Bidirectional lock

Abstract

The utility model relates to a bidirectional lock. The technical problem to be solved by the utility model is to provide a bidirectional lock. According to the technical scheme, the two-way valve comprises a two-way lock valve body assembly, a pilot valve element assembly and a one-way valve assembly, the pilot valve element assembly comprises a middle sleeve, a liquid inlet sleeve, an ejector rod and a large spring, and the two-way lock valve body assembly comprises a two-way lock valve body, an anti-moving screw and a first sealing gasket. A valve body built-in hole is transversely formed in the two-way lock valve body, a valve body inner groove is formed in the middle of the outer wall of the two-way lock valve body, valve body liquid flowing holes are formed in the positions, at the two ends of the valve body inner groove, of the outer wall of the two-way lock valve body, and the middle sleeve is arranged in the middle of the valve body built-in hole. The two-way lock has the advantages that the middle sleeve and the two-way lock valve body are in threaded connection and then limited through the anti-moving screw, double limiting is achieved, the problem of displacement of the middle sleeve caused by frequent action of the ejector rod is effectively solved, and stability and reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of two-way locks. BACKGROUND

[0002] Hydraulic two-way lock is mainly used for locking the position of hydraulic cylinder, to prevent accidental movement of hydraulic cylinder due to external force. It is usually composed of two-way lock valve body, pilot valve core assembly and check valve assembly. Its working principle is to control the opening or closing of check valve assembly by the movement of pilot valve core assembly, so as to realize the locking or release of hydraulic cylinder. In traditional hydraulic two-way lock, the position of pilot valve core assembly is mainly limited by check valve assembly at both ends. However, in actual use, the top rod inside the pilot valve core assembly frequently moves back and forth, causing the middle sleeve of the pilot valve core assembly to be frequently impacted and displaced. The displacement of the middle sleeve changes the action distance of the top rod at both ends, affecting the control accuracy of the check valve assembly. The displacement problem not only reduces the reliability of the hydraulic two-way lock, but also may cause the position locking of the hydraulic cylinder to fail. This is improved and optimized. SUMMARY

[0003] To solve the above problems, the technical problem to be solved by the utility model is to provide a two-way lock.

[0004] The utility model discloses two-way lock adopts the technical scheme: including two-way lock valve body assembly, pilot valve core assembly and check valve assembly, its characterized in that pilot valve core assembly includes middle sleeve, the liquid inlet sleeve being arranged at both ends of the middle sleeve, the top rod that moves in the middle sleeve and the liquid inlet sleeve and both ends drives check valve assembly to act, the big spring that is set in both ends of the top rod, two-way lock valve body assembly includes two-way lock valve body, anti-displacement screw and first sealing gasket, the built-in hole of valve body is horizontally arranged in the two-way lock valve body, the valve body inner groove is arranged in the middle of the outer wall of the two-way lock valve body, the valve body liquid hole that is longitudinally arranged and is communicated with the built-in hole of valve body is arranged at both ends of the valve body inner groove of the outer wall of the two-way lock valve body, the middle sleeve is placed in the middle of the built-in hole of valve body, the inner through hole of middle sleeve is arranged in the middle sleeve, the outer thread of middle sleeve is arranged in the middle of the outer wall of the middle sleeve, the anti-displacement groove of middle sleeve is arranged in the middle of the outer thread of middle sleeve, the first sealing groove of middle sleeve is arranged in the outer wall of the middle sleeve at both ends of the outer thread of middle sleeve.

[0005] The inner wall of the middle part of the built-in hole of valve body is provided with the inner thread of valve body that is threadedly connected with the outer thread of middle sleeve, the first sealing groove of valve body is arranged in the inner wall of the built-in hole of valve body at both ends of the inner thread of valve body, the threaded hole of valve body that is communicated with the built-in hole of valve body is arranged in the bottom of the valve body inner groove, after the anti-displacement screw is threadedly connected with the threaded hole of valve body, the end part is placed in the anti-displacement groove of middle sleeve, the first sealing gasket is arranged between the first sealing groove of middle sleeve and the first sealing groove of valve body.

[0006] The width of the outer thread of the intermediate sleeve is greater than the width of the inner thread of the valve body.

[0007] The intermediate sleeve second sealing groove is provided on the outer wall of the intermediate sleeve at both ends of the intermediate sleeve first sealing groove, the valve body second sealing groove is provided on the inner wall of the valve body built-in hole at both ends of the valve body first sealing groove, and a second sealing gasket is arranged between the intermediate sleeve second sealing groove and the valve body second sealing groove.

[0008] The depth of the intermediate sleeve second sealing groove is greater than the depth of the intermediate sleeve first sealing groove, and the depth of the valve body first sealing groove is greater than the depth of the valve body second sealing groove.

[0009] The intermediate sleeve communication hole is arranged on the inner wall of the intermediate sleeve through hole and communicates with the intermediate sleeve second sealing groove.

[0010] The number of the valve body threaded holes and the anti-shifting screws is 2.

[0011] The two-way lock has the advantages that: the intermediate sleeve is threadedly connected with the two-way lock valve body and then is limited by the anti-shifting screws, so that double limiting is realized, the displacement problem of the intermediate sleeve caused by the frequent action of the ejector rod is effectively prevented, the stability and reliability are significantly improved, the multiple sealing design is introduced, the liquid is prevented from leaking from the gap between the intermediate sleeve and the two-way lock valve body, and the overall sealing performance of the two-way lock is significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further explained in detail in combination with the drawings and specific embodiment.

[0013] Figure 1 is the half sectional view of the two-way lock of the utility model;

[0014] Figure 2 is the half sectional view of the pilot valve core assembly of the utility model;

[0015] Figure 3 is the half sectional view of the two-way lock valve body assembly of the utility model;

[0016] Figure 4 is the half sectional view of the two-way lock valve body of the utility model;

[0017] Figure 5 is the half sectional view of the intermediate sleeve of the utility model. DETAILED DESCRIPTION

[0018] As Figures 1-5The utility model relates to a bidirectional lock, including bidirectional lock valve body subassembly 1, pilot valve core subassembly 2 and check valve subassembly 3, pilot valve core subassembly 2 includes intermediate sleeve 5, the liquid inlet sleeve 6 of being arranged at the both ends of intermediate sleeve 5, the top rod 7 of moving in intermediate sleeve 5 and liquid inlet sleeve 6 and both ends drive check valve subassembly 3 action, the big spring 8 of being set in the both ends of top rod 7, bidirectional lock valve body subassembly 1 includes bidirectional lock valve body 11, anti -migration screw 12 and first sealing pad 13, the valve built -in hole 15 of being provided with transversely in bidirectional lock valve body 11, the valve body inner groove 17 of being equipped with in the middle part of bidirectional lock valve body 11 outer wall, the valve body liquid hole 16 of being equipped with longitudinally in the both ends of valve body inner groove 17 of bidirectional lock valve body 11 outer wall and with valve built -in hole 15 is communicated, the intermediate sleeve 5 is placed in the middle of valve built -in hole 15, the intermediate sleeve inner through -hole 18 of being equipped with in intermediate sleeve 5, the intermediate sleeve outer thread 19 of being equipped with in the middle part of intermediate sleeve 5 middle part outer wall, the intermediate sleeve anti -migration groove 20 of being equipped with in the middle part of intermediate sleeve outer thread 19, the intermediate sleeve first sealing groove 21 of being equipped with in the both ends of intermediate sleeve outer thread 19 of intermediate sleeve 5 outer wall, the valve body inner thread 23 of being equipped with in the middle part of valve built -in hole 15 inner wall and with intermediate sleeve outer thread 19 screw connection, the valve body first sealing groove 24 of being equipped with in the both ends of valve body inner thread 23 of valve built -in hole 15 inner wall, the valve body screw hole 25 of being equipped with in the bottom of valve body inner groove 17 and with valve built -in hole 15 is communicated, after anti -migration screw 12 and valve body screw hole 25 are screwed, its end part is placed in the intermediate sleeve anti -migration groove 20, the first sealing pad 13 of being equipped with between intermediate sleeve first sealing groove 21 and valve body first sealing groove 24, after intermediate sleeve 5 and bidirectional lock valve body 11 are screwed, then through anti -migration screw 12 and carry out the location, realize double location, effectively prevent the displacement problem of intermediate sleeve 5 due to the frequent action of top rod 7, the stability and reliability significantly improve, effectively prevent the leakage of liquid from the gap between intermediate sleeve and bidirectional lock valve body through first sealing pad 13, improve the overall sealing performance of bidirectional lock.

[0019] The width of the intermediate sleeve outer thread 19 is greater than the width of the valve body inner thread 23, facilitating the installation of the intermediate sleeve 5, reducing the internal wear of the bidirectional lock valve body, and improving the service life.

[0020] The intermediate sleeve second sealing groove 27 is arranged on the outer wall of the intermediate sleeve 5 at the two ends of the intermediate sleeve first sealing groove 21, the valve body second sealing groove 28 is arranged on the inner wall of the valve built-in hole 15 at the two ends of the valve body first sealing groove 24, the second sealing pad 9 is arranged between the intermediate sleeve second sealing groove 27 and the valve body second sealing groove 28, and double sealing and multiple positioning are realized, further improving the sealing guarantee.

[0021] The depth of the second sealing groove 27 of the intermediate sleeve is greater than the depth of the first sealing groove 21 of the intermediate sleeve, the depth of the first sealing groove 24 of the valve body is greater than the depth of the second sealing groove 28 of the valve body, and the depth is staggered to ensure the close connection and effective sealing between the intermediate sleeve and the bidirectional lock valve body, and further improve the reliability of the bidirectional lock.

[0022] The intermediate sleeve is provided with an intermediate sleeve communication hole 30 on the inner wall of the through hole 18 of the intermediate sleeve, which is communicated with the second sealing groove 27 of the intermediate sleeve, and the second sealing gasket 9 is extruded by liquid flow to ensure the sealing tightness.

[0023] The number of the valve body threaded holes 25 and the anti-shifting screws 12 is two, so that the intermediate sleeve 5 is balanced when the whole is stressed, and the service life of the intermediate sleeve 5 is improved.

[0024] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application are included in the protection scope of the present application.

Claims

1. A two-way lock, comprising a two-way lock valve body assembly (1), a pilot valve core assembly (2), and a one-way valve assembly (3), characterized in that: The pilot valve core assembly (2) includes an intermediate sleeve (5), inlet sleeves (6) at both ends of the intermediate sleeve (5), a push rod (7) that moves within the intermediate sleeve (5) and the inlet sleeves (6) and drives the one-way valve assembly (3) at both ends, and a large spring (8) sleeved at both ends of the push rod (7). The bidirectional locking valve body assembly (1) includes a bidirectional locking valve body (11), an anti-slip screw (12), and a first sealing gasket (13). The bidirectional locking valve body (11) has a transversely arranged valve body internal hole (15), and the middle of the outer wall of the bidirectional locking valve body (11) has a valve body internal groove (). 17), the outer wall of the bidirectional locking valve body (11) is provided with valve body liquid flow holes (16) arranged longitudinally and communicating with the valve body internal hole (15) at both ends of the valve body internal groove (17), the intermediate sleeve (5) is placed in the middle of the valve body internal hole (15), the intermediate sleeve (5) is provided with an intermediate sleeve internal through hole (18), the middle outer wall of the intermediate sleeve (5) is provided with an intermediate sleeve external thread (19), the middle part of the intermediate sleeve external thread (19) is provided with an intermediate sleeve anti-slip groove (20), and the outer wall of the intermediate sleeve (5) is provided with an intermediate sleeve first sealing groove (21) at both ends of the intermediate sleeve external thread (19). The inner wall of the valve body's built-in hole (15) is provided with a valve body internal thread (23) that is threadedly connected to the external thread (19) of the intermediate sleeve. The inner wall of the valve body's built-in hole (15) is provided with valve body first sealing grooves (24) at both ends of the valve body internal thread (23). The bottom of the valve body internal groove (17) is provided with a valve body thread hole (25) that communicates with the valve body's built-in hole (15). After the anti-slip screw (12) is threadedly connected to the valve body thread hole (25), its end is placed in the intermediate sleeve anti-slip groove (20). The first sealing gasket (13) is provided between the intermediate sleeve first sealing groove (21) and the valve body first sealing groove (24).

2. The bidirectional lock according to claim 1, characterized in that: The width of the external thread (19) of the intermediate sleeve is greater than the width of the internal thread (23) of the valve body.

3. The bidirectional lock according to claim 1, characterized in that: The outer wall of the intermediate sleeve (5) is provided with a second sealing groove (27) at both ends of the first sealing groove (21) of the intermediate sleeve, and the inner wall of the valve body internal hole (15) is provided with a second sealing groove (28) at both ends of the first sealing groove (24) of the valve body, and a second sealing gasket (9) is provided between the second sealing groove (27) of the intermediate sleeve and the second sealing groove (28) of the valve body.

4. The bidirectional lock according to claim 3, characterized in that: The depth of the second sealing groove (27) of the intermediate sleeve is greater than the depth of the first sealing groove (21) of the intermediate sleeve, and the depth of the first sealing groove (24) of the valve body is greater than the depth of the second sealing groove (28) of the valve body.

5. The bidirectional lock according to claim 3, characterized in that: The inner wall of the intermediate sleeve through hole (18) is provided with an intermediate sleeve connecting hole (30) that communicates with the second sealing groove (27) of the intermediate sleeve.

6. The two-way lock according to claim 1, characterized in that: The number of the valve body threaded hole (25) and the number of the anti-slip screw (12) are both 2.

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