Detention-free corrosion-resistant tank bottom valve

Abstract

The utility model relates to a retention-free corrosion-resistant tank bottom valve, which is characterized in that a valve cavity is provided with a hemispherical cavity bottom, a discharge pipe is mounted on the side surface of a valve body, and the inner peripheral edge of the discharge pipe is tangent to and communicated with the lowest point of the hemispherical cavity bottom. The utility model has the beneficial effects that when the valve rod drives the valve core to open the feed port, materials can quickly enter the valve cavity of the valve body under the action of gravity or pressure in the tank body and are discharged through the discharge pipe, and as the bottom of the valve cavity is hemispherical, and the peripheral edge of the discharge pipe is tangent and communicated with the lowest point of the hemispherical valve cavity, the materials can be discharged through the discharge pipe. Therefore, the materials cannot be retained in the valve cavity of the valve body, the materials entering the valve body are completely discharged, the situation that the materials are retained in the valve body and follow-up production is affected is avoided, the production continuity and the utilization rate of a product line are improved, and the operation cost is reduced. And secondly, the valve body, the valve rod and the valve core which can be in contact with materials in the valve are all made of hastelloy, so that the tank bottom valve has good corrosion resistance.

Description

TECHNICAL FIELD

[0001] The utility model relates to a control valve, more particularly to a corrosion-resistant tank bottom valve without stagnation, mainly applied to the control of medium discharge in a tank. BACKGROUND

[0002] The tank bottom valve, also known as a kettle bottom valve, is installed at the bottom of a reaction tank, an extraction tank or an autoclave, and mainly functions to control the discharge of reaction or purification materials in the reaction tank, the extraction tank or the autoclave.

[0003] The valve core of the existing tank bottom valve installed at the bottom of a reaction tank, an extraction tank or an autoclave directly contacts the materials in the tank, and the reaction or purification materials in the tank are corrosive, so the tank bottom valve has high requirements for corrosion resistance. Moreover, due to the limitation of the valve body structure, the discharged materials cannot be completely discharged from the valve body and are prone to remaining in the valve body, which may cause the materials to mix with other materials in subsequent production, resulting in certain risks and safety hazards. SUMMARY

[0004] To solve the above technical problems, the utility model provides a corrosion-resistant tank bottom valve without stagnation, which has high corrosion resistance and can avoid incomplete discharge of materials, so that the materials do not remain in the valve body and affect the subsequent use of the reaction tank, the extraction tank or the autoclave.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a corrosion-resistant tank bottom valve without stagnation, which comprises a valve body, a valve core, a valve rod and an opening and closing mechanism. A valve cavity, a feed inlet, a control port and a discharge pipe are arranged in the valve body. The valve core is connected to the valve rod at one end and is connected to the opening and closing mechanism outside the valve body at the other end. The valve cavity has a semispherical bottom. The discharge pipe is installed on the side surface of the valve body and is in tangential connection with the lowest point of the semicircular bottom. The valve core comprises a plug, a sealing gasket and a support seat arranged in sequence. The plug matches the inner diameter of the feed inlet. The outer diameter of the sealing gasket is larger than that of the plug but smaller than that of the support seat. The valve rod is fixedly connected to the plug at one end and can make the plug block the feed inlet under the drive of the opening and closing mechanism. The support seat can press the sealing gasket to make the sealing gasket tightly seal the feed inlet with the side wall of the valve cavity.

[0006] Preferably, the surface of the plug in contact with the inside of the tank is an arc surface, so that the center of the plug is higher than the edge.

[0007] Preferably, a double-layer sealing ring is arranged at the connection between the valve rod and the valve core, and the end of the valve rod connected to the valve core is conical.

[0008] Preferably, a sealing packing and a pressure-adjustable plate for extruding the sealing packing are arranged at the control port of the valve body, the valve rod is in dynamic sealing cooperation with the sealing packing and penetrates through the pressure-adjustable plate to be fixedly connected with the opening and closing mechanism.

[0009] Preferably, a support frame is arranged between the valve body and the opening and closing mechanism, and guide strips are arranged at opposite positions of the support frame, respectively; a sliding block is detachably fixed outside the valve rod, and the sliding block is in cooperation with the guide strips at two ends thereof, respectively.

[0010] Preferably, a fixing plate is arranged on the support frame, a threaded shaft sleeve penetrates through the shaft hole, and bearings are arranged at two surfaces of the shaft hole and the threaded shaft sleeve, respectively; the opening and closing mechanism is fixedly connected with the threaded shaft sleeve, and an outer thread is arranged on at least a partial outer circumferential side wall of one end of the valve rod, and the outer thread is in threaded connection with the threaded shaft sleeve penetrating through the threaded shaft sleeve, so that the valve rod can be driven to move up and down along the threaded shaft sleeve to drive the valve core to open or block the feeding port in the valve body when the opening and closing mechanism is reversely rotated by external force.

[0011] Preferably, a dust cover is arranged at the end of the threaded shaft sleeve.

[0012] The beneficial effect of the utility model is that the bottom of the valve cavity is semispherical, the discharge pipe is installed on the side surface of the valve body, the inner peripheral edge of the discharge pipe is tangent to the lowest point of the semicircular cavity bottom and is in communication with the semicircular cavity bottom, when the valve rod drives the valve core to open the feeding port, the material can rapidly enter the valve cavity of the valve body under the action of gravity or the pressure in the tank body and is discharged through the discharge pipe, because the bottom of the valve cavity is semispherical, and the peripheral edge of the discharge pipe is tangent to the lowest point of the semispherical valve cavity and is in communication with the semispherical valve cavity, so that the material cannot be retained in the valve cavity of the valve body, the material entering the valve body is discharged completely, the material retained in the valve body is avoided to affect the subsequent production, the production continuity and utilization rate of the product line are improved, and the operation cost is reduced. Secondly, the valve body, the valve rod and the valve core in contact with the material in the valve are all made of hastelloy, so that the tank bottom valve has good corrosion resistance. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 It is a perspective view of the non-retention corrosion-resistant tank bottom valve of the utility model embodiment

[0014] Fig. 2 It is a sectional view of the non-retention corrosion-resistant tank bottom valve of the utility model embodiment DETAILED DESCRIPTION

[0015] The utility model embodiment is further described below with reference to the accompanying drawings Figs. 1-2 The utility model embodiment is further described below with reference to the accompanying drawings

[0016] The utility model discloses a non-residence's corrosion -resistant tank bottom valve, including valve body 1, valve core 2, valve stem 3 and open and close mechanism 4, be equipped with valve cavity 11 and respectively with valve cavity 11 links and communicates feed inlet 12, control port 13 and discharge pipe 14 in valve body 1, valve core 2 one end is connected with valve stem 3, the other end passes through valve cavity 11 and control port 13 and is placed in valve body 1 outside and is connected with open and close mechanism 4, valve cavity 11 has hemispherical cavity bottom, discharge pipe 14 is installed in the side of valve body 1, and its inner peripheral edge is tangent and communicates with the lowest point of semicircular cavity bottom, when valve stem 3 drives valve core 2 and makes valve core 2 open feed inlet 12, material will rapidly enter valve cavity 11 in valve body 1 under the action of gravity or tank body pressure and is discharged through discharge pipe 14, because valve cavity 11 bottom is hemispherical, and the peripheral edge of discharge pipe 14 is tangent and communicates with the lowest point of hemispherical valve cavity 11, so material will not be residence in valve cavity 11 of valve body 1 makes the material that enters valve body 1 all discharge, avoids material residence in valve body 1 and influences the subsequent production, improves the production continuity and utilization rate of product line, reduces operating cost.

[0017] And for improving the corrosion -resistant performance of tank bottom valve, all valve body 1, valve stem 3, valve core 2 that can contact material are made of hastelloy, valve core 2 includes plug 21, sealing washer 22 and support seat 23 that are sequentially stacked, plug 21 is matched with feed inlet 12 inner diameter, the outer diameter of sealing washer 22 is greater than plug 21 but less than support seat 23, one end of valve stem 3 passes through support seat 23 and sealing washer 22 and is fixedly connected with plug 21, and under the drive of open and close mechanism 4, plug 21 can block feed inlet 12, and support seat 23 extrudes sealing washer 22 to make sealing washer 22 and valve cavity 11 side wall completely seal feed inlet 12. In the use, open and close mechanism 4 drives valve stem 3 to displace upwards, and valve stem 3 will drive support seat 23, sealing washer 22 and plug 21 to displace upwards, and make plug 21 block feed inlet 12 in valve body 1, simultaneously, support seat 23 will extrude sealing washer 22, make sealing washer 22 and valve cavity 11 inner wall fit, thereby make valve form closed seal. When needing to discharge material, open and close mechanism 4 then drives valve stem 3 to displace reversely downwards, and drive support seat 23, sealing washer 22 and plug 21 to separate feed inlet 12 in valve body 1, like this, the material in tank body enters valve cavity 11 under the double action of tank pressure and material gravity, and is discharged through valve cavity 11 and discharge port.

[0018] When discharging material, to prevent plug 21 end face to stay material, the face of plug 21 that contacts tank body interior is arc surface 211, make the center of plug 21 higher than the edge. By setting plug 21 end face as arc surface 211, material contacts plug 21 end face will automatically slide along plug 21 arc surface 211 under the action of gravity, thereby effectively prevent plug 21 end face to form material residence, maximum degree realizes the non-residence material characteristics of valve body 1.

[0019] In order to improve the sealing performance of the connection between the valve stem 3 and the valve core 2, a double-layer sealing ring 31 is arranged at the connection between the valve stem 3 and the valve core 2, and the end of the valve stem 3 connected with the valve core 2 is tapered. The double-layer sealing ring 31 is arranged between the valve stem 3 and the support seat 23, and a double-layer seal is formed between the support seat 23 and the plug 21. The end of the valve stem 3 connected with the valve core 2 is tapered, which can make the sealing point of the valve core 2 more concentric. When the valve stem 3 drives the valve core 2 to block the feed port 12 of the valve body 1, the sealing performance is more effective.

[0020] In order to prevent the sealing performance of the valve stem 3 and the control port 13 in the valve body 1, a sealing packing 5 and a pressure regulating plate 6 extruding the sealing packing 5 are arranged at the control port 13 of the valve body 1. The valve stem 3 is dynamically sealed with the sealing packing 5 and penetrates through the pressure regulating plate 6 at one end to be connected and fixed with the opening and closing mechanism 4. By arranging the pressure regulating plate 6 and the sealing packing 5 in the control port 13, the sealing packing 5 can dynamically seal the valve stem 3 when the valve stem 3 penetrates through the control port 13. When the sealing packing 5 decays and causes leakage, the bolt fixing the pressure regulating plate 6 can be adjusted to extrude the sealing packing 5 by the pressure regulating plate 6, so as to ensure the dynamic sealing performance between the valve stem 3 and the valve body 1. The pressure regulating plate 6 is fixed on the valve body 1 by bolts, so that the sealing performance of the sealing packing 5 can be adjusted by the pressure regulating plate 6.

[0021] In order to ensure the coaxiality during opening, avoid misplacement or torsion affecting the opening and closing of the valve, a support frame 7 is arranged between the valve body 1 and the opening and closing mechanism 4, and a guide strip 8 is arranged at the opposite position of the support frame 7. A sliding block 9 is detachably fixed on the valve stem 3, and the two ends of the sliding block 9 are respectively matched with the guide strips 8. By arranging the guide strips 8 on the support frame 7 and the detachable sliding block 9 on the valve stem 3, when the opening and closing mechanism 4 drives the valve stem 3 to displace upward and downward, the guide strips 8 can guide the sliding block 9, so as to ensure the coaxiality of the valve stem 3 with the valve cavity 11 during upward and downward displacement, prevent misplacement or torsion affecting the opening and closing of the valve core 2 or increasing the operation torque of the opening and closing mechanism 4. When the sliding block 9 is installed, the position of the sliding block 9 fixed on the valve stem 3 can be determined by the stroke of the valve stem 3. When the valve stem 3 displaces upward and downward, the sliding block 9 can contact the support frame 7 or the valve body 1 to control the optimal closing stroke and the maximum opening stroke, so as to ensure the safety of the valve and prevent the valve core 2 from being damaged by excessive opening or closing.

[0022] In order to reduce the operating torque of the opening and closing mechanism 4, a fixed plate 71 is arranged on the support frame 7, and a shaft hole 72 is arranged on the fixed plate 71, the threaded shaft sleeve 10 passes through the shaft hole 72, and bearings 73 are arranged on both sides of the threaded shaft sleeve 10 and the shaft hole 72 respectively; the opening and closing mechanism 4 is fixedly connected with the threaded shaft sleeve 10, an outer thread is arranged on at least a partial outer circumferential side wall of one end of the valve rod 3 and is screwed with the threaded shaft sleeve 10, and when the opening and closing mechanism 4 is driven to rotate in the forward and reverse directions, the valve rod 3 can be driven to displace upward and downward along the threaded shaft sleeve 10 to make the valve core 2 open or block the feed inlet 12 in the valve body 1. By arranging two bearings 73 on the threaded shaft sleeve 10, when the opening and closing mechanism 4 is rotated to drive the threaded shaft sleeve 10 to rotate in the forward and reverse directions to drive the valve rod 3 to displace upward and downward, the operating torque can be obviously reduced, and the opening or closing of the valve is more relaxed and rapid. The opening and closing mechanism 4 is a hand wheel in actual production.

[0023] In order to prevent sundries or dust from entering the threaded shaft sleeve 10 to affect the upward and downward displacement of the valve rod 3, a dust cover 32 is arranged at the end of the threaded shaft sleeve 10, the dust cover 32 covers the port of the threaded shaft sleeve 10, so that the dust or sundries cannot enter the threaded shaft sleeve 10, thereby effectively ensuring the spiral upward and downward displacement of the valve rod 3 and improving the smoothness of the opening and closing of the valve.

[0024] The above embodiments should not be regarded as a limitation of the utility model, but any improvement based on the spirit of the utility model should be within the protection scope of the utility model.

Claims

1. A corrosion-resistant tank bottom valve with no residue, comprising a valve body, a valve core, a valve stem, and an opening and closing mechanism, wherein the valve body has a valve cavity and an inlet, a control port, and a discharge pipe respectively connected to the valve cavity; one end of the valve core is connected to the valve stem, and the other end passes through the valve cavity and the control port and is placed outside the valve body to be connected to the opening and closing mechanism; characterized in that... The valve cavity has a hemispherical bottom. The discharge pipe is installed on the side of the valve body, and its inner circumferential edge is tangent to and connected to the lowest point of the hemispherical bottom. The valve core includes a plug, a sealing gasket, and a support seat stacked in sequence. The plug matches the inner diameter of the feed inlet. The outer diameter of the sealing gasket is larger than the plug but smaller than the support seat. One end of the valve stem passes through the support seat and the sealing gasket and is fixedly connected to the plug. Under the drive of the opening and closing mechanism, the plug can block the feed inlet, and the support seat squeezes the sealing gasket so that the sealing gasket fits against the side wall of the valve cavity and completely seals the feed inlet.

2. The non-retention corrosion-resistant tank bottom valve according to claim 1, characterized in that... The surface of the plug that contacts the inside of the tank is curved, so that the center of the plug is higher than the edge.

3. The non-retention corrosion-resistant tank bottom valve according to claim 1, characterized in that... The valve stem and valve core are connected by a double-layer sealing ring, and the end of the valve stem that connects to the valve core is tapered.

4. The non-retention corrosion-resistant tank bottom valve according to claim 1, characterized in that... An adjustable pressure plate for sealing packing and extruded sealing material is provided at the control port of the valve body. The valve stem is dynamically sealed with the sealing packing and one end passes through the adjustable pressure plate to be connected and fixed to the opening and closing mechanism.

5. The non-retention corrosion-resistant tank bottom valve according to claim 1, characterized in that... A support frame is provided between the valve body and the opening and closing mechanism, and guide bars are provided at opposite positions on the support frame; a slider is detachably fixed outside the valve stem, and the two ends of the slider are respectively engaged with the guide bars.

6. The non-retention corrosion-resistant tank bottom valve according to claim 5, characterized in that... A fixed plate is provided on the support frame, and a shaft hole is provided on the fixed plate. A threaded bushing passes through the shaft hole, and bearings are provided on both sides of the bushing and the shaft hole. The opening and closing mechanism is fixedly connected to the threaded bushing. At least part of the outer peripheral side wall of one end of the valve stem is provided with an external thread, which passes through the threaded bushing and is threadedly connected to the threaded bushing. When the opening and closing mechanism is driven to rotate in the forward and reverse directions by an external force, it can drive the valve stem to move up and down along the threaded bushing to open the valve core or block the feed port in the valve body.

7. The non-retention corrosion-resistant tank bottom valve according to claim 6, characterized in that... A dust cover is provided at the end of the threaded bushing.

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