Novel expansion tank and preparation method thereof

Abstract

The invention discloses a novel expansion tank and a preparation method thereof, the novel expansion tank comprises an expansion tank main body, the expansion tank main body comprises a middle cylinder, an upper cover and a lower cover, and the middle cylinder, the upper cover and the lower cover are made of plastic materials; the rubber liner is mounted in the inner cavity of the expansion tank main body, and the rubber liner comprises a rubber liner main body; and the elastic sleeve is fixedly arranged at the top of the rubber liner in a sleeving manner. The technical problems that in the using process of an existing expansion tank, a tank body of the expansion tank is inconvenient to assemble, the installation time and labor cost of the tank body are increased, the production cost of the expansion tank is improved, and the buffering performance on liquid is poor are solved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid circulation, in particular to a novel expansion tank and a preparation method thereof. Background Art

[0002] The expansion tank is a type of fluid circulation device and an important component in a refrigeration system or heating system. It is used to deal with the volume expansion or contraction of the liquid in the system due to temperature changes. It acts as a buffer in the system to prevent excessive pressure on pipes, pumps and other components due to the thermal expansion and contraction of the liquid, thereby protecting the integrity and safety of the system. It is used in central air conditioners, boilers, water heaters, constant pressure water supply and liquid cooling temperature control units to stabilize the water pressure in the water system. In systems that use water or other non-volatile fluids as cooling media, expansion tanks are used to deal with the thermal expansion of the fluid. In heating systems such as hot water heating systems or solar water heaters. As the water is heated, its volume increases, and the expansion tank provides space for the additional volume. There is generally an air chamber separated by rubber inside the expansion tank. When the water expands due to heat, it compresses this air chamber. When the water cools down, the air chamber can help maintain the pressure in the system stable.

[0003] The expansion tank assembly and unit with Chinese patent application number 202410948135.4, the expansion tank assembly includes: an expansion tank, including a tank body and an interface part connected to the tank body; and a valve assembly, including a main body and a baffle, the main body having a first port, a second port and a third port, a first flow channel and a second flow channel connected to the first flow channel are formed inside the main body, the first port and the second port are located at both ends of the first flow channel, the third port is located at one end of the second flow channel, and the third port is connected to the interface part so that the first flow channel is connected to the interior of the tank body; the baffle is arranged to pass through the second flow channel to separate the second flow channel into two sub-flow channels, one end of the baffle extends into the first flow channel, and the other end extends into the tank body.

[0004] During the use of the existing expansion tank, it is not convenient to assemble the tank body of the expansion tank, which increases the installation time and labor cost of the tank body, increases the production cost of the expansion tank, and has poor buffering performance for liquids. Summary of the invention

[0005] The technical problem to be solved by the present invention is that it is inconvenient to assemble the tank body of the existing expansion tank during use, which increases the installation time and labor cost of the tank body, increases the production cost of the expansion tank, and has poor buffering performance for liquids.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a new expansion tank, comprising:

[0007] The expansion tank body comprises a middle cylinder, an upper cover and a lower cover, and the middle cylinder, the upper cover and the lower cover are made of plastic;

[0008] A rubber bladder, the rubber bladder is installed in the inner cavity of the expansion tank body, and the rubber bladder includes a rubber bladder body;

[0009] An elastic sleeve, wherein the elastic sleeve is fixedly mounted on the top of the rubber bladder;

[0010] A pulling member is installed on the top of the elastic sleeve, and the top of the pulling member is installed on the top of the inner cavity of the expansion tank body.

[0011] Preferably, an air nozzle is fixedly installed on the top of the upper cover, the air outlet end of the air nozzle passes through the inner cavity of the upper cover, a protective cover is threadedly sleeved on the top of the upper cover, a sealing plug is installed on the top of the inner cavity of the protective cover, and the sealing plug seals the air inlet of the air nozzle.

[0012] Preferably, a first flange is fixedly connected to the bottom of the lower cover, a second flange is provided at the bottom of the first flange, and a connecting pipe is fixedly connected to the bottom of the second flange.

[0013] Preferably, the top and bottom of the middle cylinder are fixedly connected with a first connecting ring, the bottom of the upper cover and the top of the lower cover are fixedly connected with a second connecting ring, sealant is provided on the opposite sides of the first connecting ring and the second connecting ring, and the surfaces of the first connecting ring and the second connecting ring are sleeved with sealing rings and fixing rings, and the inner wall of the fixing ring is movably connected with the surfaces of the sealing ring, the first connecting ring, the second connecting ring, the middle cylinder, the upper cover and the lower cover.

[0014] Preferably, a semicircular head is provided on the top of the rubber bladder body, and a mounting tube is connected to the bottom of the rubber bladder body, and a third flange is fixedly connected to the bottom of the mounting tube, and the third flange is located on the side opposite to the first flange and the second flange, and the mounting tube is located at the bottom of the inner cavity of the lower cover and is connected to the connecting tube, and a plurality of first pull straps are fixedly connected to the surface of the rubber bladder body, and one end of the first pull straps away from the rubber bladder body is connected to the inner wall of the lower cover, and a fixing ball is provided at the middle end of the inner cavity of the rubber bladder body, and a plurality of second pull straps are fixedly connected to the top of the fixing ball, and the top of the second pull straps is fixedly connected to the inner wall of the semicircular head.

[0015] Preferably, the bottom of the fixing ball is fixedly connected to a rod body, the bottom of the rod body is fixedly connected to a fixing piece, the fixing piece is fixedly installed on the inner wall of the mounting tube, the first drawstring is distributed around the surface of the rubber bladder body, and the top of the second drawstring is distributed around the top of the inner wall of the semicircular head.

[0016] Preferably, the second draw strap has the same structure as the first draw strap, the first draw strap comprises a plurality of elastic ropes wound around each other, the surface of the elastic rope is sleeved with an inner elastic tube, the surface of the inner elastic tube is wrapped with a spiral reinforcement rope, the surface of the inner elastic tube is provided with a spiral groove for use with the spiral reinforcement rope, the surfaces of the inner elastic tube and the spiral reinforcement rope are sleeved with an outer elastic tube.

[0017] Preferably, the elastic sleeve comprises a semicircular sleeve, the semicircular sleeve is fixedly sleeved on the surface of the semicircular head, a plurality of through holes are opened on the surface of the semicircular sleeve, a conical head is fixedly connected to the top of the semicircular sleeve, and a hanging ring is fixedly connected to the top of the conical head.

[0018] Preferably, the pulling member includes a pulling rope, a locking buckle is fixedly connected to the bottom of the pulling rope, the locking buckle is installed on a lifting ring, a threaded plug rod passing through the lifting ring is threadedly connected to the locking buckle, the top of the pulling rope is fixedly connected to a plate body, pulling rods are fixedly connected to the left and right sides of the top of the plate body, and the pulling rods are fixedly installed on the top of the inner wall of the upper cover.

[0019] A method for preparing a novel expansion tank comprises the following steps:

[0020] S1. Install the rubber bladder inside the expansion tank body to fix the rubber bladder. Install the rubber bladder inside the lower cover in advance, and then use bolts and nuts to fix the second flange, the third flange and the first flange. Fix the installation pipe at the bottom of the inner cavity of the lower cover so that the connecting pipe and the installation pipe are connected, and the liquid can smoothly enter the rubber bladder body. Install the end of the first drawstring away from the rubber bladder body on the inner wall of the lower cover;

[0021] S2, assemble the middle tube, the upper cover and the lower cover, cover the middle tube on the top of the lower cover, fix the pulling rod on the top of the inner wall of the upper cover, fix the pulling rope, fix the lock buckle and the threaded plug rod on the lifting ring, connect the pulling rope, the semicircular sleeve, the semicircular head and the rubber bladder body, and finally cover the upper cover on the top of the middle tube to achieve the pre-installation of the middle tube, the upper cover and the lower cover;

[0022] S3. Fix and seal the middle cylinder, upper cover and lower cover so that the middle cylinder, upper cover and lower cover form a complete tank body. Apply sealant on the side opposite to the first connecting ring and the second connecting ring to prevent leakage at the connection between the middle cylinder, upper cover and lower cover. Then, sleeve the sealing ring on the surface of the first connecting ring and the second connecting ring to perform secondary sealing. The surfaces of the first connecting ring and the second connecting ring are pre-opened with grooves for use with the sealing rings. After sealing, sleeve the fixing ring on the surface of the first connecting ring and the second connecting ring. The fixing ring is cylindrical before installation. After sleeve installation, the upper and lower sides of the fixing ring are squeezed to form an inwardly curved covering ring on its upper and lower sides. The covering ring is fixed on the surfaces of the first connecting ring and the second connecting ring. The first connecting ring and the second connecting ring are fixed and sealed so that the middle cylinder, upper cover and lower cover form a complete tank body.

[0023] Beneficial effects of the present invention:

[0024] 1. The present invention can fill nitrogen into the interior of the middle tube, the upper cover and the lower cover through the air nozzle. When the liquid in the system expands due to temperature increase, the nitrogen can be compressed to accommodate the excess liquid volume. On the contrary, when the liquid cools and shrinks, the nitrogen will expand to fill the gap and maintain the pressure of the system stable. After the filling is completed, the protective cover is screwed on the top of the upper cover, and the sealing plug is inserted into the air inlet of the air nozzle to seal it.

[0025] 2. The present invention prevents leakage at the connection between the middle tube, the upper cover and the lower cover by applying sealant to the opposite side of the first connecting ring and the second connecting ring, and then sleeves the sealing ring on the surface of the first connecting ring and the second connecting ring to perform secondary sealing. The surfaces of the first connecting ring and the second connecting ring are pre-opened with grooves for use with the sealing rings. After sealing is completed, a fixing ring is sleeved on the surfaces of the first connecting ring and the second connecting ring. The fixing ring is cylindrical before installation. After sleeved, the upper and lower sides of the fixing ring are squeezed to form an inwardly curved covering ring on its upper and lower sides. The covering ring is fixed on the surfaces of the first connecting ring and the second connecting ring, and the first connecting ring and the second connecting ring are fixed and sealed, so that the middle tube, the upper cover and the lower cover form a complete tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the main structure of the expansion tank of the present invention;

[0027] Figure 2 It is a cross-sectional view of the expansion tank body of the present invention;

[0028] Figure 3 For the present invention Figure 2 A magnified view of middle;

[0029] Figure 4It is a schematic diagram of the structure of the expansion tank body, the rubber bladder, the elastic sleeve and the pulling member of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the rubber bladder of the present invention;

[0031] Figure 6 is a cross-sectional view of the rubber bladder of the present invention;

[0032] Figure 7 It is a schematic diagram of the elastic sleeve structure of the present invention;

[0033] Figure 8 It is a schematic diagram of the pulling member structure of the present invention;

[0034] Fig. 9 is a cross-sectional view of a first drawstring of the present invention;

[0035] Fig.10 It is a schematic diagram of the structure of the inner elastic sleeve of the present invention;

[0036] Fig.11 It is a schematic diagram of the spiral reinforcement rope structure of the present invention.

[0037] In the figure: 100, expansion tank body; 101, middle cylinder; 102, upper cover; 103, lower cover; 104, fixing ring; 105, protective cover; 106, connecting pipe; 107, sealing plug; 108, air nozzle; 109, first flange; 110, second flange; 111, first connecting ring; 112, second connecting ring; 113, sealant; 114, sealing ring; 200, rubber bladder; 201, rubber bladder body; 202, semicircular head; 203, first drawstring; 204, installation pipe; 205 , the third flange; 206, the fixing ball; 207, the second pull belt; 208, the rod body; 209, the fixing piece; 300, the elastic sleeve; 301, the semicircular sleeve; 302, the lifting ring; 303, the conical head; 304, the through hole; 400, the pulling piece; 401, the pulling rope; 402, the pulling rod; 403, the plate body; 404, the locking buckle; 405, the threaded plug rod; 2031, the elastic rope; 2032, the inner elastic tube; 2033, the spiral reinforcement rope; 2034, the outer elastic tube; 2035, the spiral groove. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0039] Embodiment 1, as Figure 1-Figure 11 As shown, this embodiment provides a new expansion tank, including an expansion tank body 100, the expansion tank body 100 includes a middle cylinder 101, an upper cover 102 and a lower cover 103, and the middle cylinder 101, the upper cover 102 and the lower cover 103 are made of plastic.

[0040] By replacing metal materials with plastic materials, welding processing is not required, which reduces production costs, and anti-rust treatment is not required, thus avoiding the occurrence of rust.

[0041] An air nozzle 108 is fixedly installed on the top of the upper cover 102, and the air outlet end of the air nozzle 108 passes through the inner cavity of the upper cover 102. A protective cover 105 is threadedly sleeved on the top of the upper cover 102, and a sealing plug 107 is installed on the top of the inner cavity of the protective cover 105. The sealing plug 107 seals the air inlet of the air nozzle 108.

[0042] Nitrogen can be filled into the interior of the middle tube 101, the upper cover 102 and the lower cover 103 through the air nozzle 108. When the liquid in the system expands due to the increase in temperature, the nitrogen can be compressed to accommodate the excess liquid volume. On the contrary, when the liquid cools and shrinks, the nitrogen will expand to fill the gap and maintain the pressure of the system stable. After the filling is completed, the protective cover 105 is screwed on the top of the upper cover 102, and the sealing plug 107 is inserted into the air inlet of the air nozzle 108 to seal it.

[0043] A first flange 109 is fixedly connected to the bottom of the lower cover 103 , a second flange 110 is provided at the bottom of the first flange 109 , and a connecting pipe 106 is fixedly connected to the bottom of the second flange 110 .

[0044] The top and bottom of the middle tube 101 are fixedly connected with a first connecting ring 111, the bottom of the upper cover 102 and the top of the lower cover 103 are fixedly connected with a second connecting ring 112, and sealant 113 is provided on the opposite sides of the first connecting ring 111 and the second connecting ring 112. The surfaces of the first connecting ring 111 and the second connecting ring 112 are sleeved with a sealing ring 114 and a fixing ring 104, and the inner wall of the fixing ring 104 is movably connected to the surfaces of the sealing ring 114, the first connecting ring 111, the second connecting ring 112, the middle tube 101, the upper cover 102 and the lower cover 103.

[0045] By applying sealant 113 on the opposite side of the first connecting ring 111 and the second connecting ring 112, leakage is prevented at the connection between the middle tube 101, the upper cover 102 and the lower cover 103, and then the sealing ring 114 is sleeved on the surface of the first connecting ring 111 and the second connecting ring 112 to perform secondary sealing. The surfaces of the first connecting ring 111 and the second connecting ring 112 are pre-opened with grooves for use with the sealing ring 114. After the sealing is completed, the fixing ring 104 is sleeved on the surfaces of the first connecting ring 111 and the second connecting ring 112. The fixing ring 104 is cylindrical before installation. After the sleeve is completed, the upper and lower sides of the fixing ring 104 are squeezed to form an inwardly curved covering ring on its upper and lower sides. The covering ring is fixed on the surfaces of the first connecting ring 111 and the second connecting ring 112, and the first connecting ring 111 and the second connecting ring 112 are fixed and sealed, so that the middle tube 101, the upper cover 102 and the lower cover 103 form a complete tank body.

[0046] The expansion tank body 100 further includes a bladder 200 . The bladder 200 is installed in the inner cavity of the expansion tank body 100 . The bladder 200 includes a bladder body 201 .

[0047] A semicircular head 202 is provided on the top of the rubber bladder body 201, and a mounting tube 204 is connected to the bottom of the rubber bladder body 201. A third flange 205 is fixedly connected to the bottom of the mounting tube 204, and the third flange 205 is located on the side opposite to the first flange 109 and the second flange 110. The mounting tube 204 is located at the bottom of the inner cavity of the lower cover 103 and is connected to the connecting tube 106. A plurality of first drawstrings 203 are fixedly connected to the surface of the rubber bladder body 201, and one end of the first drawstrings 203 away from the rubber bladder body 201 is connected to the inner wall of the lower cover 103. A fixing ball 206 is provided at the middle end of the inner cavity of the rubber bladder body 201, and a plurality of second drawstrings 207 are fixedly connected to the top of the fixing ball 206, and the top of the second drawstrings 207 is fixedly connected to the inner wall of the semicircular head 202.

[0048] The bottom of the fixed ball 206 is fixedly connected to a rod body 208, and the bottom of the rod body 208 is fixedly connected to a fixing piece 209, which is fixedly installed on the inner wall of the mounting tube 204. The first drawstring 203 is distributed around the surface of the rubber bladder body 201, and the top of the second drawstring 207 is distributed around the top of the inner wall of the semicircular head 202.

[0049] The second draw strap 207 has the same structure as the first draw strap 203. The first draw strap 203 includes a plurality of elastic ropes 2031 wound around each other. The surface of the elastic rope 2031 is sleeved with an inner elastic tube 2032. The surface of the inner elastic tube 2032 is wrapped with a spiral reinforcement rope 2033. The surface of the inner elastic tube 2032 is provided with a spiral groove 2035 for use with the spiral reinforcement rope 2033. The surfaces of the inner elastic tube 2032 and the spiral reinforcement rope 2033 are sleeved with an outer elastic tube 2034.

[0050] The bladder body 201 is made of EPDM rubber.

[0051] The elastic rope 2031, the inner elastic tube 2032 and the outer elastic tube 2034 are all made of rubber materials, and the inner elastic tube 2032 is made of steel wire rope material.

[0052] During the operation of the rubber bladder 200, the expanded liquid in the pipeline system passes through the connecting pipe 106, the second flange 110, the third flange 205 and the first flange 109 into the mounting tube 204, and the liquid enters the rubber bladder body 201 through the mounting tube 204, driving the semicircular head 202 and the rubber bladder body 201 to expand, and the rubber bladder body 201 and the semicircular head 202 squeeze the nitrogen filled in the inner cavity of the expansion tank body 100, and the rubber bladder body 201 drives the first drawstring 203 to stretch upward, and the semicircular head 202 drives the second drawstring 207 to stretch upward to buffer the pressure driven by the liquid. When the liquid does not expand, the first drawstring 203 and the second drawstring 207 drive the rubber bladder body 201 and the semicircular head 202 to reset, so that the liquid flows back into the pipeline system.

[0053] The second drawstrings 207 tilted upward can provide additional physical support for the bladder body 201, especially preventing it from over-stretching when the bladder body 201 expands. Such support helps to maintain the shape and integrity of the bladder body 201, reduce local stress concentration, and thus reduce the risk of material fatigue and breakage. The fixing ball 206 fixes the bottom of several second drawstrings 207, the rod 208 and the fixing member 209 fix the bottom of the fixing ball 206, and the fixing member 209 is fixed in the mounting tube 204, so that the liquid can pass through the fixing member 209 and enter the inner cavity of the bladder body 201.

[0054] During the system cooling or decompression process, the bladder body 201 needs to retract quickly and completely to its original state. The surrounding second drawstring 207 and the first drawstring 203 can help the bladder body 201 and the semicircular head 202 to return to their original state faster because it provides appropriate resistance to counteract the expansion tendency of the bladder body 201 and the semicircular head 202 without hindering their normal contraction action.

[0055] The second drawstring 207 has the same structure as the first drawstring 203. During the operation of the first drawstring 203, the elastic rope 2031, the inner elastic tube 2032, the spiral reinforcement rope 2033 and the outer elastic tube 2034 are deformed at the same time. The elastic ropes 2031 intertwined with each other provide tension and resilience. The inner elastic tube 2032 is wrapped around the surface of the elastic rope 2031 to prevent the elastic rope 2031 from being damaged by external factors. The spiral reinforcement rope 2033 is wrapped around the surface of the inner elastic tube 2032 to reinforce the first drawstring 203 as a whole. , to avoid excessive stretching and breakage, and to increase its service life, the surface of the spiral reinforcement rope 2033 is coated with lubricating oil to prevent the spiral groove 2035 on the surface of the inner elastic tube 2032 from being worn, and the spiral groove 2035 accommodates the spiral reinforcement rope 2033, and the outer elastic tube 2034 protects the spiral reinforcement rope 2033 and the inner elastic tube 2032 to avoid damage to the outer elastic tube 2034 and the spiral reinforcement rope 2033, and the outer elastic tube 2034 and the inner elastic tube 2032 can assist the elastic rope 2031 in working, thereby improving the overall performance of the first pull belt 203.

[0056] The elastic sleeve 300 is also included. The elastic sleeve 300 is fixedly mounted on the top of the rubber bladder 200 .

[0057] The elastic sleeve 300 includes a semicircular sleeve 301, which is fixedly sleeved on the surface of the semicircular head 202. The surface of the semicircular sleeve 301 is provided with a plurality of through holes 304. The top of the semicircular sleeve 301 is fixedly connected to a conical head 303, and the top of the conical head 303 is fixedly connected to a hanging ring 302.

[0058] The pull member 400 is also included. The pull member 400 is installed on the top of the elastic sleeve 300 , and the top of the pull member 400 is installed on the top of the inner cavity of the expansion tank body 100 .

[0059] The pulling member 400 includes a pulling rope 401, a locking buckle 404 is fixedly connected to the bottom of the pulling rope 401, the locking buckle 404 is installed on the hanging ring 302, a threaded plug rod 405 that passes through the hanging ring 302 is threadedly connected to the locking buckle 404, the top of the pulling rope 401 is fixedly connected to a plate body 403, and pulling rods 402 are fixedly connected to the left and right sides of the top of the plate body 403, and the pulling rods 402 are fixedly installed on the top of the inner wall of the upper cover 102.

[0060] The pulling rod 402 and the plate body 403 are fixed in advance on the top of the inner wall of the upper cover 102 to fix the pulling rope 401. The pulling rope 401 is installed on the lifting ring 302 through the lock buckle 404 and the threaded rod 405. When installing the lock buckle 404 and the threaded rod 405, first put the lock buckle 404 on the surface of the lifting ring 302, and then pass the threaded rod 405 through the lifting ring 302 and screw it on the lock buckle 404. The lifting ring 302 is fixed on the semicircular head 202 through the conical head 303 and the semicircular sleeve 301. The shape of the interior of the semicircular sleeve 301 is adapted to the shape of the semicircular head 202 to facilitate the pulling rope 401 to pull the semicircular head 202 as a whole. A through hole 304 is provided on the semicircular sleeve 301 to facilitate the deformation of the semicircular sleeve 301 and the semicircular head 202 to buffer the liquid.

[0061] The length of the pulling rope 401 is 0.1-10 cm. The pulling rope 401 pulled upward can maintain the shape of the rubber bladder body 201 to prevent it from being deformed by the downward pulling force of the first drawstring 203 and the second drawstring 207, so that there is enough space inside to accommodate liquid. In addition, the pulling rope 401 has a variety of different lengths and specifications to prevent the rubber bladder body 201 from being too tight or too loose. A longer pulling rope 401 can reduce the tightness of the rubber bladder body 201, and a shorter pulling rope 401 can increase the tightness of the rubber bladder body 201.

[0062] When the bladder body 201 is over-tightened, the space left for the liquid to expand is reduced, which means that when the liquid in the system expands due to heat, there is not enough extra space to accommodate the increased volume, which directly leads to an increase in the pressure in the system. If the bladder body 201 is too loose, the pressure fluctuations in the system may increase, which is a challenge for pumps and other circulation equipment that rely on stable pressure to work. Unstable fluid flow may cause the efficiency of the pump to decrease, and even cause problems such as cavitation, further affecting the performance of the entire system. Correctly adjusting the tightness of the bladder body 201 can ensure that the pressure in the system is maintained at an optimal level and maintain stable operation of the system.

[0063] Embodiment 2, as Figure 1-Figure 11 As shown, this embodiment provides a method for preparing a novel expansion tank, comprising the following steps:

[0064] S1. Install the rubber bladder (200) inside the expansion tank body (100) to fix the rubber bladder (200). The specific operation is as follows:

[0065] The rubber bladder 200 is installed inside the expansion tank body 100 to fix the rubber bladder 200. The rubber bladder 200 is installed inside the lower cover 103 in advance, and then the second flange 110, the third flange 205 and the first flange 109 are fixed with bolts and nuts. The mounting pipe 204 is fixed to the bottom of the inner cavity of the lower cover 103, so that the connecting pipe 106 and the mounting pipe 204 are connected, and the liquid can smoothly enter the rubber bladder body 201.

[0066] S2, assemble the centering tube (101), the upper cover (102) and the lower cover (103). The specific operation is as follows:

[0067] Assemble the middle cylinder 101, the upper cover 102 and the lower cover 103, cover the middle cylinder 101 on the top of the lower cover 103, fix the pulling rod 402 on the top of the inner wall of the upper cover 102, fix the pulling rope 401, fix the locking buckle 404 and the threaded plug 405 on the lifting ring 302, connect the pulling rope 401, the semicircular sleeve 301, the semicircular head 202 and the rubber bladder body 201, and preferably cover the upper cover 102 on the top of the middle cylinder 101 to realize the pre-installation of the middle cylinder 101, the upper cover 102 and the lower cover 103.

[0068] S3, fix and seal the middle cylinder (101), the upper cover (102) and the lower cover (103), so that the middle cylinder (101), the upper cover (102) and the lower cover (103) form a complete tank body. The specific operation is as follows:

[0069] The middle cylinder 101, the upper cover 102 and the lower cover 103 are fixed and sealed so that the middle cylinder 101, the upper cover 102 and the lower cover 103 form a complete tank body, and the sealant 113 is applied to the side opposite to the first connecting ring 111 and the second connecting ring 112 to prevent leakage at the connection between the middle cylinder 101, the upper cover 102 and the lower cover 103, and then the sealing ring 114 is sleeved on the surface of the first connecting ring 111 and the second connecting ring 112 to perform secondary sealing. The surfaces of the first connecting ring 111 and the second connecting ring 112 are pre-opened with the sealing ring 114. 14 is used in conjunction with the groove. After the sealing is completed, the fixing ring 104 is sleeved on the surface of the first connecting ring 111 and the second connecting ring 112. The fixing ring 104 is cylindrical before installation. After the sleeve is completed, the upper and lower sides of the fixing ring 104 are squeezed to form an inwardly curved covering ring on the upper and lower sides. The covering ring is fixed on the surface of the first connecting ring 111 and the second connecting ring 112, and the first connecting ring 111 and the second connecting ring 112 are fixed and sealed, so that the middle cylinder 101, the upper cover 102 and the lower cover 103 form a complete tank body.

Claims

1. A new expansion tank, characterized in that: include, An expansion tank body (100), wherein the expansion tank body (100) comprises a middle cylinder (101), an upper cover (102) and a lower cover (103), wherein the middle cylinder (101), the upper cover (102) and the lower cover (103) are made of plastic; A rubber bladder (200), the rubber bladder (200) being installed in the inner cavity of the expansion tank body (100), the rubber bladder (200) comprising a rubber bladder body (201); An elastic sleeve (300), the elastic sleeve (300) being fixedly sleeved on the top of the rubber bladder (200); A pulling member (400) is installed on the top of the elastic sleeve (300), and the top of the pulling member (400) is installed on the top of the inner cavity of the expansion tank body (100).

2. The novel expansion tank according to claim 1, characterized in that: An air nozzle (108) is fixedly mounted on the top of the upper cover (102), and the air outlet end of the air nozzle (108) penetrates into the inner cavity of the upper cover (102). A protective cover (105) is threadedly sleeved on the top of the upper cover (102), and a sealing plug (107) is mounted on the top of the inner cavity of the protective cover (105), and the sealing plug (107) seals the air inlet of the air nozzle (108).

3. The novel expansion tank as claimed in claim 2, characterized in that: The bottom of the lower cover (103) is fixedly connected with a first flange (109).

4. The novel expansion tank as claimed in claim 3, characterized in that: The top and bottom of the middle cylinder (101) are both fixedly connected with a first connecting ring (111).

5. The novel expansion tank as claimed in claim 4, characterized in that: A plurality of first drawstrings (203) are fixedly connected to the surface of the rubber bladder body (201).

6. The novel expansion tank as claimed in claim 5, characterized in that: The first drawstring (203) is distributed around the surface of the rubber bladder body (201).

7. The novel expansion tank as claimed in claim 1, characterized in that: The pulling member (400) includes a pulling rope (401), the bottom of which is fixedly connected to a lock buckle (404), which is installed on a hanging ring (302), and a threaded plug rod (405) that passes through the hanging ring (302) is threadedly connected to the lock buckle (404), the top of the pulling rope (401) is fixedly connected to a plate body (403), and the left and right sides of the top of the plate body (403) are fixedly connected to pulling rods (402), and the pulling rods (402) are fixedly installed on the top of the inner wall of the upper cover (102).

8. A method for preparing a novel expansion tank, applicable to the novel expansion tank according to any one of claims 1 to 7, characterized in that: The following steps are included: S1, installing the rubber bladder (200) inside the expansion tank body (100) to fix the rubber bladder (200); S2, assembling the centering tube (101), the upper cover (102) and the lower cover (103); S3, fixing and sealing the middle cylinder (101), the upper cover (102) and the lower cover (103), so that the middle cylinder (101), the upper cover (102) and the lower cover (103) form a complete tank body.

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