Water loom water pump seal

Abstract

The utility model discloses a water weaving machine water pump sealing device belongs to water pump sealing technical field, and the opening of connecting head and base is connected with the outer sleeve, and the both ends of outer sleeve are connected with the outer ring, and the inner end of outer sleeve is installed with the inner support frame, and the end face opening of inner support frame is equipped with the expansion spring, and the both ends of expansion spring are equipped with the expansion torus, and the inner ring place of two outer rings is connected with the expansion type inner sealing cover, and the expansion torus is ejected through the expansion spring, and is extruded expansion type inner sealing cover. The close -fitting sealing mechanism and the inner hole sealing mechanism are through the synergic mode of " mechanical seal + static seal + dynamic seal + packing seal", and form multilayer, all -round sealing system. The close -fitting sealing mechanism provides basic axial seal, and the inner hole sealing mechanism is from static, dynamic and the packing filling multidimensional reinforcement inner hole sealing, not only covers the sealing demand of axial and radial, but also can adapt to assembly error, working condition pressure change and sealing surface wear etc. Complex situation.

Description

Technical Field

[0001] This utility model relates to the field of water pump sealing technology, and in particular to a water pump sealing device for a water loom. Background Technology

[0002] The water pump for a water jet loom (usually referring to a high-pressure water pump for a water jet loom) is a key component that provides a high-pressure water flow to the nozzles of the water jet loom to achieve weft insertion. The main type is the high-pressure plunger pump, which consists of a pump body, plunger, suction valve, discharge valve, and drive mechanism (such as a cam / eccentric wheel). Its working principle is that the plunger reciprocates within the pump body, and in conjunction with the alternating opening and closing of the suction and discharge valves, pressurizes the water and delivers it to the nozzles, forming a high-speed water flow that pulls the weft yarn.

[0003] Sealing devices are used to prevent high-pressure water leakage and the intrusion of external impurities within the pump. They are divided into dynamic and static seals: dynamic seals are located at the interface between the plunger and the pump body, commonly using V-rings, U-rings, or combination seals (such as Step seals). The materials are mostly nitrile rubber or fluororubber, combining elasticity and wear resistance to adapt to high-speed reciprocating motion. Static seals are fixed mating surfaces such as the pump cover and pump body, and valve seat and pump body, using rubber or metal gaskets for sealing. Sealing devices ensure stable pressure within the pump, reduce leakage and component wear, and ensure efficient weft insertion and normal loom operation.

[0004] Currently, in the sealing devices of water pumps for water looms, when axial sealing is achieved using springs and sealing covers, the springs are prone to elastic fatigue due to long-term alternating loads, leading to a decrease in preload and insufficient pressure between the sealing cover and the sealing surface. Simultaneously, under the rotation or vibration of the shaft, the sealing surface of the sealing cover continuously rubs against the mating parts, easily causing surface wear and gap formation. When using sealing rings, the sealing rings are subject to long-term media erosion, temperature changes, and friction, resulting in material aging, elasticity failure, and thinning due to wear, making them unable to effectively fill the sealing gap. Both of these methods, over prolonged use, lead to loose sealing surfaces and decreased sealing pressure due to wear of the sealing components and a decline in preload / elasticity, ultimately resulting in reduced sealing performance and leakage problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a water pump sealing device for water looms, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A water pump sealing device for a water loom includes a connector, a base, a clamping spring, and a sealing connector cover. The connector is sleeved and connected to the tail of the base. The clamping spring is connected to the other end of the base and is connected to the sealing connector cover. The sealing connector cover and the water pump are sealed and clamped together by the clamping spring. An outer sleeve is connected to the opening of the connector and the base, and an outer ring is connected to both ends of the outer sleeve. An inner support frame is installed at the inner end of the outer sleeve, and an expansion spring is provided in the end face opening of the inner support frame. An expansion ring is provided at both ends of the expansion spring. An expansion inner sealing cover is connected to the inner ring of the two outer rings. The expansion rings are ejected by the expansion spring and squeeze the expansion inner sealing cover, thereby achieving a tight seal at the inner hole of the connector through the expansion inner sealing cover. The inner support frame, outer sleeve, expansion ring, and expansion inner sealing cover form a sealing packing chamber. The sealing packing chamber is filled with sealing packing, and the expansion ring drives the sealing packing and expansion inner sealing cover to expand outward, further improving the sealing performance.

[0007] As an optional solution of this utility model, the outer sleeve is welded and fixed to the outer ring, and a sealing ring is connected to the outer wall of the outer ring by an adhesive. The outer ring and the sealing ring are tightly pressed against the inner hole of the connector and the base, and the sealing is achieved there. As an optional solution of this utility model, the inner support frame is composed of two semi-circular rings, which together form a complete support ring. The side wall of the semi-circular ring is provided with a screw hole, which is aligned with the circular hole on the side wall of the outer sleeve. A bolt is inserted to fix the inner support frame and the outer sleeve. Multiple circular holes are distributed in a ring on both ends of the inner support frame. As an optional solution of this utility model, the expansion spring is embedded in the round hole of the inner support frame, the middle section of the expansion spring is fixed to the inner support frame by bolts, and the two ends of the expansion spring are connected to the expansion ring by bolts. As an optional solution of this utility model, the expansion ring is designed in a circular shape, and the edge of the expansion ring is connected to the inner wall of the expansion inner sealing cover by an adhesive. Multiple stabilizing blocks are distributed in a ring at both ends of the inner support frame. The stabilizing blocks are integrated with the inner support frame, and the inner top of the stabilizing blocks is provided with a baffle strip to limit the degree of expansion of the expansion ring. As an optional embodiment of this utility model, the sealing packing chamber is filled with sealing packing, which is any one or a mixture of aramid fiber packing, flexible graphite packing, and polytetrafluoroethylene packing.

[0008] Compared with the prior art, the present invention has the following beneficial effects: The elastic action of the retaining spring provides a continuous and stable axial preload to the sealing connector cover, ensuring it fits tightly against the pump interface and quickly forming a preliminary axial seal. This mechanism adapts to minor axial displacements or gap changes that may occur at the pump interface during assembly or operation, ensuring the sealing surfaces always maintain an effective fit.

[0009] The outer rings at both ends of the outer sleeve are coated with sealant and installed with sealing rings embedded in the connector and the inner hole of the base, achieving a static seal at the connection. This can stably prevent media leakage under non-working or low-pressure conditions. When the equipment is subjected to pressure or media, the expansion spring expands and pushes the expansion ring outward, squeezing the expansion inner sealing cover to cause radial expansion, making it tightly fit the inner hole wall of the connector, forming a dynamic seal that changes with the working conditions. This seal can adapt to minor unevenness or pressure fluctuations on the inner hole wall, significantly enhancing the dynamic adaptability of the orifice seal. At the same time, the outward movement of the expansion ring compresses the sealing packing material (such as aramid fiber, flexible graphite, and other materials with wear-resistant, temperature-resistant, and self-lubricating properties) in the sealing packing chamber, filling the gaps and further filling the micro-gaps on the sealing surface, improving the fit and sealing durability of the sealing surface. The stabilizing blocks at both ends of the inner support frame effectively limit the maximum displacement of the expansion ring through the inner baffles, preventing structural damage or sealing failure of the expansion inner sealing cover due to excessive expansion, and ensuring the long-term stable operation of the sealing mechanism.

[0010] The clamping sealing mechanism and the inner hole sealing mechanism work together through a synergistic approach of "mechanical seal + static seal + dynamic seal + packing seal" to form a multi-layered, comprehensive sealing system. The clamping sealing mechanism provides basic axial sealing, while the inner hole sealing mechanism enhances the inner hole seal from multiple dimensions, including static, dynamic, and packing filling. This not only covers axial and radial sealing requirements but also adapts to complex situations such as assembly errors, changes in operating pressure, and wear of the sealing surface. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is an exploded view of the overall structure of this utility model; Figure 4 This is an exploded view of the inner hole sealing mechanism of this utility model; Figure 5 This is a cross-sectional view of the internal hole sealing mechanism of this utility model.

[0012] In the diagram: 1. Connector; 2. Base; 3. Clamping spring; 4. Sealing connector cover; 5. Outer sleeve; 6. Outer ring; 7. Inner support frame; 8. Expansion spring; 9. Expansion ring; 10. Stabilizing block; 11. Sealing packing compartment; 12. Expansion inner sealing cover. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] like Figure 1 - Figure 5 As shown, the water pump sealing device for a water loom mainly consists of a connector 1, a base 2, a retaining spring 3, and a sealing connecting cover 4. The connector 1 is fitted and fixed to the tail of the base 2, while the retaining spring 3 is connected to the other end. The other end of the spring is connected to the sealing connecting cover 4. Through the elastic action of the retaining spring 3, the sealing connecting cover 4 can tightly abut against the water pump interface, forming a preliminary axial seal.

[0015] Inside the openings of connector 1 and base 2, an outer sleeve 5 is installed, with an outer ring 6 welded to each end. The outer wall of the outer ring 6 is coated with sealant and fitted with a sealing ring, allowing it to fit tightly into the inner holes of connector 1 and base 2, achieving a static seal at the connection. Inside the outer sleeve 5, an inner support frame 7 is installed. This inner support frame 7 is formed by the mating of two semi-circular ring blocks, with corresponding screw holes on its side. Bolts are passed through the corresponding circular holes on the side wall of the outer sleeve 5 for fixation, ensuring that the inner support frame 7 is stably placed inside the sleeve.

[0016] An expansion spring 8 is installed in the end face opening of the inner support frame 7. The middle section of the spring is fixed to the inner support frame 7 by bolts, and each end of the spring is connected to an expansion ring 9. The expansion ring 9 is designed to be circular, and its outer edge is bonded to the inner wall of the expansion inner sealing cover 12 by a high-strength adhesive. In the non-operating state, the expansion spring 8 remains in a contracted state; when subjected to pressure or the action of a medium, the spring expands, pushing the expansion ring 9 outward.

[0017] An expansion-type inner sealing cover 12 is connected between the inner rings of the two outer rings 6. This sealing cover is usually made of elastic rubber or polyurethane material. When the expansion ring 9 is pushed outward by the spring force, it squeezes the expansion-type inner sealing cover 12, causing it to expand radially and thus fit tightly against the inner wall of the connector 1, achieving a dynamic seal at the orifice.

[0018] The inner support frame 7, outer sleeve 5, expansion ring 9, and expansion-type inner sealing cover 12 together form a closed sealing packing chamber 11. The chamber is filled with sealing packing material, which can be aramid fiber, flexible graphite, polytetrafluoroethylene, or mixtures thereof. These materials have good wear resistance, temperature resistance, and self-lubricating properties. When the expansion ring 9 moves outward, it not only pushes the inner sealing cover to expand but also compresses the sealing packing material, filling the gap and further improving the adaptability of the sealing surface and the durability of the seal.

[0019] To control the movement range of the expansion ring 9, the inner support frame 7 is also equipped with integrally formed stabilizing blocks 10 at both ends. The inner side of each block has a raised retaining strip, effectively limiting the maximum displacement of the expansion ring 9 and preventing excessive expansion that could lead to structural failure. This device, through a combination of mechanical and packing seals, significantly improves the sealing reliability and service life of the pump connection.

[0020] The base 2 is fitted with and fixed to the connector 1 at its tail end; the other end of the base 2 is connected to a retaining spring 3, and the other end of the retaining spring 3 is connected to a sealing connector 4, forming a preliminary axial sealing structure. The outer sleeve 5 has outer rings 6 welded to both ends. Sealant is applied to the outer wall of the outer rings 6 and a sealing ring is installed. The assembled outer sleeve 5 is then embedded into the inner holes of the connector 1 and the base 2 to achieve a static seal at the connection. Two semi-circular ring blocks are joined together to form an inner support frame 7, which is inserted from inside the outer sleeve 5. Bolts are passed through corresponding circular holes on the side wall of the outer sleeve 5 and connected to the threaded holes on the side of the inner support frame 7, fixing the inner support frame 7 inside the outer sleeve 5.

[0021] An expansion spring 8 is installed in the opening on the end face of the inner support frame 7. The middle section of the expansion spring 8 is fixed to the inner support frame 7 by bolts, and its two ends are connected to expansion rings 9 respectively. The outer edge of the expansion ring 9 is bonded to the inner wall of the expansion inner sealing cover 12 with high-strength adhesive, and the expansion inner sealing cover 12 is connected between the inner rings of the two outer connecting rings 6. The inner support frame 7, the outer connecting sleeve 5, the expansion rings 9 and the expansion inner sealing cover 12 together form a sealing filler chamber 11, which is filled with sealing filler (aramid fiber, flexible graphite, polytetrafluoroethylene or a mixture thereof). The stabilizing blocks 10 (with raised baffles on the inner side) integrally formed at both ends of the inner support frame 7 are naturally formed, completing the overall assembly.

[0022] When the equipment is working, the sealing connection cover 4 is tightly pressed against the water pump interface under the elastic action of the clamping spring 3, forming a preliminary axial seal. When subjected to pressure or medium, the expansion spring 8 expands from the contracted state, pushing the expansion ring 9 to move outward, squeezing the expansion inner sealing cover 12 to cause it to expand radially, tightly fitting the inner wall of the connector 1, and achieving dynamic sealing of the orifice. At the same time, the expansion ring 9 moves outward to compress the sealing packing in the sealing packing chamber 11, filling the gap and improving the sealing adaptability and durability. The stabilizing blocks 10 at both ends of the inner support frame 7 limit the maximum displacement of the expansion ring 9 through the inner side baffles, preventing excessive expansion from causing structural failure.

[0023] When the expansion spring 8 is in a contracted state, the expansion ring 9 is not under thrust, and the expansion inner sealing cover 12 does not expand radially. The equipment is subjected to pressure or a medium. The expansion spring 8 expands, and its two ends push the expansion ring 9 to move axially outward. Under the thrust of the expansion spring 8, the expansion ring 9 moves outward. Because its outer edge adheres to the inner wall of the expansion inner sealing cover 12, the expansion inner sealing cover 12 is compressed, causing radial expansion and tightly fitting against the inner wall of the connector 1. Simultaneously, the expansion ring 9 moves outward, compressing the sealing packing in the sealing packing chamber 11, filling the gaps and enhancing the sealing effect. The expansion ring 9 moves to the stop bars inside the stabilizing blocks 10 at both ends of the inner support frame 7, where it is blocked by the stop bars, limiting maximum displacement and preventing excessive expansion.

[0024] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water pump sealing device for a water loom, comprising a connector (1), a base (2), a clamping spring (3), and a sealing connecting cover (4), wherein the base (2) is fitted with the connector (1) at its tail end, the clamping spring (3) is connected to the other end of the base (2), and the sealing connecting cover (4) is connected thereto, wherein the sealing connecting cover (4) and the water pump are sealed and clamped together by the clamping spring (3), characterized in that: An outer sleeve (5) is connected to the opening of the connector (1) and the base (2), and an outer ring (6) is connected to both ends of the outer sleeve (5). An inner support frame (7) is installed at the inner end of the outer sleeve (5), and an expansion spring (8) is provided in the end face opening of the inner support frame (7). An expansion ring (9) is provided at both ends of the expansion spring (8). An expansion inner sealing cover (12) is connected to the inner ring of the two outer rings (6). The expansion ring (9) pops out through the expansion spring (8) and squeezes the expansion inner sealing cover (12). The expansion inner sealing cover (12) achieves a tight seal at the inner hole of the connector (1). The inner support frame (7), outer sleeve (5), expansion ring (9) and expansion inner sealing cover (12) form a sealing packing chamber (11). The sealing packing chamber (11) is filled with sealing packing, and the expansion ring (9) drives the sealing packing and expansion inner sealing cover (12) to expand outward, further improving the sealing performance.

2. The water pump sealing device for a water loom according to claim 1, characterized in that: The outer sleeve (5) is welded and fixed to the outer ring (6). The outer wall of the outer ring (6) is connected with a sealing ring by an adhesive. The outer ring (6) and the sealing ring are tightly pressed against the inner hole of the connector (1) and the base (2) to achieve a seal.

3. The water pump sealing device for a water loom according to claim 2, characterized in that: The inner support frame (7) is composed of two semi-circular rings, which together form a complete support ring. The side wall of the semi-circular ring is provided with a screw hole, which is aligned with the circular hole on the side wall of the outer sleeve (5). A bolt is inserted to fix the inner support frame (7) and the outer sleeve (5). Multiple circular holes are distributed in a ring on both ends of the inner support frame (7).

4. The water pump sealing device for a water loom according to claim 3, characterized in that: The expansion spring (8) is embedded in the round hole of the inner support frame (7). The middle section of the expansion spring (8) is fixed to the inner support frame (7) by bolts. The two ends of the expansion spring (8) are connected to the expansion ring (9) by bolts.

5. The water pump sealing device for a water loom according to claim 4, characterized in that: The expansion ring (9) is designed in a circular shape, and the edge of the expansion ring (9) is connected to the inner wall of the expansion inner sealing cover (12) by adhesive. Multiple stabilizing blocks (10) are distributed in a ring at both ends of the inner support frame (7). The stabilizing blocks (10) are integrated with the inner support frame (7), and the inner top of the stabilizing blocks (10) is provided with a baffle to limit the degree of expansion of the expansion ring (9).

6. The water pump sealing device for a water loom according to claim 5, characterized in that: The sealed packing chamber (11) is filled with sealing packing, which is any one or a mixture of aramid fiber packing, flexible graphite packing, and polytetrafluoroethylene packing.

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