Mechanical lock control ball valve

Abstract

The utility model provides a mechanical lock control ball valve, and belongs to the technical field of ball valves. The problem of insufficient use reliability is solved. The spring lock comprises a lock body and a lock cylinder rotationally arranged in the lock body, the lower end of the lock body is fixedly sleeved with the upper end of the valve rod, the lock body is sleeved with a connecting sleeve, the valve body is provided with an abutting portion, the connecting sleeve abuts against the abutting portion and is fixed to the valve body in the circumferential direction, and the upper end of the lock body is higher than the connecting sleeve. The upper end of the lock body is fixedly sleeved with an operating piece, a locking spring and a locking pin are transversely arranged at the position, lower than the lock cylinder, in the lock body, a through hole is formed in the side portion of the connecting sleeve, a clamping groove is formed in the inner wall of the operating piece, and the outer end of the locking pin penetrates through the through hole and is inserted into the clamping groove. A guide structure is arranged between the lower end of the lock cylinder and the locking pin, and the guide structure enables the lock cylinder to push the locking pin to slide in the direction of overcoming the locking spring when the lock cylinder rotates. The device has the advantages of improving the use reliability and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve relates to a mechanical lock control ball valve. BACKGROUND

[0002] The traditional ball valve only has the function of opening and closing, and does not have the function of locking, so that the user can open the ball valve by himself and continue to use it in the case of arrears. In order to solve this problem, the Chinese patent discloses a new type of ball valve with lock with patent application No. 03228287.7, which comprises a valve body, a valve core, a valve rod and a lock body, the valve core is located in the valve body, the valve rod passes through the valve body and is connected with the valve core, the lock body is provided with a lock core (the lock body and the lock core constitute a traditional pin tumbler lock structure), and a key matched with the lock core, the valve body and the lock body are integrated, and the lock core is connected with the valve rod. In the locking state, the lock core and the lock body are fixed together by the pin, so that the lock core cannot be rotated. When the ball valve needs to be opened, the key is inserted into the key hole of the lock core, the key will push the pin open and make the lock core and the lock body no longer fixed, then the key is rotated to drive the lock core to rotate, because the lock core is connected with the valve rod, so the valve rod will rotate with it.

[0003] However, the above-mentioned new type of ball valve with lock also has the following problems: the valve seat made of plastic is arranged between the two sides of the ball core and the valve body, and the friction between the two valve seats needs to be overcome during the rotation of the ball core, that is, the torque for opening the valve is relatively large, and the torque is directly borne by the key, and the key is relatively thin because it needs to be inserted into the key hole of the lock core, so that the key is easily broken in the lock core after a long time of use, and the use reliability is insufficient. UTILITY MODEL CONTENTS

[0004] The utility model aims at the above-mentioned problems existing in the prior art, and provides a mechanical lock control ball valve, which solves the problem of insufficient use reliability.

[0005] The utility model can be realized by the following technical schemes:

[0006] The utility model discloses a mechanical lock control ball valve, including the valve body, the pin tumbler lock and the valve stem in the valve body and the upper end stretch, the pin tumbler lock includes the lock body and the lock cylinder rotation setting in the lock body, its characterized in that, the lower end of lock body is sleeved and is fixed in the upper end part of valve stem, and the lock body is equipped with the connecting sleeve of sleeve setting, and the valve body is equipped with the abutting portion, and the connecting sleeve is abutted on the abutting portion and is fixed with the valve body peripherally, and the upper end of lock body is higher than the connecting sleeve, and the upper end of lock body is equipped with the operating part of sleeve connection and fixed, and the lock cylinder is in the position below the lock cylinder and is equipped with the locking spring and the locking pin along the lateral direction in the lock body, and the side of connecting sleeve is equipped with the through -hole, and the inner wall of operating part is equipped with the clamping groove, and the outer end of locking pin passes through the through -hole and inserts into the clamping groove, and the both ends of locking spring are respectively abutted on the inner end of locking pin and the inner wall of lock body, and the lower end of lock cylinder and locking pin are equipped with the guide structure that can make the lock cylinder push locking pin to slide to the direction of overcoming locking spring when rotating.

[0007] The utility model discloses a mechanical lock control ball valve, including the valve body, the pin tumbler lock and the valve stem in the valve body and the upper end stretch, the pin tumbler lock includes the lock body and the lock cylinder rotation setting in the lock body, its characterized in that, the lower end of lock body is sleeved and is fixed in the upper end part of valve stem, and the lock body is equipped with the connecting sleeve of sleeve setting, and the valve body is equipped with the abutting portion, and the connecting sleeve is abutted on the abutting portion and is fixed with the valve body peripherally, and the upper end of lock body is higher than the connecting sleeve, and the upper end of lock body is equipped with the operating part of sleeve connection and fixed, and the lock cylinder is in the position below the lock cylinder and is equipped with the locking spring and the locking pin along the lateral direction in the lock body, and the side of connecting sleeve is equipped with the through -hole, and the inner wall of operating part is equipped with the clamping groove, and the outer end of locking pin passes through the through -hole and inserts into the clamping groove, and the both ends of locking spring are respectively abutted on the inner end of locking pin and the inner wall of lock body, and the lower end of lock cylinder and locking pin are equipped with the guide structure that can make the lock cylinder push locking pin to slide to the direction of overcoming locking spring when rotating.

[0008] The utility model discloses a mechanical lock control ball valve, including the valve body, the pin tumbler lock and the valve stem in the valve body and the upper end stretch, the pin tumbler lock includes the lock body and the lock cylinder rotation setting in the lock body, its characterized in that, the lower end of lock body is sleeved and is fixed in the upper end part of valve stem, and the lock body is equipped with the connecting sleeve of sleeve setting, and the valve body is equipped with the abutting portion, and the connecting sleeve is abutted on the abutting portion and is fixed with the valve body peripherally, and the upper end of lock body is higher than the connecting sleeve, and the upper end of lock body is equipped with the operating part of sleeve connection and fixed, and the lock cylinder is in the position below the lock cylinder and is equipped with the locking spring and the locking pin along the lateral direction in the lock body, and the side of connecting sleeve is equipped with the through -hole, and the inner wall of operating part is equipped with the clamping groove, and the outer end of locking pin passes through the through -hole and inserts into the clamping groove, and the both ends of locking spring are respectively abutted on the inner end of locking pin and the inner wall of lock body, and the lower end of lock cylinder and locking pin are equipped with the guide structure that can make the lock cylinder push locking pin to slide to the direction of overcoming locking spring when rotating.

[0009] The utility model discloses a mechanical lock control ball valve, including the valve body, the pin tumbler lock and the valve stem in the valve body and the upper end stretch, the pin tumbler lock includes the lock body and the lock cylinder rotation setting in the lock body, its characterized in that, the lower end of lock body is sleeved and is fixed in the upper end part of valve stem, and the lock body is equipped with the connecting sleeve of sleeve setting, and the valve body is equipped with the abutting portion, and the connecting sleeve is abutted on the abutting portion and is fixed with the valve body peripherally, and the upper end of lock body is higher than the connecting sleeve, and the upper end of lock body is equipped with the operating part of sleeve connection and fixed, and the lock cylinder is in the position below the lock cylinder and is equipped with the locking spring and the locking pin along the lateral direction in the lock body, and the side of connecting sleeve is equipped with the through -hole, and the inner wall of operating part is equipped with the clamping groove, and the outer end of locking pin passes through the through -hole and inserts into the clamping groove, and the both ends of locking spring are respectively abutted on the inner end of locking pin and the inner wall of lock body, and the lower end of lock cylinder and locking pin are equipped with the guide structure that can make the lock cylinder push locking pin to slide to the direction of overcoming locking spring when rotating.

[0010] The action part is located in the guide groove, and the inner side groove wall of the guide groove abuts against the action part when the mechanical lock-controlled ball valve is in the closed state (the inner side of the inner side groove wall refers to the inner end of the locking pin). When the lock cylinder is rotated, the action part rotates with the lock cylinder. Since the locking pin is supported by the locking spring, the locking spring can be compressed to provide space for the locking pin to slide inward, so that the action part extrudes the inner side groove wall of the guide groove and pushes the locking pin to compress the locking spring to form sliding.

[0011] In the mechanical lock-controlled ball valve, the action part is a rectangular block with the length direction transversely arranged, and the inner side groove wall of the guide groove abuts against one of the rectangular sides of the action part when the pin tumbler lock is in the locked state. The length of the action part is less than the groove width of the guide groove in the axial direction of the locking pin.

[0012] When the pin tumbler lock is in the locked state, the inner side groove wall of the guide groove abuts against one of the rectangular sides of the action part (at this time, the length direction of the action part is perpendicular to the axial direction of the locking pin). Since the length of the action part is less than the groove width of the guide groove in the axial direction of the locking pin, the action part will switch from the state that the length direction is perpendicular to the axial direction of the locking pin to the state that the length direction is consistent with the axial direction of the locking pin with the rotation of the lock cylinder. In the process, the action part will push the locking pin to slide against the action of the locking spring until the locking pin is completely retracted into the lock body.

[0013] In the mechanical lock-controlled ball valve, as another technical solution, the action part is a circular block, the center line of the action part is eccentrically arranged relative to the center line of the lock cylinder, the diameter of the action part is less than the width of the guide pin in the axial direction of the locking pin, and the inner side groove wall of the guide groove abuts against the outer peripheral surface of the action part when the pin tumbler lock is in the locked state.

[0014] Since the action part is eccentrically arranged as a circular block and the diameter of the action part is less than the width of the guide pin in the axial direction of the locking pin, the eccentric arrangement makes it clear that the distance from the outer peripheral surface of the action part to the center line of the lock cylinder will change. Therefore, with the rotation of the lock cylinder, the action part will gradually push the locking pin to slide against the action of the locking spring until the locking pin is completely retracted into the lock body.

[0015] In the mechanical lock-controlled ball valve, the bottom of the operating member is provided with a recess, the top of the operating member is provided with a non-circular sleeve hole, the upper end of the lock body is shaped to match the sleeve hole, the sleeve hole is in communication with the recess, the top wall of the recess abuts against the upper end of the connecting sleeve, the clamping groove is arranged on the inner wall of the recess, and the operating member is fixed with the lock body through the pin penetrating the operating member from the side and penetrating into the upper end of the lock body.

[0016] In the assembly, the operating member is sleeved on the upper end of the lock body through the sleeve hole, and the operating member and the lock body are circumferentially fixed by matching the non-circular sleeve hole with the shape of the upper end of the lock body. Then, the operating member and the lock body are fixed together by using the pin, so as to ensure that the operating member cannot be removed from the lock body. After the sleeve is completed, the top wall of the recess of the operating member is abutted against the upper end of the connecting sleeve, and the lower end of the connecting sleeve is abutted against the abutment portion of the valve body, so that the connecting sleeve is also fixed in the axial direction of the valve stem.

[0017] In the mechanical lock control ball valve, the side portion of the connecting sleeve is provided with a protrusion, and the inner wall of the recess is further provided with an arc-shaped limiting groove. The arc of the arc-shaped limiting groove is 90°, and the protrusion is located in the arc-shaped limiting groove.

[0018] The movement of the protrusion in the arc-shaped limiting groove can limit the rotation angle of the operating member, which is equivalent to limiting the rotation angle of the valve stem.

[0019] In the mechanical lock control ball valve, the abutment portion is block-shaped and protrudes from the side portion of the upper end of the valve body. The bottom of the connecting sleeve is provided with a matching notch, and the abutment portion is located in the matching notch.

[0020] Through the cooperation of the matching notch and the abutment portion, the connecting sleeve can be circumferentially fixed with the valve body, and the connecting sleeve can be positioned in the axial direction of the valve stem by means of the connecting portion and the operating member.

[0021] In the mechanical lock control ball valve, the upper end of the valve stem has a coupling block with a non-circular cross section. The bottom of the lock body is provided with a coupling hole with the same shape as the coupling block. The coupling block is located in the coupling hole, and the lock body is fixed with the valve stem by means of the pin two which passes through the lock body from the side portion and is inserted into the coupling block.

[0022] Compared with the prior art, the mechanical lock control ball valve sets the lock body to be sleeved and fixed on the upper end of the valve stem instead of connecting the lock cylinder with the valve stem. The connecting sleeve is sleeved and fixed on the lock body and circumferentially fixed with the valve body, and the operating member is sleeved and fixed on the upper end of the lock body. The operating member and the connecting sleeve are locked together by the locking pin arranged in the lock body, and the unlocking of the locking pin is controlled by the rotation of the lock cylinder. Such structure makes the key only used to control the sliding of the locking pin, and the operating member drives the rotation of the lock body and the valve stem. In other words, the operating member is used to replace the torsion of the key when driving the valve stem to rotate, which eliminates the phenomenon of key breaking in the lock cylinder and improves the use reliability. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a perspective view of the mechanical lock control ball valve.

[0024] Figure 2 is a sectional view of the mechanical lock control ball valve in the state that the locking pin locks the operating member.

[0025] Figure 3 is Figure 2 a sectional view along A-A direction in figure 1.

[0026] Figure 4 is a schematic view of the cooperation between the lock cylinder and the locking pin in example one.

[0027] Figure 5 is a sectional view (the sectional angle is the same as that in figure 1) of the mechanical lock control ball valve in the state that the operating member is unlocked. Figure 2

[0028] In the figure, 1, valve body; 1a, abutting part; 2, pin tumbler lock; 2a, lock body; 2b, lock cylinder; 2b1, key hole; 2b2, acting part; 2b3, cooperating groove; 3, valve stem; 3a, connecting block; 4, ball core; 5, connecting sleeve; 5a, through hole; 5b, protruding block; 5c, cooperating notch; 6, operating member; 6a, clamping groove; 6b, arc-shaped limiting groove; 6c, ear part; 7, locking pin; 7a, guide groove; 8, locking spring; 9, cover; 10, pin two; 11, limiting pin. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0030] Example one

[0031] As Figure 1 , Figure 2 and Figure 3 ​As shown in the figure, a mechanical lock control ball valve includes a valve body 1, a pin tumbler lock 2, and a valve stem 3 located in the valve body 1 and extending out of the valve body 1 at the upper end, and a ball core 4 is also provided in the valve body 1, and the lower end of the valve stem 3 is connected with the ball core 4. The pin tumbler lock 2 includes a lock body 2a and a lock cylinder 2b rotatably arranged in the lock body 2a, and the top of the lock cylinder 2b is provided with a key hole 2b1, and the lower end of the lock body 2a is sleeved and fixed on the upper end of the valve stem 3, wherein the upper end of the valve stem 3 has a coupling block 3a with a non-circular cross section, the bottom of the lock body 2a is provided with a coupling hole with the same shape as the coupling block 3a, the coupling block 3a is located in the coupling hole, and the lock body 2a and the valve stem 3 are fixed by a pin 10 which passes through the lock body 2a from the side and is inserted into the coupling block 3a. The lock body 2a is provided with a connecting sleeve 5, the valve body 1 is provided with an abutting portion 1a, the connecting sleeve 5 abuts on the abutting portion 1a, and the connecting sleeve 5 and the valve body 1 are circumferentially fixed, wherein the abutting portion 1a is block-shaped and protrudes on the side of the upper end of the valve body 1, and the bottom of the connecting sleeve 5 is provided with a matching notch 5c, and the abutting portion 1a is located in the matching notch 5c. The upper end of the lock body 2a is higher than the connecting sleeve 5, and the upper end of the lock body 2a is sleeved and fixed with an operating member 6, and a locking spring 8 and a locking pin 7 are provided in the lock body 2a below the lock cylinder 2b along the transverse direction, the side of the connecting sleeve 5 is provided with a through hole 5a, the inner wall of the operating member 6 is provided with a clamping groove 6a, the outer end of the locking pin 7 passes through the through hole 5a and is inserted into the clamping groove 6a, and the two ends of the locking spring 8 abut on the inner end of the locking pin 7 and the inner wall of the lock body 2a respectively, and the lower end of the lock cylinder 2b and the locking pin 7 are provided with a guide structure which can drive the locking pin 7 to slide in the direction of overcoming the locking spring 8 when the lock cylinder 2b rotates.

[0032] Specifically, as shown in Figure 2 、 Figure 3 and Figure 4 , the guide structure includes a guide groove 7a provided on the locking pin 7 and an acting portion 2b2 protruding from the lower end of the lock cylinder 2b, and the acting portion 2b2 is located in the guide groove 7a, and the acting portion 2b2 will press the inner groove wall of the guide groove 7a and push the locking pin 7 to slide when the lock cylinder 2b rotates. The acting portion 2b2 is rectangular block-shaped with the length direction along the transverse direction, and the inner groove wall of the guide groove 7a abuts on one of the rectangular side surfaces of the acting portion 2b2 when the pin tumbler lock 2 is in the locked state, and the length of the acting portion 2b2 is less than the width of the guide groove 7a along the axial direction of the locking pin 7. The side of the lock cylinder 2b is also provided with an arc-shaped matching groove 2b3 with an arc of 90 degrees, and a limiting pin 11 is fixed in the lock body 2a and located in the matching groove 2b3, so as to not affect the rotation of the lock cylinder 2b and at the same time axially fix the lock cylinder 2b in the lock body 2a.

[0033] Further, as shown in Figure 1 、 Figure 2 and Figure 3The bottom of the operating member 6 is provided with a concave cavity, and the top of the operating member 6 is provided with a non-circular sleeve hole. The upper end of the lock body 2a is shaped to match the sleeve hole, and the sleeve hole is in communication with the concave cavity. The top wall of the concave cavity abuts against the upper end of the connecting sleeve 5. The clamping groove 6a is arranged on the inner wall of the concave cavity. The operating member 6 is fixedly connected with the lock body 2a by penetrating the operating member 6 from the side and transmitting the pin into the upper end of the lock body 2a. The side of the connecting sleeve 5 is further provided with a protrusion 5b, and the inner wall of the concave cavity is further provided with an arc-shaped limiting groove 6b. The arc of the arc-shaped limiting groove 6b is 90°. The protrusion 5b is located in the arc-shaped limiting groove 6b. The movement of the protrusion 5b in the arc-shaped limiting groove 6b can limit the rotation angle of the operating member 6. This is equivalent to limiting the rotation angle of the valve stem 3. In this embodiment, the upper end of the lock cylinder 2b protrudes out of the operating member 6. The upper end of the lock cylinder 2b is hingedly connected with a cover 9. Rotating the cover 9 can block the key hole 2b1. The side of the operating member 6 protrudes two ears 6c which are symmetrically arranged. One of the two ears 6c is integrally connected with a sheet-shaped part between the side wall of the operating member 6. The sheet-shaped part is provided with a lead seal hole 1. The lower end of the abutting part 1a protrudes out of the connecting sleeve 5. The side of the abutting part 1a is provided with a lead seal hole 2.

[0034] In assembly, the lock body 2a of the pin tumbler lock 2 is first sleeved on the connecting block 3a at the upper end of the valve stem 3 through the connecting hole at the bottom, and then the lock body 2a is fixedly connected with the connecting block 3a by the pin 10. Then the connecting sleeve 5 is sleeved outside the lock body 2a until the matching notch 5c at the bottom of the connecting sleeve 5 abuts against the abutting part 1a of the valve body 1 (of course, the position of the outer end of the locking pin 7 should correspond to the position of the through hole 5a at the side of the connecting sleeve 5 when sleeving). Finally, the operating member 6 is sleeved outside the upper end of the lock body 2a through the sleeve hole and is fixedly connected with the upper end of the lock body 2a by the pin 1 (when sleeving the operating member 6, the position of the inner clamping groove 6a should correspond to the position of the outer end of the locking pin 7).

[0035] When the mechanical lock control ball valve is in the closed state, the lock cylinder 2b is in a position in which the length direction of the push block is perpendicular to the axial direction of the locking pin 7. The elastic force of the locking spring 8 acts on the locking pin 7, so that the outer end of the locking pin 7 penetrates through the through hole 5a of the connecting sleeve 5 and is inserted into the clamping groove 6a of the operating member 6. Thus, the operating member 6 is fixedly connected with the connecting sleeve 5 in the circumferential direction. The connecting sleeve 5 is fixedly connected with the valve body 1 in the circumferential direction. Therefore, the operating member 6 cannot be rotated at this time. This state is shown in Figure 2 and Figure 3 .

[0036] When the mechanical lock control ball valve needs to be opened, the key is inserted into the key hole 2b1 of the lock core 2b and turned (as with the existing pin tumbler lock 2, the key will push the pin between the lock body 2a and the lock core 2b to make the lock core 2b and the lock body 2a release the circumferential fixation), the key will rotate the lock core 2b relative to the lock body 2a, because the length of the action part 2b2 is less than the width of the guide groove 7a along the axial direction of the locking pin 7, the action part 2b2 will switch from the state of being perpendicular to the axial direction of the locking pin 7 to being consistent with the axial direction of the locking pin 7 as the lock core 2b rotates, and in the process, the action part 2b2 will push the locking pin 7 to slide against the action of the locking spring 8, thereby making the locking pin 7 entirely retract into the lock body 2a. Because the locking pin 7 is entirely retracted into the lock body 2a, the operating part 6 is no longer circumferentially fixed with the connecting sleeve 5, and the state is as shown in Figure 5 Then only the operating part 6 is turned, the operating part 6 will rotate the lock body 2a, and the valve stem 3 fixedly connected with the lock body 2a will also rotate and rotate the ball core 4.

[0037] In the mechanical lock control ball valve, by setting the lock body 2a to be sleeved and fixed on the upper end of the valve stem 3 instead of connecting the lock core 2b with the valve stem 3, and by sleeving and fixing the connecting sleeve 5 circumferentially fixed with the valve body 1 on the outer sleeve of the lock body 2a and sleeving and fixing the operating part 6 on the upper end of the lock body 2a, the operating part 6 is locked together with the connecting sleeve 5 by the locking pin 7 arranged in the lock body 2a, and the unlocking of the locking pin 7 is controlled by the lock core 2b, such a structure makes the key only used to control the sliding of the locking pin 7, and the operating part 6 is used to rotate the lock body 2a and drive the valve stem 3 to rotate, which is equivalent to using the operating part 6 to replace the torque of the key when the key carries the valve stem 3 to rotate, thereby eliminating the phenomenon of the key breaking in the lock core 2b and improving the reliability of the structure.

[0038] Example Two

[0039] The structure and principle of this embodiment are basically the same as those of example one, the difference is that in this embodiment, the action part 2b2 is a circular block, the center line of the action part 2b2 is eccentrically arranged relative to the center line of the lock core 2b, and the diameter of the action part 2b2 is less than the width of the guide pin along the axial direction of the locking pin 7, and the outer peripheral surface of the action part 2b2 abuts against the groove wall near the locking spring 8 on the side of the guide groove 7a in the locked state of the pin tumbler lock 2. Because the action part 2b2 is eccentrically arranged in a circular block shape and the diameter of the action part 2b2 is less than the width of the guide pin along the axial direction of the locking pin 7, the eccentric arrangement makes it clear that the distance from the outer peripheral surface of the action part 2b2 to the center line of the lock core 2b will change, so as the lock core 2b rotates, the action part 2b2 will gradually push the locking pin 7 to slide against the action of the locking spring 8 until the locking pin 7 is entirely retracted into the lock body 2a.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A mechanical lock-operated ball valve comprising a valve body (1), a tumbler lock (2) and a valve stem (3) extending out of the valve body (1) at its upper end, said tumbler lock (2) comprising a lock body (2a) and a lock cylinder (2b) rotatably arranged in the lock body (2a), characterized in that, The lower end of the lock body (2a) is sleeved and fixed on the upper end of the valve stem (3), the lock body (2a) is externally sleeved with a connecting sleeve (5), the valve body (1) is provided with an abutting portion (1a), the connecting sleeve (5) abuts on the abutting portion (1a) and the connecting sleeve (5) is circumferentially fixed with the valve body (1), the upper end of the lock body (2a) is higher than the connecting sleeve (5), the upper end of the lock body (2a) is externally sleeved and fixed with an operating member (6), the lock body (2a) is internally provided with a locking spring (8) and a locking pin (7) in a transverse direction at a position lower than the lock cylinder (2b), the side portion of the connecting sleeve (5) is provided with a through hole (5a), the inner wall of the operating member (6) is provided with a clamping groove (6a), the outer end of the locking pin (7) passes through the through hole (5a) and is inserted into the clamping groove (6a), the two ends of the locking spring (8) abut on the inner end of the locking pin (7) and the inner wall of the lock body (2a) respectively, the lower end of the lock cylinder (2b) and the locking pin (7) are provided with a guide structure capable of pushing the locking pin (7) to slide in a direction of overcoming the locking spring (8) when the lock cylinder (2b) rotates.

2. A mechanical lock-up ball valve according to claim 1, wherein The guide structure comprises a guide groove (7a) arranged on the locking pin (7) and an acting portion (2b2) integrally protruding from the lower end of the lock cylinder (2b), the acting portion (2b2) is located in the guide groove (7a), and the acting portion (2b2) will extrude the inner side groove wall of the guide groove (7a) and push the locking pin (7) to slide when the lock cylinder (2b) rotates.

3. A mechanically locked ball valve according to claim 2, characterized in that The acting portion (2b2) is in the shape of a rectangular block arranged in a length direction along a transverse direction, the inner side groove wall of the guide groove (7a) abuts against one of the rectangular side faces of the acting portion (2b2) when the pin tumbler lock (2) is in a locked state, and the length of the acting portion (2b2) is less than the groove width of the guide groove (7a) along the axial direction of the locking pin (7).

4. The mechanical lock-up ball valve according to claim 2, wherein The acting portion (2b2) is in the shape of a circular block, the center line of the acting portion (2b2) is arranged eccentrically relative to the center line of the lock cylinder (2b), the diameter of the acting portion (2b2) is less than the width of the guide pin along the axial direction of the locking pin (7), and the inner side groove wall of the guide groove (7a) abuts against the outer peripheral surface of the acting portion (2b2) when the pin tumbler lock (2) is in the locked state.

5. A mechanically locked ball valve according to claim 1 or 2, characterized in that The bottom of the operating member (6) is provided with a concave cavity, the top of the operating member (6) is provided with a non-circular sleeving hole, the shape of the upper end of the lock body (2a) is matched with the sleeving hole, the sleeving hole is communicated with the concave cavity, the top wall of the concave cavity abuts against the upper end of the connecting sleeve (5), the clamping groove (6a) is arranged on the inner wall of the concave cavity, and the operating member (6) and the lock body (2a) are fixed by a pin inserted into the lock body (2a) from the side portion and passing through the operating member (6).

6. A mechanically locked ball valve according to claim 5, characterized in that The side portion of the connecting sleeve (5) is provided with a protrusion (5b), the inner wall of the concave cavity is further provided with an arc-shaped limiting groove (6b), the arc of the arc-shaped limiting groove (6b) is 90°, and the protrusion (5b) is located in the arc-shaped limiting groove (6b).

7. A mechanically locked ball valve according to claim 6, characterized in that The abutting portion (1a) is in the shape of a block and is arranged on the side portion of the upper end of the valve body (1) in a protruding manner, the bottom of the connecting sleeve (5) is provided with a matching notch (5c), and the abutting portion (1a) is located in the matching notch (5c).

8. The mechanical lock-up ball valve according to claim 5, wherein, The upper end of the valve stem (3) has a coupling block (3a) with a non-circular cross section, the bottom of the lock body (2a) is provided with a coupling hole with the same shape as the coupling block (3a), the coupling block (3a) is located in the coupling hole, and the lock body (2a) and the valve stem (3) are fixed through the pin (10) which penetrates the lock body (2a) from the side and is inserted into the coupling block (3a).

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