Multi-inlet one-way valve structure and diesel engine cooling system and method

Abstract

The invention discloses a multi-inlet one-way valve structure and a diesel engine cooling system and method, solves the problem that in the prior art, a one-way valve structure only has one inlet and one outlet, and has the beneficial effects that switching of different pipelines can be achieved through the arrangement of multiple inlets, the occupied space is small, and installation is convenient. According to the specific scheme, the multi-inlet one-way valve structure comprises a valve body, the valve body is provided with at least two inlets, an angle is set between every two adjacent inlets, the valve body is provided with an outlet, each inlet is fixedly connected with a connecting flange, and the connecting flanges are connected with a valve block support in a clamped mode. The valve plate is rotationally installed at the valve plate support through a pin shaft so that the valve plate can be opened towards the inner side of the valve body relative to the valve plate support, the valve plate support is an annular piece, and a step is arranged on the inner annular face of the valve plate support so that the valve plate can be positioned when the inlet is closed.

Description

Technical Field

[0001] The invention relates to the technical field of one-way valves, in particular to a multi-inlet one-way valve structure, a diesel engine cooling system and a method. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] One-way valves are widely used and are basically installed in all petrochemical pipelines. One-way valves are generally standard and universal parts, but universal parts are not necessarily suitable for some occasions, such as the three-way one-way valve on a marine diesel engine. According to the requirements, the diesel engine cooling water pump requires one main and one backup, that is, one main water pump and one backup water pump to cope with the emergency of the main water pump failure, and a one-way valve is installed behind the pump to prevent backflow when the water pump stops working. The current solution generally uses two water pumps, and each pipeline behind the pump is equipped with an inlet and an outlet one-way valve, which are connected to the main engine cooling water inlet after being merged through a three-way.

[0004] The above-mentioned problem also exists in other fields, that is, the main pump and the backup pump are connected to the equipment through two pipelines respectively, which takes up a large space, and the installation space of many equipment is limited. If multiple pipelines are set externally, the layout of the pipelines needs to occupy a large space. At present, all one-way valves are one-inlet and one-outlet. For application scenarios that require one main and one backup, only one one-inlet and one-outlet one-way valve can be installed on each of the two inlet pipes, and then connected to one outlet through a tee. Not only does it have the problem of occupying a large space, but also the problem of complex pipeline design and increased pipeline cost.

[0005] In addition, some pipelines require more inlets, and the existing configuration of one inlet and one outlet obviously cannot meet the demand; and the existing one-way valves are usually designed individually and have poor versatility.

[0006] The setting method of a main pump and a backup pump often requires the equipment to be shut down when a problem occurs with the main pump, and then restarted and the backup pump is used, which affects the normal operation of the equipment. Summary of the invention

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a multi-inlet one-way valve structure having the characteristics of simple structure, convenient installation, reliable use, and small space occupation.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0009] A multi-inlet one-way valve structure includes a valve body, which is provided with at least two inlets. The valve body is provided with an outlet at a set angle between two adjacent inlets. A connecting flange is fixed at each inlet, and the connecting flange is snap-connected to a valve plate bracket. The valve plate is rotatably mounted on the valve plate bracket through a pin shaft so that the valve plate can be opened toward the inside of the valve body relative to the valve plate bracket. The valve plate bracket is an annular part, and a step is provided on the inner annular surface of the valve plate bracket to position the valve plate when closing the inlet.

[0010] In a multi-inlet one-way valve structure as described above, the valve body is provided with two inlets, the central axes of the two inlets are vertically connected, the opening directions of the valve plates at the two inlets are both opened toward the outlet direction, and when the outlet direction is upward, when the medium pressure in the pipeline connected to the corresponding inlet decreases, the valve plate is automatically closed under the action of gravity and the pressure difference on both sides thereof.

[0011] In a multi-inlet one-way valve structure as described above, the valve body is provided with three inlets, two of which are arranged opposite to each other, and the other inlet is arranged opposite to the outlet, and the opening directions of the valve plates at the three inlets are all opened toward the outlet direction. When the outlet direction is set upward, the opening direction of the valve plate is all set upward to facilitate the rapid return of the valve plate.

[0012] In a multi-inlet one-way valve structure as described above, the valve plate includes a valve plate body, the shape of the valve plate body is the same as the shape of the hollow part of the valve plate bracket, a connecting piece is arranged on one side of the valve plate body, the connecting piece is in the shape of a long strip, and a pin hole is opened along the length direction of the connecting piece.

[0013] In the multi-inlet one-way valve structure as described above, an open groove is provided on the side of the valve plate body facing the valve body, the open groove is provided close to the connecting piece, and the width of the open groove is smaller than the radius of the valve plate body.

[0014] In the multi-inlet one-way valve structure as described above, the inner annular surface of the valve plate support is trumpet-shaped on the side of the step facing the inner end surface of the valve plate support, and a pressure relief hole is arranged on the trumpet-shaped side of the inner annular surface of the valve plate support.

[0015] In the multi-inlet one-way valve structure as described above, the distance between the step and the inner end surface of the valve plate support is greater than the distance between the step and the outer end surface of the valve plate support.

[0016] In a multi-inlet one-way valve structure as described above, the valve plate bracket includes a bracket body, a recess is provided on one side of the bracket body, the recess is used to accommodate the connecting piece of the valve plate, and the valve plate body is provided with a connecting hole communicating with the recess, and the connecting hole can be communicated with the pin hole of the valve plate.

[0017] In the multi-inlet one-way valve structure as described above, one end of the connecting flange is snap-connected to the valve body, and a sealing member is fixed to the other end of the connecting flange, and the inner diameter of the sealing member is larger than the outer diameter of the valve plate bracket.

[0018] In the second aspect, the present invention also provides a diesel engine cooling system, including the above-mentioned multi-inlet one-way valve structure, each inlet is connected to a pipeline, a pressure sensor is provided at the pipeline, the pressure sensor is connected to a controller, a control switch is provided at each pipeline, and the controller is connected to the control switch. In this way, the pressure sensor at the corresponding pipeline detects the pressure in the pipeline and sends it to the controller. When the controller calculates that the pressure reduction value in the pipeline is large, it can control the control switch of another pipeline to open, so that the water supply of the cooling system can be guaranteed without shutting down.

[0019] In a third aspect, the present invention further provides a working method of a multi-inlet one-way valve structure, including the following contents:

[0020] The valve body is provided with at least two inlets, and the valve body is also provided with an outlet;

[0021] Install the valve disc through the valve disc bracket, fix the valve disc bracket with the valve disc to the connecting flange, and fix the connecting flange to the inlet of the valve body;

[0022] The inlets of the valve body are connected to the corresponding pipelines respectively. During normal operation, only one valve plate at the inlet rotates to the inside of the valve body and is in an open state. When switching is required, the medium pressure in the pipeline decreases, and the corresponding valve plate closes to prevent the medium from flowing back. The medium pressure in the other pipeline increases, and the valve plate at the corresponding inlet opens to complete the pipeline switching.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1) The one-way valve structure in the present invention includes a valve body, which is provided with at least two inlets and an outlet. A connecting flange is provided at the inlet, and a valve plate bracket is installed through the connecting flange. The valve plate is installed through the valve plate bracket. In this way, under normal conditions, one valve plate is open relative to the valve plate bracket, and the working medium enters the valve body through the inlet and is discharged from the outlet. When the pressure of the working medium at the inlet is reduced, the working medium can enter the valve body through another inlet. In this way, the pipeline design is simplified, and the overall pipeline is relatively more convenient to arrange and will not occupy a large space. In addition, two or more inlets can be provided to meet different usage requirements.

[0025] 2) The present invention integrates multiple one-way valve plates and multi-channel pipelines to form a one-way valve structure with multiple inlets and one outlet, which can simplify pipeline design and facilitate installation and maintenance. It is suitable for use scenarios such as cooling water, fuel, and lubricating oil that require multiple inlet one-way pipelines. It is also applicable to chemical pipelines that require two-inlet and one-outlet one-way valves. The overall pipeline structure can be simplified and installation and use are convenient. At the same time, connecting flanges can be used for installation to achieve standardized design and ensure versatility.

[0026] 3) The opening direction of the one-way valve in the present invention is toward the inside of the valve body. When the outlet is facing upward, the opening direction of the valve plate is set toward the outlet direction. In this way, when the valve plate at the inlet needs to be closed, the valve plate can be quickly closed under the action of gravity and the pressure difference between the two places; of course, when the one-way valve structure is set horizontally, each valve plate is mainly closed under the action of pressure difference.

[0027] 4) In the present invention, a step is provided on the valve plate bracket to effectively limit the position of the valve plate when it is closed. The valve plate bracket can be snap-connected with the connecting flange and connected by a positioning pin to ensure that the valve plate bracket is stably installed at the connecting flange.

[0028] 5) In the system provided by the present invention, pressure sensors are provided, and the pressure sensors are respectively connected to the controller. When the pressure in the corresponding pipeline decreases, the controller can control the switch of another pipeline to open, so that oil or water can be supplied to the equipment without stopping, thereby meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0030] Figure 1 It is a front view of a multi-inlet one-way valve structure in embodiment 1 of the present invention.

[0031] Figure 2 It is a front view of a valve plate in a multi-inlet one-way valve structure in Example 1 of the present invention.

[0032] Figure 3 The present invention Figure 2 Schematic diagram of the AA section.

[0033] Figure 4 It is a schematic diagram of a valve plate bracket in a multi-inlet one-way valve structure in Example 1 of the present invention.

[0034] Figure 5 It is a front view of a valve plate bracket in a multi-inlet one-way valve structure in Example 1 of the present invention.

[0035] Figure 6 The present invention Figure 5Schematic diagram of the BB section.

[0036] Figure 7 It is a schematic diagram of a multi-inlet one-way valve structure in Embodiment 2 of the present invention.

[0037] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0038] Among them: 1. valve body; 2. pin shaft; 3. valve plate; 4. valve plate bracket; 5. positioning pin; 6. sealing ring; 7. connecting flange; 3-1. valve plate body; 3-2. connecting piece; 3-3. open groove, 4-1. bracket body, 4-2. recess, 4-3. step, 4-4. positioning hole, 4-5. pressure relief hole, 4-6. connecting hole. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0040] 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 invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0041] As introduced in the background technology, the one-way valve in the prior art has the problem of only one inlet and one outlet. In order to solve the above technical problem, the present invention proposes a multi-inlet one-way valve structure.

[0042] Embodiment 1

[0043] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a multi-inlet one-way valve structure includes a valve body 1, the valve body 1 is provided with at least two inlets, the valve body is provided with an outlet at a set angle between two adjacent inlets, a connecting flange 7 is fixed at each inlet, the connecting flange 7 is engaged and connected with a valve plate bracket 4, the valve plate 3 is rotatably mounted on the valve plate bracket 4 through a pin shaft 2 so that the valve plate 3 can be opened toward the inside of the valve body 1 relative to the valve plate bracket 4, the valve plate bracket 4 is an annular part, and a step 4-3 is provided on the inner annular surface of the valve plate bracket 4 to position the valve plate when closing the inlet.

[0044] In this embodiment, the valve body 1 is a T-shaped structural member. The valve body is provided with two inlets. The central axes of the two inlets are vertically connected, the outlets are upward, and one of the inlets is downward. The opening directions of the valve plates 3 at the two inlets are both toward the outlets. When the outlet direction is upward, when the medium pressure in the pipeline connected to the corresponding inlet decreases, the valve plate 3 is automatically closed under the action of gravity and the pressure difference on both sides thereof (the pressure difference between the pressure in the valve body and the pressure in the pipeline); of course, when the valve body is horizontally arranged, the valve plate returns to its position under the action of the pressure difference on both sides thereof.

[0045] Specifically, the valve disc 3 is installed on the valve disc bracket 4 through the pin shaft 2. The valve disc 3 can rotate freely around the pin shaft 2. The valve disc bracket 4 with the valve disc 3 installed is embedded in the connecting flange of the valve body 1 and is pressed and fixed on the valve body through the connecting flange of the pipeline. The structure and size of the valve discs 3 at the two inlets are the same. The valve disc position shown by the dotted line is the open state of the one-way valve, and the valve disc position shown by the solid line is the closed position of the one-way valve. The positioning pin 5 can ensure the installation position of the valve disc.

[0046] refer to Figure 2 and Figure 3 As shown, the valve plate 3 includes a valve plate body 3-1, which is circular. The shape of the valve plate body 3-1 is the same as the shape of the hollow part of the valve plate bracket 4. A connecting piece 3-2 is arranged on one side of the valve plate body 3-1. The connecting piece 3-2 is in the shape of a long strip, specifically a rectangular shape. The connecting piece 3-2 is provided with a pin hole along its length direction. The pin shaft 2 passes through the pin hole and is connected to the valve plate bracket 4, so that the valve plate 3 can be automatically rotated relative to the pin shaft to open or close the inlet.

[0047] refer to Figure 3 As shown, an open groove 3-3 is provided on the side of the valve plate body 3-1 facing the valve body 1. The open groove 3-3 is provided close to the connecting piece 3-2. The width of the open groove 3-3 is smaller than the radius of the valve plate body 3-1. The open groove cooperates with the valve body to avoid excessive valve plate opening and is beneficial to controlling the weight of the valve plate body.

[0048] refer to Figure 4 As shown, the valve plate bracket 4 includes an annular bracket body 4-1, and a step 4-3 is arranged on the inner annular surface of the bracket body 4-14 to position the valve plate 3 when closing the inlet, that is, the inner diameter of the bracket body at the step 4-3 is smaller than the diameter of the valve plate, the inner diameter of the inner annular surface of the bracket body is larger than the diameter of the valve plate, and the distance between the inner end surface of the valve plate bracket 4 (the end facing the valve body is the inner end surface) is larger than the distance between the step and the outer end surface of the valve plate bracket 4, refer to Figure 6As shown, the inner annular surface of the bracket body 4-1 is horn-shaped on the side of the step 4-3 facing the inner end surface of the valve plate bracket, and a pressure relief hole 4-5 is arranged on the horn-shaped side of the inner annular surface of the bracket body 4-1. The pressure relief hole is arranged close to the positioning hole. The pressure relief hole 4-5 is arranged to relieve pressure when the valve plate falls back, so as to prevent the problem of incomplete return of the valve plate due to the opposite pipeline being filled with liquid;

[0049] refer to Figure 5 As shown, a recess 4-2 is provided on the side of the bracket body 4-1 facing the valve body 1, and the depth of the recess is less than the thickness of the bracket body. The recess 4-2 is used to accommodate the connecting piece of the valve plate 3 to ensure the rotation of the valve plate 3 relative to the valve plate bracket. The width of the recess 4-2 is compatible with the width of the connecting piece. The bracket body 4-1 is provided with a connecting hole 4-6, which is communicated with the recess, and the connecting holes are located on both sides of the recess. The pin shaft 2 passes through the connecting hole 4-6 and is installed with the pin hole of the valve plate 3. A positioning hole is provided on the opposite side of the recess of the bracket body 4-1, and the positioning hole is arranged through the thickness direction of the bracket body. The positioning pin 5 passes through the valve plate bracket 4 and is connected with the connecting flange 7.

[0050] In addition, regarding the connecting flange 7, the connecting flange 7 is a pipeline connecting flange. The end of the connecting flange 7 facing the inlet of the valve body 1 can be connected to the valve body 1 through a threaded structure. A sealing member is arranged on the other end face of the connecting flange 7. The sealing member is specifically a sealing ring 6. The inner diameter of the sealing ring 6 is larger than the outer diameter of the valve plate bracket 4. The sealing ring 6 is a seal at the two inlet flanges to ensure that there will be no medium leakage between the one-way valve and the pipeline connecting flange.

[0051] It is easy to understand that the valve body 1 is connected to corresponding pipelines at two inlets respectively. During normal operation, only the valve plate at one inlet is in the open state. When switching is required, the medium pressure in the pipeline decreases, the valve plate is closed to prevent the medium from flowing back, the pressure in the standby pipeline increases, and the corresponding valve plate opens to complete the pipeline switching.

[0052] A working method of a multi-inlet one-way valve structure, comprising the following contents:

[0053] The valve body 1 is provided with at least two inlets, and the valve body is also provided with an outlet;

[0054] Install the valve disc 3 through the valve disc support 4, fix the valve disc support 4 with the valve disc to the connecting flange 7, and fix the connecting flange to the inlet of the valve body;

[0055] The inlets of valve body 1 are connected to the corresponding pipelines respectively. During normal operation, only one valve plate at the inlet rotates to the inside of the valve body and is in an open state. When switching is required, the medium pressure in the pipeline decreases, and the corresponding valve plate is closed to prevent the medium from flowing back. The medium pressure in the other pipeline increases, and the valve plate at the corresponding inlet opens to complete the pipeline switching.

[0056] The one-way valve structure provided in the present embodiment includes a valve body, which is provided with at least two inlets and an outlet. A connecting flange is provided at the inlet, and a valve plate bracket is installed through the connecting flange. The valve plate is installed through the valve plate bracket. In this way, under normal conditions, one valve plate is open relative to the valve plate bracket, and the working medium enters the valve body through the inlet and is discharged from the outlet. When the pressure of the working medium at the inlet is reduced, the working medium can enter the valve body through another inlet. In this way, the pipeline design is simplified, and the overall pipeline layout is relatively convenient and will not occupy a large space. In addition, two or more inlets can be provided to meet different usage requirements.

[0057] Embodiment 2

[0058] The difference between this embodiment and the first embodiment is that:

[0059] refer to Figure 7 As shown, the valve body 1 is a cross-shaped component, and the valve body is provided with three inlets, two of which are arranged opposite to each other, and the other inlet is arranged opposite to the outlet. A valve plate 3 is installed at each inlet through a valve plate bracket, and the valve plate bracket 4 is embedded in the connecting flange 7. The connecting flange 7 is fixed at the inlet, and the opening or closing of the corresponding inlet is controlled by the corresponding valve plate; the opening directions of the valve plates at the three inlets are all opened toward the outlet direction. When the outlet direction is set upward, the opening directions of the valve plates are all set upward to facilitate the rapid return of the valve plate.

[0060] Embodiment 3

[0061] The present embodiment discloses a diesel engine cooling system, including a multi-inlet one-way valve structure described in the first or second embodiment, wherein each inlet is connected to a pipeline, a pressure sensor is provided at the pipeline, the pressure sensor is connected to a controller, each pipeline is provided with a control switch, and the controller is connected to the control switch. In this way, the pressure sensor at the corresponding pipeline detects the pressure in the pipeline and sends it to the controller. When the controller calculates that the pressure reduction value in the pipeline is large, it can control the control switch of another pipeline to open, so that the water supply of the cooling system can be guaranteed without shutting down the machine.

[0062] The controller may be a control center of the diesel engine, the control switch may be a solenoid valve, and when the working medium transported in the pipeline is water, the pressure sensor may be a water pressure sensor.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-inlet one-way valve structure, characterized in that: The valve body comprises a valve body, which is provided with at least two inlets, and the valve body is provided with an outlet at a set angle between two adjacent inlets. A connecting flange is fixed at each inlet, and the connecting flange is snap-connected with a valve plate bracket. The valve plate is rotatably mounted on the valve plate bracket through a pin shaft so that the valve plate can be opened toward the inner side of the valve body relative to the valve plate bracket. The valve plate bracket is an annular part, and a step is provided on the inner annular surface of the valve plate bracket to position the valve plate when closing the inlet.

2. A multi-inlet one-way valve structure according to claim 1, characterized in that: The valve body is provided with two inlets, the central axes of the two inlets are vertically connected, the connection points of the two valve plates and the corresponding valve plate brackets are diagonally arranged, and the opening directions of the valve plates at the two inlets are both opened towards the outlet direction.

3. A multi-inlet one-way valve structure according to claim 1, characterized in that: The valve body is provided with three inlets, two of which are arranged opposite to each other, and the other inlet is arranged opposite to the outlet, and the opening directions of the valve plates at the three inlets are all opened towards the outlet.

4. A multi-inlet one-way valve structure according to claim 1, characterized in that: The valve plate comprises a valve plate body, the shape of which is the same as the shape of the hollow part of the valve plate bracket. A connecting piece is arranged on one side of the valve plate body, the connecting piece is in the shape of a long strip, and a pin hole is opened along the length direction of the connecting piece.

5. A multi-inlet one-way valve structure according to claim 4, characterized in that: An open groove is arranged on one side of the valve plate body facing the valve body, the open groove is arranged close to the connecting piece, and the width of the open groove is smaller than the radius of the valve plate body.

6. A multi-inlet one-way valve structure according to claim 4, characterized in that: The inner annular surface of the valve plate support is in a trumpet shape on the side of the step facing the inner end surface of the valve plate support, and a pressure relief hole is arranged on the trumpet-shaped side of the inner annular surface of the valve plate support; The distance between the step and the inner end surface of the valve plate support is greater than the distance between the step and the outer end surface of the valve plate support.

7. A multi-inlet one-way valve structure according to claim 6, characterized in that: The valve plate bracket includes a bracket body, a recess is arranged on one side of the bracket body, the recess is used to accommodate the connecting piece of the valve plate, the valve plate body is provided with a connecting hole communicating with the recess, and the connecting hole can communicate with the pin hole of the valve plate.

8. A multi-inlet one-way valve structure according to claim 1, characterized in that: One end of the connecting flange is snap-connected with the valve body, and a sealing member is fixed to the other end of the connecting flange. The inner diameter of the sealing member is greater than the outer diameter of the valve plate bracket.

9. A diesel engine cooling system, characterized in that: A multi-inlet one-way valve structure comprising any one of claims 1-8, wherein each inlet is connected to a pipeline, a pressure sensor is provided at the pipeline, the pressure sensor is connected to a controller, each pipeline is provided with a control switch, and the controller is connected to the control switch.

10. A working method of a multi-inlet one-way valve structure according to any one of claims 1 to 8, characterized in that: It includes the following: The valve body is provided with at least two inlets, and the valve body is also provided with an outlet; Install the valve disc through the valve disc bracket, fix the valve disc bracket with the valve disc to the connecting flange, and fix the connecting flange to the inlet of the valve body; The inlets of the valve body are connected to the corresponding pipelines respectively. During normal operation, only one valve plate at the inlet rotates to the inside of the valve body and is in an open state. When switching is required, the medium pressure in the pipeline decreases, and the corresponding valve plate closes to prevent the medium from flowing back. The medium pressure in the other pipeline increases, and the valve plate at the corresponding inlet opens to complete the pipeline switching.

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