High-temperature control valve

Abstract

The utility model relates to the technical field of valves, and discloses a high-temperature control valve which comprises a valve body, a valve seat is arranged in the middle of the valve body, and a guide rail is arranged on the valve body above the valve seat. The valve cover is mounted on the valve body and is positioned above the guide rail; the flashboard is arranged in the valve seat, a valve rod is installed at the upper end of the flashboard, and the valve rod upwards extends out of the valve cover; the driving assembly comprises a support, a hydraulic cylinder and a butt clamping block, the hydraulic cylinder is installed on the valve cover through the support, and a piston rod of the hydraulic cylinder is connected with the valve rod through the butt clamping block; the valve position sensing assembly comprises a connecting rod, a sensing piece and an inductive sensor, the first end of the connecting rod is connected to the outer wall of the butt clamping block, the second end of the connecting rod transversely extends out of the support to be connected with the sensing piece, and the inductive sensor is installed on the valve deck and is opposite to the sensing piece. And the distance between the inductive sensor and the induction sheet is less than or equal to 3mm. The control valve is suitable for a high-temperature fluid environment, and switching signals can be stably detected for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-temperature control valve. Background Art

[0002] Long-term operation of valves in high-temperature fluid environments can cause high internal temperatures, making sensors installed inside the valve susceptible to damage. Currently, valve on / off signals are detected by position sensors. When the valve switches between fully closed and fully open for extended periods, component wear can cause the distance between the sensor block and the sensor to exceed 3mm, affecting valve on / off signal detection. The sensor's internal location can also make debugging inconvenient. Alternatively, the sensor block and the sensor may directly contact, damaging the sensor and requiring frequent sensor replacement. Utility Model Content

[0003] The purpose of the utility model is to provide a high-temperature control valve, which is suitable for high-temperature fluid environments and can detect switch signals stably for a long time.

[0004] In order to achieve the above object, the utility model provides a high temperature control valve, comprising:

[0005] The valve body has a valve seat in the middle, and the valve body above the valve seat is provided with a guide rail;

[0006] a valve cover, mounted on the valve body and located above the guide rail;

[0007] a gate plate disposed in the valve seat, wherein a valve stem is mounted on the upper end of the gate plate, and the valve stem extends upward out of the valve cover;

[0008] a drive assembly comprising a bracket, a hydraulic cylinder and a clamping block, wherein the hydraulic cylinder is mounted on the valve cover via the bracket, and a piston rod of the hydraulic cylinder is connected to the valve stem via the clamping block; and

[0009] a sensing assembly comprising a connecting rod, a sensing sheet, and an inductive sensor, wherein a first end of the connecting rod is connected to an outer wall of the clamping block, a second end of the connecting rod extends laterally out of the bracket and is connected to the sensing sheet, and the inductive sensor is mounted on the valve cover and disposed opposite to the sensing sheet;

[0010] When the hydraulic cylinder drives the valve stem to move downward so that the gate plate enters the valve seat, the valve body is in a closed state. At this time, the distance between the inductive sensor and the sensing sheet is ≤3 mm.

[0011] In some embodiments, the gate has a wedge-shaped longitudinal section.

[0012] In some embodiments, a filler is filled between the valve cover and the valve stem, a pressure cover is provided on the outer periphery of the valve stem, and the pressure cover is installed on the valve cover.

[0013] In some embodiments, the induction sheet is an induction aluminum sheet.

[0014] In some embodiments, an accommodating cavity is formed in the valve cover. When the hydraulic cylinder drives the valve stem to move upward, the gate plate enters the accommodating cavity, and the valve body is in an open state.

[0015] In some embodiments, a gas pipeline is further included, wherein the gas pipeline is installed on the valve cover and communicated with the accommodating cavity.

[0016] In some embodiments, a nitrogen sealing valve is further included, and the nitrogen sealing valve is installed on the gas pipeline.

[0017] In some embodiments, a pressure gauge is further included, and the pressure gauge is installed on the valve cover.

[0018] In some embodiments, the inner wall of the valve body is recessed inward to form a mounting groove, and the mounting groove is correspondingly arranged below the valve seat.

[0019] In some embodiments, a sealing block is installed in the installation groove, and when the valve body is in a closed state, the bottom of the gate plate abuts against the sealing block.

[0020] The utility model provides a high-temperature control valve, which has the following advantages compared with the prior art:

[0021] The inductive sensor is installed on the valve cover and is arranged opposite to the sensing plate, so that the inductive sensor can be kept away from the high-temperature environment in the piston rod cavity that is leaked from the valve cover, thereby extending its service life; when the hydraulic cylinder drives the valve stem to move downward so that the gate plate enters the valve seat, so that the valve body is in a closed state, at this time the distance between the inductive sensor and the sensing plate is ≤3mm, the inductive sensor can accurately detect the switching signal, and the sensing plate is elastic, and will not be damaged even if it abuts against the inductive sensor, thereby being able to detect the switching signal stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic front cross-sectional structural diagram of a high-temperature control valve provided in an embodiment of the present utility model.

[0023] Figure 2 This is a schematic diagram of a partial cross-sectional structure of a high-temperature control valve provided in an embodiment of the utility model from a left perspective.

[0024] In the figure: 1. Valve body; 11. Guide rail; 12. Mounting groove; 13. Sealing block; 2. Valve cover; 21. Packing; 22. Gland; 23. Accommodating chamber; 3. Gate; 4. Drive assembly; 41. Bracket; 42. Hydraulic cylinder; 421. Piston rod; 43. Clamping block; 5. Sensing assembly; 51. Connecting rod; 52. Sensing plate; 53. Inductive sensor; 6. Valve seat; 7. Valve stem; 8. Gas pipeline; 9. Nitrogen sealing valve; 10. Pressure gauge. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0026] It should be understood that in the description of this application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. That is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0027] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1-2 As shown, the high-temperature control valve of the embodiment of the present utility model includes a valve body 1, a valve cover 2, a gate plate 3, a drive component 4 and a sensing component 5.

[0029] A valve seat 6 is provided in the middle of the valve body 1 , and a guide rail 11 is provided on the valve body 1 above the valve seat 6 .

[0030] The valve cover 2 is mounted on the valve body 1 and is located above the guide rail 11 .

[0031] The gate plate 3 is disposed in the valve seat 6 , and a valve stem 7 is mounted on the upper end of the gate plate 3 . The valve stem 7 passes through the guide rail 11 of the valve body 1 and extends upward out of the valve cover 2 .

[0032] The driving assembly 4 includes a bracket 41, a hydraulic cylinder 42 and a clamping block 43. The hydraulic cylinder 42 is mounted on the valve cover 2 through the bracket 41. The piston rod 421 of the hydraulic cylinder 42 is connected to the valve stem 7 through the clamping block 43. The piston rod 421 of the hydraulic cylinder 42 can drive the valve stem 7 to move up and down.

[0033] The sensing assembly 5 includes a connecting rod 51, a sensing plate 52, and an inductive sensor 53. The first end of the connecting rod 51 is connected to the outer wall of the clamping block 43. The second end of the connecting rod 51 extends laterally from the bracket 41 and connects to the sensing plate 52. The inductive sensor 53 is mounted on the valve cover 2 and is positioned opposite the sensing plate 52. The inductive sensor 53 operates based on electromagnetic induction, converting the displacement of the sensing plate 52 into a change in inductance.

[0034] In this embodiment, when the hydraulic cylinder 42 drives the valve stem 7 downward, causing the gate 3 to enter the valve seat 6 and close the valve body 1, the distance between the inductive sensor 53 and the sensing plate 52 is ≤ 3 mm. At this point, the inductive sensor 53 can accurately detect the switch signal. Specifically, the inductive sensor 53 is model NJ3-18GK-S1N, with a rated sensing distance of 3 mm. When the distance between the inductive sensor 53 and the sensing plate 52 exceeds 3 mm, the inductive sensor 53 will not detect the closing signal.

[0035] When in use, the hydraulic cylinder 42 is started to drive the valve stem 7 downward through the piston rod 421, so that the gate plate 3 enters the valve seat 6, and the valve body 1 is in a closed state. At this time, the inductive sensor 53 detects a closing signal; or the hydraulic cylinder 42 is started to drive the valve stem 7 upward through the piston rod 421, so that the gate plate 3 leaves the valve seat 6 and enters the valve cover 2, and the valve body 1 is in an open state. At this time, the inductive sensor 53 detects an opening signal.

[0036] like Figure 1 As shown, in one embodiment, the gate plate 3 has a wedge-shaped longitudinal section, and the thickness of the gate plate 3 gradually decreases from top to bottom, which facilitates the gate plate 3 to be inserted into or removed from the valve seat 6. Accordingly, the middle portion of the valve seat 6 has an installation space adapted for the gate plate 3, and both sides of the installation space are connected to the valve body 1. Therefore, when the gate plate 3 enters the valve seat 6, the valve body 1 can be closed. Conversely, when the gate plate 3 leaves the valve seat 6, the valve body 1 can be opened.

[0037] In one embodiment, a packing 21 is filled between the valve cover 2 and the valve stem 7. A gland 22 is sleeved around the outer periphery of the valve stem 7 and mounted on the valve cover 2. The packing 21 prevents fluid in the valve cover 2 from leaking out, and the gland 22 prevents the packing 21 from leaking from between the valve cover 2 and the valve stem 7, further enhancing the anti-leakage effect.

[0038] Specifically, the sensing sheet 52 is an aluminum sheet. The aluminum sheet has a certain deformation effect, so even if it directly contacts the inductive sensor 53, it will not cause damage to the inductive sensor 53, and can be used normally. In addition, the deformation can also adjust the distance between the sensing sheet 52 and the inductive sensor 53 to meet measurement requirements.

[0039] In one embodiment, a receiving chamber 23 is formed within the valve cover 2. When the hydraulic cylinder 42 drives the valve stem 7 upward, the gate plate 3 enters the receiving chamber 23, placing the valve body 1 in an open state. The receiving chamber 23 provides sufficient space for the gate plate 3 to move up and down, facilitating control of the opening or closing of the valve body 1.

[0040] In one embodiment, the high temperature control valve further includes a gas pipeline 8, which is mounted on the valve cover 2 and communicates with the accommodating cavity 23. The gas pipeline 8 is used to communicate with a nitrogen source and can input nitrogen into the valve cover 2, thereby reducing the temperature inside the valve cover 2.

[0041] In one embodiment, the high temperature control valve further comprises a nitrogen sealing valve 9, which is installed on the gas pipeline 8. The nitrogen sealing valve 9 can control the pressure of the nitrogen gas input into the valve cover 2.

[0042] In one embodiment, a pressure gauge 10 is further included and installed on the valve cover 2. The pressure gauge 10 is used to detect the gas pressure in the valve cover 2.

[0043] Specifically, the inner wall of the valve body 1 is recessed inward to form a mounting groove 12, and the mounting groove 12 is correspondingly provided below the valve seat 6. When the valve body 1 is closed, the gate 3 can enter the mounting groove 12.

[0044] Furthermore, a sealing block 13 is installed in the mounting groove 12. When the valve body 1 is in a closed state, the bottom of the gate plate 3 abuts against the sealing block 13. This makes the sealing effect of the gate plate 3 in the valve body 1 better when the valve body 1 is closed.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A high temperature control valve, characterized in that: include: The valve body has a valve seat in the middle, and the valve body above the valve seat is provided with a guide rail; a valve cover, mounted on the valve body and located above the guide rail; a gate plate disposed in the valve seat, wherein a valve stem is mounted on the upper end of the gate plate, and the valve stem extends upward out of the valve cover; a drive assembly comprising a bracket, a hydraulic cylinder, and a clamping block, wherein the hydraulic cylinder is mounted on the valve cover via the bracket, and the piston rod of the hydraulic cylinder is connected to the valve stem via the clamping block; and a sensing assembly comprising a connecting rod, a sensing plate, and an inductive sensor, wherein a first end of the connecting rod is connected to an outer wall of the clamping block, a second end of the connecting rod extends laterally out of the bracket and is connected to the sensing plate, and the inductive sensor is mounted on the valve cover and disposed opposite the sensing plate; When the hydraulic cylinder drives the valve stem to move downward so that the gate plate enters the valve seat, the valve body is in a closed state. At this time, the distance between the inductive sensor and the sensing sheet is ≤3 mm.

2. The high temperature control valve according to claim 1, characterized in that: The longitudinal section of the gate is wedge-shaped.

3. The high temperature control valve according to claim 1, characterized in that: A filler is filled between the valve cover and the valve stem. A pressure cover is sleeved on the outer periphery of the valve stem. The pressure cover is installed on the valve cover.

4. The high temperature control valve according to claim 1, characterized in that: The induction sheet is an induction aluminum sheet.

5. The high temperature control valve according to claim 1, characterized in that: An accommodating cavity is formed in the valve cover. When the hydraulic cylinder drives the valve stem to move upward, the gate plate enters the accommodating cavity, and the valve body is in an open state.

6. The high temperature control valve according to claim 5, characterized in that: It also includes a gas pipeline, which is installed on the valve cover and communicates with the accommodating cavity.

7. The high temperature control valve according to claim 6, characterized in that: It also includes a nitrogen sealing valve, which is installed on the gas pipeline.

8. The high temperature control valve according to claim 6 or 7, characterized in that: Also included is a pressure gauge, which is mounted on the valve cover.

9. The high temperature control valve according to claim 1, characterized in that: The inner wall of the valve body is recessed inward to form a mounting groove, and the mounting groove is correspondingly arranged below the valve seat.

10. The high temperature control valve according to claim 9, characterized in that: A sealing block is installed in the installation groove, and when the valve body is in a closed state, the bottom of the gate plate abuts against the sealing block.

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