CN203757060U - check valve - Google Patents

Abstract

The utility model provides a check valve which comprises a valve body, a plug, a screw plug, a valve sleeve, a conical valve core and a piston, wherein a first thread hole, a piston hole, an oil conveying hole, an oil storage cavity and a second thread hole are formed in the valve body in sequence from left to right; the plug is connected to the first thread hole in a sealed manner; the screw plug is connected into the second thread hole in a sealed manner; the valve sleeve is fixedly mounted in the oil storage cavity; an oil inlet hole is formed in the front end face of the valve sleeve; an oil outlet hole is formed in the side wall of the valve sleeve; the conical valve core is arranged in the valve sleeve in a sliding fit manner; a spring is arranged at the rear end of the conical valve core; the piston is arranged in the piston hole in a sliding fit manner; a second piston body arranged in the oil conveying hole in a sliding fit manner is arranged at the right end of the piston; a mandril is arranged at the right end of the second piston body and penetrates through the oil inlet hole to be in contact with the conical valve core; a first oil inlet, a second oil inlet and a third oil inlet are formed in the bottom surface of the valve body. The check valve is simple and compact in structure, convenient and quick to assemble and good in liquid control effect, and runs stably.

Description

check valve

technical field

The utility model relates to a valve, in particular to a one-way valve.

Background technique

The hydraulic control check valve is a valve that can reverse the flow of the check valve by controlling the fluid pressure. This kind of valve occupies a more important position in the hydraulic support equipment of coal mine machinery. The traditional hydraulically controlled check valve has a complex structure, is difficult to assemble, and has poor hydraulic control effect.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to provide a one-way valve with simple and compact structure, convenient and fast assembly, stable operation and good hydraulic control effect.

(2) Technical solution

In order to solve the above technical problems, the utility model provides a one-way valve, including a valve body 1, a plug 2, a screw plug 3, a valve sleeve 4, a cone valve core 5 and a piston 6. The first threaded hole 101, the piston hole 102, the oil delivery hole 103, the oil storage chamber 104 and the second threaded hole 105 are provided in sequence on the right side, and the plug 2 is sealingly connected to the first threaded hole 101, and the screw The plug 3 is sealed and connected in the second threaded hole 105, the valve sleeve 4 is fixedly installed in the oil storage chamber 104, and the front end of the valve sleeve 4 is provided with an oil inlet connected to the oil delivery hole 103. hole 401, the side wall of the valve sleeve 4 is provided with an oil outlet hole 402 connecting the oil inlet hole 401 and the oil storage chamber, the cone valve core 5 is slidingly fitted in the valve sleeve 4, and the cone The rear end of the spool 5 is provided with a spring, the piston 6 is slidably fitted in the piston hole 102, and the right end of the piston 6 is provided with a second piston body 601 slidably fitted in the oil delivery hole 103, The right end of the second piston body 601 is provided with a push rod 602, and the push rod 602 contacts the cone valve core 5 after passing through the oil inlet hole 401, and the bottom surface of the valve body 1 is provided with a first inlet. An oil port 106, a second oil inlet 107 and a third oil inlet 108, the first oil inlet 106 communicates with the rodless cavity of the piston hole, the second oil inlet communicates with the oil delivery hole, The third oil inlet hole communicates with the oil storage chamber.

Further, a cavity 109 is provided between the piston hole 102 and the oil delivery hole, the diameter of the cavity 109 is larger than the diameter of the piston hole, and the side wall of the cavity 109 is provided with a wall extending to The fourth oil inlet 110 outside the valve body 1 .

Further, a top block 603 is provided at the rear end of the piston 6 .

Further, the end surface of the push rod 602 is an arc surface.

Further, there are four oil outlet holes and they are evenly distributed on the side wall of the valve sleeve 4 in the circumferential direction.

(3) Beneficial effects

The one-way valve of the utility model adopts the cooperation mode of the piston and the cone valve core to realize low-pressure control of high-pressure, stable and reliable operation, and the installation of plugs and screw plugs that are disassembled at both ends is convenient for daily maintenance and replacement of parts; the utility model The one-way valve has simple and compact structure, convenient and fast assembly, stable operation and good hydraulic control effect.

Description of drawings

Fig. 1 is the structural representation of the utility model check valve;

Fig. 2 is the structural representation of the valve body of check valve of the present utility model;

Fig. 3 is an enlarged view of part A in Fig. 1 .

Detailed ways

Referring to Figures 1 to 3, the utility model provides a one-way valve, including a valve body 1, a plug 2, a screw plug 3, a valve sleeve 4, a cone valve core 5 and a piston 6, and the valve body 1 is from left to right The first threaded hole 101, the piston hole 102, the oil delivery hole 103, the oil storage chamber 104 and the second threaded hole 105 are sequentially opened, the plug 2 is sealed and connected to the first threaded hole 101, and the screw plug 3 is sealed and connected to the second threaded hole. In the threaded hole 105, the valve sleeve 4 is fixedly installed in the oil storage chamber 104, an oil inlet 401 connected to the oil delivery hole 103 is opened on the front surface of the valve sleeve 4, and an oil inlet hole 401 connected to the oil delivery hole 103 is opened on the side wall of the valve sleeve 4 401 and the oil outlet hole 402 of the oil storage chamber. In this embodiment, there are four oil outlet holes and they are evenly distributed on the side wall of the valve sleeve 4 in the circumferential direction; The rear end of the core 5 is provided with a spring, which makes the cone valve core move toward the side of the oil delivery hole, the piston 6 is slipped in the piston hole 102, and the right end of the piston 6 is provided with a sliding fit in the oil delivery hole. The second piston body 601 in 103 is provided with a push rod 602 at the right end of the second piston body 601, and the push rod 602 contacts with the cone valve core 5 after passing through the oil inlet hole 401. In this embodiment, the end surface of the push rod 602 It is a circular arc surface, and the bottom surface of the valve body 1 is provided with a first oil inlet 106, a second oil inlet 107 and a third oil inlet 108, and the first oil inlet 106 communicates with the rodless cavity of the piston hole (that is, there is no One side of the rod), the second oil inlet is connected to the oil delivery hole, and the third oil inlet is connected to the oil storage chamber; in order to further improve the running stability, a cavity 109 is provided between the piston hole 102 and the oil delivery hole. The diameter of the cavity 109 is greater than the diameter of the piston hole, and a fourth oil inlet 110 extending to the outside of the valve body 1 is provided on the side wall of the cavity 109; in order to prevent the piston from being stuck, a top is provided at the rear end of the piston 6 block 603 .

The one-way valve of the utility model adopts the cooperation mode of the piston and the cone valve core to realize low-pressure control of high-pressure, stable and reliable operation, and the installation of plugs and screw plugs that are disassembled at both ends is convenient for daily maintenance and replacement of parts; the utility model The one-way valve has simple and compact structure, convenient and fast assembly, stable operation and good hydraulic control effect.

The above is only the preferred embodiment of the utility model, and it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the utility model, some improvements and modifications can also be made. And retouching should also be regarded as the protection scope of the present utility model.

Claims (5)

1. A one-way valve, characterized in that it includes a valve body (1), a plug (2), a screw plug (3), a valve sleeve (4), a cone valve core (5) and a piston (6). The valve body (1) is provided with a first threaded hole (101), a piston hole (102), an oil delivery hole (103), an oil storage chamber (104) and a second threaded hole (105) sequentially from left to right, The plug (2) is sealingly connected to the first threaded hole (101), the screw plug (3) is sealingly connected to the second threaded hole (105), and the valve sleeve (4) is fixed Installed in the oil storage chamber (104), the front end of the valve sleeve (4) is provided with an oil inlet hole (401) communicating with the oil delivery hole (103), and the side of the valve sleeve (4) The wall is provided with an oil outlet hole (402) connecting the oil inlet hole (401) and the oil storage chamber, the cone valve core (5) is slip-fitted in the valve sleeve (4), and the cone valve core The rear end of (5) is provided with a spring, the piston (6) is slidingly fitted in the piston hole (102), and the right end of the piston (6) is provided with a sliding fit in the oil delivery hole (103) Inside the second piston body (601), the right end of the second piston body (601) is provided with a push rod (602), and the push rod (602) passes through the oil inlet hole (401) and connects with the The cone valve core (5) contacts, the bottom surface of the valve body (1) is provided with a first oil inlet (106), a second oil inlet (107) and a third oil inlet (108), the first The oil inlet (106) communicates with the rodless chamber of the piston hole, the second oil inlet communicates with the oil delivery hole, and the third oil inlet communicates with the oil storage chamber. 2. The one-way valve according to claim 1, characterized in that: a cavity (109) is provided between the piston hole (102) and the oil delivery hole, and the diameter of the cavity (109) is larger than The diameter of the piston hole, and the side wall of the cavity (109) is provided with a fourth oil inlet (110) extending to the outside of the valve body (1). 3. The one-way valve according to claim 1, characterized in that: a top block (603) is provided at the rear end of the piston (6). 4. The one-way valve according to claim 1, characterized in that: the end surface of the push rod (602) is a circular arc surface. 5. The one-way valve according to claim 1, characterized in that there are four oil outlet holes and they are evenly distributed on the side wall of the valve sleeve (4) in the circumferential direction.