No-dead-corner valve and reaction kettle

Abstract

The utility model discloses a dead-corner-free valve and a reaction kettle, which completely solve the problems of residue, leakage and complicated operation of a traditional valve through smooth transition between a profiled groove flow channel opening and an inner cavity of the kettle body, combination of closing extrusion of a valve core and cleaning of a scraper blade, thorough elimination of residual dead corners, structural optimization and layered sealing design. The method has high efficiency, reliability and economical efficiency, is an innovative scheme in the field of industrial fluid control, and is suitable for the pharmaceutical industry, the chemical industry and the food processing industry.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve and a reaction kettle, in particular to a dead angle free valve and a reaction kettle. BACKGROUND

[0002] In the chemical and pharmaceutical production field, as the core component of controlling material flow, the performance of the valve directly affects the production efficiency and product quality. Due to the structural design defects, the connecting pipeline between the traditional valve and the inner cavity of the reaction kettle is prone to form a material accumulation area. Specifically, when the valve is closed, the valve core and the valve seat can be tightly sealed, but the right angle or non-streamline transition structure in the pipeline or the joint with the valve causes material retention, especially when dealing with viscous, high-viscosity or easily solidified medium, the residual material is difficult to completely remove. Long-term accumulation of residual material can breed bacteria (pharmaceutical industry) or cause cross contamination (chemical industry), which requires frequent manual cleaning during shutdown, significantly reducing production efficiency. The structural dead angle at the pipeline connection aggravates the uneven force on the local sealing rubber ring, which can cause deformation or even damage of the rubber ring under high pressure or temperature fluctuation conditions, resulting in material leakage.

[0003] In the prior art, although the valve core shape is optimized (such as ball valve and butterfly valve) to reduce the internal dead angle of the valve, the residual problem at the connection between the valve and the external pipeline cannot be solved. Some schemes try to add a flushing port in the pipeline, but the structure is complex and increases the leakage point, and the actual effect is limited. Therefore, there is an urgent need for a new valve design that can completely eliminate the residual dead angle in the connection area between the valve and the pipeline of the reaction kettle. SUMMARY

[0004] In order to solve the above technical problems, the utility model provides a dead angle free valve and a reaction kettle.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of a dead angle free valve, which comprises a valve body, a type groove is formed in the proximal end of the valve body, the flow passage opening section of the type groove is smoothly transitioned with the inner cavity of the kettle body; a screw rod and nut assembly is arranged in the inner cavity of the valve body and rotates along the axial direction, the front end of the screw rod and nut assembly is connected with a valve core, the front end block of the valve core is matched with the type groove, and the front end block of the valve core forms a gapless fit with the type groove when closed; the rear end of the screw rod and nut assembly extends out of the valve body and is connected with a hand wheel; the inner cavity of the valve body is connected with a glue outlet outwardly.

[0006] Further, the screw rod and nut assembly comprises a screw rod and a nut, the outer surface of the screw rod is provided with external threads, the inner surface of the nut is provided with internal threads matched with the screw rod, and the screw rod and the nut form a screw transmission pair through thread cooperation; the distal end of the valve core is fixedly connected with the nut, so that the valve core realizes axial translation through the thread cooperation between the nut and the screw rod.

[0007] Further, the distal end port of the valve body is fixedly connected with a flange seat, the flange seat is sequentially provided with an oil seal, a bearing and a screw rod in the axial direction; the screw rod penetrates through the flange seat, the bearing is sleeved on the outer periphery of the screw rod, and the outer ring of the bearing is in interference fit with the inner wall of the flange seat to support the rotation of the screw rod; the oil seal is arranged on the side of the flange seat close to the valve body and covers the surface of the screw rod to seal the gap between the screw rod and the flange seat.

[0008] Further, a first rubber ring is arranged between the contact surface of the flange seat and the valve body.

[0009] Further, a second rubber ring is arranged between the circumferential side wall of the valve core and the inner wall of the valve body.

[0010] Further, a third rubber ring is arranged between the front end of the valve core and the contact surface of the valve body.

[0011] A reaction kettle comprises a kettle body, characterized in that the side wall of the kettle body is connected with the dead angle-free valve according to any one of the claims, the flow passage opening of the profile groove extends into the interior of the kettle body and is flush with the bottom wall of the kettle body, and the scraper is rotatably arranged at the upper edge of the flow passage opening of the profile groove.

[0012] The utility model discloses a dead angle-free valve and reaction kettle, and the profile groove flow passage opening and the kettle body inner chamber smoothly transition, combining valve core closing extrusion and scraper cleaning, thoroughly eliminate residual dead angle, structural optimization and layered sealing design, comprehensively solve the residual, leakage and complex operation problem of traditional valve, have high efficiency, reliability and economy, are the innovative scheme in industrial fluid control field, are applicable to the medical industry of extremely high requirement to residual and sealing property in aseptic production, and the valve can avoid cross contamination, and simultaneously applicable to the chemical industry of processing corrosive, high viscosity medium, and reliable sealing and no dead angle can reduce the frequency of shutdown cleaning, and also simultaneously applicable to the food processing industry. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the explosion map of example one.

[0014] Figure 2 It is the explosion map of example two.

[0015] Figure 3 It is the section view of example two.

[0016] In the drawing: 1, scraper; 2, valve body; 3, nut; 4, screw rod; 5, flange seat; 6, oil seal; 7, hand wheel; 8, chain two; 9, bearing; 10, valve core; 11, second rubber ring; 12, glue outlet; 13, third rubber ring; 14, kettle body; 15, profile groove. DETAILED DESCRIPTION

[0017] The utility model will be further explained in detail in connection with the drawings and specific implementation.

[0018] Example 1:

[0019] like Figure 1 As shown, a valve without dead angles includes a valve body 2. A groove 15 is formed at the proximal end of the valve body 2. The flow channel section of the groove 15 smoothly transitions with the inner cavity of the vessel body 14, avoiding material accumulation caused by a right-angle structure. A screw and nut assembly is rotatably provided axially within the inner cavity of the valve body 2. Specifically, the screw and nut assembly includes a screw 4 and a nut 3. The outer surface of the screw 4 has an external thread, and the inner surface of the nut 3 has an internal thread that matches the screw 4. The screw 4 and the nut 3 form a helical transmission pair through threaded engagement. The nut 3 is fixedly connected to the distal end of the valve core 10, allowing the valve core 10 to achieve axial translation through the threaded engagement of the nut 3 and the screw 4. The rear end of the screw and nut assembly extends out of the valve body 2 and is connected to a handwheel 7; the nut 3 drives the valve core 10 to move axially through the rotating screw 4, and the front end of the screw and nut assembly is connected to the valve core 10. The front end block of the valve core 10 matches the groove 15. When closed, the screw 4 is rotated by the handwheel 7 to make the front end block of the valve core 10 fit with the groove 15 without gap, completely blocking the material flow and squeezing out the excess material in the groove 15; the inner cavity of the valve body 2 is connected to the glue outlet 12, and the inner cavity of the valve body 2 is connected to the external pipeline through the glue outlet 12. There is no residue when closed, and the medium can be smoothly discharged along the channel when opened.

[0020] The distal end port of the valve body 2 is fixedly connected with a flange seat 5. The port of the flange seat 5 is aligned with the corresponding port of the valve body 2, the connecting holes (such as bolt holes) of the two are completely matched, the flange seat 5 and the valve body 2 are fastened by bolts, the flange seat 5 is sequentially provided with an oil seal 6, a bearing 8 and a lead screw 4 in the axial direction; the lead screw 4 penetrates through the flange seat 5, the bearing 8 is sleeved on the outer periphery of the lead screw 4, and the outer ring of the bearing 8 is in interference fit with the inner wall of the flange seat 5 to support the rotation of the lead screw 4; the oil seal 6 is arranged on the side of the flange seat 5 close to the valve body 2 and covers the surface of the lead screw 4 to seal the gap between the lead screw 4 and the flange seat 5. The oil seal 6 cooperates with the bearing 8 to support the rotation of the lead screw 4 and prevent leakage; a first rubber ring 9 seals the static joint between the flange seat 5 and the valve body 2. The first rubber ring 9 is arranged in a sealing groove between the contact surface of the flange seat 5 and the valve body 2. The sealing groove is designed as an annular groove for fixing the rubber ring and ensuring uniform pressure. A second rubber ring 11 is arranged between the circumferential side wall of the valve core 10 and the inner wall of the valve body 2. An annular groove is formed in the circumferential side wall of the valve core 10, and the second rubber ring 11 is embedded in the groove. When the valve core 10 moves axially, the rubber ring moves with the valve core and is in elastic contact with the inner wall of the valve body 2; the second rubber ring 11 prevents the medium from leaking from the lateral gap between the valve core and the valve body and is suitable for sealing in dynamic displacement; a third rubber ring 13 is arranged between the front end of the valve core 10 and the contact surface of the valve body 2. An annular sealing groove is formed on the front end surface of the valve core 10, and the third rubber ring is embedded in the groove. When the valve is closed, the front end block of the valve core presses the profile groove, the third rubber ring is extruded and deformed, and the micro gap is filled.

[0021] Example two:

[0022] As Figure 2 and Figure 3As shown, a reaction kettle comprises a kettle body 14, a side wall of the kettle body 14 is connected with a dead angle free valve, the dead angle free valve comprises a valve body 2, a proximal end of the valve body 2 is provided with a profile groove 15, a flow passage opening section of the profile groove 15 is smoothly transitioned with an inner cavity of the kettle body 14; a screw nut assembly is arranged in the inner cavity of the valve body 2 and rotates along an axial direction, specifically, the screw nut assembly comprises a screw rod 4 and a nut 3, an outer surface of the screw rod 4 is provided with an external thread, an inner surface of the nut 3 is provided with an internal thread matched with the screw rod 4, the screw rod 4 and the nut 3 form a screw transmission pair through thread cooperation; a distal end of the nut 3 is fixedly connected with a valve core 10 so that the valve core 10 realizes axial translation through thread cooperation of the nut 3 and the screw rod 4, a rear end of the screw nut assembly extends out of the valve body 2 and is connected with a hand wheel 7; an inner cavity of the valve body 2 is outwardly communicated with a glue outlet 12, the inner cavity of the valve body 2 is connected with an external pipeline through the glue outlet 12. A distal end port of the valve body 2 is fixedly connected with a flange seat 5, an oil seal 6, a bearing 8 and the screw rod 4 are sequentially arranged in the flange seat 5 along an axial direction; the screw rod 4 penetrates through the flange seat 5, the bearing 8 is sleeved on an outer periphery of the screw rod 4, and an outer ring of the bearing 8 is in interference fit with an inner wall of the flange seat 5 to support rotation of the screw rod 4; the oil seal 6 is arranged on a side of the flange seat 5 close to the valve body 2 and covers a surface of the screw rod 4 to seal a gap between the screw rod 4 and the flange seat 5. A first rubber ring 9 is arranged between a contact surface of the flange seat 5 and the valve body 2. A second rubber ring 11 is arranged between a circumferential side wall of the valve core 10 and an inner wall of the valve body 2, and a third rubber ring 13 is arranged between a contact surface of a front end of the valve core 10 and the valve body 2.

[0023] The flow passage opening of the profile groove 15 extends into the inside of the kettle body 14 and is flush with a bottom wall of the kettle body 14, and a scraper 1 of the kettle body 14 is rotationally arranged on an upper edge of the flow passage opening of the profile groove 15. Through the design of the smoothly transitioned flow passage opening, material retention caused by right angles or non-streamlined structures is avoided, residual material in the profile groove 15 is actively extruded when the valve core 10 is closed, and the scraper 1 is used for auxiliary cleaning, so that dead angles at a connection between the reaction kettle and the valve are completely eliminated.

[0024] The above-mentioned embodiments are not a limitation of the present application, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "join" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, can be internal communication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to specific circumstances. The present application is also not limited to the above examples, the changes, modifications, additions or replacements made by the technicians in the technical field within the technical scheme range of the present application also belong to the protection range of the present application. In addition, the technical features involved in different embodiments of the present application described above can be combined with each other as long as they do not conflict with each other.

Claims

1. A valve with no dead angle, characterized in that, The valve body (2) includes a groove (15) at its proximal end, and the flow channel section of the groove (15) smoothly transitions with the inner cavity of the vessel body (14). A screw nut assembly is rotatably provided in the inner cavity of the valve body (2) along the axial direction. A valve core (10) is connected to the front end of the screw nut assembly. The front end block of the valve core (10) matches the groove (15). When closed, the front end block of the valve core (10) and the groove (15) form a gapless fit. The rear end of the screw nut assembly extends out of the valve body (2) and is connected to a handwheel (7). The inner cavity of the valve body (2) is connected to an outlet (12).

2. The dead-angle-free valve according to claim 1, characterized in that: The lead screw and nut assembly includes a lead screw (4) and a nut (3). The outer surface of the lead screw (4) is provided with an external thread, and the inner surface of the nut (3) is provided with an internal thread that matches the lead screw (4). The lead screw (4) and the nut (3) form a helical transmission pair through threaded engagement. The nut (3) is fixedly connected to the far end of the valve core (10), so that the valve core (10) can achieve axial translation through the threaded engagement between the nut (3) and the lead screw (4).

3. The dead-angle-free valve according to claim 2, characterized in that: The valve body (2) is fixedly connected to a flange seat (5) at its far end. An oil seal (6), a bearing (8) and a lead screw (4) are arranged sequentially along the axial direction inside the flange seat (5). The lead screw (4) passes through the flange seat (5). The bearing (8) is sleeved on the outer circumference of the lead screw (4), and the outer ring of the bearing (8) is interference-fitted with the inner wall of the flange seat (5) to support the rotation of the lead screw (4). The oil seal (6) is located on the side of the flange seat (5) near the valve body (2) and covers the surface of the lead screw (4) to seal the gap between the lead screw (4) and the flange seat (5).

4. The dead-angle-free valve according to claim 3, characterized in that: A rubber ring (9) is provided between the contact surface of the flange seat (5) and the valve body (2).

5. The dead-angle-free valve according to claim 3, characterized in that: A second rubber ring (11) is provided between the circumferential sidewall of the valve core (10) and the inner wall of the valve body (2).

6. The dead-angle-free valve according to claim 3, characterized in that: A No. 3 rubber ring (13) is provided between the front end of the valve core (10) and the contact surface of the valve body (2).

7. A reaction vessel, comprising a vessel body (14), characterized in that: The side wall of the vessel body (14) is connected to the dead-angle-free valve as described in any one of claims 1-6. The flow channel of the groove (15) extends into the interior of the vessel body (14) and is flush with the bottom wall of the vessel body (14). The scraper (1) of the vessel body (14) is rotatably set on the upper edge of the flow channel of the groove (15).

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