A check valve for automatic filtering of hydraulic pump oil

Abstract

The present invention provides a check valve for automatic filtration of hydraulic pump oil, which relates to the technical field of check valves, including: a valve body; the valve body is a cylindrical tubular structure, the top and bottom of the valve body are respectively threadedly connected with a first sealing cover and a second sealing cover, and a flow pipe is welded to the left and right sides of the outer wall of the valve body. In the present application, when the first electric cylinder is damaged, the sealing of the valve body cannot be achieved. At this time, the third electric cylinder can be controlled to contract. When the third electric cylinder contracts, it drives the second filter cover to move downward, and the filter holes on the second filter cover are gradually staggered from the filter holes on the first filter cover. At this time, the size adjustment of the filter holes and emergency sealing are achieved. Compared with the existing device, the present device can not only achieve the size adjustment of the filter holes through the first filter cover and the second filter cover, but also achieve emergency sealing through the position adjustment of the first filter cover and the second filter cover, and the structure is flexible.

Description

Technical Field

[0001] The invention relates to the technical field of check valves, in particular to a check valve for automatic filtering of hydraulic pump oil. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, a one-way valve, a reflux valve or an isolation valve. The disc movement modes are divided into lifting type and swing type. Check valves are widely used. For example, they can be installed on hydraulic pumps to block the hydraulic oil and prevent backflow.

[0003] When the electric cylinder of the valve seal is damaged during use of the existing device, the valve cannot be closed at this time, and emergency sealing can not be achieved through structural improvement by adjusting the size of the filter hole; when cleaning the residue on the filter element of the existing device, it is necessary to use other valves to block the leakage and then clean it, which is cumbersome and increases the cost.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and a check valve for automatic filtering of hydraulic pump oil is provided, in order to achieve a more practical purpose. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a check valve for automatic filtering of hydraulic pump oil, so as to solve the problem that when the electric cylinder of the valve seal is damaged during use, the valve cannot be closed, and the structure is not improved enough to adjust the size of the filter hole to achieve emergency sealing; when cleaning the residue on the filter element of the existing device, it is necessary to use other valves to block the leakage and then clean it, which is cumbersome to operate and increases the cost.

[0006] The present invention provides a check valve for automatic filtering of hydraulic pump oil, which specifically comprises: a valve body; the valve body is a cylindrical tubular structure, a first sealing cover and a second sealing cover are respectively threadedly connected to the top and bottom of the valve body, and a flow pipe is welded to the left and right sides of the outer wall of the valve body.

[0007] Furthermore, a filter assembly is installed on the second sealing cover, and the filter assembly is composed of a first spring rod, a first filter cover, a second filter cover and a filter hole. Two first spring rods are fixed to the top end surface of the second sealing cover, and the upper ends of the two first spring rods are fixed to the top end surface of the inner wall of the first filter cover. The first filter cover slides in the valve body.

[0008] Furthermore, the first filter cover is a cylindrical cover-shaped structure, the outer wall of the first filter cover is in contact with the inner wall of the valve body, and the outer wall of the first filter cover is provided with filter holes in a ring array.

[0009] Furthermore, an adjustment assembly is installed in the valve body, and the adjustment assembly consists of a sealing seat and a first electric cylinder. The sealing seat slides inside the valve body, and the sealing seat is a cylindrical cover-like structure. The outer wall of the sealing seat contacts the inner wall of the valve body, and the sealing seat is located above the first filter cover.

[0010] Furthermore, two first electric cylinders are fixed to the bottom end surface of the inner wall of the sealing seat, and the upper ends of the two first electric cylinders are in contact with the bottom end surface of the first sealing cover.

[0011] Furthermore, an auxiliary component is installed in the first filter cover, and the auxiliary component is composed of a second spring rod and a third electric cylinder. A second filter cover is limitedly slidable in the first filter cover, and the second filter cover is a cylindrical cover-like structure. The outer wall of the second filter cover is in contact with the inner wall of the first filter cover; filter holes are opened in a circular array on the outer wall of the second filter cover, and the filter holes on the second filter cover are aligned with the filter holes on the first filter cover.

[0012] Furthermore, a third electric cylinder is fixed to the top surface of the second sealing cover, and a second spring rod is fixed to the protruding end of the third electric cylinder; the protruding end of the second spring rod is fixed to the top surface of the inner wall of the second filter cover, and the second filter cover slides on the two first spring rods.

[0013] Furthermore, a discharge pipe is welded to the bottom end surface of the outer wall of the left side flow pipe, and a valve is installed on the discharge pipe.

[0014] Furthermore, a slag discharge assembly is installed in the left circulation pipe, and the slag discharge assembly is composed of a retaining ring, a fixed block, a second electric cylinder and a sealing ball. A retaining ring is welded on the inner wall of the left circulation pipe, and a fixed block with a rectangular block structure is welded on the inner wall of the left circulation pipe. A second electric cylinder is fixed on the right end face of the fixed block, and a sealing ball is fixed to the protruding end of the second electric cylinder. The sealing ball is located on the left side of the discharge pipe and on the right side of the retaining ring. When the second electric cylinder contracts, the outer wall of the sealing ball contacts the inner wall of the retaining ring. At this time, the left circulation pipe is in a sealed state.

[0015] Furthermore, the outer walls of the first sealing cover and the second sealing cover are provided with auxiliary grooves in a circular array, the auxiliary grooves are semi-cylindrical groove structures, and the auxiliary grooves provided in the circular array together constitute a hand anti-slip structure when the first sealing cover and the second sealing cover are opened.

[0016] Furthermore, an adjustment block is welded to the top end surface of the first sealing cover and the bottom end surface of the second sealing cover. Both adjustment blocks are hexagonal block structures, and the two adjustment blocks together constitute auxiliary adjustment parts of the first sealing cover and the second sealing cover.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In the present application, through the arrangement of the first filter cover, the second filter cover and the auxiliary components, when the first electric cylinder is damaged, the sealing of the valve body cannot be achieved. At this time, the third electric cylinder can be controlled to contract. When the third electric cylinder contracts, it drives the second filter cover to move downward, and the filter holes on the second filter cover are gradually staggered from the filter holes on the first filter cover. At this time, the size adjustment of the filter holes and emergency sealing are achieved. Compared with the existing device, the present device can achieve the size adjustment of the filter holes through the first filter cover and the second filter cover, and can also achieve emergency sealing through the position adjustment of the first filter cover and the second filter cover, and has a flexible structure.

[0019] In the present application, through the setting of the filter assembly, when cleaning the first filter cover and the second filter cover, it is sufficient to control the two first electric cylinders to extend, and the sealing seat moves downward under the drive of the two first electric cylinders, and the sealing seat pushes the first filter cover to move downward. At this time, the two first spring rods are compressed, and when the outer wall of the sealing seat is completely in contact with the inner sides of the two circulation pipes, the sealing of the two circulation pipes is completed. At this time, the second sealing cover can be rotated to disassemble the first filter cover and the second filter cover. Compared with the existing device, there is no need to separately set a valve to seal the valve main body, and the first filter cover and the second filter cover can be cleaned, which is convenient to clean.

[0020] In the present application, by setting up a residue discharge assembly, the second electric cylinder is controlled to contract until the sealing ball is in close contact with the retaining ring, and the liquid supply pump is controlled to realize oil backflow. At this time, under the impact of the oil, the residue in the filter hole and a flow pipe on the left side will be collected in the discharge pipe. At this time, the residue can be discharged through the discharge pipe. Compared with the existing device, the present device can complete the residue discharge without disassembly, and the cleaning is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0022] In the attached picture:

[0023] Figure 1 It shows an axial structural schematic diagram of a check valve for automatic filtering of hydraulic pump oil according to the present invention;

[0024] Figure 2 The schematic diagram of the axial structure of the partially cut-away check valve for automatic oil filtration of a hydraulic pump according to the present invention is shown;

[0025] Figure 3 It is shown that according to the present invention Figure 2 Schematic diagram of the main structure;

[0026] Figure 4It is shown that according to the present invention Figure 2 A schematic diagram of the axial structure after further sectioning;

[0027] Figure 5 It is shown that according to the present invention Figure 4 A schematic diagram of the enlarged structure at point A;

[0028] Figure 6 A schematic diagram of the axial split structure of the first filter cover and the second filter cover according to the present invention is shown;

[0029] Figure 7 The axial structural schematic diagram of the slag discharge assembly according to the present invention is shown;

[0030] Figure 8 It is shown that according to the present invention Figure 7 Schematic diagram of the adjusted axis view structure.

[0031] Reference numerals list

[0032] 1. Valve body; 101. First sealing cover; 102. Second sealing cover; 103. Auxiliary groove; 104. Adjustment block; 105. Flow pipe; 106. Discharge pipe;

[0033] 2. Filter assembly; 201. first spring rod; 202. first filter cover; 203. second filter cover; 204. filter hole;

[0034] 3. Adjustment assembly; 301. Sealing seat; 302. First electric cylinder;

[0035] 4. Slag discharge assembly; 401. retaining ring; 402. fixing block; 403. second electric cylinder; 404. sealing ball;

[0036] 5. Auxiliary component; 501. Second spring rod; 502. Third electric cylinder. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless the embodiments of the present invention clearly define such meanings.

[0039] The words "first", "second" and similar words used in the embodiments of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "one", "one" or "the" and similar words do not indicate a quantity limitation, but indicate the existence of at least one. Similarly, the words "include" or "comprise" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. In the following description, the spatial and directional terms such as "upper", "lower", "front", "back", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the figures, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connect", "couple", "fix" and "attach" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through an intermediate element or structure, unless otherwise clearly stated in this article.

[0040] Embodiment 1:

[0041] As attached Figure 1 To Attachment Figure 8 As shown:

[0042] The present invention provides a check valve for automatic filtering of hydraulic pump oil, comprising: a valve body 1; the valve body 1 is a cylindrical tubular structure, the top and bottom of the valve body 1 are respectively threadedly connected with a first sealing cover 101 and a second sealing cover 102, and the left side and the right side of the outer wall of the valve body 1 are welded with a flow pipe 105.

[0043] Among them, a filter assembly 2 is installed on the second sealing cover 102, and the filter assembly 2 is composed of a first spring rod 201, a first filter cover 202, a second filter cover 203 and a filter hole 204. Two first spring rods 201 are fixed to the top surface of the second sealing cover 102, and the upper ends of the two first spring rods 201 are fixed to the top surface of the inner wall of the first filter cover 202, and the first filter cover 202 slides in the valve body 1.

[0044] The first filter cover 202 is a cylindrical cover-shaped structure, the outer wall of the first filter cover 202 is in contact with the inner wall of the valve body 1, and the outer wall of the first filter cover 202 is provided with filter holes 204 in a ring array.

[0045] Among them, an adjustment component 3 is installed in the valve body 1, and the adjustment component 3 is composed of a sealing seat 301 and a first electric cylinder 302. The sealing seat 301 slides inside the valve body 1. The sealing seat 301 is a cylindrical cover-like structure. The outer wall of the sealing seat 301 contacts the inner wall of the valve body 1. The sealing seat 301 is located above the first filter cover 202.

[0046] Among them, two first electric cylinders 302 are fixed to the bottom end surface of the inner wall of the sealing seat 301, and the upper ends of the two first electric cylinders 302 are in contact with the bottom end surface of the first sealing cover 101. When sealing the valve body 1, the two first electric cylinders 302 can be controlled to extend, and the sealing seat 301 moves downward under the drive of the two first electric cylinders 302, and the sealing seat 301 pushes the first filter cover 202 to move downward. At this time, the two first spring rods 201 are compressed. When the outer wall of the sealing seat 301 is completely in contact with the inner sides of the two circulation pipes 105, the sealing of the two circulation pipes 105 is completed. During the circulation process, the oil flows from a left circulation pipe 105 to a right circulation pipe 105. When it flows to the first filter cover 202 on the way, double filtration can be performed through the filter holes 204 on the first filter cover 202.

[0047] Among them, an auxiliary component 5 is installed in the first filter cover 202, and the auxiliary component 5 is composed of a second spring rod 501 and a third electric cylinder 502. A second filter cover 203 is limitedly slidable in the first filter cover 202. The second filter cover 203 is a cylindrical cover-like structure, and the outer wall of the second filter cover 203 contacts the inner wall of the first filter cover 202; the outer wall of the second filter cover 203 is provided with filter holes 204 in a circular array, and the filter holes 204 on the second filter cover 203 are aligned with the filter holes 204 on the first filter cover 202.

[0048] Among them, a third electric cylinder 502 is fixed to the top surface of the second sealing cover 102, and a second spring rod 501 is fixed to the protruding end of the third electric cylinder 502; the protruding end of the second spring rod 501 is fixed to the top surface of the inner wall of the second filter cover 203, and the second filter cover 203 slides on the two first spring rods 201. When adjusting the size of the filter hole 204, the third electric cylinder 502 can be controlled to contract. When the third electric cylinder 502 contracts, it drives the second filter cover 203 to move downward, and the filter holes 204 on the second filter cover 203 are gradually staggered with the filter holes 204 on the first filter cover 202. At this time, the size adjustment of the filter holes 204 is realized.

[0049] A discharge pipe 106 is welded to the bottom end surface of the outer wall of the left flow pipe 105 , and a valve is installed on the discharge pipe 106 .

[0050] A slag discharge assembly 4 is installed in a left circulation pipe 105, and the slag discharge assembly 4 is composed of a retaining ring 401, a fixing block 402, a second electric cylinder 403 and a sealing ball 404. A retaining ring 401 is welded on the inner wall of the left circulation pipe 105, and a fixing block 402 with a rectangular block structure is welded on the inner wall of the left circulation pipe 105. A second electric cylinder 403 is fixed to the right end face of the fixing block 402, and a sealing ball 404 is fixed to the protruding end of the second electric cylinder 403. The sealing ball 404 is located at the left side of the discharge pipe 106. The sealing ball 404 4 is located at the right side of the retaining ring 401. When the second electric cylinder 403 contracts, the outer wall of the sealing ball 404 contacts the inner wall of the retaining ring 401. At this time, the left circulation pipe 105 is in a sealed state. When cleaning the residue at the left circulation pipe 105, the second electric cylinder 403 is controlled to contract until the sealing ball 404 is in close contact with the retaining ring 401, and the liquid supply pump is controlled to realize oil backflow. At this time, the residue in the filter hole 204 and the left circulation pipe 105 will be collected in the discharge pipe 106 under the impact of the oil. At this time, the residue can be discharged through the discharge pipe 106.

[0051] Embodiment 2:

[0052] On the basis of the first embodiment, it also includes: auxiliary grooves 103 are provided in a circular array on the outer walls of the first sealing cover 101 and the second sealing cover 102, and the auxiliary grooves 103 are semi-cylindrical groove structures. The auxiliary grooves 103 provided in the circular array together constitute a hand anti-slip structure when the first sealing cover 101 and the second sealing cover 102 are opened. When the first sealing cover 101 and the second sealing cover 102 are opened by hand, the auxiliary grooves 103 can prevent the hands from slipping.

[0053] Embodiment three:

[0054] On the basis of the second embodiment, it also includes: an adjustment block 104 is welded on the top end surface of the first sealing cover 101 and the bottom end surface of the second sealing cover 102, and the two adjustment blocks 104 are both hexagonal block structures. The two adjustment blocks 104 together constitute the auxiliary adjustment parts of the first sealing cover 101 and the second sealing cover 102. When disassembling and installing the first sealing cover 101 and the second sealing cover 102, use a wrench to clamp on the adjustment block 104 and rotate it.

[0055] The specific usage and function of this embodiment are as follows:

[0056] When sealing the valve body 1, the two first electric cylinders 302 are controlled to extend. Driven by the two first electric cylinders 302, the sealing seat 301 moves downward, and the sealing seat 301 pushes the first filter cover 202 to move downward. At this time, the two first spring rods 201 are compressed. When the outer wall of the sealing seat 301 is completely in contact with the inner side of the two circulation pipes 105, the sealing of the two circulation pipes 105 is completed. During the circulation process, the oil flows from the left circulation pipe 105 to the right circulation pipe 105. When it flows to the first filter cover 202 on the way, double filtering can be performed through the filter holes 204 on the first filter cover 202. When adjusting the size of the filter holes 204, , control the third electric cylinder 502 to contract. When the third electric cylinder 502 contracts, it drives the second filter cover 203 to move downward, and the filter holes 204 on the second filter cover 203 are gradually staggered from the filter holes 204 on the first filter cover 202. At this time, the size adjustment of the filter holes 204 is achieved; when cleaning the residue at the left circulation pipe 105, control the second electric cylinder 403 to contract until the sealing ball 404 is in close contact with the retaining ring 401, and control the liquid supply pump to achieve oil backflow. At this time, under the impact of the oil, the residue in the filter hole 204 and the left circulation pipe 105 will be collected in the discharge pipe 106, and the residue can be discharged through the discharge pipe 106. The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure shall be based on the protection scope of the claims.

Claims

1. A check valve for automatic filtration of hydraulic pump oil, include: A valve body (1); the valve body (1) is a cylindrical tubular structure, the top and bottom of the valve body (1) are respectively threadedly connected to a first sealing cover (101) and a second sealing cover (102), and a flow pipe (105) is welded to the left and right sides of the outer wall of the valve body (1); a filter assembly (2) is installed on the second sealing cover (102), characterized in that the filter assembly (2) is composed of a first spring rod (201), a first filter cover (202), a second filter cover (203) and a filter hole (204), two first spring rods (201) are fixed to the top end surface of the second sealing cover (102), the upper ends of the two first spring rods (201) are fixed to the top end surface of the inner wall of the first filter cover (202), and the first filter cover (202) slides in the valve body (1); The first filter cover (202) is a cylindrical cover-shaped structure, the outer wall of the first filter cover (202) is in contact with the inner wall of the valve body (1), and the outer wall of the first filter cover (202) is provided with filter holes (204) in the shape of an annular array; An adjustment assembly (3) is installed in the valve body (1), the adjustment assembly (3) is composed of a sealing seat (301) and a first electric cylinder (302), the sealing seat (301) slides inside the valve body (1), the sealing seat (301) is a cylindrical cover-shaped structure, the outer wall of the sealing seat (301) contacts the inner wall of the valve body (1), and the sealing seat (301) is located above the first filter cover (202); Two first electric cylinders (302) are fixed to the bottom end surface of the inner wall of the sealing seat (301), and the upper ends of the two first electric cylinders (302) are in contact with the bottom end surface of the first sealing cover (101); An auxiliary component (5) is installed in the first filter cover (202), the auxiliary component (5) is composed of a second spring rod (501) and a third electric cylinder (502), a second filter cover (203) is limitedly slidable in the first filter cover (202), the second filter cover (203) is a cylindrical cover-shaped structure, the outer wall of the second filter cover (203) is in contact with the inner wall of the first filter cover (202); the outer wall of the second filter cover (203) is provided with filter holes (204) in the shape of a ring array, and the filter holes (204) on the second filter cover (203) are aligned with the filter holes (204) on the first filter cover (202); A third electric cylinder (502) is fixed to the top end surface of the second sealing cover (102), and a second spring rod (501) is fixed to the extended end of the third electric cylinder (502); the extended end of the second spring rod (501) is fixed to the top end surface of the inner wall of the second filter cover (203), and the second filter cover (203) slides on the two first spring rods (201).

2. A check valve for automatic filtering of hydraulic pump oil as claimed in claim 1, Features: A discharge pipe (106) is welded to the bottom end surface of the outer wall of the left flow pipe (105), and a valve is installed on the discharge pipe (106).

3. A check valve for automatic filtering of hydraulic pump oil as claimed in claim 2, Features: A slag discharge assembly (4) is installed in the left circulation pipe (105), and the slag discharge assembly (4) is composed of a retaining ring (401), a fixing block (402), a second electric cylinder (403) and a sealing ball (404). A retaining ring (401) is welded on the inner wall of the left circulation pipe (105), and a fixing block (402) with a rectangular block structure is welded on the inner wall of the left circulation pipe (105). A second electric cylinder (403) is fixed to the right end face of the fixing block (402), and a sealing ball (404) is fixed to the protruding end of the second electric cylinder (403). The sealing ball (404) is located on the left side of the discharge pipe (106) and on the right side of the retaining ring (401). When the second electric cylinder (403) contracts, the outer wall of the sealing ball (404) contacts the inner wall of the retaining ring (401), and at this time, the left circulation pipe (105) is in a sealed state.

4. A check valve for automatic filtering of hydraulic pump oil as claimed in claim 3, Features: The first sealing cover (101) and the second sealing cover (102) are both provided with auxiliary grooves (103) in the form of an annular array on their outer walls. The auxiliary grooves (103) are semi-cylindrical groove-shaped structures. The auxiliary grooves (103) provided in the annular array together form a hand anti-slip structure when the first sealing cover (101) and the second sealing cover (102) are opened.

5. A check valve for automatic filtering of hydraulic pump oil as claimed in claim 4, Features: An adjustment block (104) is welded to the top end surface of the first sealing cover (101) and the bottom end surface of the second sealing cover (102); both adjustment blocks (104) are hexagonal block structures; the two adjustment blocks (104) together constitute auxiliary adjustment parts of the first sealing cover (101) and the second sealing cover (102).

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