Multi-sealing leakproof gate valve
By employing a dual-sealing structure and water pressure adaptive design, the processing difficulty and leakage problems of wedge-type single-plate hard-seal gate valves have been solved, achieving stable and reliable sealing between the gate and the sealing block, adapting to high-pressure conditions, and reducing processing difficulty and leakage risk.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-24
AI Technical Summary
In wedge-type single-plate hard-seal gate valves, the rigid fit between the sealing surfaces of the gate and the valve seat makes processing difficult, prone to jamming and scratching, and poses a high risk of leakage.
It adopts a double sealing structure, with a hard seal between the gate and the sealing block, and a soft seal between the rubber sealing ring and the gate. Combined with the design of the limiting protrusion and the hollow expansion cavity, it realizes the sliding fit between the gate and the sealing block and utilizes water pressure self-adaptive sealing.
It reduces the precision requirements for gate machining, avoids scratches, improves sealing effect and the safety and stability of fluid transportation, adapts to high-pressure conditions, has wider applicability, and has stronger sealing structure reliability.
Smart Images
Figure CN224033126U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of gate valve, especially to a multiple sealing leakproof gate valve. BACKGROUND
[0002] The wedge type single plate hard sealing gate valve is mainly composed of a valve body, a valve cover, a valve rod, a gate plate, a valve seat and the like. The rotation of the valve rod drives the gate plate to move up and down along the wedge-shaped sealing surface of the valve seat. When the gate plate is lowered to the bottom of the valve seat, the gate plate is tightly attached to the sealing surface of the valve seat to achieve sealing and prevent the medium from flowing through. When the gate plate is raised to leave the valve seat, the flow passage is opened and the medium can flow freely. In the wedge type single plate hard sealing gate valve, the gate plate and the sealing surface of the valve seat are hard sealed, which requires high precision between the sealing surface of the gate plate and the valve seat. The gate plate and the sealing surface should be completely attached. However, due to the precision problem, the gate plate and the valve seat are often tightly attached in an interference fit state. Although this can effectively prevent leakage, it is difficult to process and maintain, and the gate plate is prone to be tightly clamped and scratched.
[0003] To solve the above problems, the utility model provides a gate valve which can reinforce the sealing between the gate plate and the valve seat without interference fit between the gate plate and the sealing surface. CONTENT OF THE UTILITY MODEL
[0004] Therefore, to solve the above problems, the utility model provides a multiple sealing leakproof gate valve to solve the problem of easy clamping and scratching of the gate plate.
[0005] To solve the above technical problems, the utility model adopts the following solution: a multiple sealing leakproof gate valve, which comprises a valve body, a valve cover, a valve rod, a gate plate, a valve seat and a valve rod driving member. The valve seat is composed of two sealing blocks. The two sealing blocks are inclinedly fixed to the inner wall of the water passage of the valve body on both sides of the gate plate. The mating surfaces between the gate plate and the two sealing blocks are in close sliding fit. The mating surface of the sealing block on the water inlet side is provided with an annular mounting groove from outside to inside. A plurality of mounting channels are provided in the bottom surface of the mounting groove along the vertical direction. A rubber sealing ring is movably arranged in the mounting groove. The thickness of the rubber sealing ring is smaller than the depth of the mounting groove. A plurality of mounting columns are integrally arranged on the bottom of the rubber sealing ring. The mounting columns are inserted into the mounting channels in a sliding manner. Limiting protrusions are arranged on the free ends of the mounting columns and have a larger outer diameter than the inner diameter of the mounting channels. The length of the mounting columns is greater than the length of the mounting channels.
[0006] Further improvement: the rubber sealing ring is provided with a hollow expansion cavity. The mounting columns are provided with water inlet channels which are in communication with the hollow expansion cavity.
[0007] Further improvement: the two side surfaces of the rubber sealing ring are attached to the two side walls of the mounting groove.
[0008] Further improvement is that the inner diameter of the mounting channel is not greater than the groove width of the mounting groove.
[0009] Further improvement is that the outer surface of the mounting column and the inner wall of the mounting channel form a movable gap.
[0010] By adopting the foregoing technical scheme, the utility model has the beneficial effects that:
[0011] 1、Compared with the single hard sealing structure of the gate plate and the valve seat in the prior art, the utility model forms a double sealing structure through the hard sealing of the gate plate and the sealing block and the soft sealing of the rubber sealing ring and the gate plate, allows the sliding gap between the gate plate and the sealing block, avoids the occurrence of gate plate abrasion, reduces the cooperation precision between the gate plate and the sealing block, is favorable for reducing the machining precision of the gate plate, when the water pressure of the water inlet end increases when the gate valve is closed, the rubber sealing ring is tightly attached to the gate plate under the guidance of the water pressure and the mounting column, effectively hinders the leakage of the water body along the sliding gap of the cooperation surface of the gate plate and the sealing block, greatly improves the sealing effect, reduces the leakage risk, and guarantees the safety and stability of fluid conveying.
[0012] 2、The design of the limiting protrusion and the limiting boss stabilizes the position of the rubber sealing ring in the mounting groove, prevents it from being separated from the mounting groove under the impact of the water pressure, and guarantees the long-term stable operation of the sealing structure. The length of the mounting column is greater than the length of the mounting channel, which can well adapt to the expansion of the rubber sealing ring.
[0013] 3、The rubber sealing ring is internally provided with a hollow expansion cavity, and is communicated with the water inlet end through the water inlet channel in the mounting column. When the water pressure of the water inlet end of the gate valve increases, the water body enters the hollow expansion cavity to make the rubber sealing ring expand, which not only tightly abuts against the mounting groove, but also tightly abuts against the surface of the gate plate with greater pressure, realizing pressure self-adaptive sealing. This characteristic enables the gate valve to still maintain excellent sealing performance under high pressure working conditions, has a wider application range and higher reliability.
[0014] 4、The inner diameter of the mounting channel is not greater than the groove width of the mounting groove, a limiting boss is formed, which plays a precise positioning role when the rubber sealing ring is installed, the outer surface of the mounting column and the inner wall of the mounting channel form a movable gap, which reduces the sliding resistance of the rubber sealing ring, reduces the installation difficulty, effectively limits the deformation of the rubber sealing ring around the mounting column into the mounting channel, guarantees the structural integrity and sealing effect of the sealing ring. The sealing ring can quickly respond to the change of the water pressure after the gate valve is closed, quickly expands and abuts against the gate plate, improves the timeliness and reliability of the sealing action of the gate valve. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 is a front view structural schematic diagram of a multiple sealing anti-leakage gate valve according to an embodiment of the utility model.
[0016] Figure 2 is an internal structure schematic view of a multiple sealing anti-leakage gate valve according to an embodiment of the present application.
[0017] Figure 3 is an internal structure schematic view of a multiple sealing anti-leakage gate valve according to an embodiment of the present application.
[0018] Figure 4 is a front view structure schematic view of a valve seat in a multiple sealing anti-leakage gate valve according to an embodiment of the present application.
[0019] Figure 5 is a front view structure schematic view of a sealing ring in a multiple sealing anti-leakage gate valve according to an embodiment of the present application.
[0020] Figure 6 is a side view structure schematic view of a sealing ring in a multiple sealing anti-leakage gate valve according to an embodiment of the present application.
[0021] Figure 7 is Figure 2 a local structure enlarged view of A in the figure.
[0022] Figure 8 is Figure 3 a local structure enlarged view of C in the figure. DETAILED DESCRIPTION
[0023] The present application will be further described in conjunction with the drawings and specific embodiments.
[0024] Reference Figures 1 to 8The utility model discloses a multiple sealing leakproof gate valve, including valve body 10, valve cover 11, valve stem 12, gate 13, valve seat 14, valve stem drive part 15, valve cover 11 dismounts setting in the top of valve body 10, valve seat 14 fixed setting in the inside of valve body 10, the gate 13 lift glide setting in valve seat 14, the valve stem is set in the inside of valve body 10 with valve cover 11, the gate 13 rotatable setting in the lower end of valve stem, the valve stem top is connected with valve stem drive part 15 and is set up with the valve cover 11, valve seat 14 is by two circular sealing blocks 16, two sealing blocks 16 are located the inclined fixed in the water passage inner wall of valve body 10 of gate 13 both sides, the cooperation surface between gate 13 and two sealing blocks 16 is infinitely close glide cooperation, that is, the cooperation surface between gate 13 and sealing block 16 has glide gap, the cooperation surface of sealing block 16 at the water inlet side is opened with annular mounting groove 17 from outside to inside, the bottom surface of mounting groove 17 is opened with six installation channels 18 along the vertical bottom surface direction interval, rubber sealing ring 19 is movably arranged in mounting groove 17, the thickness of rubber sealing ring 19 is less than the depth of mounting groove 17, so that rubber sealing ring 19 can be hidden in mounting groove 17, six installation columns 20 are integrally arranged at the bottom of rubber sealing ring 19, the installation column 20 is inserted into the installation channel 18, the free end of installation column 20 is integrally provided with the limiting protrusion 21 with the outer diameter greater than the inner diameter of installation channel 18, and the limiting protrusion 21 is used to limit rubber sealing ring 19 from separating from mounting groove 17. The two side surfaces of rubber sealing ring 19 are attached to the two side walls of mounting groove 17 to increase the sealing property between rubber sealing ring 19 and mounting groove 17 and avoid water leakage through the gap between rubber sealing ring 19 and mounting groove 17. The length of installation column 20 is greater than the length of installation channel 18. When the gate valve is closed, the water pressure at the water inlet end increases, rubber sealing ring 19 moves to the surface of gate 13 under the guidance of installation column 20 and tightly contacts gate 13 under the action of water pressure, so that the water leakage along the glide gap between gate 13 and sealing block 16 is hindered, the sealing effect of gate 13 is improved under the double sealing of hard sealing of sealing block 16 and soft sealing of rubber sealing ring 19.
[0025] Further, the hollow expansion cavity 22 is arranged in the rubber sealing ring 19 to increase the deformation amount of rubber sealing ring 19, the water inlet channel 23 is arranged in the installation column 20 and communicates with the hollow expansion cavity 22, so that the water at the water inlet end enters the hollow expansion cavity 22 under water pressure to make rubber sealing ring 19 expand and tightly contact the surface of mounting groove 17 and gate 13, the sealing effect is improved, and the greater the water pressure at the water inlet end of the gate valve, the better the sealing effect.
[0026] Further, the inner diameter of the mounting channel 18 is not greater than the slot width of the mounting slot 17, so that the mounting channel 18 and the bottom of the mounting slot 17 form a limiting boss 24, facilitating the installation of the rubber sealing ring 19, and limiting the deformation of the rubber sealing ring 19 around the mounting column 20 into the mounting channel 18.
[0027] Further, the outer surface of the mounting column 20 and the inner wall of the mounting channel 18 form a movable gap facilitating the rubber sealing ring 19 to abut against the gate plate 13 under the pressure of the water inlet end of the gate valve, the movable gap reduces the sliding resistance of the mounting column 20, so that after the gate valve is closed, the rubber sealing ring 19 can quickly expand and abut against the gate plate 13.
[0028] The basic principle and main features of the utility model and its advantages are shown and described above, and those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and descriptions are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A multi-seal leak-proof gate valve, comprising a valve body, valve cover, valve stem, gate, valve seat, and valve stem drive component, characterized in that: The valve seat consists of two sealing blocks, which are located on both sides of the gate and fixed to the inner wall of the water passage of the valve body. The gate and the two sealing blocks slide in close contact with each other. The sealing block on the water inlet side has an annular mounting groove from the outside to the inside. The bottom surface of the mounting groove has several mounting channels spaced through it along the direction perpendicular to the bottom surface. A rubber sealing ring is movably installed in the mounting groove. The thickness of the rubber sealing ring is less than the depth of the mounting groove. Several mounting posts are integrally provided at the bottom of the rubber sealing ring. The mounting posts slide through and are inserted into the mounting channels. The free end of the mounting post has a limiting protrusion with an outer diameter greater than the inner diameter of the mounting channel. The length of the mounting post is greater than the length of the mounting channel.
2. The multi-seal leak-proof gate valve according to claim 1, characterized in that: The rubber sealing ring has a hollow expansion cavity inside, and the mounting column is provided with a water inlet channel that communicates with the hollow expansion cavity.
3. A multi-seal leak-proof gate valve according to claim 1 or 2, characterized in that: The two sides of the rubber sealing ring are fitted to the two side walls of the mounting groove.
4. A multi-seal leak-proof gate valve according to claim 1 or 2, characterized in that: The inner diameter of the installation channel is not greater than the width of the installation groove.
5. A multi-seal leak-proof gate valve according to claim 4, characterized in that: The outer surface of the mounting column forms an movable gap with the inner wall of the mounting channel.