Electro-hydraulic control reversing valve

Abstract

The electro-hydraulic control reversing valve comprises a main body and wire holders, the wire holders are located on the left side and the right side of the upper portion of the main body, connecting ends are fixedly connected to the left side wall and the right side wall of the main body, and connecting holes are fixedly connected to the peripheries of the outer side walls of the connecting ends on the left side and the right side. Connecting seats are fixedly connected to the front side wall and the rear side wall of the main body, a mounting seat is fixedly connected to the top of the main body, a valve body is placed on the top of the mounting seat, and a connecting-in pile is fixedly connected to the bottom of the valve body. According to the electro-hydraulic control reversing valve, the structural design is reasonable, the valve body can be quickly and conveniently disassembled and assembled, the maintenance work of the valve body is facilitated, the fixing firmness of a cable can be effectively improved, and the cable is prevented from loosening and falling off due to the influence of vibration.

Description

Technical Field

[0001] The utility model relates to the technical field of reversing valves, in particular to an electro-hydraulic controlled reversing valve. Background Technique

[0002] The background electro-hydraulic reversing valve is a hydraulic reversing valve integrated with a pilot valve controlled by an electromagnet. The spool is pushed by the pressure oil in the control oil circuit. The electro-hydraulic reversing valve and the hydraulic control reversing valve are mainly used in hydraulic systems where the flow rate exceeds the normal working range allowed by the electromagnetic reversing valve to control the movement of the actuator or the flow direction of the oil. In the operation of coal seam mining, among the oil supply paths of the equipment, the electro-hydraulic reversing valve is one of the commonly used valve body structures.

[0003] Most of the existing valve body connection structures of electro-hydraulic controlled reversing valves are fixed to the valve body by multiple fixing bolts, resulting in a relatively long time required for disassembling and installing the valve body when it needs to be disassembled and repaired. In addition, the cable connection structure of the existing electro-hydraulic controlled reversing valve lacks a limit fixing device. Since mechanical vibrations occur during the operation in the mine, the cables will loosen and fall off at the connection holes after being affected by vibrations for a long time. For this reason, we have proposed an electro-hydraulic controlled reversing valve. Content of the Utility Model

[0004] The purpose of the utility model is to provide an electro-hydraulic controlled reversing valve to solve the problems raised in the above background technique, that is, most of the existing valve body connection structures of electro-hydraulic controlled reversing valves are fixed to the valve body by multiple fixing bolts, resulting in a relatively long time required for disassembling and installing the valve body when it needs to be disassembled and repaired, and the cable connection structure of the electro-hydraulic controlled reversing valve lacks a limit fixing device. Since mechanical vibrations occur during the operation in the mine, the cables will loosen and fall off at the connection holes after being affected by vibrations for a long time.

[0005] To achieve the above object, the present utility model provides the following technical solution: An electro-hydraulic control reversing valve, comprising a main body and a wiring seat. The wiring seat is located on the upper left and right sides of the main body. The left and right side walls of the main body are fixedly connected with connection ends. The outer side walls of the left and right connection ends are fixedly connected with connection holes around, and the connection holes are evenly distributed. The front and rear side walls of the main body are fixedly connected with connection seats. The top of the main body is fixedly connected with a mounting seat. A valve body is placed on the top of the mounting seat. The bottom of the valve body is fixedly connected with an access pile. The bottom end of the access pile penetrates through the mounting seat and extends between the inner side walls of the mounting seat. The left and right sides inside the mounting seat are provided with first mounting grooves. A tenon is slidably connected between the inner side walls of the left and right first mounting grooves. The ends of the left and right tenons penetrate through the mounting seat and extend into the interior of the access pile, and the left tenon is inserted into the right tenon. The left and right side walls of the mounting seat are inserted with threaded connecting rods. The ends of the left and right threaded connecting rods penetrate through the mounting seat and extend into the inner cavities of the left and right first mounting grooves, and the ends of the left and right threaded connecting rods are rotatably connected with the left and right tenons. The outer side walls of the left and right threaded connecting rods are sleeved with first return springs. The left and right side walls of the valve body are fixedly connected with electro-hydraulic connection piles. The upper sides of the outer side walls of the left and right electro-hydraulic connection piles are fixedly connected with the left and right wiring seats.

[0006] As a further description of the above technical solution:

[0007] The outer side walls of the left and right wiring seats are provided with wiring holes. The top of the left and right wiring seats is screwed with compression bolts.

[0008] As a further description of the above technical solution:

[0009] The bottom ends of the left and right compression bolts penetrate through the left and right wiring seats and extend into the inner cavities of the left and right wiring seats.

[0010] As a further description of the above technical solution:

[0011] The rear sides inside the left and right wiring seats are provided with second mounting grooves. A clamping tenon is slidably connected to the inner side wall of the inner cavity of the second mounting groove.

[0012] As a further description of the above technical solution:

[0013] The front end of the clamping tenon penetrates through the second mounting groove, the compression bolt and extends to the front side inside the wiring seat.

[0014] As a further description of the above technical solution:

[0015] A pull rod is inserted into the rear side wall of the terminal block. The front end of the pull rod penetrates through the terminal block and extends into the inner cavity of the terminal block. The front end of the pull rod is fixedly connected to the tenon, and a second return spring is sleeved on the outer side wall of the pull rod.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. For this electro-hydraulic control reversing valve, when it is necessary to disassemble and repair the valve body, by pulling the threaded connecting rod on one side, the tenon at the end of the threaded connecting rod squeezes the first return spring, so that the tenon cancels the fixation of the access pile and resets to the first installation groove. Then rotate the threaded connecting rod so that the threaded part of the threaded connecting rod is screwed with the mounting seat. After that, repeat the above steps to cancel the fixation of the tenon on the other side to the access pile. Then take out the valve body whose fixation has been cancelled for maintenance. After the maintenance is completed, reinstall the valve body into the mounting seat. Then rotate the threaded connecting rods on both sides to cancel the screwing of the threaded connecting rods on both sides with the mounting seat, so that the first return spring squeezed by the tenon is reset, and the tenon is pushed to move to reconnect to the access pile for fixation. Therefore, the valve body can be disassembled and installed quickly and conveniently, which is convenient for the maintenance work of the valve body.

[0018] 2. For this electro-hydraulic control reversing valve, after the cable is installed into the access hole, by pulling the pull rod, the tenon connected to the pull rod squeezes the second return spring and then resets to the second installation groove. Then rotate the compression bolt so that the bottom end of the compression bolt squeezes the cable to fix the cable. After that, loosen the pull rod so that the second return spring squeezed by the tenon is reset, and the tenon is pushed to insert into the compression bolt to limit the compression bolt, preventing the compression bolt from loosening. Therefore, the fixing firmness of the cable can be effectively improved, and the cable can be prevented from loosening and falling off due to vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of an electro-hydraulic control reversing valve proposed by the present utility model;

[0020] Figure 2 is a front view sectional structural schematic diagram of an electro-hydraulic control reversing valve proposed by the present utility model;

[0021] Figure 3 is a right view sectional structural schematic diagram of an electro-hydraulic control reversing valve proposed by the present utility model;

[0022] Figure 4 is an electro-hydraulic control reversing valve proposed by the present utility model Figure 3 enlarged structural schematic diagram at A in.

[0023] In the figure: 100, main body; 110, connection end; 111, connection hole; 120, connection base; 130, mounting base; 140, valve body; 141, access pile; 150, first mounting groove; 151, tenon; 160, threaded connecting rod; 161, first return spring; 170, electro-hydraulic connection pile; 200, wiring base; 210, wiring hole; 220, compression bolt; 230, second mounting groove; 231, mortise; 240, pull rod; 241, second return spring. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0026] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0027] The present invention provides an electro-hydraulic control reversing valve, which can quickly and conveniently disassemble and install the valve body, facilitate the maintenance work of the valve body, effectively improve the fixing firmness of the cable, and prevent the cable from loosening and falling off due to vibration. Please refer to Figures 1-4, including a main body 100 and a terminal block 200;

[0028] Please refer to again Figures 1-3, the main body 100 is used for installing the main structure. The left and right side walls of the main body 100 are fixedly connected with connecting ends 110, and the connecting ends 110 are used for installing connecting holes 111. The outer side walls of the left and right connecting ends 110 are fixedly connected with connecting holes 111 around the circumference. The connecting holes 111 are used for connecting with the oil circuit, and the connecting holes 111 are evenly distributed. The front and rear side walls of the main body 100 are fixedly connected with connecting seats 120, and the connecting seats 120 are used for installing the main body 100 onto the equipment. The top of the main body 100 is fixedly connected with a mounting seat 130, and a valve body 140 is placed on the top of the mounting seat 130. The bottom of the valve body 140 is fixedly connected with an access pile 141, and the access pile 141 is used for connecting with the main body 100. The bottom end of the access pile 141 penetrates through the mounting seat 130 and extends between the inner side walls of the mounting seat 130. The left and right sides inside the mounting seat 130 are provided with first mounting grooves 150, and the first mounting grooves 150 are used for installing tenons 151. A tenon 151 is slidably connected between the inner side walls of the left and right first mounting grooves 150. The tenon 151 is used for fixing the access pile 141. The ends of the left and right tenons 151 penetrate through the mounting seat 130 and extend into the interior of the access pile 141, and the left tenon 151 is inserted into the right tenon 151. The left and right side walls of the mounting seat 130 are inserted with threaded connecting rods 160, and the threaded connecting rods 160 are used for connecting the tenons 151. The ends of the left and right threaded connecting rods 160 penetrate through the mounting seat 130 and extend into the inner cavities of the left and right first mounting grooves 150, and the ends of the left and right threaded connecting rods 160 are rotatably connected with the left and right tenons 151. The outer side walls of the left and right threaded connecting rods 160 are sleeved with first return springs 161, and the first return springs 161 are used for resetting the tenons 151. The left and right side walls of the valve body 140 are fixedly connected with electro-hydraulic connecting piles 170, and the electro-hydraulic connecting piles 170 are used for connecting with the equipment. The upper sides of the outer side walls of the left and right electro-hydraulic connecting piles 170 are fixedly connected with the left and right terminal blocks 200. When it is necessary to disassemble and repair the valve body 140, by pulling one of the threaded connecting rods 160 to squeeze the first return spring 161 by the tenon 151 at the end of the threaded connecting rod 160, the tenon 151 cancels the fixation of the access pile 141 and resets into the first mounting groove 150. Then, rotate the threaded connecting rod 160 to make the threaded part of the threaded connecting rod 160 threadedly connected with the mounting seat 130. After that, repeat the above steps to make the tenon 151 on the other side cancel the fixation of the access pile 141. Then, take out the valve body 140 whose fixation has been cancelled for overhaul. After the overhaul is completed, reinstall the valve body 140 into the mounting seat 130. Then, rotate the two threaded connecting rods 160 to cancel the threaded connection between the two threaded connecting rods 160 and the mounting seat 130, so that the first return spring 161 squeezed by the tenon 151 is reset, and push the tenon 151 to move to fix the access pile 141 again;

[0029] In summary, the valve body 140 can be disassembled and installed quickly and conveniently, facilitating the maintenance work of the valve body 140;

[0030] Please refer to again Figures 1-4 , the terminal blocks 200 are located on the upper left and right sides of the main body 100. Specifically, the terminal blocks 200 are fixedly connected to the upper left and right sides of the main body 100 through the electro-hydraulic connection posts 170 on the left and right sides. Wiring holes 210 are formed in the outer side walls of the terminal blocks 200 on the left and right sides. The wiring holes 210 are used for connecting cables. Compression bolts 220 are screwed on the tops of the terminal blocks 200 on the left and right sides. The bottom ends of the compression bolts 220 on the left and right sides penetrate through the terminal blocks 200 on the left and right sides and extend into the inner cavities of the terminal blocks 200 on the left and right sides. Second installation grooves 230 are formed in the inner rear sides of the terminal blocks 200 on the left and right sides. The second installation grooves 230 are used for installing the tenons 231. The tenons 231 are slidably connected to the inner side walls of the inner cavities of the second installation grooves 230. The tenons 231 are used for fixing the compression bolts 220. The front ends of the tenons 231 penetrate through the second installation grooves 230 and the compression bolts 220 and extend to the inner front sides of the terminal blocks 200. A pull rod 240 is inserted into the rear side wall of the terminal block 200. The pull rod 240 is used for connecting the tenon 231. The front end of the pull rod 240 penetrates through the terminal block 200 and extends into the inner cavity of the terminal block 200. And the front end of the pull rod 240 is fixedly connected to the tenon 231. A second return spring 241 is sleeved on the outer side wall of the pull rod 240. The second return spring 241 is used for resetting the tenon 231. When the cable is installed into the hole, by pulling the pull rod 240, the tenon 231 connected to the pull rod 240 squeezes the second return spring 241 and then resets into the second installation groove 230. Subsequently, by rotating the compression bolt 220, the bottom end of the compression bolt 220 squeezes the cable to fix the cable. After the cable is fixed, the pull rod 240 is released to enable the second return spring 241 squeezed by the tenon 231 to reset, and the tenon 231 is pushed to insert into the compression bolt 220 to limit the compression bolt 220 and prevent the compression bolt 220 from loosening;

[0031] In summary, the fixing firmness of the cable can be effectively improved, and the cable can be prevented from loosening and falling off due to vibration;

[0032] In specific use, when a person skilled in the art needs to disassemble and repair the valve body 140, by pulling the threaded connecting rod 160 on one side, the tenon 151 at the end of the threaded connecting rod 160 squeezes the first return spring 161, so that the tenon 151 cancels the fixation of the inserted pile 141 and resets to the first installation groove 150. Then, rotate the threaded connecting rod 160 so that the threaded part of the threaded connecting rod 160 is screwed with the mounting seat 130. After that, repeat the above steps to cancel the fixation of the tenon 151 on the other side to the inserted pile 141. Then, take out the valve body 140 whose fixation has been cancelled and repair the valve body 140. After the repair is completed, reinstall the valve body 140 into the mounting seat 130. Then, rotate the threaded connecting rods 160 on both sides to cancel the screwing of the threaded connecting rods 160 on both sides with the mounting seat 130, so that the first return spring 161 squeezed by the tenon 151 is reset, and the tenon 151 is pushed to move to reconnect and fix the inserted pile 141. When the cable is installed into the access hole, by pulling the pull rod 240, the tenon 231 connected to the pull rod 240 squeezes the second return spring 241 and then resets to the second installation groove 230. Then, by rotating the compression bolt 220, the bottom end of the compression bolt 220 squeezes the cable. After the cable is fixed, release the pull rod 240 so that the second return spring 241 squeezed by the tenon 231 is reset, and the tenon 231 is pushed to insert into the compression bolt 220 to limit the compression bolt 220 and prevent the compression bolt 220 from loosening.

[0033] In the description of this specification, the descriptions referring to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electro-hydraulic controlled reversing valve, characterized in that: The invention comprises a main body (100) and a wiring seat (200), wherein the wiring seat (200) is located on the left and right sides of the upper part of the main body (100), the left and right side walls of the main body (100) are fixedly connected with connecting ends (110), the outer side walls of the connecting ends (110) on the left and right sides are fixedly connected with connecting holes (111) around the periphery, and the connecting holes (111) are evenly distributed, the front and rear side walls of the main body (100) are fixedly connected with connecting seats (120), and the main body (100) is fixedly connected with the connecting seat (120). 0) is fixedly connected to the top of a mounting seat (130), a valve body (140) is placed on the top of the mounting seat (130), an access pile (141) is fixedly connected to the bottom of the valve body (140), the bottom end of the access pile (141) passes through the mounting seat (130) and extends to between the inner side walls of the mounting seat (130), and first mounting grooves (150) are opened on the left and right sides of the interior of the mounting seat (130), and the first mounting grooves (150) on the left and right sides are A tenon (151) is slidably connected between the inner side walls of the inner cavity, and the ends of the tenons (151) on the left and right sides penetrate the mounting seat (130) and extend to the inside of the access pile (141), and the left tenon (151) is plugged into the right tenon (151), and the left and right side walls of the mounting seat (130) are plugged with threaded connecting rods (160), and the ends of the threaded connecting rods (160) on the left and right sides penetrate the mounting seat (130) and extend to the left and right sides. The inner cavity of the first installation groove (150), and the ends of the threaded connecting rods (160) on the left and right sides are rotatably connected to the tenons (151) on the left and right sides, the outer side walls of the threaded connecting rods (160) on the left and right sides are sleeved with first return springs (161), the left and right side walls of the valve body (140) are fixedly connected with electro-hydraulic connection piles (170), and the upper sides of the outer side walls of the electro-hydraulic connection piles (170) on the left and right sides are fixedly connected to the wiring seats (200) on the left and right sides.

2. The electro-hydraulic controlled reversing valve according to claim 1, characterized in that: The outer side walls of the wiring seats (200) on the left and right sides are provided with wiring holes (210), and the tops of the wiring seats (200) on the left and right sides are screwed with clamping bolts (220).

3. The electro-hydraulic controlled reversing valve according to claim 2, characterized in that: The bottom ends of the clamping bolts (220) on the left and right sides penetrate the wiring bases (200) on the left and right sides and extend to the inner cavities of the wiring bases (200) on the left and right sides.

4. The electro-hydraulic controlled reversing valve according to claim 3, characterized in that: A second installation groove (230) is formed on the inner rear side of the left and right wiring seats (200), and a tenon (231) is slidably connected to the inner side wall of the inner cavity of the second installation groove (230).

5. The electro-hydraulic controlled reversing valve according to claim 4, characterized in that: The front end of the tenon (231) passes through the second installation slot (230) and the clamping bolt (220) and extends to the inner front side of the wiring seat (200).

6. The electro-hydraulic controlled reversing valve according to claim 5, characterized in that: A pull rod (240) is inserted into the rear side wall of the wiring seat (200), the front end of the pull rod (240) passes through the wiring seat (200) and extends to the inner cavity of the wiring seat (200), and the front end of the pull rod (240) is fixedly connected to the tenon (231), and the outer side wall of the pull rod (240) is sleeved with a second return spring (241).

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