Device for automatically controlling usage amount of hydrogen sulfide

Abstract

The utility model is applicable to the field of thiourea production, and provides a device for automatically controlling the use amount of hydrogen sulfide, which comprises a gas pipeline, a control valve connected with the gas pipeline and a flowmeter mounted on the gas pipeline, the control valve comprises a valve body, a movable head, a rubber head, a stepping motor and a connecting shaft, a cable I is arranged on the outer side of the flowmeter, and a cable II is arranged on the outer side of the cable II. A first cable is arranged on the outer side of the stepping motor, a second cable is arranged on the outer side of the stepping motor, the first cable and the second cable comprise a signal line and a power line, the first cable and the second cable are connected with an external control system, the flow of hydrogen sulfide is detected through an arranged flow meter, and data are uploaded to the external control system in real time through the first cable. An external control system automatically controls rotation of a stepping motor, a threaded head arranged at the lower end of a connecting shaft is matched with a threaded hole, the positions of a movable head and a rubber head are adjusted to connect and disconnect a gas conveying pipeline, and therefore the flow speed of hydrogen sulfide is automatically controlled, and the use amount of hydrogen sulfide is indirectly controlled.

Description

Technical Field

[0001] The utility model belongs to the field of thiourea production, and in particular relates to a device for automatically controlling the usage of hydrogen sulfide. Background Art

[0002] Thiourea, an organic sulfur compound, occurs as white, lustrous crystals. It is a commonly used reducing agent and sulfur-containing reagent in organic synthesis, primarily for the reduction of endoperoxides and ozonides. In industrial production, it is typically produced by reacting hydrogen sulfide with lime slurry to form calcium hydrosulfide, which is then reacted with calcium cyanamide. It can also be produced by melting ammonium thiocyanate or by reacting cyanamide with hydrogen sulfide.

[0003] In the industrial production of thiourea, excess hydrogen sulfide is usually introduced to ensure the completeness of the reaction. However, hydrogen sulfide is highly toxic and corrosive, and residual hydrogen sulfide in the reaction unit may affect the unit life and thiourea purity. Therefore, the amount of hydrogen sulfide used needs to be controlled to reduce the reaction residue of hydrogen sulfide. Utility Model Content

[0004] The purpose of the embodiments of the present utility model is to provide a device for automatically controlling the amount of hydrogen sulfide used, aiming to solve the problems raised in the background technology.

[0005] The embodiment of the present utility model is implemented as follows: a device for automatically controlling the amount of hydrogen sulfide used, comprising a gas transmission pipeline, a control valve connected to the gas transmission pipeline, and a flow meter installed on the gas transmission pipeline, the control valve comprising a valve body, a movable head, a rubber head, a stepping motor and a connecting shaft, the valve body being fixedly provided with a control chamber, the rubber head being fixedly sleeved on the outside of the movable head, the movable head and the rubber head being movably arranged in the control chamber, the rubber head being in extrusion contact with the side of the control chamber, the lower end of the stepping motor being fixedly provided with a mounting seat, the lower end of the mounting seat being fixedly installed on the upper end of the valve body, the connecting shaft being fixedly connected to the main shaft of the stepping motor, the lower end of the connecting shaft being fixedly provided with a threaded head, the movable head being fixedly provided with a threaded hole in the middle of the upper end corresponding to the threaded head, the threaded head being movably located in the threaded hole, a cable 1 being provided on the outside of the flow meter, a cable 2 being provided on the outside of the stepping motor, the cable 1 and the cable 2 comprising a signal line and a power line, and the cable 1 and the cable 2 being connected to an external control system.

[0006] As a further solution of the present invention: the valve body is set to a columnar structure, both sides of the control valve are fixedly connected to the gas pipeline, a sealing gasket is installed between the upper end of the valve body and the mounting seat, and the sealing gasket is set to an elastic material.

[0007] As a further solution of the present invention: an extrusion spring is provided in the control cavity below the rubber head, and the extrusion spring presses and contacts the lower end of the rubber head and the lower end of the control cavity.

[0008] As a further solution of the present invention: a sealing ring groove is fixedly opened on the side of the control cavity, a sealing ring is movably clamped in the sealing ring groove, the sealing ring is set to an elastic material, and the sealing ring is in extrusion contact with the side of the rubber head.

[0009] As a further solution of the present invention: a slot is fixedly provided at the lower end of the outer side of the movable head, and a clamping block is provided on the inner side of the rubber head corresponding to the slot, and the clamping block is movably engaged in the slot.

[0010] As a further solution of the present invention: a plurality of limit blocks are fixedly provided on the upper end of the outer side of the movable head, and a plurality of limit grooves with matching cross-sections are opened on the side of the control cavity corresponding to the limit blocks.

[0011] The beneficial effects of the present invention are:

[0012] 1. An embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used. The device detects the flow rate of hydrogen sulfide through a flow meter and uploads the data in real time to an external control system through a cable. The external control system automatically controls the rotation of the stepper motor, and adjusts the positions of the movable head and the rubber head by connecting the threaded head provided at the lower end of the shaft to the threaded hole to open and close the gas pipeline, thereby automatically controlling the flow rate of hydrogen sulfide and indirectly controlling the amount of hydrogen sulfide used.

[0013] 2. The embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used. The valve body is sealed by a sealing gasket, thereby improving the air tightness of the device, preventing the leakage of hydrogen sulfide from polluting the environment, and indirectly improving the accuracy of the flow meter in measuring the hydrogen sulfide flow.

[0014] 3. The embodiment of the utility model provides a device for automatically controlling the amount of hydrogen sulfide used. The extrusion spring is provided to play the role of extrusion buffering on the rubber head to ensure the stability of airflow control. At the same time, it can also squeeze the movable head and the rubber head to prevent the rubber head and the movable head from falling off.

[0015] 4. The embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used, which squeezes and seals the side of the rubber head through a set sealing ring. Under the limitation of the sealing ring groove, the sealing ring can be prevented from slipping out. Combined with the set sealing gasket, the sealing effect of the valve body can be further improved.

[0016] 5. An embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used. By means of a card block that is provided and engages in a card slot, the firmness of the rubber head and the movable head assembly is improved, the rubber head is prevented from loosening, and the lifting and lowering of the movable head is conveniently controlled to thereby control the flow rate of hydrogen sulfide in the gas pipeline by the rubber head.

[0017] 6. An embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used, which limits the axial rotation of the movable head by setting a limit groove in conjunction with a limit block to prevent the movable head from rotating during operation, so that the movable head can and can only move up and down under the action of the threaded head and the threaded hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional structural diagram of a device for automatically controlling the amount of hydrogen sulfide used provided by an embodiment of the utility model;

[0019] Figure 2 A partial cross-sectional view of a control valve of a device for automatically controlling the amount of hydrogen sulfide used provided by an embodiment of the present utility model;

[0020] Figure 3 for Figure 2 Enlarged schematic diagram of point A in the middle.

[0021] In the accompanying drawings: gas pipeline 1, control valve 2, valve body 21, control chamber 22, limit groove 221, sealing ring groove 222, movable head 23, card slot 231, threaded hole 232, limit block 233, rubber head 24, card block 241, extrusion spring 25, sealing gasket 26, stepper motor 27, mounting seat 271, cable 2 272, connecting shaft 28, threaded head 281, sealing ring 29, flowmeter 3, cable 1 31. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] like Figures 1 to 3As shown, an embodiment of the present invention provides a device for automatically controlling the amount of hydrogen sulfide used, comprising a gas pipeline 1, a control valve 2 connected to the gas pipeline 1, and a flow meter 3 installed on the gas pipeline 1. The control valve 2 comprises a valve body 21, a movable head 23, a rubber head 24, a stepping motor 27, and a connecting shaft 28. A control chamber 22 is fixedly provided in the valve body 21, the rubber head 24 is fixedly sleeved on the outside of the movable head 23, the movable head 23 and the rubber head 24 are movably arranged in the control chamber 22, the rubber head 24 is in extrusion contact with the side of the control chamber 22, and the lower end of the stepping motor 27 is fixedly provided with a mounting Seat 271, the lower end of the mounting seat 271 is fixedly mounted on the upper end of the valve body 21, the connecting shaft 28 is fixedly connected to the main shaft of the stepping motor 27, the lower end of the connecting shaft 28 is fixedly provided with a threaded head 281, and the movable head 23 is fixedly provided with a threaded hole 232 in the middle of the upper end corresponding to the threaded head 281, and the threaded head 281 is movably located in the threaded hole 232, a cable 1 31 is provided on the outside of the flow meter 3, and a cable 2 272 is provided on the outside of the stepping motor 27, the cable 1 31 and the cable 2 272 include a signal line and a power line, and the cable 1 31 and the cable 2 272 are connected to an external control system.

[0025] In one embodiment of the present invention, the flow rate of hydrogen sulfide is detected by a flow meter 3, and the data is uploaded to an external control system in real time through a cable 31. The external control system automatically controls the rotation of the stepper motor 27, and adjusts the positions of the movable head 23 and the rubber head 24 to open and close the gas pipeline 1 by cooperating with the threaded hole 232 through the threaded head 281 set at the lower end of the connecting shaft 28, thereby automatically controlling the flow rate of hydrogen sulfide and indirectly controlling the amount of hydrogen sulfide used.

[0026] like Figure 1 and Figure 2 As shown, as another embodiment of the present invention, the valve body 21 is configured as a columnar structure, both sides of the control valve 2 are fixedly connected to the gas pipeline 1, and a sealing gasket 26 is installed between the upper end of the valve body 21 and the mounting seat 271, and the sealing gasket 26 is configured as an elastic material.

[0027] In one embodiment of the present invention, the valve body 21 is sealed by providing a sealing gasket 26 to improve the air tightness of the device, prevent the leakage of hydrogen sulfide from polluting the environment, and indirectly improve the accuracy of the flow meter 3 in measuring the hydrogen sulfide flow.

[0028] like Figure 2 As shown, as another embodiment of the present invention, a pressing spring 25 is provided in the control chamber 22 below the rubber head 24 , and the pressing spring 25 presses and contacts the lower end of the rubber head 24 and the lower end of the control chamber 22 .

[0029] In one embodiment of the present invention, the extrusion spring 25 is provided to play the role of squeezing and buffering the rubber head 24 to ensure the stability of airflow control. At the same time, it can also squeeze the movable head 23 and the rubber head 24 to prevent the rubber head 24 and the movable head 23 from falling off.

[0030] like Figure 2 and Figure 3 As shown, as another embodiment of the present invention, a sealing ring groove 222 is fixedly opened on the side of the control chamber 22, and a sealing ring 29 is movably clamped in the sealing ring groove 222. The sealing ring 29 is set to an elastic material, and the sealing ring 29 is in extrusion contact with the side of the rubber head 24.

[0031] In one embodiment of the present invention, a sealing ring 29 is provided to squeeze and seal the side of the rubber head 24. Under the limitation of the sealing ring groove 222, the sealing ring 29 can be prevented from sliding out. In combination with the provided sealing gasket 26, the sealing effect of the valve body 21 can be further improved.

[0032] like Figure 2 As shown, as another embodiment of the present invention, a slot 231 is fixedly provided at the lower end of the outer side of the movable head 23 , and a clamping block 241 is provided on the inner side of the rubber head 24 corresponding to the slot 231 , and the clamping block 241 is movably engaged in the slot 231 .

[0033] In one embodiment of the present invention, the provided block 241 is engaged in the card slot 231 to improve the firmness of the set of the rubber head 24 and the movable head 23, prevent the rubber head 24 from loosening, and facilitate the control of the lifting and lowering of the movable head 23 and thus control the rubber head 24 to control the flow rate of hydrogen sulfide in the gas pipeline 1.

[0034] like Figure 2 and Figure 3 As shown, as another embodiment of the present invention, a plurality of limit blocks 233 are fixedly provided on the upper end of the outer side of the movable head 23 , and a plurality of limit grooves 221 with matching cross-sections are opened on the side of the control cavity 22 corresponding to the limit blocks 233 .

[0035] In one embodiment of the present invention, the axial rotation of the movable head 23 is limited by the limit groove 221 and the limit block 233 to prevent the movable head 23 from rotating during operation, so that the movable head 23 can and can only move up and down under the action of the threaded head 281 and the threaded hole 232.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0037] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A device for automatically controlling the amount of hydrogen sulfide used, comprising a gas pipeline (1), a control valve (2) connected to the gas pipeline (1), and a flow meter (3) installed on the gas pipeline (1), characterized in that: The control valve (2) comprises a valve body (21), a movable head (23), a rubber head (24), a stepping motor (27) and a connecting shaft (28); a control chamber (22) is fixedly provided in the valve body (21); the rubber head (24) is fixedly sleeved on the outside of the movable head (23); the movable head (23) and the rubber head (24) are movably arranged in the control chamber (22); the rubber head (24) is in extrusion contact with the side of the control chamber (22); a mounting seat (271) is fixedly provided at the lower end of the stepping motor (27); the lower end of the mounting seat (271) is fixedly mounted on the upper end of the valve body (21); the connecting shaft (28 ... 8) is fixedly connected to the main shaft of the stepping motor (27), the lower end of the connecting shaft (28) is fixedly provided with a threaded head (281), the movable head (23) is fixedly provided with a threaded hole (232) in the middle of the upper end corresponding to the threaded head (281), the threaded head (281) is movably located in the threaded hole (232), the outer side of the flow meter (3) is provided with a cable 1 (31), the outer side of the stepping motor (27) is provided with a cable 2 (272), the cable 1 (31) and the cable 2 (272) include a signal line and a power line, and the cable 1 (31) and the cable 2 (272) are connected to an external control system.

2. The device for automatically controlling the amount of hydrogen sulfide used according to claim 1, characterized in that: The valve body (21) is configured as a columnar structure. Both sides of the control valve (2) are fixedly connected to the gas pipeline (1). A sealing gasket (26) is installed between the upper end of the valve body (21) and the mounting seat (271). The sealing gasket (26) is configured as an elastic material.

3. The device for automatically controlling the amount of hydrogen sulfide used according to claim 2, characterized in that: A pressing spring (25) is provided in the control chamber (22) below the rubber head (24), and the pressing spring (25) presses and contacts the lower end of the rubber head (24) and the lower end of the control chamber (22).

4. The device for automatically controlling the amount of hydrogen sulfide used according to claim 1, characterized in that: A sealing ring groove (222) is fixedly provided on the side of the control cavity (22), and a sealing ring (29) is movably provided in the sealing ring groove (222). The sealing ring (29) is made of elastic material, and the sealing ring (29) is in extrusion contact with the side of the rubber head (24).

5. The device for automatically controlling the amount of hydrogen sulfide used according to claim 1, characterized in that: A clamping slot (231) is fixedly provided at the lower end of the outer side of the movable head (23), and a clamping block (241) is provided on the inner side of the rubber head (24) corresponding to the clamping slot (231), and the clamping block (241) is movably clamped in the clamping slot (231).

6. The device for automatically controlling the amount of hydrogen sulfide used according to claim 5, characterized in that: A plurality of limiting blocks (233) are fixedly provided on the upper end of the outer side of the movable head (23), and a plurality of limiting grooves (221) with matching cross-sections are provided on the side of the control cavity (22) corresponding to the limiting blocks (233).

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