Double-piston progressive dispenser

Abstract

The double-plunger progressive distributor comprises a first valve body, at least one intermediate valve body and a tail valve body which are connected in a stack from top to bottom, two plunger cavities are opened in the intermediate valve body, one plunger cavity is opened in the tail valve body, plungers are sealably installed in the plunger cavities, the plungers comprise at least a first plunger and a fifth plunger which are arranged in the same intermediate valve body and a third plunger which is arranged in the tail valve body, the intermediate valve body and the tail valve body are marked with oil outlet amount marks on the side surfaces corresponding to the positions of the two ends of the plunger cavities, two sealing grooves with notches are opened in the bottom of the intermediate valve body corresponding to the positions of each plunger cavity, the sealing grooves are communicated with the left end and the right end of the adjacent plunger cavity, and two oil outlets close to one side of the plunger cavity are communicated with the inside of the upper plunger cavity. The design has the advantages of being capable of discharging oil at the current stage position and facilitating the printing management of the oil outlet amount marks.

Description

Technical Field

[0001] This utility model relates to the field of progressive dispenser technology, specifically a dual-plunger superimposed progressive dispenser. Background Technology

[0002] In the engineering machinery and forging industries, dual-plunger progressive distributors are widely used due to their high cost-effectiveness. However, some existing dual-plunger progressive distributors have identical plunger diameters, resulting in identical oil output at each outlet position. This limits their applicability to applications requiring varying oil output, significantly restricting their scope of application and making them unsuitable for today's rapidly changing application demands. Furthermore, in practical applications, the distributor must be assembled according to the user's specific displacement requirements. This necessitates printing the oil output at each outlet position. Since most existing plunger distributors design the oil output position after the current plunger's action to the next plunger position, the current oil output markings do not clearly indicate the current output. This leads to extremely chaotic management of the oil output markings at each outlet position, making management even more difficult for users unfamiliar with distributors after taking over. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-plunger progressive distributor that can dispense oil at the current primary position and facilitate the management of oil quantity marking and printing.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a dual-plunger progressive distributor, comprising a first valve body, at least one intermediate valve body, and a tail valve body stacked and connected from top to bottom. The intermediate valve body has two plunger chambers, and the tail valve body has one plunger chamber. A plunger is resealably installed in each plunger chamber. The plunger includes at least a first plunger and a fifth plunger located in the intermediate valve body (one level below the first valve body), and a third plunger located in the tail valve body. The first valve body has an oil inlet, and its bottom has a main oil inlet hole communicating with the oil inlet. The intermediate valve body has two oil outlets on opposite sides corresponding to the plunger chambers, and the tail valve body has two oil outlets on one side corresponding to the plunger chambers. The oil outlets are marked with an oil flow indicator reflecting the oil flow rate according to the diameter of the corresponding plunger. The intermediate valve body is one level below the first valve body. The valve body has a central oil inlet that communicates with the main oil inlet. The central oil inlet is connected to the plunger cavity inside the valve body. The plunger cavity where the fifth plunger is located is connected to the plunger cavity where the first plunger of the next stage is located through the first and second channels. The valve body also has a tail plate oil inlet in the middle that communicates with the central oil inlet. The tail plate oil inlet is connected to the middle of the plunger cavity where the third plunger is located. The bottom of the central valve body has two sealing grooves with slots corresponding to each plunger cavity. The sealing grooves connect the left and right ends of adjacent first-stage plunger cavities. Starting from the plunger cavity where the first plunger is located, each plunger cavity is connected to the adjacent next-stage plunger cavity in the next-stage valve body through the sealing groove. Starting from the plunger cavity where the third plunger is located, each plunger cavity is connected to the adjacent next-stage plunger cavity in the previous-stage valve body through the sealing groove. The two oil outlets on the side closest to a plunger cavity are connected to the interior of the previous-stage plunger cavity.

[0005] Furthermore, the first valve body is also provided with a first left passage and a first right passage. One end of the first left passage is connected to the left side of the plunger cavity where the fifth plunger is located through an oblique hole in the next-stage intermediate valve body, and the other end is connected to an oil outlet far from the fifth plunger. One end of the first right passage is connected to the right side of the plunger cavity where the fifth plunger is located through an oblique hole in the next-stage intermediate valve body, and the other end is connected to another oil outlet far from the fifth plunger. The tail valve body is also provided with a tail left passage and a tail right passage. One end of the tail left passage is connected to the plunger cavity where the previous-stage plunger is located through an oblique hole in the previous-stage intermediate valve body, and the other end is connected to an oil outlet on the tail valve body. One end of the tail right passage is connected to the plunger cavity where the previous-stage plunger is located through an oblique hole in the previous-stage intermediate valve body, and the other end is connected to another oil outlet on the tail valve body.

[0006] Furthermore, there are two intermediate valve bodies. The plungers in the intermediate valve body below the first valve body are the first plunger and the fifth plunger, and the plungers in the intermediate valve body above the tail valve body are the second plunger and the fourth plunger. The oil outlets include a first left oil outlet and a first right oil outlet located on the side of the first plunger, a fifth left oil outlet and a fifth right oil outlet located on the side of the fifth plunger, a second left oil outlet and a second right oil outlet located on the side of the second plunger, a fourth left oil outlet and a fourth right oil outlet located on the side of the fourth plunger, and a third left oil outlet and a third right oil outlet located on the side of the third plunger.

[0007] Furthermore, the two ends of the plunger cavity are sealed with plunger plugs, and the internal diameter of the plunger cavity is different. The diameters of the first plunger, second plunger, third plunger, fourth plunger and fifth plunger are different.

[0008] Furthermore, a sealing ring is embedded in the sealing groove.

[0009] The beneficial effects of this utility model are as follows: This utility model connects the interior of the upper-level plunger cavity through two oil outlets near one of the plunger cavities, and controls the hydraulic oil sent out from the current plunger cavity to flow back through the upper-level plunger cavity to the two oil outlets near the current plunger cavity. This achieves the corresponding oil output of the hydraulic oil entering and leaving the plunger cavity at the two oil outlet positions close to the plunger cavity. Finally, a corresponding oil output mark is printed on the valve body of the current stage to correspond to the oil output of the current plunger. This avoids the problem of chaotic oil output mark management at various positions of the distributor caused by the design of the oil output position of the current stage plunger cavity being designed at the position of the next stage plunger cavity in the prior art. The oil output mark is simpler, the logic of knowing the oil output is more intuitive, and the plunger cavity and plunger of different diameters can be designed according to actual application needs, thereby controlling the oil output of each plunger cavity, making the overall distributor more likely to meet the actual application needs of users. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of a dual-plunger progressive distributor.

[0011] Figure 2 This is a schematic diagram showing the cross-sectional unfolded profile of the plunger in a dual-plunger progressive distributor.

[0012] Figure 3 This is a schematic diagram of the oil outlet path in the left passage of a dual-plunger progressive distributor.

[0013] Figure 4 This is a schematic diagram of the oil outlet path in the right passage of a dual-plunger progressive distributor.

[0014] Figure 5 This is a schematic diagram of a half-section of the first valve body of a dual-plunger progressive distributor.

[0015] Figure 6 This is a half-sectional schematic diagram of the intermediate valve body of the first valve body in a preferred embodiment of a dual-plunger progressive distributor.

[0016] Figure 7 This is a half-sectional schematic diagram of the upper stage intermediate valve body of the tail valve body in a preferred embodiment of a dual-plunger progressive distributor.

[0017] Figure 8 This is a schematic diagram of a half-section of the tail valve body of a dual-plunger progressive distributor. Detailed Implementation

[0018] In order to make the technical means, innovative features and functions of this utility model easy to understand, this utility model will be further described below.

[0019] like Figure 1-8 As shown, the technical solution of the dual-plunger progressive distributor of this utility model includes a first valve body 1, at least one intermediate valve body 2, and a tail valve body 3 stacked and connected from top to bottom. The intermediate valve body 2 has two plunger chambers, and the tail valve body 3 has one plunger chamber. A plunger is sealed within each plunger chamber. The plunger includes at least a first plunger 7 and a fifth plunger 5 located in the intermediate valve body 2, which is one level below the first valve body 1, and a third plunger 9 located in the tail valve body 3. The first valve body 1 has an oil inlet 40, and its bottom has a main oil inlet 41 communicating with the oil inlet 40. The intermediate valve body 2 has two oil outlets on opposite sides corresponding to the plunger chambers, and the tail valve body 3 has two oil outlets on one side corresponding to the plunger chamber. The oil outlets are marked with an oil volume indicator reflecting the oil output according to the diameter of the corresponding plunger. The intermediate valve body 2, one level below the first valve body 1, has a main oil inlet 41 in the middle that communicates with the main plunger 40. The oil inlet 41 is connected to the intermediate oil inlet 42, which is connected to the interior of the plunger cavity located in the valve body. The plunger cavity where the fifth plunger 5 is located is connected to the plunger cavity where the first plunger 7 of the next stage is located through the first channel 44 and the second channel 45. The tail plate valve body 3 is provided with a tail plate oil inlet 34 in the middle, which is connected to the intermediate oil inlet 42. The tail plate oil inlet 34 is connected to the middle of the plunger cavity where the third plunger 9 is located. The bottom of the intermediate valve body 2 has two sealing grooves with slots corresponding to each plunger cavity position. The sealing grooves are connected to the left and right ends of the adjacent first-stage plunger cavities. Starting from the plunger cavity where the first plunger 7 is located, each plunger cavity is connected to the adjacent next-stage plunger cavity in the next-stage valve body through the sealing groove. Starting from the plunger cavity where the third plunger 9 is located, each plunger cavity is connected to the adjacent next-stage plunger cavity in the previous-stage valve body through the sealing groove. The two oil outlets on the side closer to a plunger cavity are connected to the interior of the previous-stage plunger cavity.

[0020] In a preferred embodiment of this utility model, such as Figure 1 , Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, there are two intermediate valve bodies 2. The plungers in the intermediate valve body 2 below the first valve body 1 are the first plunger 7 and the fifth plunger 5. The plungers in the intermediate valve body 2 above the tail valve body 3 are the second plunger 8 and the fourth plunger 10. The oil outlets include a first left oil outlet 12 and a first right oil outlet 13 located on the side of the first plunger 7, a fifth left oil outlet 20 and a fifth right oil outlet 21 located on the side of the fifth plunger 5, a second left oil outlet 14 and a second right oil outlet 15 located on the side of the second plunger 8, a fourth left oil outlet 18 and a fourth right oil outlet 19 located on the side of the fourth plunger 10, and a third left oil outlet 16 and a third right oil outlet 17 located on the side of the third plunger 9. The first valve body 1 also has a first left passage and a first right passage. One end of the passage is connected to the left side of the plunger cavity where the fifth plunger 5 is located through an oblique hole in the next-level intermediate valve body 2, and the other end is connected to the first left oil outlet 12. One end of the first right passage is connected to the right side of the plunger cavity where the fifth plunger 5 is located through an oblique hole in the next-level intermediate valve body 2, and the other end is connected to the first right oil outlet 13. The tail valve body 3 is also provided with a tail left passage and a tail right passage. One end of the tail left passage is connected to the plunger cavity where the second plunger 8 is located through an oblique hole in the previous-level intermediate valve body 2, and the other end is connected to the third left oil outlet 16 on the tail valve body 3. One end of the tail right passage is connected to the plunger cavity where the second plunger 8 is located through an oblique hole in the previous-level intermediate valve body 2, and the other end is connected to the third right oil outlet 17 on the tail valve body 3.

[0021] In the preferred embodiments described above, such as Figure 2 , Figure 3 and Figure 5 As shown, hydraulic oil enters the first valve body 1 through the inlet 40 and enters the two plunger chambers of the two intermediate valve bodies 2 through the main inlet 41, the intermediate inlet 42, and the lower inlet 43 respectively. Since the intermediate inlet 42 is connected to the plunger chamber inside the valve body and the initial position of the fifth plunger 5 is located at the right end of the plunger chamber, after the hydraulic oil enters the plunger chamber, it enters the right end of the plunger chamber where the first plunger 7 is located through the first channel 44, thereby pushing the first plunger 7 to move to the left. The hydraulic oil at the left end of the plunger chamber where the first plunger 7 is located flows back to the left end of the plunger chamber where the fifth plunger 5 is located through the second channel 45 and enters the inclined hole connected to the first left outlet 12. Finally, the hydraulic oil returns from the inclined hole to the position of the first left outlet 12 through the first left passage, realizing that the first left outlet 12 outputs oil after the first plunger 7 moves to the left, and thus the oil output markings at both ends of the first plunger 7 correspond to the actual oil output.

[0022] like Figure 2 , Figure 3 and Figure 5As shown, when the first plunger 7 moves to the left end of its plunger cavity, hydraulic oil enters the middle of the plunger cavity through the middle inlet hole 42 and then enters the right end of the plunger cavity where the second plunger 8 is located through the groove in the sealing groove. This pushes the second plunger 8 to move to the left. The hydraulic oil at the left end of the plunger cavity where the second plunger 8 is located returns through the groove in the sealing groove to the inclined hole connecting the plunger cavity where the first plunger 7 is located and the second left outlet 14. Finally, the hydraulic oil reaches the position of the second left outlet 14, realizing that after the second plunger 8 moves to the left, oil is discharged from the second left outlet 14. Thus, the oil discharge markings at both ends of the second plunger 8 correspond to the actual oil discharge.

[0023] like Figure 2 , Figure 3 , Figure 5 and Figure 7 As shown, when the second plunger 8 moves to the left end of its plunger cavity, hydraulic oil enters the middle of the plunger cavity through the lower inlet 43 and then enters the right end of the plunger cavity where the third plunger 9 is located through the groove in the sealing groove. This pushes the third plunger 9 to move to the left. The hydraulic oil at the left end of the plunger cavity where the third plunger 9 is located returns through the groove in the sealing groove to the inclined hole connecting the plunger cavity where the second plunger 8 is located and the third left outlet 16. Finally, the hydraulic oil reaches the position of the third left outlet 16, realizing that after the third plunger 9 moves to the left, oil is discharged from the third left outlet 16. Thus, the oil discharge markings at both ends of the third plunger 9 correspond to the actual oil discharge.

[0024] like Figure 2 , Figure 3 , Figure 5 and Figure 8 As shown, when the third plunger 9 moves to the left end of its plunger cavity, hydraulic oil enters the middle of the plunger cavity from the tail plate inlet 34 and then enters the right end of the plunger cavity where the fourth plunger 10 is located through the groove in the sealing groove. This pushes the fourth plunger 10 to move to the left. The hydraulic oil at the left end of the plunger cavity where the fourth plunger 10 is located returns through the groove in the sealing groove to the inclined hole connecting the plunger cavity where the third plunger 9 is located and the fourth left outlet 18. Finally, the hydraulic oil reaches the position of the fourth left outlet 18, realizing that the fourth plunger 10 moves to the left and oil is discharged from the fourth left outlet 18. Thus, the oil discharge markings at both ends of the fourth plunger 10 correspond to the actual oil discharge.

[0025] like Figure 2 , Figure 3 , Figure 5 and Figure 7As shown, when the fourth plunger 10 moves to the left end of its plunger cavity, hydraulic oil enters the middle of the plunger cavity through the lower inlet 43 and then enters the right end of the plunger cavity where the fifth plunger 5 is located through the groove in the sealing groove. This pushes the fifth plunger 5 to move to the left. The hydraulic oil at the left end of the plunger cavity where the fifth plunger 5 is located returns through the groove in the sealing groove to the inclined hole connecting the plunger cavity where the fourth plunger 10 is located and the fifth left outlet 20. Finally, the hydraulic oil reaches the position of the fifth left outlet 20, realizing that the fifth plunger 5 moves to the left and oil is discharged from the fifth left outlet 20. Thus, the oil discharge markings at both ends of the fifth plunger 5 correspond to the actual oil discharge.

[0026] like Figure 2 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, when the fifth plunger 5 moves to the left end of its plunger cavity, hydraulic oil enters the middle of the plunger cavity where the fifth plunger 5 is located through the middle inlet hole 42. Since the fifth plunger 5 is located at the left end of the plunger cavity at this time, the hydraulic oil enters the left end of the plunger cavity where the first plunger 7 is located through the second channel 45, pushing the first plunger 7 to move to the right. The hydraulic oil at the right end of the plunger cavity where the first plunger 7 is located flows back through the first channel 44 to the inclined hole connecting the plunger cavity where the fifth plunger 5 is located and the first right outlet 13. The hydraulic oil returns from the inclined hole to the first right outlet 13 through the first right passage, realizing that the first right outlet 13 outputs oil after the first plunger 7 moves to the right. Then, the oil output markings at both ends of the first plunger 7 correspond to the actual oil output, and the first plunger 7 reverses direction.

[0027] After the first plunger 7 moves to the right and completes the reversal, under the action of hydraulic progression, the second plunger 8, the third plunger 9, the fourth plunger 10, and the fifth plunger 5 successively complete the rightward movement. Correspondingly, the second right oil outlet 15, the third right oil outlet 17, the fourth right oil outlet 19, and the fifth right oil outlet 21 successively discharge oil. When the fifth plunger 5 completes the rightward movement, as described above, the first plunger 7 begins to move to the left. This cycle repeats, realizing the progressive oil distribution of the overall distributor.

[0028] In practical applications, in order to prevent hydraulic oil from leaking out of the valve body from the connection gap between the valve body through multiple sealing grooves under pressure, sealing rings can be embedded in the sealing grooves according to the actual situation. On the other hand, in order to improve the sealing performance of the plunger cavity, plunger plugs 6 are used to seal both ends of the plunger cavity.

[0029] Depending on the application requirements, a specific oil output may be required in actual application. Therefore, the internal diameter of the plunger cavity can be designed differently according to the actual oil output required by the customer, and plungers of different diameters can be installed in a targeted manner so that the distributor of this utility model can better meet the customer's oil output requirements.

[0030] Although the present invention has been disclosed above with specific embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the appended claims.

Claims

1. A dual-plunger progressive distributor, comprising a first valve body (1), at least one intermediate valve body (2), and a tail valve body (3) stacked and connected from top to bottom, wherein the intermediate valve body (2) has two plunger chambers, and the tail valve body (3) has one plunger chamber, wherein a plunger is sealedly installed in each plunger chamber, and the plunger includes at least a first plunger (7) and a fifth plunger (5) located in the intermediate valve body (2) one level below the first valve body (1), and a third plunger (9) located in the tail valve body (3), characterized in that: The first valve body (1) is provided with an oil inlet (40), and the bottom of the first valve body (1) is provided with a main oil inlet (41) communicating with the oil inlet (40). The intermediate valve body (2) is provided with two oil outlets on opposite sides corresponding to the plunger chambers. The tail valve body (3) is provided with two oil outlets on one side corresponding to the plunger chamber. The oil outlets are marked with an oil output indicator that reflects the oil output according to the diameter of the corresponding plunger. The intermediate valve body (2) below the first valve body (1) is provided with an intermediate oil inlet (42) communicating with the main oil inlet (41) in the middle. The intermediate oil inlet (42) is connected to the plunger chamber inside the valve body. The plunger chamber where the fifth plunger (5) is located is connected to the next stage through the first channel (44) and the second channel (45). The plunger cavity where the first plunger (7) is located is connected. The tail plate valve body (3) is provided with a tail plate oil inlet hole (34) in the middle, which is connected to the middle oil inlet hole (42). The tail plate oil inlet hole (34) is connected to the middle of the plunger cavity where the third plunger (9) is located. The bottom of the middle valve body (2) has two sealing grooves with slots corresponding to each plunger cavity position. The sealing grooves are connected to the left and right ends of the adjacent first-level plunger cavities. Starting from the plunger cavity where the first plunger (7) is located, each plunger cavity is connected to the next-level plunger cavity in the next-level valve body through the sealing groove. Starting from the plunger cavity where the third plunger (9) is located, each plunger cavity is connected to the next-level plunger cavity in the previous-level valve body through the sealing groove. The two oil outlets on the side closer to a plunger cavity are connected to the inside of the previous-level plunger cavity.

2. The dual-plunger progressive dispenser according to claim 1, characterized in that: The first valve body (1) is also provided with a first left passage and a first right passage. One end of the first left passage is connected to the left side of the plunger cavity where the fifth plunger (5) is located through an oblique hole in the next intermediate valve body (2), and the other end is connected to an oil outlet far away from the fifth plunger (5). One end of the first right passage is connected to the right side of the plunger cavity where the fifth plunger (5) is located through an oblique hole in the next intermediate valve body (2), and the other end is connected to another oil outlet far away from the fifth plunger (5). The tail valve body (3) is also provided with a tail left passage and a tail right passage. One end of the tail left passage is connected to the plunger cavity where the previous plunger is located through an oblique hole in the previous intermediate valve body (2), and the other end is connected to an oil outlet on the tail valve body (3). One end of the tail right passage is connected to the plunger cavity where the previous plunger is located through an oblique hole in the previous intermediate valve body (2), and the other end is connected to another oil outlet on the tail valve body (3).

3. The dual-plunger progressive dispenser according to claim 1 or 2, characterized in that: There are two intermediate valve bodies (2). The plungers in the intermediate valve body (2) below the first valve body (1) are the first plunger (7) and the fifth plunger (5). The plungers in the intermediate valve body (2) above the tail valve body (3) are the second plunger (8) and the fourth plunger (10). The oil outlets include the first left oil outlet (12) and the first right oil outlet (13) located on the side of the first plunger (7), the fifth left oil outlet (20) and the fifth right oil outlet (21) located on the side of the fifth plunger (5), the second left oil outlet (14) and the second right oil outlet (15) located on the side of the second plunger (8), the fourth left oil outlet (18) and the fourth right oil outlet (19) located on the side of the fourth plunger (10), and the third left oil outlet (16) and the third right oil outlet (17) located on the side of the third plunger (9).

4. Twin-plunger progressive dispenser according to claim 1 or 2, characterized in that: The plunger cavity is sealed at both ends with plunger plugs (6), and the diameter of the plunger cavity is different. The diameters of the first plunger (7), the second plunger (8), the third plunger (9), the fourth plunger (10) and the fifth plunger (5) are different.

5. The dual plunger progressive dispenser of claim 3, wherein: The plunger cavity is sealed at both ends with plunger plugs (6), and the diameter of the plunger cavity is different. The diameters of the first plunger (7), the second plunger (8), the third plunger (9), the fourth plunger (10) and the fifth plunger (5) are different.

6. The dual-plunger progressive dispenser according to claim 1, 2, or 5, characterized in that: The sealing groove is embedded with a sealing ring.

7. The dual plunger progressive dispenser of claim 3, wherein: The sealing groove is embedded with a sealing ring.

8. The dual-plunger progressive dispenser according to claim 4, characterized in that: The sealing groove is embedded with a sealing ring.

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