signal is sent out through the LED warning lamp when it is detected that the gate valve is not completely closed.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valve devices, in particular to a rubber lined gate valve. Background Art

[0002] The rubber lined gate valve is a valve that uses rubber lining materials to improve the corrosion resistance and sealing of the valve. Its working principle is to use the gate to connect or cut off the medium in the pipeline. The characteristic of the rubber lined gate valve is that the inner surface of the valve body is fully or partially lined with rubber to improve the wear resistance, corrosion resistance and sealing performance of the valve.

[0003] The existing patent (Announcement No.: CN206539770U) discloses a flanged signal gate valve, which relates to the technical field of fire signal gate valves. It includes a valve body, a rubber-lined gate plate, a valve cover, a valve stem, a sealing gland and a handwheel. A driving gear is arranged on the exposed valve stem below the handwheel, an adjustable bracket is fixedly installed on the sealing gland, and a signal assembly is connected to the bracket. The signal assembly includes a junction box and a driven gear. The junction box is built with a wiring terminal, a micro switch and a transmission screw. A cam block is fixedly installed on the part of the transmission screw extending into the junction box. The cam block is powered on or off by contacting or disconnecting with the micro switch. A driven gear is installed on the part of the transmission screw exposed outside the junction box, and the driven gear is meshed with the driving gear. The utility model uses the mechanical transmission of the gear to start the alarm reminder function to assist on-site management personnel to timely judge and deal with the gate valve that is not in a fully open state, eliminating fire safety hazards.

[0004] In this application, mechanical transmission of gears is adopted so that the cam block in the signal device assembly moves up and down with the transmission screw, thereby making the cam block contact or disconnect with the micro switch to realize power on or off. The advantage of this technical solution is that the signal accuracy is high, but its disadvantage is that the signal device assembly is arranged directly below the handwheel and moves up and down with the transmission screw, which causes the signal device assembly to hinder the use of the handwheel and the follow-up signal device assembly has a complex structure and low mechanical strength, which increases the maintenance cost of the gate valve device. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a rubber lined gate valve, aiming to improve the problems in the prior art that the signal device assembly will hinder the use of the hand wheel and the follow-up signal device assembly has a complex structure and low mechanical strength.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rubber lined gate valve, comprising a valve body, the inner surface of the valve body is fixedly connected with an inner lining rubber ring, the middle upper outer surface of the valve body is fixedly connected with an upper valve body mechanism, the middle part of the upper valve body mechanism is fixedly connected with a valve stem mechanism, the lower side of the valve stem mechanism is rotatably connected with a gate mechanism, the gate mechanism is movable with the valve body and the interior of the upper valve body mechanism, the upper side of the upper valve body mechanism is fixedly connected with a lifting mechanism, the inner surface of the lifting mechanism is threadedly connected with the upper outer surface of the valve stem mechanism, the upper end of the valve stem mechanism is fixedly connected with a handwheel mechanism, the lower side of the handwheel mechanism is provided with a warning mechanism, the left and right ends of the valve body are fixedly connected with flange connecting rings, and the flange connecting rings are provided with multiple groups of mounting holes.

[0007] As a further description of the above technical solution:

[0008] The upper valve body mechanism includes a gate plate activity chamber and a fixed plate. The lower side of the gate plate activity chamber is fixedly connected to the outer surface of the middle upper side of the valve body, and the upper side of the gate plate activity chamber is fixedly connected to the lower side of the fixed plate. An upper sealing plate is provided on the upper side of the fixed plate. The fixed plate and the upper sealing plate are fixedly connected to each other by sealing bolts.

[0009] As a further description of the above technical solution:

[0010] The valve stem mechanism includes a sealing sleeve, a sealing pressure ring, and a threaded valve stem. The sealing sleeve is fixedly connected to the middle part of the upper sealing plate, the sealing pressure ring is fixedly connected to the upper side of the sealing sleeve, and the middle outer surface of the threaded valve stem is slidably connected to the inner surfaces of the sealing sleeve and the sealing pressure ring.

[0011] As a further description of the above technical solution:

[0012] The gate mechanism includes a gate body and a gate outer lining rubber layer. The upper side of the gate body is rotatably connected to the lower end of the threaded valve stem, the outer surface of the gate body is fixedly connected to the inner surface of the gate body, and the outer edge of the gate outer lining rubber layer is fixedly connected to multiple groups of gate outer edge rubber rings. The outer edge of the gate outer lining rubber layer and the outer surface of the gate outer edge rubber ring are both in close contact with the inner surface of the inner lining rubber ring.

[0013] As a further description of the above technical solution:

[0014] The lifting mechanism includes a support frame and a lifting threaded sleeve. The lower side of the support frame is fixedly connected to the upper surface of the upper sealing plate, the upper middle part of the support frame is fixedly connected to the outer surface of the lifting threaded sleeve, the inner surface of the lifting threaded sleeve is threadedly connected to the upper outer surface of the threaded valve stem, the upper side of the lifting threaded sleeve is fixedly connected to a limiting fixing plate, and the middle outer surface of the limiting fixing plate is slidably connected to the upper outer surface of the threaded valve stem.

[0015] As a further description of the above technical solution:

[0016] The handwheel mechanism includes a handwheel pressure plate and a handwheel outer ring. The middle part of the handwheel pressure plate is slidably connected to the upper end of the threaded valve stem. The outer edge of the handwheel pressure plate is fixedly connected to multiple groups of connecting rods. The outer ends of the connecting rods are fixedly connected to the inner surface of the handwheel outer ring. A clamping nut is provided on the upper side of the handwheel pressure plate, and the inner surface of the clamping nut is threadedly connected to the upper end of the threaded valve stem.

[0017] As a further description of the above technical solution:

[0018] The warning mechanism includes a warning box, an LED warning light, and a trigger pressure rod. The upper side of the warning box is fixedly connected to the upper lower surface of the support frame, the left side of the warning box is fixedly connected to the right side of the LED warning light, and a trigger pressure rod is provided on the right upper surface of the warning box. The upper end of the trigger pressure rod passes through the support frame, the limit fixing plate and contacts with the lower surface of the handwheel pressure plate.

[0019] As a further description of the above technical solution:

[0020] An internal filling rubber layer is fixedly connected to the interior of the gate movable chamber, a filling rubber pad with holes is arranged on the upper side of the internal filling rubber layer, and the inner surface of the filling rubber pad with holes is slidably connected to the outer surface of the threaded valve stem.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, a warning mechanism is provided, and the position of the handwheel pressure plate can be detected by a trigger pressure rod arranged at the rear side of the warning box, thereby achieving the purpose of detecting whether the gate valve is completely closed, and sending a warning signal through the LED warning light when it is detected that the gate valve is not completely closed, thereby avoiding leakage accidents caused by the gate valve not being completely closed.

[0023] 2. In the utility model, a plurality of rubber rings with outer edges of the gate plates are arranged on the outer edge of the rubber lining layer of the gate plates. The plurality of rubber rings with outer edges of the gate plates can maintain a tight sealing effect when a groove corresponding to the gate plate body is not preset on the lower side of the valve body, and avoid the poor sealing effect caused by the accumulation of sediments in the preset groove on the lower side of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a front perspective schematic diagram of a rubber lined gate valve proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the internal details of a rubber lined gate valve proposed by the utility model;

[0026] Figure 3 The utility model is a side sectional schematic diagram of a rubber lined gate valve.

[0027] Legend:

[0028] 1. Valve body; 2. Lined rubber ring; 3. Upper valve body mechanism; 301. Gate activity chamber; 302. Fixed plate; 303. Upper sealing plate; 304. Sealing bolt; 4. Valve stem mechanism; 401. Sealing sleeve; 402. Sealing pressure ring; 403. Threaded valve stem; 5. Gate mechanism; 501. Gate body; 502. Gate outer lining rubber layer; 503. Gate outer rubber ring; 6. Lifting mechanism; 601. Support frame; 602. Lifting threaded sleeve; 603. Limiting fixed plate; 7. Handwheel mechanism; 701. Handwheel pressure plate; 702. Connecting rod; 703. Handwheel outer ring; 704. Pressing nut; 8. Warning mechanism; 801. Warning box; 802. LED warning light; 803. Trigger pressure rod; 9. Internal filling rubber layer; 10. Filling rubber pad with holes; 11. Flange connection ring; 12. Mounting hole. DETAILED DESCRIPTION

[0029] 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.

[0030] Reference Figure 1-3 The utility model provides an embodiment: a rubber lined gate valve, comprising a valve body 1, an inner surface of the valve body 1 is fixedly connected with an inner lining rubber ring 2, the inner lining rubber ring 2 can isolate the contact between the medium and the valve body 1, an upper valve body mechanism 3 is fixedly connected to the outer surface of the middle upper side of the valve body 1, the upper valve body mechanism 3 can provide a closed activity space for the gate mechanism 5, the middle of the upper valve body mechanism 3 is fixedly connected with a valve stem mechanism 4, the lower side of the valve stem mechanism 4 is rotatably connected with a gate mechanism 5, the gate mechanism 5 moves inside the valve body 1 and the upper valve body mechanism 3, the upper valve body mechanism 3 A lifting mechanism 6 is fixedly connected to the upper side, and the inner surface of the lifting mechanism 6 is threadedly connected to the upper outer surface of the valve stem mechanism 4. The valve stem mechanism 4 and the lifting mechanism 6 are the main lifting driving structures of the gate mechanism 5. The upper end of the valve stem mechanism 4 is fixedly connected to a handwheel mechanism 7, and the handwheel mechanism 7 is the main operating mechanism of the device. A warning mechanism 8 is arranged on the lower side of the handwheel mechanism 7. The warning mechanism 8 can realize the purpose of detecting whether the gate valve is completely closed. The left and right ends of the valve body 1 are fixedly connected with flange connecting rings 11, and the flange connecting rings 11 are provided with multiple groups of mounting holes 12.

[0031] The upper valve body mechanism 3 includes a gate plate activity chamber 301 and a fixed plate 302. The lower side of the gate plate activity chamber 301 is fixedly connected to the outer surface of the middle upper side of the valve body 1, and the upper side of the gate plate activity chamber 301 is fixedly connected to the lower side of the fixed plate 302. An upper sealing plate 303 is provided on the upper side of the fixed plate 302. The fixed plate 302 and the upper sealing plate 303 are fixedly connected to each other by sealing bolts 304.

[0032] An internal filling rubber layer 9 is fixedly connected to the inside of the gate activity chamber 301 , and a perforated filling rubber pad 10 is arranged on the upper side of the internal filling rubber layer 9 . The inner surface of the perforated filling rubber pad 10 is slidably connected to the outer surface of the threaded valve stem 403 .

[0033] The function of the gate movable chamber 301 is to provide a closed movable space for the gate mechanism 5 to prevent medium leakage. The interior of the gate movable chamber 301 is fixedly connected with an internal filling rubber layer 9 and a perforated filling rubber pad 10. The internal filling rubber layer 9 and the perforated filling rubber pad 10 can buffer the friction and impact between the gate mechanism 5 and the gate movable chamber 301 during the opening and closing process, and avoid the contact between the medium and the inner wall of the gate movable chamber 301, thereby extending the service life of the gate valve. At the same time, it also increases the sealing performance of the gate valve and prevents the medium from leaking from the upper part of the gate movable chamber 301. The fixed connection method of the fixed plate 302 and the upper sealing plate 303 using sealing bolts 304 ensures the strength and stability of the upper valve body mechanism 3.

[0034] The valve stem mechanism 4 includes a sealing sleeve 401, a sealing pressure ring 402, and a threaded valve stem 403. The sealing sleeve 401 is fixedly connected to the middle part of the upper sealing plate 303, the sealing pressure ring 402 is fixedly connected to the upper side of the sealing sleeve 401, and the middle outer surface of the threaded valve stem 403 is slidably connected to the inner surfaces of the sealing sleeve 401 and the sealing pressure ring 402.

[0035] A sealed cavity is formed between the sealing sleeve 401 and the sealing pressure ring 402 to prevent the medium from leaking from the valve stem. At the same time, it also provides a smooth sliding surface for the threaded valve stem 403 to reduce friction resistance and ensure flexible movement of the valve stem. The threaded valve stem 403 can convert the rotational torque of the handwheel mechanism 7 or other driving device into a rising torque and transmit it to the gate mechanism 5, thereby realizing the opening and closing of the gate valve.

[0036] The gate mechanism 5 includes a gate body 501 and a gate outer lining rubber layer 502. The upper side of the gate body 501 is rotatably connected to the lower end of the threaded valve stem 403. The outer surface of the gate body 501 is fixedly connected to the inner surface of the gate body 501. The outer edge of the gate outer lining rubber layer 502 is fixedly connected to multiple groups of gate outer edge rubber rings 503. The outer edge of the gate outer lining rubber layer 502 and the outer surface of the gate outer edge rubber ring 503 are both in close contact with the inner surface of the inner lining rubber ring 2.

[0037] The gate body 501 is the main opening and closing part of the gate valve. Through the rotational connection with the threaded valve stem 403, the gate valve can be cut off to prevent or allow the flow of the medium. The gate outer lining rubber layer 502 is the main sealing part of the gate valve. Through the fixed connection with the gate body 501, the corrosion resistance and sealing of the gate valve can be enhanced to prevent the erosion and leakage of the gate body 501 by the medium. The rubber ring 503 on the outer edge of the gate is the auxiliary sealing part of the gate valve. Through the fixed connection with the outer edge of the gate outer lining rubber layer 502, the sealing effect of the gate valve can be improved, the sealing area of ​​the gate valve can be increased, the contact pressure between the gate and the inner lining rubber ring 2 can be buffered, and the damage and deformation of the sealing surface can be prevented.

[0038] The lifting mechanism 6 includes a support frame 601 and a lifting threaded sleeve 602. The lower side of the support frame 601 is fixedly connected to the upper surface of the upper sealing plate 303. The middle part of the upper side of the support frame 601 is fixedly connected to the outer surface of the lifting threaded sleeve 602. The inner surface of the lifting threaded sleeve 602 is threadedly connected to the upper outer surface of the threaded valve stem 403. The upper side of the lifting threaded sleeve 602 is fixedly connected to a limiting fixing plate 603. The middle outer surface of the limiting fixing plate 603 is slidably connected to the upper outer surface of the threaded valve stem 403.

[0039] The support frame 601 can support the movement of the valve stem 403 by being fixedly connected with the upper sealing plate 303, ensure the stability and balance of the threaded valve stem 403, and prevent the deflection and deformation of the threaded valve stem 403. The lifting threaded sleeve 602 is the main regulating part of the gate valve. Through the threaded connection with the support frame 601 and the threaded valve stem 403, the opening of the gate valve can be adjusted to achieve flow control. The threaded connection between the lifting threaded sleeve 602 and the threaded valve stem 403 can make the threaded valve stem 403 move up and down along the lifting threaded sleeve 602, thereby changing the position of the gate mechanism 5 to achieve the purpose of opening and closing. The limit fixing plate 603 can limit the opening range of the gate valve to prevent the gate valve from being excessively opened or closed.

[0040] The handwheel mechanism 7 includes a handwheel pressure plate 701 and a handwheel outer ring 703. The middle part of the handwheel pressure plate 701 is slidingly connected to the upper end of the threaded valve stem 403. The outer edge of the handwheel pressure plate 701 is fixedly connected to multiple groups of connecting rods 702. The outer ends of the connecting rods 702 are fixedly connected to the inner surface of the handwheel outer ring 703. A clamping nut 704 is provided on the upper side of the handwheel pressure plate 701. The inner surface of the clamping nut 704 is threadedly connected to the upper end of the threaded valve stem 403.

[0041] The handwheel mechanism 7 is the main driving device of the gate valve. By manually rotating the handwheel outer ring 703, the handwheel pressure plate 701 and the connecting rod 702 can be rotated together, thereby driving the rotation of the threaded valve stem 403 to achieve the opening and closing of the gate valve. The clamping nut 704 is the main fastener of the handwheel mechanism 7. By tightening or loosening the clamping nut 704, the handwheel mechanism 7 can be installed or removed from the device.

[0042] The warning mechanism 8 includes a warning box 801, an LED warning light 802, and a trigger pressure rod 803. The upper side of the warning box 801 is fixedly connected to the upper lower surface of the support frame 601, the left side of the warning box 801 is fixedly connected to the right side of the LED warning light 802, and a trigger pressure rod 803 is provided on the upper right surface of the warning box 801. The upper end of the trigger pressure rod 803 passes through the support frame 601 and the limit fixing plate 603 and contacts with the lower surface of the handwheel pressure plate 701.

[0043] The LED warning light 802 is the main display part of the gate valve, which can display the switch status of the gate valve, and is convenient for operators to observe and control. When the gate valve is in a fully closed state, the LED warning light 802 goes out, indicating that the gate valve has been fully closed. When the gate valve is not fully closed, the LED warning light 802 lights up, indicating that the gate valve is not fully closed. The trigger pressure rod 803 is the main control part of the gate valve, which can control the switch of the LED warning light 802 to realize the automatic warning of the gate valve. When the gate valve is in a fully closed state, the lower surface of the handwheel pressure plate 701 presses the upper end of the trigger pressure rod 803, so that the trigger pressure rod 803 moves downward, unlocks the switch in the warning box 801, and turns off the LED warning light 802. When the gate valve is not fully closed, the lower surface of the handwheel pressure plate 701 leaves the upper end of the trigger pressure rod 803, so that the trigger pressure rod 803 rebounds upward, triggering the switch in the warning box 801, and the LED warning light 802 lights up to send a warning signal.

[0044] Working principle: The internal structure of the valve is made of rubber lining materials, such as the inner lining rubber ring 2, the gate outer lining rubber layer 502 and the internal filling rubber layer 9, which can effectively isolate the contact between the medium and the metal parts of the valve, improve the corrosion resistance and sealing of the valve, and extend the service life of the valve;

[0045] The gate mechanism 5 of the valve adopts a parallel gate structure, and the upper side of the gate body 501 is rotatably connected to the lower end of the threaded valve stem 403, which can realize the rapid opening and closing of the valve, reduce the operation time and wear of the valve, and improve the working efficiency and reliability of the valve;

[0046] When the gate valve needs to be closed, the operator rotates the handwheel mechanism 7 to make the handwheel pressure plate 701 and the connecting rod 702 drive the threaded valve stem 403 to rotate downward. The threaded valve stem 403 is connected with the lifting threaded sleeve 602 by thread, and the rotation torque is converted into a downward torque, so that the gate body 501 moves downward until the gate outer lining rubber layer 502 is in close contact with the inner surface of the inner lining rubber ring 2, forming a seal to prevent the flow of the medium. At this time, the LED warning light 802 goes out, indicating that the gate valve has been fully closed;

[0047] When the gate valve needs to be opened, the operator rotates the handwheel mechanism 7 in the opposite direction, so that the handwheel pressure plate 701 and the connecting rod 702 drive the threaded valve stem 403 to rotate upward. The threaded valve stem 403 is connected with the lifting threaded sleeve 602 by thread, and the rotation torque is converted into an upward torque, so that the gate body 501 moves upward along the center line of the valve body 1 until it is separated from the inner surface of the lining rubber ring 2, forming a channel to allow the flow of the medium. At this time, the LED warning light 802 lights up, indicating that the gate valve has been opened, and the LED warning light 802 reminds the staff that the gate valve is not closed, so as to avoid leakage accidents caused by the staff forgetting to close or not closing it properly.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A rubber lined gate valve, comprising a valve body (1), characterized in that: The inner surface of the valve body (1) is fixedly connected to an inner lining rubber ring (2); the upper outer surface of the middle part of the valve body (1) is fixedly connected to an upper valve body mechanism (3); the middle part of the upper valve body mechanism (3) is fixedly connected to a valve stem mechanism (4); the lower side of the valve stem mechanism (4) is rotatably connected to a gate mechanism (5); the gate mechanism (5) moves inside the valve body (1) and the upper valve body mechanism (3); the upper side of the upper valve body mechanism (3) is fixedly connected to a lifting mechanism (6); the inner surface of the lifting mechanism (6) is threadedly connected to the upper outer surface of the valve stem mechanism (4); the upper end of the valve stem mechanism (4) is fixedly connected to a handwheel mechanism (7); the lower side of the handwheel mechanism (7) is provided with a warning mechanism (8); the left and right ends of the valve body (1) are fixedly connected to flange connection rings (11); and the flange connection rings (11) are provided with a plurality of mounting holes (12).

2. A rubber lined gate valve according to claim 1, characterized in that: The upper valve body mechanism (3) comprises a gate plate activity chamber (301) and a fixed plate (302); the lower side of the gate plate activity chamber (301) is fixedly connected to the outer surface of the middle upper side of the valve body (1); the upper side of the gate plate activity chamber (301) is fixedly connected to the lower side of the fixed plate (302); an upper sealing plate (303) is provided on the upper side of the fixed plate (302); the fixed plate (302) and the upper sealing plate (303) are fixedly connected to each other via sealing bolts (304).

3. The rubber lined gate valve according to claim 1, characterized in that: The valve stem mechanism (4) comprises a sealing sleeve (401), a sealing pressure ring (402), and a threaded valve stem (403); the sealing sleeve (401) is fixedly connected to the middle part of the upper sealing plate (303); the sealing pressure ring (402) is fixedly connected to the upper side of the sealing sleeve (401); and the middle outer surface of the threaded valve stem (403) is slidably connected to the inner surfaces of the sealing sleeve (401) and the sealing pressure ring (402).

4. The rubber lined gate valve according to claim 1, characterized in that: The gate mechanism (5) comprises a gate body (501) and a gate outer rubber lining layer (502); the upper side of the gate body (501) is rotatably connected to the lower end of the threaded valve stem (403); the outer surface of the gate body (501) is fixedly connected to the inner surface of the gate body (501); the outer edge of the gate outer rubber lining layer (502) is fixedly connected to multiple groups of gate outer edge rubber rings (503); the outer edge of the gate outer rubber lining layer (502) and the outer surface of the gate outer edge rubber ring (503) are both in close contact with the inner surface of the inner lining rubber ring (2).

5. The rubber lined gate valve according to claim 1, characterized in that: The lifting mechanism (6) comprises a support frame (601) and a lifting threaded sleeve (602); the lower side of the support frame (601) is fixedly connected to the upper surface of the upper sealing plate (303); the middle part of the upper side of the support frame (601) is fixedly connected to the outer surface of the lifting threaded sleeve (602); the inner surface of the lifting threaded sleeve (602) is threadedly connected to the upper outer surface of the threaded valve stem (403); the upper side of the lifting threaded sleeve (602) is fixedly connected to a limiting fixing plate (603); the middle outer surface of the limiting fixing plate (603) is slidably connected to the upper outer surface of the threaded valve stem (403).

6. The rubber lined gate valve according to claim 1, characterized in that: The handwheel mechanism (7) comprises a handwheel pressure plate (701) and a handwheel outer ring (703); the middle portion of the handwheel pressure plate (701) is slidably connected to the upper end of the threaded valve stem (403); the outer edge of the handwheel pressure plate (701) is fixedly connected to a plurality of connecting rods (702); the outer ends of the connecting rods (702) are fixedly connected to the inner surface of the handwheel outer ring (703); a clamping nut (704) is provided on the upper side of the handwheel pressure plate (701); the inner surface of the clamping nut (704) is threadedly connected to the upper end of the threaded valve stem (403).

7. The rubber lined gate valve according to claim 1, characterized in that: The warning mechanism (8) comprises a warning box (801), an LED warning light (802), and a trigger pressure rod (803); the upper side of the warning box (801) is fixedly connected to the upper lower surface of the support frame (601); the left side of the warning box (801) is fixedly connected to the right side of the LED warning light (802); a trigger pressure rod (803) is provided on the upper right surface of the warning box (801); the upper end of the trigger pressure rod (803) penetrates the support frame (601) and the limit fixing plate (603) and contacts the lower surface of the hand wheel pressure plate (701).

8. The rubber lined gate valve according to claim 2, characterized in that: An internal filling rubber layer (9) is fixedly connected to the interior of the gate movable chamber (301), and a perforated filling rubber pad (10) is provided on the upper side of the internal filling rubber layer (9), and the inner surface of the perforated filling rubber pad (10) is slidably connected to the outer surface of the threaded valve stem (403).

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