Gate valve with anti-locking function

Abstract

The utility model discloses a sluice valve with an anti-locking function, and particularly relates to the technical field of sluice valves, the sluice valve comprises a sluice valve body, a hollow cavity, an electric heating wire and a wire slip ring, the upper end of the sluice valve body is provided with a connecting seat, the upper end of the connecting seat is provided with a valve cover, the upper end of the valve cover is provided with a limiting support, and an inner cavity of the limiting support is provided with a valve rod; the hollow cavity is formed in the center of an inner cavity of the valve rod, the electric heating wire is installed in an inner cavity of the hollow cavity, a wire sliding ring is installed in the center of the upper end of the rotating hand wheel, and a gate plate is installed at the bottom of the valve rod. The hollow cavity and the electric heating wire are arranged, the electric heating wire can continuously and stably obtain electric energy in the rotating process of the valve rod through the wire sliding ring, generated heat can be evenly transmitted to the whole rod body from the inside, the whole valve rod is kept at a certain temperature, the valve rod is prevented from being frozen, and the service life of the valve rod is prolonged. Normal opening and closing operation of the valve can be guaranteed, and the situation that the valve is stuck or cannot work normally due to freezing is avoided.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, and more specifically, to a gate valve with anti-jamming function. Background Technology

[0002] Knife gate valves, also known as knife gate valves, have been rapidly adopted in various industries due to their low flow resistance, light weight, and ease of installation and disassembly. Knife gate valves use a gate plate perpendicular to the fluid direction to open and close to cut off the medium. Currently, the commonly used opening and closing drive methods are mainly handwheel drive, electric type and pneumatic type.

[0003] A search revealed that patent publication number CN210218722U discloses an anti-jamming gate valve, comprising a valve body with a channel inside. An adjusting groove is formed on the upper side wall of the channel. Two valve seats are connected to the upper side wall of the valve body via a fixing device. Both valve seats are semi-circular, and their horizontal sides abut against each other. By loosening the nuts on the connecting plates on both sides of the valve seats, the fastening bolts can be removed from the connecting plates. Then, the fixing bolts are loosened, and the fixing bolts are removed from the valve body and valve seats. The two abutting valve seats can be pried apart by hand, allowing the valve seats to be removed from the valve stem. This facilitates cleaning and replacement of the valve stem, preventing the valve stem from jamming inside the valve seat due to rust, thus advancing the working process. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing gate valves are often used in cold regions or some low-temperature industrial environments where the ambient temperature is lower than the freezing point of the medium or the freezing point of water. In winter, in outdoor pipeline systems or some low-temperature cold storage warehouses, freezing workshops, etc., the surface temperature of the valve stem is low, and water vapor easily condenses into water droplets on its surface. When the temperature drops further, these water droplets will freeze, causing the valve stem to freeze and the gate valve to jam.

[0005] Therefore, a gate valve with anti-jamming function is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a gate valve with anti-jamming function to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a gate valve with anti-jamming function, comprising a gate valve body, a hollow chamber, an electric heating wire and a wire slip ring, wherein a valve seat is provided in the inner cavity of the gate valve body, a connecting seat is provided at the upper end of the gate valve body, a valve cover is installed at the upper end of the connecting seat, a limit bracket is provided at the upper end of the valve cover, and a valve stem is installed in the inner cavity of the limit bracket;

[0008] The hollow chamber is located at the center of the valve stem cavity. The electric heating wire is installed in the hollow chamber cavity. A rotating handwheel is installed at the upper end of the valve stem. A wire slip ring is installed at the center of the upper end of the rotating handwheel. A gate is installed at the bottom of the valve stem. A pressure cap is installed on the outer surface of the valve stem.

[0009] Preferably, the wire slip ring is electrically connected to the electric heating wire, and the wire slip ring is connected to the rotating handwheel by bolts.

[0010] Preferably, the connecting seat and the valve cover are connected to each other by bolts, and a sealing ring is installed at the connection between the connecting seat and the valve cover.

[0011] Preferably, a packing material is installed at the center of the inner cavity of the valve cover, and the packing material is provided in several groups, which are stacked on top of each other. The gland is embedded in the center of the upper end of the valve cover for fixation.

[0012] Preferably, the upper end of the valve stem is connected to the rotating handwheel, and the outer surface of the upper end of the valve stem is threaded.

[0013] Preferably, the valve stem passes through the inner cavity of the limiting bracket, the pressure cap, the valve cover, the connecting seat, and the gate valve body in sequence, and the valve stem is movably connected to the gate plate through a rotating shaft.

[0014] Preferably, both ends of the gate valve body are provided with connecting flanges, and each set of connecting flanges has mounting holes on its surface.

[0015] Preferably, the mounting holes are arranged at equal intervals, and the connecting flanges are symmetrically arranged.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. Compared with the existing technology, this gate valve with anti-jamming function has a hollow chamber and an electric heating wire. By using a wire slip ring, the electric heating wire can continuously and stably obtain electrical energy during the rotation of the valve stem. This allows the generated heat to be evenly transferred from the inside to the entire stem, keeping the entire valve stem at a certain temperature and preventing it from freezing. This helps to ensure the normal opening and closing operation of the valve and avoids the valve jamming or failure to work properly due to freezing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0019] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure at point A in the diagram.

[0020] Figure 3 This is a three-dimensional structural diagram of the connecting flange of this utility model.

[0021] Figure 4 This is a three-dimensional structural diagram of the valve stem cross-section of this utility model.

[0022] The attached figures are labeled as follows: 1. Gate valve body; 2. Valve seat; 3. Connecting seat; 4. Valve cover; 41. Packing; 5. Limiting bracket; 6. Rotating handwheel; 7. Valve stem; 8. Hollow chamber; 9. Electric heating wire; 10. Wire slip ring; 11. Gate; 12. Gland; 13. Connecting flange; 14. Mounting hole; 15. Sealing ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] As attached Figures 1 to 4 The gate valve shown includes a gate valve body 1, a hollow chamber 8, an electric heating wire 9, and a wire slip ring 10. The gate valve body 1 is the main supporting structure of the gate valve, providing a mounting base for other components. The valve seat 2 inside provides a sealing fit with the gate 11, ensuring that the flow of medium is cut off when the gate valve is closed, thus achieving on / off control of the pipeline system. Both ends of the gate valve body 1 are easily connected to pipelines. The valve seat 2 is located in the inner cavity of the gate valve body 1. The valve seat 2 is crucial for the gate valve's sealing; when it fits tightly with the gate 11, it effectively prevents medium leakage, ensuring the sealing performance of the gate valve and accurately controlling the flow of medium. A connecting seat 3 is provided at the upper end of the gate valve body 1, connecting the gate valve body 1 and the valve cover 4, forming a stable whole and enhancing the stability of the gate valve. Qualitatively, a valve cover 4 is installed on the upper end of the connecting seat 3. The valve cover 4 seals the upper end of the gate valve body 1, protecting the internal components from external dust, moisture, etc. The packing 41 in its inner cavity is in close contact with the valve stem 7 to prevent the medium from leaking along the valve stem 7. At the same time, it provides support and guidance for the valve stem 7. A limit bracket 5 is set on the upper end of the valve cover 4. The limit bracket 5 limits and guides the valve stem 7, ensuring that the valve stem 7 can only make linear movements within a specified range, making the lifting and lowering of the gate 11 more accurate. The valve stem 7 is installed in the inner cavity of the limit bracket 5. The valve stem 7 is a key component connecting the rotating handwheel 6 and the gate 11. It converts the rotational motion of the rotating handwheel 6 into the linear motion of the gate 11, realizing the opening and closing action of the gate valve, and operating stably under the support and guidance of the valve cover 4 and other components.

[0026] A hollow chamber 8 is located at the center of the valve stem 7's inner cavity, providing installation space for the electric heating wire 9. This allows the heat generated by the heating wire 9 to be evenly transferred to the valve stem 7 from the inside, effectively preventing the valve stem 7 from freezing and ensuring the gate valve operates normally in low-temperature environments. The electric heating wire 9 is installed inside the hollow chamber 8. When energized, it generates heat to heat the valve stem 7 from the inside, preventing it from freezing due to low temperatures. A rotating handwheel 6 is installed at the upper end of the valve stem 7, and a wire slip ring 10 is installed at the center of the upper end of the rotating handwheel 6. 10 is installed at the center of the upper end of the rotating handwheel 6 and is electrically connected to the electric heating wire 9 to ensure that the electric heating wire 9 can be continuously powered during the rotation of the valve stem 7, thus ensuring stable operation of the heating function. A gate 11 is installed at the bottom of the valve stem 7. The gate 11 is a key actuator of the gate valve. It moves up and down with the valve stem 7 and can be tightly engaged or disengaged from the valve seat 2 to realize the closing and opening of the gate valve and control the flow of the medium. A gland 12 is installed on the outer surface of the valve stem 7. The gland 12 presses the packing 41 in the valve cover 4 to ensure that the packing 41 is in close contact with the valve stem 7, further enhancing the sealing effect and preventing medium leakage.

[0027] Example 2

[0028] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0029] In a preferred embodiment, the wire slip ring 10 and the electric heating wire 9 are electrically connected. During the rotation of the valve stem, the electric heating wire 9 always maintains a stable energized state. Since the valve 7 needs to be rotated frequently to control the raising and lowering of the gate plate 11 when the gate valve is working, ordinary fixed connection methods are prone to wire tangling and breakage. However, the wire slip ring 10 can achieve stable current transmission, ensuring that the electric heating wire 9 continuously generates heat, effectively preventing the valve stem 7 from freezing due to low temperature, and ensuring that the gate valve can work normally under various environmental conditions, especially in low temperature environments. The wire slip ring 10 is connected to the rotating handwheel 6 by bolts.

[0030] In a preferred embodiment, the connecting seat 3 and the valve cover 4 are connected to each other by bolts. The bolt connection can provide a strong fastening force, so that the connecting seat 3 and the valve cover 4 are tightly connected together, and can withstand the pressure of the internal medium when the gate valve is working and the possible external impact force. A sealing ring 15 is installed at the connection between the connecting seat 3 and the valve cover 4. The sealing ring 15 can fill the small gap between the connecting seat 3 and the valve cover 4, and prevent the medium in the gate valve from leaking from the connection. No matter how high the medium pressure is when the gate valve is closed, the sealing ring 15 can effectively maintain the seal and prevent the medium from leaking into the external environment.

[0031] In a preferred embodiment, packing 41 is installed at the center of the inner cavity of the valve cover 4. Several sets of packing 41 are provided. The main function of packing 41 is to seal the gap between the valve stem 7 and the valve cover 4, preventing the medium inside the gate valve from leaking to the outside along the valve stem 7. Multiple sets of stacked packing 41 can form a multi-layer sealing structure, increasing the resistance to medium leakage, improving sealing performance, and ensuring that medium leakage can be effectively prevented under different working pressure and temperature conditions. Several sets of packing 41 are stacked on each other, and the gland 12 is embedded in the center of the upper end of the valve cover 4 for fixation. The gland 12 is embedded in the center of the upper end of the valve cover 4 for fixation, which can apply uniform pressure to the packing 41, so that the packing 41 is tightly filled in the gap between the valve stem 7 and the valve cover 4. By adjusting the tightness of the gland 12, it can be ensured that the packing 41 always maintains good sealing performance and prevents leakage caused by the packing 41 loosening.

[0032] In a preferred embodiment, the upper end of the valve stem 7 is connected to the rotating handwheel 6. The outer surface of the upper end of the valve stem 7 is threaded. When the rotating handwheel 6 drives the valve stem 7 to rotate, the threaded structure can accurately convert the rotational motion of the rotating handwheel 6 into the linear lifting motion of the valve stem 7, thereby accurately controlling the opening and closing degree of the gate 11 and realizing precise regulation of fluid flow.

[0033] In a preferred embodiment, the stem 7 passes through the inner cavity of the limiting bracket 5, the pressure cap 12, the valve cover 4, the connecting seat 3, and the gate valve body 1 in sequence. This ensures the coaxiality and stability of the entire gate valve structure. The stem 7 is movably connected to the gate plate 11 via a rotating shaft. This rotating shaft connection allows the gate plate 11 to rotate flexibly relative to the stem 7, converting the rotation of the stem 7 into linear motion.

[0034] In a preferred embodiment, both ends of the gate valve body 1 are provided with connecting flanges 13, and each set of connecting flanges 13 has mounting holes 14 on its surface. The mounting holes 14 on the connecting flanges 13 can be connected to the flanges by bolts, so that the gate valve can be conveniently and quickly installed on the pipeline.

[0035] In a preferred embodiment, several sets of mounting holes 14 are arranged at equal intervals. The equally spaced mounting holes 14 enable the bolts to be evenly distributed around the flange circumference during connection. When the bolts are tightened, the pressure between the gate valve body 1 and the pipeline or other connecting equipment can be evenly distributed. The symmetrical arrangement of the connecting flanges 13 makes the force on the pipeline more balanced in all directions.

[0036] The working process of this utility model is as follows: First, adjust the rotating handwheel 6. Since the outer surface of the upper end of the valve stem 7 is threaded, the rotational motion of the rotating handwheel 6 is converted into the linear lifting motion of the valve stem 7 through the thread. The valve stem 7 drives the bottom gate plate 11 to move up and down. When the gate plate 11 is separated from the valve seat 2, the gate valve opens and the medium can flow in the inner cavity of the valve body 1. When the gate plate 11 is tightly fitted with the valve seat 2, the gate valve closes, cuts off the flow of medium, and realizes the on-off control of the pipeline system. The packing 41 in the inner cavity of the valve cover 4 is provided in several groups and stacked on each other. The pressure cap 12 is embedded in the center of the upper end of the valve cover 4 and fixed. The packing 41 is subjected to uniform pressure, so that the packing 41 is tightly filled in the gap between the valve stem 7 and the valve cover 4, forming a multi-layer sealing structure to prevent the medium in the gate valve from leaking to the outside along the valve stem 7. A sealing ring 15 is installed between the connecting seat 3 and the valve cover 4 to fill the small gap between them and prevent the medium in the gate valve from leaking from the connection.

[0037] The limiting bracket 5 limits and guides the valve stem 7, ensuring that the valve stem 7 can only move linearly within a specified range, making the raising and lowering of the gate 11 more accurate and ensuring the precise opening and closing of the gate valve. The valve stem 7 passes through the limiting bracket 5, the gland 12, the valve cover 4, the connecting seat 3, and the inner cavity of the gate valve body 1 in sequence, ensuring the coaxiality and stability of the entire gate valve structure. The hollow chamber 8 is opened at the center of the inner cavity of the valve stem 7, and the electric heating wire 9 is installed in the hollow chamber 8. The wire slip ring 10 is installed at the center of the upper end of the rotating handwheel 6 and is electrically connected to the electric heating wire 9. During the rotation of the valve stem 7, the wire slip ring 10 ensures that the electric heating wire 9 always maintains a stable energized state. The heat generated by the electric heating wire 9 is evenly transferred from the inside to the valve stem 7, effectively preventing the valve stem 7 from freezing due to low temperature and ensuring that the gate valve can work normally in low temperature environments. The connecting flanges 13 at both ends of the gate valve body 1 have mounting holes 14, which are connected to the corresponding flanges by bolts, making it convenient to install the gate valve onto the pipeline. Several sets of mounting holes 14 The valves are arranged at equal intervals to ensure that the pressure between the valve body 1 and the pipeline or other connecting equipment is evenly distributed when bolted. This is the working principle of a gate valve with anti-jamming function.

Claims

1. A gate valve with anti-stuck function, comprising a gate valve body (1), a hollow chamber (8), an electric heating wire (9) and a wire slip ring (10), characterized in that: The inner cavity of the gate valve body (1) is provided with a valve seat (2), the upper end of the gate valve body (1) is provided with a connecting seat (3), the upper end of the connecting seat (3) is installed with a valve cover (4), the upper end of the valve cover (4) is provided with a limiting support (5), the inner cavity of the limiting support (5) is installed with a valve rod (7); The hollow chamber (8) is arranged at the center of the inner cavity of the valve rod (7), the electric heating wire (9) is installed in the inner cavity of the hollow chamber (8), the upper end of the valve rod (7) is installed with a rotating hand wheel (6), the center of the upper end of the rotating hand wheel (6) is installed with a wire slip ring (10), the bottom of the valve rod (7) is installed with a gate plate (11), the outer surface of the valve rod (7) is installed with a gland (12).

2. The gate valve with anti-stuck function according to claim 1, characterized in that: The wire slip ring (10) and the electric heating wire (9) are electrically connected, the wire slip ring (10) is connected with the rotating hand wheel (6) through bolts.

3. The gate valve with anti-stuck function according to claim 1, characterized in that: The connecting seat (3) and the valve cover (4) are connected through bolts, and a sealing ring (15) is installed at the connection between the connecting seat (3) and the valve cover (4).

4. The gate valve with anti-stuck function according to claim 1, characterized in that: The center of the inner cavity of the valve cover (4) is installed with a filler (41), the filler (41) is provided with a plurality of groups, and the plurality of groups of fillers (41) are stacked with each other, and the gland (12) is embedded in the center of the upper end of the valve cover (4) for fixation.

5. The gate valve with anti-stuck function according to claim 1, characterized in that: The upper end of the valve rod (7) is connected with the rotating hand wheel (6), and the outer surface of the upper end of the valve rod (7) is in a threaded form.

6. The gate valve with anti-stuck function according to claim 1, characterized in that: The rod body of the valve rod (7) penetrates the limiting support (5), the gland (12), the valve cover (4), the connecting seat (3) and the inner cavity of the gate valve body (1) in sequence, and the valve rod (7) is movably connected with the gate plate (11) through a rotating shaft.

7. The gate valve with anti-stuck function according to claim 1, characterized in that: Both ends of the gate valve body (1) are provided with connecting flanges (13), and the surface of each group of connecting flanges (13) is provided with mounting holes (14).

8. The gate valve with anti-stuck function according to claim 7, characterized in that: A plurality of groups of mounting holes (14) are arranged in an equidistant spacing manner, and the connecting flanges (13) are symmetrically arranged.

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