A hot-melt equipment for chlorinated polyvinyl chloride composite pipes

Abstract

The present invention relates to the technical field of hot-melt connection of pipes, and specifically to a hot-melt device for chlorinated polyvinyl chloride composite pipes, comprising a hot-melt welding machine, wherein the hot-melt welding machine comprises a clamping ring fixture and a V-groove fixture, wherein opposite sides of the clamping ring fixture and the V-groove fixture are both equipped with limiting units for limiting the depth of insertion of the pipe into a heating ring, and the two limiting units are staggered front and back, and a positioning unit for positioning the pipe end is installed on the limiting unit; the present invention is used for hot-melt connection of chlorinated polyvinyl chloride composite pipes, and the present invention can accurately control the insertion depth of the pipe during hot-melt connection, and at the same time, the present invention can also accurately control the insertion depth of two pipes during hot-melt connection, thereby ensuring the strength and sealing of the two pipes after hot-melt connection, and the present invention can also support the hot-melt plate so that the hot-melt plate is in a relatively stable static state, thereby ensuring that the pipes can be evenly hot-melted, thereby ensuring the hot-melt quality of the pipes.

Description

Technical Field

[0001] The invention relates to the technical field of pipe hot-melt connection, in particular to a chlorinated polyvinyl chloride composite pipe hot-melt device. Background Art

[0002] Chlorinated polyvinyl chloride composite pipes are new engineering plastic pipes made from chlorinated polyvinyl chloride resin through an extrusion molding process. Chlorinated polyvinyl chloride composite pipes are widely used in chemical industry, water supply and drainage and other fields due to their excellent corrosion resistance, high temperature resistance and mechanical strength. In pipeline engineering, socket-melt connection is a key link to ensure the sealing and structural integrity of the pipe system.

[0003] In the conventional method of hot-melt connection of pipes, two pipes are usually clamped on a hot-melt welding machine, and then the two pipes are controlled to be inserted into the hot-melt part of the hot-melt welding machine, so that the hot-melt part heat-melts the inner or outer sides of the ends of the two pipes. Then, the pipes are removed from the hot-melt part and the hot-melt welding machine is controlled to drive the two pipes to move synchronously and rapidly toward each other, so that the pipe with a smaller diameter is quickly inserted into the pipe with a larger diameter. After the hot-melt connection of the two pipes is completed, the hot-melt connected pipes are removed from the hot-melt welding machine, and the hot-melt connection of the pipes is completed.

[0004] The following problems may exist when hot-melt connecting pipes: 1. Pipe insertion depth control problem: When inserting the pipe into the hot-melt part, there is a lack of an effective insertion depth control mechanism, resulting in the inability to accurately control the insertion depth of the pipe. In particular, when connecting two hot-melt pipes, the inability to accurately control the insertion depth of the two pipes may lead to insufficient hot-melt strength at the pipe connection and reduced sealing performance.

[0005] 2. Stability of the hot melt section: When the hot melt section is hot-melting the two pipe ends, the hot melt section tends to sag under the action of gravity, and the operator needs to manually support it to maintain its position. However, manual support cannot ensure that the hot melt section is always in a stable static state, resulting in uneven heating of the pipe ends, affecting the quality and reliability of the hot melt connection. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: a chlorinated polyvinyl chloride composite pipe hot melt equipment, including a hot melt welding machine, the hot melt welding machine includes a clamp and a V-groove clamp, the clamp and the V-groove clamp are installed on opposite sides with limiting units for limiting the depth of the pipe inserted into the heating ring, and the two limiting units are staggered front and back, and the limiting units are installed with positioning units for positioning the pipe ends; the limiting units include a fixed plate fixedly installed on the opposite sides of the clamp and the V-groove clamp, a vertical plate is fixedly installed on the middle part of the upper side of the fixed plate, and limiting columns are distributed on opposite sides of the two vertical plates to limit An adjusting part is connected between the positioning column and the vertical plate, and a clamping rod is installed on the end of the limit column away from the vertical plate for sliding left and right through a clamping spring, and a locking assembly for locking the position of the clamping rod is installed on the end of the limit column away from the vertical plate; the positioning unit includes positioning plates distributed on the upper ends of the opposite sides of the two vertical plates, the positioning plates are connected to the vertical plates through a positioning part, and a transmission assembly is connected between the lower end of the positioning plate and the limiting column, and the transmission assembly is used to drive the positioning plate to move downward; an insertion distance positioning piece is installed at the right front end of the vertical plate on the left and at a position corresponding to the installation position of the positioning plate, and the insertion distance positioning piece is used to position the insertion depth of the two pipes.

[0007] Preferably, the locking assembly includes a plurality of circumferentially evenly arranged elastic locking rods radially slidably mounted on opposite sides of two limit columns, and the elastic locking rods are connected to the limit columns through connecting springs, and the back sides of the plurality of elastic locking rods and the side close to the middle of the hot melt welding machine are all set as inclined surfaces.

[0008] Preferably, the locking assembly also includes a linkage matching sleeve that is slidably installed on the opposite sides of the two limit columns. A plurality of circumferentially evenly arranged return springs are connected between the linkage matching sleeve and the limit columns, and the back sides of the two linkage matching sleeves are in contact with the corresponding plurality of elastic locking rod inclined surfaces.

[0009] Preferably, a plurality of circumferentially evenly arranged locking holes are opened at one end of the outer side of the clamping rod close to the middle of the hot melt welding machine, and the locking holes are used to cooperate with the elastic locking rod to lock the clamping rod, and the end of the clamping rod close to the middle of the hot melt welding machine is set to a high friction material.

[0010] Preferably, the transmission assembly includes a transmission plate distributed in the middle above the limiting column, the front and rear ends of the transmission plate are connected to the limiting column through a U-shaped plate, and the vertical section of the U-shaped plate is set as an elastic telescopic structure. The upper end of the transmission plate is slid left and right with an L-shaped transmission rod, and the horizontal section of the transmission rod is fixedly connected to the positioning plate.

[0011] Preferably, a square groove is provided at the lower end of the transmission plate, and matching grooves are provided inside the front and rear of the square groove. The end of the matching groove close to the middle of the hot melt welding machine is set as an inclined structure arranged downwardly, and the end of the matching groove away from the middle of the hot melt welding machine is set as a horizontal structure. A matching column block is slidably installed in the matching groove, and a square rod is fixedly installed on the two matching column blocks. The lower end of the square rod slides left and right to pass through the limit column and is fixedly connected to the end of the tightening rod away from the middle of the hot melt welding machine.

[0012] Preferably, the give-way member includes a give-way plate that is installed on the upper side of the vertical plate for sliding left and right, and the end of the give-way plate away from the middle of the hot melt welding machine slides left and right to pass through the vertical plate and is fixed with two fixed blocks that are symmetrically arranged up and down, and a buffer spring is connected between the fixed block and the vertical plate, and the positioning plate slides up and down to be installed at the end of the give-way plate close to the middle of the hot melt welding machine, and the lower end of the positioning plate slides up and down to pass through the give-way plate and is fixedly connected to its corresponding transmission rod.

[0013] Preferably, the insertion distance positioning member includes a square plate fixedly mounted on the right end of the vertical plate located on the left, and a positioning matching plate is mounted on the front end of the square plate so as to slide left and right via a plurality of guide springs.

[0014] Preferably, an L-shaped plate is installed at the position of the positioning plate corresponding to the rear end of the left side of the vertical plate on the left, a scale groove is opened on the front side of the square plate, and the left end of the L-shaped plate and the right end of the positioning matching plate correspond to the corresponding positioning plate positions.

[0015] Preferably, L-shaped connecting rods are installed on opposite sides of the upper ends of the two fixed plates for sliding left and right through extension springs, and a matching sleeve is fixedly installed on one end of the horizontal section of the connecting rod away from the fixed plate.

[0016] The beneficial effects of the present invention are: 1. The present invention positions the pipe end by setting a positioning unit, and at the same time, the present invention limits the depth of the pipe inserted into the heating ring by setting a limiting unit, thereby achieving precise control of the depth of the pipe inserted into the heating ring. At the same time, the present invention accurately controls the insertion depth of the two pipes when hot-melt connecting by setting an insertion distance positioning piece, thereby ensuring the strength and sealing of the hot-melt connection of the two pipes.

[0017] 2. The present invention sets a clamping rod to press against the hot melt plate under the action of a clamping spring, and the contact surface between the clamping rod and the hot melt plate is set to a high-friction material, so that the clamping rod can support the hot melt plate, so that the hot melt plate is in a relatively stable static state, ensuring that the pipe can be evenly melted, thereby ensuring the hot melt quality of the pipe.

[0018] 3. The present invention locks the position of the clamping rod by providing a locking assembly, so that the clamping rod can rigidly support the hot melt plate, thereby increasing the stability of the hot melt plate when hot melting the end of the pipe, and further improving the hot melting quality of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples.

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the limiting unit located on the left after a portion of the fixing plate is cut away according to the present invention.

[0022] Figure 3 It is a cross-sectional view of the structure of the limiting unit portion located on the left of the present invention.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the partial structure of the limiting unit after the limiting column is partially removed in the present invention.

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the transmission assembly after a portion of the transmission plate is cut away according to the present invention.

[0025] Figure 6 It is a front view of the insertion distance positioning member of the present invention.

[0026] Figure 7 This is a state diagram of the two limiting units when the two pipes begin to be hot-melt connected.

[0027] Reference numerals: 1, hot melt welding machine; 11, snap ring fixture; 12, V-groove fixture; 2, limiting unit; 21, fixing plate; 211, extension spring; 212, connecting rod; 213, matching sleeve; 22, vertical plate; 221, L-shaped plate; 23, adjusting member; 24, limiting column; 25, pressing spring; 26, pressing rod; 27, locking assembly; 271, elastic locking rod; 272, connecting spring; 273 , linkage matching sleeve; 274, return spring; 3, positioning unit; 31, positioning plate; 32, give way piece; 321, give way plate; 322, buffer spring; 33, transmission assembly; 331, transmission plate; 332, U-shaped plate; 333, transmission rod; 334, matching groove; 335, matching column block; 336, square rod; 4, insertion distance positioning piece; 41, square plate; 42, guide spring; 43, positioning matching plate. DETAILED DESCRIPTION

[0028] The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product instructions shall be followed.

[0029] See Figure 1A hot-melt device for chlorinated polyvinyl chloride composite pipes includes a hot-melt welding machine 1. The hot-melt welding machine 1 includes a snap ring clamp 11 and a V-groove clamp 12. The snap ring clamp 11 and the V-groove clamp 12 are both installed on opposite sides with limiting units 2 for limiting the hot-melt position of the pipe, and the two limiting units 2 are arranged front and back in an alternating manner. A positioning unit 3 for positioning the pipe end is installed on the limiting unit 2.

[0030] It should be noted that the hot melt welding machine 1 adopts the existing technology. The hot melt welding machine 1 also includes a welding machine base and a synchronizer. The snap ring clamp 11 and the V-groove clamp 12 are both installed on the welding machine base, and the snap ring clamp 11 is located on the left, and the V-groove clamp 12 is located on the right. At the same time, the synchronizer and the snap ring clamp 11 and the V-groove clamp 12 are connected. The synchronizer can control the snap ring clamp 11 and the V-groove clamp 12 to move synchronously inward and outward. A hot melt part is installed in the middle of the rear end of the welding seat. The hot melt part includes a hot melt plate and a heating ring. The heating ring is used to hot melt the inner or outer side of the end of the pipe.

[0031] It should be noted that both the snap ring clamp 11 and the V-groove clamp 12 can perform centering clamping on the pipe. The snap ring clamp 11 includes a slide No. 1 mounted on the welding machine base for sliding left and right. A snap ring portion is mounted on the upper end of the slide No. 1. The snap ring portion can clamp and fix pipes of different sizes by replacing fixed snap rings of different sizes. The V-groove clamp 12 includes a slide No. 2 mounted on the welding machine base for sliding left and right. A splint portion is mounted on the slide No. 2. The splint portion can clamp and fix pipes of different sizes by controlling two splints with V-grooves.

[0032] The present invention is used for hot-melt connection of chlorinated polyvinyl chloride composite pipes. The present invention can accurately control the insertion depth of the pipes during hot-melt connection, thereby ensuring the strength and sealing of the two pipes after hot-melt connection. Specifically, first, the two pipes are placed on the clamping ring clamp 11 and the V-groove clamp 12 respectively, and the positions of the pipes are manually adjusted so that the ends of the two pipes close to each other are moved to the corresponding positions of the positioning units 3. Then, the clamping ring clamp 11 and the V-groove clamp 12 are controlled to clamp and fix the corresponding pipes. Then, the limiting unit 2 is adjusted according to the depth of the pipe insertion into the heating ring. Then, the hot-melt plate is manually moved to the opposite sides of the two pipes so that the heating ring and the pipe are centered. Then, the synchronous parts are controlled to drive the clamping ring clamp 11 and the V-groove clamp 12 to move in the direction of approaching each other, so that the two pipes can be inserted into their corresponding heating rings, and the limiting unit 2 can limit the insertion depth of the heating ring into which the pipe is inserted, so that the heating ring hot-melts the pipe.

[0033] When the heating ring has completed the hot melting of the pipe, the synchronous parts are first controlled to drive the clamping ring clamp 11 and the V-groove clamp 12 to move away from each other, so that the pipe moves out of its corresponding heating ring, and then the hot melt plate is moved to the initial position. Finally, the synchronous parts are controlled to drive the clamping ring clamp 11 and the V-groove clamp 12 to move quickly towards each other, so that the pipe with a smaller diameter is quickly inserted into the pipe with a larger diameter. After waiting for the hot melting connection of the two pipes to be completed, the clamping ring clamp 11 and the V-groove clamp 12 are controlled to no longer clamp and fix the pipes, so that the two pipes after the hot melting connection can be removed.

[0034] See Figure 1-Figure 3 The limiting unit 2 includes a fixed plate 21 fixedly installed on the opposite sides of the snap ring clamp 11 and the V-groove clamp 12, a vertical plate 22 is fixedly installed on the middle part of the upper side of the fixed plate 21, and limiting columns 24 are distributed on the opposite sides of the two vertical plates 22. An adjusting member 23 is connected between the limiting column 24 and the vertical plate 22, and a clamping rod 26 is installed on the end of the limiting column 24 away from the vertical plate 22 for sliding left and right through a clamping spring 25. A locking assembly 27 for locking the position of the clamping rod 26 is installed on the end of the limiting column 24 away from the vertical plate 22, and the end of the clamping rod 26 close to the middle of the hot melt welding machine 1 is set to a material with high friction; wherein, the fixed plate 21 is fixedly installed on the opposite sides of the No. 1 slide and the No. 2 slide.

[0035] It should be noted that the adjusting member 23 in the present invention adopts an adjusting screw, which is connected to the vertical plate 22 through threaded cooperation, and the adjusting screw and the limit column 24 are rotatably connected on the side close to the vertical plate 22. By screwing the adjusting screw, the adjusting screw drives the limit column 24 to move left and right.

[0036] The limiting unit 2 is used to limit the depth of the pipe inserted into the heating ring; specifically, initially, the limiting column 24 is located at the extreme position close to the vertical plate 22. When the two pipes are moved toward one end close to each other to the corresponding position of the positioning unit 3, the end of the two pipes close to each other and the end of the two limiting columns 24 in the initial position close to each other are on the same horizontal plane. According to the depth of the pipe inserted into the heating ring, the adjusting part 23 drives the two limiting columns 24 to move one end distance in the direction of approaching each other.

[0037] When the control synchronization part drives the snap ring clamp 11 and the V-groove clamp 12 to move toward each other, the snap ring clamp 11 and the V-groove clamp 12 drive the two fixed plates 21 to move toward each other, so that the fixed plate 21 finally drives the two limit columns 24 to move toward each other through the vertical plate 22 and abut against the hot melt plate, so that the distance between the end of the pipe and the hot melt plate is equal to the distance between the end of the pipe and the end of the limit column 24 away from the vertical plate 22, thereby limiting the depth of the pipe inserted into the heating ring, and then being able to accurately control the depth of the pipe inserted into the heating ring, ensuring the strength and sealing of the two pipes after hot melt connection.

[0038] When the limiting column 24 is against the hot melt plate, its corresponding clamping rod 26 can be clamped against the hot melt plate first. As the two limiting columns 24 move toward each other, the clamping rod 26 moves relative to the limiting column 24 in the direction close to the vertical plate 22 under the blocking action of the hot melt plate and compresses the clamping spring 25. When the limiting column 24 is against the hot melt plate, the clamping rod 26 is clamped against the hot melt plate under the action of the clamping spring 25. At the same time, the locking assembly 27 locks the clamping rod 26, and the end of the clamping rod 26 close to the middle of the hot melt welding machine 1 is set to a material with high friction, so that the clamping rod 26 can support the hot melt plate, so that the hot melt plate is in a relatively stable static state, ensuring that the pipe can be evenly hot-melted, thereby ensuring the hot-melt quality of the pipe.

[0039] When the snap ring clamp 11 and the V-groove clamp 12 move away from each other, the snap ring clamp 11 and the V-groove clamp 12 drive the two fixed plates 21 to move away from each other, so that the fixed plate 21 finally drives the two limit columns 24 to move away from each other through the vertical plate 22. At the same time, the locking assembly 27 can automatically release the lock on the clamping rod 26, and the clamping rod 26 moves to the initial position under the action of the clamping spring 25.

[0040] See Figure 3 and Figure 4 The locking assembly 27 includes a plurality of circumferentially evenly arranged elastic locking rods 271 radially slidably mounted on opposite sides of the two limiting columns 24, and the elastic locking rods 271 are connected to the limiting columns 24 through connecting springs 272. The opposite sides of the plurality of elastic locking rods 271 and the side close to the middle of the hot melt welding machine 1 are all set as inclined surfaces.

[0041] See Figure 3 and Figure 4 The locking assembly 27 also includes a linkage matching sleeve 273 that is slidably installed on the opposite sides of the two limit columns 24. A plurality of circumferentially evenly arranged return springs 274 are connected between the linkage matching sleeve 273 and the limit column 24, and the opposite sides of the two linkage matching sleeves 273 are arranged in oblique contact with the corresponding plurality of elastic locking rods 271.

[0042] See Figure 4 A plurality of locking holes evenly arranged circumferentially are provided at one end of the outer side of the clamping rod 26 close to the middle of the hot melt welding machine 1 , and the locking holes are used to cooperate with the elastic locking rod 271 to lock the clamping rod 26 .

[0043] The locking assembly 27 is used to lock the position of the clamping rod 26; specifically, when the limiting column 24 rests on the hot melt plate, the linkage matching sleeve 273 can move relative to the limiting column 24 in the direction away from the hot melt plate under the action of the hot melt plate and compress the reset spring 274. At the same time, the linkage matching sleeve 273 and the elastic locking rod 271 inclined surface cooperate to drive multiple elastic locking rods 271 to move to the opposite side and compress the connecting spring 272, and the elastic telescopic ends on the opposite sides of the multiple elastic locking rods 271 can fit on the outside of the clamping rod 26.

[0044] When the clamping rod 26 drives the locking hole relative to the limit column 24 to move toward the direction close to the vertical plate 22 to the corresponding position of the elastic locking rod 271 under the blocking action of the hot melt plate, the elastic telescopic end of the elastic locking rod 271 is inserted into the corresponding locking hole to lock the position of the clamping rod 26. When the fixed plate 21 finally drives the two limit columns 24 to move away from each other through the vertical plate 22, the linkage matching sleeve 273 returns to its initial position toward the direction close to the hot melt plate under the action of the reset spring 274. At the same time, the elastic locking rod 271 moves out of the locking hole under the action of the connecting spring 272, thereby automatically releasing the position lock of the clamping rod 26.

[0045] See Figure 1 and Figure 2 The positioning unit 3 includes a positioning plate 31 distributed at the upper ends of the opposite sides of the two vertical plates 22. The positioning plate 31 is connected to the vertical plate 22 through a positioning piece 32. A transmission assembly 33 is connected between the lower end of the positioning plate 31 and the limiting column 24. The transmission assembly 33 is used to drive the positioning plate 31 to move downward; wherein, the ends of the two positioning plates 31 that are away from each other and the ends of the two limiting columns 24 in the initial position that are close to each other are on the same horizontal plane.

[0046] The positioning unit 3 is used to position the end of the pipe; specifically, when the pipe is placed on the clamping ring clamp 11 and the V-groove clamp 12, the position of the pipe is manually adjusted so that the ends of the two pipes that are close to each other are in contact with the ends of the two positioning plates 31 that are away from each other, so as to achieve the positioning of the end of the pipe, so that the ends of the two pipes that are close to each other and the ends of the two limit columns 24 that are in the initial position that are close to each other are on the same horizontal plane, and before the pipe is inserted into the heating ring, the positioning plate 31 can move downward under the action of the transmission assembly 33 and separate from the end of the pipe, so as not to interfere with the insertion of the pipe into the heating ring, and the positioning plate 31 can move left and right under the action of the giving way member 32, so that the positioning plate 31 after being separated from the end of the pipe can also move in the direction away from the hot melt plate, so that the pipe can be inserted into the heating ring at any insertion depth.

[0047] See Figure 2 、 Figure 3 and Figure 5 The transmission assembly 33 includes a transmission plate 331 distributed in the middle above the limiting column 24. The front and rear ends of the transmission plate 331 are connected to the limiting column 24 through a U-shaped plate 332, and the vertical section of the U-shaped plate 332 is set as an elastic telescopic structure. The upper end of the transmission plate 331 is slidably installed with an L-shaped transmission rod 333, and the horizontal section of the transmission rod 333 is fixedly connected to the positioning plate 31.

[0048] See Figure 3 and Figure 5 A square groove is provided at the lower end of the transmission plate 331, and matching grooves 334 are provided in the front and rear interiors of the square groove. The matching groove 334 is arranged to have an inclined structure with an end close to the middle of the hot melt welding machine 1 and an inclined structure with an end away from the middle of the hot melt welding machine 1. A matching column block 335 is slidably installed in the matching groove 334, and a square rod 336 is fixedly installed on the two matching column blocks 335. The lower end of the square rod 336 slides left and right through the limit column 24 and is fixedly connected to the end of the tightening rod 26 away from the middle of the hot melt welding machine 1.

[0049] When the locking plate 331 is unlocked, the locking plate 331 is unlocked and the locking plate 332 is unlocked, so that the locking plate 331 can be unlocked at the same time.

[0050] When the clamping rod 26 returns to its initial position, the clamping rod 26 drives the square rod 336 to return to its initial position. At the same time, under the action of the elastic telescopic structure of the U-shaped plate 332, the square rod 336 can drive the transmission plate 331 to move upward to its initial position under the cooperation of the matching column block 335 and the matching groove 334 inclined section, so that the transmission plate 331 drives the positioning plate 31 to move upward to its initial position through the transmission rod 333.

[0051] See Figure 2 and Figure 3 The give-way member 32 includes a give-way plate 321 that is slidably mounted on the upper side of the vertical plate 22. The end of the give-way plate 321 away from the middle of the hot melt welding machine 1 slides left and right through the vertical plate 22 and is fixed with two fixed blocks symmetrically arranged up and down, and a buffer spring 322 is connected between the fixed block and the vertical plate 22. The positioning plate 31 slides up and down and is mounted on the end of the give-way plate 321 close to the middle of the hot melt welding machine 1. The lower end of the positioning plate 31 slides up and down through the give-way plate 321 and is fixedly connected to its corresponding transmission rod 333.

[0052] The giving way piece 32 is used to enable the positioning plate 31 to move left and right; specifically, when the transmission rod 333 drives the positioning plate 31 to move downward and separate from the pipe end, the positioning plate 31 does not interfere with the insertion of the pipe on the heating ring, and when the depth of the pipe inserted into the heating ring is too deep, the giving way piece 321 can move relative to the standing plate 22 in the direction away from the hot melt plate under the blocking action of the hot melt plate and stretch the buffer spring 322, so that the pipe can be inserted into the heating ring at any insertion depth. When the pipe is removed from the heating ring, the giving way piece 321 drives the positioning plate 31 to return to its initial position under the action of the buffer spring 322.

[0053] See Figure 2An insertion distance positioning member 4 is installed at the right front end of the left vertical plate 22 and at a position corresponding to the installation position of the positioning plate 31. The insertion distance positioning member 4 is used to position the insertion depth of the two pipes.

[0054] See Figure 2 and Figure 6 The insertion distance positioning member 4 includes a square plate 41 fixedly mounted on the right end of the vertical plate 22 located on the left, and a positioning matching plate 43 is mounted on the front end of the square plate 41 so as to slide left and right through a plurality of guide springs 42.

[0055] See Figure 7 An L-shaped plate 221 is installed at the rear end of the left side of the vertical plate 22 on the left, corresponding to the position of the positioning plate 31. A scale groove is opened on the front side of the square plate 41, and the left end of the L-shaped plate 221 and the right end of the positioning matching plate 43 correspond to the positions of their corresponding positioning plates 31.

[0056] See Figure 2 The two fixed plates 21 have L-shaped connecting rods 212 installed on opposite sides of their upper ends through extension springs 211 for sliding left and right. The horizontal sections of the connecting rods 212 are fixedly installed with matching sleeves 213 on one end away from the fixed plates 21. The elastic force of the extension springs 211 is greater than the elastic force of the pressing springs 25.

[0057] The insertion distance positioning member 4 is used to position the hot-melt connection depth of the two pipes; specifically, when the pipes after hot melting are connected, the control synchronization member drives the clamping ring clamp 11 and the V-groove clamp 12 to move quickly in the direction of approaching each other, so that the two pipes move quickly in the direction of approaching each other, and at the same time, the clamping ring clamp 11 and the V-groove clamp 12 drive the matching sleeve 213 to move synchronously through the fixed plate 21. When the matching sleeve 213 on the left moves to the corresponding position of the clamping rod 26 on the right, the clamping rod 26 on the right can be inserted into the matching sleeve 213 on the left, and the matching sleeve 213 on the left can drive the clamping rod 26 on the right to move to the right, and then the clamping rod 26 on the right drives its corresponding positioning plate 31 downward through the transmission assembly 33, so that the positioning plate 31 on the right is separated from its corresponding pipe end. Similarly, the positioning plate 31 on the left moves downward and separates from its corresponding pipe end.

[0058] When the mating sleeve 213 on the left moves to the corresponding position of the limiting column 24 on the right, the limiting column 24 on the right can drive the mating sleeve 213 on the left to move to the left, so that the mating sleeve 213 on the left compresses the top spring 211 through its corresponding connecting rod 212. Similarly, the limiting column 24 on the left can drive the mating sleeve 213 on the right to move to the right, so that the two positioning plates 31 are always separated from their corresponding pipe ends, thereby not interfering with the hot melt connection of the two pipes.

[0059] Then continue to control the synchronous parts to drive the clamping ring clamp 11 and the V-groove clamp 12 to move quickly in the direction of approaching each other, and the left fixed plate 21 drives the L-shaped plate 221 to move through the vertical plate 22, and the right fixed plate 21 finally drives the positioning matching plate 43 to move through the vertical plate 22. When the two ends of the pipes close to each other move to the position where they start to connect, the left side of the positioning plate 31 on the left and the right side of the positioning plate 31 on the right are on the same horizontal plane, and at this time the L-shaped plate 221 and the positioning matching plate 43 are in contact, and then when the pipe with a smaller diameter is quickly inserted into the pipe with a larger diameter, the L-shaped plate 221 drives the positioning matching plate 43 to move and compress the guide spring 42, and by reading the scale groove degree of the square plate 41 corresponding to the positioning matching plate 43, the insertion depth of the two pipes during hot-melt connection is accurately controlled, further ensuring the strength and sealing of the two pipes after hot-melt connection.

[0060] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A chlorinated polyvinyl chloride composite pipe hot melt equipment, including a hot melt welding machine, the hot melt welding machine includes a clamping ring fixture and a V-groove fixture, characterized in that: The opposite sides of the clamping ring fixture and the V-groove fixture are both equipped with limiting units for limiting the depth of the pipe inserted into the heating ring, and the two limiting units are staggered in front and back. A positioning unit for positioning the pipe end is installed on the limiting unit; The limiting unit includes a fixing plate fixedly mounted on opposite sides of the snap ring clamp and the V-groove clamp, a vertical plate fixedly mounted on the middle part of the upper side of the fixing plate, limiting columns are distributed on opposite sides of the two vertical plates, an adjusting member is connected between the limiting column and the vertical plate, an end of the limiting column away from the vertical plate is slidably mounted with a clamping rod via a clamping spring, and an end of the limiting column away from the vertical plate is mounted with a locking assembly for locking the position of the clamping rod; The positioning unit includes positioning plates distributed on the upper ends of the two opposite sides of the vertical plates, the positioning plates are connected to the vertical plates through positioning members, and a transmission assembly is connected between the lower end of the positioning plates and the limiting column, and the transmission assembly is used to drive the positioning plates to move downward; An insertion distance positioning piece is installed at the front right side of the left vertical plate and at a position corresponding to the installation position of the positioning plate. The insertion distance positioning piece is used to position the insertion depth of the two pipes; The transmission assembly includes a transmission plate distributed in the middle above the limit column, the front and rear ends of the transmission plate are connected to the limit column by a U-shaped plate, and the vertical section of the U-shaped plate is set to an elastic telescopic structure. The upper end of the transmission plate is slidably mounted with an L-shaped transmission rod, and the horizontal section of the transmission rod is fixedly connected to the positioning plate; A square groove is provided at the lower end of the transmission plate, and matching grooves are provided inside the front and rear of the square groove. The end of the matching groove close to the middle of the hot melt welding machine is set to an inclined structure arranged downwardly, and the end of the matching groove away from the middle of the hot melt welding machine is set to a horizontal structure. A matching column block is slidably installed in the matching groove, and a square rod is fixedly installed on the two matching column blocks. The lower end of the square rod slides left and right to pass through the limit column and is fixedly connected to the end of the tightening rod away from the middle of the hot melt welding machine.

2. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 1, characterized in that: The locking assembly includes a plurality of circumferentially evenly arranged elastic locking rods radially slidably mounted on opposite sides of two limit columns, and the elastic locking rods are connected to the limit columns through connecting springs. The back sides of the plurality of elastic locking rods and the side close to the middle of the hot melt welding machine are all set as inclined surfaces.

3. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 2, characterized in that: The locking assembly also includes a linkage matching sleeve that is slidably installed on the opposite sides of the two limit columns. A plurality of circumferentially evenly arranged return springs are connected between the linkage matching sleeve and the limit columns, and the back sides of the two linkage matching sleeves are in contact with the corresponding plurality of elastic locking rod inclined surfaces.

4. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 2, characterized in that: The outer side of the clamping rod is provided with a plurality of locking holes evenly arranged circumferentially at one end close to the middle of the hot melt welding machine. The locking holes are used to cooperate with the elastic locking rod to lock the clamping rod. The end of the clamping rod close to the middle of the hot melt welding machine is set to a high friction material.

5. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 4, characterized in that: The giving way component includes a giving way plate that is installed on the upper side of the vertical plate for sliding left and right. The end of the giving way plate away from the middle of the hot melt welding machine slides left and right to pass through the vertical plate and is fixed with two fixed blocks that are symmetrically arranged up and down, and a buffer spring is connected between the fixed block and the vertical plate. The positioning plate slides up and down and is installed on the end of the giving way plate close to the middle of the hot melt welding machine. The lower end of the positioning plate slides up and down to pass through the giving way plate and is fixedly connected to its corresponding transmission rod.

6. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 1, characterized in that: The insertion distance positioning member includes a square plate fixedly mounted on the right end of the vertical plate located on the left, and a positioning matching plate is mounted on the front end of the square plate so as to slide left and right via a plurality of guide springs.

7. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 6, characterized in that: An L-shaped plate is installed at the position of the positioning plate corresponding to the left rear end of the left side of the vertical plate on the left, a scale groove is opened on the front side of the square plate, and the left end of the L-shaped plate and the right end of the positioning matching plate correspond to the corresponding positioning plate positions.

8. The hot-melt equipment for chlorinated polyvinyl chloride composite pipes according to claim 1, characterized in that: L-shaped connecting rods are installed on opposite sides of the upper ends of the two fixed plates for sliding left and right movement via extension springs, and matching sleeves are fixedly installed on the ends of the horizontal sections of the connecting rods away from the fixed plates.

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