Single-wire distributor with auxiliary pressure relief function

Abstract

The single-line distributor with the auxiliary pressure relief function comprises a distributor body and a pressure relief valve, the distributor body is provided with a pressure relief valve installation part, and the pressure relief valve installation part is provided with a transition cavity connected with a grease inlet channel of the distributor body; the pressure relief valve comprises a grease inlet connector and a plunger, the grease inlet connector is fixed to the end, away from the grease inlet oil channel, of the pressure relief valve mounting part, the plunger is slidably arranged in the pressure relief valve mounting part and located at the end, close to the transition cavity, of the grease inlet connector, and an elastic piece is arranged between the pressure relief valve mounting part and the plunger; the plunger is provided with a blind hole and a through hole communicated with the blind hole, the blind hole is communicated with the grease inlet connector, the blind hole extends in the axial direction of the plunger, and the through hole extends in the radial direction of the plunger; when the grease inlet connector is loaded, the grease inlet connector is communicated with the transition cavity through the through hole; when the grease inlet connector is unloaded, the elastic piece drives the plunger to move towards the grease inlet connector, and vacuum suction force is generated in the transition cavity. And quick response and reliable operation of the single-line distributor are guaranteed through the pressure relief valve.

Description

Technical Field

[0001] This invention relates to the field of grease dispenser technology, and more particularly to a single-line dispenser with an auxiliary pressure relief function. Background Technology

[0002] As a key component of a centralized lubrication system, the single-line distributor's main function is to deliver pressurized grease supplied by the grease pump to multiple lubrication points in a metered manner. Its advantage is that if one grease outlet branch on the distributor becomes blocked, it will not affect the lubrication of other branches.

[0003] After each grease supply, the grease supply line must be depressurized to ensure that the single-line distributor can quickly and thoroughly perform secondary grease filling, thus preparing for the next replenishment of grease to the lubrication points. Because the grease has a relatively high viscosity and a large amount of base oil separates out, in low-temperature operating environments, traditional single-line distributors experience significant flow resistance during spring reset, resulting in prolonged reset time or even failure to reset. This causes the single-line distributor to fail to properly distribute grease in the next cycle, leading to delayed and insufficient secondary grease filling response, resulting in insufficient grease supply, low efficiency, and other problems, affecting the actual lubrication effect of the equipment. All of these situations pose potential safety hazards for the reliable operation of the equipment. Summary of the Invention

[0004] This invention provides a single-line distributor with auxiliary pressure relief function to overcome the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A single-line distributor with auxiliary pressure relief function includes: a distributor and a pressure relief valve, wherein the distributor is provided with a pressure relief valve mounting part, and the pressure relief valve mounting part is provided with a transition cavity connected to the grease inlet passage of the distributor; The pressure relief valve includes a grease inlet connector and a plunger. The grease inlet connector is fixed at the end of the pressure relief valve mounting part away from the grease inlet passage. The plunger is slidably disposed in the pressure relief valve mounting part and located at the end of the grease inlet connector near the transition chamber. An elastic element is provided between the pressure relief valve mounting part and the plunger. The plunger is provided with a blind hole and a through hole communicating with the blind hole. The blind hole is connected to the grease inlet connector. The blind hole extends axially along the plunger, and the through hole extends radially along the plunger. When the grease inlet connector is under load, it communicates with the transition cavity through the through hole; when the grease inlet connector is unloaded, the elastic element drives the plunger to move toward the grease inlet connector, generating a vacuum suction force in the transition cavity.

[0006] Furthermore, the elastic element is a return spring sleeved on the plunger.

[0007] Furthermore, the pressure relief valve mounting part is provided with a stepped hole, and the larger hole of the stepped hole is close to the grease inlet connector; The plunger includes a body and a boss disposed at one end of the body. The body is disposed in the small hole of the stepped hole, and the boss is located in the large hole of the stepped hole. One end of the return spring abuts against the boss, and the other end of the return spring abuts against the diameter change point of the stepped hole.

[0008] Furthermore, the main body is provided with a limiting part, the diameter of which is larger than the diameter of the stepped hole.

[0009] Furthermore, the grease inlet connector is threadedly connected to the pressure relief valve mounting part.

[0010] Furthermore, the plurality of through holes are radially distributed on the plunger.

[0011] Furthermore, the cross-sectional area of ​​the transition cavity is larger than the cross-sectional area of ​​the grease inlet channel.

[0012] Beneficial effects: This invention provides a single-line distributor with auxiliary pressure relief function. When unloading is required, the unloading valve can push the plunger to reset by the elastic element, so that the unloading of the system no longer depends solely on the spring of the single-line distributor, but is achieved by the spring of the single-line distributor and the elastic element of the unloading valve resetting together. The movement of the plunger creates a vacuum suction in the transition chamber, thereby reducing the pressure in the grease inlet channel, thus ensuring the rapid response and reliable operation of the single-line distributor. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a front view schematic diagram of a single-line distributor with auxiliary pressure relief function disclosed in this invention; Figure 2 This is a partial cross-sectional schematic diagram of a single-line distributor with auxiliary pressure relief function disclosed in this invention. Figure 1 ; Figure 3 This is a partial cross-sectional schematic diagram of a single-line distributor with auxiliary pressure relief function disclosed in this invention. Figure 2 ; Figure 4 for Figure 3 A magnified view of a portion of the image; Figure 5This is a cross-sectional schematic diagram of the plunger of a single-line distributor with auxiliary pressure relief function disclosed in this invention.

[0015] In the diagram: 1. Grease inlet passage; 2. Umbrella-shaped valve core; 3. Screw plug passage; 4. Screw plug; 5. Grease storage chamber; 6. Side passage; 7. Piston; 8. Grease outlet chamber; 9. Spring; 10. Grease outlet connector; 11. Distributor valve body; 12. Grease inlet connector; 13. Plunger; 131. Blind hole; 132. Through hole; 14. Return spring; 15. Boss; 16. Pressure relief valve mounting part; 17. Transition chamber; 18. Stepped hole; 19. Main body; 20. Limiting part. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This embodiment provides a single-line distributor with auxiliary pressure relief function, such as Figures 1 to 4 As shown, it includes: a distributor and a pressure relief valve, wherein the distributor is provided with a pressure relief valve mounting part 16, as shown. Figure 4 As shown, the pressure relief valve mounting part 16 is provided with a transition cavity 17 connected to the grease inlet passage 1 of the distributor; like Figure 3 and Figure 4 As shown, the pressure relief valve includes a grease inlet connector 12 and a plunger 13. The grease inlet connector 12 is fixed at one end of the pressure relief valve mounting part 16 away from the grease inlet passage 1. The plunger 13 is slidably disposed in the pressure relief valve mounting part 16 and located at one end of the grease inlet connector 12 near the transition chamber 17. An elastic element is provided between the pressure relief valve mounting part 16 and the plunger 13. like Figure 5 As shown, the plunger 13 is provided with a blind hole 131 and a through hole 132 communicating with the blind hole 131. The blind hole 131 is connected to the grease inlet connector 12. The blind hole 131 extends axially along the plunger 13, and the through hole 132 extends radially along the plunger 13. When the grease inlet connector 12 is loaded (i.e., when the pump connected to the grease inlet connector 12 is pressurized), the plunger 13 is pushed by the grease, the elastic element is compressed, and the grease inlet connector 12 is connected to the transition cavity 17 through the through hole 132; when the grease inlet connector 12 is unloaded (i.e. when the pump is depressurized), the elastic element drives the plunger 13 to move toward the grease inlet connector 12, generating a vacuum suction force in the transition cavity 17.

[0018] In this embodiment, the distributor adopts a common single-line distributor structure, and the pressure relief valve mounting part 16 is fixed on the distributor valve body 11 (which can be integrally formed). When the pump pressurizes, the grease flows in from the grease inlet passage 1, pushing the umbrella-shaped valve core 2 to move forward. The umbrella-shaped valve core 2 closes the screw plug passage 3 on the screw plug 4, thereby allowing the grease to enter the grease storage chamber 5. The grease pushes the piston 7 to move, compressing the spring 9, and discharging the grease stored in the grease outlet chamber 8 through the grease outlet connector 10. When the pump performs a pressure relief operation, the spring 9 pushes the piston 7 to move towards the grease storage chamber 5. The grease in the grease storage chamber 5 pushes the umbrella-shaped valve core 2 to move in the opposite direction. The umbrella-shaped valve core 2 closes the grease inlet passage 1. After passing through the screw plug passage 3 and the side passage 6, the grease enters the grease outlet chamber 8 for storage, waiting for the next grease dispensing operation.

[0019] This embodiment provides a single-line distributor with auxiliary pressure relief function. When unloading is required, the unloading valve can push the plunger 13 to reset by means of the elastic element, so that the unloading of the system no longer depends solely on the spring of the single-line distributor, but is achieved by the spring of the single-line distributor and the elastic element of the unloading valve resetting together. By moving the plunger 13, a vacuum suction is formed in the transition chamber 17, thereby reducing the pressure of the grease inlet passage 1, thus ensuring the rapid response and reliable operation of the single-line distributor.

[0020] Specifically, such as Figure 4 As shown, the elastic element is a return spring 14 sleeved on the plunger 13, and the pressure relief valve mounting part 16 is provided with a stepped hole 18, the large hole of the stepped hole 18 being close to the grease inlet connector 12. like Figure 5 As shown, the plunger 13 includes a body 19 and a boss 15 disposed at one end of the body 19. The body 19 is disposed in the small hole of the stepped hole 18, and the boss 15 is located in the large hole of the stepped hole 18. One end of the return spring 14 abuts against the boss 15, and the other end of the return spring 14 abuts against the diameter change of the stepped hole 18.

[0021] While the system is depressurized, the return spring 14 pushes the plunger 13 to reset. The through hole 132 at the end of the plunger 13 enters the small hole of the stepped hole 18 to achieve closure, so that a negative pressure is formed in the transition chamber 17. The pressure of the grease inlet passage 1 is reduced accordingly, so that the umbrella-shaped valve core 2 can be quickly and completely reset, ensuring that the grease outlet chamber 8 is quantitatively and quickly filled with grease, and ensuring the rapid response and reliable operation of the single-line distributor.

[0022] Specifically, such as Figure 5As shown, the main body 19 is provided with a limiting part 20, the diameter of which is larger than the diameter of the small hole of the stepped hole 18, so as to constrain the stroke of the plunger 13 (the boss 15 can move between the grease inlet connector 12 and the diameter change of the stepped hole 18).

[0023] Specifically, the grease inlet connector 12 is threadedly connected to the pressure relief valve mounting part 16 to facilitate the installation of the pressure relief valve.

[0024] Preferably, the plurality of through holes 132 are radially distributed on the plunger 13 to ensure that the grease is evenly discharged from the plunger 13 into the transition cavity 17.

[0025] Specifically, such as Figure 4 As shown, the cross-sectional area of ​​the transition cavity 17 is larger than the cross-sectional area of ​​the grease inlet channel 1 to ensure sufficient vacuum suction.

[0026] This embodiment provides a single-line distributor with auxiliary pressure relief function. It has a simple and compact structure, high reliability, and is easy to maintain, which can effectively ensure the rapid response and reliable operation of the single-line distributor.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-line distributor with auxiliary pressure relief function, characterized in that, include: The distributor and the pressure relief valve are provided. The distributor is provided with a pressure relief valve mounting part (16), and the pressure relief valve mounting part (16) is provided with a transition cavity (17) connected to the grease inlet passage (1) of the distributor. The pressure relief valve includes a grease inlet connector (12) and a plunger (13). The grease inlet connector (12) is fixed at one end of the pressure relief valve mounting part (16) away from the grease inlet passage (1). The plunger (13) is slidably disposed in the pressure relief valve mounting part (16) and located at one end of the grease inlet connector (12) near the transition chamber (17). An elastic element is provided between the pressure relief valve mounting part (16) and the plunger (13). The plunger (13) is provided with a blind hole (131) and a through hole (132) connected to the blind hole (131). The blind hole (131) is connected to the grease inlet connector (12). The blind hole (131) extends axially along the plunger (13), and the through hole (132) extends radially along the plunger (13). When the grease inlet connector (12) is under load, the grease inlet connector (12) is connected to the transition cavity (17) through the through hole (132); when the grease inlet connector (12) is unloaded, the elastic element drives the plunger (13) to move toward the grease inlet connector (12), generating a vacuum suction force in the transition cavity (17).

2. A single-line distributor with auxiliary pressure relief function according to claim 1, characterized in that, The elastic element is a return spring (14) sleeved on the plunger (13).

3. A single-line distributor with auxiliary pressure relief function according to claim 2, characterized in that, The pressure relief valve mounting part (16) is provided with a stepped hole (18), and the larger hole of the stepped hole (18) is close to the grease inlet connector (12). The plunger (13) includes a body (19) and a boss (15) disposed at one end of the body (19). The body (19) is disposed in the small hole of the stepped hole (18), and the boss (15) is located in the large hole of the stepped hole (18). One end of the return spring (14) abuts against the boss (15), and the other end of the return spring (14) abuts against the diameter change of the stepped hole (18).

4. A single-line distributor with auxiliary pressure relief function according to claim 2, characterized in that, The main body (19) is provided with a limiting part (20), the diameter of which is larger than the diameter of the small hole of the stepped hole (18).

5. A single-line distributor with auxiliary pressure relief function according to claim 1, characterized in that, The grease inlet connector (12) is threadedly connected to the pressure relief valve mounting part (16).

6. A single-line distributor with auxiliary pressure relief function according to claim 1, characterized in that, Multiple through holes (132) are radially distributed on the plunger (13).

7. A single-line distributor with auxiliary pressure relief function according to claim 1, characterized in that, The cross-sectional area of ​​the transition cavity (17) is larger than the cross-sectional area of ​​the grease inlet channel (1).

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