Hydraulic control one-way valve

Abstract

The utility model relates to the field of hydraulic device structures, in particular to a hydraulic control one-way valve, a second valve sleeve is in threaded connection with a first valve sleeve to seal a valve core, and a valve seat is detachably arranged on the inner circumference of one end, close to the valve core, of the second valve sleeve. A second cavity and a third cavity which are arranged at an interval and are communicated through a first hole are formed in the middle axis of the second valve sleeve; according to the hydraulic control one-way valve, the number of parts of the whole valve sleeve is reduced, the structure of the valve seat is changed, and a foundation is provided for fixation of the second spring; the second valve sleeve is connected with the first valve sleeve, and the valve core and the piston are fixed, so that the whole valve string can be fixed without the help of the valve body, and the difficulty of installation and maintenance is reduced; and the installation and maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic device structure field especially relates to a liquid control check valve. BACKGROUND

[0002] In the prior art, in the coal mining industry, due to the diversity and complexity of mining environment, the performance of hydraulic support and its supporting equipment is required to be more strict and accurate. In the past few years, with the continuous progress and improvement of coal mining technology, the application range of large hydraulic support has become more and more extensive. In order to adapt to this trend, large support is urgently needed to be equipped with liquid control check valve with stable performance to realize accurate control of lifting.

[0003] In order to realize the working effect, the current liquid control check valve has relatively more parts and structures, which is not conducive to production, installation and maintenance. Specifically, in addition to the two valve sleeve main structures, the valve seat and the blocking ring structures are also needed, and the disassembly and installation process needs to be carried out in the valve body, which further increases the working difficulty of engineers and reduces the working efficiency. UTILITY MODEL CONTENTS

[0004] The main purpose of the utility model is to provide a liquid control check valve, which aims to solve the problem that the liquid control check valve has relatively more parts and structures, which is not conducive to production, installation and maintenance.

[0005] In order to realize the above purpose, the utility model provides a liquid control check valve, which comprises a valve body and a valve string installed on the valve body, characterized in that the valve string comprises:

[0006] A first valve sleeve is provided with a first cavity at the central axis, and a first groove is arranged on the outer periphery of the middle part of the first valve sleeve, and a first channel is arranged on the peripheral wall of the first valve sleeve to guide the first groove to the first cavity;

[0007] A valve core is movably arranged in the first cavity and corresponds to the first channel;

[0008] A first spring is compressed between the valve core and the first valve sleeve;

[0009] A second valve sleeve is threadedly connected to the first valve sleeve to close the valve core, and a valve seat is detachably arranged on the inner periphery of the end of the second valve sleeve close to the valve core, and a second cavity and a third cavity are arranged at the central axis of the second valve sleeve and are spaced apart but communicated through a first hole, and a second groove and a third groove are arranged at intervals on the outer periphery of the length direction of the second valve sleeve, and a second channel and a third channel are arranged on the peripheral wall of the second valve sleeve to guide the second groove to the second cavity and the third groove to the third cavity respectively, wherein the first groove also guides to the end of the first valve sleeve away from the second valve sleeve.

[0010] A piston, comprising a piston part movably arranged in the second cavity, an outer end surface of the piston part being connected with a top rod;

[0011] A second spring compressed between the piston part and the valve seat;

[0012] Wherein, a free end of the second valve sleeve is connected with the valve body.

[0013] Further, a first sealing ring sleeved on the top rod is compressed between the second spring and the piston part.

[0014] Further, the first sealing ring is multiple and stacked.

[0015] Further, a second sealing ring is clamped between the second valve sleeve and the first valve sleeve.

[0016] Further, the valve seat and the second valve sleeve are connected in a threaded connection mode.

[0017] Further, the valve seat and the second valve sleeve are connected in a sleeving or threaded connection mode, and the valve seat abuts against the first valve sleeve.

[0018] Further, the number of the first channels on the first valve sleeve is at least four and uniformly arranged around the circumference, and the number of the second channels and the third channels on the second valve sleeve is at least four and uniformly arranged around the circumference.

[0019] Further, the free end of the second valve sleeve is provided with external threads.

[0020] Further, the second valve sleeve is provided with multiple sealing ring structures corresponding to the second groove and the third groove.

[0021] Further, the piston part is provided with a sealing ring structure clamped thereon.

[0022] The hydraulic control check valve provided by the utility model reduces the number of parts of the entire valve sleeve, changes the structure of the valve seat, and provides a basis for fixing the second spring; the second valve sleeve is connected with the first valve sleeve, and the valve core and the piston are fixed, so that the entire valve string can be fixed without the aid of the valve body, and the difficulty of installation and maintenance is reduced; and the efficiency of installation and maintenance is improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic view (free state) of the hydraulic control check valve of the first embodiment of the utility model;

[0024] Figure 2is a schematic diagram of the first embodiment of the hydraulic control check valve (valve core is pressed by hydraulic oil state);

[0025] Figure 3 is a schematic diagram of the first embodiment of the hydraulic control check valve (valve core is pressed by hydraulic oil state);

[0026] Figure 4 is a sectional view of the valve string in the first embodiment of the hydraulic control check valve (first view angle);

[0027] Figure 5 is a sectional view of the valve string in the first embodiment of the hydraulic control check valve (second view angle);

[0028] Figure 6 is a schematic diagram of the piston part in the second embodiment of the hydraulic control check valve.

[0029] The realization, functional features and advantages of the present application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] It should be understood that the specific embodiments described herein merely set forth preferred combinations of components and / or other features, and that persons of ordinary skill in the art will appreciate that other combinations of components and / or other features are also possible.

[0031] Those skilled in the art can understand that, unless specifically stated, the singular form "a", "an", "said" and "the" used herein also includes the plural form. It should be further understood that the phrase "comprising" used in the specification of the present application means that the features, integers, steps, operations, elements, units, modules and / or components exist, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or combinations thereof. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there can be an intermediate element. In addition, "connected" or "coupled" used herein can include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of the associated listed items.

[0032] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as that generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have meanings consistent with those in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as such.

[0033] Reference Figures 1 to 6 The utility model discloses an embodiment, a hydraulic control check valve, including valve body 010 and install in valve body 010's valve string 020, its characterized in that, valve string 020 includes:

[0034] First valve sleeve 100, the first cavity 110 is arranged at the central axis, the outer periphery of the length middle part of first valve sleeve 100 is provided with first groove 120, and the first channel 130 that first groove 120 is led to the first cavity 110 is arranged on the peripheral wall of first valve sleeve 100;

[0035] Valve core 200, the first channel 130 is arranged in the first cavity 110 and is correspondingly arranged;

[0036] First spring 300 is compressed between valve core 200 and first valve sleeve 100;

[0037] Second valve sleeve 400 is screwed on first valve sleeve 100 and closes valve core 200, and the inner periphery of the end close to valve core 200 of second valve sleeve 400 can be detachably provided with valve seat 410, the second cavity 430 and the third cavity 440 that are spaced apart but are communicated through the first hole 420 are arranged at the central axis of second valve sleeve 400, and the outer periphery of the length direction of second valve sleeve 400 is spaced apart and provided with second groove 450 and third groove 460, and the second channel 470 and the third channel 480 that respectively lead second groove 450 to second cavity 430 and lead third groove 460 to third cavity 440 are arranged on the peripheral wall of second valve sleeve 400, wherein, first groove 120 also leads to the end of first valve sleeve 100 away from second valve sleeve 400;

[0038] Piston, including piston part 510 that is movably arranged in second cavity 430, and the outer side end surface of piston part 510 is connected with top rod 520;

[0039] Second spring 600 is compressed between piston part 510 and valve seat 410;

[0040] Wherein, the free end of second valve sleeve 400 is connected with valve body 010.

[0041] In the prior art, in order to realize the working effect, the hydraulic control check valve has relatively more part structures, which is not conducive to production, installation and maintenance; in addition to two valve sleeve main structures, it also needs to adapt valve seat and other structures, and the process of disassembling and installing needs to be carried out in the valve body, which further increases the working difficulty of engineers and reduces the working efficiency.

[0042] The liquid control check valve comprises a valve body 010 and a valve string 020 installed on the valve body 010.

[0043] The valve string 020 comprises a first valve sleeve 100. The first valve sleeve 100 is provided with a first cavity 110 at the axis. The outer periphery of the middle part of the first valve sleeve 100 is provided with a first groove 120. The valve body 010 is provided with a first joint port 001 connected to the first groove 120. The first valve sleeve 100 is provided with a first channel 130 leading from the first groove 120 to the first cavity 110. The number, structure and form of the first channel 130 are not limited, and the first channel 130 can only lead the first groove 120 and the first cavity 110. The bottom of the first cavity 110 can be provided with a second hole.

[0044] The valve core 200 is movably arranged in the first cavity 110 and corresponds to the first channel 130. The movement of the valve core 200 can close and release the first channel 130. The valve body 010 is provided with a second joint port 002 corresponding to the end of the first valve sleeve 100 away from the valve core 200.

[0045] The first spring 300 is compressed between the valve core 200 and the first valve sleeve 100.

[0046] The second valve sleeve 400 is screwed to the first valve sleeve 100 to close the valve core 200. The inner periphery of the end of the second valve sleeve 400 close to the valve core 200 is detachably provided with a valve seat 410. The combination between the valve seat 410 and the second valve sleeve 400 can be various, for example, preferably threaded connection. The valve core 200 corresponds to the valve seat 410. In the free state, the valve core 200 and the valve seat 410 form a seal, and the valve core 200 closes the first channel 130. The second valve sleeve 400 is provided with a second cavity 430 and a third cavity 440 arranged at intervals at the axis and communicated through a first hole 420. The outer periphery of the second valve sleeve 400 in the length direction is provided with a second groove 450 and a third groove 460, and the second valve sleeve 400 is provided with a second channel 470 and a third channel 480 on the wall, which respectively lead the second groove 450 to the second cavity 430 and the third groove 460 to the third cavity 440. The valve body 010 is provided with a third joint port 003 and a fourth joint port 004 connected to the second groove 450 and the third groove 460, respectively. The number, structure and form of the second channel 470 are not limited, and the second channel 470 can only lead the second groove 450 and the second cavity 430. The number, structure and form of the third channel 480 are not limited, and the third channel 480 can only lead the third groove 460 and the third cavity 440.

[0047] The piston comprises a piston part 510 movably arranged in the second cavity 430, and the piston part 510 is connected with a top rod 520 at the outer side end face. The top rod 520 of the piston corresponds to the valve core 200.

[0048] The second spring 600 is compressed between the piston part 510 and the valve seat 410. The valve seat 410 can be provided with a protruding table structure or the like for the second spring 600, thereby providing a basis for the fixation of the second spring 600.

[0049] The free end of the second valve sleeve 400 is connected with the valve body 010.

[0050] During installation, the piston and the second spring 600 are installed in the second cavity 430 of the second valve sleeve 400; the first spring 300 and the valve core 200 are installed in the first valve sleeve 100; and then the first valve sleeve 100 and the second valve sleeve 400 are connected, at which time the valve string 020 forms an integral whole.

[0051] During use, the second joint port 002 is connected to the rodless cavity of the jack, and the third cavity 440 is connected to the rod cavity of the jack. When high-pressure oil is introduced into the third joint port 003, the valve core 200 is driven away from the valve seat 410 by pressure, at which time the first channel 130 is released, the high-pressure oil enters the first groove 120 and the end of the first valve sleeve 100 away from the second valve sleeve 400, and finally enters the second joint port 002, completing the jacking action of the jack. When the jacking action is completed, the introduction of high-pressure oil into the third joint port 003 is stopped, at which time the valve core 200 is closed under the action of the first spring 300. When the jack needs to complete the lowering action, high-pressure oil is introduced into the fourth joint port 004, and the piston drives the valve core 200 away from the valve seat 410, and the high-pressure oil in the rodless cavity flows back to the third joint port 003.

[0052] In summary, the number of parts of the entire valve sleeve is reduced, the structure of the valve seat 410 is changed, and a basis is provided for the fixation of the second spring 600; the second valve sleeve 400 is connected with the first valve sleeve 100, and the valve core 200 and the piston are fixed, thereby the entire valve string 020 can be fixed without the aid of the valve body 010, reducing the difficulty of installation and maintenance; and the efficiency of installation and maintenance is improved.

[0053] Reference Figure 6 In one embodiment, the second spring 600 is compressed between the piston part 510 and the piston part 510 with a first sealing ring 700 sleeved on the top rod 520.

[0054] In this embodiment, the sealing effect of the piston is better through the provision of the first sealing ring 700, and the first sealing ring 700 provides superior sealing effect in the axial and radial directions through the elastic compression of the second spring 600.

[0055] In one embodiment, the number of first sealing rings 700 is multiple and stacked.

[0056] In the embodiment, the arrangement of the first sealing ring 700 is limited, and the sealing effect is further improved. The cross section of the first sealing ring 700 can be V-shaped, facilitating stacking and providing deformation and sealing effect.

[0057] In one embodiment, a second sealing ring is clamped between the second valve sleeve 400 and the first valve sleeve 100.

[0058] In the embodiment, by clamping the second sealing ring between the first valve sleeve 100 and the second valve sleeve 400, the sealing effect between the first valve sleeve 100 and the second valve sleeve 400 is improved through the deformation of the second sealing ring.

[0059] In one embodiment, the connection between the valve seat 410 and the second valve sleeve 400 is threaded connection.

[0060] In the embodiment, the valve seat 410 is limited in arrangement, and the threaded connection has strong stability.

[0061] In one embodiment, the connection between the valve seat 410 and the second valve sleeve 400 is threaded connection or sleeve connection, and the valve seat 410 abuts against the first valve sleeve 100.

[0062] In the embodiment, the valve seat 410 is limited in arrangement, and the sleeve connection is simple in processing and operation. After the first valve sleeve 100 and the second valve sleeve 400 are connected, the valve seat 410 needs to be clamped by the first valve sleeve 100 and the second valve sleeve 400. Then the valve seat 410 is only sleeved on the inner wall of the second valve sleeve 400, and after the overall assembly is completed, the valve seat 410 is naturally fixed.

[0063] In one embodiment, the number of the first channels 130 on the peripheral wall of the first valve sleeve 100 is at least four and uniformly arranged, and the number of the second channels 470 and the third channels 480 on the peripheral wall of the second valve sleeve 400 is at least four and uniformly arranged.

[0064] In the embodiment, the arrangement of the first channels 130, the second channels 470 and the third channels 480 is given, so that the high-pressure oil can flow smoothly in the work.

[0065] In one embodiment, the free end of the second valve sleeve 400 is provided with external threads.

[0066] In the embodiment, the second valve sleeve 400 is connected to the valve body 010 by threaded connection, which has the characteristic of superior sealing effect.

[0067] In one embodiment, the second valve sleeve 400 is provided with a plurality of sealing ring structures corresponding to the outer periphery of the second groove 450 and the third groove 460.

[0068] In the embodiment, the second valve sleeve 400 is provided with a plurality of sealing ring structures corresponding to the outer periphery of the second groove 450 and the third groove 460.

[0069] In one embodiment, the piston part 510 is provided with a sealing ring structure on the outer periphery.

[0070] In the embodiment, the piston part 510 is provided with a sealing ring structure on the outer periphery, thereby improving the sealing environment of the piston part 510.

[0071] In summary, the hydraulic control check valve provided by the utility model reduces the number of parts of the entire valve sleeve, changes the structure of the valve seat 410, and provides a basis for fixing the second spring 600; the second valve sleeve 400 is connected with the first valve sleeve 100, and the valve core 200 and the piston are fixed, so that the entire valve string 020 can be fixed without the valve body 010, thereby reducing the difficulty of installation and maintenance, and improving the installation and maintenance efficiency.

[0072] The above description is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation, direct or indirect application in other related technical fields by using the content of the utility model specification and drawings are also included in the patent protection range of the utility model.

Claims

1. A pilot operated check valve comprising a valve body and a valve string mounted to the valve body, characterized by, The valve string comprises: a first valve sleeve, provided with a first cavity at the central axis, and provided with a first groove at the outer periphery of the middle part of the length of the first valve sleeve, and provided with a first channel on the peripheral wall of the first valve sleeve, the first channel leading to the first groove and the first cavity; a valve core, movably arranged in the first cavity and corresponding to the first channel; a first spring, compressed between the valve core and the first valve sleeve; a second valve sleeve, threadedly connected to the first valve sleeve to seal the valve core, the inner periphery of the end of the second valve sleeve close to the valve core being detachably provided with a valve seat, the central axis of the second valve sleeve being provided with a second cavity and a third cavity arranged at intervals but connected through a first hole, the outer periphery of the length of the second valve sleeve being provided with a second groove and a third groove at intervals, the peripheral wall of the second valve sleeve being provided with a second channel and a third channel respectively leading the second groove to the second cavity and the third groove to the third cavity, wherein the first groove also leads to the end of the first valve sleeve away from the second valve sleeve; a piston, comprising a piston part movably arranged in the second cavity, and a top rod connected to the outer end surface of the piston part; a second spring, compressed between the piston part and the valve seat; wherein the free end of the second valve sleeve is connected to the valve body.

2. The pilot operated check valve of claim 1, wherein, A first sealing ring is sleeved on the top rod and compressed between the second spring and the piston part.

3. The pilot operated check valve of claim 2, wherein, The number of the first sealing ring is multiple and stacked.

4. The pilot operated check valve of claim 1, wherein, A second sealing ring is clamped between the second valve sleeve and the first valve sleeve.

5. The pilot operated check valve of claim 1, wherein, The valve seat and the second valve sleeve are connected in a threaded connection.

6. The pilot operated check valve of claim 1, wherein, The valve seat and the second valve sleeve are connected in a sleeving or threaded connection, and the valve seat abuts against the first valve sleeve.

7. The pilot operated check valve according to any one of claims 1 to 6, characterized in that The number of the first channel on the peripheral wall of the first valve sleeve is at least four and uniformly arranged around the peripheral wall, and the number of the second channel and the third channel on the peripheral wall of the second valve sleeve is at least four and uniformly arranged around the peripheral wall.

8. The pilot operated check valve according to any one of claims 1 to 6, characterized in that The free end of the second valve sleeve is provided with external threads.

9. The pilot operated check valve according to any one of claims 1 to 6, wherein, The outer periphery of the second valve sleeve is provided with multiple sealing ring structures corresponding to the second groove and the third groove.

10. The pilot operated check valve according to any one of claims 1 to 6, wherein, The outer periphery of the piston part is provided with a sealing ring structure clamped thereon.

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