Head-replaceable buffer type overflow valve suitable for branch pipeline

Abstract

The utility model relates to a head-replaceable buffer type overflow valve suitable for a branch pipeline, which comprises a valve body, an adjusting cavity is distributed in the valve body, an elastic buffer device is arranged in the adjusting cavity, the front end of the valve body is in threaded connection with a replaceable valve head, and the replaceable valve head comprises a valve head body. An inflow hole is formed in the front side of the valve head body, and overflow holes distributed on one side are formed in the side end of the valve head body, or a through overflow hole is formed in the side end of the valve head body; a valve element is connected to the elastic buffering device, a plug is installed at the front end of the valve element, and retraction grooves are distributed in the positions, corresponding to the plug, of the valve body. Therefore, the installed valve head body is designed in a replaceable valve head mode, allocation and selection can be carried out according to preset butt joint calibers of different branch pipelines or the pipe diameters of the branch pipelines, the whole valve body does not need to be replaced, the implementation cost is reduced, and the universality is better. According to the actual situation, the overflow holes distributed on the single side or the overflow holes penetrating through the single side are selected, and different overflow guiding directions and flows can be provided.

Description

Technical Field

[0001] The utility model relates to a relief valve, in particular to a replaceable head buffering relief valve suitable for branch pipelines. Background Art

[0002] Currently, the lubrication supply for some large-scale equipment often requires different pipelines to coordinate and direct the various types of lubricants. The conventional method is to use a main line for lubrication, with corresponding branch lines used to divert the flow to different components. This can easily cause the main line's fluid pressure to be too high compared to the branch line, affecting the flow of lubricant in the branch line. Currently, the conventional method is to install a relief valve and connect it to the corresponding relief line to achieve appropriate oil pressure balance while ensuring lubricant circulation.

[0003] However, because branch lines attached to different equipment vary in interface and diameter, custom-designed relief valves are often required, increasing implementation costs. Furthermore, in some high-pressure branch lines, relief valves are susceptible to oil pressure shocks, causing the valve core within to inadvertently impact the valve body. Furthermore, excessive pressure differentials can impact the valve head after reset, causing abnormal deformation and shortening its service life.

[0004] In view of the above-mentioned defects, the designer has actively carried out research and innovation in order to create a replaceable head buffer overflow valve suitable for branch pipelines, making it more valuable for industrial use. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a buffer-type overflow valve with a replaceable head suitable for branch pipelines.

[0006] The utility model discloses a replaceable head buffer type overflow valve suitable for branch pipeline, including valve body, wherein: the valve body is distributed with adjusting chamber, the elastic buffer device is installed in the adjusting chamber, the front end of valve body is connected with the replacement type valve head, the replacement type valve head includes valve head body, the front side of valve head body is provided with inflow hole, the side end of valve head body is provided with one -sided distribution overflow hole, or, the side end of valve head body is provided with the overflow hole of through -going, the valve core is connected on the elastic buffer device, the front end of valve core is installed with the plug, the position of valve body corresponds the plug, and is distributed with the retraction groove, the elastic buffer device includes the limiting seat of installing in adjusting chamber bottom, the limiting seat extends the limiting convex column, the overflow spring is sleeved on the limiting convex column, the upper end of overflow spring is installed with spring seat, and the valve core is connected with spring seat, the valve core is located between spring seat and replacement type valve head, and is provided with the buffer spring, the inboard of valve body is embedded with the limiting ring, and the tail end of buffer spring is pressed and combined limit by the limiting ring, in standby state, the plug blocks inflow hole and overflow hole respectively.

[0007] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the valve body is distributed with butt convex, the butt convex is sleeved with sealing ring.

[0008] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the limiting convex column is provided with inner recess cavity, and the inner recess cavity is filled with buffer rubber pad.

[0009] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the spring seat is distributed with contact washer, and the contact washer is in contact with the inner wall of adjusting chamber.

[0010] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the spring seat is distributed with plug-in guide cylinder, and the valve core is interference fit with plug-in guide cylinder, or, the valve core is screw connected with plug-in guide cylinder.

[0011] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the plug is distributed with inner recess buffer mechanism at the position corresponding inflow hole and overflow hole.

[0012] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the rear end of replacement type valve head extends with contact guide column, and the front end of overflow spring is inserted into contact guide column.

[0013] Further, the above-mentioned replaceable head buffer type overflow valve suitable for branch pipeline, wherein, the wire diameter of overflow spring is less than the wire diameter of buffer spring, and the wire diameter of overflow spring is 2 to 3.5 millimeters.

[0014] Furthermore, in the above-mentioned replaceable-head buffer-type overflow valve suitable for branch pipelines, the front end of the replaceable valve head is provided with a circular chamfer.

[0015] By means of the above solution, the present invention has at least the following advantages:

[0016] 1. The installed valve head body is designed as a replaceable valve head. It can be adjusted according to the preset docking diameter of different branch pipelines or the diameter of the branch pipeline itself. There is no need to replace the entire valve body, which reduces implementation costs and has better versatility.

[0017] 2. According to the actual situation, choose single-side distributed overflow holes or through-hole overflow holes to provide different overflow directions and flow rates to meet the overflow needs of different branch pipelines.

[0018] 3. An independent elastic buffer device is provided, which will not cause the valve body to be hit when high-pressure overflow occurs, and will not cause the replaceable valve head to be impacted when resetting.

[0019] 4. The overall structure is simple, and springs of unequal diameters are used to achieve buffering and overflow control respectively, which is easy to maintain and does not require the intervention of electronic devices, thereby improving the stability of use.

[0020] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of a replaceable head buffer-type relief valve suitable for branch pipelines.

[0022] The meanings of the reference numerals in the figures are as follows.

[0023] 1 valve body 2 replaceable valve head

[0024] 3 inlet holes 4 overflow holes

[0025] 5 valve core 6 plug

[0026] 7 retraction groove 8 limit seat

[0027] 9 Overflow spring 10 Spring seat

[0028] 11 buffer spring 12 limit ring

[0029] 13 sealing ring 14 buffer rubber pad 15 DETAILED DESCRIPTION

[0031] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0032] like Figure 1 The replaceable head buffer overflow valve suitable for branch pipelines includes a valve body 1. Its uniqueness lies in that an adjusting chamber is distributed in the valve body 1, and an elastic buffer device is installed in the adjusting chamber, which is convenient for achieving appropriate slow release when impacted by a large flow of liquid from the main pipeline, and will not cause improper impact on the valve body 1. At the same time, the front end of the valve body 1 is threadedly connected with a replaceable valve head 2. In this way, according to the pipe diameter and style of the reserved interface of the current branch pipeline, a suitable replaceable valve head 2 can be selected to meet the maximum compatible installation without replacing the entire valve body 1, thereby reducing the implementation cost. Specifically, the replaceable valve head 2 used includes a valve head body, an inlet hole 3 is provided on the front side of the valve head body, a unilateral distributed overflow hole 4 is provided on the side end of the valve head body, or a through overflow hole 4 is provided on the side end of the valve head body. In this way, one-way overflow or two-way overflow can be selected according to needs to meet the overflow discharge needs of different flow rates. During implementation, in order to achieve effective buffering and slow release, a valve core 5 is connected to the elastic buffer device, a plug 6 is installed at the front end of the valve core 5, and a retraction groove 7 is distributed at the position of the plug 6 on the valve body 1. In this way, the plug 6 has a certain retraction stroke, and when it is subjected to excessive hydraulic shock, retraction overflow is achieved. In order to have a better buffering effect, the elastic buffer device includes a limit seat 8 installed at the bottom of the regulating chamber, the limit seat 8 extends a limit boss, and an overflow spring 9 is sleeved on the limit boss. The upper end of the overflow spring 9 is installed with a spring seat 10, and the valve core 5 is connected to the spring seat 10. At the same time, considering the obstruction before overflow and the reset after overflow is completed, the valve core 5 is located between the spring seat 10 and the replaceable valve head 2, and a buffer spring 11 is inserted therethrough. During implementation, a limit ring 12 is embedded in the inner side of the valve body 1, and the tail end of the buffer spring 11 is limited by the pressure of the limit ring 12. In this way, when the buffer spring 11 is reset, its tail end will not jump due to its own elastic stress, which will not affect the reset closing effect. When in standby mode, the plug 6 blocks the inlet hole 3 and the overflow hole 4 respectively to avoid overflow in such a hydraulic situation.

[0033] In accordance with a preferred embodiment of the present invention, the valve body 1 is provided with docking bosses, which are sleeved with sealing rings 13. This ensures that after installation, the tail end of the valve body 1 is tightly fitted, preventing loosening due to fluid impact during overflow, and effectively preventing vibration.

[0034] Furthermore, a concave cavity is provided in the limiting boss, and the concave cavity is filled with a buffer rubber pad 14. In this way, even if an abnormal impact of a large hydraulic pressure occurs, causing the overflow spring 9 to be sharply compressed, the valve core 5 will not cause an abnormal impact on the limiting seat 8.

[0035] In practical implementation, contact washers are distributed around the spring seat 10, contacting the inner wall of the regulating chamber. Simultaneously, one end of each of the overflow spring 9 and buffer spring 11 rests against one end face of the contact washer. This prevents abnormal distortion of the overflow spring 9 and buffer spring 11 during deformation, ensuring they provide accurate deformation stress.

[0036] At the same time, considering the convenience of installing the valve core 5, a plug guide is distributed on the spring seat 10, and the valve core 5 and the plug guide are interference fit, or the valve core 5 and the plug guide are threadedly connected. In addition, a concave buffer mechanism is distributed at the position of the plug 6 corresponding to the inlet hole 3 and the overflow hole 4. In this way, when the plug 6 is retracted and opened at the initial stage of overflow, or when it is reset at the initial stage after the overflow ends, it can avoid the liquid flow from forming turbulence on its surface, without affecting its movement stroke, and can effectively use the concave buffer mechanism to properly dissipate the stress of the impacting liquid flow. Furthermore, a contact guide column extends from the rear end of the replaceable valve head 2, and the front end of the overflow spring 9 is inserted into the contact guide column. In this way, the front end of the overflow spring 9 can better fit with the replaceable valve head 2, and there will be no abnormal twisting or skewing of the front end, ensuring that the plug 6 is in the appropriate position when in standby or reset state.

[0037] Furthermore, the wire diameter of the overflow spring 9 is smaller than that of the buffer spring 11, and the wire diameter of the overflow spring 9 is 2 to 3.5 mm. This ensures that during the period when the plug 6 is compressed and retracted, the overflow is first generated by the overflow spring 9. Afterwards, the buffer spring 11 appropriately absorbs the stress impact caused by the reset of the overflow spring 9, achieving a certain degree of buffering, and preventing the spring seat 10 from causing unnecessary impact on the replaceable valve head 2 during the reset period. Furthermore, the front end of the replaceable valve head 2 is provided with a circular chamfer. In this way, after docking with the branch line, the inner wall of the branch line will not be scratched by the sharp front end.

[0038] The working principle of this utility model is as follows:

[0039] The user selects a suitable replacement valve head 2 according to the size and structure of the current branch pipeline overflow structure and connects it to the valve body 1.

[0040] During use, after being impacted by a flow exceeding a preset hydraulic pressure, the plug 6 begins to retreat. During this period, the plug 6 carries the valve core 5 backward, and the valve core 5 synchronously carries the spring seat 10 backward, eventually causing the overflow spring 9 to be compressed and deformed.

[0041] At this time, with the continuous impact of the liquid flow, the plug 6 loses its blocking effect, making the overflow hole 4 and the inlet hole 3 in a conductive state. The high-pressure liquid begins to overflow and discharge through the overflow port, avoiding high-pressure abnormalities in the branch pipeline.

[0042] After overflow is complete, the hydraulic pressure in the branch line returns to normal. The overflow spring 9 overcomes the current hydraulic pressure, allowing the plug 6 to reset. During this period, the forward movement of the spring seat 10 is moderately restrained by the buffer spring 11, preventing it from directly impacting the replaceable valve head 2, thus achieving a buffered reset.

[0043] Finally, the overflow spring 9 is completely reset, so that the plug 6 blocks the inlet hole 3 and the overflow hole 4 simultaneously, and the branch line is in normal liquid flow guidance without external overflow.

[0044] It can be seen from the above text description and the accompanying drawings that the present invention has the following advantages:

[0045] 1. The installed valve head body is designed as a replaceable valve head, which can be adjusted according to the preset docking diameter of different branch pipelines or the diameter of the branch pipeline itself. There is no need to replace the entire valve body, which reduces the implementation cost and has better versatility.

[0046] 2. According to the actual situation, choose single-side distributed overflow holes or through-hole overflow holes to provide different overflow directions and flow rates to meet the overflow needs of different branch pipelines.

[0047] 3. An independent elastic buffer device is provided, which will not cause the valve body to be hit when high-pressure overflow occurs, and will not cause the replaceable valve head to be impacted when resetting.

[0048] 4. The overall structure is simple, and springs of unequal diameters are used to achieve buffering and overflow control respectively, which is easy to maintain and does not require the intervention of electronic devices, thereby improving the stability of use.

[0049] In addition, the indicated orientations or positional relationships described in the present invention are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or structure referred to must have a specific orientation or be operated in a specific orientation structure. Therefore, they cannot be understood as a limitation on the present invention.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A replaceable head buffer-type relief valve suitable for branch lines, comprising a valve body, characterized in that: An adjusting cavity is distributed in the valve body, an elastic buffer device is installed in the adjusting cavity, a replaceable valve head is threadedly connected to the front end of the valve body, and the replaceable valve head includes a valve head body; The front side of the valve head body is provided with an inlet hole, the side end of the valve head body is provided with a single-side distributed overflow hole, or the side end of the valve head body is provided with a through overflow hole; The elastic buffer device is connected to a valve core, a plug is installed at the front end of the valve core, and a retraction groove is distributed at the position of the valve body corresponding to the plug; The elastic buffer device includes a limit seat installed at the bottom of the regulating chamber, the limit seat extends to a limit boss, an overflow spring is sleeved on the limit boss, the upper end of the overflow spring is installed with a spring seat, and the valve core is connected to the spring seat; the valve core is located between the spring seat and the replaceable valve head, and is penetrated by a buffer spring; a limit ring is embedded in the inside of the valve body, and the tail end of the buffer spring is pressed and limited by the limit ring; when in standby state, the plug blocks the inlet hole and the overflow hole respectively.

2. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1 is characterized in that: The valve body is provided with docking bosses, and the docking bosses are sleeved with sealing rings.

3. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1, characterized in that: An inner concave cavity is formed in the limiting boss, and a buffer rubber pad is filled in the inner concave cavity.

4. The replaceable head buffer-type overflow valve suitable for branch lines according to claim 1, characterized in that: Contact washers are distributed around the spring seat, and the contact washers are in contact with the inner wall of the regulating cavity.

5. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1, characterized in that: A plug guide cylinder is distributed on the spring seat, and the valve core and the plug guide cylinder are interference fit, or the valve core and the plug guide cylinder are threadedly connected.

6. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1, characterized in that: Concave buffer mechanisms are distributed at the positions of the plug corresponding to the inlet hole and the overflow hole.

7. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1, characterized in that: A contact guide column is extended from the rear end of the replaceable valve head, and a front end of the overflow spring is inserted into the contact guide column.

8. The replaceable head buffer-type overflow valve suitable for branch pipelines according to claim 1, characterized in that: The wire diameter of the overflow spring is smaller than that of the buffer spring, and the wire diameter of the overflow spring is 2 to 3.5 mm.

9. The replaceable head buffer-type relief valve suitable for branch pipelines according to claim 1, characterized in that: The front end of the replaceable valve head is provided with a circular arc chamfer.

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