Combined seal mechanism and piston pump

Abstract

The utility model provides a combined sealing mechanism and piston pump, including piston cylinder, fixed assembly and reinforced sealing assembly, through with the combination sealing cover design is first arc combination piece and second arc combination piece's combined structure, the inside same design with the cooperation of wide size arc wide body sealing piece in the combination sealing cover of first arc combination piece and second arc combination piece composition, after first arc combination piece and second arc combination piece combination installation, two arc wide body sealing piece can carry out annular combination sealing to piston rod, when replacing arc wide body sealing piece in later period, only need to take out the combination sealing cover installation box, separate first arc combination piece and second arc combination piece, then can replace arc wide body sealing piece, when installation uses, the cooperation of fixed assembly and reinforced sealing assembly can ensure the installation stability of installation box and the reinforced sealing of joint place after installation box installation, improve the connection sealing quality.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a combined sealing mechanism and piston pump. Background Technology

[0002] A piston pump is a positive displacement pump that relies on the reciprocating motion of a piston in a pump cylinder to change the working volume, thereby realizing the intake and discharge of fluid. Its core working principle is to drive the piston to move back and forth through a power mechanism to continuously transport fluid. Depending on the application scenario, the structural features of piston pumps will vary. In the case of vertical piston pumps, a sealing structure is required to seal the reciprocating movement of the piston rod. Existing sealing methods mostly use a sealing gland and a sealing ring for compression sealing. Since the piston rod needs to reciprocate frequently, the sealing ring is a consumable part. When the sealing ring needs to be replaced, it is often necessary to disassemble the drive mechanism connected to the piston rod before the sealing ring can be replaced, which is cumbersome and inconvenient. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a combined sealing mechanism and piston pump, which solves the related technical problems raised in the background art.

[0004] To achieve the above objectives, this utility model provides a combined sealing mechanism, comprising: The piston cylinder has a mounting box installed at its upper end via a flange. A combined sealing sleeve is installed inside the mounting box via a fixing assembly. The combined sealing sleeve includes a first arc-shaped combined block, a second arc-shaped combined block, and two arc-shaped wide-body sealing blocks. The first arc-shaped combined block and the second arc-shaped combined block are connected. The fixing assembly includes four fixing bolts. A reinforced sealing assembly is located at the lower end of the combined sealing sleeve insertion mounting box. The reinforced sealing assembly includes an open reinforced sealing sleeve and an L-shaped open sealing sleeve.

[0005] Optionally, the first arc-shaped combination block and the second arc-shaped combination block each have an embedded groove on one side of their inner arc. The two arc-shaped wide-body sealing blocks are elastically inserted into the two embedded grooves respectively, and the inner arc diameter of the arc-shaped wide-body sealing block is smaller than the inner arc diameter of the first arc-shaped combination block and the second arc-shaped combination block.

[0006] Optionally, both sides of the first arc-shaped assembly block and the second arc-shaped assembly block are respectively provided with mating threaded guide sleeves and recessed grooves. The mating threaded guide sleeves provided on the first arc-shaped assembly block are correspondingly provided with the recessed grooves provided on the second arc-shaped assembly block, and the mating threaded guide sleeves provided on the second arc-shaped assembly block are correspondingly provided with the recessed grooves provided on the first arc-shaped assembly block. A guide hole is provided through one side of the recessed groove, and the mating threaded guide sleeves are respectively provided through the guide hole.

[0007] Optionally, each of the sinking troughs is equipped with a combination bolt, one side of which is threaded into a guide hole and threadedly inserted into a threaded guide sleeve.

[0008] Optionally, the first arc-shaped assembly block and the second arc-shaped assembly block are respectively provided with two constraint grooves on the outer periphery of the insertion and mounting box. One side of the constraint groove is set as an inclined surface. The side of the mounting box near the constraint groove is provided with a fixing bolt inserted through the inclined bolt. One side of the fixing bolt is inserted into the constraint groove and abuts against the inclined surface. The constraint groove and the sinking groove are staggered.

[0009] Optionally, the two arc-shaped wide-body sealing blocks are combined to form a ring structure. A piston rod is inserted through the center of the ring structure formed by the two arc-shaped wide-body sealing blocks, and the lower end of the piston rod passes through the mounting box and is inserted into the piston cylinder.

[0010] Optionally, the first arc-shaped assembly block and the second arc-shaped assembly block are both provided with a tapered downward pressure groove at the lower end of the inner arc side near the piston rod. The open reinforcing sealing sleeve is fitted onto the piston rod. The upper side of the open reinforcing sealing sleeve contacts the lower side of the two arc-shaped wide-body sealing blocks, and the outer periphery of the open reinforcing sealing sleeve is inserted into the tapered downward pressure groove.

[0011] Optionally, the L-shaped opening sealing sleeve is fitted onto the lower end of the annular structure composed of the first arc-shaped combined block and the second arc-shaped combined block. The lower end of the L-shaped opening sealing sleeve is pressed and sealed against the lower side of the mounting box. The opening positions of the opening reinforced sealing sleeve and the L-shaped opening sealing sleeve are offset from the joint positions of the two arc-shaped wide-body sealing blocks.

[0012] One of the above technical solutions has the following advantages or beneficial effects: This device designs the combined sealing sleeve as a combination structure of a first arc-shaped combined block and a second arc-shaped combined block. Inside the combined sealing sleeve composed of the first and second arc-shaped combined blocks, a wide-sized arc-shaped wide-body sealing block is also designed to match it. After the first and second arc-shaped combined blocks are installed, the two arc-shaped wide-body sealing blocks can provide a ring-shaped combined seal for the piston rod. When replacing the arc-shaped wide-body sealing block later, simply remove the combined sealing sleeve from the mounting box, separate the first and second arc-shaped combined blocks, and then replace the arc-shaped wide-body sealing block. During installation and use, the cooperation between the fixing component and the reinforcing sealing component can ensure the stability of the mounting box installation and the enhanced seal at the joint after the mounting box is installed, thereby improving the connection sealing quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side sectional view of the present invention. Figure 3 This utility model Figure 2 Schematic diagram of part A; Figure 4 This is a schematic diagram of the disassembled structure of the mounting box of this utility model; Figure 5 This utility model Figure 4 Schematic diagram of part B.

[0014] In the diagram: 1. Piston cylinder; 2. Mounting box; 3. First arc-shaped assembly block; 4. Second arc-shaped assembly block; 5. Butt threaded guide sleeve; 6. Sinking groove; 7. Combination bolt; 8. Embedded groove; 9. Arc-shaped wide-body sealing block; 10. Piston rod; 11. Conical pressing groove; 12. Opening reinforced sealing sleeve; 13. L-shaped opening sealing sleeve; 14. Constraint groove; 15. Fixing bolt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figure 1-2This utility model embodiment provides a combined sealing mechanism, including a piston cylinder 1. An mounting box 2 is installed on the upper end of the piston cylinder 1 via a flange. A combined sealing sleeve is provided inside the mounting box 2 via a fixing assembly. A sealing ring is provided at the flange connection position between the piston cylinder 1 and the mounting box 2. The combined sealing sleeve includes a first arc-shaped combined block 3, a second arc-shaped combined block 4, and two arc-shaped wide-body sealing blocks 9. The first arc-shaped combined block 3 and the second arc-shaped combined block 4 are connected. An embedded groove 8 is provided on one side of the inner arc of both the first arc-shaped combined block 3 and the second arc-shaped combined block 4. The two arc-shaped wide-body sealing blocks 9 are elastically inserted into the two embedded grooves 8, and the diameter of the inner arc side of the arc-shaped wide-body sealing block 9 is smaller than the diameter of the inner arc side of the first arc-shaped combined block 3 and the second arc-shaped combined block 4. The two arc-shaped wide-body sealing blocks 9 are arranged in a ring structure. The piston rod 10 is inserted through the center of the ring structure formed by the two arc-shaped wide-body sealing blocks 9. The lower end of the piston rod 10 passes through the mounting box 2 and is inserted into the piston cylinder 1. The combined sealing sleeve is a combination structure of the first arc-shaped combination block 3 and the second arc-shaped combination block 4. When it is necessary to replace the internal arc-shaped wide-body sealing block 9, the first arc-shaped combination block 3 and the second arc-shaped combination block 4 can be directly disassembled without disassembling the drive control mechanism of the piston rod 10, which improves the replacement and maintenance efficiency of the arc-shaped wide-body sealing block 9. The arc-shaped wide-body sealing block 9 achieves the sealing at the joint under its own elasticity. At the same time, with its own elasticity, it wraps the outer side of the piston rod 10, realizing the sealing effect of the piston rod 10 moving up and down.

[0017] Both sides of the first arc-shaped assembly block 3 and the second arc-shaped assembly block 4 are respectively provided with mating threaded guide sleeves 5 and recessed grooves 6. The mating threaded guide sleeves 5 on the first arc-shaped assembly block 3 are correspondingly provided with the recessed grooves 6 on the second arc-shaped assembly block 4, and the mating threaded guide sleeves 5 on the second arc-shaped assembly block 4 are correspondingly provided with the recessed grooves 6 on the first arc-shaped assembly block 3. A guide hole is opened through one side of each recessed groove 6, and the mating threaded guide sleeves 5 are respectively inserted through the guide hole. A combination of [unclear - possibly a type of assembly] is inserted into each recessed groove 6. Bolt 7, one side of the combination bolt 7 is placed in the guide hole through the thread and is threadedly inserted into the threaded guide sleeve 5. In use, first insert the two arc-shaped wide-body sealing blocks 9 into the inner grooves 8 of the first arc-shaped combination block 3 and the second arc-shaped combination block 4 respectively. Then, insert the threaded guide sleeve 5 and the recessed groove 6 of the first arc-shaped combination block 3 and the second arc-shaped combination block 4 respectively. Tighten the combination bolt 7 to fix the first arc-shaped combination block 3 and the second arc-shaped combination block 4, so as to realize the compression sealing of the arc-shaped wide-body sealing block 9.

[0018] like Figure 3-5As shown, the fixing assembly includes four fixing bolts 15. The first arc-shaped combination block 3 and the second arc-shaped combination block 4 are inserted into the outer periphery of the mounting box 2, and two constraint grooves 14 are respectively opened. One side of the constraint groove 14 is set as an inclined surface. The mounting box 2 near the constraint groove 14 is provided with fixing bolts 15 inserted obliquely through the bolts. One side of the fixing bolt 15 is inserted into the constraint groove 14 and abuts against the inclined surface. The constraint groove 14 and the sinking groove 6 are offset from each other. After the first arc-shaped combination block 3 and the second arc-shaped combination block 4 are assembled, the combined sealing sleeve is inserted into the mounting box 2 along the piston rod 10. Then, when the four fixing bolts 15 are tightened diagonally in sequence, the four fixing bolts 15 press down on the combined sealing sleeve under the action of the inclined structure. At the same time, the fixing bolts 15 are inserted into the constraint groove 14 to limit the up and down and rotational movement of the combined sealing sleeve, thereby realizing the installation and fixing of the combined sealing sleeve.

[0019] A reinforced sealing component is provided to reinforce the seal at the connection between the combined sealing sleeve and the mounting box 2. The reinforced sealing component is located at the lower end of the combined sealing sleeve inserted into the mounting box 2. The reinforced sealing component includes an open reinforced sealing sleeve 12 and an L-shaped open sealing sleeve 13. The lower end of the inner arc side of the first arc-shaped combined block 3 and the second arc-shaped combined block 4 near the piston rod 10 is provided with a conical downward pressure groove 11. The open reinforced sealing sleeve 12 is fitted onto the piston rod 10. The upper side of the open reinforced sealing sleeve 12 contacts the lower side of the two arc-shaped wide-body sealing blocks 9, and the outer circumference of the open reinforced sealing sleeve 12 is inserted into the conical downward pressure groove 11. After the open reinforced sealing sleeve 12 is fitted onto the piston rod 10, it provides the first seal for the movable joint of the piston rod 10. The annular sealing ring formed by the combination of the two arc-shaped wide-body sealing blocks 9 is the second seal.

[0020] L-shaped opening sealing sleeve 13 is fitted onto the lower end of the annular structure formed by the first arc-shaped combined block 3 and the second arc-shaped combined block 4. The lower end of L-shaped opening sealing sleeve 13 is pressed and sealed against the lower inner side of the mounting box 2. The opening positions of the opening reinforced sealing sleeve 12 and L-shaped opening sealing sleeve 13 are misaligned with the joint positions of the two arc-shaped wide-body sealing blocks 9. The L-shaped opening sealing sleeve 13 is designed to prevent the material inside the piston cylinder 1 from leaking from the joint between the mounting box 2 and the combined sealing sleeve after breaking through the first seal of the opening reinforced sealing sleeve 12. It is the second seal between the combined sealing sleeve and the mounting box 2. Furthermore, the misalignment of the opening joint of the opening reinforced sealing sleeve 12 with the joint of the arc-shaped wide-body sealing block 9 allows for better sealing through elastic deformation when the combined sealing sleeve presses down and squeezes the opening reinforced sealing sleeve 12 and L-shaped opening sealing sleeve 13.

[0021] A piston pump with the above-mentioned combined sealing mechanism is also proposed. When the piston pump of this design is installed and used, the cooperation between the fixing component and the reinforced sealing component can ensure the installation stability of the mounting box 2 and the reinforced sealing of the joint after the mounting box 2 is installed.

[0022] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A combined sealing mechanism, characterized in that, include: Piston cylinder (1), the upper end of piston cylinder (1) is equipped with mounting box (2) through flange, and the mounting box (2) is equipped with combined sealing sleeve through fixing component. The combined sealing sleeve includes first arc-shaped combined block (3), second arc-shaped combined block (4) and two arc-shaped wide-body sealing blocks (9). The first arc-shaped combined block (3) and the second arc-shaped combined block (4) are connected. The fixing component includes four fixing bolts (15). The reinforced sealing assembly is located at the lower end of the combined sealing sleeve insertion mounting box (2). The reinforced sealing assembly includes an open reinforced sealing sleeve (12) and an L-shaped open sealing sleeve (13).

2. The combined sealing mechanism according to claim 1, characterized in that, The first arc-shaped combination block (3) and the second arc-shaped combination block (4) are provided with an embedded groove (8) on one side of the inner arc. The two arc-shaped wide-body sealing blocks (9) are elastically inserted into the two embedded grooves (8) respectively, and the inner arc diameter of the arc-shaped wide-body sealing block (9) is smaller than the inner arc diameter of the first arc-shaped combination block (3) and the second arc-shaped combination block (4).

3. The combined sealing mechanism according to claim 2, characterized in that, Both sides of the first arc-shaped assembly block (3) and the second arc-shaped assembly block (4) are respectively provided with a threaded guide sleeve (5) and a recessed groove (6). The threaded guide sleeve (5) provided on the first arc-shaped assembly block (3) is correspondingly provided with the recessed groove (6) provided on the second arc-shaped assembly block (4). The threaded guide sleeve (5) provided on the second arc-shaped assembly block (4) is correspondingly provided with the recessed groove (6) provided on the first arc-shaped assembly block (3). A guide hole is provided through one side of the recessed groove (6), and the threaded guide sleeve (5) is respectively inserted into the guide hole.

4. The combined sealing mechanism according to claim 3, characterized in that, Each of the sinking troughs (6) is equipped with a combination bolt (7). One side of the combination bolt (7) is placed in the guide hole through a thread and threadedly inserted into the threaded guide sleeve (5).

5. The combined sealing mechanism according to claim 4, characterized in that, The first arc-shaped assembly block (3) and the second arc-shaped assembly block (4) are respectively provided with two constraint grooves (14) on the outer periphery of the mounting box (2). One side of the constraint groove (14) is set as an inclined surface. The mounting box (2) near the constraint groove (14) is provided with a fixing bolt (15) inserted through the bolt at an incline. One side of the fixing bolt (15) is inserted into the constraint groove (14) and abuts against the inclined surface. The constraint groove (14) and the sinking groove (6) are offset from each other.

6. The combined sealing mechanism according to claim 5, characterized in that, The two arc-shaped wide-body sealing blocks (9) are combined to form a ring structure. A piston rod (10) is inserted through the center of the ring structure formed by the two arc-shaped wide-body sealing blocks (9). The lower end of the piston rod (10) passes through the mounting box (2) and is inserted into the piston cylinder (1).

7. The combined sealing mechanism according to claim 6, characterized in that, The first arc-shaped combination block (3) and the second arc-shaped combination block (4) are provided with conical downward pressure grooves (11) on the lower end of the inner arc side near the piston rod (10). The open reinforcing sealing sleeve (12) is sleeved on the piston rod (10). The upper side of the open reinforcing sealing sleeve (12) contacts the lower side of the two arc-shaped wide-body sealing blocks (9), and the outer periphery of the open reinforcing sealing sleeve (12) is inserted into the conical downward pressure groove (11).

8. The combined sealing mechanism according to claim 7, characterized in that, The L-shaped opening sealing sleeve (13) is fitted onto the lower end of the annular structure composed of the first arc-shaped combination block (3) and the second arc-shaped combination block (4). The lower end of the L-shaped opening sealing sleeve (13) is pressed and sealed against the lower inner side of the mounting box (2). The opening positions of the opening reinforced sealing sleeve (12) and the L-shaped opening sealing sleeve (13) are misaligned with the joint positions of the two arc-shaped wide-body sealing blocks (9).

9. A piston pump, characterized in that: The piston pump includes the combined sealing mechanism described in any one of claims 1-8.

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