Linkage fine adjustment valve

Abstract

The utility model discloses a kind of linkage type fine regulating valve, including valve body, sleeve, valve cover, support, valve stem, connecting block, valve core one, valve core two, packing group, gland and press plate, sleeve is installed in the valve body, the valve body upper end is fixedly connected with valve cover by bolt, the valve cover bottom end is pressed on sleeve, the valve cover upper end is fixedly connected with support by bolt, the support center is movably installed with valve stem, the valve stem bottom end is rotatably connected on connecting block, the connecting block bottom left and right two ends are rotatably connected with valve core one and valve core two respectively, the valve core one and valve core two bottom end respectively penetrate support and valve cover into sleeve, the valve cover upper end is located at valve core one and valve core two outer part and is respectively installed with packing group, the packing group upper end is installed with gland, and the gland is installed with press plate. The utility model is scientific and reasonable in structure, and good in use effect, low in manufacturing cost, and suitable for popularization and use.

Description

Technical Field

[0001] This utility model relates to regulating valves, specifically to a linkage-type precision regulating valve. Background Technology

[0002] Existing valves cannot achieve fine adjustment for operating conditions with large flow ranges. They often fail to adjust to the minimum flow after meeting the maximum flow, resulting in unsustainable use. Under long-term use at small openings, the sealing surface frequently suffers from cavitation and blow-out, leading to high maintenance costs and low production efficiency. To address this, we propose a linkage-type fine adjustment valve. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a linkage-type fine regulating valve, which solves the problem that existing valves cannot achieve fine regulation in working conditions with a large flow range. Often, after meeting the maximum flow rate, they cannot achieve the minimum flow rate regulation, resulting in unsustainable use. Under long-term use at small openings, the sealing surface frequently suffers from cavitation and blow-out, resulting in high maintenance costs and low production efficiency.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a linkage-type precision regulating valve, including a valve body, a sleeve, a valve cover, a bracket, a valve stem, a connecting block, a valve core one, a valve core two, a packing assembly, a gland, and a pressure plate. The sleeve is installed inside the valve body. The valve cover is bolted to the upper end of the valve body, and the bottom end of the valve cover is pressed against the sleeve. The bracket is bolted to the upper end of the valve cover. A valve stem is movably installed at the center of the bracket. The bottom end of the valve stem is rotatably connected to the connecting block. Valve core one and valve core two are rotatably connected to the left and right ends of the bottom of the connecting block, respectively. The bottom ends of valve core one and valve core two penetrate the bracket and the valve cover, respectively, and enter the sleeve. A packing assembly is installed on the upper end of the valve cover outside valve core one and valve core two, respectively. A gland is installed on the upper end of the packing assembly, and a pressure plate is installed on the gland. The pressure plate is fixedly connected to the bracket and presses against the gland.

[0005] Based on the above scheme, the connecting block and the bracket are in sliding fit, and the valve stem is in sliding fit with the bracket.

[0006] Based on the above scheme, valve core one and valve core two are respectively in sliding fit with sleeve, valve cover, packing assembly, gland and pressure plate.

[0007] Based on the above scheme, the valve core two includes a pull rod, a main valve core, a compression spring, a split ring, a locking nut, and an auxiliary valve core. The upper end of the pull rod is rotatably connected to the connecting block, and the bottom end of the pull rod is integrally provided with the main valve core. The bottom end of the main valve core has an installation cavity. The top of the cavity is equipped with a compression spring, and the bottom end of the compression spring is equipped with a split ring. The bottom of the split ring is equipped with a locking nut, which is threaded to the bottom end of the installation cavity and presses against the bottom end of the split ring. The center of the split ring and the locking nut is rotatably connected to the auxiliary valve core.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: A linkage-type precision regulating valve adopts a new structure and is equipped with a double valve core. The second valve core consists of a main valve core, an auxiliary valve core, a locking nut, a split ring, and a compression spring. This ensures that before the main valve core closes, the compression spring of the auxiliary valve core of the second valve core and the pressure of the medium close first, blocking the flow of the medium and protecting the main valve core from cavitation and erosion when it is closed. This double valve core regulation avoids the risk of valve core cavitation and erosion, greatly improves the regulating performance, and extends the service life of the valve. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of a linkage-type precision regulating valve according to this utility model;

[0010] Figure 2 This is a partial structural diagram of the sleeve of a linkage-type precision regulating valve according to this utility model.

[0011] The numbers in the diagram are: 1-valve body, 2-sleeve, 3-valve cover, 4-bracket, 5-valve stem, 6-connecting block, 7-valve core one, 8-valve core two, 801-pull rod, 802-main valve core, 803-compression spring, 804-split ring, 805-locking nut, 806-auxiliary valve core, 9-packing assembly, 10-gland, 11-pressure plate. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0014] Reference Figures 1 to 2 It is known that a linkage-type precision regulating valve includes a valve body 1, a sleeve 2, a valve cover 3, a bracket 4, a valve stem 5, a connecting block 6, a valve core 1 7, a valve core 2 8, a packing assembly 9, a gland 10, and a pressure plate 11. The sleeve 2 is installed inside the valve body 1. The valve cover 3 is bolted to the upper end of the valve body 1. The bottom end of the valve cover 3 is pressed against the sleeve 2. The bracket 4 is bolted to the upper end of the valve cover 3. The valve stem 5 is movably mounted at the center of the bracket 4. The bottom end of the valve stem 5 is rotatably connected to the connecting block 6. The bottom left and right ends of the connecting block 6 are respectively rotatably connected to valve core 1 7 and valve core 2 8. The bottom ends of valve core 1 7 and valve core 2 8 pass through the bracket 4 and valve cover 3 and enter the sleeve 2. The upper end of the valve cover 3 is located outside valve core 1 7 and valve core 2 8 and is respectively equipped with packing group 9. The upper end of the packing group 9 is equipped with pressure cap 10. Pressure plate 11 is installed on pressure cap 10. Pressure plate 11 is fixedly connected to the bracket 4 and presses the pressure cap 10. Pressure plate 11 can press and fix pressure cap 10 and packing group 9.

[0015] The connecting block 6 and the bracket 4 are slidably engaged, allowing the connecting block 6 to move up and down within the bracket 4. The valve stem 5 is also slidably engaged with the bracket 4, allowing the valve stem 5 to move up and down within the bracket 4. The valve core 7 and valve core 8 are slidably engaged with the sleeve 2, valve cover 3, packing assembly 9, pressure cap 10, and pressure plate 11, respectively, allowing the valve core 7 and valve core 8 to move up and down. The valve core 8 includes a pull rod 801, a main valve core 802, a compression spring 803, a split ring 804, a locking nut 805, and an auxiliary valve core 806. The upper end of the pull rod 801 is rotatably connected to the connecting block 6, and the bottom end of the pull rod 801 is integrally provided with the main valve core 802. The main valve core 802 has an installation cavity at its bottom end. A compression spring 803 is installed at the top of the cavity, and a split ring 804 is installed at the bottom end of the compression spring 803. A locking nut 805 is provided at the bottom of the split ring 804. The locking nut 805 is threaded to the bottom end of the installation cavity and is pressed against the bottom end of the split ring 804. An auxiliary valve core 806 is rotatably connected to the center of the split ring 804 and the locking nut 805. The second valve core 8 can ensure that before the valve core closes, the pressure of the auxiliary valve core 806, the compression spring 803 and the medium is closed first, blocking the flow of the medium and protecting the first valve core 7 from cavitation and erosion when it is closed.

[0016] The principle and advantages of this utility model: A linkage-type fine regulating valve adopts a new structure with dual valve cores. When valve core 7 is open, valve core 8 is not yet open, protecting the sealing surface of valve core 7 from cavitation. After valve core 7 is opened above the cavitation critical point, valve core 8 is opened simultaneously for fine adjustment. After the opening degree is increased by 30%, valve core 8 disengages from adjustment, and valve core 7 is switched to perform large flow regulation. Valve core 8 consists of a main valve core 802, an auxiliary valve core 806, a locking nut 805, a split ring 804, and a compression spring 806. The three-component design ensures that before the main valve core 8 closes, the auxiliary valve core 806, compression spring 803, and the pressure of the medium in the secondary valve core 8 are closed first, blocking the flow of the medium and protecting the primary valve core 7 from cavitation and erosion when it closes. This dual-valve core regulation avoids the risk of valve core cavitation and erosion, greatly improving regulation performance and extending the service life of the valve. Based on the original valve's ability to only regulate one flow rate, this design enables simultaneous regulation of small and large flow rates. The structure of this utility model is scientific and reasonable, with good performance and low manufacturing cost, making it suitable for widespread use.

[0017] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A linkage-type precision regulating valve, comprising a valve body (1), a sleeve (2), a valve cover (3), a bracket (4), a valve stem (5), a connecting block (6), a first valve core (7), a second valve core (8), a packing assembly (9), a gland (10), and a pressure plate (11), characterized in that: A sleeve (2) is installed inside the valve body (1). A valve cover (3) is fixedly connected to the upper end of the valve body (1) by bolts. The bottom end of the valve cover (3) is pressed against the sleeve (2). A bracket (4) is fixedly connected to the upper end of the valve cover (3) by bolts. A valve stem (5) is movably installed in the center of the bracket (4). The bottom end of the valve stem (5) is rotatably connected to the connecting block (6). A valve core one (7) and a valve core two (8) are rotatably connected to the left and right ends of the bottom of the connecting block (6) respectively. The bottom ends of valve core one (7) and valve core two (8) pass through the bracket (4) and valve cover (3) respectively and enter the sleeve (2). The upper end of the valve cover (3) is located outside the valve core one (7) and valve core two (8) and is respectively equipped with packing group (9). The upper end of the packing group (9) is equipped with pressure cap (10). Pressure plate (11) is installed on the pressure cap (10). The pressure plate (11) is fixedly connected to the bracket (4) and the pressure plate (11) is pressed on the pressure cap (10).

2. The linkage-type precision regulating valve according to claim 1, characterized in that, The connecting block (6) and the bracket (4) are in sliding engagement, and the valve stem (5) and the bracket (4) are in sliding engagement.

3. The linkage-type precision regulating valve according to claim 1, characterized in that, The valve core one (7) and valve core two (8) are respectively in sliding fit with the sleeve (2), valve cover (3), packing group (9), gland (10) and pressure plate (11).

4. The linkage-type precision regulating valve according to claim 1, characterized in that, The valve core 2 (8) includes a pull rod (801), a main valve core (802), a compression spring (803), a split ring (804), a locking nut (805), and an auxiliary valve core (806). The upper end of the pull rod (801) is rotatably connected to the connecting block (6). The bottom end of the pull rod (801) is integrally provided with the main valve core (802). The bottom end of the main valve core (802) is provided with an installation cavity. The top of the cavity is equipped with a compression spring (803). The bottom end of the compression spring (803) is equipped with a split ring (804). The bottom of the split ring (804) is provided with a locking nut (805). The locking nut (805) is threadedly connected to the bottom end of the installation cavity and is pressed against the bottom end of the split ring (804). The center of the split ring (804) and the locking nut (805) is rotatably connected to the auxiliary valve core (806).

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