Novel oil way block valve

Abstract

The utility model discloses a novel oil way cut-off valve which comprises a valve body, a valve rod is in clearance fit with the interior of the valve body, the interior of the valve body is divided into an upper end portion, a cut-off portion and a lower end portion, the cut-off portion is located between the upper end portion and the lower end portion, one side of the cut-off portion is communicated with an oil pipe A, the other side of the cut-off portion is communicated with an oil pipe B, and a pressure reduction assembly is arranged on the upper end portion. A driving piece is arranged at the lower end part; when the pressure of the upper end part is reduced through the pressure reducing assembly, the hydraulic pressure of the upper end part is gradually larger than the driving force of the driving part of the lower end part, and the valve rod is pushed to move towards the lower end part until the valve rod blocks the oil pipe A and the oil pipe B, so that the oil path is cut off; the valve rod is driven to move downwards and move to a certain balance state, so that the oil pipe A and the oil pipe B are communicated, oil way communication is achieved, normal switching between communication and cut-off of the oil way in the valve body is facilitated, and abnormal action of the valve rod is avoided as much as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of a cut-off valve, in particular to a novel oil circuit cut-off valve. Background Art

[0002] It is mainly composed of valve body, valve stem, spring, normally closed solenoid valve and other parts. It is used to control the opening and closing of an oil circuit. When the oil circuit needs to be connected, the electromagnetic is de-energized, the oil circuit of the solenoid valve is closed, the lower part of the valve stem is subjected to the oil pressure and spring force at the spring end, and the upper part is subjected to oil pressure. When there is no leakage, the oil pressure at the upper and lower ends of the valve stem is equal. The valve stem is at the upper end under the action of the spring, and the oil circuit is connected; when the oil circuit needs to be disconnected, the solenoid valve is energized, the oil channel of the solenoid valve is opened, the oil pressure at the spring end leaks oil, the upper part of the valve stem receives oil pressure, and the lower part receives spring force. The force generated by the oil pressure on the valve stem is greater than the spring force, and the valve stem moves downward, and the oil circuit is connected.

[0003] When the oil circuit is in a connected state, when there is a mismatch in the diameter of the small hole, the gap between the valve stem and the valve body, and the eccentricity, the oil pressure on the upper part of the valve stem will be greater than the oil pressure on the lower part plus the spring force, the valve stem will move abnormally, the oil circuit will be cut off, and the connection and cutoff of the oil circuit in the valve body cannot be switched normally. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a novel oil circuit cut-off valve.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides a novel oil circuit shut-off valve, comprising a valve body, wherein a valve stem is fitted in a clearance in the valve body, the valve body is divided into an upper end portion, a shut-off portion and a lower end portion, the shut-off portion is located between the upper end portion and the lower end portion, one side of the shut-off portion is connected to an oil pipe A, and the other side is connected to an oil pipe B, a pressure reducing assembly is arranged on the upper end portion, and a driving member is arranged on the lower end portion.

[0007] Preferably, the pressure reducing assembly includes a solenoid valve and a first oil drain pipe, the upper end is connected with a first connecting pipe, the first connecting pipe is connected with the oil pipe A, the upper end is connected with the first oil drain pipe, and the solenoid valve is arranged between the upper end and the first oil drain pipe.

[0008] Preferably, the driving member is configured as a spring, one end of the spring is connected to the bottom of the lower end portion, and the other end of the spring is connected to the valve stem.

[0009] Preferably, the valve stem includes a connecting portion, an upper truncated end and a lower truncated end, the two ends of the connecting portion are respectively connected to the upper truncated end and the lower truncated end, the upper truncated end and the lower truncated end are both matched with the internal clearance of the valve body, and the cross-sectional diameter length of the connecting portion is smaller than the cross-sectional diameter length of the upper truncated end and the cross-sectional diameter length of the lower truncated end.

[0010] Preferably, a second oil drain pipe is connected to the cut-off portion.

[0011] Preferably, the lower end portion is connected to a third oil drain pipe.

[0012] Preferably, a throttling hole is provided in the first connecting pipe.

[0013] The beneficial effects of the utility model are as follows: when the pressure reducing assembly does not relieve the hydraulic pressure in the upper end portion, the hydraulic pressure at the upper end portion is equal to the driving force of the driving member at the lower end portion, and at this time, the oil pipe A and the oil pipe B are in a connected state; when the pressure reducing assembly relieves the hydraulic pressure in the upper end portion, the hydraulic pressure at the upper end portion is reduced, so that the driving force of the driving member is greater than the hydraulic pressure at the upper end portion, thereby pushing the valve stem to move toward the upper end portion, so that the valve stem blocks the oil pipes A and B, and the oil circuit is cut off; when the pressure reducing assembly no longer reduces the pressure on the upper end portion, the pressure at the upper end portion gradually becomes greater than the driving force at the lower end portion, driving the valve stem to move downward and to a certain equilibrium state, so that the oil pipes A and B are connected, and the oil circuit is connected, which helps to switch the connection and cutoff of the oil circuit in the valve body normally, and avoid abnormal movement of the valve stem as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the electromagnetic valve of the utility model in a power-off state;

[0015] Figure 2 It is a structural schematic diagram of the electromagnetic valve of the utility model in the energized state;

[0016] Explanation of the reference numerals: 1-valve body; 101-upper end; 102-truncation portion; 103-lower end; 2-valve stem; 201-upper truncation end; 202-connecting portion; 203-lower truncation end; 3-oil pipe A; 4-oil pipe B; 5-solenoid valve; 6-first oil drain pipe; 7-spring; 8-second oil drain pipe; 9-third oil drain pipe; 10-throttling hole; 11-first connecting pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In the embodiments of this application, refer to Figure 1 , including a valve body 1, which is divided into an upper end portion 101, a cut-off portion 102 and a lower end portion 103. The cut-off portion 102 is located between the upper end portion 101 and the lower end portion 103. One side of the cut-off portion 102 is connected to an oil pipe A3, and the other side is connected to an oil pipe B4. A second oil drain pipe 8 is connected to the cut-off portion 102, so that the oil pipe A3 and the second oil drain pipe 8 are connected, which is convenient for draining oil from the oil pipe A3 and helps to reduce the oil pressure in the oil pipe A3; a valve stem 2 is fitted in the gap in the valve body 1. When part of the oil flows into the lower end portion 103 along the gap between the valve stem 2 and the valve body 1, the lower end portion 103 is connected to a third oil drain pipe 9, and the third oil drain pipe 9 drains part of the oil.

[0020] Reference Figure 1 The valve stem 2 includes a connecting portion 202, an upper truncated end 201 and a lower truncated end 203. The two ends of the connecting portion 202 are respectively connected to the upper truncated end 201 and the lower truncated end 203. The upper truncated end 201 and the lower truncated end 203 are both matched with the internal clearance of the valve body 1. The cross-sectional diameter length of the connecting portion 202 is smaller than the cross-sectional diameter length of the upper truncated end 201 and the cross-sectional diameter length of the lower truncated end 203. When the connecting portion 202 is located at the connecting position of the oil pipe A3 and the oil pipe B4, the oil pipe A3 and the oil pipe B4 are in a connecting state. When the lower truncated end 203 is located at the connecting position of the oil pipe B4, the lower truncated end 203 blocks the oil pipe B4 to achieve the truncation of the oil pipe A3 and the oil pipe B4.

[0021] Reference Figure 1 A pressure reducing assembly is arranged on the upper end portion 101, and the pressure reducing assembly includes a solenoid valve 5 and a first oil drain pipe 6. The upper end portion 101 is connected with a first connecting pipe 11, and the first connecting pipe 11 is connected with the oil pipe A3. The upper end portion 101 is connected with the first oil drain pipe 6, and a throttling hole 10 is arranged in the first connecting pipe 11. The solenoid valve 5 is arranged between the upper end portion 101 and the first oil drain pipe 6; a driving member is arranged at the lower end portion 103, and the driving member is arranged as a spring 7. One end of the spring 7 is connected to the bottom of the lower end portion 103, and the other end is connected to the valve stem 2.

[0022] Reference Figure 2, the solenoid valve 5 is energized to make the oil pressure of the upper end 101 leak from the first oil drain pipe 6, so that the oil pressure of the upper end 101 is reduced, and the elastic force of the spring 7 gradually becomes greater than the oil pressure of the upper end 101, pushing the valve stem 2 to move toward the upper end 101, and the lower cut-off end 203 blocks the oil pipe B4, thereby cutting off the oil path of the oil pipes A3 and B4; the solenoid valve 5 is de-energized to stop the oil leakage of the upper end 101, thereby gradually increasing the oil pressure of the upper end 101, and at this time the oil pressure is greater than the elastic force of the spring 7, thereby pushing the valve stem 2 to move toward the lower end 103, until the oil pressure of the upper end 101 and the elastic force of the spring 7 are in a balanced state, and the connecting part 202 moves to the connecting part of the oil pipes A3 and B4, thereby realizing the connection between the oil pipes A3 and B4.

[0023] The working principle of this embodiment is as follows: when the electromagnetic valve 5 is powered off so that the upper end portion 101 does not drain oil, the oil pressure of the upper end portion 101 and the elastic force generated by the spring 7 of the lower end portion 103 are in a balanced state, and the connecting portion 202 is located at the connection between the oil pipe A3 and the oil pipe B4. At this time, the oil pipe A3 and the oil pipe B4 are in a connected state; when the electromagnetic valve 5 is powered on, the oil pressure of the upper end portion 101 is drained from the first oil drain pipe 6, so that the oil pressure of the upper end portion 101 is reduced, the oil pressure of the upper end portion 101 is reduced, and the elastic force of the spring 7 in the lower end portion 103 gradually becomes greater than the oil pressure of the upper end portion 101. The pressure makes the elastic force of the spring 7 itself push the valve stem 2 to move toward the upper end 101, and the lower cut-off end 203 blocks the oil pipe B4, thereby realizing the cut-off of the oil pipes A3 and B4; the solenoid valve 5 is placed at the upper end 101 to avoid as much as possible the phenomenon that the hydraulic pressure of the upper end 101 is greater than the elastic force of the spring 7 in the lower end 103 when the oil pipes A and B are in a blocked state, and the oil pipes A and B are kept in a connected state continuously, and abnormal movement of the valve stem 2 is avoided as much as possible, so that the connection and cut-off of the oil circuit in the valve body 1 can be switched normally.

[0024] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A new type of oil circuit cut-off valve, characterized by: The invention comprises a valve body (1), wherein a valve stem (2) is fitted in a clearance inside the valve body (1), wherein the valve body (1) is divided into an upper end portion (101), a cut-off portion (102) and a lower end portion (103), wherein the cut-off portion (102) is located between the upper end portion (101) and the lower end portion (103), wherein one side of the cut-off portion (102) is connected to an oil pipe A (3), and the other side is connected to an oil pipe B (4), wherein a pressure reducing assembly is arranged on the upper end portion (101), and a driving member is arranged on the lower end portion (103).

2. A novel oil circuit cut-off valve as claimed in claim 1, characterized in that: The pressure reducing assembly comprises a solenoid valve (5) and a first oil drain pipe (6); the upper end portion (101) is connected to a first connecting pipe (11), the first connecting pipe (11) is connected to an oil pipe A (3), the upper end portion (101) is connected to the first oil drain pipe (6), and the solenoid valve (5) is arranged between the upper end portion (101) and the first oil drain pipe (6).

3. A novel oil circuit cut-off valve as claimed in claim 1, characterized in that: The driving member is configured as a spring (7), one end of the spring (7) is connected to the bottom of the lower end portion (103), and the other end is connected to the valve stem (2).

4. A novel oil circuit cut-off valve as claimed in claim 1, characterized in that: The valve stem (2) comprises a connecting portion (202), an upper truncated end (201) and a lower truncated end (203); the two ends of the connecting portion (202) are respectively connected to the upper truncated end (201) and the lower truncated end (203); the upper truncated end (201) and the lower truncated end (203) are both clearance-matched with the interior of the valve body (1); and the cross-sectional diameter length of the connecting portion (202) is smaller than the cross-sectional diameter length of the upper truncated end (201) and the cross-sectional diameter length of the lower truncated end (203).

5. A novel oil circuit cut-off valve as claimed in claim 1, characterized in that: The cut-off portion (102) is connected to a second oil drain pipe (8).

6. A novel oil circuit cut-off valve as claimed in claim 1, characterized in that: The lower end portion (103) is connected to a third oil drain pipe (9).

7. A novel oil circuit cut-off valve as claimed in claim 2, characterized in that: A throttling hole (10) is provided in the first connecting pipe (11).

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