A hydraulic differential one-way on-off valve for thermal printer assembly

Abstract

The present invention belongs to the technical field of one-way valves, and in particular relates to a hydraulic differential one-way on-off valve for assembling a thermal printer, comprising: a valve seat one and a valve seat two, wherein the valve seat one is fixedly mounted on one side of the valve seat two, an anti-deflection groove is provided in the valve seat two, and the valve seat one is communicated with the anti-deflection groove; an end cover, wherein the end cover is fixedly mounted in the valve seat one, and an end column is fixedly mounted on one side of the end cover, a valve core cover is provided on one side of the end column and located in the valve seat one, and a valve core is fixedly mounted on one side of the valve core cover. The present invention ensures that the overall device will not rely on the pressure difference at both ends of the valve body, but only depends on whether the liquid pressure P1 in the feed pipe and the valve seat one exists, that is, when P1 exists, the valve core in the valve seat two is a passage, and the liquid in the feed pipe enters the discharge pipe through the valve core through hole, and when P1 is less than a certain value or is 0, the valve core in the valve seat two is disconnected to prevent the liquid in the discharge pipe from flowing back, and at the same time, the overall device can be installed horizontally or vertically, and does not require regular maintenance.

Description

Technical Field

[0001] The invention belongs to the technical field of one-way valves, and in particular relates to a hydraulic differential one-way on-off valve for assembling a thermal printer. Background Art

[0002] During the production and assembly process of thermal printers, the on-off valve needs to be used to realize the on-off function to realize the switching of assembly actions. In the existing liquid transportation pipeline with pressure difference, the liquid pressure in the feed pipe and the valve seat is P1, and the liquid pressure in the discharge pipe is P2. That is, P1>P2, when P1>P2 is established, the liquid flows from the P1 end to the P2 end and works normally; when P1 decreases or is 0, P2 remains unchanged, and there is an abnormality that the liquid flow direction is reversed and does not conform to the normal flow direction. The existing technology generally installs a one-way valve (spring mechanical type) in the pipeline to prevent backflow operation. The disadvantages are large fluid resistance, limited adaptability to certain fluids, regular maintenance, and most of them can only be installed horizontally. In view of this, we propose a hydraulic differential one-way on-off valve for thermal printer assembly. Summary of the invention

[0003] The object of the present invention is to provide a hydraulic differential one-way on-off valve for thermal printer assembly to solve the problems raised in the above background technology.

[0004] In view of this, the present invention provides a hydraulic differential one-way on-off valve for thermal printer assembly, comprising:

[0005] A valve seat 1 and a valve seat 2, wherein the valve seat 1 is fixedly mounted on one side of the valve seat 2, an anti-deflection groove is provided in the valve seat 2, and the valve seat 1 is communicated with the anti-deflection groove;

[0006] An end cover, wherein the end cover is fixedly installed in a valve seat, and an end column is fixedly installed on one side of the end cover, a valve core cover is provided on one side of the end column and is located in the valve seat, a valve core is fixedly installed on one side of the valve core cover, and one end of the valve core extends into the anti-deflection groove and is fixedly installed with a valve core column, and a valve core through hole is opened on the valve core;

[0007] An elastic component is sleeved on the valve core column and is used to squeeze the valve core to reset;

[0008] The feed pipe and the discharge pipe are respectively fixedly installed on the upper and lower sides of the valve seat 2, and a bypass pipe fixed to the valve seat 1 is fixedly installed on one side of the feed pipe.

[0009] In the above technical solution, further, the elastic component includes:

[0010] The valve core reset spring is sleeved on the valve core column, and the inner diameter of the valve core reset spring is larger than the diameter of the valve core column, and the diameter of the valve core reset spring is smaller than the diameter of the valve core.

[0011] In the present technical scheme, the structural stability of the valve core return spring is ensured. When the valve core return spring is in a naturally extended state, the valve core will block and seal the tail end of the feed pipe. When the feed pipe enters the liquid, the liquid in the feed pipe will enter the valve seat one through the bypass pipe and be located between the end cover and the valve core cover. Under the pressure of the liquid, the valve core cover is moved away from the end column in the valve seat one, and the valve core cover drives the valve core to squeeze the valve core return spring on the valve core column to contract. When the valve core return spring contracts, it will generate elastic force until the valve core through-hole is connected with the feed pipe and the discharge pipe, and the liquid in the feed pipe directly enters the discharge pipe through the valve core through-hole; when the liquid pressure in the valve seat one is less than the elastic force of the valve core return spring or the liquid pressure in the valve seat one is 0, the valve core return spring will immediately rebound and extend and squeeze the valve core cover, valve core, valve core column and valve core through-hole toward the end column until they return to their original position, which can immediately prevent the liquid in the discharge pipe from flowing back.

[0012] In the above technical solution, further, the valve seat 1, valve seat 2, feed pipe, discharge pipe and bypass pipe are an integrally formed structure.

[0013] In this technical solution, the structural stability of valve seat 1, valve seat 2, feed pipe, discharge pipe and bypass pipe is ensured.

[0014] In the above technical solution, further, the tail end and the end column of the bypass pipe are both located between the end cover and the valve core cover, and the length of the end column is greater than the diameter of the tail end of the bypass pipe.

[0015] In this technical solution, the end column can prevent the end cover and the valve core cover from contacting each other, thereby avoiding affecting the discharge of the material at the tail end of the bypass pipe, and also ensuring that the liquid flowing out of the tail end of the bypass pipe is located between the end cover and the valve core cover, so that the liquid can squeeze the valve core cover to move.

[0016] In the above technical solution, further, the valve seat 2, the feed pipe and the discharge pipe are connected.

[0017] In the present technical solution, when the valve core through hole is ensured to be located in the middle of the feed pipe and the discharge pipe, the liquid in the feed pipe can enter the discharge pipe through the valve core through hole.

[0018] In the above technical solution, further, the feed pipe, bypass pipe and valve seat are connected to each other.

[0019] In this technical solution, it is ensured that the liquid in the feed pipe can enter the valve seat 1 through the bypass pipe.

[0020] In the above technical solution, further, the valve core cover, valve core and valve core column are an integrally formed structure, and the diameters of the end cover and the valve core cover are equal to the inner diameter of the valve seat.

[0021] In this technical solution, the structural stability of the valve core cover, valve core and valve core column is ensured to prevent the existence of a gap between the end cover and the valve core cover and the valve seat, thereby preventing liquid from penetrating.

[0022] In the above technical solution, further, the diameter of the valve core through hole is smaller than the inner diameter of the feed pipe and the discharge pipe.

[0023] In this technical solution, it is ensured that the liquid in the feed pipe can smoothly enter the discharge pipe.

[0024] In the above technical solution, further, the inner diameters of the feed pipe and the discharge pipe are equal.

[0025] In this technical solution, the liquid in the feed pipe can enter the discharge pipe normally.

[0026] In the above technical solution, further, the cross-sectional dimensions of the valve core and the anti-deflection groove are equal.

[0027] In this technical solution, it is ensured that the valve core can prevent deflection in the anti-deflection groove, and at the same time, liquid is prevented from penetrating into the gap between the valve core and the anti-deflection groove, thereby avoiding corrosion to the valve core return spring.

[0028] The beneficial effects of the present invention are:

[0029] For this hydraulic differential one-way on-off valve, when the liquid pressure in the feed pipe and the valve seat is P1, and the liquid pressure P1 in the valve seat is less than the elastic force of the elastic component or the liquid pressure P1 in the valve seat is 0, the elastic component immediately rebounds and stretches and squeezes the valve core cover, the valve core, the valve core column and the valve core through hole to move toward the end column until the original position is restored. At the same time, the pressure of the liquid in the discharge pipe is P2. At this time, even if the pressure P2 of the liquid in the discharge pipe is greater than the liquid pressure P1 in the feed pipe or the valve seat, it can prevent the liquid in the discharge pipe from flowing back. When the fluid resistance in the discharge pipe is large, it can also ensure that the overall device will not rely on the pressure difference at both ends of the valve body, but only depends on whether P1 exists. That is, when P1 exists, the valve core in the valve seat 2 is a passage, and the liquid in the feed pipe enters the discharge pipe through the valve core through the hole. When P1 is less than a certain value or is 0, the valve core in the valve seat 2 is disconnected to prevent the liquid in the discharge pipe from flowing back. At the same time, the overall device can be installed horizontally or vertically, and no regular maintenance is required, so it can be used in the assembly process of the thermal printer to realize the switching control of the assembly action. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is one of the schematic diagrams of the detailed internal structure of the valve seat 1, valve seat 2, feed pipe, discharge pipe and bypass pipe in the present invention;

[0032] Figure 3 This is the second schematic diagram of the internal detailed structure of the valve seat 1, valve seat 2, feed pipe, discharge pipe and bypass pipe in the present invention;

[0033] Figure 4 It is a schematic cross-sectional structural diagram of the valve core in the present invention;

[0034] Figure 5 The cross-sectional structure diagram of the combination of valve seat 1, valve seat 2, feed pipe, discharge pipe and bypass pipe in the present invention.

[0035] The symbols in the figure are:

[0036] 1. Valve seat 1; 11. End cover; 12. End column; 2. Valve seat 2; 21. Anti-deflection groove; 3. Feed pipe; 4. Discharge pipe; 5. Bypass pipe; 6. Valve core cover; 61. Valve core; 62. Valve core column; 63. Valve core through hole; 7. Valve core return spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0038] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0040] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0041] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples. Embodiment 1:

[0042] See also Figure 1-Figure 5 As shown, this embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly, comprising:

[0043] Valve seat 1 and valve seat 2, valve seat 1 is fixedly installed on one side of valve seat 2, an anti-deflection groove 21 is opened in valve seat 2, and valve seat 1 is communicated with anti-deflection groove 21;

[0044] An end cover 11 is fixedly installed in the valve seat 1, and an end column 12 is fixedly installed on one side of the end cover 11, a valve core cover 6 is provided on one side of the end column 12 and is located in the valve seat 1, a valve core 61 is fixedly installed on one side of the valve core cover 6, and one end of the valve core 61 extends into the anti-deflection groove 21 and is fixedly installed with a valve core column 62, and a valve core through hole 63 is opened on the valve core 61;

[0045] An elastic component, which is sleeved on the valve core column 62 and is used to squeeze the valve core 61 to reset;

[0046] The feed pipe 3 and the discharge pipe 4 are fixedly installed on the upper and lower sides of the valve seat 2 respectively, and a bypass pipe 5 fixed to the valve seat 1 is fixedly installed on one side of the feed pipe 3.

[0047] It can be seen from the present embodiment that when liquid enters the feed pipe 3, since the valve core 61 blocks and seals the tail end of the feed pipe 3, the liquid in the feed pipe 3 cannot directly enter the discharge pipe 4 through the valve seat 22. At the same time, the liquid in the feed pipe 3 will enter the valve seat 1 through the bypass pipe 5 and be located between the end cover 11 and the valve core cover 6. Subsequently, when the pressure of the liquid entering the valve seat 1 is P1, at this time, the liquid in the valve seat 1 will squeeze the valve core cover 6 away from the end column 12 in the valve seat 1, and make the valve core cover 6 drive the valve core 61 to squeeze the elastic component on the valve core column 62 to contract, and when the elastic component contracts, it will generate elastic force until the valve core through hole 63 is connected to the feed pipe 3 and the discharge pipe 4, and the liquid in the feed pipe 3 directly enters the discharge pipe 4 through the valve core through hole 63; when the liquid pressure in the feed pipe 3 and the valve seat 1 is P1, and the liquid pressure P1 in the valve seat 1 is less than the elastic force of the elastic component or When the liquid pressure P1 in the valve seat 1 is 0, the elastic component immediately rebounds and stretches and squeezes the valve core cover 6, the valve core 61, the valve core column 62 and the valve core through hole 63 to move toward the end column 12 until it returns to its original position. At the same time, the pressure of the liquid in the discharge pipe 4 is P2. At this time, even if the pressure P2 of the liquid in the discharge pipe 4 is greater than the liquid pressure P1 in the feed pipe 3 or the valve seat 1, the backflow of the liquid in the discharge pipe 4 can be prevented. When the fluid resistance in the discharge pipe 4 is large, it can also ensure that the overall device will not rely on the pressure difference at both ends of the valve body, but only depends on whether P1 exists. That is, when P1 exists, the valve core 61 in the valve seat 2 is a passage, and the liquid in the feed pipe 3 enters the discharge pipe 4 through the valve core through hole 63. When P1 is less than a certain value or is 0, the valve core 61 in the valve seat 2 is disconnected to prevent the backflow of the liquid in the discharge pipe 4. At the same time, the overall device can be installed horizontally or vertically, and no regular maintenance is required. Embodiment 2:

[0048] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features. The elastic component includes:

[0049] The valve core reset spring 7 is sleeved on the valve core column 62 , and the inner diameter of the valve core reset spring 7 is larger than the diameter of the valve core column 62 , and the diameter of the valve core reset spring 7 is smaller than the diameter of the valve core 61 .

[0050] It can be seen from the present embodiment that the structure of the valve core reset spring 7 is ensured to be stable. When the valve core reset spring 7 is in a naturally extended state, the valve core 61 will block and seal the tail end of the feed pipe 3. When the feed pipe 3 enters the liquid, the liquid in the feed pipe 3 will enter the valve seat 1 through the bypass pipe 5 and be located between the end cover 11 and the valve core cover 6. Under the pressure of the liquid, the valve core cover 6 is moved away from the end column 12 in the valve seat 1, and the valve core cover 6 drives the valve core 61 to squeeze the valve core reset spring 7 on the valve core column 62 to contract, and the valve core reset spring 61 is pressed against the valve core column 62. When the spring 7 contracts, it will generate elastic force until the valve core through hole 63 is connected with the feed pipe 3 and the discharge pipe 4, and the liquid in the feed pipe 3 directly enters the discharge pipe 4 through the valve core through hole 63; when the liquid pressure in the valve seat 1 is less than the elastic force of the valve core reset spring 7 or the liquid pressure in the valve seat 1 is 0, the valve core reset spring 7 will immediately rebound and stretch and squeeze the valve core cover 6, valve core 61, valve core column 62 and valve core through hole 63 to move toward the end column 12 until they return to their original position, which can immediately prevent the liquid in the discharge pipe 4 from flowing back. Embodiment 3:

[0051] The present embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: valve seat 1, valve seat 2, feed pipe 3, discharge pipe 4 and bypass pipe 5 are an integrally formed structure.

[0052] It can be seen from this embodiment that the structures of valve seat 1, valve seat 2, feed pipe 3, discharge pipe 4 and bypass pipe 5 are ensured to be stable. Embodiment 4:

[0053] The present embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the tail end of the bypass pipe 5 and the end column 12 are both located between the end cover 11 and the valve core cover 6, and the length of the end column 12 is greater than the tail end diameter of the bypass pipe 5.

[0054] It can be seen from this embodiment that the end column 12 can prevent the end cover 11 and the valve core cover 6 from contacting each other, thereby avoiding affecting the discharge of the material at the tail end of the bypass pipe 5, and also ensuring that the liquid flowing out of the tail end of the bypass pipe 5 is located between the end cover 11 and the valve core cover 6, so that the liquid can squeeze the valve core cover 6 to move. Embodiment 5:

[0055] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features: the valve seat 2, the feed pipe 3 and the discharge pipe 4 are connected.

[0056] It can be seen from this embodiment that when the valve core through hole 63 is ensured to be located exactly in the middle of the feed pipe 3 and the discharge pipe 4 , the liquid in the feed pipe 3 can enter the discharge pipe 4 through the valve core through hole 63 . Embodiment 6:

[0057] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features: the feed pipe 3, the bypass pipe 5 and the valve seat 1 are connected.

[0058] It can be seen from this embodiment that it is ensured that the liquid in the feed pipe 3 can enter the valve seat 1 through the bypass pipe 5. Embodiment 7:

[0059] The present embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above-mentioned embodiments, it also has the following technical features: the valve core cover 6, the valve core 61 and the valve core column 62 are an integrally formed structure, and the diameters of the end cover 11 and the valve core cover 6 are equal to the inner diameter of the valve seat 1.

[0060] It can be seen from this embodiment that the structures of the valve core cover 6, the valve core 61 and the valve core column 62 are ensured to be stable, and a gap is prevented between the end cover 11 and the valve core cover 6 and the valve seat 1, thereby preventing liquid from penetrating. Embodiment 8:

[0061] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features: the diameter of the valve core through hole 63 is smaller than the inner diameter of the feed pipe 3 and the discharge pipe 4.

[0062] It can be seen from this embodiment that the liquid in the feed pipe 3 is guaranteed to smoothly enter the discharge pipe 4 . Embodiment 9:

[0063] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features: the inner diameters of the feed pipe 3 and the discharge pipe 4 are equal.

[0064] It can be seen from this embodiment that the liquid in the feed pipe 3 can enter the discharge pipe 4 normally. Embodiment 10:

[0065] This embodiment provides a hydraulic differential one-way on-off valve for thermal printer assembly. In addition to the technical solutions of the above embodiments, it also has the following technical features: the cross-sectional dimensions of the valve core 61 are equal to those of the anti-deflection groove 21.

[0066] It can be seen from this embodiment that the valve core 61 is prevented from deflecting in the anti-deflection groove 21 , and at the same time, liquid is prevented from penetrating into the gap between the valve core 61 and the anti-deflection groove 21 , thereby avoiding corrosion to the valve core return spring 7 .

[0067] Working principle: When liquid enters the feed pipe 3, the valve core 61 blocks and seals the tail end of the feed pipe 3, so the liquid in the feed pipe 3 cannot directly enter the discharge pipe 4 through the valve seat 2. At the same time, the liquid in the feed pipe 3 will enter the valve seat 1 through the bypass pipe 5 and be located between the end cover 11 and the valve core cover 6. Then, when the pressure of the liquid entering the valve seat 1 is P1, the liquid in the valve seat 1 will squeeze the valve core cover 6 away from the valve seat 1. The valve core cover 6 drives the valve core 61 to squeeze the valve core return spring 7 on the valve core column 62 to contract, and the valve core return spring 7 will generate elastic force when it contracts, until the valve core through hole 63 is connected with the feed pipe 3 and the discharge pipe 4, and the liquid in the feed pipe 3 directly enters the discharge pipe 4 through the valve core through hole 63; when the liquid pressure in the feed pipe 3 and the valve seat 1 is P1, and the liquid pressure P1 in the valve seat 1 is less than the elastic force of the valve core return spring 7, Or when the liquid pressure P1 in the valve seat 1 is 0, the valve core reset spring 7 immediately rebounds and stretches and squeezes the valve core cover 6, the valve core 61, the valve core column 62 and the valve core through hole 63 to move toward the end column 12 until it returns to its original position. At the same time, the pressure of the liquid in the discharge pipe 4 is P2. At this time, even if the pressure P2 of the liquid in the discharge pipe 4 is greater than the liquid pressure P1 in the feed pipe 3 or the valve seat 1, the backflow of the liquid in the discharge pipe 4 can be prevented. When the fluid resistance in the discharge pipe 4 is large, it can also ensure that the overall device does not rely on the pressure difference at both ends of the valve body, but only depends on whether P1 exists. That is, when P1 exists, the valve core 61 in the valve seat 2 is a passage, and the liquid in the feed pipe 3 enters the discharge pipe 4 through the valve core through hole 63. When P1 is less than a certain value or is 0, the valve core 61 in the valve seat 2 is disconnected to prevent the backflow of the liquid in the discharge pipe 4. At the same time, the overall device can be installed horizontally or vertically, and no regular maintenance is required.

[0068] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A hydraulic differential one-way on-off valve for thermal printer assembly, characterized in that: include: Valve seat one (1) and valve seat two (2), wherein the valve seat one (1) is fixedly mounted on one side of the valve seat two (2), an anti-deflection groove (21) is provided in the valve seat two (2), and the valve seat one (1) is in communication with the anti-deflection groove (21); An end cover (11), wherein the end cover (11) is fixedly mounted in the valve seat (1), and an end column (12) is fixedly mounted on one side of the end cover (11), a valve core cover (6) is provided on one side of the end column (12) and is located in the valve seat (1), a valve core (61) is fixedly mounted on one side of the valve core cover (6), and one end of the valve core (61) extends into the anti-deflection groove (21) and is fixedly mounted with a valve core column (62), and a valve core through hole (63) is provided on the valve core (61); An elastic component, the elastic component is sleeved on the valve core column (62) and is used to squeeze the valve core (61) to reset; A feed pipe (3) and a discharge pipe (4), wherein the feed pipe (3) and the discharge pipe (4) are respectively fixedly mounted on the upper and lower sides of the second valve seat (2), and a bypass pipe (5) fixed to the first valve seat (1) is fixedly mounted on one side of the feed pipe (3); The elastic component comprises: A valve core return spring (7), wherein the valve core return spring (7) is sleeved on the valve core column (62), and the inner diameter of the valve core return spring (7) is larger than the diameter of the valve core column (62), and the diameter of the valve core return spring (7) is smaller than the diameter of the valve core (61); The valve seat 1 (1), the valve seat 2 (2), the feed pipe (3), the discharge pipe (4) and the bypass pipe (5) are an integrally formed structure; The tail end of the bypass pipe (5) and the end column (12) are both located between the end cover (11) and the valve core cover (6), and the length of the end column (12) is greater than the diameter of the tail end of the bypass pipe (5); The second valve seat (2), the feed pipe (3) and the discharge pipe (4) are connected; The feed pipe (3), the bypass pipe (5) and the valve seat 1 (1) are connected.

2. The hydraulic differential one-way on-off valve according to claim 1, characterized in that: The valve core cover (6), the valve core (61) and the valve core column (62) are an integrally formed structure, and the diameters of the end cover (11) and the valve core cover (6) are equal to the inner diameter of the valve seat (1).

3. The hydraulic differential one-way on-off valve according to claim 1, characterized in that: The diameter of the valve core through hole (63) is smaller than the inner diameters of the feed pipe (3) and the discharge pipe (4).

4. The hydraulic differential one-way on-off valve according to claim 1, characterized in that: The inner diameters of the feed pipe (3) and the discharge pipe (4) are equal.

5. The hydraulic differential one-way on-off valve according to claim 1, characterized in that: The cross-sectional dimensions of the valve core (61) and the anti-deflection groove (21) are equal.

Images