CN108915033B

CN108915033B - Fire hydrant well

Info

Publication number: CN108915033B
Application number: CN201810951018.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Kunming Kaisida Pump Valve Materials Co Ltd
Current assignee: Kestar Technology Co ltd
Priority date: 2017-02-23
Filing date: 2017-02-23
Publication date: 2020-07-07
Anticipated expiration: 2037-02-23
Also published as: CN106801452B; CN106801452A; CN108915033A

Abstract

The invention relates to the technical field of fire fighting equipment. Aim at provides long service life and convenient to use's fire hydrant well. The adopted technical scheme is as follows: the fire hydrant well comprises a well body and a fire hydrant positioned at the top of the well body, wherein an outer sleeve is arranged on the inner wall of the bottom surface of the well body, and a hydrant head accommodating cavity is arranged in the top surface of the well body; the outer sleeve and the bolt head accommodating cavity are opposite to the vertical pipe, and the vertical pipe penetrates through the outer sleeve and then penetrates out of the bottom of the bolt head accommodating cavity; the middle section of the vertical pipe is a corrugated hose and the whole middle section is positioned in the outer sleeve; the top of the bolt head accommodating cavity is provided with a sealing cover, one edge of the sealing cover is hinged with the upper edge of one side of the bolt head accommodating cavity, and the other edge of the sealing cover is pressed against the edge of the other side of the bolt head accommodating cavity; the middle part of the sealing cover is provided with an opening matched with the upper section of the stand pipe, and the opening extends from the position, close to the hinge joint, of the sealing cover to the edge, far away from the hinge joint, of the sealing cover. The invention greatly improves the structural strength of the fire hydrant well.

Description

Fire hydrant well

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a fire hydrant well.

Background

The fire hydrant is a very important fire-fighting device arranged on a fire-fighting water pipe network, and once a fire disaster occurs, the fire hydrant needs to be provided with a water source, so that the fire hydrant is very important to be protected. The existing hydrant well can be classified into three types according to material, namely a concrete brick-built type hydrant well, a steel hydrant well and a plastic hydrant well. The concrete brick built type fire hydrant well is formed by building bricks or pouring reinforced concrete, the well has long construction period, and a plurality of matched devices are needed in the construction stage, so that the normal use of various facilities such as roads around the fire hydrant well is seriously influenced. The steel fire hydrant well is made of steel materials, and has the defects of difficult transportation and labor-consuming installation after being processed into a finished product. The plastic fire hydrant well has short construction period and convenient transportation.

However, compared with concrete brick-built fire hydrant wells and steel fire hydrant wells, the plastic fire hydrant wells have relatively low structural strength, and in order to improve the structural strength in the prior art, a steel ring is usually erected in the well, the steel ring is directly and fixedly connected with the well wall through bolts or other connecting pieces, and the well wall is supported through the steel ring, so that the structural strength is improved. However, in the prior art, the steel ring is directly fixed on the well wall, so that only the stress transmission between the steel ring and the fire hydrant well can be realized, the stress cannot be effectively transmitted to the soil outside the well, and after long-term use, the connecting node is easy to deform, thereby greatly influencing the service life of the plastic fire hydrant well. Therefore, how to improve the structural strength of the plastic fire hydrant well is a great technical problem in the field. In addition, all the conventional fire hydrants are fixedly arranged at the top of the fire hydrant well, and the fire hydrants sometimes obstruct the passing of people, vehicles and the like. This greatly reduces the flexibility of the fire hydrant and the overall installation location of the fire hydrant well. Therefore, how to provide a fire hydrant which can be installed at a reasonable position to effectively ensure the coverage area and does not influence the passing of people and vehicles is a big problem in the industry.

Disclosure of Invention

The invention aims to provide a fire hydrant well which is long in service life and convenient to use.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: the fire hydrant well comprises a well body and a fire hydrant positioned at the top of the well body, wherein a main water inlet pipe is arranged below the well body, the main water inlet pipe is connected with the fire hydrant through a vertical pipe penetrating through the well body, an access hole is further formed in the top of the well body, and a well cover is arranged at the access hole.

The outer side walls of the upper portion and the lower portion of the well body are respectively provided with a plurality of connecting pipes communicated with the interior of the well body, the connecting pipes incline downwards, the well body is used as the center and is uniformly distributed in an annular mode, and inner threads are arranged on the inner walls of the connecting pipes. Every connecting pipe department corresponds and sets up one and grabs the ground pole, grab the surface of ground pole and set up the external screw thread with internal thread matched with. One end of the ground grabbing rod is positioned in the well body, the end part of the ground grabbing rod is provided with a connecting ring, and the other end of the ground grabbing rod penetrates out of the well body along the connecting pipe. Still including being located the internal portion of well and size and well internal diameter matched with go up supporting ring and under bracing ring, go up supporting ring and under bracing ring and buckle by the reinforcing bar and constitute and the size of reinforcing bar and the internal diameter of go-between cooperate, the go-between cover that is located the ground pole of grabbing on well body upper portion is established on last supporting ring, and the go-between cover that is located the ground pole of grabbing of well body lower part is established on under supporting ring.

Preferably, the inner wall of the bottom surface of the well body is provided with a vertical outer sleeve, and the top surface of the well body is concave downwards to form a bolt head accommodating cavity. The outer sleeve and the bolt head accommodating cavity are opposite to the vertical pipe, and the vertical pipe penetrates through the outer sleeve and then penetrates out of the bottom of the bolt head accommodating cavity. The riser comprises an upper section, a middle section and a lower section, wherein the middle section is a corrugated hose and is integrally positioned in the outer sleeve. The top in chamber is accomodate to the bolt head sets up the closing cap, one side of closing cap and the upper limb of taking in chamber one side of bolt head are articulated, and the another side of closing cap presses on the border of taking in chamber opposite side of bolt head. The middle part of the sealing cover is provided with an opening matched with the upper section of the stand pipe, and the opening extends from the position, close to the hinge joint, of the sealing cover to the edge, far away from the hinge joint, of the sealing cover.

Preferably, the sealing covers on the two sides of the opening are provided with clamping grooves, and the upper section of the vertical pipe is provided with clamping blocks matched with the clamping grooves.

Preferably, the length of the ground grabbing rod is 60-120 cm.

Preferably, the inclination angle of the connecting pipe is 35-60 °.

Preferably, still include fire hydrant locating component, fire hydrant locating component is including setting up the threaded sleeve pipe on the well body wall of a well of bolt head storage chamber bottom, the threaded sleeve pipe is along vertical inside and bolt head storage chamber of running through the well body. The threaded sleeve is internally provided with a screw rod in a penetrating mode, the lower end of the screw rod is connected with a hand-operated handle, and the upper end of the screw rod is connected with a connecting piece through a rotary joint. The connecting piece is fixedly connected with the bolt head of the fire hydrant.

Preferably, set up the cat ladder between last supporting ring and the lower support ring, the both ends of cat ladder respectively with last supporting ring and lower support ring welding. The position of cat ladder is relative with the well lid.

Preferably, set up the bracing piece between last supporting ring and the lower support ring, the both ends of bracing piece weld with last supporting ring and lower support ring respectively.

Preferably, the bottom of the well body is also provided with a water collecting tank, and the inner bottom surface of the well body is a slope surface inclined towards the water collecting tank.

Preferably, the well body is made of high-strength plastics, and the high-strength plastics are composed of the following raw materials in parts by weight: 28 parts of unsaturated polyester resin formed by condensation polymerization of isophthalic acid and propylene glycol, 25 parts of unsaturated polyester resin formed by condensation polymerization of terephthalic acid and propylene glycol, 0.2 part of cobalt naphthenate, 0.5 part of methyl ethyl ketone peroxide, 20 parts of calcium carbonate, 0.3 part of polyhydric alcohol, 8 parts of copper powder, 5 parts of silicon oxide powder and 20 parts of carbon fiber.

The invention has the beneficial effects that the stress can be effectively dispersed into the soil around the fire hydrant well through the special arrangement of the connecting pipe, the upper and lower support rings and the ground grabbing rod, and the structural strength of the fire hydrant well is greatly improved. And the installation is rapid and quick, and the use is very convenient. Specifically, when the device is used, a foundation pit is firstly excavated, then a well body and a fire hydrant are installed in place, then soil is covered and compacted, and then the ground grabbing rod is screwed out of the connecting pipe to be inserted into deep soil. Compared with the traditional fire hydrant well, the ground grabbing rod penetrates out of the interior of the fire hydrant well, so that excavation is not required to be enlarged when a foundation pit is excavated, the foundation pit only needs to be installed, and the trouble and labor are saved. After the ground grabbing rod is installed, the upper supporting ring and the lower supporting ring sequentially penetrate through the connecting rings at the end part of the ground grabbing rod, and the serial connection and the positioning of the connecting rings are realized. Traditional fire hydrant well can transmit stress to the steel ring when local stress is great, and the steel ring supports the well body on the one hand, and on the other hand transmits the stress dispersion to the well body, but the stress can only be transmitted through the well body self at last, and the connected node stress of the well body and steel ring still is comparatively concentrated moreover, and life is extremely limited. Compared with the traditional fire hydrant well, the stress is transmitted to the well body through the upper support ring, the lower support ring and the ground grabbing rod on one hand, and on the other hand, the stress can be transmitted to deep soil directly through the ground grabbing rod, so that more efficient stress dispersion is realized. The structural strength of the fire hydrant well is greatly improved, and the service life of the fire hydrant well is greatly prolonged. Meanwhile, each part can be independently installed, so that the difficulty of transportation and carrying is greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic structural view of an upper support ring;

FIG. 4 is a schematic view of the ground bar;

FIG. 5 is an enlarged view of portion A of FIG. 1;

FIG. 6 is a schematic view of the structure of FIG. 1 in a use state;

FIG. 7 is an enlarged view of portion B of FIG. 6;

FIG. 8 is a schematic view of the closure;

FIG. 9 is a schematic structural view of a fire hydrant positioning assembly.

Detailed Description

The fire hydrant well shown by combining the figures 1-8 comprises a well body 1 and a fire hydrant 2 located at the top of the well body 1, wherein a main water inlet pipe 3 is arranged below the well body 1, the main water inlet pipe 3 is connected with the fire hydrant 2 through a vertical pipe 4 penetrating through the well body 1, the top of the well body 1 is also provided with an access hole, and the access hole is provided with a well cover 5. The outer side walls of the upper portion and the lower portion of the well body 1 are respectively provided with a plurality of connecting pipes 6 communicated with the interior of the well body 1, the connecting pipes 6 are inclined downwards and are distributed uniformly in an annular shape by taking the well body 1 as a center, the connecting pipes 6 are shown in a combined

drawing

1 and 2, the number of the connecting pipes 6 is 4, the number of the connecting pipes can be 5, 6 and the like, and inner threads are arranged on the inner walls of the connecting pipes 6. Every 6 departments of connecting pipe correspond and set up one and grab ground pole 7, grab ground pole 7's surface setting and internal thread matched with external screw thread, grab

ground pole

7 and 6 screw-thread fit of connecting pipe. One end of the ground grabbing rod 7 is positioned inside the well body 1, the end part of the ground grabbing rod is provided with a connecting ring 8, and the other end of the ground grabbing rod penetrates out of the well body 1 along the connecting pipe 6. The length of the gripping rod 7 is chosen according to the length of the well body 1, typically between 60-120 cm. The inclination angle of the connecting pipe 6 is usually between 35-60 degrees, and the horizontal and vertical stress effects of the ground grabbing rod 7 are most balanced when the inclination angle is 45 degrees. The well body 1 is usually made of high-strength plastic, and the connecting pipe 6 is generally integrated with the well body 1 and is integrally formed in the processing stage of the well body 1. And the ground-grasping rod 7 is generally a rod body made of stainless steel material.

The invention also comprises an upper supporting ring 9 and a lower supporting ring 10 which are positioned in the well body 1 and have the size matched with the inner diameter of the well body 1, namely, the outer diameters of the upper supporting ring 9 and the lower supporting ring 10 are slightly smaller than the inner diameter of the well body 1, and after the installation is finished, the circumferential surface of the well body 1 can be supported. Generally, the upper support ring 9 and the lower support ring 10 are formed by bending steel bars, so that the field processing and installation are convenient, and of course, the upper support ring 9 and the lower support ring 10 can also be rings directly forged and formed by a die and are placed in the well body 1 before the well body 1 is not sealed. The size of the steel bars forming the upper support ring 9 and the lower support ring 10 is matched with the inner diameter of the connecting ring 8, namely the size of the ring body of the connecting ring 8 is equivalent to the size of the cross section of the steel bars, and the steel bars basically do not shake after passing through the connecting ring 8. The connecting ring 8 of the ground grabbing rod 7 positioned at the upper part of the well body 1 is sleeved on the upper supporting ring 9, and the connecting ring 8 of the ground grabbing rod 7 positioned at the lower part of the well body 1 is sleeved on the lower supporting ring 10. The ground engaging bars 7 are connected by an upper support ring 9 and a lower support ring 10.

When the underground soil-covering device is used, a foundation pit is firstly excavated, then the well body 1 and the fire hydrant 2 are installed in place, then soil is covered and compacted, and then the ground grabbing rod 7 is screwed out from the connecting pipe 6, so that the ground grabbing rod 7 is inserted into deep soil. Compared with the traditional fire hydrant well, the ground grabbing rod 7 penetrates out of the interior of the fire hydrant well, so that excavation is not required to be enlarged when a foundation pit is excavated, the foundation pit only needs to be installed with the well body 1, and the trouble and labor are saved. After the ground grabbing rod 7 is installed, the upper supporting ring 9 and the lower supporting ring 10 sequentially penetrate through the connecting rings 8 at the end parts of the ground grabbing rod 7, so that the connection and the positioning of the connecting rings 8 are realized, and the ground grabbing rod 7 is prevented from rotating. Traditional fire hydrant well can transmit stress to the steel ring when local stress is great, and the steel ring supports well body 1 on the one hand, and on the other hand transmits stress dispersion to well body 1, but stress can only transmit through well body 1 self at last, and the connected node stress of well body 1 and steel ring still is comparatively concentrated moreover, and life is extremely limited. Compared with the traditional fire hydrant well, the stress is transmitted to the well body 1 through the upper and lower support rings 9 and 10 and the ground grabbing rod 7 on one hand, and on the other hand, the stress can be transmitted to deep soil directly through the ground grabbing rod 7, so that more efficient stress dispersion is realized. The structural strength of the fire hydrant well is greatly improved, and the service life of the fire hydrant well is greatly prolonged. Meanwhile, each part can be independently installed, so that the difficulty of transportation and carrying is greatly reduced.

In addition, as shown in fig. 1, 6, 7 and 8, in order to make the installation position of the present invention more flexible, it is better to arrange a vertical outer sleeve 11 on the inner wall of the bottom surface of the well body 1, the outer sleeve 11 is usually a vertical seamless steel pipe fixed on the bottom surface of the well body 1, the top surface of the well body 1 is concave to form a bolt head receiving cavity 12, and the bolt head receiving cavity 12 can receive the fire hydrant therein. The outer sleeve 11 and the bolt head accommodating cavity 12 are opposite to the vertical pipe 4, and the vertical pipe 4 penetrates through the outer sleeve 11 and then penetrates out of the bottom of the bolt head accommodating cavity 12, and then is connected with the fire hydrant 2. The stand pipe 4 is composed of an upper section, a middle section and a lower section, wherein the middle section is a corrugated hose and is integrally positioned in the outer sleeve 11. That is, when the fire hydrant 2 is not used at ordinary times, the vertical pipe 4 and the fire hydrant 2 can be integrally moved down to store the fire hydrant 2 in the fire hydrant storage chamber 12, and when the fire hydrant 2 and the vertical pipe 4 are stored, the fire hydrant is in a dry state because no water pump pumps water, so that the use is very convenient. When the fire hydrant 2 is used, the fire hydrant 2 and the vertical pipe 4 can be integrally moved upwards, so that the fire hydrant 2 is lifted, and the use is very convenient. The middle section of riser 4, also be corrugated hose section because the structure is weak relatively, in order to guarantee that riser 4 breaks when 2 pressures of fire hydrant are great, this section is whole to be arranged in outer tube 11, strengthens corrugated hose's intensity through outer tube 11, avoids corrugated hose to break down when high pressure state, and the effectual high pressure that has ensured is watered.

Meanwhile, when the fire hydrant 2 is used, due to the fact that the vertical pipe 4 is filled with water, the upper section of the opposite pipe 4 has upward pressure, in order to achieve longitudinal fixing of the fire hydrant 2, as shown in fig. 9, the fire hydrant positioning assembly further comprises a threaded sleeve 30 arranged on the well wall of the well body 1 at the bottom of the hydrant head receiving cavity 12, and the threaded sleeve 30 vertically penetrates through the interior of the well body 1 and the hydrant head receiving cavity 12. The threaded sleeve 30 is internally provided with a screw 31 which is matched with the threaded sleeve in a penetrating way, the lower end of the screw 31 is connected with a hand-cranking handle 32, and the upper end of the screw is connected with a connecting piece 34 through a rotary joint 33. The connecting member 34 is fixedly connected to the bolt head of the fire hydrant 2, and the specific structure of the connecting member 34 is more, for example, the connecting member 34 may be an anchor ear sleeved outside the bolt head, or may be a short rod directly welded to the bolt head, as shown in fig. 9, the connecting member 34 is an anchor ear. Of course, the connecting member 34 may have other structures that perform the same function. Therefore, when the fire hydrant needs to be used, a worker swings the hand-cranking handle in the well body 1, the screw rod 31 is pushed out upwards, the fire hydrant can be driven to ascend, and the position of the fire hydrant can be limited. The problem that the fire hydrant shakes due to water pressure when the fire hydrant is used is avoided. Similarly, when the hydrant is not in use, the handle 32 is rotated in the reverse direction.

As shown in fig. 7, a cover 13 is disposed on the top of the bolt head receiving cavity 12, one edge of the cover 13 is hinged to the upper edge of one side of the bolt head receiving cavity 12, the other edge of the cover 13 is pressed against the edge of the other side of the bolt head receiving cavity 12, the right edge of the cover 13 is hinged to the upper edge of the right side of the bolt head receiving cavity 12 in fig. 7, and the left edge of the cover 13 is pressed against the upper edge of the left side of the bolt head receiving cavity 12. The middle of the cover 13 is provided with an opening 14 which is matched with the upper section of the stand pipe 4, and the opening 14 extends from the position, close to the hinge position, of the cover 13 to the edge, far away from the hinge position, of the cover 13. When the fire hydrant 2 is located in the hydrant head receiving chamber 12, the closing cover 13 is closed, and only one opening 14 with a width of about 20cm is usually exposed, and a steel plate can be placed on the opening 14 for covering, but it is better to hinge a cover plate at the opening 14, and the opening 14 is closed through the cover plate at ordinary times. When the fire hydrant 2 is used, the cover 13 is firstly opened, and the fire hydrant 2 can be normally used after being lifted and fixed. In order to fix and limit the fire hydrant 2, the better method is that as shown in fig. 6, 7 and 8, the sealing cover 13 on two sides of the opening 14 is provided with the clamping groove 15, the upper section of the vertical pipe 4 is provided with the clamping block 16 matched with the clamping groove 15, when the fire hydrant.

In order to further improve the performance of the invention, it is preferable that a ladder 17 is arranged between the upper support ring 9 and the lower support ring 10, two ends of the ladder 17 are respectively welded with the upper support ring 9 and the lower support ring 10, the ladder 17 is used for workers to go in and out of the well body 1, and meanwhile, the upper support ring 9 and the lower support ring 10 can be connected, so as to realize the effect of dispersing stress. The position of cat ladder 17 is relative with well lid 5, and the staff of being convenient for passes in and out because well lid 5 is located the middle part of the 1 top surface of well body usually, consequently, cat ladder 17's upper end and lower extreme still have certain kink usually. In addition, a support rod 18 may be disposed between the upper support ring 9 and the lower support ring 10, and both ends of the support rod 18 are welded to the upper support ring 9 and the lower support ring 10, respectively. The provision of the support bar 18 further enhances the structural strength of the present invention. The bottom of well body 1 still is provided with water catch bowl 19, the interior bottom surface of well body 1 is to the domatic of water catch bowl 19 slope, and after 2 pressure testing of fire hydrant accomplished, the inside ponding of riser 4 and fire hydrant 2 is avoided to the release valve discharge on the accessible riser 4 hypomere of unnecessary water, and unnecessary water can converge and discharge in the water catch bowl 19 uniformly.

In order to further improve the structural strength of the present invention, it is better to make the well body 1 of high-strength plastic, and the high-strength plastic is composed of the following raw materials in parts by weight: 28 parts of unsaturated polyester resin formed by condensation polymerization of isophthalic acid and propylene glycol, 25 parts of unsaturated polyester resin formed by condensation polymerization of terephthalic acid and propylene glycol, 0.2 part of cobalt naphthenate, 0.5 part of methyl ethyl ketone peroxide, 20 parts of calcium carbonate, 0.3 part of polyhydric alcohol, 8 parts of copper powder, 5 parts of silicon oxide powder and 20 parts of carbon fiber.

The high-strength plastic is processed and prepared by the following method:

a. firstly, mixing unsaturated polyester resin formed by the polycondensation of isophthalic acid and propylene glycol and unsaturated polyester resin formed by the polycondensation of terephthalic acid and propylene glycol to form mixed resin, then adding cobalt naphthenate, methyl ethyl ketone peroxide, calcium carbonate and polyol into the mixed resin, and uniformly mixing by using a stirrer to obtain resin paste I; naturally cooling to normal temperature;

b. reheating the cooled resin paste I to be pasty, then doping copper powder and silicon oxide powder, and uniformly mixing by using a stirrer to obtain resin paste II;

c. soaking the prepared resin paste II in a kneader to form carbon fibers, completely adding the carbon fibers within 3min, kneading for 15-18 min, and then fully mixing; and finally, standing at normal temperature for 24 hours to obtain the high-strength plastic.

The performance indexes of the high-strength plastic obtained by the method are as follows:

test items	Unit of	Test standard	One time test	Second test	Three tests
						Bending strength	MPa	ISO178-2001E	286	285	287
Impact strength	KJ/m²	ISO179-2000E	168	167	168
						Molding shrinkage ratio	％	ISO2577-1984E	0.12	0.12	0.12

As can be seen from the above table, the high-strength plastic of the invention, especially the bending strength and the impact strength thereof reach the extremely high standard, and are greatly superior to other plastics on the market. The method is very suitable for the production of the high-strength plastic fire hydrant well, and the service life of the fire hydrant well is further prolonged.

Claims

1. The fire hydrant well comprises a well body (1) and a fire hydrant (2) positioned at the top of the well body (1), wherein a main water inlet pipe (3) is arranged below the well body (1), the main water inlet pipe (3) is connected with the fire hydrant (2) through a vertical pipe (4) penetrating through the well body (1), the top of the well body (1) is also provided with an access hole, and the access hole is provided with a well cover (5);

the method is characterized in that: a vertical outer sleeve (11) is arranged on the inner wall of the bottom surface of the well body (1), and the top surface of the well body (1) is concave downwards to form a bolt head accommodating cavity (12); the positions of the outer sleeve (11) and the bolt head receiving cavity (12) are opposite to the vertical pipe (4), and the vertical pipe (4) penetrates through the outer sleeve (11) and then penetrates out of the bottom of the bolt head receiving cavity (12); the vertical pipe (4) is composed of an upper section, a middle section and a lower section, the middle section is a corrugated hose, and the whole middle section is positioned in the outer sleeve (11); the top of the bolt head accommodating cavity (12) is provided with a sealing cover (13), one side of the sealing cover (13) is hinged with the upper edge of one side of the bolt head accommodating cavity (12), and the other side of the sealing cover (13) is pressed against the edge of the other side of the bolt head accommodating cavity (12); an opening (14) matched with the upper section of the stand pipe (4) is formed in the middle of the sealing cover (13), and the opening (14) extends from the position, close to the hinged position, of the sealing cover (13) to the edge, far away from the hinged position, of the sealing cover (13);

clamping grooves (15) are formed in the sealing covers (13) on the two sides of the opening (14), and clamping blocks (16) matched with the clamping grooves (15) are arranged on the upper section of the vertical pipe (4);

the bottom of the well body (1) is also provided with a water collecting tank (19), and the inner bottom surface of the well body (1) is a slope surface inclined towards the water collecting tank (19).

2. A fire hydrant well according to claim 1, wherein: the fire hydrant positioning assembly comprises a threaded sleeve (30) arranged on the well wall of the well body (1) at the bottom of the hydrant head receiving cavity (12), and the threaded sleeve (30) vertically penetrates through the interior of the well body (1) and the hydrant head receiving cavity (12); a screw rod (31) matched with the threaded sleeve (30) in a penetrating way is arranged in the threaded sleeve, the lower end of the screw rod (31) is connected with a hand-cranking handle (32), and the upper end of the screw rod is connected with a connecting piece (34) through a rotary joint (33); the connecting piece (34) is fixedly connected with the bolt head of the fire hydrant (2).