CN216854628U - Dish washer spray arm convenient to disassemble and assemble - Google Patents

Abstract

The utility model provides a dish-washing machine spray arm convenient to disassemble and assemble, which comprises a water delivery arm, a right-angle pipe, a snap ring, a joint, a spray arm upper shell and a spray arm lower shell, wherein the snap ring is sleeved on the right-angle edge of the right-angle pipe and is spliced by two semicircular semi-arc rings, the splicing edge of each semi-arc ring is provided with a clamping hook and a clamping port, the two semi-arc rings are in one-to-one corresponding clamping fit through the clamping hook and the clamping port, the top of the snap ring is convexly provided with an assembly flange, the maximum diameter of the assembly flange is larger than the diameter of the thickest pipe wall of the right-angle pipe, the periphery of the snap ring is sleeved with the joint, the top edge of the joint is abutted against the bottom surface of the assembly flange of the snap ring, the peripheral wall of the snap ring is concavely provided with a plurality of buckling grooves, the inner wall of the joint is convexly provided with a plurality of buckling grooves corresponding to the plurality of buckling grooves, the peripheral wall of the snap ring is concavely provided with a plurality of positioning grooves, and the inner wall of the joint is convexly provided with a plurality of elastic positioning ribs, the positioning ribs and the positioning grooves form one-to-one corresponding embedded clamping connection.

Description

Dish washer spray arm convenient to disassemble and assemble

Technical Field

The utility model belongs to the technical field of kitchen electricity, relates to a dish-washing machine component, and particularly relates to a dish-washing machine spray arm convenient to assemble and disassemble.

Background

The dish washer is used to automatically clean tableware such as dish, chopsticks, dish, knife and fork. The full-automatic dish washing machines on the market can be divided into two types of household and commercial, and the household full-automatic dish washing machines are only suitable for families and mainly comprise a cabinet type, a desk type, a water tank integrated type and an integrated type. The commercial dish washer can be divided into cabinet type, hood type, basket transmission type, belt transmission type and 5 types of ultrasonic wave according to the structure, thereby reducing the labor intensity of cooking personnel in restaurants, hotels and canteens of institutions, improving the working efficiency and promoting the cleanness and sanitation.

The washing principle of the current spray type dish washing machine is as follows: water flow is sprayed out of the holes in the spraying arms, water flow impacts tableware to wash the tableware, and meanwhile, the sprayed water flow drives the spraying arms to rotate so that the sprayed water flow is rotating water flow, the water flow washing area is increased, and the washing effect of the tableware is improved.

The upper spray arm of the existing dish washer has more water flow loss and larger water pressure loss due to poor sealing, thereby reducing the washing effect; meanwhile, the service life of the upper spray arm is shortened due to the fact that the upper spray arm is abraded quickly when rotating. The upper spray arm of the existing dish washer mostly provides the reverse force through the reverse force of the spraying or the bending of the spray arm. Therefore, the angle design of the spray arm is limited, and the defects of uneven rotation, unbalanced movement and the like of the spray arm exist. Most of the existing upper spray arms are formed by plastic, and the spray arms are easy to deform after running for a period of time in a dish washing machine, so that the rotation of the spray arms is influenced, and the failure of the spray arms is caused; the color of the spray arm is changed greatly, such as yellowing; secondly, plastic spray arms are not easy to clean. Therefore, the spray arm with the upper shell and the lower shell both made of stainless steel appears, but the snap ring required by the installation of the stainless steel spray arm is inconvenient to install and disassemble, so that further improvement and perfection are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a convenient and fast-to-disassemble and-assemble spraying arm of a dish washing machine, which is convenient to disassemble and assemble by bare hands by reasonably designing a clamping and matching structure of a clamping ring and a joint.

The purpose of the utility model can be realized by the following technical scheme: a dish washing machine spraying arm convenient to disassemble and assemble comprises a water delivery arm, a right-angle pipe, a clamping ring, a joint, a spraying arm upper shell and a spraying arm lower shell, wherein a plurality of nozzles are uniformly arranged on the shell wall of the spraying arm upper shell, the spraying arm upper shell and the spraying arm lower shell are buckled up to form a hollow spraying cavity, one side right-angle opening of the right-angle pipe is inserted into the water delivery arm, the other side right-angle opening is inserted into the spraying cavity, the clamping ring is sleeved on the right-angle edge of the right-angle pipe inserting spraying cavity, the clamping ring forms circumferential sliding connection around the circumferential wall of the right-angle pipe, the clamping ring is formed by splicing two semicircular half-arc rings into a bidirectional rotational symmetric structure, a clamping hook and a clamping opening are arranged on the splicing edge of the half-arc rings, the two half-arc rings are matched through the clamping hook and the clamping opening in one-to-one correspondence, an assembling flange is convexly arranged at the periphery of the top of the clamping ring, the largest diameter of the assembling flange is larger than the diameter of the thickest pipe wall of the right-angle pipe, the periphery of snap ring cup joints the joint, the top of joint is along supporting and leaning on the bottom surface of the assembly flange of snap ring, a plurality of catching grooves are established to the periphery wall of snap ring is concave upward, it is protruding to establish a plurality of buckles, a plurality of to correspond a plurality of catching grooves on the inner wall of joint the buckle with a plurality of the catching groove forms the one-to-one lock joint, it establishes a plurality of constant head tanks still to be concave upward on the periphery wall of snap ring, it is protruding to establish a plurality of elastic location ribs of having, a plurality of to correspond a plurality of constant head tanks on the inner wall of joint the location rib forms the one-to-one gomphosis joint, open the interface on the roof of spray arm epitheca, the bottom that connects inserts in the interface, the joint bottom sets up gradually open's water conservancy diversion mouth, the water conservancy diversion mouth is located spray the intracavity.

In this convenient dish washer spray arm of dismouting, spray arm epitheca and spray arm inferior valve all adopt stainless steel.

In the dishwasher spray arm convenient to disassemble and assemble, the bidirectional rotational symmetric structure of the snap ring comprises an upper part rotational symmetric structure and a lower part rotational symmetric structure which are formed after two half-arc rings are spliced, and a left side part rotational symmetric structure and a right side part rotational symmetric structure are formed simultaneously.

In the convenient dish washer spray arm of foretell dismouting, the positioning groove concave of snap ring is established on the cell wall lateral surface of catching groove, the positioning groove is the concave arc form, the location rib is protruding to be established the side of buckle, the location rib is the arc body.

In the above-described easy-to-mount/dismount dishwasher spray arm, the maximum diameter of the mounting flange is larger than the diameter of the joint.

In the convenient dish washer spray arm of foretell dismouting, the right angle limit that the chamber was sprayed in the grafting of right angle pipe has upper limit step and lower limit step, form the installation annular between upper limit step and the lower limit step, the snap ring card cover is in the installation annular, the assembly flange at snap ring top with upper limit step forms spacing support and leans on, the end opening of snap ring with lower limit step forms spacing support and leans on.

In the convenient dish washer spray arm of foretell dismouting, the water conservancy diversion mouth is in the tip of connecting outwards buckles 90 and sets up, the back-off edge is established to protruding on the periphery wall that connects, the interface of spray arm epitheca is located the water conservancy diversion mouth with form spacing joint between the back-off edge.

In the convenient dish washer spray arm of foretell dismouting, set up the water conservancy diversion subassembly that is rotational symmetry on the water conservancy diversion mouth, the water conservancy diversion subassembly includes that one guide plate and guide plate two, one guide plate has one section curved arc body one, two curved arc bodies and curved arc body three that are the connection of buckling of guide plate have, two laminating of curved arc body the passway edge that connects, curved arc body extends just to spray arm inferior valve lateral wall earlier on the spray arm lateral wall curved arc body three-dimensional sprays the chamber center pin and extends and form the water conservancy diversion direction that deflects, the water conservancy diversion direction that deflects with the lateral wall that sprays the chamber forms the recoil contained angle, the angle scope of recoil contained angle is 5 to 40.

In the dishwasher spray arm convenient to disassemble and assemble, each pair of the first guide plate and the second guide plate form a deflection guide direction on one side, the guide assembly comprises the first guide plate and the second guide plate, and the deflection guide directions on the two sides are arranged in a rotational symmetry manner.

The method for assembling the spraying arm of the dishwasher convenient to disassemble and assemble comprises the following steps:

1) inserting a right-angle port at one side of the right-angle pipe into the water delivery arm to finish the fixed connection and installation of the right-angle pipe and the water delivery arm;

2) the assembling flange is held by bare hands, the two separated semi-arc rings of the clamping ring are embedded into the mounting ring groove of the right-angle pipe from the side part, and the clamping hooks and the clamping openings of the two semi-arc rings are correspondingly clamped and matched one by one to form a complete clamping ring, so that the clamping ring is rotatably sleeved on the right-angle side of the right-angle pipe;

3) the joint extends upwards from the interface of the upper shell of the spray arm by bare hands, so that the flow guide port at the bottom end of the joint is clamped below the upper shell of the spray arm, the lower shell of the spray arm is buckled with the upper shell of the spray arm, and the flow guide port is positioned in a spraying cavity formed by buckling up and down;

4) the utility model discloses a spray arm, including the spray arm upper shell, the spray arm upper shell is equipped with the snap ring, the joint cup joints in the snap ring periphery, top edge until connecting supports on the bottom surface that leans on at snap ring assembly flange, the assembly flange that the snap ring was held between the fingers to one hand is fixed with it, the joint clockwise rotation is held between the fingers to the other hand, a plurality of buckles that make the joint correspond under the forward rotation and get into a plurality of catching grooves and form the joint, it corresponds a plurality of constant head tanks of embedding behind elastic deformation and forms elastic positioning to rotate forward a plurality of location ribs that further make the joint simultaneously, both cooperate and position the assembly in order to accomplish the accurate of joint and snap ring.

In the assembling method of the dishwasher spray arm convenient to disassemble and assemble, when the joint and the snap ring need to be disassembled, one hand holds the assembling flange of the snap ring to fix the assembly flange, the other hand holds the joint to rotate anticlockwise, so that a plurality of buckles of the joint gradually withdraw from a plurality of buckle grooves under the reverse rotation, and a plurality of positioning ribs of the joint are separated from a plurality of positioning grooves after elastic deformation during the reverse rotation so as to loosen the embedded fixation of the joint and the snap ring, and the joint can be pulled out.

Compared with the prior art, the dish washer spray arm convenient to disassemble and assemble has the following advantages:

1. the assembly flange is additionally arranged on the clamping ring and slightly protrudes out of the right-angle pipe and the joint, so that the force is pinched by hands in the installation operation, tools are omitted, the clamping ring and the joint are convenient to disassemble and assemble, and meanwhile, the abutting effect after the clamping ring and the joint are installed in place is realized through the assembly flange, so that the assembly is compact and stable; in addition, an elastic positioning clamping structure of the clamping ring and the joint is additionally arranged, so that the installation joint can rotate to the position, the yielding and positioning effects can be realized by utilizing elasticity, the installation is accurate, the elastic force is simple and easy to assemble and disassemble, the installation difficulty is generally reduced, and the assembly efficiency is improved.

2. Through the involute design of joint water conservancy diversion mouth, guide rivers are partial to the impact in order to increase spray arm reverse drive power, improve the holistic stability of spray arm, optimize the washing effect.

3. The rotary fixing ring of the spray arm adopts a bidirectional rotational symmetric structure, so that the fixing reliability, the sealing performance, the motion balance and the like of the spray arm are improved.

4. The spray arm upper shell and the spray arm lower shell which are made of stainless steel are adopted, so that the service life is prolonged, and the cleaning is facilitated.

Drawings

Fig. 1 is an exploded view of the spray arm of the dishwasher which is convenient to assemble and disassemble.

Fig. 2 is an assembly structure view of the spray arm of the dishwasher convenient for disassembly and assembly.

Fig. 3 is a flow guiding schematic diagram of the conveniently disassembled and assembled spray arm of the dishwasher.

Fig. 4 is a three-dimensional structure diagram of a snap ring in the spray arm of the dishwasher convenient for disassembly and assembly.

FIG. 5 is a multi-angle structure diagram of the joint in the spray arm of the dishwasher convenient for disassembly and assembly.

FIG. 6 is a sectional view of a first view of a part of the structure of the spray arm of the dishwasher convenient for disassembly and assembly.

Fig. 7 is a sectional view of the second partial structure view of the spray arm of the dishwasher convenient for disassembly and assembly.

In the figure, 1, a water conveying arm; 2. a right-angled tube; 2a, an upper limiting step; 2b, a lower limiting step; 3. a snap ring; 3a, a hook; 3b, a bayonet; 3c, assembling a flange; 3d, positioning a groove; 3e, buckling a groove; 4. a joint; 4a, an inverted edge; 4b, buckling; 4c, positioning ribs; 5. a flow guide port; 6. a first guide plate; 7. a second guide plate; 8. spraying arm upper shell; 9. a spray arm lower shell.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

As shown in figures 1 to 7, the dish washer spray arm convenient to disassemble and assemble comprises a water delivery arm 1, a right-angle pipe 2, a snap ring 3, a connector 4, a spray arm upper shell 8 and a spray arm lower shell 9, wherein a plurality of nozzles are uniformly arranged on the shell wall of the spray arm upper shell 8, the spray arm upper shell 8 and the spray arm lower shell 9 are buckled up and down to form a hollow spray cavity, a right-angle opening at one side of the right-angle pipe 2 is inserted into the water delivery arm 1, a right-angle opening at the other side is inserted into the spray cavity, the snap ring 3 is sleeved on the right-angle edge of the right-angle pipe 2 which is inserted into the spray cavity, the snap ring 3 forms circumferential sliding connection around the peripheral wall of the right-angle pipe 2, the snap ring 3 is formed into a two-way rotational symmetry structure by splicing two semicircular half-arc rings, the snap hooks 3a and the bayonet 3b are arranged on the splicing edge of the half-arc rings, the two half-arc rings are in one-to-one corresponding clamping fit through the snap hooks 3a and bayonet 3b, an assembly flange 3c is arranged at the top of the snap ring 3 in a protruding way to the periphery, the biggest diameter of assembly flange 3c is greater than the thickest wall diameter of right angle pipe 2, the periphery of snap ring 3 cup joints joint 4, the top edge that connects 4 leans on the bottom surface of the assembly flange 3c of snap ring 3, a plurality of catching grooves 3e are established to the peripheral wall of snap ring 3 is last concave, it is protruding to establish a plurality of buckles 4b to correspond a plurality of catching grooves 3e on the inner wall of joint 4, a plurality of buckles 4b form the one-to-one lock joint with a plurality of catching grooves 3e, it establishes a plurality of constant head tanks 3d still to be concave on the peripheral wall of snap ring 3, it has elastic location rib 4c to correspond a plurality of constant head tanks 3d are protruding to be established on the inner wall of joint 4, a plurality of location rib 4c and a plurality of constant head tanks 3d form the gomphosis joint of one-to-one, open the interface on the roof of spray arm upper shell 8, the bottom of joint 4 inserts in the interface, joint 4 bottom sets up involute water conservancy diversion mouth 5, water conservancy diversion mouth 5 is located sprays the intracavity.

In this convenient dish washer spray arm of dismouting, spray arm epitheca 8 and spray arm inferior valve 9 all adopt stainless steel.

The bidirectional rotational symmetry structure of the snap ring 3 comprises an upper portion rotational symmetry structure and a lower portion rotational symmetry structure which are formed after two half-arc rings are spliced, and a left side portion and a right side portion are simultaneously rotationally symmetric.

The positioning groove 3d of the snap ring 3 is concavely arranged on the outer side surface of the groove wall of the snap groove 3e, the positioning groove 3d is in a concave arc shape, the positioning rib 4c is convexly arranged at the side of the buckle 4b, and the positioning rib 4c is in an arc shape.

The maximum diameter of the fitting flange 3c is larger than the diameter of the joint 4.

The right-angle side that the chamber was sprayed in the grafting of right-angle pipe 2 has upper limit step 2a and lower limit step 2b, goes up and forms the mounting ring groove between limit step 2a and the lower limit step 2b, and 3 snap rings of snap ring are in the mounting ring groove, and the assembly flange 3c at 3 tops of snap ring forms spacing the support with upper limit step 2a and lean on, and the end opening of snap ring 3 forms spacing the support with lower limit step 2b and lean on.

The water conservancy diversion mouth 5 is outwards buckled 90 settings at the 4 tip of joint, and the periphery wall that connects 4 is protruding to be established the back-off and is followed, and the interface of spray arm upper shell 8 is located water conservancy diversion mouth 5 and forms spacing joint between the back-off and following 4 a.

The last setting of water conservancy diversion mouth 5 is rotational symmetry's water conservancy diversion subassembly, the water conservancy diversion subassembly includes first guide plate 6 and second guide plate 7, first guide plate 6 has one section curved arc body one, second guide plate 7 has curved arc body two and curved arc body three that are bending connection, curved arc body two laminating connects 4 the passway edge, the curved arc body sprays the chamber center pin to extend and curved arc body three-dimensional earlier on 9 lateral walls of spray arm inferior valve and extend and form the water conservancy diversion direction that deflects, the water conservancy diversion direction that deflects forms the recoil contained angle with the lateral wall that sprays the chamber, the angle scope of recoil contained angle is 5 to 40.

Each pair of the first guide plate 6 and the second guide plate 7 forms a deflection guide direction on one side, the guide assembly comprises the first guide plate 6 and the second guide plate 7, and the deflection guide directions on the two sides are arranged in a rotational symmetry mode.

The method for assembling the spraying arm of the dishwasher convenient to disassemble and assemble comprises the following steps:

1) inserting a right-angle port on one side of the right-angle pipe 2 into the water delivery arm 1 to complete the fixed connection and installation of the right-angle pipe 2 and the water delivery arm 1;

2) the assembling flange 3c is held by bare hands, the two separated half-arc rings of the snap ring 3 are embedded into the mounting ring groove of the right-angle pipe 2 from the side part, and the snap hooks 3a and the bayonet 3b of the two half-arc rings are correspondingly clamped and matched one by one to form the complete snap ring 3, so that the snap ring 3 is rotatably sleeved on the right-angle side of the right-angle pipe 2;

3) the joint 4 extends upwards from the interface of the spray arm upper shell 8 by bare hands, so that the flow guide port 5 at the bottom end of the joint 4 is clamped below the spray arm upper shell 8, the spray arm lower shell 9 is buckled with the spray arm upper shell 8, and the flow guide port 5 is positioned in a spray cavity formed by buckling up and down;

4) the joint 4 that will stretch out spray arm epitheca 8 cup joints in 3 peripheries of snap ring, until the top edge that connects 4 supports on the bottom surface that leans on at 3 assembly flange of snap ring 3c, the assembly flange 3c that the snap ring 3 was held between the fingers to one hand is fixed with it, another hand holds between the fingers joint 4 clockwise rotation, make a plurality of buckles 4b that connect 4 correspond under forward rotation and get into a plurality of catching grooves 3e and form the joint, further make a plurality of location ribs 4c that connect 4 correspond behind elastic deformation and imbed a plurality of constant head tanks 3d and form elastic positioning simultaneously forward rotation, both cooperate in order to accomplish the accurate assembly of locating of connecting 4 and snap ring 3.

When the connector 4 and the snap ring 3 need to be disassembled, the assembling flange 3c of the snap ring 3 is held by one hand to be fixed, the connector 4 is held by the other hand to rotate anticlockwise, the plurality of buckles 4b of the connector 4 gradually withdraw from the plurality of buckle grooves 3e under the reverse rotation, the plurality of positioning ribs 4c of the connector 4 are separated from the plurality of positioning grooves 3d after elastic deformation during the reverse rotation, the connector 4 and the snap ring 3 are fixed in an embedded mode, and the connector 4 can be pulled out.

Compared with the prior art, the dish washer spray arm convenient to disassemble and assemble has the following advantages:

1. the assembly flange 3c is additionally arranged on the clamping ring 3, and the assembly flange 3c slightly protrudes out of the right-angle pipe 2 and the joint 4, so that the clamping force is applied by hand in the installation operation, tools are omitted, the clamping ring 3 and the joint 4 are convenient to disassemble and assemble, and meanwhile, the abutting effect after the assembly flange 3c is installed in place is realized, so that the assembly is compact and stable; in addition, an elastic positioning clamping structure of the clamping ring 3 and the joint 4 is additionally arranged, so that the installation joint 4 can rotate in place, and the yielding and positioning effects can be realized by utilizing elasticity, so that the installation is accurate, the elastic force is simple and easy to assemble and disassemble, the installation difficulty is generally reduced, and the assembly efficiency is improved.

2. Through the involute design of the flow guide opening 5 of the joint 4, the water flow is guided to deviate from the impact so as to increase the reverse driving force of the spray arm, the integral stability of the spray arm is improved, and the washing effect is optimized.

3. The rotary fixing ring of the spray arm adopts a bidirectional rotational symmetric structure, so that the reliability, the sealing property, the motion balance and the like of the spray arm fixing are improved.

4. The spray arm upper shell 8 and the spray arm lower shell 9 which are made of stainless steel are adopted, so that the service life is prolonged, and the cleaning is convenient.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although the water transport arm 1 is used more here; a right-angle pipe 2; an upper limiting step 2 a; a lower limit step 2 b; a snap ring 3; a hook 3 a; a bayonet 3 b; a fitting flange 3 c; positioning a groove 3 d; a catching groove 3 e; a joint 4; a back-off edge 4 a; a buckle 4 b; positioning ribs 4 c; a flow guide port 5; a first guide plate 6; a second guide plate 7; a spray arm upper shell 8; the nozzle arm lower housing 9, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to the spirit of the present invention.

Claims (8)

1. A dish washing machine spraying arm convenient to disassemble and assemble comprises a water delivery arm, a right-angle pipe, a clamping ring, a joint, a spraying arm upper shell and a spraying arm lower shell, wherein a plurality of nozzles are uniformly arranged on the shell wall of the spraying arm upper shell, the spraying arm upper shell and the spraying arm lower shell are buckled up to form a hollow spraying cavity, one side right-angle opening of the right-angle pipe is inserted into the water delivery arm, the other side right-angle opening is inserted into the spraying cavity, the clamping ring is sleeved on the right-angle edge of the right-angle pipe inserting spraying cavity, the clamping ring forms circumferential sliding connection around the peripheral wall of the right-angle pipe, the clamping ring is formed by splicing two semicircular half-arc rings into a bidirectional rotational symmetric structure, a clamping hook and a clamping port are arranged on the splicing edge of the half-arc rings, the two half-arc rings are in one-to-one-corresponding clamping fit with the clamping hook and the clamping port, an assembling flange is convexly arranged at the top of the clamping ring to the periphery, the maximum diameter of the assembly flange is larger than the diameter of the thickest pipe wall of the right-angle pipe, the periphery of the snap ring is sleeved with the joint, the top edge of the joint is abutted against the bottom surface of the assembly flange of the snap ring, a plurality of catching grooves are concavely arranged on the peripheral wall of the snap ring, a plurality of buckles are convexly arranged on the inner wall of the joint corresponding to the plurality of buckle grooves, the plurality of buckles and the plurality of buckle grooves form one-to-one corresponding buckling connection, the peripheral wall of the snap ring is also concavely provided with a plurality of positioning grooves, the inner wall of the joint is convexly provided with a plurality of elastic positioning ribs corresponding to the plurality of positioning grooves, the plurality of positioning ribs and the plurality of positioning grooves form one-to-one corresponding embedded joint, the top wall of the upper spraying arm shell is provided with an interface, the bottom end of the connector is inserted into the interface, the bottom end of the connector is provided with an involute flow guide opening, and the flow guide opening is positioned in the spraying cavity.

2. The easy-to-disassemble and assemble dishwasher spray arm of claim 1, wherein the bi-directional rotational symmetric structure of the snap ring comprises two half-arc rings which are spliced to form an upper rotational symmetric structure and a lower rotational symmetric structure, and a left side portion and a right side portion are rotationally symmetric structures.

3. The easy-to-disassemble and assemble dishwasher spray arm of claim 1, wherein the positioning groove of the snap ring is recessed on the outer side of the groove wall of the snap ring, the positioning groove is in a concave arc shape, the positioning rib is convexly arranged at the side of the buckle, and the positioning rib is in an arc shape.

4. The ready-to-mount dishwasher spray arm of claim 1 wherein the maximum diameter of the mounting flange is greater than the diameter of the fitting.

5. The easy dismounting dishwasher spray arm according to claim 1, wherein the right-angle side of the right-angle pipe plugging spray cavity has an upper limit step and a lower limit step, an installation ring groove is formed between the upper limit step and the lower limit step, the snap ring is clamped in the installation ring groove, an assembly flange at the top of the snap ring forms a limit abutment with the upper limit step, and a bottom opening of the snap ring forms a limit abutment with the lower limit step.

6. The easy-to-disassemble and assemble dishwasher spray arm of claim 1, wherein the diversion port is bent outward at the end of the joint by 90 degrees, an inverted edge is convexly arranged on the peripheral wall of the joint, and the interface of the upper shell of the spray arm is positioned between the diversion port and the inverted edge to form a limit clamp.

7. The easy-to-disassemble and assemble spray arm of a dish washer according to claim 1, wherein a rotationally symmetrical guide assembly is arranged on the guide opening, the guide assembly comprises a first guide plate and a second guide plate, the first guide plate is provided with a first curved arc body, the second guide plate is provided with a second curved arc body and a third curved arc body which are connected in a bending mode, the second curved arc body is attached to the edge of the passage opening of the joint, the curved arc body extends towards the side wall of the lower shell of the spray arm and the central axis of the curved arc body three-way spray cavity extends to form a deflection guide direction, the deflection guide direction and the side wall of the spray cavity form a backflushing included angle, and the backflushing included angle ranges from 5 degrees to 40 degrees.

8. The easy-to-disassemble and assemble dishwasher spray arm of claim 7, wherein each pair of the first guide plate and the second guide plate forms a one-side deflection guide direction, the guide assembly comprises two pairs of the first guide plate and the second guide plate, and the two-side deflection guide directions are in rotational symmetry.

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