Low-temperature gate valve

Abstract

The low-temperature gate valve comprises a valve body, a valve plate, a valve rod, a connecting shaft, a transmission part, a hand wheel and a locking assembly, the valve rod is coaxially embedded in the valve body in a sliding mode, the valve plate is connected to the valve rod to achieve on-off of the valve body, the connecting shaft is rotationally connected to the valve body, the transmission part is connected between the connecting shaft and the valve rod, and the hand wheel is provided with a containing groove; the connecting shaft is embedded in the containing groove, a transmission block is connected to the groove wall of the containing groove, a transmission groove is formed in the periphery of the connecting shaft, a rotating ring groove is formed in the periphery of the connecting shaft, the rotating ring groove communicates with the transmission groove, and the locking assembly is connected between the hand wheel and the connecting shaft. When the hand wheel needs to drive the valve rod to slide, the transmission block is embedded into the transmission groove to achieve circumferential fixation of the hand wheel and the connecting shaft, after adjustment is completed, the transmission block is embedded into the rotating ring groove to achieve relative rotation of the hand wheel and the connecting shaft, and other people are effectively prevented from directly operating the gate valve by mistake through the hand wheel. And the safety and the reliability of the gate valve in an outdoor installation environment are improved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and particularly to a cryogenic gate valve. Background Art

[0002] A cryogenic gate valve is a valve used to control the flow of fluids in a cryogenic environment. It usually consists of components such as a valve body, seals, and operating mechanisms. As an important fluid control device, cryogenic gate valves are widely used in fields such as liquefied natural gas, aerospace, nuclear energy, metallurgy, and chemical engineering.

[0003] The characteristics of cryogenic gate valves include high tolerance, good sealing performance, unobstructed flow channels, compact structure, long service life, and convenient maintenance. It can withstand high pressures and large temperature differences in extreme cryogenic environments, ensuring the safe operation of the system. In addition, cryogenic gate valves also have very high sealing performance, effectively avoiding medium leakage. This is crucial for flammable, explosive, toxic, and harmful media such as liquefied natural gas.

[0004] Some cryogenic gate valves are installed outdoors and connected to pipelines. Since others can directly drive the handwheel on the gate valve to control the opening and closing of the cryogenic gate valve, the safety of the cryogenic gate valve installed outdoors cannot be improved, and it is easy to cause losses due to the accidental opening or closing of the cryogenic gate valve. Summary of the Invention

[0005] In order to prevent others from directly controlling the opening and closing of the gate valve through the handwheel and improve the reliability of the gate valve, this application provides a cryogenic gate valve.

[0006] A cryogenic gate valve provided by this application adopts the following technical solution: A cryogenic gate valve includes a valve body, a valve plate, a valve stem, a connecting shaft, a transmission component, a handwheel, and a locking component. The valve stem is coaxially and slidably embedded in the valve body. The valve plate is connected to one end of the valve stem to achieve the opening and closing of the valve body. The connecting shaft is rotatably connected to the valve body. The rotation axis of the connecting shaft is perpendicular to the sliding direction of the valve body. The transmission component is connected between the connecting shaft and the valve stem. The handwheel is provided with a receiving groove. One end of the connecting shaft is coaxially and slidably embedded in the receiving groove. A transmission block is connected to the wall of the receiving groove. A transmission groove is provided on the outer periphery of the connecting shaft. The transmission block is slidably embedded in the transmission groove. A rotating ring groove is provided on the outer periphery of the connecting shaft. The rotating ring groove is communicated with the transmission groove. The transmission block is rotatably embedded in the rotating ring groove. The locking component is connected between the handwheel and the connecting shaft to achieve the relative fixation of the handwheel and the connecting shaft along the axis direction of the connecting shaft.

[0007] By adopting the above technical scheme, the handwheel and the connecting shaft are relatively fixed along the rotation axis direction of the connecting shaft through the locking component. When the valve stem needs to be driven to slide by the handwheel, the transmission block is embedded in the transmission groove to achieve circumferential fixation of the handwheel and the connecting shaft. When the adjustment is completed, the transmission block is embedded in the rotating ring groove to achieve relative rotation of the handwheel and the connecting shaft, which effectively prevents others from mistakenly operating the gate valve directly through the handwheel, thereby improving the safety and reliability of the gate valve in outdoor installation environments.

[0008] Preferably, the locking assembly includes a clamp, one end of which is rotatably connected to a side of the handwheel close to the valve body, the rotation axis of the clamp is parallel to the axis of the connecting shaft, two clamps are provided, and the two clamps are symmetrically distributed along a direction perpendicular to the axis of the connecting shaft, a fixing ring groove is provided on the outer periphery of the connecting shaft, the fixing ring groove is used for the clamp to be embedded, and two fixing ring grooves are provided, and the two fixing ring grooves are spaced apart along the axis of the connecting shaft.

[0009] By adopting the above technical solution, the two hoops are rotatably connected to the handwheel, and the hoops are embedded in the fixed ring groove, so as to realize the fixed connection between the handwheel and the connecting shaft along the rotation axis direction of the connecting shaft, thereby improving the stability of the connection between the handwheel and the connecting shaft, reducing the possibility of the handwheel and the connecting shaft being detached during use, and improving the safety of the gate valve.

[0010] Preferably, it also includes an unlocking magnetic block, and the locking assembly also includes an embedding block, a fixed magnetic block and a first connecting magnetic block. A connecting column is connected to a side surface of the end of the clamp away from the rotation axis of the clamp close to the other clamp, and the clamp is provided with a connecting groove, and the connecting groove is used for the connecting column of the other clamp to be embedded. The number of the embedding block, the fixed magnetic block and the locking magnetic block is the same as the number of the clamp and corresponds to one another. The embedding block is slidably connected to the connecting column, and the rotation axis of the embedding block is perpendicular to the rotation axis of the clamp. A locking groove is provided at the groove wall on the side of the connecting groove away from the connecting shaft, and the locking groove is used for the embedding block to be embedded. A groove is provided at the groove wall on the side of the connecting groove close to the connecting shaft, and the fixed magnetic block is embedded in the groove. The first connecting magnetic block is connected to the embedding block, and the fixed magnetic block and the first connecting magnetic block repel each other to drive the embedding block to be embedded in the locking groove. A first mounting groove is provided on the outer periphery of the clamp, and the first mounting grooves of the two clamps are connected. The unlocking magnetic block is used to be embedded in the first mounting groove, and the unlocking magnetic block and the first connecting magnetic block repel each other to drive the embedding block to be separated from the locking groove.

[0011] By adopting the above technical solution, when the connecting column is embedded in the connecting groove, the first connecting magnetic block and the fixed magnetic block repel each other, pushing the embedded block to be embedded in the locking groove, thereby realizing a fixed connection between the two hoops. When unlocking is required, the unlocking magnetic block is embedded in the first installation groove and repel each other with the first connecting magnetic block, driving the embedded block to be separated from the locking groove, releasing the locking state between the two hoops, thereby improving the safety and reliability of the gate valve when installed outdoors.

[0012] Preferably, an unlocking hole is provided at the bottom of the first installation slot, and the unlocking hole is communicated with the locking slot.

[0013] By adopting the above technical solution, when the unlocking magnetic block is lost, a metal rod or other hard cylinder is passed through the unlocking hole to push the insert out of the locking groove, thereby releasing the locking state between the two hoops, thereby improving the convenience and service life of the gate valve.

[0014] Preferably, it also includes a sliding ring, a second connecting magnet and a second reset member, a sliding groove is provided on the wall of the accommodating groove, the sliding ring is slidably embedded in the sliding groove, the sliding direction of the sliding ring is parallel to the axial direction of the connecting shaft, the transmission block is connected to the sliding ring, the rotating ring groove is located on the side of the transmission groove away from the bottom of the accommodating groove, the second connecting magnet is connected to the sliding ring, and a second mounting groove is provided on the side of the handwheel away from the valve body, the second mounting groove is used for embedding an unlocking magnet, the unlocking magnet and the second connecting magnet attract each other, the second reset member is connected between the sliding ring and the handwheel, and the second reset member makes the sliding ring have a tendency to approach the valve body, and when the hoop is embedded in the fixed ring groove close to the side of the valve body and the unlocking magnet is not embedded in the second mounting groove, the transmission block is embedded in the rotating ring groove.

[0015] By adopting the above technical solution, when the two hoops are embedded in the fixed ring groove close to one side of the valve body, the unlocking magnetic block can be embedded in the second installation groove, the unlocking magnetic block and the second connecting magnetic block attract each other, and the driving sliding ring overcomes the elastic force of the second reset member and drives the transmission block to be embedded in the transmission groove, thereby realizing the circumferential fixation of the handwheel and the connecting shaft, so as to facilitate the opening and closing of the gate valve by the handwheel, thereby improving the convenience of the gate valve.

[0016] Preferably, the transmission groove is provided with first chamfers at the groove walls on both sides close to one end of the rotating ring groove, and the first chamfers are used to abut against the transmission block.

[0017] By adopting the above technical solution, a first chamfer is provided at one end of the transmission groove close to the rotating ring groove. The first chamfer guides the transmission block, making it easier for the transmission block to be embedded in the transmission groove.

[0018] Preferably, a first indicator mark is provided on a side of the hand wheel away from the valve body, and a second indicator mark is provided on the outer periphery of the connecting shaft, and the first indicator mark corresponds to the second indicator mark.

[0019] By adopting the above technical solution, the operator observes the relative positions of the first indicator mark and the second indicator mark. When the first indicator mark is aligned with the second indicator mark, the operator is prompted that the transmission groove and the transmission block are facing each other, thereby improving the convenience of gate valve operation.

[0020] Preferably, it further includes a valve cover, a bracket and a protective cover. The upper end of the valve body is provided with a receiving cavity, and the bottom of the receiving cavity is provided with a connecting cavity. Liquid inlet channels and liquid outlet channels are respectively arranged on the two side walls of the connecting cavity perpendicular to the rotation axis of the valve stem. The valve cover is connected to the valve body and covers the opening of the receiving cavity. The bracket is connected to the end of the valve cover away from the valve body, and the protective cover is connected to the end of the bracket away from the valve cover. The transmission component and the connecting shaft are embedded in the protective cover. The valve plate is slidably embedded in the receiving cavity. One end of the valve stem is connected to the valve plate, and the other end of the valve stem sequentially passes through the valve cover and the bracket and extends into the protective cover.

[0021] By adopting the above technical solutions, the valve cover is connected to the valve body and the bracket is connected to the valve cover, which facilitates the disassembly of the valve body, the valve cover and the bracket to take out the valve stem and the valve plate for maintenance or replacement. The transmission component and the connecting shaft are embedded in the protective cover, reducing the possibility of damage to the transmission component or the connecting shaft caused by external objects hitting the transmission component or the connecting shaft, and improving the service life of the gate valve.

[0022] Preferably, it further includes a sealing washer, a packing gasket, a packing block, a packing gland and a packing plate. The upper end of the valve body is provided with a first sealing groove, and one end of the valve cover close to the valve body is provided with a second sealing groove. The sealing washer is embedded in the first sealing groove and the second sealing groove. One end of the bracket close to the valve cover is connected with a convex ring. The end of the valve cover away from the valve body is provided with a third sealing groove. The convex ring is embedded in the third sealing groove. The bracket is provided with a second communication hole. The valve stem is embedded in the second communication hole. A fourth sealing groove is provided on the hole wall at the end of the second communication hole away from the valve cover. The packing gasket, the packing block and the packing gland are sequentially embedded in the fourth sealing groove. The packing plate is connected to the bracket, and the packing plate abuts against the end of the packing gland away from the valve cover.

[0023] By adopting the above technical solutions, the sealing washer is embedded in the first sealing groove and the second sealing groove, reducing the possibility of liquid leakage from the connection between the valve body and the valve cover in the gate valve. The convex ring is embedded in the third sealing groove, forming a labyrinth seal between the valve cover and the bracket, reducing the possibility of liquid leakage from the connection between the valve cover and the bracket in the gate valve. The packing gasket, the packing block and the packing gland are sequentially embedded in the fourth sealing groove, and the packing plate abuts against the end of the packing gland away from the valve cover, thereby forming a multi-stage sealing structure between the valve stem and the bracket, reducing the possibility of liquid leakage from the connection between the bracket and the valve stem in the gate valve, and improving the sealing performance of the gate valve.

[0024] Preferably, a crank is connected to the side of the handwheel away from the valve body.

[0025] By adopting the above technical solutions, a crank is connected to the side of the handwheel away from the valve body, enabling the user to apply a greater torque with the help of the crank when operating the handwheel, easily realizing the opening and closing of the gate valve, and improving the convenience and practicality of the gate valve.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. The handwheel and the connecting shaft are relatively fixed along the direction of the connecting shaft's rotation axis through the locking assembly. When the handwheel is needed to drive the valve stem to slide, the transmission block is embedded in the transmission groove to achieve circumferential fixation of the handwheel and the connecting shaft. When the adjustment is completed, the transmission block is embedded in the rotating ring groove to achieve relative rotation of the handwheel and the connecting shaft, effectively preventing others from misoperating the gate valve directly through the handwheel, and improving the safety and reliability of the gate valve in outdoor installation environments; 2. The two hoops are rotatably connected to the handwheel, and the hoops are embedded in the fixed ring groove to achieve a fixed connection between the handwheel and the connecting shaft along the rotation axis direction of the connecting shaft, thereby improving the stability of the connection between the handwheel and the connecting shaft and reducing the possibility of the handwheel and the connecting shaft being separated during use. When the connecting column is embedded in the connecting groove, the first connecting magnetic block and the fixed magnetic block repel each other, pushing the embedded block to be embedded in the locking groove to achieve a fixed connection between the two hoops. When unlocking is required, the unlocking magnetic block is embedded in the first installation groove and repel each other with the first connecting magnetic block, driving the embedded block to be separated from the locking groove, releasing the locking state between the two hoops, and improving the safety and reliability of the gate valve when it is installed outdoors; 3. When the two hoops are embedded in the fixed ring groove close to the valve body, the unlocking magnetic block can be embedded in the second installation groove. The unlocking magnetic block and the second connecting magnetic block attract each other, and the driving sliding ring overcomes the elastic force of the second reset member and drives the transmission block to be embedded in the transmission groove, so as to realize the circumferential fixation of the handwheel and the connecting shaft, so as to facilitate the opening and closing of the gate valve by the handwheel, thereby improving the convenience of the gate valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a partial cross-sectional view of a cryogenic gate valve.

[0028] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0029] Figure 3 yes Figure 1 Enlarged view of point B in the middle.

[0030] Figure 4 It is a cross-sectional view of the valve body.

[0031] Figure 5 It is a cross-sectional view of the valve plate.

[0032] Figure 6 yes Figure 1 Enlarged view of point C in the middle.

[0033] Figure 7 It is a partial cross-sectional view of the protective cover and operating mechanism.

[0034] Figure 8 yes Figure 7Enlarged view of location D in [the figure].

[0035] Figure 9 It is a partial sectional view of the operating mechanism.

[0036] Figure 10 Is Figure 9 Enlarged view of location E in [the figure].

[0037] Explanation of reference numerals in the drawings: 1. Gate valve body; 11. Sealing gasket; 12. Valve body; 121. Accommodating cavity; 122. Connecting cavity; 123. Connecting pipe; 124. First connecting ring; 1241. First connecting hole; 125. Liquid inlet channel; 126. Liquid outlet channel; 127. Second connecting ring; 1271. Second connecting hole; 128. First sealing groove; 129. Abutting ring; 1210. Guide strip; 13. Valve cover; 131. Third connecting hole; 132. Second sealing groove; 133. Extension pipe; 134. Fourth connecting ring; 1341. Fourth connecting hole; 1342. Third sealing groove; 135. First communication hole; 14. First connecting stud; 15. First connecting nut; 16. Bracket; 161. Mounting seat; 1611. Second communication hole; 1612. Fourth sealing groove; 162. Fifth connecting ring; 1621. Fifth connecting hole; 1622. Rib; 163. Connecting rod; 164. Sixth connecting ring; 1641. Sixth connecting hole; 165. Hinge seat; 1651. Hinge groove; 17. Second connecting stud; 18. Second connecting nut; 19. Protective cover; 191. Fixing hole; 110. Third connecting stud; 111. Third connecting nut; 112. Packing gasket; 113. Packing block; 114. Packing gland; 1141. Third chamfer; 115. Packing pressing plate; 1151. Third communication hole; 1152. Second chamfer; 1153. Ear plate; 11531. Seventh connecting hole; 116. Fourth connecting stud; 117. Fourth connecting nut; 2. Valve plate; 21. Guide groove; 22. Fixed groove; 23. Limiting strip; 3. Valve stem; 31. Limiting groove; 4. Operating mechanism; 41. Connecting shaft; 411. Transmission groove; 412. Rotating ring groove; 413. First chamfer; 414. Fixed ring groove; 415. Second indication mark; 42. Handwheel; 421. Sleeve; 4211. Accommodating groove; 4212. Chute; 4213. Guide groove; 4214. First indication mark; 4215. Second installation groove; 4216. Rotating column; 422. Wheel disc; 423. Spoke; 424. Crank; 43. Sliding ring; 431. Transmission block; 432. Guide block; 44. Second connecting magnet; 45. Second reset member; 46. Unlocking magnet; 47. Locking assembly; 471. Hoop; 4711. Connecting column; 47111. Embedding groove; 4712. Connecting groove; 4713. Locking groove; 4714. Groove; 4715. First installation groove; 4716. Unlocking hole; 472. Insert block; 473. Fixed magnet; 474. First connecting magnet; 475. First reset member. Detailed implementation manners

[0038] The present application will be further described in detail below with reference to the accompanying drawings.

[0039] Referring to Figure 1 , an embodiment of the present application discloses a cryogenic gate valve, which includes a gate valve body 1. The gate valve body 1 includes a valve body 12. An accommodating cavity 121 is provided at the upper end of the valve body 12, and a connecting cavity 122 is provided at the bottom of the accommodating cavity 121. A connecting pipe 123 is fixedly connected to the outer wall of the valve body 12. The axis of the connecting pipe 123 is perpendicular to the axis of the valve body 12. There are two connecting pipes 123, and the two connecting pipes 123 are symmetrically distributed along the axis of the connecting pipe 123. A first connecting ring 124 is coaxially fixedly connected to the outer periphery of the connecting pipe 123 away from the valve body 12. The first connecting ring 124 is provided with a plurality of first connecting holes 1241, and the plurality of first connecting holes 1241 are circumferentially and uniformly distributed around the axis of the first connecting ring 124. In this embodiment, there are twelve first connecting holes 1241. The two connecting pipes 123 are respectively provided with a liquid inlet channel 125 and a liquid outlet channel 126 coaxially. The liquid inlet channel 125 and the liquid outlet channel 126 communicate with the outside and the connecting cavity 122.

[0040] Referring to Figure 1 and Figure 2, the gate valve body 1 further includes a valve cover 13, first connection studs 14, first connection nuts 15 and a sealing washer 11. The valve cover 13 is connected to the valve body 12 and covers the orifice of the accommodating cavity 121. A second connection ring 127 is coaxially and fixedly connected to the outer periphery of the upper end of the valve body 12, and the outer wall of the second connection ring 127 is flush with the outer wall of the valve cover 13. The second connection ring 127 is provided with a plurality of second connection holes 1271, and the plurality of second connection holes 1271 are circumferentially and evenly distributed around the axis of the second connection ring 127. In this embodiment, there are sixteen second connection holes 1271. The valve cover 13 is provided with third connection holes 131. The number of the third connection holes 131 and the first connection studs 14 is the same as the number of the second connection holes 1271 and they correspond to each other one by one. The first connection studs 14 are embedded in the second connection holes 1271 and the third connection holes 131. One first connection stud 14 corresponds to two first connection nuts 15, and the two first connection nuts 15 are threadedly connected to the first connection stud 14. The two first connection nuts 15 respectively abut against the surface of the second connection ring 127 away from the valve cover 13 and the surface of the valve cover 13 away from the valve body 12. A first sealing groove 128 is coaxially provided at the upper end of the valve body 12, and the first sealing groove 128 is arranged around the orifice of the accommodating cavity 121. A second sealing groove 132 is provided on the surface of the valve cover 13 close to the valve body 12. In this embodiment, one end of the inner and outer side walls of the first sealing groove 128 close to the bottom of the first sealing groove 128 is inclined towards the side close to the other side wall of the first sealing groove 128, and one end of the inner and outer side walls of the second sealing groove 132 close to the bottom of the second sealing groove 132 is inclined towards the side close to the other side wall of the second sealing groove 132. The sealing washer 11 is embedded in the first sealing groove 128 and the second sealing groove 132, and the outer wall of the sealing washer 11 abuts against the walls of the first sealing groove 128 and the second sealing groove 132. In this embodiment, the cross-section of the sealing washer 11 is oval.

[0041] Refer to Figure 1 and Figure 3, the gate valve body 1 further includes a bracket 16, a second connecting stud 17, and a second connecting nut 18. A lengthening pipe 133 is coaxially and fixedly connected to the surface of the valve cover 13 away from the valve body 12. A fourth connecting ring 134 is coaxially and fixedly connected to the outer periphery of the end of the lengthening pipe 133 away from the valve cover 13. The diameter of the fourth connecting ring 134 is smaller than the diameter of the valve cover 13. The bracket 16 includes a mounting seat 161, and the mounting seat 161 is fixedly connected to the end of the lengthening pipe 133 away from the valve cover 13. A fifth connecting ring 162 is coaxially and fixedly connected to the outer periphery of the end of the mounting seat 161 close to the lengthening pipe 133. The outer wall of the fifth connecting ring 162 is flush with the outer wall of the fourth connecting ring 134. The fourth connecting ring 134 is provided with a plurality of fourth connecting holes 1341, and the plurality of fourth connecting holes 1341 are circumferentially and evenly distributed around the axis of the fourth connecting ring 134. In this embodiment, there are eight fourth connecting holes 1341. The fifth connecting ring 162 is provided with fifth connecting holes 1621. The number of the fifth connecting holes 1621 and the second connecting studs 17 is the same as the number of the fourth connecting holes 1341 and they correspond one by one. The second connecting studs 17 are embedded in the fourth connecting holes 1341 and the fifth connecting holes 1621. One second connecting stud 17 corresponds to two second connecting nuts 18. The two second connecting nuts 18 are threadedly connected to the second connecting stud 17, and the two second connecting nuts 18 respectively abut against the surface of the fourth connecting ring 134 away from the fifth connecting ring 162 and the surface of the fifth connecting ring 162 away from the fourth connecting ring 134. A third sealing groove 1342 is coaxially provided on the surface of the fourth connecting ring 134 close to the fifth connecting ring 162. A convex strip 1622 is coaxially and fixedly connected to the surface of the fifth connecting ring 162 close to the fourth connecting ring 134. The convex strip 1622 is annular, and the axis of the convex strip 1622 coincides with the axis of the fifth connecting ring 162. The convex strip 1622 is embedded in the third sealing groove 1342, and the side wall of the convex strip 1622 is in contact with the groove wall of the third sealing groove 1342.

[0042] The gate valve body 1 further includes a protective cover 19, a third connecting stud 110, and a third connecting nut 111. The bracket 16 further includes a connecting rod 163 and a sixth connecting ring 164. The sixth connecting ring 164 is embedded on the side of the mounting seat 161 away from the extension pipe 133. The axis of the sixth connecting ring 164 coincides with the axis of the mounting seat 161, and the diameter of the sixth connecting ring 164 is larger than the diameter of the fifth connecting ring 162. The lower end of the connecting rod 163 is fixedly connected to the outer periphery of one end of the mounting seat 161 away from the extension pipe 133, and the upper end of the connecting rod 163 is fixedly connected to the surface of the sixth connecting ring 164 close to the mounting seat 161. There are two connecting rods 163, and the two connecting rods 163 are circumferentially spaced apart around the axis of the mounting seat 161, and the two connecting rods 163 are symmetrically distributed perpendicular to the axis of the mounting seat 161. The protective cover 19 is fixedly connected to the surface of the sixth connecting ring 164 away from the mounting seat 161. The sixth connecting ring 164 is provided with a number of sixth connecting holes 1641, and the number of the sixth connecting holes 1641 is evenly distributed circumferentially around the axis of the sixth connecting ring 164. In this embodiment, there are eight sixth connecting holes 1641. The end of the protective cover 19 close to the sixth connecting ring 164 is provided with a fixing hole 191. The number of the fixing holes 191, the third connecting studs 110, and the third connecting nuts 111 is the same as the number of the sixth connecting holes 1641 and they correspond one by one. One end of the third connecting stud 110 passes through the sixth connecting hole 1641 and is threadedly connected to the fixing hole 191, and the third connecting nut 111 is threadedly connected to the third connecting stud 110, and the third connecting nut 111 abuts against the surface of the sixth connecting ring 164 away from the protective cover 19.

[0043] Referring to Figure 1 and Figure 4 A cryogenic gate valve further includes a valve plate 2. Abuttment rings 129 are respectively fixedly connected to the two side walls of the connection cavity 122 near the liquid inlet passage 125 or the liquid outlet passage 126. The axis of the abutment ring 129 coincides with the axis of the liquid outlet passage 126, and the side of the abutment ring 129 away from the valve cover 13 is inclined towards the side close to the other abutment block. The lower end of the valve plate 2 is slidably embedded in the connection cavity 122 to realize the on-off of the liquid inlet passage 125 and the liquid outlet passage 126. The sliding direction of the valve plate 2 is parallel to the axis direction of the valve body 12. The two side surfaces of the valve plate 2 along the axis direction of the liquid outlet passage 126 are respectively used to abut against the surfaces of the two abutment rings 129 close to the other abutment ring 129. Guide bars 1210 are fixedly connected to the wall of the connection cavity 122. The length direction of the guide bars 1210 is parallel to the sliding direction of the valve plate 2. There are two guide bars 1210, and the two guide bars 1210 are symmetrically distributed perpendicular to the axis direction of the liquid outlet passage 126.

[0044] Referring to Figure 5, a guide groove 21 is provided on the side wall of the valve plate 2. The number of the guide grooves 21 is the same as and corresponds one by one to the number of the guide bars 1210. The guide bars 1210 are slidably embedded in the guide grooves 21, and the side walls of the guide bars 1210 are in contact with the groove walls of the guide grooves 21.

[0045] Referring to Figure 1 and Figure 6 , a cryogenic gate valve further includes a valve stem 3. A fixing groove 22 is provided on one side of the valve plate 2 close to the valve cover 13. The fixing groove 22 penetrates through the valve plate 2 along both ends perpendicular to the liquid outlet channel 126. The lower end of the valve stem 3 is embedded in the fixing groove 22, and the side wall of the valve stem 3 is in contact with the groove wall of the fixing groove 22. In this embodiment, the cross-section of the valve stem 3 close to the valve plate 2 is waist-shaped. A limiting strip 23 is fixedly connected to the groove wall of the fixing groove 22 close to the valve cover 13. There are two limiting strips 23, and the two limiting strips 23 are symmetrically distributed along the axis of the liquid outlet channel 126. A limiting groove 31 is provided on the outer periphery of the valve stem 3. The number of the limiting grooves 31 is the same as and corresponds one by one to the number of the limiting strips 23. The limiting strips 23 are embedded in the limiting grooves 31, and the side walls of the limiting strips 23 are in contact with the groove walls of the limiting grooves 31. A first communication hole 135 is coaxially provided at one end of the valve cover 13 close to the valve body 12. The first communication hole 135 sequentially penetrates through the valve cover 13 and the extension pipe 133 along the axis of the valve cover 13. The mounting seat 161 is coaxially provided with a second communication hole 1611. The inner diameter of the sixth connecting ring 164 is greater than the diameter of the second communication hole 1611 and less than the outer diameter of the mounting seat 161. The upper end of the valve stem 3 passes through the first communication hole 135 and the second communication hole 1611 in sequence and then extends into the protective cover 19. In this embodiment, the diameter of the first communication hole 135 is smaller than the diameter of the valve stem 3, and the hole wall of the second communication hole 1611 is in contact with the outer wall of the valve stem 3.

[0046] Referring to Figure 3 , the gate valve body 1 further includes a packing gasket 112, a packing block 113, a packing gland 114 and a packing pressing plate 115. A fourth sealing groove 1612 is provided on the hole wall at one end of the second communication hole 1611 away from the extension pipe 133. The packing gasket 112, the packing block 113 and the packing gland 114 are sequentially embedded in the fourth sealing groove 1612. The outer walls of the packing gasket 112, the packing block 113 and the packing gland 114 are in contact with the groove wall of the fourth sealing groove 1612, and the inner walls of the packing gasket 112 and the packing block 113 are tightly pressed against the outer wall of the valve stem 3. The packing pressing plate 115 is connected to one side of the mounting seat 161 away from the extension pipe 133. The packing pressing plate 115 is coaxially provided with a third communication hole 1151. The valve stem 3 is coaxially and slidably embedded in the third communication hole 1151. The lower end of the packing pressing plate 115 abuts against one end of the packing gland 114 away from the packing block 113. A second chamfer 1152 is provided on the hole wall of the third communication hole 1151 close to the mounting seat 161. A third chamfer 1141 is provided on the outer periphery of one end of the packing gland 114 away from the packing block 113. The third chamfer 1141 is used to abut against the second chamfer 1152.

[0047] Referring toFigure 1 and Figure 3 , a hinge seat 165 is fixedly connected to the side wall of the mounting seat 161. There are two hinge seats 165. The two hinge seats 165 are circumferentially spaced along the axis of the mounting seat 161. The two hinge seats 165 are symmetrically distributed perpendicular to the axis of the mounting seat 161. There is one hinge seat 165 between the two connecting rods 163. An ear plate 1153 is fixedly connected to the outer wall of the end of the packing pressing plate 115 away from the mounting seat 161. The gate valve body 1 further includes a fourth connecting stud 116 and a fourth connecting nut 117. The numbers of the ear plate 1153, the fourth connecting stud 116 and the fourth connecting nut 117 are the same as the number of the hinge seats 165 and correspond one by one. The hinge seat 165 is provided with a hinge groove 1651. One end of the fourth connecting stud 116 is rotatably embedded in the hinge groove 1651. The rotation axis of the fourth connecting stud 116 is perpendicular to the axis of the mounting seat 161. The ear plate 1153 is provided with a seventh connecting hole 11531. The other end of the fourth connecting stud 116 passes through the seventh connecting hole 11531. The fourth connecting nut 117 is threadedly connected to the fourth connecting stud 116. The fourth connecting nut 117 abuts against the surface of the ear plate 1153 away from the mounting seat 161.

[0048] Referring to Figure 1 , a low-temperature gate valve further includes an operating mechanism 4. The operating mechanism 4 includes a transmission component and a connecting shaft 41. The connecting shaft 41 is rotatably connected to the protective cover 19. The rotation axis of the connecting shaft 41 is perpendicular to the sliding direction of the valve stem 3. One end of the connecting shaft 41 extends out of the protective cover 19. The transmission component is connected between the connecting shaft 41 and the valve stem 3. In this embodiment, the transmission component includes a worm gear and a worm. The worm is coaxially connected to the outer circumference of the connecting shaft 41. The worm gear is rotatably embedded in the protective cover 19. The worm gear meshes with the worm. The rotation axis of the worm gear coincides with the axis of the valve stem 3. The worm gear is threadedly connected to the valve stem 3.

[0049] Referring to Figure 1 and Figure 7, the operating mechanism 4 further includes a handwheel 42. The handwheel 42 includes a sleeve 421, a wheel disc 422, spokes 423 and a crank 424. One end of the sleeve 421 is coaxially provided with a receiving groove 4211. The end of the connecting shaft 41 extending out of the protective cover 19 is coaxially and slidably embedded in the receiving groove 4211, and the outer wall of the connecting shaft 41 is in contact with the side wall of the receiving groove 4211. The wheel disc 422 is located on the outer periphery of the sleeve 421. The outer wall of the wheel disc 422 coincides with the axis of the sleeve 421. The wheel disc 422 is located on the side of the sleeve 421 away from the protective cover 19. One end of the spoke 423 is fixedly connected to the outer wall of the sleeve 421, and the other end of the spoke 423 is fixedly connected to the surface of the wheel disc 422 close to the protective cover 19. A plurality of spokes 423 are provided, and the plurality of spokes 423 are circumferentially and evenly distributed around the axis of the sleeve 421. In this embodiment, four spokes 423 are provided. One end of the crank 424 is fixedly connected to the surface of the wheel disc 422 away from the protective cover 19, and the axis of the crank 424 is parallel to the rotation axis of the connecting shaft 41.

[0050] Refer to Figure 8, the operating mechanism 4 further includes a sliding ring 43, a second connecting magnet 44, a second reset member 45, and an unlocking magnet 46. A sliding groove 4212 is provided on the groove wall of the receiving groove 4211. The sliding ring 43 is embedded in the sliding groove 4212. The inner wall of the sliding ring 43 is flush with the groove wall of the receiving groove 4211. A guiding groove 4213 is provided on the groove wall of the sliding groove 4212. There are two guiding grooves 4213, and the two guiding grooves 4213 are symmetrically distributed along a direction perpendicular to the axis of the receiving groove 4211. A guiding block 432 is fixedly connected to the outer wall of the sliding ring 43. The number of guiding blocks 432, second connecting magnets 44, and second reset members 45 is the same as that of the guiding grooves 4213 and they correspond one by one. The guiding block 432 is slidably embedded in the sliding groove 4212, and the sliding direction of the guiding block 432 is parallel to the axis of the receiving groove 4211. In this embodiment, the guiding block 432 is a dovetail block. A driving block 431 is fixedly connected to the inner wall of the sliding ring 43. A driving groove 411 is provided on the outer circumference of the connecting shaft 41. One end of the driving groove 411 away from the protective cover 19 penetrates through the connecting shaft 41. The number of driving grooves 411 is the same as that of the driving blocks 431 and they correspond one by one. The driving block 431 is slidably embedded in the driving groove 411, and the sliding direction of the driving block 431 is parallel to the axis of the connecting shaft 41. The side wall of the driving block 431 abuts against the groove wall of the driving groove 411. A rotating ring groove 412 is provided on the outer circumference of the connecting shaft 41. The rotating ring groove 412 is located on one side of the driving groove 411 away from the bottom of the receiving groove 4211, and the rotating ring groove 412 communicates with the driving groove 411. The driving block 431 is rotatably embedded in the rotating ring groove 412. First chamfers 413 are provided on both side walls of one end of the driving groove 411 close to the rotating ring groove 412. The first chamfers 413 are used to abut against the driving block 431. A first indicating mark 4214 is provided on the outer wall of the sleeve 421 close to the protective cover 19. Second indicating marks 415 are provided on the outer wall of the connecting shaft 41. There are two second indicating marks 415, and the two second indicating marks 415 are symmetrically distributed along a direction perpendicular to the axis of the connecting shaft 41. The first indicating mark 4214 corresponds to the second indicating marks 415. The second connecting magnet 44 is fixedly connected to one end of the slider away from the protective cover 19. A second installation groove 4215 is provided at one end of the sleeve 421 away from the protective cover 19. The number of second installation grooves 4215 is the same as that of the guiding grooves 4213 and they correspond one by one. The unlocking magnet 46 is embedded in the second installation groove 4215, and the unlocking magnet 46 and the second connecting magnet 44 attract each other. The second reset member 45 is connected between the guiding block 432 and the sleeve 421. The second reset member 45 makes the sliding ring 43 tend to approach the protective cover 19. In this embodiment, the second reset member 45 is a spring. One end of the second reset member 45 is connected to one end of the guiding block 432 close to the protective cover 19, and the other end of the second reset member 45 is connected to the side wall of the guiding groove 4213 close to the protective cover 19.

[0051] Refer to Figure 7 and Figure 9, the operating mechanism 4 further includes a locking component 47. The locking component 47 is connected between the sleeve 421 and the connecting shaft 41 to achieve relative fixation of the handwheel 42 and the connecting shaft 41 in the axial direction of the connecting shaft 41. The locking component 47 includes a hoop 471. One end of the sleeve 421 close to the protective cover 19 is fixedly connected with a rotating column 4216. The axis of the rotating column 4216 is parallel to the axis of the connecting shaft 41. One end of the hoop 471 is rotatably connected to the rotating column 4216. The rotation axis of the hoop 471 is parallel to the axis of the rotating column 4216. There are two hoops 471, and the two hoops 471 are symmetrically distributed along the direction perpendicular to the axis of the connecting shaft 41.

[0052] Referring to Figure 8 and Figure 9 , two fixing ring grooves 414 are provided on the outer periphery of the connecting shaft 41. The two fixing ring grooves 414 are spaced along the axis of the connecting shaft 41. The fixing groove 22 is used for the hoop 471 to be embedded. The groove wall of the fixing groove 22 is in fit with the side wall of the hoop 471. In this embodiment, when the hoop 471 is embedded in the fixing groove 22 on the side close to the protective cover 19 and the unlocking magnet 46 is not embedded in the second installation groove 4215, the transmission block 431 is embedded in the rotating ring groove 412.

[0053] Referring to Figure 10, the locking component 47 further includes an insert block 472, a fixed magnet block 473, a first connecting magnet block 474, and a first reset member 475. One end of the hoop 471 away from the rotating column 4216 is in contact with another hoop 471. A connecting column 4711 is fixedly connected to the end of the hoop 471 away from the rotating column 4216. The length direction of the connecting column 4711 is perpendicular to the axis direction of the connecting shaft 41. A connecting groove 4712 is provided at one end of the hoop 471 close to the connecting column 4711 for the connecting column 4711 of another hoop 471 to be inserted into. The groove walls on both sides of the connecting groove 4712 along the rotation axis of the hoop 471 are in contact with the side wall of the connecting column 4711. The number of the insert block 472, the fixed magnet block 473, the first connecting magnet block 474, and the first reset member 475 is the same as that of the connecting columns 4711 and they correspond one by one. An insertion groove 47111 is provided on the surface of the connecting column 4711 away from the connecting shaft 41. The insert block 472 is slidably inserted into the insertion groove 47111. The sliding direction of the insert block 472 is perpendicular to the length direction of the connecting column 4711. The side wall of the insert block 472 is in contact with the groove wall of the insertion groove 47111. A locking groove 4713 is provided at the groove wall on one side of the connecting groove 4712 away from the connecting shaft 41 for the insert block 472 to be inserted into. The first connecting magnet block 474 is fixedly connected to one end of the insert block 472 close to the bottom of the insertion groove 47111. The first reset member 475 is connected between the first connecting magnet block 474 and the hoop 471. The first reset member 475 makes the end of the insert block 472 away from the first connecting magnet block 474 tend to be inserted into the insertion groove 47111. In this embodiment, the first reset member 475 is a spring. One end of the first reset member 475 is connected to the end of the first connecting magnet block 474 away from the insert block 472, and the other end of the first reset member 475 is connected to the bottom of the insertion groove 47111. A groove 4714 is provided at the groove wall on one side of the connecting groove 4712 close to the connecting shaft 41. The fixed magnet block 473 is inserted into the groove 4714. The fixed magnet block 473 and the first connecting magnet block 474 repel each other to drive the insert block 472 to be inserted into the locking groove 4713. A first installation groove 4715 is provided on the outer periphery of the hoop 471. The first installation grooves 4715 of the two hoops 471 are communicated with each other. The first installation groove 4715 is for the unlocking magnet block 46 to be inserted into. The unlocking magnet block 46 and the first connecting magnet block 474 repel each other to drive the insert block 472 to disengage from the locking groove 4713. An unlocking hole 4716 is provided at the bottom of the first installation groove 4715. The unlocking hole 4716 is communicated with the locking groove 4713.

[0054] The implementation principle of a cryogenic gate valve in an embodiment of the present application is as follows: When it is necessary to operate the gate valve to open or close, the unlocking magnet block 46 is embedded in the first installation groove 4715. The unlocking magnet block 46 repels the first connecting magnet block 474. After the embedded block 472 disengages from the locking groove 4713, it is embedded in the embedding groove 47111. Rotate the hoop 471 so that the two hoops 471 move away from each other, causing the hoop 471 to disengage from the fixed ring groove 414 and the connecting column 4711 to disengage from the connecting groove 4712. Rotate the handwheel 42 so that the first indication mark 4214 is aligned with the second indication mark 415. Slide the sleeve 421, and the transmission block 431 abuts against the first chamfer 413. The transmission block 431 is embedded in the transmission groove 411 to achieve circumferential fixation of the handwheel 42 and the connecting column 4711. The sleeve 421 slides until the hoop 471 is opposite to the fixed ring groove 414 on the side away from the protective cover 19. Rotate the two hoops 471 to move closer to each other, causing the connecting column 4711 to be embedded in the connecting groove 4712. Take out the unlocking magnet block 46 from the first installation groove 4715. The first connecting magnet block 474 and the fixed magnet block 473 repel each other, pushing the embedded block 472 to extend out of the embedding groove 47111 against the elastic force of the first reset member 475 and then be embedded in the locking groove 4713 to achieve relative fixation of the two hoops 471.

[0055] Or when the two hoops 471 are embedded in the fixing groove 22 on the side close to the protective cover 19, rotate the handwheel 42 so that the first indication mark 4214 is aligned with the second indication mark 415. Embed the unlocking magnet block 46 in the second installation groove 4215. The unlocking magnet block 46 attracts the second connecting magnet block 44, driving the sliding ring 43 to slide against the elastic force of the second reset member 45. The transmission block 431 abuts against the first chamfer 413. The transmission block 431 is embedded in the transmission groove 411 to achieve circumferential fixation of the handwheel 42 and the connecting column 4711.

[0056] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A cryogenic gate valve, characterized in that: It includes a valve body (12), a valve plate (2), a valve stem (3), a connecting shaft (41), a transmission component, a handwheel (42) and a locking component (47); the valve stem (3) is coaxially and slidably embedded in the valve body (12); the valve plate (2) is connected to one end of the valve stem (3) to realize the on-off of the valve body (12); the connecting shaft (41) is rotatably connected to the valve body (12); the rotation axis of the connecting shaft (41) is perpendicular to the sliding direction of the valve body (12); the transmission component is connected between the connecting shaft (41) and the valve stem (3); the handwheel (42) is provided with a receiving groove (4211); one end of the connecting shaft (41) is coaxially and slidably embedded in the receiving groove (4211); a transmission block (431) is connected to the groove wall of the receiving groove (4211); a transmission groove (411) is provided on the outer periphery of the connecting shaft (41); the transmission block (431) is slidably embedded in the transmission groove (411); a rotation ring groove (412) is provided on the outer periphery of the connecting shaft (41); the rotation ring groove (412) communicates with the transmission groove (411); the transmission block (431) is rotatably embedded in the rotation ring groove (412); the locking component (47) is connected between the handwheel (42) and the connecting shaft (41) to realize the relative fixation of the handwheel (42) and the connecting shaft (41) along the axis direction of the connecting shaft (41).

2. The cryogenic gate valve according to claim 1, wherein: The locking component (47) includes a hoop (471); one end of the hoop (471) is rotatably connected to the side of the handwheel (42) close to the valve body (12); the rotation axis of the hoop (471) is parallel to the axis of the connecting shaft (41); there are two hoops (471); the two hoops (471) are symmetrically distributed along the direction perpendicular to the axis of the connecting shaft (41); a fixed ring groove (414) is provided on the outer periphery of the connecting shaft (41); the fixed ring groove (414) is used for the hoop (471) to be embedded; there are two fixed ring grooves (414); the two fixed ring grooves (414) are spaced apart along the axis of the connecting shaft (41).

3. The cryogenic gate valve according to claim 2, characterized in that: It further includes an unlocking magnetic block (46); the locking assembly (47) further includes an inserting block (472), a fixed magnetic block (473) and a first connecting magnetic block (474); one end of the hoop (471) away from the rotation axis of the hoop (471) is connected with a connecting column (4711) on the side surface close to the other hoop (471); the hoop (471) is provided with a connecting groove (4712); the connecting groove (4712) is used for the connecting column (4711) of the other hoop (471) to be inserted; the number of the inserting blocks (472), the fixed magnetic blocks (473) and the locking magnetic blocks is the same as that of the hoops (471) and they correspond one by one; the inserting block (472) is slidably connected to the connecting column (4711); the rotation axis of the inserting block (472) is perpendicular to the rotation axis of the hoop (471); a locking groove (4713) is provided at the groove wall on the side of the connecting groove (4712) away from the connecting shaft (41); the locking groove (4713) is used for the inserting block (472) to be inserted; a groove (4714) is provided at the groove wall on the side of the connecting groove (4712) close to the connecting shaft (41); the fixed magnetic block (473) is embedded in the groove (4714); the first connecting magnetic block (474) is connected to the inserting block (472); the fixed magnetic block (473) and the first connecting magnetic block (474) repel each other to drive the inserting block (472) to be inserted into the locking groove (4713); a first installation groove (4715) is provided on the outer periphery of the hoop (471); the first installation grooves (4715) of the two hoops (471) are communicated; the unlocking magnetic block (46) is used for being inserted into the first installation groove (4715); the unlocking magnetic block (46) and the first connecting magnetic block (474) repel each other to drive the inserting block (472) to disengage from the locking groove (4713).

4. The cryogenic gate valve according to claim 3, characterized in that: An unlocking hole (4716) is provided at the bottom of the first installation groove (4715); the unlocking hole (4716) is communicated with the locking groove (4713).

5. The cryogenic gate valve according to claim 3, characterized in that: It further includes a sliding ring (43), a second connecting magnetic block (44) and a second reset member (45); a sliding groove (4212) is provided on the groove wall of the accommodation groove (4211); the sliding ring (43) is slidably embedded in the sliding groove (4212); the sliding direction of the sliding ring (43) is parallel to the axis direction of the connecting shaft (41); the transmission block (431) is connected to the sliding ring (43); the rotating ring groove (412) is located on the side of the transmission groove (411) away from the bottom of the accommodation groove (4211); the second connecting magnetic block (44) is connected to the sliding ring (43); a second installation groove (4215) is provided on the side of the handwheel (42) away from the valve body (12); the second installation groove (4215) is used for embedding the unlocking magnetic block (46); the unlocking magnetic block (46) and the second connecting magnetic block (44) attract each other; the second reset member (45) is connected between the sliding ring (43) and the handwheel (42); the second reset member (45) makes the sliding ring (43) tend to approach the valve body (12); when the clamp (471) is embedded in the fixed ring groove (414) on the side close to the valve body (12) and the unlocking magnetic block (46) is not embedded in the second installation groove (4215), the transmission block (431) is embedded in the rotating ring groove (412).

6. The cryogenic gate valve according to claim 1, wherein: First chamfers (413) are provided on the two side groove walls at one end of the transmission groove (411) close to the rotating ring groove (412); the first chamfers (413) are used for abutting against the transmission block (431).

7. The cryogenic gate valve according to claim 1, wherein: A first indication mark (4214) is provided on the side of the handwheel (42) away from the valve body (12); a second indication mark (415) is provided on the outer periphery of the connecting shaft (41); the first indication mark (4214) corresponds to the second indication mark (415).

8. The cryogenic gate valve according to claim 1, characterized in that: It further includes a valve cover (13), a bracket (16) and a protective cover (19); an accommodation cavity (121) is provided at the upper end of the valve body (12); a connecting cavity (122) is provided at the bottom of the accommodation cavity (121); liquid inlet channels (125) and liquid outlet channels (126) are respectively provided on the two side cavity walls of the connecting cavity (122) along the direction perpendicular to the rotation axis of the valve stem (3); the valve cover (13) is connected to the valve body (12) and covers the opening of the accommodation cavity (121); the bracket (16) is connected to one end of the valve cover (13) away from the valve body (12); the protective cover (19) is connected to one end of the bracket (16) away from the valve cover (13); the transmission component and the connecting shaft (41) are embedded in the protective cover (19); the valve plate (2) is slidably embedded in the accommodation cavity (121); one end of the valve stem (3) is connected to the valve plate (2); the other end of the valve stem (3) sequentially passes through the valve cover (13) and the bracket (16) and then extends into the protective cover (19).

9. The cryogenic gate valve according to claim 8, wherein: It also includes a sealing washer (11), a packing gasket (112), a packing block (113), a packing gland (114) and a packing pressing plate (115); a first sealing groove (128) is provided at the upper end of the valve body (12); a second sealing groove (132) is provided at one end of the valve cover (13) close to the valve body (12); the sealing washer (11) is embedded in the first sealing groove (128) and the second sealing groove (132); a convex ring is connected to one end of the bracket (16) close to the valve cover (13); a third sealing groove (1342) is provided at the end of the valve cover (13) away from the valve body (12); the convex ring is embedded in the third sealing groove (1342); the bracket (16) is provided with a second communication hole (1611); the valve stem (3) is embedded in the second communication hole (1611); a fourth sealing groove (1612) is provided at the hole wall at one end of the second communication hole (1611) away from the valve cover (13); the packing gasket (112), the packing block (113) and the packing gland (114) are sequentially embedded in the fourth sealing groove (1612); the packing pressing plate (115) is connected to the bracket (16); the packing pressing plate (115) abuts against one end of the packing gland (114) away from the valve cover (13).

10. The cryogenic gate valve according to claim 1, wherein: A crank (424) is connected to the side of the handwheel (42) away from the valve body (12).

Images